Patent Publication Number: US-11650695-B2

Title: Display device and a sensing system including the same

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2021-0105323 filed on Aug. 10, 2021, in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein in its entirety. 
     1. Technical Field 
     The present disclosure relates to a display device and a sensing system including the same. 
     2. Description of the Related Art 
     A display device is an output device for presentation of information in visual form. Display devices are being increasingly used as the information-oriented society evolves. For example, display devices are employed in various electronic devices such as smartphones, digital cameras, laptop computers, navigation devices, and smart televisions. In addition, a variety of different types of display devices may be implemented. For example, the display device may be a flat panel display device such as a liquid crystal display device, a field emission display device or an organic light emitting display device. Among the flat panel display devices, in the light emitting display device, since tach pixel of a display panel can emit light by itself, an image can be displayed without a backlight. 
     A display device may include a touch sensing unit which recognizes that an input has made from a user. The touch input may be from a pan of a user&#39;s body (e.g., finger) or an electronic pen. The touch sensing unit determines whether a user&#39;s input has been made, and calculates a corresponding position as touch input coordinates. 
     SUMMARY 
     Embodiments of the present disclosure provide a display device capable of securing reliability of a sensor over the entire area of a touch sensor area. 
     Embodiments of the present disclosure provide a display device capable of sensing a touch of an input member by using a touch sensing unit that senses a touch of a user&#39;s body, without including a separate sensor layer or digitizer layer. 
     According to an embodiment of the present disclosure, a display device may include: a display unit having a plurality of pixels; a plurality of touch electrodes disposed on the display unit; a touch line connected to a first end of each of the plurality of touch electrodes; a common voltage line spaced apart from the plurality of touch electrodes; and a plurality of switching elements connected between the common voltage line and a second end of each of the plurality of touch electrodes. 
     The display device may further include a touch driver configured to sense an input of a user&#39;s body by driving the plurality of touch electrodes during a first period, and to sense an input of an input device by driving the plurality of touch electrodes during a second period different from the first period. 
     The display device may further include a display driver configured to display an image by driving the plurality of pixels during a display period, wherein the display period overlaps the first and second periods. 
     The display device may further include an electromagnetic control late connected to a gate electrode of each of the plurality of switching elements. 
     The electromagnetic control line may supply a control signal of a gate-off level to the plurality of switching elements during the first period, and supply a control signal of a gate-on level to the plurality of switching elements during the second period. 
     The display unit may include: a substrate; a thin film transistor layer disposed on the substrate and including a plurality of thin film transistors and the plurality of switching elements; and a light emitting element layer disposed on the thin film transistor layer and including a plurality of light emitting elements, wherein the plurality of switching elements are connected to the second end of each of the plurality of touch electrodes through at least one connection electrode. 
     The plurality of touch electrodes may include: a driving electrode extending in a first direction in a first metal layer; a sensing electrode extending in a second direction crossing the first direction in the first metal layer; and a bridge electrode connecting the driving electrode in a second metal layer different from the first metal layer, wherein the common voltage line is disposed in the thin film transistor layer, the first metal layer, or the second metal layer. 
     The plurality of touch electrodes may include a driving electrode extending in a first direction, and a sensing electrode extending in a second direction crossing the first direction, wherein the touch line includes a driving line connected to a first end of the driving electrode, and a sensing line connected to a first end of the sensing electrode. 
     The plurality of switching; elements may include: a first switching transistor connected to a second end of the driving electrode; and a second switching transistor connected to a second end of the sensing electrode. 
     The common voltage line may include a first common voltage line and a second common voltage line, wherein the plurality of switching elements include: a first switching transistor connected between the first common voltage line and the second end of the driving electrode; and a second switching transistor connected between the second common voltage line and the second end of the sensing electrode. 
     The display device may further include: a first electromagnetic control line connected to a gate electrode of each of the plurality of first switching transistors; and a second electromagnetic control line connected to a gate electrode of each of the plurality of second switching transistors, wherein the first electromagnetic control line supplies a first control signal of a gate-on level to the plurality of first switching transistors during a first period, and the second electromagnetic control line supplies a second control signal of a gate-on level to the plurality of second switching transistors during, a second period, after the first period. 
     The display device may further include: a first extension line connected to the second end of the driving electrode; and a second extension line connected to the second end of the sensing electrode, wherein the plurality of switching elements include: a first switching transistor connected between the first extension line and the common voltage line; and a second switching transistor connected between the second extension line and the common voltage line. 
     The display device may further include: a first extension line connected to the second end of the driving electrode; and a second extension line connected to the second end of the sensing electrode, wherein the plurality of switching elements include: a first demultiplexer for connecting the first extension line to the common voltage line or the driving line; and a second demultiplexer for connecting the second extension line to the common voltage line or the sensing line. 
     According to an embodiment of the present disclosure, a display device includes: a display unit having a plurality of pixels; a plurality of touch electrodes disposed on the display unit; a touch line connected to a first end of each of the plurality of touch electrodes; a common voltage line spaced apart from the plurality of touch electrodes; and a plurality of coupling capacitors connected between the common voltage line and a second end of each of the plurality of touch electrodes. 
     The display device may further include a touch driver configured to sense an input of a user&#39;s body by driving the plurality of touch electrodes during a first period, and to sense an input of an input member by driving the plurality of touch electrodes during a second period different from the first period. 
     The display unit may include: a substrate; a thin film transistor layer disposed on the substrate and comprising a plurality of thin film transistors; and a light emitting element layer disposed on the thin film transistor layer and including a plurality of light emitting elements, wherein the plurality of light emitting elements include: a plurality of pixel electrodes respectively corresponding to a plurality of emission areas; a light emitting layer disposed on the plurality of pixel electrodes; and a common electrode disposed on the light emitting layer and common to the plurality of emission areas. 
     Each of the plurality of coupling capacitors may include: a first capacitor electrode connected to the second end of each of the plurality of touch electrodes; and a second capacitor electrode, wherein the second capacitor electrode is a pan of the common voltage line integrally formed with the common electrode. 
     The plurality of touch electrodes may include: a driving electrode extending in a first direction in a first metal layer; a sensing electrode extending in a second direction crossing the first direction in the first metal layer; and a bridge electrode connecting the driving electrode in a second metal layer different from the first metal layer, wherein each of the plurality of coupling capacitors includes; a first capacitor electrode disposed on the second metal layer and connected to the second end of each of the plurality of touch electrodes; and a second capacitor electrode disposed on the first metal layer and connected to the common voltage line. 
     The plurality of touch electrodes may include: a driving electrode extending in a first direction in a first metal layer; a sensing electrode extending in a second direction crossing the first direction in the first metal layer; and a bridge electrode connecting the driving electrode in a second metal layer different from the first metal layer, wherein each of the plurality of coupling capacitors includes: a first capacitor electrode disposed on the second metal layer and connected to the second end of each of the plurality of touch electrodes; and a second capacitor electrode disposed on the first metal layer, wherein the second capacitor electrode is a part of the common voltage line. 
     The plurality of touch electrodes may include a driving electrode extending in a first direction, and a sensing electrode extending in a second direction crossing the first direction, wherein the touch line includes a driving line connected to a first end of the driving electrode, and a sensing line connected to a first end of the sensing electrode. 
     The plurality of coupling capacitors may include: a first coupling capacitor connected between the common voltage line and a second end of the driving electrode; and a second coupling capacitor connected between the common voltage line and a second end of the sensing electrode. 
     The common voltage line may include a first common voltage line, a second common voltage line, a third common voltage line, and a fourth common voltage line, wherein the plurality of coupling capacitors include: a first coupling capacitor connected between a second end of the driving electrode and the first or second common voltage line; and a second coupling capacitor connected between a second end of the sensing electrode and the third or fourth common voltage line. 
     The common voltage line may include a first common voltage line, a second common voltage line, a third common voltage line, and a fourth common voltage line, wherein the plurality of coupling capacitors include: a first-first coupling capacitor connected between the first common voltage line and a second end of the driving electrode; a first-second coupling capacitor connected between the second common voltage line and an end of the first-first coupling capacitor: a second-first coupling capacitor connected between the third common voltage line and a second end of the sensing electrode; and a second-second coupling capacitor connected between an end of the second-first coupling capacitor and the fourth common voltage line. 
     The common voltage line may include a first common voltage line and a second common voltage line, wherein the plurality of coupling capacitors include: a first coupling. capacitor connected between the first common voltage line and a second end of the driving electrode; and a second coupling capacitor connected between the second common voltage line and a second end of the sensing electrode. 
     The display device may further include a touch driver configured to supply a first driving signal having a first phase to the plurality of driving electrodes during a first period, and supply a first common voltage having the first phase to the first common voltage line during the first period, the touch driver is configured to supply a second driving signal having the first phase to the plurality of sensing electrodes during a second period after the first period, and supply a second common voltage having a second phase opposite to the first phase to the second common voltage line during the second period. 
     The common voltage line may include a first common voltage line, a second common voltage line, a third common voltage line, and a fourth common voltage line, wherein the plurality of coupling capacitors may include: a plurality of first coupling capacitors alternately connected to the first or second common voltage line; and a plurality of second coupling capacitors alternately connected to the third or fourth common voltage line. 
     The display device may further include a touch driver configured to supply a first driving signal having a first phase to the plurality of driving electrodes during a first period, and to supply first and second common voltages having the first phase to the first and second common voltage lines during the first period, wherein the touch driver is configured to supply a second-first driving signal having the first phase to a first portion of the plurality of sensing electrodes during a second period after the first period, and supply a third common voltage having a second phase opposite to the first phase to the third common voltage line during the second period, and the touch driver is configured to supply a second-second driving signal having the second phase to a second portion of the plurality of sensing electrodes during the second period, and to supply a fourth common voltage having the first phase to the fourth common voltage line during the second period. 
     According to an embodiment of the present disclosure, a sensing system includes: a display device for displaying an image; and wherein the display device includes: a display unit having a plurality of pixels; a plurality of touch electrodes disposed on the display unit; a touch line connected to a first end of each of the plurality of touch electrodes; a common voltage line disposed away from the plurality of touch electrodes; a plurality of switching elements connected between the common voltage line and a second end of each of the plurality of touch electrodes; and a touch driver configured to sense an input of a user&#39;s body by driving the plurality of touch electrodes during a first period, and to sense an input of an input member by driving the plurality of touch electrodes during a second period different from the first period. 
     The touch driver may supply a first driving signal having a first phase to at least one touch electrode disposed on a first side of a point among the plurality of touch electrodes, and may supply a second driving signal having a second phase opposite to the first phase to at least one touch electrode disposed on a second side of the point among the plurality of touch electrodes, and the touch driver may receive a first sensing signal having the first phase from at least one touch electrode disposed on the first side of the point, and may receive a second sensing signal having the second phase from at least one touch electrode disposed on the second side of the point. 
     The input member may be charged by an electromagnetic resonance method when the first and second driving signals are disposed on the point during a second-first period in which the first and second driving signals are supplied to the plurality of touch electrodes, the input member may be discharged when a supply of the first and second driving signals is stopped during a second-second period immediately after the second-first period, and the touch driver may receive a first sensing signal having the first phase from at least one touch electrode disposed on the first side of the point during the second-second period, and may receive a second sensing signal having the second phase from at least one touch electrode disposed on the second side of the point. 
     According to embodiments of the present disclosure, in the display device and a sensing system including the same, a touch line may supply a driving signal to a first end of touch electrodes, and a common voltage line may supply a common voltage to a second end of the touch electrodes, which is farthest from the touch line, so that the potential of the second end of the touch electrodes may be stably maintained. The common voltage line may supply a common voltage to the second end of the touch electrodes, so that sensing sensitivity at the second end of the touch electrodes may be improved. Accordingly, the display device and the sensing system including the same may include a switching element and the common voltage line disposed in a touch peripheral area, so that the reliability of the sensor may be secured over the entire area of the touch sensor area. 
     According to embodiments of the present disclosure, in the display device and, the sensing system including the same, the touch line may supply a driving signal to a first end of the touch electrodes, and the coupling capacitor may be connected between a second end of the touch electrodes, which is farthest from the touch line and the common voltage line, so that the potential of the second end of the touch electrodes may be stably maintained. The coupling, capacitor may improve sensing sensitivity at the second end of the touch electrodes. Accordingly, the display device and the sensing system including the same may include the coupling capacitor and the common voltage line disposed in the touch peripheral area, so that the reliability of the sensor may be secured over the entire area of the touch sensor area. 
     According to embodiments of the present disclosure, in the display device and the sensing system including the same, the touch of the input member may be sensed using the touch sensing unit that senses the touch of the user&#39;s body. Accordingly, the display device and the sensing system including the same do not include a separate sensor layer or a digitizer layer for the electromagnetic resonance of the touch input member, thereby reducing the thickness of the display device and reducing cost. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other features of the present disclosure will become more apparent by describing in detail embodiments thereof with reference to the attached drawings, in which: 
         FIG.  1    is a perspective view showing a display device according to an embodiment of the present disclosure; 
         FIG.  2    is a cross-sectional view illustrating a display device according an one embodiment of the present disclosure; 
         FIG.  3    is a cross-sectional view showing a display device according an another embodiment of the present disclosure; 
         FIG.  4    is a plan view illustrating a display unit of a display device according to an embodiment of the present disclosure; 
         FIG.  5    is a plan view illustrating a touch sensing unit of a display device according to an embodiment of the present disclosure; 
         FIG.  6    is an enlarged view of area A 1  of  FIG.  5   ; 
         FIG.  7    is an enlarged view illustrating a part of a display device according to an embodiment of the present disclosure; 
         FIG.  8    is a cross-sectional view taken along line I-I′ of  FIG.  7   ; 
         FIG.  9    is a cross-sectional view illustrating a display area and a non-display area in a display device according to an embodiment of the present disclosure; 
         FIG.  10    is a view illustrating a sensing driving process and the charging of an input member in a sensing system according to an embodiment of the present disclosure; 
         FIG.  11    is a view illustrating the discharging of an input member and the input sensing process in the sensing system according to an embodiment of the present disclosure; 
         FIG.  12    is a waveform diagram illustrating a plurality of first driving signals, a plurality of second driving signals, a control signal, an electromotive force of an input member, and a differential sensing signal in a sensing system according to an embodiment of the present disclosure; 
         FIG.  13    is a timing diagram illustrating the operation of a display driver and a touch driver in a display device according to an embodiment of the present disclosure; 
         FIG.  14    is a graph illustrating the sensing sensitivity of a sensing system according to an embodiment of the present disclosure; 
         FIG.  15    is a plan view illustrating a touch sensing unit of a display device according to an embodiment of the present disclosure; 
         FIG.  16    is a waveform diagram illustrating a plurality of first driving signals, a plurality of second driving signals, a first control signal, a second control signal, an electromotive force of an input member, and a differential sensing signal in a sensing system according to an embodiment of the present disclosure; 
         FIG.  17    is a plan view illustrating a touch sensing unit of a display device according to an embodiment of the present disclosure; 
         FIG.  18    is a plan view illustrating a touch sensing unit of a display device according to an embodiment of the present disclosure; 
         FIG.  19    is a circuit diagram illustrating an example of a first demultiplexer in the display device of  FIG.  18   ; 
         FIG.  20    is a circuit diagram illustrating an example of a first demultiplexer in the display device of  FIG.  18   ; 
         FIG.  21    is a circuit diagram illustrating an example of a Frig demultiplexer in the display device of  FIG.  18   ; 
         FIG.  22    is a plan view illustrating a touch sensing unit, a circuit board, and a touch driver of a display device according to an embodiment of the present disclosure; 
         FIG.  23    is a plan view illustrating a touch sensing unit, a circuit board, a touch driving circuit, and an electromagnetic driving circuit of a display device according to another embodiment; 
         FIG.  24    is a plan view illustrating a touch sensing unit, a circuit board, a touch driving circuit, and an electromagnetic driving circuit of a display device according, to an embodiment of the present disclosure; 
         FIG.  25    is a plan view illustrating a touch sensing unit of a display device according to an embodiment of the present disclosure; 
         FIG.  26    is a plan view illustrating an example of a touch sensing unit of the display device of  FIG.  25   ; 
         FIG.  27    is a cross-sectional view taken along line of II-II′  FIG.  26   ; 
         FIG.  28    is a plan view illustrating an example of a touch sensing unit of the display device of  FIG.  25   ; 
         FIG.  29    is a cross-sectional view taken along line III-III′ of  FIG.  28   ; 
         FIG.  30    is a plan view illustrating an example of a touch sensing unit of the display device of  FIG.  25   ; 
         FIG.  31    is a graph illustrating sensing sensitivity of a sensing system according to an embodiment of the present disclosure; 
         FIG.  32    is a plan view illustrating a touch sensing unit of a display device according to an embodiment of the present disclosure; 
         FIG.  33    is a plan view illustrating a touch sensing unit of a display device according to an embodiment of the present disclosure; 
         FIG.  34    is a plan view illustrating a touch sensing unit of a display device according to an embodiment of the present disclosure; 
         FIG.  35    is a waveform diagram illustrating a signal applied to the touch sensing unit of  FIG.  34   ; 
         FIG.  36    is a plan view illustrating a touch Sensing unit of a display device according to an embodiment of the present disclosure; and 
         FIG.  37    is a waveform diagram illustrating a signal applied to the touch sensing unit of  FIG.  36   . 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     In the following description, for the purposes of explanation, numerous specific details are set forth to provide a thorough understanding of various embodiments or implementations of the disclosure. As used herein “embodiments” and “implementations” are interchangeable words that are non-limiting examples of devices or methods employing one or more of the inventions of disclosures set forth herein. It is apparent, however, that various embodiments may be practiced without these specific details or with one or more equivalent arrangements. In other instances, well-known structures and devices are shown in block diagram form to avoid unnecessarily obscuring various embodiments. Further, various embodiments may be different, but do not have to be exclusive. For example, specific shapes, configurations, and characteristics of an embodiment may be used or implemented in other embodiments. 
     Unless otherwise specified, the illustrated embodiments are to be understood as providing features of varying detail of some ways in which the disclosure may be implemented in practice. Therefore, unless otherwise specified, the features, components, modules, layers, films, panels, regions, and/or aspects, etc. (hereinafter individually or collectively referred to as “elements”), of the various embodiments may be otherwise combined, separated, interchanged, and/or rearranged, 
     The use of cross-hatching and/or shading in the accompanying drawings is generally provided to clarify boundaries between adjacent elements. As such, neither the presence nor the absence of cross-hatching or shading conveys or indicates any preference or requirement for particular materials, material properties, dimensions, proportions, commonalities between illustrated elements, and/or any other characteristic, attribute, property, etc., of the elements, unless specified. 
     Further, in the accompanying drawings, the size and relative sizes of elements may be exaggerated for clarity and/or descriptive purposes. When an embodiment may be implemented differently, a specific process order may be performed differently from the described order. For example, two consecutively described processes may be performed substantially at the same time or performed in an order opposite to the described order. In addition, like reference numerals may denote like elements. 
     When an element, such as a layer, is referred to as being “on,” “connected to,” or “coupled to” another element or layer, it may be directly on, connected to, or coupled to the other element or layer or intervening elements or layers may be present. When, however, an element or layer is referred to as being “directly on,” “directly connected to,” or “directly coupled to” another element or layer, there are no intervening elements or layers present. The term “connected” may refer to physical, electrical, and/or fluid connection, with or without intervening elements. 
     Further, the X-axis, the Y-axis, and the Z-axis are not limited to three axes of a rectangular coordinate system, and thus the. X-, Y-, and Z-axes, and may be interpreted, in a broader sense. For example, the X-axis, the Y-axis, and the Z-axis may be perpendicular to one another, or may represent different directions that are not perpendicular to one another. 
     For the purposes of this disclosure, “at least one of X, Y, and Z” and “at least one selected from the group consisting of X, Y, and Z” may be construed as X only, Y only, Z only, or any combination of two or more of X, Y, and Z, such as, for instance, XYZ, XYY, YZ, and ZZ. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. 
     Although the terms “first,” “second,” and the like may be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another element. Thus, a first element discussed below could be termed a second element. 
     Spatially relative terms, such as “beneath,” “below,” “under,” “lower,” “above,” “&#39;upper,” “over,” “higher,” “side” (e.g., as in “sidewall”), and the like, may be used herein for descriptive purposes, and, thereby, to describe one elements relationship to another element(s) as illustrated in the drawings. Spatially relative terms are intended to encompass different orientations of an apparatus in use, operation, and/or manufacture in addition to the orientation depicted in the drawings. For example, if the apparatus in the drawings is turned over, elements described as “below” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, the term “below” can encompass both an orientation of above and below. Furthermore, the apparatus may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and, as such, the spatially relative descriptors used herein should be interpreted accordingly. 
