Patent Publication Number: US-2022229508-A1

Title: Input sensing unit and display apparatus including the same

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 16/556,340, filed on Aug. 30, 2019, which claims priority from and the benefit of Korean Patent Application No. 10-2018-0109298, filed on Sep. 12, 2018, and Korean Patent Application No. 10-2018-0129178, filed on Oct. 26, 2018, each of which is hereby incorporated by reference for all purposes as if fully set forth herein. 
    
    
     BACKGROUND 
     Field 
     Exemplary embodiments of the invention relate generally to an input sensing unit and a display apparatus including the same, and more specifically, to an input sensing unit having improved electrical reliability and a display apparatus including the same. 
     Discussion of the Background 
     Various electronic devices used in multimedia devices, such as televisions, mobile phones, table computers, navigation devices, and game consoles, are being developed. Such electronic devices may include a keyboard or a mouse as an input unit. The electronic devices may also include a display apparatus. Such a display apparatus includes a display unit as an output device and an input sensing unit as an input device. 
     The above information disclosed in this Background section is only for understanding of the background of the inventive concepts, and, therefore, it may contain information that does not constitute prior art. 
     SUMMARY 
     Exemplary embodiments of the present invention provide an input sensing unit having improved external input sensitivity and a display apparatus including the same. 
     Additional features of the inventive concepts will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the inventive concepts. 
     An exemplary embodiment of the inventive concept provides an input sensing unit including: a plurality of first electrodes arranged in a first direction and each of which extends in a second direction crossing the first direction and includes a plurality of first main patterns arranged in the second direction and a plurality of connection patterns disposed between the first main patterns to connect two first main patterns adjacent to each other; a plurality of second electrodes arranged in the second direction and each of which extends in the first direction and includes a plurality of second main patterns arranged in the first direction and a is plurality of connection patterns disposed between the second main patterns to connect two second main patterns adjacent to each other; and a plurality of third electrodes arranged in the second direction, each of which extends in the first direction, and which receive an electrical signal that is different from that received by the second electrode. Each of the third electrodes includes: a plurality of third main patterns arranged in the first direction and spaced apart from the second sensing patterns in a plan view; and a plurality of connection patterns disposed between the third main patterns to connect two third main patterns adjacent to each other and spaced apart from the first connection patterns in a plan view. 
     The first connection patterns and the second connection patterns may be disposed on layers different from each other. 
     The third connection patterns and the first connection patterns may be disposed on the same layer. 
     The second main patterns and the third main patterns may be disposed on the same layer and spaced apart from each other in a plan view. 
     An opening may be defined in each of the second main patterns, and the third main patterns may be disposed in the openings, respectively. 
     The third connection patterns and the first main patterns may be disposed on layers different from each other. 
     Each of the third connection patterns may overlap at least a portion of the first electrodes in a plan view. 
     Each of the third main patterns may include: a central part; and a branch part connected to one side of the central part and protruding from the central part in the first direction, wherein each of the third connection patterns may be connected to the branch part. 
     The branch part may be provided in plurality to be respectively disposed on both sides of the central part. 
     The branch part may have a bar shape extending in the first direction. 
     The branch part may have a zigzag shape extending in the first direction. 
     The second connection patterns and the third connection patterns may have shapes different from each other. 
     Each of the third connection patterns may include a plurality of sub connection patterns arranged in the second direction and connected to the same third main pattern. 
     Each of the first connection patterns may be connected to each of the first main patterns to provide a single body. 
     Each of the first to third main patterns may include a plurality of mesh lines. 
     Each of the third connection patterns may extend along the mesh lines. 
     The first connection patterns and the third main patterns may not overlap each other. 
     The third connection patterns may overlap the first electrode and the second electrode in a plan view. 
     Each of the third electrodes may receive a ground voltage. 