     The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, the singular forms, “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise, Moreover, the terms “comprises,” “comprising,” “includes,” and/or “including,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, components, and/or groups thereof but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It is also noted that, as used herein, the terms “substantially,” “about,” and other similar terms, are used as terms of approximation, not as terms of degree, and thus are utilized to account for inherent deviations in measured, calculated, and/or provided values that would be recognized by one of ordinary skill in the art. 
     Various embodiments are described herein with reference to sectional and/or exploded illustrations that are schematic illustrations of idealized embodiments and/or intermediate structures. As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, embodiments disclosed herein should not necessarily be construed as limited to the particular illustrated shapes of regions, but are to include deviations in shapes that result from, for instance, manufacturing. In this manner, regions illustrated in the drawings may be schematic in nature, and the shapes of these regions may not reflect actual shapes of regions of a device and are not necessarily intended to be limiting. 
     As customary in the field, some embodiments are described and illustrated in the accompanying drawings in terms of functional blocks, units, parts, and/or modules. Those skilled in the art will appreciate that these blocks, units, parts, and/or modules are physically implemented by electronic (or optical) circuits, such as logic circuits, discrete components, microprocessors, hard-wired circuits, memory elements, wiring connections, and the like, which may be formed using semiconductor-based fabrication techniques or other manufacturing technologies. In the case of the blocks, units, parts, and or modules being implemented by microprocessors or other similar hardware, they may be programmed and controlled using software (e.g., microcode) to perform various functions discussed herein and may optionally be driven by firmware and/or software. It is also contemplated that each block, unit, part, and/or module may be implemented by dedicated hardware, or as a combination of dedicated hardware to perform some functions and a processor (e.g., one or more programmed microprocessors and associated circuitry) to perform other functions. In addition, each block, unit, part, and/or-module of some embodiments may be physically separated into two or more interacting and discrete blocks, units, parts, and/or modules. Further, the blocks, units, parts, and/or modules of some embodiments may be physically combined into more complex blocks, units, parts, and/or modules. 
     Unless otherwise defined or implied herein, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the disclosure, and should not be interpreted in an ideal or overly formal sense, unless clearly so defined herein. 
       FIG.  1    is a perspective view showing a display device according to an embodiment of the present disclosure. 
     Referring to  FIG.  1   , a display device  10  may be applied to portable electronic devices such as a mobile phone, a smartphone, a tablet personal computer (PC′), a mobile communication terminal, an electronic organizer, an electronic book, a portable multimedia player (PMP), a navigation system, an ultra mobile PC (UMPC) or the like. For example, the display device  10  may be applied as a display unit of a television, a laptop, a monitor, a billboard, or an Internet-of-Things (IoT) device, As another example, the display device  10  may be applied to wearable devices such as a smart watch, a watch phone, a glasses type display, or a head mounted display (HMD). As yet another example, the display device  10  may be applied to a dashboard of a vehicle, a center fascia of a vehicle, a center information display (CID) disposed on a dashboard of a vehicle, a room mirror display in place of side mirrors of a vehicle, or a display disposed on a rear surface of a front seat for rear seat entertainment of a vehicle. 
     The display device  10  may have a planar shape similar to a quadrilateral shape. For example, the display device  10  may have a shape similar to a quadrilateral shape, in a plan view, having short sides in an X-axis direction and long sides in a Y-axis direction. The corner where the short side in the X-axis direction and the long side in the Y-axis direction meet may be rounded to have a predetermined curvature or may be right-angled. The planar shape of the display device  10  is not limited to a quadrilateral shape, and may be in a shape similar to another polygonal shape, a circular shape, or elliptical shape. 
     The display device  10  may include the display panel  100 , the display driver  200 , the circuit board  300 , and the touch driver  400 . 
     The display panel  100  may include a main region MA and a sub-region SBA. 
     The main region MA may include the display area DA including pixels for displaying an image and the non-display area NDA disposed around the display area DA. The display area DA may emit light from a plurality of emission areas or a plurality of opening areas. For example, the display panel  100  may include a pixel circuit including switching elements, a pixel defining layer for defining an emission area or an opening area, and a self-light emitting element. 
     For example, the self-light emitting element may include at least one of an organic light emitting diode including an organic light emitting layer, a quantum dot light emitting diode including a quantum dot light emitting layer, an inorganic light emitting diode including an inorganic semiconductor, or a micro light emitting diode (micro LED), but is not limited thereto. 
     The non-display area NDA may be an area outside the display area DA. The non-display area NDA may be an edge area of the main region MA of the display panel  100 . The non-display area NDA may include a gate driver that supplies gate signals to gate lines, and fan-out lines that connect the display driver  200  to the display area DA. 
     The sub-region SBA may extend from one side of the main region MA. The sub-region SBA may include a flexible material which can be bent, folded or rolled, For example, when the sub region SBA is bent, the sub-region SBA may overlap the main region MA in a thickness direction (Z-axis direction). The sub-region SBA may include a display driver  200  and a pad unit connected to the circuit board  300 . Optionally, the sub-region SBA may be omitted, and the display driver  200  and the pad unit may be arranged in the non-display area NDA. 
     The display driver  200  may output signals and voltages for driving the display panel  100 . The display driver  200  may supply a data voltage to a data line. The display driver  200  may supply a power voltage to the power line and may supply a gate control signal to the gate driver. The display driver  200  may be an integrated circuit (IC) and mounted on the display panel  100  by a chip on glass (COG) method, a chip on plastic (COP) method, or an ultrasonic bonding, method. For example, the display driver  200  may be disposed in the sub-region SBA, and may overlap the main region MA in the thickness direction (Z-axis direction) by bending of the sub-region SBA. For another example, the display driver  200  may be mounted on the circuit board  300 . 
     The circuit board  300  may be attached to the pad unit of the display panel  100  by using an anisotropic conductive film (ACF). Lead lines of the circuit board  300  may be electrically connected to the pad unit of the display panel  100 . The circuit board  300  may be a flexible printed circuit board, a printed circuit board, or a flexible film such as a chip on film. 
     The touch driver  400  may be mounted on the circuit board  300 . The touch driver  400  may be connected to a touch sensing unit of the display panel  100 . The touch driver  400  may supply a driving signal to a plurality of touch electrodes of the touch sensing unit and may sense an amount of change in capacitance between the plurality of touch electrodes. For example, the driving signal may be a pulse signal having a predetermined frequency. The touch driver  400  may calculate whether an input is made and input coordinates corresponding to where the input is made based on an amount of change in capacitance between the plurality of touch electrodes. The touch driver  400  may be an integrated circuit (IC). 
       FIG.  2    is a cross-sectional view illustrating a display device according to an embodiment of the present disclosure. 
     Referring to  FIG.  2   , the display panel  100  may include a display unit DU and a touch sensing unit TSU. The display unit DU may include a substrate SUB, a thin film transistor layer TFTL, a light emitting element layer EML, and an encapsulation layer TFEL. 
     The substrate SUB may be a base substrate or a base member. The substrate SUB may be a flexible substrate which can be bent, folded or rolled. For example, the substrate SUB may include an insulating material such as a polymer resin such as polyimide (PI), but the present disclosure is not limited thereto. As another example, the SUB may include a glass material or a metal material. 
     The thin film transistor layer TFTL may be disposed on the substrate SUB. The thin film transistor layer TFTL may include a plurality of thin film transistors constituting a pixel circuit of pixels. The thin film transistor layer TFTL may further include gate lines, data lines, power lines, gate control lines, fan-out lines that connect the display driver  200  to the data lines, lead lines that connect the display driver  200  to the pad unit, and the like. Each of the thin film transistors may include a semiconductor region, a drain electrode, a source electrode, and a gate electrode. For example, when the gate driver is formed on one side of the non-display area NDA of the display panel  100 , the gate driver ma include thin film transistors. 
     The thin film transistor layer TFTL may be disposed in the display area DA, the non-display area NDA, and the sub-region SBA. Thin film transistors, gate lines, data lines, and power lines of each of the pixels of the thin film transistor layer TFTL may be disposed in the display area DA. Gate control lines and fan-out lines of the thin film transistor layer TFTL may be disposed in the non-display area NDA. The lead lines of the thin film transistor layer TFTL may be disposed in the sub-region SBA. 
     The light emitting element layer EML may be disposed on the thin film transistor layer TFTL. The light emitting element layer EML may include a plurality of light emitting elements in which a first electrode, a light emitting layer, and a second electrode are sequentially stacked to emit light, and a pixel defining layer for defining pixels. A plurality of light emitting elements of the light emitting element layer EML may be disposed in the display area DA. The light emitting element layer EML may not be disposed in the non-display area NDA. 
     For example, the light emitting element layer EML may be an organic light emitting layer including an organic material. The light emitting element layer EML may include a hole transporting layer, an organic light emitting layer, and an electron transporting layer. When the first electrode receives a predetermined voltage through the thin film transistor of the thin film transistor layer TFTL and the second electrode receives the common voltage, holes and electrons may be transferred to the organic light emitting layer through the hole transporting layer and the electron transporting layer, respectively and may be combined with each other to emit light in the organic light emitting layer. For example, the first electrode may be an anode electrode, and the second electrode may be a cathode electrode, but the present disclosure is not limited thereto. 
     As another example, the plurality of light emitting elements may include a quantum dot light emitting diode including a quantum dot light emitting layer, an inorganic light emitting diode including an inorganic semiconductor, or an ultra-small light emitting diode. 
     The encapsulation layer TFEL may cover the top surface and the side surface of the light emitting element layer EML, and may protect the light emitting element layer EML. The encapsulation layer TFEL may include at least one inorganic layer and at least one organic layer for encapsulating the light emitting element layer EML. 
     The touch sensing unit TSU may be disposed on the encapsulation layer TFEL. The touch sensing unit TSU may include a plurality of touch electrodes for sensing a user&#39;s touch in a capacitive manner, and touch lines for connecting the plurality of touch electrodes to the touch driver  400 . The touch electrode may include a driving electrode and a sensing electrode, and the touch line may include a driving line connected to the driving electrode and a sensing line connected to the sensing electrode. The touch sensing unit TSU may sense a touch of a user&#39;s body by using a mutual capacitance or self-capacitance method. For example, the touch driver  400  may supply a driving signal to a plurality of driving electrodes and receive a sensing signal from a plurality of sensing electrodes to sense an amount of change in mutual capacitance between the driving electrode and the sensing electrode. As another example, the touch driver  400  may supply a driving signal to each of the plurality of driving electrodes and the plurality of sensing electrodes, and receive a sensing signal from each of the plurality of driving electrodes and the plurality of sensing electrodes, thereby sensing an amount of change in self-capacitance of each of the plurality of driving electrodes and the plurality of sensing electrodes. 
     As another example, the touch sensing unit TSU may sense the approach or contact of an input member such as an input pen. Here, the input pen may be a stylus pen, an electromagnetic pen, a smart pen, or an active pen, but the present disclosure is not limited thereto. For example, the stylus pen may include a coil, and may output a radio frequency signal in response to a magnetic field or electromagnetic signal. 
     The plurality of touch electrodes of the touch sensing unit TSU may be disposed in a touch sensor area overlapping the display area DA. The touch lines of the touch sensing unit TSU may be disposed in a touch peripheral area that overlaps the non-display area NDA. 
     For example, a polarizing film and a cover window may be additionally disposed on the touch sensing unit TSU. The polarizing film may be disposed on the touch sensing unit TSU, and the cover window may be disposed on the polarizing film by an adhesive member. 
     The sub-region SBA of the display panel  100  may extend from one side of the main region MA. The sub-region SBA may include a flexible material which can be bent, folded or rolled. For example, when the sub-region SBA is bent, the sub-region SBA may overlap the main region MA in a thickness direction (Z-axis direction). In other words, the sub-region SBA may be disposed below the display area DA. The sub-region SBA may include the display driver  200  and the pad unit connected to the circuit board  300 . 
       FIG.  3    is a cross-sectional view showing a display device according to an embodiment of the present disclosure. The display device illustrated in  FIG.  3    is different from the display device illustrated in  FIG.  2    in the configuration of the touch sensing unit. A description of the same configuration as the above-described configuration will be briefly given or omitted. 
     Referring to  FIG.  3   , the display panel  100  may include the display unit DU and the touch sensing unit TSU. The display unit DU may include a first substrate SUB 1 , the thin film transistor layer TFTL, the light emitting element layer EML, and the encapsulation layer TFEL. 
     The first substrate SUB 1  may be a base substrate or a base member. For example, the first substrate SUB 1  may include an insulating material such as a polymer resin such as polyimide (PI), but the present disclosure is not limited thereto. 
     The thin film transistor layer TFTL, the light emitting element layer EML, and the encapsulation layer TFEL may be sequentially stacked on the first substrate SUB 1 . 
     The touch sensing unit TSU may include a second substrate SUB 2  and a touch sensor layer TSL. For example, the touch sensing unit TSU may be separately fabricated and attached to the display unit DU, but is not limited thereto. 
     The second substrate SUB 2  may be disposed on the encapsulation layer TFEL. The second substrate SUB 2  may be a base substrate or a base member, and may support the touch sensing unit TSU. The second substrate SUB 2  may be disposed between the touch sensing layer TSL and the encapsulation layer TFEL. For example, the second substrate SUB 2  may include a glass material or a metal material, but is not limited thereto. As another example, the second substrate SUB 2  may include an insulating material such as a polymer resin such as polyimide (PI). 
     The touch sensor layer TSL may be disposed on the second substrate SUB 2 . The touch sensor layer TSL may include a plurality of touch electrodes for sensing a user&#39;s touch in a capacitive manner, and touch lines for connecting the plurality of touch electrodes to the touch driver  400 . For example, the touch sensor layer TSL may sense the user&#39;s touch by using a mutual capacitance method or a self-capacitance method. As another example, the touch sensing unit TSU may detect an approach or contact of an input member such as an input pen. Here, the input pen may be a stylus pen, an electromagnetic pen, a smart pen, or an active pen, but is not limited thereto. 
       FIG.  4    is a plan view illustrating a display unit of a display device according to an embodiment of the present disclosure. 
     Referring to  FIG.  4   , the display unit DU may include the display area DA and the non-display area NDA. 
     The display area DA, which is an area for displaying an image, may be the central area of the display panel  100 . The display area DA may include a plurality of pixels SP, a plurality of gate lines GL, a plurality of data lines DL, and a plurality of power lines VL. Each of the plurality of pixels SP may be an area of the smallest unit that outputs light. 
     The plurality of gate lines GL may supply gate signals received from a gate driver  210  to the plurality of pixels SP. The plurality of gate lines GL may extend in the X-axis direction and may be spaced apart from each other in the Y-axis direction that crosses the X-axis direction. 
     The plurality of data lines DL may supply a data, voltages received from the display driver  200  to the plurality of pixels SP. The plurality of data lines DL may extend in the Y-axis direction and may be spaced apart from each other in the X-axis direction. 
     The plurality of power lines VL may supply a power voltage received from the display driver  200  to the plurality of pixels SP. Here, the power voltage may be at least one of a driving voltage, an initialization voltage, a reference voltage, or a low potential voltage. The plurality of power lines VL may extend in the Y-axis direction and may be spaced apart from each other in the X-axis direction. 
     The non-display area NDA may surround the display area DA. The non-display area NDA may include the gate driver  210 , fan-out lines FOL, and a gate control line GCL. The gate driver  210  may generate a plurality of gate signals based on the gate control signal, and may sequentially supply the plurality of gate signals to the plurality of gate lines GL according to a set order. 
     The fan-out lines FOL, may extend from the display driver  200  to the display area DA. The fan-out lines FOL may supply the data voltage received from the display driver  200  to the plurality of data lines DL. 
     The gate control line GCL may extend from the display driver  200  to the gate driver  210 . The gate control line GCL may supply the gate control signal received from the display driver  200  to the gate driver  210 . 
     The sub-region SBA may include the display driver  200 , a display pad area DPA, and first and second touch pad areas TPA 1  and TPA 2 . 
     The display driver  200  may output signals and voltages for driving the display panel  100  to the fan-out lines FOL. The display driver  200  may supply a data voltage to the data line DL through the fan-out lines FOL. The data voltage may be supplied to the plurality of pixels SP to determine the luminance of the plurality of pixels SP. The display driver  200  may supply the gate control signal to the gate driver  210  through the gate control line GCL. 
     The display pad area DPA, the first touch pad area TPA 1 , and the second touch pad area TPA 2  may be disposed at the edge of the sub-region SBA. The display pad area DPA, the first touch pad area TPA 1 , and the second touch pad area TPA 2  may be electrically connected to the circuit board  300  by using a low-resistance high-reliability material such as an anisotropic conductive film, or self assembly anisotropic conductive paste (SAP). 
     The display pad area DPA may include a plurality of display pad units DP. The plurality of display pad units DP may be connected to a main processor through the circuit board  300 . The plurality of display pad units DP may be connected to the circuit board  300  to receive digital video data, and may supply the digital video data to the display driver  200 . 
       FIG.  5    is a plan view illustrating a touch sensing unit of a display device according to an embodiment of the present disclosure. 
     Referring to  FIG.  5   , the touch sensing unit TSU may include a touch sensor area TSA for sensing a user&#39;s touch, and a touch peripheral area TOA disposed around the touch sensor area TSA. The touch sensor area TSA may overlap the display area DA of the display unit DU, and the touch peripheral area TOA may overlap the non-display area NDA of the display unit DU. 
     The touch sensor area TSA may include a plurality of touch electrodes SEN and a plurality of dummy electrodes DME. The plurality of touch electrodes SEN may form mutual capacitance or self-capacitance to sense a touch of an object or a person. The plurality of touch electrodes SEN may include a plurality of driving electrodes TE and a plurality of sensing electrodes RE. 
     The plurality of driving electrodes TE may be spaced apart from each other in the X-axis direction and the Y-axis direction. The driving electrodes TE adjacent in the Y-axis direction may be electrically connected through a bridge electrode CE. The plurality of driving electrodes TE may be connected to a first touch pad unit TP 1  through a driving line TL. The plurality of driving electrodes TE and the plurality of bridge electrodes CE connected to one driving line TL may extend in the Y-axis direction. For example, the driving, electrodes TE disposed below the touch sensor area TSA may be connected to the first touch pad unit TP 1  through the driving line TL. The driving line TL may extend to the first touch pad unit. TP 1  through the lower side of the touch peripheral area TOA. The first touch pad unit TP 1  may be connected to the touch driver  400  through the circuit board  300 . 
     The touch sensor area TSA may further include the bridge electrode CE connecting the driving electrodes TE. The bridge electrode CE may be bent at least once. For example, the bridge electrode CE may have an angle bracket shape (“&lt;” or “&gt;”), but the planar shape of the bridge electrode CE is not limited thereto. The driving electrodes TE adjacent to each other in the Y-axis direction may be connected by a plurality of bridge electrodes CE, and in the case one of the bridge electrodes CE is disconnected, the driving electrodes TE may be stably connected through the remaining bridge electrode CE. The driving electrodes TE adjacent to each other may be connected by two bridge electrodes CE, but the number of bridge electrodes CE is not limited thereto. 
     The bridge electrode CE may be disposed on a different layer from the plurality of driving electrodes TE and the plurality of sensing electrodes RE. The sensing electrodes RE adjacent to each other in the X-axis direction may be electrically connected through a connection portion disposed on the same layer as the plurality of driving electrodes TE or the plurality of sensing electrodes RE, and the driving electrodes TE adjacent in the Y-axis direction may be electrically connected through the bridge electrode CE disposed on a different layer from the plurality of driving electrodes TE or the plurality of sensing electrodes RE. Accordingly, although the bridge electrode CE overlaps the plurality of sensing electrodes RE in the Z-axis direction, the plurality of driving electrodes TE and the plurality of sensing electrodes RE may be insulated from each other. Mutual capacitance may be formed between the driving electrode TE and the sensing electrode RE. 
     The plurality of sensing electrodes RE may extend in the X-axis direction and may be spaced apart from each other in the Y-axis direction. The sensing electrodes RE adjacent in the X-axis direction may be electrically connected through a connection portion. The connection portion may be integrally formed between two adjacent sensing electrodes RE. 
     The plurality of sensing electrodes RE may be connected to the second touch pad unit TP 2  through a sensing line RL. For example, the sensing electrodes RE disposed on the right side of the touch sensor area TSA may be connected to a second touch pad unit TP 2  through the sensing line RL. The sensing line RL may extend to the second touch pad unit TP 2  through the right side and the lower side of the touch peripheral area TOA. The second touch pad unit TP 2  may be connected to the touch driver  400  through the circuit board  300 . 
     Each of the plurality of dummy electrodes DME may be surrounded by the driving electrode TE or the sensing electrode RE. Each of the dummy electrodes DME may be insulated by being spaced apart from the driving electrode TE or the sensing electrode RE. Accordingly, the dummy electrode DME may be electrically floating. Optionally, the plurality of dummy electrodes DME may be omitted. 
     The touch peripheral area TOA may, include the driving line TL, the sensing line RL, a plurality of switching transistors EMT, an electromagnetic control line ECL, and a common voltage line VCL. 
     The switching transistor EMT may be a switching element connected between the plurality of touch electrodes SEN and the common voltage line VCL. The plurality of switching transistors EMT may include a first switching transistor EMT 1  and a second switching transistor EMT 2 . The first switching transistor EMT 1  may be disposed on the upper side of the touch peripheral area TOA. The first switching transistor EMT 1  may be disposed on the opposite side of the driving line TL. The first switching transistor EMT 1  may be connected to the driving electrodes TE disposed farthest from the driving line TL. For example, the first switching transistor EMT 1  may be disposed between the driving electrode TE disposed farthest from the driving line TL and a side of the touch sensing unit TSU disposed farthest from the sub-region SBA. The first switching transistor EMT 1  may be disposed between the driving electrodes TE and the common voltage line VCL disposed on the upper side of the touch sensor area TSA. The first switching transistor EMT 1  may be turned on based on a control signal of the electromagnetic control line ECL. For example, the control signal of the electromagnetic control line ECL may be provided to a gate electrode of the first switching transistor EMT 1 . The first switching transistor EMT 1  may be turned off during the touch sensing period, and the driving electrodes TE may not receive a common voltage. The first switching transistor EMT 1  may be turned on during the electromagnetic sensing period to supply a common voltage to the driving electrodes TE. Here, the touch driver  400  may sense a touch of the user&#39;s body during the touch sensing period, and sense the approach or contact of an input member such as an input pen during the electromagnetic sensing period. 
     The second switching transistor EMT 2  may be disposed on the left side of the touch peripheral area TOA. The second switching transistor EMT 2  may be disposed on the opposite side of the sensing line RL. The second switching transistor EMT 2  may be connected to the sensing electrodes RE disposed farthest from the sensing line RL. The second switching transistor EMT 2  may be disposed between the sensing electrodes RE and the common voltage line VCL disposed on the left side of the touch sensor area ISA. The second switching transistor EMT 2  may be turned on based on a control signal of the electromagnetic control line ECL. For example, the control signal of the electromagnetic control line ECL may be provided to a gate electrode of the second switching transistor EMT 2 . The second switching transistor EMT 2  may be turned off during the touch sensing period, and the sensing electrodes RE may not receive the common voltage. The second switching transistor EMT 2  may be turned on during the electromagnetic sensing period to supply a common voltage to the sensing electrodes RE. In other words, the first and second switching transistors EMT 1  and EMT 2  may be on and off at the same time. 
     The electromagnetic control line ECL, may supply a control signal to the gate electrode of the plurality of switching transistors EMT. The electromagnetic control line ECL may extend to the first touch pad unit TP 1  via the upper side, the left side, and the lower side of the touch peripheral area TOA. The electromagnetic control line ECL may supply a gate-off level control signal to the plurality of switching transistors EMT during the touch sensing period. The electromagnetic control line ECL may supply a control signal of a gate-on level to the plurality of switching transistors EMT during the electromagnetic sensing period. 
     The common voltage line VCL may be disposed along the periphery of the touch peripheral area TOA. The common voltage line VCL may extend to the first touch pad unit TP 1  via the upper side, the left side, and the lower side of the touch peripheral area TOA. The number of common voltage lines VCL is not limited to that illustrated in  FIG.  5   . The common voltage line VCL may supply a common voltage to the driving electrodes TE and the sensing electrodes RE during the electromagnetic sensing period. For example, the common voltage of the common voltage line VCL may be the same as the common voltage supplied to the display unit DU, but is not limited thereto. As another example, the common voltage of the common voltage line VCL may have a constant potential. As another example, the common voltage of the common voltage line VCL may be a sine wave, a pulse wave, or a ramp wave having a predetermined frequency. 
     In the case that the sensing lines RL are disposed on the left side of the touch peripheral area TOA and the driving lines TL are disposed on the right side of the touch peripheral area TOA, a portion of the common voltage line VCL and the second switching transistors EMT 2  may be disposed on the right side of the touch peripheral area TOA. 
     The display pad area DPA the first touch pad area TPA 1 , and the second touch pad area TPA 2  may be disposed at the edge of the sub-region SBA. The display pad area DPA, the first touch pad area TPA 1 , and the second touch pad area TPA 2  may be electrically connected to the circuit board  300  by using a low-resistance high-reliability material such as an anisotropic conductive film or self assembly anisotropic conductive paste (SAP). 
     The first touch pad area TPA 1  may be disposed on one side of the display pad area DPA, and may include a plurality of first touch pad units TP 1 . The plurality of first touch pad units TP 1  may be electrically connected to the touch driver  400  disposed on the circuit board  300 . The plurality of first touch pad units TP 1  may supply a driving signal to the plurality of driving electrodes TE through a plurality of driving lines TL. The plurality of first touch pad units TP 1  may supply a common voltage to the driving electrodes TE and the sensing electrodes RE through the common voltage line VCL during the electromagnetic sensing period. 
     The second touch pad area TPA 2  may be disposed on the other side of the display pad area DPA, and may include a plurality of second touch pad units TP 2 . The plurality of second touch pad units TP 2  may be electrically connected to the touch driver  400  disposed on the circuit board  300 . The touch driver  400  may receive a sensing signal through a plurality of sensing lines RL connected to the plurality of second touch pad units TP 2 , and may sense a change in mutual capacitance between the driving, electrode TE and the sensing electrode RE. 
     As another example, the touch driver  400  may supply a driving signal to each of the plurality of driving electrodes TE and the plurality of sensing electrodes RE, and may receive a sensing signal from each of the plurality of driving electrodes TE and the plurality of sensing electrodes RE. The touch driver  400  may sense an amount of change in electric charge of each of the plurality of driving electrodes TE and the plurality of sensing electrodes RE based on the sensing signal. 
       FIG.  6    is an enlarged view of area A 1  of  FIG.  5   , and  FIG.  7    is an enlarged view illustrating a part of a display device according to an embodiment of the present disclosure. 
     Referring to  FIGS.  6  and  7   , the plurality of driving electrodes TE, the plurality of sensing electrodes RE, and the plurality of dummy electrodes DME may be disposed on the same layer and may be spaced apart from each other. 
     The plurality of driving electrodes TE may be spaced apart from each other in the X-axis direction and the Y-axis direction. The driving electrodes TE adjacent in the Y-axis direction may be electrically connected through a bridge electrode CE. 
     The plurality of bridge electrodes CE may be disposed on a different layer from the driving electrode TE and the sensing electrode RE. The bridge electrode CE may include a first portion CEa and a second portion CEb. For example, the first portion CEa of the bridge electrode CE may be connected to the driving electrode TE disposed on one side through a first contact hole CNT 1  and extend in a third direction DR 3 . The second portion CEb of the bridge electrode CE may be bent from the first portion CEa in an area overlapping the sensing electrode RE to extend in a second direction DR 2 , and may be connected to the driving electrode TE disposed on the other side through the first contact hole CNT 1 . Hereinafter, a first direction DR 1  may be a direction between the X-axis direction and the Y-axis direction, a second direction DR 2  may be a direction between the opposite direction of the Y-axis and the X-axis direction, a third direction DR 3  may be an opposite direction of the first direction DR 1 , and a fourth direction DR 4  may be an opposite direction of the second direction DR 2 . Accordingly, each of the plurality of bridge electrodes CE may connect the adjacent driving electrodes TE in the Y-axis direction. 
     The plurality of sensing electrodes RE may extend in the X-axis direction and may be spaced apart from each other in the Y-axis direction. The sensing electrodes RE adjacent in the X-axis direction may be electrically connected through a connection portion RCE. For example, the connection portion RCE of the sensing electrodes RE may be disposed within the shortest distance between the driving electrodes TE adjacent to each other. 
     For example, the plurality of driving electrodes TE, the plurality of sensing electrodes RE, and the plurality of dummy electrodes DME may be formed in a planar mesh structure or a mesh structure. The plurality of driving electrodes TE, the plurality of sensing electrodes RE, and the plurality of dummy electrodes DME may surround each of first to third emission areas EA 1 , EA 2 , and EA 3  of a pixel group PG in plan view. Accordingly, the plurality of driving; electrodes TE, the plurality of sensing electrodes RE, and the plurality of dummy electrodes DME may not overlap first, second and third emission areas EA 1 , EA 2 , and EA 3 . The plurality of bridge electrodes CE may also not overlap the first to third emission areas EA 1 , EA 2 , and EA 3 . Accordingly the display device  10  may prevent the luminance of light conned from the first to third emission areas EA 1 , EA 2 , and EA 3  from being reduced by the touch sensing unit TSU. 
     Each of the plurality of driving electrodes TE may include a first portion TEa extending in the first direction DR 1  and a second portion TEb extending in the second direction DR 2 ., Each of the plurality of sensing electrodes RE may include a first portion REa extending in the first direction DR 1  and a second portion REb extending in the second direction DR 2 . 
     The plurality of pixels may include first, second and third sub-pixels, and each of the first to third sub-pixels may include the first to third emission areas EA 1 , EA 2 , and EA 3 . For example, the first emission area EA 1  may emit light of a first color or red light, the second emission area EA 2  may emit light of a second color or green light, and the third emission area EA 3  may emit light of a third color or blue light, but is not limited thereto. 
     One pixel group PG may represent a white gray scale by including one first emission area EA 1 , two second emission areas EA 2 , and one third emission area EA 3 , but the configuration of the pixel group PG is not limited thereto. The white gray scale may be represented by a combination of light emitted from one first emission area EA 1 , light emitted from two second emission areas EA 2 , and light emitted from one third emission area EA 3 . 
       FIG.  8    is a cross-sectional view taken along line I-I′ of  FIG.  7   . 
     Referring to  FIG.  8   , the display panel  100  may include the display unit. DU and the touch sensing unit TSU. The display unit DU may include the substrate SUB, the thin film transistor layer TFTL, the light emitting element layer EML, and the encapsulation layer TFEL. 
     The substrate SUB may be a base substrate or a base member. The substrate SUB may be a flexible substrate which can be bent, folded or rolled. For example, the substrate SUB may include an insulating material such as a polymer resin such as polyimide (PI), but the present disclosure is not limited thereto. As another example, the SUB may include a glass material or a metal material. 
     The thin film transistor layer TFTL may include a first buffer layer BF 1 , a light blocking layer BML, a second buffer layer BF 2 , a thin film transistor TFT, a gate insulating layer GL, a first interlayer insulating layer ILD 1 , a capacitor electrode CPE, a second interlayer insulating layer ILD 2 , a first anode connection electrode ACN 1 , a first passivation layer PAS 1 , a second anode connection electrode ACN 2 , and a second passivation layer PAS 2 . 
     The first buffer layer BF 1  may be disposed on the substrate SUB. The first buffer layer BF 1  may include an inorganic layer capable of preventing penetration of air or moisture, For example, the first buffer layer BF 1  may include a plurality of inorganic layers alternately stacked. 
     The light blocking layer BML may be disposed on the first buffer layer BF 1 . For example, the light blocking layer BML may be formed as a single layer or multiple layers made of any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd) and copper (Cu) or an alloy thereof. As another example, the light blocking layer BML may be an organic layer including a black pigment. 
     The second buffer layer BF 2  may be disposed on the first buffer layer BF 1  and the light blocking layer BML. The light blocking layer BML may be sandwiched between the first and second buffer layers BF 1  and BF 2 . The second buffer layer BF 2  may include an inorganic layer capable of preventing penetration of air or moisture For example, the second buffer layer BF 2  may include a plurality of inorganic layers alternately stacked. 
     The thin film transistor TFT may be disposed on the second buffer layer BF 2 , and may constitute a pixel circuit of each of a plurality of pixels. For example, the thin film transistor TFT may be a switching transistor or a driving transistor of the pixel circuit. The thin film transistor TFT may include a semiconductor region ACT, a source electrode SE, a drain electrode DE, and a gate electrode GE. 
     The semiconductor region ACT, the source electrode SE, and the drain electrode DE may be disposed on the second butler layer BF 2 . The semiconductor region ACT, the source electrode SE, and the drain electrode DE may overlap the light blocking layer BML in a thickness direction. The semiconductor region ACT may overlap the gate electrode GE in the thickness direction, and may be insulated from the gate electrode GE by the gate insulating layer GL. The source electrode SE and the drain electrode DE may be formed by making a material of the semiconductor region ACT conductive. 
     The gate electrode GE may be disposed on the gate insulating layer GL. The gate electrode GE may overlap the semiconductor region ACT with the gate insulating layer GI interposed therebetween. 
     The gate insulating layer GI may be disposed on the semiconductor region ACT, the source electrode SE, and the drain electrode DE. For example, the gate insulating layer GI may cover the semiconductor region ACT, the source electrode SE, the drain electrode DE, and the second buffer layer BF 2 , and may insulate the semiconductor region ACT from the gate electrode GE. The gate insulating layer GI may include a contact bole through which the first anode connection electrode ACN 1  passes. The contact hole may expose a portion of the drain electrode DE. 
     The first interlayer insulating layer ILD 1  may be disposed on the gate electrode GE and the gate insulating layer GI. The first interlayer insulating layer ILD 1  may include a contact hole through which the first anode connection electrode ACN 1  passes. The contact hole of the first interlayer insulating layer ILD 1  may be connected to the contact hole of the gate insulating layer GI and the contact hole of the second interlayer insulating layer ILD 2 . 
     The capacitor electrode CPE may be disposed on the first interlayer insulating layer ILD 1 . The capacitor electrode CPE may overlap the gate electrode GE in the thickness direction. The capacitor electrode CPE and the gate electrode GE may form a capacitance. In this case, the capacitor electrode CPE and the gate electrode GE may correspond to two terminals of a capacitor. 
     The second interlayer insulating layer ILD 2  may be disposed on the capacitor electrode CPE and the first interlayer insulating layer ILD 1 . The second interlayer insulating layer ILD 2  may include a contact hole through which the first anode connection electrode ACN 1  passes. The contact hole of the second inter layer insulating layer ILD 2  may be connected to the contact hole of the first interlayer insulating layer ILD 1  and the contact hole of the gate insulating layer GI. 
     The first anode connection electrode ACN 1  may be disposed on the second interlayer insulating layer ILD 2 . The first anode connection electrode ACN 1  may connect the drain electrode DE of the thin film transistor TFT to the second anode connection electrode ACN 2 . The first anode connection electrode ACN 1  may be inserted into a contact hole provided in the second interlayer insulating layer ILD 2 , the contact hole provided in the first interlayer insulating layer ILD 1 , and the contact hole provided in the gate insulating layer GI to be in contact with the drain electrode DE of the thin film transistor TFT. 
     The first passivation layer PAS 1  may be disposed on the first anode connection electrode ACN 1  and the second interlayer insulating layer ILD 2 . The first passivation layer PAS 1  may protect the thin film transistor TFT. The first passivation layer PAS 1  may include a contact hole through which the second anode connection electrode ACN 2  passes. 
     The second anode connection electrode ACN 2  may be disposed on the first passivation layer PAS 1 . The second anode connection electrode ACN 2  may connect the first anode connection electrode ACN 1  to a pixel electrode AND of light emitting element LED. The second anode connection electrode ACN 2  may be inserted into a contact hole provided in the first passivation layer PAS 1  to be in contact with the first anode connection electrode ACN 1 . 
     The second passivation layer PAS 2  may be disposed on the second anode connection electrode ACN 2  and the first passivation layer PAS 1 . The second passivation layer PAS 2  may include a contact hole through which the pixel electrode AND of the light emitting element LED passes. 
     The light emitting element layer EML may be disposed on the thin film transistor layer TFTL. The light emitting element layer EML may include the light emitting element LED and a pixel defining layer PDL. The light emitting element LED may include the pixel electrode AND, a light emitting layer EL, and a common electrode CAT. 
     The pixel electrode AND may be disposed on the second passivation layer PAS 2 . The pixel electrode AND may be disposed to overlap one of the first to third emission areas EA 1 , EA 2 , and EA 3  defined by the pixel defining layer PDL. The pixel electrode AND may be connected to the drain electrode DE of the thin film transistor TFT through the first and second anode connection electrodes ACN 1  and ACN 2 . 
     The light emitting layer EL may be disposed on the pixel electrode AND. For example, the light emitting layer EL may be an organic light emitting layer made of an organic material, but is not limited thereto. In the case of employing the organic light emitting layer as the light emitting layer EL, the thin film transistor TFT applies a predetermined voltage to the pixel electrode AND of the light emitting element LED, and if the common electrode CAT of the light emitting element LED receives a common voltage or a cathode voltage, holes and electrons can move to the light emitting layer EL through a hole transport layer and an electron transport layer and combine to produce light to be emitted by the light emitting layer EL. 
     The common electrode CAT may be arranged on the light emitting layer EL. For example, the common electrode CAT may be an electrode common to all of the pixels rather than individually specific to each of the pixels. The common electrode CAT may be disposed on the light emitting layer EL in the first to third emission areas EA 1 , EA 2 , and EA 3 , and may be disposed on the pixel defining layer PDL in an area other than the first to third emission areas EA 1 , EA 2 , and EA 3 . For example, the common electrode CAT may be disposed on the pixel defining layer PDL between the second and third emission areas EA 2  and EA 3 . 
     The common electrode CAT may receive the common voltage or a low potential voltage. When the pixel electrode AND receives a voltage corresponding to the data voltage and the common electrode CAT receives the common voltage, a potential difference is formed between the pixel electrode AND and the common electrode CAT, so that the light emitting layer EL may emit light. 
     The pixel defining layer PDL may define the first to third emission areas EA 1 , EA 2 , and EA 3 . The pixel defining layer PDL may separate and insulate the pixel electrode AND of each of the plurality of light emitting elements ED. 
     The encapsulation layer TFEL may be disposed on the common electrode CAT to cover the plurality of light emitting elements LED. The encapsulation layer TFEL may include at least one inorganic layer to prevent oxygen or moisture from penetrating into the light emitting element layer EML. The encapsulation layer TFEL may include at least one organic layer to protect the light emitting element layer EML from foreign matters such as dust. 
     The touch sensing unit TSU may be disposed on the encapsulation layer TFEL. The touch sensing unit TSU may include a third buffer layer BF 3 , the bridge electrode CE, a first insulating layer SIL 1 , the driving electrode TE, the sensing electrode RE, and a second insulating layer SIL 2 . 
     The third buffer layer BF 3  may be disposed on the encapsulation layer TFEL. The third buffer layer BF 3  may have an insulating and optical function. The third buffer layer BF 3  may include at least one inorganic layer. Optionally, the third buffer layer BF 3  may be omitted. 
     The bridge electrode CE may be disposed on the third buffer layer BF 3 . The bridge electrode CE may be disposed on a different layer from the driving electrode TE and the sensing electrode RE, and may connect the adjacent driving electrodes TE in the Y-axis direction. 
     The first insulating layer SIL 1  may be disposed on the bridge electrode CE and the third buffer layer BF 3 . The first insulating layer SIL 1  may have an insulating and optical function. For example, the first insulating layer SIL 1  may be an inorganic layer containing at least one of a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer. 
     The driving electrode TE and the sensing electrode RE may be disposed on the first insulating layer SIL 1 . Each of the driving electrode TE and the sensing electrode RE may not overlap the first to third emission areas EA 1 , EA 2 , and EA 3 . For example, each of the driving electrode TE and the sensing electrode RE may overlap the pixel defining layer FOIL Each of the driving electrode TE and the sensing electrode RE may be formed of a single layer containing molybdenum (Mo), titanium (Ti), copper (Cu), aluminum (Al), or indium tin oxide (ITO), or may be formed to have a stacked structure (Ti/Al/Ti) of aluminum and titanium, a stacked structure (ITO/Al/ITO) of aluminum and ITO, an Ag—Pd—Cu (APC) alloy, or a stacked structure (ITO/APC/ITO) of APC alloy and ITO. 
     The second insulating layer SIL 2  may be disposed on the driving electrode TE, the sensing electrode RE, and the first insulating layer SIL 1 . The second insulating layer SIL 2  may have an insulating and optical function. The second insulating layer SIL 2  may be made of the material used in association with the first insulating layer SIL 1 . 
       FIG.  9    is a cross-sectional view illustrating a display area and a non-display area in a display device according to au embodiment of the present disclosure. The cross-sectional view of  FIG.  9    further includes a non-display area in the cross-sectional view of  FIG.  8   , and the same configuration as the above-described configuration will be briefly described or omitted. 
     Referring to  FIG.  9   , the non-display au NDA and the touch peripheral area TOA may include the plurality of switching transistors EMT and the common voltage line VCL. The plurality of switching transistors EMT may include a first switching transistor EMT 1  and a second switching transistor EMT 2 .  FIG.  9    illustrates an example of the second switching transistor EMT 2 , but the first switching transistor EMT 1  may also be formed in the same manner as the second switching transistor EMT 2 . 
     The second switching transistor EMT 2  may be disposed on the second buffer layer BF 2  and may be connected between the sensing electrodes RE and the common voltage line VCL. The second switching transistor EMT 2  may be disposed on the same layer as the thin film transistor TFT of the display unit DU. The second switching transistor EMT 2  may include the semiconductor region ACT, the drain electrode DE, the source electrode SE, and the gate electrode GE. 
     The semiconductor region ACT, the drain electrode DE, and the source electrode SE may be arranged on the second buffer layer BF 2 . The semiconductor region ACT, the drain electrode DE, and the source electrode SE may overlap the light blocking layer BML in a thickness direction. The semiconductor region ACT may overlap the gate electrode GE in the thickness direction, and may be insulated from the gate electrode GE by the gate insulating layer GI. The drain electrode DE and the source electrode SE may be formed by making a material of the semiconductor region ACT conductive. 
     The gate electrode GE may be disposed on the gate insulating layer GI. The gate electrode GE may overlap the semiconductor region ACT with the gate insulating layer GI interposed therebetween. 
     A first connection electrode CNE 1  may be disposed on the second interlayer insulating layer ILD 2 . The first connection electrode CNE 1  may be disposed on the same layer as the first anode connection electrode ACN 1  and the common voltage line VCL. The first connection electrode CNE 1  may connect the drain electrode DE of the second switching transistor EMT 2  to a second connection electrode CNE 2 . The first connection electrode CNE 1  may be inserted into a contact hole provided in the second interlayer insulating layer ILD 2 , the first interlayer insulating layer ILD 1 , and the gate insulating layer GI to be in contact with the drain electrode DE of the second switching transistor EMT 2 . 
     The second connection electrode CNE 2  may be disposed on a first metal layer YML 1  of the touch sensing unit TSU. The first metal layer YML 1  may include the bride electrode CE and the second connection electrode CNE 2 . The second connection electrode CNE 2  may be inserted into a contact hole provided in the third buffer layer BF 3 , the second protection layer PAS 2 , and the first passivation layer PAS 1  to be in contact with the first connection electrode CNE 1 . 
     The driving electrode TE and the sensing electrode RE may be disposed on a second metal layer YML 2  of the touch sensing unit TSU. The sensing electrode RE disposed on the left side of the touch sensor area TSA may extend to the touch peripheral area TOA, and may be inserted into a second contact hole CNT 2  provided in the first insulating layer SIL 1  to be in contact with the second connection electrode CNE 2 . Accordingly, the sensing electrode RE may be electrically connected to the drain electrode DE of the second switching transistor EMT 2  through the first and second connection electrodes CNE 1  and CNE 2 . 
     The common voltage line VCL may be disposed on the second interlayer insulating layer ILD 2 . The common voltage line VCL may be disposed on the same layer as the first connection electrode CNE 1  and the first anode connection electrode ACN 1 . The common voltage line VCL may extend to the first touch pad unit TP 1  via the outer edge of the touch peripheral area TOA. The common voltage line VCL may supply a common voltage to the sensing electrode RE through the second switching transistor EMT 2  turned on during the electromagnetic sensing period. Here, the common voltage of the common voltage line VCL may be the same as the common voltage supplied to the common electrode CAT of the display unit DU, but is not limited thereto. 
     As another example, the common voltage line VCL may be disposed on the first metal layer YML 1  or the second metal layer YML 2  of the touch sensing unit TSU. In this case, the common voltage line VCL may be electrically connected to the source electrode SE of the second switching transistor EMT 2  through at least one connection electrode. 
       FIG.  10    is a view illustrating a sensing driving process and the charging of an input member in a sensing system according to an embodiment of the present disclosure, and  FIG.  11    is a view illustrating the discharging of an input member and the input sensing process in the sensing system according to an embodiment of the present disclosure.  FIG.  12    is a waveform diagram illustrating a plurality of first driving signals, a plurality of second driving signals, a control signal, an electromotive force of an input member, and a differential sensing signal in a sensing system according to an embodiment of the present disclosure. 
     Referring to  FIGS.  10  to  12   , the sensing system may include the display device  10  and the input member  20 . The display device  10  may include the display panel  100 , the display driver  200 , the circuit board  300 , and the touch driver  400 . 
     The touch driver  400  may include a driving signal supply unit  410 , a sensing signal receiving unit  420 , a switching unit  430 , and a control unit  450 . 
     The driving signal supply unit  410  may be electrically connected to the plurality of driving electrodes TE through the switching unit  430  and the driving line TL. The driving signal supply unit  410  may supply a first driving signal TDS to the plurality of driving electrodes TE during the charging period of the electromagnetic sensing period EMR. For example, the driving signal supply unit  410  may supply a first driving signal TDS to some of the plurality of driving electrodes TE. As another example, the driving signal supply unit  410  may sequentially supply the first driving signal TDS to the plurality of driving electrodes TE. The first driving signal TDS may be a signal having a plurality of driving pulses. The first driving signal TDS may be a sine wave, a pulse wave, or a ramp wave having a predetermined frequency, but is not limited thereto. The frequency of the first driving signal TDS may correspond to a resonant frequency of the input member  20 . For example, the frequency of the first driving signal TDS may be the same as a resonant frequency of a resonant circuit unit  22  of the input member  20 , but is not limited thereto. The touch driver  400  may sense the touch of the input member  20  by receiving a signal of a specific frequency by the touch of the input member  20 . 
     The driving signal supply unit  410  may include a first driving signal output module  411  and a second driving signal output module  412 . The first driving signal output module  411  may supply a first-first driving signal TDS 1  haying a first phase to a first driving electrode TE 1 . through a first driving line TL 1  during the charging period of the electromagnetic sensing period EMR. The first driving electrode TE 1  may be a driving electrode disposed to one side of a specific point PT among the plurality of driving electrodes TE. The second driving signal output module  412  may supply a first-second driving signal TDS 2  having a second phase opposite to the first phase to a second driving electrode TE 2  through a second driving line TL 2  during the charging period of the electromagnetic sensing period EMR. A difference between the first phase and the second phase may be 180 degrees. The second driving electrode TE 2  may be a driving electrode disposed to the other side of the specific point PT among the plurality of driving electrodes TE. For example, the second driving electrode TE 2  may be disposed adjacent to the first driving electrode TE 1 . As another example, the second driving electrode TE 2  may be spaced apart from the first driving electrode TE 1  with at least one driving electrode TE interposed therebetween. 
     For example, when the first driving electrode TE 1  receives the first-first driving signal TDS 1  having the first phase, a current I may flow in the Y-axis direction and a magnetic field may be generated clockwise with respect to the Y-axis direction. When the second driving electrode TE 2  receives the first-second driving signal TDS 2  having the second phase opposite to the first phase, a current I may flow in a direction opposite to the Y-axis direction, and a magnetic field may be generated counterclockwise with respect to the Y-axis direction. Accordingly, the directions of the magnetic fields of the first driving electrode TE 1  and the second driving electrode TE 2  may coincide at the specific point PT, and thus, according to constructive interference of the magnetic fields, a magnetic field VMF may be generated in the third direction (Z-axis direction). 
     The input member  20  may be a stylus pen that supports an electromagnetic resonance method by using the driving electrode TE or the sensing electrode RE. The input member  20  may output a radio frequency signal in response to a magnetic field or electromagnetic signal of the touch sensing unit TSU. 
     The input member  20  may include a conductive tip  21  and the resonant circuit unit  22 . The conductive tip  21  may be disposed on one end of the input member  20 . The conductive tip  21  may form a capacitance with at least one of the plurality of touch electrodes SEN when the input member  20  touches the touch sensing unit TSU. The conductive tip  21  may be a dielectric including a metal material or conductive rubber, but is not limited thereto. 
     The resonant circuit unit  22  may include a coil L 1  and a capacitor C 1 . The coil L 1  may receive the magnetic field VMF formed in the third direction (Z-axis direction) induced by the touch sensing unit TSU to generate an induced current, The induced current flowing through the resonant circuit unit  22  may charge the capacitor C 1 . For example, an LC resonant frequency of the input member  20  may be determined based on the capacitance of the capacitor C 1  and the inductance of the coil L 1 . 
     The input member  20  may be charged during the charging period of the electromagnetic sensing period EMR. When the input member  20  is adjacent to or in contact with the specific point PT, the input member  20  may receive the magnetic field VMF formed in the third direction (Z-axis direction) induced from the current I flowing through the first and second driving electrodes TE 1  and TE 2  during the charging period of the electromagnetic sensing period EMR. The coil L 1  of the input member  20  may generate an induced current, and the induced current may charge the capacitor C 1 . Accordingly, the electromotive force EMF of the capacitor C 1  may increase during the charging period of the electromagnetic sensing period EMR. 
     The input member  20  may be discharged during the discharging period of the electromagnetic sensing period EMR. When the input member  20  is adjacent to or in contact with the specific point PT, if the supply of the magnetic field VMF formed in the third direction (Z-axis direction) is stopped by the interruption of the supply of the first-first and first-second driving signals TDS 1  and TDS 2 , the capacitor C 1  may be discharged. Accordingly, a current may flow in the coil L 1  in a direction opposite to that of the induced current, and the coil L 1  may generate the magnetic field VMF passing through the specific point PT in a direction opposite to the third direction (Z-axis direction). The electromotive force EMF of the capacitor C 1  may decrease during the discharging period of the electromagnetic sensing period EMR. 
     For example, when the magnetic field VMF passes through the specific point PT in a direction opposite to the third direction (Z-axis direction), a magnetic field may be generated counterclockwise with respect to the Y-axis direction around the first driving electrode TE 1 , and the current I of the first driving electrode TE 1  may flow in a direction opposite to the Y-axis direction. Accordingly, the first driving electrode TE 1  may provide a first sensing signal having a first phase to the touch driver  400 . When the magnetic field VMF passes through the specific point PT in a direction opposite to the third direction (Z-axis direction), a magnetic field may be generated clockwise with respect to the Y-axis direction around the second driving electrode TE 2 , and the current I of the second driving electrode TE 2  may flow in the Y-axis direction. Accordingly, the second driving electrode TE 2  may provide a second sensing signal having a second phase opposite to the first phase to the touch driver  400 . 
     The sensing signal receiving unit  420  may be connected to the plurality of driving, electrodes TE through the switching unit  430  and the driving line TL. The sensing signal receiving unit  420  may receive sensing signals of the plurality of driving electrodes TE through the driving line TL during the discharging period of the electromagnetic sensing period EMR. The sensing signal receiving unit  420  may be a differential amplifier. The sensing signal receiving unit  420  may differentially amplify the plurality of sensing signals to output a differential sensing signal SER. Here, differential amplification refers to amplifying a voltage difference between two input signals. Accordingly, the sensing signal receiving unit  420  may amplify a voltage difference between the plurality of sensing signals to output the differential sensing signal SER. 
     The sensing signal receiving unit  420  may include a first input terminal  421 , a second input terminal  422 , and an output terminal  423 . When the input member  20  is adjacent to or in contact with the specific point PT, the first input terminal  421  may receive the first sensing signal having the first phase from the first driving electrode TE 1  through the first driving line TL 1 , and the second input terminal  422  may receive the second sensing signal having the second phase opposite to the first phase from the second driving electrode TE 2  through the second driving line TL 2 . The sensing signal receiving unit  420  may amplify a difference between the first and second sensing signals to output the differential sensing signal SER through the output terminal  423 . The sensing signal receiving unit  420  may cancel (e.g., remove) noise included in the first and second sensing signals, and may amplify a difference between the first and second sensing signals to improve touch sensitivity. 
     The switching unit  430  may selectively connect the driving line TL to one of the driving signal supply unit  410  and the sensing signal receiving unit  420 . The switching unit  430  may connect the driving signal supply unit  410  to the driving line TL during the charging period of the input member  20 . The switching unit  430  may connect the sensing signal receiving unit  420  to the driving line TL during the discharging period of the input member  20 . For example, the switching unit  430  may periodically connect each of the driving signal supply unit  410  and the sensing signal receiving unit  420  to the driving line TL. As another example, the switching unit  430  may connect each of the driving signal supply unit  410  and the sensing signal receiving unit  420  to the driving line TL based on a switching control signal of the control unit  450 . 
     The switching unit  430  may include a first switching unit  431  and a second switching unit  432 . The first switching unit  431  may connect the first driving signal output module  411  to the first driving line TL 1  during the charging period of the electromagnetic sensing period EMR. The first driving signal output module  411  may supply the first-first driving signal TDS 1  to the first driving electrode TE 1  during the charging period of the electromagnetic sensing period EMR. 
     The first switching unit  431  may connect the first input terminal  421  of the sensing signal receiving unit  420  to the first driving line TL 1  during the discharging period of the electromagnetic sensing period EMR. The first input terminal  421  may receive the first sensing signal from the first driving electrode TE 1  during the discharging period of the electromagnetic sensing period EMR. 
     The second switching unit  432  may connect the second driving signal output module  412  to the second driving line TL 2  during the charging period of the electromagnetic sensing period EMR. The second driving signal output module  412  may supply the first-second driving signal TDS 2  to the second driving electrode TE 2  during the charging period of the electromagnetic sensing period EMR. 
     The second switching unit  432  may connect the second input terminal  422  of the sensing signal receiving unit  420  to the second driving line TL 2  during the discharging period of the electromagnetic sensing period EMR. The second input terminal  422  may receive the second sensing signal from the second driving electrode TE 2  during the discharging period of the electromagnetic sensing period EMR. 
     The control unit  450  may control the operation of the driving signal supply unit  410 , the sensing signal receiving unit  420 , and the switching unit  430 . The control unit  450  may control the operation timing of the driving signal supply unit  410 , the sensing signal receiving unit  420 , and the switching unit  430  during the charging period and the discharging period of the electromagnetic sensing period EMR. For example, the controller  450  may receive the differential sensing signal SER and determine whether the input of the input member  20  has been made at the specific point PT. As another example, the control unit  450  may receive a plurality of differential sensing signals SER to determine the input coordinates of the input member  20 . When the frequency of the differential sensing signal SER corresponds to a preset frequency band, the control unit  450  may determine that the input member  20  has been touched, but the present disclosure is not limited thereto. 
     Accordingly, the touch driver  400  may supply the first-first and first-second driving signals TDS 1  and TDS 2  having opposite phases to the first and second driving electrodes TE 1  and TE 2  disposed to both sides of the specific point PT, respectively, to generate the magnetic field VMF in the third direction (Z-axis direction) by constructive interference of magnetic fields, thereby charging the input member  20 . The touch driver  400  may differentially amplify the first and second sensing signals induced based on the magnetic field VMF in an opposite direction of the third direction (Z-axis direction) according to the discharge of the input member  20  to output the differential sensing signal SER and may determine whether the input of the input member  20  has been made. 
     Each of the first and second driving electrodes TE 1  and TE 2  may be connected to the common voltage line VCL through the first switching transistor EMT 1  during the electromagnetic sensing period EMR. The electromagnetic control line ECL may supply a control signal ECS of the gate-on level to a plurality of first switching transistors EMT 1  during the electromagnetic sensing period EMR. For example, one end of the driving electrodes TE connected to the driving line TL may correspond to the driving electrode TE disposed on the lower side of the touch sensor area TSA in  FIG.  5   , and the other end of the driving electrode TE connected to the first switching transistor EMT 1  may correspond to the driving electrode TE disposed on the upper side of the touch sensor area TSA in  FIG.  5   . The common voltage line VCL may supply a common voltage to the other end of the driving electrodes TE disposed farthest from the driving line TL or the touch driver  400 , so that the potential of the other end of the driving electrodes TE may be stably maintained. Accordingly, the common voltage line VCL may supply a common voltage to the other end of the driving electrodes TE, so that the sensing sensitivity at the other end of the driving electrodes TE may be improved. The display device  10  may include the switching transistor EMT and the common voltage line VCL disposed in the touch peripheral area TOA, so that the reliability of the sensor may be secured over the entire area of the touch sensor area TSA. 
       FIGS.  10  to  12    illustrate the process of sensing the touch of the input member  20  using the plurality of driving electrodes TE, but the display device  10  may supply the second driving signal RDS to the plurality of sensing electrodes RE in the same manner to sense the touch of the input member  20 . 
     The touch driver  400  may sense the input of the user&#39;s body dining the first period and sense the input of the input member  20  during the second period. For example, the first period may be a touch sensing period FTS, and the second period may be an electromagnetic sensing period EMR. 
     The touch driver  400 , during the self-capacitance sensing period Self-Cap of the touch sensing period FTS, may supply the plurality of first driving signals TDS to the plurality of driving electrodes TE, and may supply the plurality of second driving signals RDS to the plurality of sensing electrodes RE. The touch driver  400  may sense an amount of change of the self-capacitance of each of the plurality of driving electrodes TE and the plurality of sensing electrodes RE by receiving the sensing signal from each of the plurality of driving electrodes TE and the plurality of sensing electrodes RE during the self-capacitance sensing period Self-Cap of the touch sensing period FTS. 
     The touch driver  400  may supply the plurality of first driving signals TDS to the plurality of driving electrodes TE during the mutual capacitance sensing period Mutual-Cap of the touch sensing period FTS. The touch driver  400  may sense an amount of change of the mutual capacitance between the plurality of driving electrodes TE and the plurality of sensing electrodes RE by receiving the sensing signal from the plurality of sensing electrodes RE during the mutual capacitance sensing period Mutual-Cap of the touch sensing period FTS. 
     The electromagnetic control line ECL may supply the control signal ECS of the gate-off level to the plurality of switching transistors EMT during the touch sensing period FTS. Accordingly, the plurality of switching transistors EMT may be turned off during the touch sensing period FTS. 
     The display device  10  may sense the touch of the input member  20  by using the touch sensing unit TSU that senses the touch of the user&#39;s body. The display device  10  may sense a touch of the user&#39;s body during the touch sensing period FTS using the touch sensing unit TSU, and may sense the approach or contact of the input member  20  such as an input pen during, the electromagnetic sensing, period EMR. Accordingly, the display device  10  may not include a separate sensor layer or a digitizer layer for the electromagnetic resonance of the input member  20 , so that the thickness of the display device  10  may be decreased, and the costs may be reduced. 
       FIG.  13    is a timing diagram illustrating the operation of a display driver and a touch driver in a display device according to an embodiment of the present disclosure. 
     Referring to  FIG.  13   , the display driver  200  may drive the display unit DU at a driving frequency of A Hz (A being a positive integer). In a plurality of display frame periods DFT 1 , DFT 2 , DFT 3 , and DFT 4 , the display driver  200  may supply a gate signal and a data voltage to the plurality of pixels during a display period DSP, and may stop the supply of the gate signal and the data voltage during a display standby period DW. Each of first, second, third and fourth display frame periods DFT 1 , DFT 2 , DFT 3 , and, DFT 4  may correspond to 1/a sec (a being a positive integer). For example, the display driver  200  may sequentially supply a gate signal to the pixels arranged along, a plurality of rows during the display period DSP in the first display frame period DFT 1 , and the plurality of pixels may display images in an order selected by the gate signal. The display driver  200  may not supply the gate signal and the data voltage to the plurality of pixels during the display standby period DW in the first display frame period DFT 1 , and voltages in the plurality of pixels may be initialized. 
     The touch driver  400  may be synchronized with the display driver  200  to drive the touch sensing unit TSU. The touch driver  400  may receive a timing control signal from a main processor or a main controller, and may be synchronized with the display driver  200 . For example, the touch driver  400  may drive the touch sensing unit TSU at a driving frequency of N times (N being a positive integer) the driving frequency of the display driver  200  but is not limited thereto. 
     The touch driver  400  may drive the touch sensing unit TSU at a driving frequency of B Hz (B being a positive integer). The touch driver  400  may drive the touch sensing unit TSU during a plurality of touch frame periods SFT 1 , SFT 2 , SFT 3 , SFT 4 , SFT 5 , SFT 6 , SFT 7  and SFT 8  determined by the driving frequency. The touch driver  400  may sense the touch of the user&#39;s body during a touch sensing period. FTS in a first touch frame period SFT 1 , may sense the touch of the input member  20  during the electromagnetic sensing period EMR in the first touch frame period SFT 1 , and may stop the supply of the drinking signal during a touch standby period WS in the first touch frame period SFT 1 . This may be repeated in each of the second to eighth frame periods SFT 1  to SFT 8 . 
     Referring to  FIG.  13    in conjunction with  FIG.  12   , the touch driver  400 , during the self-capacitance sensing period Self-Cap of the touch sensing period FTS, may supply the plurality of first driving signals TDS to the plurality of driving electrodes TE, and may supply the plurality of second driving signals RDS to the plurality of sensing electrodes RE. The touch driver  400  may sense an amount of change of the self-capacitance of each of the plurality of driving electrodes TE and the plurality of sensing electrodes RE by receiving the sensing signal from each of the plurality of driving electrodes TE and the plurality of sensing electrodes RE during the self-capacitance sensing period Self-Cap of the touch sensing period FTS. 
     The touch driver  400  may supply the plurality of first driving signals IDS to the plurality of driving electrodes TE during the mutual capacitance sensing period Mutual-Cap of the touch sensing period FTS. The touch driver  400  may sense an amount of change of the mutual capacitance between the plurality of driving electrodes TE and the plurality of sensing electrodes RE by receiving the sensing signal from the plurality of sensing electrodes RE during the mutual capacitance sensing period Mutual-Cap of the touch sensing period FTS. 
     The touch driver  400  may supply the first-first and first-second driving signals TDS 1  and TDS 2  and receive the first and second sensing signals during the electromagnetic sensing period EMR to determine whether the input of the input member  20  has been made. Accordingly, the touch driver  400  may sense both the input of the user&#39;s body and the input of the input member  20  during the first touch frame period SFT 1 . 
     The touch driver  400  may sequentially perform the touch sensing period FTS, the electromagnetic sensing period EMR, and the touch standby period WS during the first touch frame period SFT 1 , but the order of the touch method is not limited thereto. The length of the touch sensing period FTS may be greater than the length of the electromagnetic sensing period EMR, but the present disclosure is not limited thereto. 
       FIG.  14    is a graph illustrating the sensing sensitivity of a sensing system according to an embodiment of the present disclosure. 
     Referring to  FIG.  14   , when the plurality of switching transistors EMT are turned off (EMT off) during the electromagnetic sensing period EMR, the common voltage line VCL may not supply a common voltage to the driving electrodes TE and the sensing electrodes RE during the electromagnetic sensing period EMR. In this case, a sensing value by the touch electrodes SEN adjacent to the touch driver  400  may be relatively high (touch driver side), and a sensing value by the touch electrodes SEN spaced far apart from the touch driver  400  may be relatively low (VCL side). Accordingly, when the plurality of switching transistors EMT are turned off (EMT off) during the electromagnetic sensing period EMR, a difference in sensing sensitivity may occur according to the position of the touch electrodes SEN. The configuration in which the plurality of switching transistors EMT are turned off during the electromagnetic sensing period EMR (EMT off) may correspond to the configuration in which the touch sensing unit TSU does not include the plurality of switching transistors EMT and the common voltage line VCL. 
     When the plurality of switching transistors EMT are turned on (EMT on) during the electromagnetic sensing period EMR, the common voltage line VCL may supply a common voltage to the driving electrodes TE and the sensing electrodes RE during the electromagnetic sensing period EMR. In this case, a value sensed by the touch electrodes SEN spaced far apart from the touch driver  400  may be relatively increased (VCL side). Accordingly, when the plurality of switching transistors EMT are turned on (EMT on) during the electromagnetic sensing period EMR, the sensing sensitivity by the touch electrodes SEN adjacent to the common voltage line VCL (VCL side) may be improved. The display device  10  may include the switching transistor EMT and the common voltage line VCL disposed in the touch peripheral area TOA, so that the reliability of the sensor may be secured over the entire area of the touch sensor area TSA. 
       FIG.  15    is a plan view illustrating a touch sensing unit of a display device according to an embodiment of the present disclosure, and  FIG.  16    is a waveform diagram illustrating a plurality of first driving signals, a plurality of second driving signals, a first control signal, a second control signal, an electromotive force of an input member, and a differential sensing signal in a sensing system according to an embodiment of the present disclosure. The touch sensing unit TSU of  FIG.  15    has a different configuration of the common voltage line VCL and the electromagnetic control line in the touch sensing unit TSU of  FIG.  5   , and the same configuration as the above-described configuration for  FIG.  5    will be briefly described or omitted. 
     Referring to  FIGS.  15  and  16   , the touch sensor area TSA may include the plurality of touch electrodes SEN and the plurality of dummy electrodes DME, The plurality of touch electrodes SEN may include a plurality of driving electrodes TE and a plurality of sensing electrodes RE. 
     The touch peripheral area TOA may include the driving line TL, the sensing line RL, the plurality of switching transistors EMT, the electromagnetic control line ECL, and the common voltage line VCL. 
     The switching transistor EMT may be a switching element connected between the plurality of touch electrodes SEN and the common voltage line VCL. The plurality of switching transistors EMT may include a first switching transistor EMT 1  and a second switching transistor EMT 2 . The first switching transistor EMT 1  may be disposed on the upper side of the touch peripheral area TOA, The first switching transistor EMT 1  may be disposed on the opposite side of the driving line TL. The first switching transistor EMT 1  may be connected to the driving electrodes TE disposed fluffiest from the driving line TL. The first switching transistor EMT 1  may be disposed between the driving electrodes TE and the first common voltage line VCL 1  disposed on the upper side of the touch sensor area TSA. The first switching transistor EMT 1  may be turned on based on a first control signal ECS 1  of a first electromagnetic control line ECL 1 . In other words, the first switching transistor EMT 1  may be turned on in response to the first control signal ECS 1 . The first electromagnetic control line ECL 1  may supply the first control signal ECS 1  of the gate-on level to the plurality of first switching. transistors EMT 1  during a first electromagnetic sensing period EMR 1 . The first switching transistor EMT 1  may be turned off during the touch sensing period FTS and a second electromagnetic sensing period EMR 2 , and the driving electrodes TE may not receive a common voltage. The first switching transistor EMT 1  may be turned on during the first electromagnetic sensing period EMR 1  to supply a common voltage to the driving electrodes TE. 
     The second switching transistor EMT 2  may be disposed on the left side of the touch peripheral area TOA. In the alternative, the second switching transistor EMT 2  may be disposed on the right side of the touch peripheral area TOA when the sensing line RL is disposed on the left side of the touch peripheral area TOA, The second switching transistor EMT 2  may be disposed on the opposite side of the sensing line RL. The second switching transistor EMT 2  may be connected to the sensing electrodes RE disposed farthest from the sensing line RL. The second switching transistor EMT 2  may be disposed between the sensing electrodes RE and a second common voltage line VCL 2  disposed on the left side of the touch sensor area TSA. The second switching transistor EMT 2  may be turned on based on a second control signal ECS 2  of a second electromagnetic control line ECL 2 . In other words, the second switching transistor EMT 2  may be turned on in response to the second control signal ECS 2 . The second electromagnetic control line ECL 2  may supply the second control signal ECS 2  of the gate-on level to a plurality of second switching transistors EMT 2  during the second electromagnetic sensing period EMR 2 . The second switching transistor EMT 2  may be turned off during the touch sensing period FTS and the first electromagnetic sensing period EMR 1 , and the sensing electrodes RE may not receive a common voltage. The second switching transistor EMT 2  may be turned on during the second electromagnetic sensing period EMR 2  to supply a common voltage to the sensing electrodes RE. 
     The electromagnetic control line ECL may supply a control signal to the gate electrode of the plurality of switching transistors EMT The electromagnetic control line ECL may include the first and second electromagnetic control lines ECL 1  and ECL 2 . 
     The first electromagnetic control line ECL 1  may supply the first control signal ECS 1  to the gate electrode of the first switching transistor EMT 1 . The first electromagnetic control line ECL 1  may extend to the first touch pad unit TP 1  via the upper side, the left side, and the lower side of the touch peripheral area TOA. 
     The second electromagnetic control line ECL 2  may supply the second control signal ECS 2  to the gate electrode of the second switching transistor EMT 2 . The second electromagnetic control line ECL 2  may extend to the first touch pad unit TP 1  via the left side and the lower side of the touch peripheral area. TOA, In this configuration, the first and second switching transistors EMT 1  and EMT 2  may be independently controlled. 
     The common voltage line VCL may be disposed along the periphery of the touch peripheral area TOA. The common voltage line VCL may include the first and second common voltage lines VCL 1  and VCL 2 . The first common voltage line VCL 1  may be disposed closer to the edges of the touch peripheral area TOA than the second common voltage line VCL 2 . In addition, the first electromagnetic control line ECL 1  may be disposed between the first and second common voltage lines VCL 1  and VCL 2 . The first common voltage line VCL 1  may extend to the first touch pad unit TP 1  via the upper side, the left side, and the lower side of the touch peripheral area TOA. The first common voltage line VCL 1  may supply a common voltage to the driving electrodes TE during the first electromagnetic sensing period EMR 1 . The second common voltage Fine VCL 2  may extend to the first touch pad unit TP 1  via the left side and the lower side of the touch peripheral area TOA. The second common voltage line VCL 2  may supply a common voltage to the sensing electrodes RE during the second electromagnetic sensing period EMR 2 . For example, the common voltage of the first and second common voltage lines VCL 1  and VCL 2  and the common voltage supplied to the display unit. DU may be the same, but are not limited thereto. As another example, the common voltages of the first and second common voltage lines VCL 1  and VCL 2  may be different from each other. One common voltage of the first and second common voltage lines VCL 1  and VCL 2  may have a constant potential, and the other common voltage of the first and second common voltage lines VCL 1  and VCL 2  may be a sine wave, a pulse wave, or a ramp wave having a predetermined frequency. 
     The driving electrodes TE may be connected to the first common voltage line VCL 1  through the first switching transistor EMT 1  during the first electromagnetic sensing period EMR 1 . The first electromagnetic control line ECL 1  may supply the first control signal ECS 1  of the gate-on level to the plurality of first switching transistors EMT 1  during the first electromagnetic sensing period EMR 1 . The first common voltage line VCL 1  may supply a common voltage to the other end of the driving electrodes TE disposed farthest from the driving line TL or the touch driver  400 , so that the potential of the other end of the driving electrodes TE may be stably maintained. The first common voltage line VCL 1  may supply a common voltage to the other end of the driving electrodes TE, so that the sensing sensitivity at the other end of the driving electrodes TE may be improved. 
     The sensing electrodes RE may be connected to the second common voltage line VCL 2  through the second switching transistor EMT 2  during the second electromagnetic sensing period EMR 2 . The second electromagnetic control line ECL 2  may supply the second control signal ECS 2  of the gate-on level to a plurality of second switching transistors EMT 2  during the second electromagnetic sensing period EMR 2 . The second common voltage line VCL 2  may supply a common voltage to the other end of the sensing electrodes RE disposed farthest from the sensing line RL or the touch driver  400 , so that the potential of the other end of the sensing electrodes RE may be stably maintained. The second common voltage line VCL 2  may supply a common voltage to the other end of the sensing electrodes RE, so that the sensing sensitivity at the other end of the sensing electrodes RE may be improved. 
     Accordingly, the display device  10  may include the first and second switching transistors EMT 1  and EMT 2  and the first and second common voltage lines VCL 1  and VCL 2  disposed in the touch peripheral area TOA, so that the reliability of the sensor may be secured over the entire area of the touch sensor area TSA. 
     The touch driver  400 , during the self-capacitance sensing period Self-Cap of the touch sensing period FTS, may supply the plurality of first driving signals TDS to the plurality of driving electrodes TE, and may supply the plurality of second driving signals R DS to the plurality of sensing electrodes RE. The touch driver  400  may sense an amount of change of the self-capacitance of each of the plurality of driving electrodes TE and the plurality of sensing electrodes RE by receiving the sensing signal from each of the plurality of driving electrodes TE and the plurality of sensing electrodes RE during the self-capacitance sensing period Self-Cap of the touch sensing period FTS. 
     The touch driver  400  may supply the plurality of first driving signals TDS to the plurality of driving electrodes TE during the mutual capacitance sensing period Mutual-Cap of the touch sensing period FTS. The touch driver  400  may sense an amount of change of the mutual capacitance between the plurality of driving electrodes TE and the plurality of sensing electrodes RE by receiving the sensing signal from the plurality of sensing electrodes RE during the mutual capacitance sensing period Mutual-Cap of the touch sensing period FTS. 
     The first electromagnetic control line ECL 1  may supply the first control signal ECS 1  of the gate-off level to the first switching transistor EMT 1  during the touch sensing period FTS. The second electromagnetic control line ECL 2  may supply the second control signal ECS 2  of the gate-off level to the second switching transistor EMT 2  during the touch sensing period FTS. Accordingly, the first and second switching transistors EMT 1  and EMT 2  may be turned off during the touch sensing period FTS. 
     The display device  10  may sense the touch of the input member  20  by using the touch sensing unit TSU that senses the touch of the user&#39;s body. The display device  10  may sense a touch of the user&#39;s body during the touch sensing period FTS using the touch sensing unit TSU, and may sense the approach or contact of the input member  20  such as an input pen during the first and second electromagnetic sensing periods EMR 1  and EMR 2 . Accordingly, the display device  10  may not include a separate sensor layer or a digitizer layer for the electromagnetic resonance of the input member  20 , so that the thickness of the display device  10  may be decreased, and the costs may be reduced. 
       FIG.  17    is a plan view illustrating a touch sensing unit of a display device according to an embodiment of the present disclosure. The touch sensing unit TSU of  FIG.  17    has a different configuration of the voltage line VCL and the electromagnetic control line ECL by further including the extension line ETL in the touch sensing unit TSU of  FIG.  5   , and the same configuration as the above-described configuration for  FIG.  5    will be briefly described or omitted. 
     Referring to  FIG.  17   , the touch sensor area TSA may include a plurality of touch electrodes SEN and a plurality of dummy electrodes DME. The plurality of touch electrodes SEN may include a plurality of driving electrodes TE and a plurality of sensing electrodes RE. 
     The touch peripheral area TOA may include the driving line IL, the sensing line RL, the plurality of extension lines ETL, the plurality of switching transistors EMT, the electromagnetic control line ECL, and the common voltage line VCL. 
     The plurality of extension lines ETL may electrically connect the touch electrodes SEN to the plurality of switching transistors EMT. The plurality of extension lines ETL may include first and second extension lines ETL 1  and ETL 2 . The first extension line ETL 1  may be connected to the driving electrodes TE disposed on the upper side of the touch sensor area TSA. The first extension line ETL 1  may extend to the first switching transistor EMT 1  via the upper side and the left side of the touch peripheral area TOA. Accordingly, the first extension line ETL 1  may electrically connect the driving electrodes TE to the first switching transistor EMT 1 . Although  FIG.  17    shows four first extension lines ETL 1  this is merely an example and the number of first extension lines ETL 1  may correspond to the number of columns of driving electrodes TE in the touch peripheral area TOA. 
     The second extension line ETL 2  may be connected to the sensing electrodes RE disposed on the left side of the touch sensor area TSA. The second extension line ETL 2  may extend to the second switching transistor EMT 2  via the left side of the touch peripheral area TOA. Accordingly, the second extension line ETL 2  may electrically connect the sensing electrodes RE to the second witching transistor EMT 2 . Although  FIG.  17    shows four second extension lines ETL 2 , this is merely an example and the number of second extension lines ETL 2  may correspond to the number of row of sensing electrodes RE in the touch peripheral area TOA. 
     The switching transistor EMT may be a switching element connected between the plurality of touch electrodes SEN and the common voltage line VCL. The plurality of switching transistors EMT may include a first switching transistor EMT 1  and a second switching transistor EMT 2 . The first and second switching transistors EMT 1  and EMT 2  may be disposed in a line on the lower side of the touch peripheral area TOA. The first switching transistor EMT 1  ma be connected to the driving electrodes TE disposed farthest from the driving line TL through the first extension line ETL 1 . The first switching transistor EMT 1  may be electrically connected between the driving electrodes TE and the common voltage line VCL disposed on the upper side of the touch sensor area TSA. The first switching transistor EMT 1  may be turned on based on the control signal ECS of the electromagnetic control line ECL. The electromagnetic control line ECL may supply a control signal ECS of the gate-on level to a plurality of first switching transistors EMT 1  during the electromagnetic sensing period EMR. The first switching transistor EMT 1  may be turned off during the touch sensing period FTS, and the driving electrodes TE may not receive a common voltage. The first switching transistor EMT 1  may be turned on during the electromagnetic sensing period EMR to supply a common voltage to the driving electrodes TE. 
     The second switching transistor EMT 2  may be connected to the sensing electrodes RE disposed farthest from the sensing line RL through the second extension line ETL 2 . The second switching transistor EMT 2  may be electrically connected between the sensing electrodes RE and the common voltage line VCL disposed on the left side of the touch sensor area TSA. The second switching transistor EMT 2  may be turned on based on the control signal ECS of the electromagnetic control line ECL. The electromagnetic control line ECL may supply the control signal ECS of the gate-on level to the plurality of second switching transistors EMT 2  during the electromagnetic sensing period EMR. The second switching transistor EMT 2  may be turned off during the touch sensing period FTS, and the sensing electrodes RE may not receive a common voltage. The second switching transistor EMT 2  may be turned on during the electromagnetic sensing period EMR to supply a common voltage to the sensing electrodes RE. 
     The electromagnetic control line ECL may supply the control signal ECS to the gate electrode of the first and second switching transistors EMT 1  and EMT 2 . The electromagnetic. control line ECL may extend to the first touch pad unit TP 1  via the lower side of the touch peripheral area TOA. 
     The common voltage line VCL may be disposed outside the touch peripheral area TOA, The common voltage line VCL may extend to the first touch pad unit TP 1  via the lower side of the touch peripheral area TOA. The common voltage line VCL may not extend along the left and upper sides of the touch peripheral area TOA. The common voltage line VCL may supply a common voltage to the driving electrodes TE and the sensing electrodes RE during the electromagnetic sensing period EMR. For example, the common voltage of the common voltage line VCL may be the same as the common voltage supplied to the display unit DU, but is not limited thereto. As another example, the common voltage of the common voltage line VCL may have a constant potential. As another example, the common voltage of the common voltage line VCL may be a sine wave, a pulse wave, or a ramp wave having a predetermined frequency. 
     The driving electrodes TE may be connected to the common voltage line VCL through the first extension line ETL 1  and the first switching transistor EMT 1  during the electromagnetic sensing period EMR. The electromagnetic control line ECL may supply a control signal ECS of the gate-on level to a plurality of first switching transistors EMT 1  during the electromagnetic sensing period EMR. The common voltage line VCL may supply a common voltage to the other end of the driving electrodes TE disposed farthest from the driving line TL or the touch driver  400 , so that the potential of the other end of the driving electrodes TE may be stably maintained. The common voltage line VCL may supply a common voltage to the other end of the driving electrodes TE, so that the sensing sensitivity at the other end of the driving electrodes TE may be improved. 
     The sensing electrodes RE may be connected to the common voltage line VCL through the second extension line ETL 2  and the second switching transistor EMT 2  during the electromagnetic sensing period EMR. The electromagnetic control line ECL may supply the control signal ECS of the gate-on level to the plurality of second switching transistors EMT 2  during the electromagnetic sensing period EMR. The common voltage line VCL may supply a common voltage to the other end of the sensing electrodes RE disposed farthest from the sensing line RL or the touch driver  400 , so that the potential of the other end of the sensing electrodes RE may be stably maintained. The common voltage line VCL may supply a common voltage to the other end of the sensing electrodes RE, so that the sensing sensitivity at the other end of the sensing electrodes RE may be improved. 
     Accordingly, the display device  10  may include the first and second extension lines ETL 1  and ETL 2 , the first and second switching transistors EMT 1  and EMT 2 , and the common voltage line VCL disposed in the touch peripheral area TOA, so that reliability of the sensor may be secured over the entire area of the touch sensor area TSA. 
     As another example, the plurality of switching transistors EMT and the common voltage line VCL may be disposed on the circuit board  300 . In this case, the connection relationship between the extension line ETL, the plurality of switching transistors EMT, and the common voltage line VCL may be the same as the configuration illustrated in  FIG.  17   . As another example, the touch driver  400  may include the plurality of switching transistors EMT and a common voltage line VCL. In this case, the extension line ETL may be connected to the touch driver  400 . 
       FIG.  18    is a plan view illustrating a touch sensing unit of a display device according to an embodiment of the present disclosure. The touch sensing unit TSU of  FIG.  18    further includes a demultiplexer DMX in the touch sensing unit TSU of  FIG.  17   , and the same configuration as the above-described configuration for  FIG.  17    will be briefly described or omitted. 
     Referring to  FIG.  18   , the touch sensor area TSA may include a plurality of touch electrodes SEN and a plurality of dummy electrodes DME. The plurality of touch electrodes SEN may include a plurality of driving electrodes TE and a plurality of sensing electrodes RE. 
     The touch peripheral area TOA may include the driving line TE, the sensing line RL, the plurality of extension lines ETL, a plurality of demultiplexers DMX, the electromagnetic control line ECL, and the common voltage line VCL. 
     The plurality of extension lines ETL may electrically connect the touch electrodes SEN to the plurality of demultiplexers DMX. The plurality of extension lines ETL may include the first and second extension lines ETL 1  and ETL 2 . The first extension line ETL 1  may be connected to the driving electrodes TE disposed on the upper side of the touch sensor area TSA. The first extension line ETL 1  may extend to a first demultiplexer DMX 1  via the upper side and the left side of the touch peripheral area TOA. Accordingly, the first extension line ETL 1  may electrically connect the driving electrodes TE to the first demultiplexer DMX 1 . 
     The second extension line ETL 2  may be connected to the sensing electrodes RE disposed on the left side of the touch sensor area TSA. The second extension line ETL 2  may extend to a second demultiplexer DMX 2  via the left side of the touch peripheral area TOA. Accordingly, the second extension line ETL 2  may electrically connect the sensing electrodes RE to the second demultiplexer DMX 2 . 
     The plurality of demultiplexers DMX may be a switching element connected between the plurality of touch electrodes SEN and the common voltage line VCL. The plurality of demultiplexers DMX may include the first and second demultiplexers DMX 1  and DMX 2 . The first and second demultiplexers DMX 1  and DMX 2  may be disposed on the lower side of the touch peripheral area TOA. The first demultiplexer DMX 1  may time-divide one input into two outputs. The first demultiplexer DMX 1  may electrically connect the first extension line ETL 1  to the driving line TL or the common voltage line VCL based on the control signal ECS of the electromagnetic control line ECL. The first demultiplexer DMX 1  may electrically connect the first extension line ETL 1  to the driving line TL during the touch sensing period FTS. In other words, one end of the driving electrodes TE directly connected to the driving line TL and the other end of the driving electrodes TE directly connected to the first extension line ETL 1  may be connected to each other to be connected to the touch driver  400 . Accordingly, the first demultiplexer DMX 1  may reduce the resistance of the plurality of driving electrodes TE, and the sensing sensitivity to the touch of the user&#39;s body may be improved. 
     The first demultiplexer DMX 1  may electrically connect the first extension line ETL 1  to the common voltage line VCL during the electromagnetic sensing period EMR. Accordingly, the first demultiplexer DMX 1  may supply a common voltage to the other end of the driving electrodes TE through the first extension line ETL 1 , and may improve the sensing sensitivity at the other end of the driving electrodes TE. The display device  10  may secure the reliability of the sensor over the entire area of the touch sensor area TSA. 
     The second demultiplexer DMX 2  may time-divide one input into two outputs. The second demultiplexer DMX 2  may electrically connect the second extension line ETL 2  to the sensing line RL or the common voltage line VCL based on the control signal ECS of the electromagnetic control line ECL. The second demultiplexer DMX 2  may electrically connect the second extension line ETL 2  to the sensing line RL during the touch sensing period FTS. In other words, one end of the sensing electrodes RE directly connected to the sensing line RL and the other end of the sensing electrodes RE directly connected to the second extension line ETL 2  may be connected to each other to be connected to the touch driver  400 . Accordingly, the second demultiplexer DMX 2  may reduce the resistance of the plurality of sensing electrodes RE, and the sensing sensitivity to the touch of the user&#39;s body may be improved, 
     The second demultiplexer DMX 2  may electrically connect the second extension line ETL 2  to the common voltage line VCL during the electromagnetic sensing period EMR. Accordingly, the second demultiplexer DMX 2  may supply a common voltage to the other end of the sensing electrodes RE through the second extension line ETL 2 , and may improve the sensing sensitivity at the other end of the sensing electrodes RE, The display device  10  may secure the reliability of the sensor over the entire area of the touch sensor area TSA. 
     The electromagnetic control line may supply the control signal ECS to the first and second demultiplexers DMX 1  and DMX 2 . The electromagnetic control line ECL may extend to the first touch pad unit TP 1  via the lower side of the touch peripheral area TOA. 
     The common voltage line VCL may be disposed outside the touch peripheral area TOA. The common voltage line VCL may extend to the first touch pad unit TP 1  via the lower side of the touch peripheral area TOA. The common voltage line VCL may not extend to the left and upper sides of the touch peripheral area TOA. The common voltage line VCL may supply a common voltage to the driving electrodes TE and the sensing electrodes RE during the electromagnetic sensing period EMR. For example, the common voltage of the common voltage line VCL may be the same as the common voltage supplied to the display unit DU, but is not limited thereto. As another example, the common voltage of the common voltage line VCL may have a constant potential. As another example, the common voltage of the common voltage line VCL may be a sine wave, a pulse wave, or a ramp wave having a predetermined frequency. 
     As another example, the plurality of demultiplexers DMX and the common voltage line VCL may be disposed on the circuit board  300 . In this case, the connection relationship between the extension line ETL, the plurality of demultiplexers DMX, the driving line TL, the sensing line RL, and the common voltage line VCL may be the same as the configuration illustrated in  FIG.  18   . AS another example, the touch driver  400  may include the plurality of demultiplexers DMX and the common voltage line VCL. In this case, the extension line ETL may be connected to the touch driver  400 . 
       FIG.  19    is a circuit diagram illustrating one example of a first demultiplexer in the display device of  FIG.  18   . Since the configuration of the second demultiplexer DMX 2  may be the same as the configuration of the first demultiplexer DMX 1  and the driving timing may be different, the description of the second demultiplexer DMX 2  will be omitted. 
     Referring to  FIG.  19   , the first demultiplexer DMX 1  may include first and second demux transistors DMT 1  and DMT 2 . The first and second demux transistors DMT 1  and DMT 2  may correspond to different types of transistors. 
     The first demux transistor DMT 1  may correspond to a p-type transistor, but is not limited thereto. A gate electrode of the first demux transistor DMT 1  may be connected to the electromagnetic control line ECL The first demux transistor DMT 1  may be turned on by receiving the control signal ECS of the gate low level from the electromagnetic control line The control signal ECS may be provided to the electromagnetic control line ECL in response to a signal provided to the first touch pad unit TP 1 . A first electrode of the first demux transistor DMT 1  may be connected to the first extension line ETL 1  through a first node N 1 , and a second electrode of the first demux transistor DMT 1  may be connected to the driving line TL. 
     The second demux transistor DMT 2  may correspond to an n-type transistor, but is not limited thereto. A gate electrode of the second demux transistor DMT 2  may be connected to the electromagnetic control line ECL. The second demux transistor DMT 2  may be turned on by receiving the control signal ECS of the gate high level from the electromagnetic control line ECL. A first electrode of the second demux transistor DMT 2  may be connected to the first extension line ETL 1  through the first node N 1 , and a second electrode of the second demux transistor DMT 2  may be connected to the common voltage line VCL. As can be seen, the first node N 1  may be connected to each of the first and second demux transistors DMT 1  and DMT 2 . 
       FIG.  20    is a circuit diagram illustrating another example of a first demultiplexer in the display device of  FIG.  18   . 
     Referring to  FIG.  20   , the first demultiplexer DMX 1  may include the first and second demux transistors DMT 1  and DMT 2 . The first and second demux transistors DMT 1  and DMT 2  may correspond to the same type of transistor. 
     The first demux transistor DMT 1  may correspond to an n-type transistor, but is not limited thereto. A gate electrode of the first demux transistor DMT 1  may be connected to the first electromagnetic control line ECL 1 . The first demux transistor DMT 1  may be turned on by receiving the first control signal ECS 1  of the gate high level from the first electromagnetic control line ECL 1 . A first electrode of the first demux transistor DMT 1  may be connected to the first extension line ETL 1  through a first node N 1 , and a second electrode of the first demux transistor DMT 1  may be connected to the driving line TL. 
     The second demux transistor DMT 2  may correspond to an n-type transistor, but is not limited thereto. The gate electrode of the second demux transistor DMT 2  may be connected to the second electromagnetic control line ECL 2 . The second demux transistor DMT 2  may be turned on by receiving the second control signal ECS 2  of the gate high level from the second electromagnetic control line ECL 2 . A first electrode of the second demux transistor DMT 2  may be connected to the first extension line ETL 1  through the first node N 1 , and a second electrode of the second demux transistor DMT 2  may be connected to the common voltage line VCL. By connecting the first and second demux transistors DMT 1  and DMT 2  to different electromagnetic control lines, the first and second demux transistors DMT 1  and DMT 2  may be independently controlled. 
       FIG.  21    is a circuit diagram illustrating yet another example of a first demultiplexer in the display device of  FIG.  18   . 
     Referring to  FIG.  21   , the first demultiplexer DMX 1  may include the first and second demux transistors DMT 1  and DMT 2 . The first and second demux transistors DMT 1  and DMT 2  may correspond to the same type of transistor. 
     The first demux transistor DMT 1  may correspond to a p-type transistor, but is not limited thereto. A gate electrode of the first demux transistor DMT 1  may be connected to the first electromagnetic control line ECL 1 . The first demux transistor DMT 1  may be turned on by receiving the first control signal ECS 1  of the gate low level from the first electromagnetic control line ECL 1 . A first electrode of the first demux transistor DMT 1  way be connected to the first extension line ETL 1  through a first node N 1 , and a second electrode of the first demux transistor DMT 1  may be connected to the driving line TL. 
     The second demux transistor DMT 2  may correspond to a p-type transistor, but is not limited thereto. The gate electrode of the second demux transistor DMT 2  may be connected to the second electromagnetic control line ECL 2 , The second demux transistor DMT 2  may be turned on by receiving the second control signal ECS 2  of the gate low level from the second electromagnetic control line ECL 2 . A first electrode of the second demux transistor DMT 2  may be connected to the first extension line ETL 1  through the first node N 1 , and a second electrode of the second demux transistor DMT 2  may be connected to the common voltage line VCL. 
       FIG.  22    is a plan view illustrating a touch sensing unit, a circuit board, and a touch driver of a display device according to an embodiment of the present disclosure.  FIG.  22    is a diagram illustrating a connection relationship between the first and second touch pad units TP 1  and TP 2  of the touch sensing unit TSU, and first and second contact pad units CP 1  and CP 2  of the circuit board  300 , and the same configuration as the above-described configurations will be briefly described or omitted. 
     Referring to  FIG.  22   , the display pad area DPA, the first touch pad area TPA 1 , and the second touch pad area TPA 2  may be disposed at the edge of the sub-region SBA. The display pad area DPA, the first touch pad area TPA 1 , and the second touch pad area TPA 2  may be electrically connected to the circuit board  300  by using a low-resistance high-reliability material such as an anisotropic conductive film or self assembly anisotropic conductive paste (SAP). 
     The display pad area DPA may include a plurality of display pad units DP. The plurality of display pad units DP may be connected to the main processor through the circuit board  300 . Each of the plurality of display pad units DP may be connected to each of a plurality of third contact pad units CP 3  of the circuit board  300 . The plurality of display pad units DP may be connected to the circuit board  300  to receive digital video data, and may supply the digital video data to the display driver  200 . 
     The first touch pad area TPA 1  may be disposed on one side of the display pad area DPA, and may include a plurality of first touch pad units TP 1 . Each of the plurality of first touch pad units TP 1  may be connected to each of the plurality of first contact pad units CPI of the circuit board  300 . The plurality of first touch pad units TP 1  may be electrically connected to the touch driver  400  through the plurality of first contact pad units CP 1  and first lead lines LDL 1 . The plurality of first touch pad units TP 1  may supply the first driving signal TDS to the plurality of driving lines TL. The plurality of first touch pad units TP 1  may supply a common voltage to the common voltage line VCL. 
     The second touch pad area TPA 2  may be disposed on the other side of the display pad area DPA, and may include a plurality of second touch pad units TP 2 . For example, the second touch pad area TPA 2  may be disposed on a second side of the display pad area DPA, while the first touch pad area TPA 1  may be disposed on a first side of the display pad are DPA. Each of the plurality of second touch pad units TP 2  may be connected to each of the plurality of second contact pad units CP 2  of the circuit hoard  300 . The plurality of second touch pad units TP 2  may be electrically connected to the touch driver  400  through the plurality of second contact pad units CP 2  and second lead lines LDL 2  The plurality of second touch pad units TP 2  may receive sensing signals from the plurality of sensing lines RL. 
     The touch driver  400  may be mounted on the circuit hoard  300 . The touch driver  400  may be connected to the plurality of driving lines TL, the electromagnetic control line ECL, and the common voltage line VCL through the first lead line LDL 1 , the first contact pad unit CP 1 , and the first touch pad unit TP 1 . The touch driver  400  may be connected to the plurality of sensing lines RL through the second lead line LDL 2 , the second contact pad unit CP 2 , and the second touch pad unit TP 2 . 
     The touch driver  400 , during the self-capacitance sensing period Self-Cap of the touch sensing period FTS, may supply the plurality of first driving signals TDS to the plurality of driving electrodes TE, and may supply the plurality of second driving signals RDS to the plurality of sensing electrodes RE. The touch driver  400  may sense an amount of change of the self-capacitance of each of the plurality of driving electrodes TE and the plurality of sensing electrodes RE by receiving the sensing signal from each of the plurality of driving electrodes TE and the plurality of sensing electrodes RE during the self-capacitance sensing period Self-Cap of the touch sensing period FTS. 
     The touch driver  400  may supply the plurality of first driving signals TDS to the plurality of driving electrodes TE during the mutual capacitance sensing period Mutual-Cap of the touch sensing period FTS. The touch driver  400  may sense an amount of change of the mutual capacitance between the plurality of driving electrodes TE and the plurality of sensing electrodes RE by receiving the sensing signal from the plurality of sensing, electrodes RE during the mutual capacitance sensing period Mutual-Cap of the touch sensing period FTS. Accordingly, the touch driver  400  may sense the input of the user&#39;s body during the touch sensing period FTS. 
     The touch driver  400  may supply the plurality of first driving signals TDS to the plurality of driving electrodes TE during the electromagnetic sensing period EMR. The touch driver  400  may sense the input of the input member  20  by receiving sensing signals from the plurality of driving electrodes TE during the electromagnetic sensing period EMR. The touch driver  400  may supply the plurality of second driving signals RDS to the plurality of sensing electrodes RE during the electromagnetic sensing period EMR. The touch driver  400  may sense the input of the input member  20  by receiving sensing signals from the plurality of sensing electrodes RE during the electromagnetic sensing period EMR. 
     The display device  10  may sense a touch of the user&#39;s body during the touch sensing period FTS by including the touch driver  400  implemented as one integrated circuit (IC), and may sense an approach or contact of the input member  20  such as an input pen during the electromagnetic sensing period EMR. 
       FIG.  23    is a plan view illustrating a touch sensing unit, a circuit board, a touch driving circuit, and an electromagnetic driving circuit of a display device according to an embodiment of the present disclosure. The display device of  FIG.  23    has different configurations of the touch driving circuit  401  and the electromagnetic driving circuit  402  from the display device of  FIG.  22   , and the same configuration as the above-described configuration of  FIG.  22    will be briefly described or omitted. 
     Referring to  FIG.  23   , the touch driver  400  may include a touch driving circuit  401  and an electromagnetic driving circuit  402 . 
     The touch driving circuit  401  may be connected to the plurality of driving lines TL, the electromagnetic control line ECL, and the common voltage line VCL through the first lead line LDL 1  the first contact pad unit CP 1 , and the first touch pad unit TP 1 . The touch driving circuit  401  may be connected to the plurality of sensing, lines RL through the second lead line LDL 2 , the second contact pad unit CP 2 , and the second touch pad unit TP 2 . 
     The touch driving circuit  401 , during the self-capacitance sensing period Self-Cap of the touch sensing period FTS, may supply the plurality of first driving signals TDS to the plurality of driving electrodes TE, and may supply the plurality of second driving signals RDS to the plurality of sensing electrodes RE. The touch driving circuit  401  may sense an amount of change of the self-capacitance of each of the plurality of driving electrodes TE and the plurality of sensing electrodes RE by receiving the sensing signal from each of the plurality of driving electrodes TE and the plurality of sensing electrodes RE during the self-capacitance sensing period Self-Cap of the touch sensing period FTS. 
     The touch driving circuit  401  may supply the plurality of first driving signals TDS to the plurality of driving electrodes TE during the mutual capacitance sensing period Mutual-Cap of the touch sensing period FTS. The touch driving circuit  401  may sense an amount of change of the mutual capacitance between the plurality of driving electrodes TE and the plurality of sensing electrodes RE by receiving the sensing signal from the plurality of sensing electrodes RE during the mutual capacitance sensing period Mutual-Cap. Accordingly, the touch driving circuit  401  may sense the input of the user&#39;s body during the touch sensing period FTS of the touch sensing period FTS. 
     The touch driving circuit  401  may supply an enable signal EN to the electromagnetic driving circuit  402 . The electromagnetic driving circuit  402  may be synchronized with the touch driving circuit  401  based on the enable signal EN, and may drive the touch sensing unit TSU during the electromagnetic sensing period EMR immediately after the touch sensing period FTS. 
     The electromagnetic driving circuit  402  may be connected to the plurality of driving lines TL, the electromagnetic control line ECL, and the common voltage line VCL through a third lead line LDL 3 , the first contact pad unit CP 1 , and the first touch pad unit TP 1 . The electromagnetic driving circuit  402  may be connected to the plurality of sensing lines RL through a fourth lead line LDL 4 , the second contact pad unit CP 2 , and the second touch pad unit TP 2 . 
     The electromagnetic driving circuit  402  may supply the plurality of first driving signals TDS to the plurality of driving electrodes TE during the electromagnetic sensing period EMR. The electromagnetic driving circuit  402  may sense the input of the input member  20  by receiving sensing signals from the plurality of driving electrodes TE during the electromagnetic sensing period EMR. The electromagnetic driving circuit  402  may supply the plurality of second driving signals RDS to the plurality of sensing electrodes RE during the electromagnetic sensing period EMR. The electromagnetic driving circuit  402  may sense the input of the input member  20  by receiving sensing signals from the plurality of sensing electrodes RE during the electromagnetic sensing period EMR. 
     The display device  10 , by including the touch driving circuit  401  and the electromagnetic driving circuit  402  implemented as separate ICs, may sense the touch of the user&#39;s body during the touch sensing period FTS using the touch driving circuit  401 , and may sense the approach or contact of the input member  20  such as an input pen during the electromagnetic sensing period EMR using the electromagnetic driving circuit  402 . 
       FIG.  24    is a plan view illustrating a touch sensing unit, a circuit board, a touch driving circuit, and an electromagnetic driving circuit of a display device according to an embodiment of the present disclosure. 
     Referring to  FIG.  24   , the touch driver  400  may include the touch driving circuit  401  and the electromagnetic driving circuit  402 . 
     The electromagnetic driving circuit  402  may be connected to the plurality of driving lines TL, the electromagnetic control line ECL and the common voltage line VCL through the first lead line LDL 1 , the first contact pad unit CP 1 , and the first touch pad unit TP 1 . The electromagnetic driving circuit  402  may be connected to the plurality of sensing lines RL through the second lead line LDL 2 , the second contact pad unit CP 2 , and the second touch pad unit TP 2 . 
     The electromagnetic driving circuit  402  may supply the plurality of first driving signals TDS to the plurality of driving electrodes TE during the electromagnetic sensing period EMR. The electromagnetic driving circuit  402  may sense the input of the input member  20  by receiving sensing signals from the plurality of driving electrodes TE during the electromagnetic sensing period EMR. The electromagnetic driving circuit  402  may supply the plurality of second driving, signals RDS to the plurality of sensing electrodes RE during the electromagnetic sensing period EMR. The electromagnetic driving circuit  402  may sense the input of the input member  20  by receiving sensing signals from the plurality of sensing electrodes RE during the electromagnetic sensing, period EMR. 
     The electromagnetic driving circuit  402  may supply the enable signal EN to the touch driving circuit  401 . This is different from the embodiment of  FIG.  23    in which the touch driving circuit  401  supplies to the enable signal EN to the electromagnetic driving circuit  402 , The touch driving circuit  401  may be synchronized with the electromagnetic driving circuit  402  based on the enable signal EN, and may drive the touch sensing unit TSU during the touch sensing period FTS. 
     The touch driving circuit  401  may be connected to the plurality of driving lines TL, the electromagnetic control line ECL, and the common voltage line VCL through the third lead line LDL 3 , the first contact pad unit CP 1 , and the first touch pad unit TP 1 . The touch driving circuit  401  may be connected to the plurality of sensing lines RL through the fourth lead line LDL 4 , the second contact pad unit CP 2 , and the second touch pad unit TP 2 . 
     The touch driving circuit  401  may sense an amount of change of the self-capacitance of each of the plurality of driving electrodes TE and the plurality of sensing electrodes RE during the self-capacitance sensing period Self-Cap of the touch sensing period FTS. The touch driving circuit  401  may sense an amount of change of the mutual capacitance between the plurality of driving electrodes TE and the plurality of sensing electrodes RE during the mutual capacitance sensing period Mutual-Cap of the touch sensing period FTS. Accordingly, the touch driving circuit  401  may sense the input of the user&#39;s body during the touch sensing period FTS. 
     The display device  10 , by including the touch driving circuit  401  and the electromagnetic driving circuit  402  implemented as separate ICs, may sense the touch of the user&#39;s body during the touch sensing period FTS using the touch driving circuit  401 , and may sense the approach or contact of the input member  20  such as an input pen during the electromagnetic sensing, period EMR using the electromagnetic driving circuit  402 . 
       FIG.  25    is a plan view illustrating a touch sensing unit of a display device according to an embodiment of the present disclosure. The touch sensing unit TSU of  FIG.  25    has a different configuration of a coupling capacitor EMC from the touch sensing unit TSU of  FIG.  5   , and the same configuration as the above-described configuration of  FIG.  5    will be briefly described or omitted. 
     Referring to  FIG.  25   , the touch sensing unit TSU may include a touch sensor area TSA for sensing a user&#39;s touch, and a touch peripheral area TOA disposed around the touch sensor area TSA. 
     The touch sensor area TSA may include a plurality of touch electrodes SEN and a plurality of dummy electrodes DME. The plurality of touch electrodes SEN may form mutual capacitance or self-capacitance to sense a touch of an object or a person. The plurality of touch electrodes SEN may include a plurality of driving electrodes TE and a plurality of sensing electrodes RE. 
     The touch peripheral area TOA may include the driving line TL, the sensing line RL, a plurality of coupling capacitors EMC, and the common voltage line VCL. 
     The plurality of coupling capacitors EMC may include a first coupling capacitor EMC 1  and a second coupling capacitor EMC 2 . The first coupling capacitor EMC 1  may be disposed on the upper side of the touch peripheral area TOA. The first coupling capacitor EMC 1  may be disposed on the opposite side of the driving line TL. The first coupling capacitor EMC 1  may be connected to the driving electrodes TE disposed farthest from the driving line TL. The first coupling capacitor EMC 1  may be disposed between the driving electrodes TE and the common voltage line VCL disposed on the upper side of the touch sensor area TSA. Accordingly, the first coupling capacitor EMC 1  may maintain a potential difference between the driving electrodes TE and the common voltage line VCL. The first coupling capacitor EMC 1  may be connected to each driving electrode TE column. 
     The second coupling capacitor EMC 2  may be disposed on the left side of the touch peripheral area TOA. The second coupling capacitor EMC 2  may be disposed on the opposite side of the sensing line RL. The second coupling capacitor EMC 2  may be connected to the sensing electrodes RE disposed farthest from the sensing line RL. The second coupling capacitor EMC 2  may be disposed between the sensing electrodes RE and the common voltage line VCL disposed on the left side of the touch sensor area TSA. Accordingly, the second coupling capacitor EMC 2  may maintain a potential difference between the sensing electrodes RE and the common voltage line VCL. The second coupling capacitor EMC 2  may be connected to each sensing electrode RE column. 
     The common voltage line VCL may be disposed along the periphery of the touch peripheral area TOA. The common voltage line VCL may extend to the first touch pad unit TP 1  via the upper side, the left side, and the lower side of the touch peripheral area TOA. The number of common voltage lines is not limited to that illustrated in  FIG.  25   . For example, the common voltage of the common voltage line VCL may be the same as the common voltage supplied to the display unit DU, but is not limited thereto. As another example, the common voltage of the common voltage line VCL may have a constant potential. As another example, the common voltage of the common voltage line VCL may be a sine wave, a pulse wave, or a ramp wave having a predetermined frequency. 
     One end of the plurality of driving electrodes TE may be connected to the driving line TL, and the other end of the plurality of driving electrodes TE may be connected to the first coupling capacitor EMC 1 . In other words, a first end of the plurality of driving electrodes IF may be connected to the driving line TL, and a second end of the plurality of driving electrodes TE may be connected to the first coupling capacitor EMC 1 , The first coupling capacitor EMC 1  may maintain a potential difference between the common voltage line VCL and the other end (e.g., second end) of the driving electrodes TE disposed farthest from the driving line TL or the touch driver  400 , and thus may stably maintain the potential of the other end of the driving electrodes TE. The first coupling capacitor EMC 1  may improve sensing sensitivity at the other end (e.g., second end) of the driving electrodes TE. 
     One end of the plurality of sensing electrodes RE may be connected to the sensing line RL, and the other end of the plurality of sensing electrodes RE may be connected to the second coupling capacitor EMC 2 . In other words, a first end of the plurality of sensing electrodes RE may be connected to the sensing line RL, and a second end of the plurality of sensing electrodes RE may be connected to the second coupling capacitor EMC 2 . The second coupling capacitor EMC 2  may maintain a potential difference between the common voltage line VCL and the other end (e.g., second end) of the sensing electrodes RE disposed farthest from the sensing line RL or the touch driver  400 , and thus may stably maintain the potential of the other end (e.g., second end) of the sensing electrodes RE. The second coupling capacitor EMC 2  may improve sensing sensitivity at the other end of the sensing electrodes RE. 
     Accordingly, the display device  10  may include the coupling capacitor EMC and the common voltage line VCL disposed in the touch peripheral area TOA, so that the reliability of the sensor may be secured over the entire area of the touch sensor area TSA. 
     The display device  10  may sense the touch of the input member  20  by using the touch sensing unit TSU that senses the touch of the user&#39;s body. The display device  10  may sense a touch of the user&#39;s body during the touch sensing period FTS using the touch sensing unit TSU, and may sense the approach or contact of the input member  20  such as an input pen during the electromagnetic sensing period EMR. Accordingly, the display device  10  may not include a separate sensor layer or a digitizer layer for the electromagnetic resonance of the input member  20 , so that the thickness of the display device  10  may be decreased, and the costs may be reduced. 
       FIG.  26    is a plan view illustrating an example of a touch sensing unit of the display device of  FIG.  25   , and  FIG.  27    is a cross-sectional view taken along line II-II′ of  FIG.  26   . 
     Referring to  FIGS.  26  and  27   , the non-display area NDA and the touch peripheral area TOA may include the second coupling capacitor EMC 2 .  FIGS.  26  and  27    illustrate the example of the second coupling capacitor EMC 2 , but the first coupling capacitor EMC 1  may also be formed in the same manner as the second coupling capacitor EMC 2 . 
     The second coupling capacitor EMC 2  may maintain a potential difference between the sensing electrodes RE and the common electrode CAT. The second coupling capacitor EMC 2  may include a first capacitor electrode ECP 1  and a second capacitor electrode ECP 2 . The first capacitor electrode ECP 1  may be disposed on the first metal layer YML 1  of the touch sensing unit TSU. The first capacitor electrode ECP 1  may be connected to the sensing electrode RE of the touch sensor area TSA through a contact hole provided in the first insulating layer SIL 1 . For example, the sensing electrode RE connected to the first capacitor electrode ECP 1  may correspond to the sensing line RL or the other end of the sensing electrodes RE disposed farthest from the touch driver  400 . The first capacitor electrode ECP 1  may be a plate electrode having a predetermined area. 
     The second capacitor electrode ECP 2  may be a portion of the common voltage line VCL integrally formed with the common electrode CAT of the display unit DU. The second capacitor electrode ECP 2  may correspond to a portion of the common voltage line VCL that overlaps the first capacitor electrode ECP 1 . The common electrode CAT may be implemented in the form of an electrode common to all pixels of the display unit DU, and may extend to the non-display area NDA. Accordingly, the common electrode CAT may be a cathode electrode that supplies a common voltage to the light emitting element LED of the display unit DU, and may be the second capacitor electrode ECP 2  that supplies a common voltage to the second coupling capacitor EMC 2  of the touch peripheral area TOA. Accordingly, the second capacitor electrode ECP 2  may correspond to the common voltage line VCL of  FIG.  25   , and the display device  10  may not include a separate voltage line. The display device  10  may supply a common voltage to the second coupling capacitor EMC 2  using the common electrode CAT of the display unit DU. The display device  10  may stably maintain the potential of the other end of the sensing electrodes RE, and may improve the sensing sensitivity at the other end of the sensing electrodes RE. 
       FIG.  28    is a plan view illustrating another example of a touch sensing unit of the display device of  FIG.  25   , and  FIG.  29    is a cross-sectional view taken along line III-III′ of  FIG.  28   . 
     Referring to  FIGS.  28  and  29   , the non-display area NDA and the touch peripheral area TOA may include the second coupling capacitor EMC 2 .  FIGS.  28  and  29    illustrate the example of the second coupling capacitor EMC 2 , but the first coupling capacitor EMC 1  may also be formed in the same manner as the second coupling capacitor EMC 2 . 
     The second coupling capacitor EMC 2  may maintain a potential difference between the sensing electrodes RE and the common voltage line VCL. The second coupling capacitor EMC 2  may include a first capacitor electrode ECP 1  and a second capacitor electrode ECP 2 . 
     The first capacitor electrode ECP 1  may be disposed on the first metal layer YML 1  of the touch sensing unit TSU. The first capacitor electrode ECP 1  may be connected to the sensing electrode RE of the touch sensor area TSA through a contact hole provided in the first insulating layer SIL 1 . For example, the sensing electrode RE connected to the first capacitor electrode ECP 1  may correspond to the sensing line RL or the other end of the sensing electrodes RE disposed farthest from the touch driver  400 . The first capacitor electrode ECP 1  may be a plate electrode having a predetermined area. 
     The second capacitor electrode ECP 2  may be disposed on the second metal layer YML 2  of the touch sensing unit TSU. The second capacitor electrode ECP 2  may be connected to the common voltage line VCL disposed in the first metal layer YML 1  through a contact hole provided in the first insulating layer SIL 1 . The second capacitor electrode ECP 2  may receive a common voltage from the common voltage line VCL. The second capacitor electrode ECP 2  may overlap the first capacitor electrode ECP 1 , and may be a plate electrode having a predetermined area. The display device  10  may supply a common voltage to the second coupling, capacitor EMC 2  using the common voltage line VCL. The display device  10  may stably maintain the potential of the other end of the sensing electrodes RE, and may improve the sensing sensitivity at the other end of the sensing electrodes RE. 
     A plurality of trace lines TRC may be disposed on the second metal layer YML 2 . For example, the plurality of trace lines TRC may be disposed on the first insulating layer SIL 1 . The plurality of trace lines IRC may extend along the touch peripheral area TOA, and may be insulated from the common voltage line VCL or the second coupling capacitor EMC 2 . A part of the plurality of trace lines TRC may be disposed between the second capacitor electrode ECP 2  and the sensing electrode RE, and another part of the plurality of trace lines TRC may be disposed outside the common voltage line VCL. For example, the second capacitor electrode ECP 2  may be disposed between pairs of the plurality of trace lines TRC. The plurality of trace lines TRC may transmit a predetermined signal or voltage. Optionally, the plurality of trace lines TRC may be omitted. 
       FIG.  30    is a plan view illustrating yet another example of a touch sensing unit of the display device of  FIG.  25   . 
     Referring to  FIG.  30   , the non-display area NDA and the touch peripheral area TOA may include a second coupling capacitor EMC 2 .  FIG.  30    illustrates the example of the second coupling capacitor EMC 2 , but the first coupling capacitor EMC 1  may also be formed in the same manner as the second coupling capacitor EMC 2 . 
     The second coupling capacitor EMC 2  may maintain a potential difference between the sensing electrodes RE and the common voltage line VCL. The second coupling capacitor EMC 2  may include a first capacitor electrode ECP 1  and a second capacitor electrode ECP 2 . The first capacitor electrode ECP 1  may be disposed on the first metal layer YML 1  of the touch sensing unit TSU. The first capacitor electrode ECP 1  may be connected to the sensing electrode RE of the touch sensor area TSA. This connection is illustrated by the three horizontal portions connecting the first capacitor electrode ECP 1  to the sensing electrodes RE. For example, the sensing electrode RE connected to the first capacitor electrode ECP 1  may correspond to the sensing line RE or the other end of the sensing electrodes RE disposed farthest from the touch driver  400 . The first capacitor electrode ECP 1  may be a plate electrode having a predetermined area. The plurality of first capacitor electrodes ECP 1  corresponding to each of the plurality of sensing electrodes RE may be spaced apart from each other in the Y-axis direction. For example, one first capacitor electrode ECP 1  may correspond to the sensing electrodes RE connected to one sensing line RL, but is not limited thereto. 
     The second capacitor electrode ECP 2  may be disposed on the second metal layer YML 2  of the touch sensing unit TSU. The second capacitor electrode ECP 2  and the common voltage line VCL may be integrally formed and disposed on the second metal layer YML 2 . The common voltage line VCL may extend in the Y-axis direction, and the second capacitor electrode ECP 2  may correspond to a portion of the common voltage line VCL that overlaps the first capacitor electrode ECP 1 . The plurality of second capacitor electrodes ECP 2  may be connected to each other by the common voltage line VCL. The length of the second capacitor electrode ECP 2  in the X-axis direction may be greater than the length of the common voltage line VCL in the X-axis direction, but is not limited thereto. The second capacitor electrode ECP 2  may receive a common voltage from the common voltage line VCL. The display device  10  may supply a common voltage to the second coupling capacitor EMC 2  using the common voltage line VCL. The display device  10  may stably maintain the potential of the other end of the sensing electrodes RE, and may improve the sensing sensitivity at the other end of the sensing electrodes RE. 
     A plurality of trace lines TRC may be disposed on the second metal layer YML 2 . The plurality of trace lines TRC may extend along the touch peripheral area TOA, and may be insulated from the common voltage line VCL or the second coupling capacitor EMC 2 . A part of the plurality of trace lines TRC may be disposed between the second coupling capacitor EMC 2  and the sensing electrode RE, and another part of the plurality of trace lines TRC may be disposed outside the common voltage line VCL. The plurality of trace lines TRC may transmit a predetermined signal or voltage. Optionally, the plurality of trace lines TRC may be omitted. 
       FIG.  31    is a graph illustrating sensing sensitivity of a sensing system according to an embodiment of the present disclosure. 
     Referring to  FIG.  31   , when the touch sensing unit TSU does not include the coupling capacitor EMC (without the EMC), the potential of the other end of the touch electrodes SEN may be unstable. In this case, a sensing value by the touch electrodes SEN adjacent to the touch driver  400  may be relatively high (touch driver side), and a sensing value by the touch electrodes SEN spaced far apart from the touch driver  400  may be relatively low (VCL side). Accordingly, when the touch sensing unit TSU does not include the coupling capacitor EMC (without the EMC), a difference in sensing sensitivity may occur according to the positions of the touch electrodes SEN. 
     When the touch sensing unit TSU includes the coupling capacitor EMC (with the EMC), the plurality of coupling capacitors EMC may stably maintain the potential of the other end of the touch electrodes SEN. In this case, a value sensed by the touch electrodes SEN spaced far apart from the touch driver  400  may be relatively increased (VCL side). Accordingly, when the touch sensing unit TSU includes the coupling capacitor EMC (with the EMC), the sensing sensitivity by the touch electrodes SEN adjacent to the common voltage line VCL may be improved (VCL side). The display device  10  may include the coupling capacitor EMC and the common voltage line VCL disposed in the touch peripheral area TOA, so that the reliability of the sensor may be secured over the entire area of the touch sensor area TSA. 
       FIG.  32    is a plan view illustrating a touch sensing unit of a display device according to an embodiment of the present disclosure. The touch sensing unit TSU of  FIG.  32    has different configurations of the coupling capacitor EMC and the common voltage line VCL from the touch sensing unit TSU of  FIG.  25   , and the same configuration as the above-described configuration of  FIG.  25    will be briefly described or omitted. 
     Referring to  FIG.  32   , the touch sensor area TSA may include a plurality of touch electrodes SEN and a plurality of dummy electrodes DME, The plurality of touch electrodes SEN may, include a plurality of driving electrodes TE and a plurality of sensing electrodes RE. 
     The touch peripheral area TOA may include the driving line TL, the sensing line RL, a plurality of coupling capacitors EMC, and the plurality of the common voltage line VCL. 
     The plurality of coupling capacitors EMC may include a first coupling capacitor EMC 1 . and a second coupling capacitor EMC 2 . The first coupling capacitor EMC 1  may be disposed on the upper side of the touch peripheral area TOA. The first coupling capacitor EMC 1  may be disposed on the opposite side of the driving line TL. The first coupling capacitor EMC 1  may be connected to the driving electrodes TE disposed farthest from the driving line TL. A part of the plurality of first coupling capacitors EMC 1  may be disposed between the driving electrodes TE and the first common voltage line VCL 1 . In other words, first portion of the plurality of first coupling capacitors EMC 1  may be disposed between the driving electrodes TE and the first common voltage line VCL 1 . Another part of the plurality of first coupling capacitors EMC 1  may be disposed between the driving electrodes TE and the second common voltage line VCL 2 . In other words, a second portion of the plurality of first coupling capacitors EMC 1  may be disposed between the driving electrodes TE and the second common voltage line VCL 2 . For example, the plurality of first coupling capacitors EMC 1  may be alternately connected to the first or second common voltage line VCL 1  or VCL 2  according to a disposed order, but the present disclosure is not limited thereto. Accordingly, the first coupling capacitor EMC 1  may maintain a potential difference between the first or second common voltage line VCL 1  or VCL 2  and the driving electrodes TE. 
     The second coupling capacitor EMC 2  may be disposed on the left side of the touch peripheral area TOA. The second coupling capacitor EMC 2  may be disposed on the opposite side of the sensing line RL. The second coupling capacitor EMC 2  may be connected to the sensing electrodes RE disposed farthest from the sensing line RL. A part of the plurality of second coupling capacitors EMC 2  may be disposed between the sensing electrodes RE and a third common voltage line VCL 3 . In other words, a first portion of the plurality of second coupling capacitors EMC 2  may be disposed between the sensing electrodes RE and a third common voltage line VCL 3 . Another part of the plurality of second coupling capacitors EMC 2  may be disposed between the sensing electrodes RE and a fourth common voltage line VCL 4 . In other words, a second portion of the plurality of second coupling capacitors EMC 2  may be disposed between the sensing electrodes RE and a fourth common voltage line VCL 4 . For example, the second coupling capacitors EMC 2  disposed on the upper side may be connected to the third common voltage line VCL 3 , and the second coupling capacitors EMC 2  disposed on the lower side may be connected to the fourth common voltage line VCL 4 , but the present disclosure is not limited thereto. Accordingly, the second coupling capacitor EMC 2  may maintain a potential difference between the third or fourth common voltage line VCL 3  or VCL 4  and the sensing electrodes RE. 
     The common voltage line VCL may be disposed along the periphery of the touch peripheral area TOA. The common voltage line VCL may include the first to fourth common voltage lines VCL 1 , VCL 2 , VCL 3 , and VCL 4 . The first and second common voltage lines VCL 1  and VCL 2  may extend to the first touch pad unit TP 1  via the upper side, the left side, and the lower side of the touch peripheral area TOA. The first and second common voltage lines VCL 1  and VCL 2  may be connected to the other end of the plurality of first coupling capacitors EMC 1 . 
     The third and fourth common voltage lines VCL 3  and VCL 4  may extend to the first touch pad unit TP 1  via the left side and the lower side of the touch peripheral area TOA. The third and fourth common voltage lines VCL 3  and VCL 4  may be connected to the other end of the plurality of second coupling capacitors EMC 2 . For example, the common voltage of the first to fourth common voltage lines VCL 1 , VCL 2 , VCL 3 , and VCL 4  may be the same as the common voltage supplied to the display unit DU, but is not limited thereto. For another example, the common voltage of at least one of the first to fourth common voltage lines VCL 1 , VCL 2 , VCL 3 , and VCL 4  may be different. A common voltage of a part of the first to fourth common voltage lines VCL 1 , VCL 2 , VCL 3 , and VCL 4  may have a constant potential, and a common voltage of another part of the first to fourth common voltage lines VCL 1 , VCL 2 , VCL 3  and VCL 4  may be a sine wave, a pulse wave, or a ramp wave having a predetermined frequency. 
     One end of the plurality of driving electrodes TE may be connected to the driving line TL, and the other end of the plurality of driving electrodes TE may be connected to the first coupling capacitor EMC 1 . The first coupling, capacitor EMC 1  may maintain a potential difference between the first or second common voltage line VCL 1  or VCL 2 , and the other end of the driving electrodes TE, and thus may stably maintain the potential of the other end of the driving electrodes TE. The first coupling capacitor EMC 1  may improve sensing sensitivity at the other end of the driving electrodes TE. 
     One end of the plurality of sensing electrodes RE may be connected to the sensing line RL, and the other end of the plurality of sensing electrodes RE may be connected to the second coupling capacitor EMC 2 . The second coupling capacitor EMC 2  may maintain a potential difference between the third or fourth common voltage line VCL 3  or VCL 4 , and the other end of the sensing electrodes RE, and thus may stably maintain the potential of the other end of the sensing electrodes RE. The second coupling capacitor EMC 2  may improve sensing sensitivity at the other end of the sensing electrodes RE. 
     Accordingly, the display device  10  may include the coupling capacitor EMC and the common voltage line VCL disposed in the touch peripheral area TOA, so that the reliability of the sensor may be secured over the entire area of the touch sensor area TSA. 
     The display device  10  may sense the touch of the input member  20  by using the touch sensing unit TSU that senses the touch of the user&#39;s body. The display device  10  may sense a touch of the user&#39;s body during the touch sensing period FTS using the touch sensing unit TSU, and may sense the approach or contact of the input member  20  such as an input pen during the electromagnetic sensing period EMR. Accordingly, the display device  10  may not include a separate sensor layer or a digitizer layer for the electromagnetic resonance of the input member  20 , so that the thickness of the display device  10  may be decreased, and the costs may be reduced. 
       FIG.  33    is a plan view illustrating a touch sensing unit of a display device according to an embodiment of the present disclosure. The touch sensing unit TSU of  FIG.  33    has a different configuration of the coupling capacitor EMC from the touch sensing unit TSU of  FIG.  32   , and the same configuration as the above-described configuration of  FIG.  32    will be briefly described or omitted. 
     Referring to  FIG.  33   , the touch sensor area TSA may include the plurality of touch electrodes SEN and the plurality of dummy electrodes DME. The plurality of touch electrodes SEN may include a plurality of driving electrodes TE and a plurality of sensing electrodes RE. 
     The touch peripheral area TOA may include the driving line TL, the sensing line RL, a plurality of coupling capacitors EMC, and the plurality of the common voltage line VCL. 
     The plurality of coupling capacitors EMC may include a first coupling capacitor EMC 1  and a second coupling capacitor EMC 2 . The first coupling capacitor EMC 1  may include a first-first coupling capacitor EMC 11  and a first-second coupling capacitor EMC 12 . The first-first and first-second coupling capacitors EMC 11  and EMC 12  may be disposed on the upper side of the touch peripheral area TOA. The first-first and first-second coupling capacitors EMC 11  and EMC 12  may be disposed on the opposite side of the driving line The first-first and first-second coupling capacitors EMC 11  and EMC 12  may be connected to the driving electrodes TE disposed farthest from the driving line TL. The first-first coupling capacitor EMC 11  may be disposed between the driving electrodes TE and the first common voltage line VCL 1 . The first-second coupling capacitor EMC 12  may be disposed between the driving electrode TE connected to the first-first coupling capacitor EMC 11  and the second common voltage line VCL 2 . One driving electrode TE may be connected to each of the first-first and first-second coupling capacitors EMC 11  and EMC 12 . Accordingly, the first coupling capacitor EMC 1  may maintain a potential difference between the first or second common voltage line VCL 1  or VCL 2  and the driving electrodes TE. 
     The second coupling capacitor EMC 2  may include a second-first coupling capacitor. EMC 21  and a second-second coupling capacitor EMC 22 . The second-first and second-second coupling capacitors EMC 21  and EMC 22  may be disposed on the left side of the touch peripheral area TOA. The second-first and second-second coupling capacitors EMC 21  and EMC 22  may be disposed on the opposite side of the sensing line RL. The second-first and second-second coupling capacitors EMC 21  and EMC 22  may be connected to the sensing electrodes RE disposed farthest from the sensing line RL. The second-first coupling capacitor EMC 21  may be disposed between the sensing electrodes RE and the third common voltage line VCL 3 . The second-second coupling capacitor EMC 22  may be disposed between the sensing electrode RE connected to the second-first coupling capacitor EMC 21  and the fourth common voltage line VCL 4 . One sensing electrode RE may be connected to each of the second-first and second-second coupling capacitors EMC 21  and EMC 22 . Accordingly, the second coupling capacitor EMC 2  may maintain a potential difference between the third or fourth common voltage line VCL 3  or VCL 4  and the sensing electrodes RE. 
     One end of the plurality of driving electrodes TE may be connected to the driving line TL, and the other end of the plurality of driving electrodes TE may be connected to the first coupling capacitor EMC 1 . The first coupling capacitor EMC 1  may maintain a potential difference between the first or second common voltage line VCL 1  or VCL 2 , and the other end of the driving electrodes TE, and thus may stably maintain the potential of the other end of the driving electrodes TE. The first coupling capacitor EMC 1  may improve sensing sensitivity at the other end of the driving electrodes TE. 
     One end of the plurality of sensing electrodes RE may be connected to the sensing line RL, and the other end of the plurality of sensing electrodes RE may be connected to the second coupling capacitor EMC 2 . The second coupling capacitor EMC 2  may maintain a potential difference between the third or fourth common voltage line VCL 3  or VCL 4 , and the other end of the sensing electrodes RE, and thus may stably maintain the potential of the other end of the sensing electrodes RE. The second coupling capacitor EMC 2  may improve sensing sensitivity at the other end of the sensing electrodes RE. 
     Accordingly, the display device  10  may include the coupling capacitor EMC and the common voltage line VCL disposed in the touch peripheral area TOA, so that the reliability of the sensor may be secured over the entire area of the touch sensor area TSA. 
     The display device  10  may sense the touch of the input member  20  by using the touch sensing unit TSU that senses the touch of the user&#39;s body. The display device  10  may sense a touch of the user&#39;s body during the touch sensing period FTS using the touch sensing unit TSU, and may sense the approach or contact of the input member  20  such as an input pen during the electromagnetic sensing period EMR. Accordingly, the display device  10  may not include a separate sensor layer or a digitizer layer for the electromagnetic resonance of the input member  20 , so that the thickness of the display device  10  may be decreased, and the costs may be reduced. 
       FIG.  34    is a plan view illustrating a touch sensing unit of a display device according to an embodiment of the present disclosure, and  FIG.  35    is a waveform diagram illustrating a signal applied to the touch sensing unit of  FIG.  34   . 
     Referring to  FIGS.  34  and  35   , the touch sensor area TSA may include the plurality of touch electrodes SEN and the plurality of dummy electrodes DME The plurality of touch electrodes SEN may include a plurality of driving electrodes TE and a plurality of sensing electrodes RE. 
     The touch peripheral area TOA may include the driving line TL, the sensing line RL, a plurality of coupling capacitors EMC, and the plurality of the common voltage line VCL. 
     The plurality of coupling capacitors EMC may include a first coupling capacitor EMC 1 . and a second coupling capacitor EMC 2 . The first coupling capacitor EMC 1  may be disposed on the upper side of the touch peripheral area TOA. The first coupling capacitor EMC 1  may be disposed on the opposite side of the driving line TL. The first coupling capacitor EMC 1  may be connected to the driving electrodes TE disposed farthest from the driving line TL. The plurality of first coupling capacitors EMC 1  may be disposed between the driving electrodes TE and the first common voltage line VCL 1 . Accordingly, the first coupling capacitor EMC 1  may maintain a potential difference between the first common voltage line VCL 1  and the driving electrodes TE. 
     The second coupling capacitor EMC 2  may be disposed on the left side of the touch peripheral area TOA. The second coupling capacitor EMC 2  may be disposed on the opposite side of the sensing line RL. The second coupling capacitor EMC 2  may be connected to the sensing electrodes RE disposed farthest from the sensing line RL. The plurality of second coupling, capacitors EMC 2  may be disposed between the sensing electrodes RE and the second common voltage line VCL 2 . Accordingly, the second coupling capacitor EMC 2  may maintain a potential difference between the second common voltage line VCL 2  and the sensing electrodes RE. 
     The touch driver  400 , during the self-capacitance sensing period Self-Cap of the touch sensing period FTS, may supply the plurality of first driving signals TDS having a first phase to the plurality of driving electrodes TE, and may supply the plurality of second driving signals RDS having, a first phase to the plurality of sensing electrodes RE. The touch driver  400 , during the self-capacitance sensing period Self-Cap of the touch sensing period FTS, may supply a first common voltage VCM 1  having a first phase to the first common voltage line VCL 1 , and may supply a second common voltage VCM 2  having a first phase to the second common voltage line VCL 2 . Accordingly, the plurality of first driving signals TDS and the first common voltage VCM 1  may have the same phase, and the plurality of second driving signals RDS and the second common voltage VCM 2  may have the same phase, so that the touch driver  400  may stably maintain the potential of the other end of the driving, electrodes TE and the potential of the other end of the sensing electrodes RE. The touch driver  400  may sense an amount of change of the self-capacitance of each of the plurality of driving electrodes TE and the plurality of sensing electrodes RE by receiving the sensing signal from each of the plurality of driving electrodes TE and the plurality of sensing electrodes R during the self-capacitance sensing period Self-Cap of the touch sensing period FTS. 
     The touch driver  400  may supply the plurality of first driving signals IDS having the first phase to the plurality of driving electrodes TE during the mutual capacitance sensing period Mutual-Cap of the touch sensing period FTS. The touch driver  400  may supply the first common voltage VCM 1  having the first phase to the first common voltage line VCL 1  during the mutual capacitance sensing period Mutual-Cap of the touch sensing period FTS. Accordingly, the plurality of first driving signals TDS and the first common voltage VCM 1  may have the same phase, so that the touch driver  400  may stably maintain the potential of the other end of the driving electrodes TE. The touch driver  400  may sense an amount of change of the mutual capacitance between the plurality of driving electrodes TE and the plurality of sensing electrodes RE by receiving the sensing signal from the plurality of sensing electrodes RE during the mutual capacitance sensing period Mutual-Cap of the touch sensing period FTS. 
     The touch driver  400  may supply the second driving signal RDS having the first phase to the plurality of sensing electrodes RE during the charging period of the electromagnetic sensing period EMR. The touch driver  400  may supply the second common voltage VCM 2  having the second phase to the second common voltage line VCL 2  during the charging period of the electromagnetic sensing, period EMR. The first phase of the second driving signal RDS and the second phase of the second common voltage VCM 2  may be opposite to each other. Accordingly, the potential difference across both ends of the second coupling capacitor EMC 2  may be doubled compared to a case where the second common voltage VCM 2  has a constant potential. A current flowing through the second coupling capacitor EMC 2  may be doubled compared to a case where the second common voltage VCM 2  has a constant potential. The second coupling capacitor EMC 2  may improve sensing sensitivity at the other end of the sensing electrodes RE. 
     The touch driver  400  may supply the second common voltage VCM 2  to the second common voltage line VCL 2  during the discharging period of the electromagnetic sensing period EMR. The second common voltage VCM 2  may have a constant potential during the discharging period of the electromagnetic sensing period EMR. The touch driver  400  may generate a differential sensing signal SER by amplifying a voltage difference between sensing signals received from the plurality of sensing electrodes RE. The touch driver  400  may determine whether the input of the input member  20  has been made based on the differential sensing signal SER. 
     Accordingly, the display device  10  may supply the second driving signal RDS having a first phase and the second common voltage VCM 2  having a second phase opposite to the first phase during the charging period of the electromagnetic sensing period EMR, so that the sensing sensitivity at the other end of the sensing electrodes RE may be improved. The display device  10  may sense the touch of the input member  20  by using the touch sensing unit TSU that senses the touch of the user&#39;s body, and may increase the reliability of the sensor over the entire area of the touch sensor area TSA. 
       FIG.  36    is a plan view illustrating a touch sensing unit of a display device according to an embodiment of the present disclosure, and  FIG.  37    is a waveform diagram illustrating a signal applied to the touch sensing unit of  FIG.  35   . 
     Referring to  FIGS.  36  and  37   , the touch sensor area ISA may include the plurality of touch electrodes SEN and the plurality of dummy electrodes DME. The plurality of touch electrodes SEN may include a plurality of driving electrodes TE and a plurality of sensing electrodes RE. 
     The touch peripheral area TOA may include the driving line TL, the sensing line RL, a plurality of coupling capacitors EMC, and the plurality of the common voltage line VCL. 
     The plurality of coupling capacitors EMC may include a first coupling capacitor EMC 1  and a second coupling capacitor EMC 2 . The first coupling capacitor EMC 1  may be disposed on the upper side of the touch peripheral area TOA. The first coupling capacitor EMC 1  may be disposed on the opposite side of the driving line TL. The first coupling capacitor EMC 1  may be connected to the driving electrodes TE disposed farthest from the driving line TL. A part (or first portion) of the plurality of first coupling capacitors EMC 1  may be disposed between the driving electrodes TE and the first common voltage line VCL 1 . Another part (or second portion) of the plurality of first coupling capacitors EMC 1  may be disposed between the driving electrodes TE and the second common voltage line VCL 2 . For example, the plurality of first coupling capacitors EMC may be alternately connected to the first or second common voltage line VCL 1  or VCL 2  according to a disposed order, but the present disclosure is not limited thereto. Accordingly, the first coupling capacitor EMC 1  may maintain a potential difference between the first or second common voltage line VCL 1  or VCL 2  and the driving electrodes TE. 
     The second coupling capacitor EMC 2  may be disposed on the left side of the touch peripheral area TOA. The second coupling capacitor EMC 2  may be disposed on the opposite side of the sensing line RL. The second coupling capacitor EMC 2  may be connected to the sensing electrodes RE disposed farthest from the sensing line RL. A part (or first portion) of the plurality of second coupling capacitors EMC 2  may be disposed between the sensing electrodes RE and a third common voltage line VCL 3 . Another part (or second portion) of the plurality of second coupling capacitors EMC 2  may be disposed between the sensing electrodes RE and a fourth common voltage line VCL 4 . For example, the plurality of second coupling capacitors EMC 2  may be alternately connected to the third or fourth common voltage line VCL 3  or VCL 4  according to a disposed order, but the present disclosure is not limited thereto. Accordingly, the second coupling capacitor EMC 2  may maintain a potential difference between the third or fourth common voltage line VCL 3  or VCL 4  and the sensing electrodes RE. 
     The touch driver  400 , during the self-capacitance sensing period Self-Cap of the touch sensing period FTS, may supply the plurality of first driving signals TDs having a first phase to the plurality of driving electrodes TE, and may supply the plurality of second driving signals RDS having a first phase to the plurality of sensing electrodes RE. The touch driver  400 , during the self-capacitance sensing period Self-Cap of the touch sensing period FTS, may supply a first common voltage VCM 1  having a first phase to the first common voltage line VCL 1 , and may supply a second common voltage VCM 2  having a first phase to the second common voltage line VCL 2 . The touch driver  400 , during the self-capacitance sensing period Self-Cap of the touch sensing period FTS, may supply a third common voltage VCM 3  having a first phase to the third common voltage line VCL 3 , and may supply a fourth common voltage VCM 4  having a first phase to the fourth common voltage line VCL 4 . Accordingly, the plurality of first driving signals TDS and the first or second common voltage VCM 1  or VCM 2  may have the same phase, and the plurality of second driving signals RDS and the third or fourth common voltage VCM 3  or VCM 4  may have the same phase, so that the touch driver  400  may stably maintain the potential of the other end of the driving electrodes TE and the potential of the other end of the sensing electrodes RE. The touch driver  400  may sense an amount of change of the self-capacitance of each of the plurality of driving electrodes TE and the plurality of sensing electrodes RE by receiving the sensing signal from each of the plurality of driving electrodes TE and the plurality of sensing electrodes RE during the self-capacitance sensing period Self-Cap of the touch sensing period FTS. 
     The touch driver  400  may supply the plurality of first driving signals TDS having the first phase to the plurality of driving electrodes TE during the mutual capacitance sensing period Mutual-Cap of the touch sensing period FTS. The touch driver  400 , during the mutual-capacitance sensing period Self-Cap, may supply a first common voltage VCM 1  having a first phase to the first common voltage line VCL 1 , and may supply a second common voltage VCM 2  having a first phase to the second common voltage line VCL 2 . Accordingly, the plurality of first driving signals TDS and the first or second common voltage VCM 1  or VCM 2  may have the same phase, so that the touch driver  400  may stably maintain the potential of the other end of the driving electrodes TE. The touch driver  400  may sense an amount of change of the mutual capacitance between the plurality of driving electrodes TE and the plurality of sensing electrodes RE by receiving the sensing signal from the plurality of sensing electrodes RE during the mutual capacitance sensing period Mutual-Cap of the touch sensing period FTS. The third or fourth common voltage VCM 3  or VCM 4  may not be applied during the mutual capacitance sensing period Mutual-Cap of the touch sensing period FTS. Similarly, the second driving signals RDS may not be applied during the mutual capacitance sensing period Mutual-Cap of the touch sensing period FTS. 
     The touch driver  400 , during the charging period of the electromagnetic sensing period EMR, may supply a second-first driving signal RDS 1  having a first phase to one sensing electrode RE among the plurality of sensing electrodes RE, and may supply a second-second driving signal RDS 2  having a second phase to the other sensing electrode RE among the plurality of sensing electrodes RE. Here, the sensing electrode RE receiving the second-first driving signal RDS 1  may be the sensing electrode RE disposed on one side of the specific point PT, and the sensing electrode RE receiving the second-second driving signal RDS 2  may be the sensing electrode RE disposed on the other side of the specific point PT. The first phase of the second-first driving signal RDS 1  and the second phase of the second-second driving signal RDS 2  may be opposite to each other. Accordingly, the direction of the magnetic field of each of the sensing electrodes RE disposed on both sides of the specific point PT may coincide at the specific point PT, so that a magnetic field may be generated according to the constructive interference of the magnetic field, to charge the input member  20 . 
     The touch driver  400 , during the charging period, may supply the third common voltage VCM 3  having a second phase to the third common voltage line VCL 3 , and may supply the fourth common voltage VCM 4  having a first phase to the fourth common voltage line VCL 4 . The first phase of the second-first driving signal RDS 1  and the second phase of the third common voltage VCM 3  may be opposite to each other. A second phase of the second-second driving signal RDS 2  and a first phase of the fourth common voltage VCM 4  may be opposite to each other. Accordingly, the potential difference across both ends of the second coupling capacitor EMC 2  may be doubled compared to a case where the third or fourth common voltage VCM 3  or VCM 4  has a constant potential. The current flowing through the second coupling capacitor EMC 2  may be doubled compared to a case where the third or fourth common voltage VCM 3  or VCM 4  has a constant potential. The second coupling capacitor EMC 2  may improve sensing sensitivity at the other end of the sensing electrodes RE. 
     The touch driver  400 , during the discharging period of the electromagnetic sensing period EMR, may supply the third common voltage VCM 3  to the third common voltage line VCL 3 , and may supply the fourth common voltage VCM 4  to the fourth common voltage line VCL 4 . During the discharging period, each of the third and fourth common voltage lines VCL 3  and VCL 4  may have a constant potential. The touch driver  400  may receive a first sensing signal from the sensing electrode RE disposed on one side of the specific point PT, and may receive a second sensing signal from the sensing electrode RE disposed on the other side of the specific point PT. The touch driver  400  may determine whether the input of the input member  20  has been made based on the differential sensing signal SER obtained by amplifying the voltage difference between the first and second sensing signals. 
     Accordingly, the display device  10 , during the charging period of the electromagnetic sensing period EMR, may supply the second-first driving signal RDS 1  having a first phase and the second-second driving signal RDS 2  having a second phase, the third common voltage VCM 3  having the second phase, and the fourth common voltage VCM 4  having the first phase, so that the sensing sensitivity at the other end of the sensing electrodes RE may be improved. The display device  10  may sense the touch of the input member  20  by using the touch sensing unit TSU that senses the touch of the user&#39;s body, and may increase the reliability of the sensor over the entire area of the touch sensor area TSA.