     Another exemplary embodiment of the inventive concept provides a display apparatus including: a display unit including a plurality of pixels configured to display an image; 
     and an input sensing unit disposed to overlap the pixels and including a first electrode, a second electrode, and a third electrode, which receive electrical signals different from each other, each of the first electrode, the second electrode, and the third electrode including: a plurality of main patterns arranged to be spaced apart from each other; and a plurality of connection patterns is disposed between the main patterns to connect two main patterns adjacent to each other. The connection patterns of the third electrode and the connection patterns of the first electrode are spaced apart from each other in a plan view. 
     The connection patterns of the first electrode and the connection patterns of the third electrode may be disposed on the same layer. 
     The connection patterns of the first electrode and the main patterns of the first electrode may be disposed on layers different from each other, and the connection patterns of the third electrode and the main patterns of the third electrode may be disposed on layers different from each other. 
     The main patterns of the third electrode may be spaced apart from the main patterns of the first electrode in a plan view. 
     The connection patterns of the first electrode and the connection patterns of the second electrode may be disposed on layers different from each other. 
     The connection patterns of the first electrode and the connection patterns of the third electrode may overlap the main patterns of the first electrode in a plan view. 
     The main patterns of the second electrode and the main patterns of the third electrode may be arranged in the same direction. 
     A predetermined opening may be defined in each of the main patterns of the second electrode, and the main patterns of the third electrode may be disposed in the openings, respectively. 
     Each of the main patterns may include a plurality of mesh lines. 
     Each of the connection patterns of the third electrode may extend along the mesh lines. 
     Each of the pixels may include an organic light emitting element or a quantum dot light emitting element. 
     The third electrode may receive a ground voltage. 
     It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention, and together with the description serve to explain the inventive concepts. 
         FIG. 1  is a perspective view of a display apparatus according to an exemplary embodiment of the inventive concept. 
         FIGS. 2A, 2B, 2C, and 2D  are cross-sectional views of the display apparatus according to an exemplary embodiment of the inventive concept. 
         FIGS. 3A and 3B  are cross-sectional views of a display panel according to an exemplary embodiment of the inventive concept. 
         FIG. 4  is a plan view of a display unit according to an exemplary embodiment of the inventive concept. 
         FIG. 5A  is an enlarged cross-sectional view of the display unit according to an exemplary embodiment of the inventive concept. 
         FIG. 5B  is an enlarged cross-sectional view of an upper insulation layer according is to an exemplary embodiment of the inventive concept. 
         FIG. 6A  is a cross-sectional view of an input sensing unit according to an exemplary embodiment of the inventive concept. 
         FIG. 6B  is a plan view of the input sensing unit according to an exemplary embodiment of the inventive concept. 
         FIG. 6C  is an enlarged plan view illustrating a portion of an area  FIG. 6B . 
         FIG. 6D  is a plan view of an input sensing unit according to an exemplary embodiment of the inventive concept. 
         FIG. 7  is a plan view illustrating a portion of the input sensing unit according to an exemplary embodiment of the inventive concept. 
         FIGS. 8A and 8B  are cross-sectional views illustrating a portion of the input sensing unit according to an exemplary embodiment of the inventive concept. 
         FIG. 9  is a plan view illustrating a portion of an input sensing unit according to an exemplary embodiment of the inventive concept. 
         FIGS. 10A, 10B, and 10C  are plan views illustrating potions of the input sensing unit according to an embodiment of the inventive concept. 
         FIG. 11  is a plan view of an input sensing unit according to an exemplary embodiment of the inventive concept. 
         FIGS. 12A, 12B, and 12C  are plan views of an input sensing unit according to an exemplary embodiment of the inventive concept. 
         FIG. 13A  is a perspective view illustrating a coupled state of the display apparatus according to an exemplary embodiment of the inventive concept. 
         FIG. 13B  is an exploded perspective view of the display apparatus of  FIG. 13A . 
         FIGS. 14A, 14B, and 14C  are plan views illustrating a portion of constituents of  FIG. 13B . 
         FIG. 15A  is an exploded perspective view of a display apparatus according to an exemplary embodiment of the inventive concept. 
         FIG. 15B  is a plan view illustrating a portion of constituents of  FIG. 15A . 
     
    
    
     DETAILED DESCRIPTION 
     In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of various exemplary embodiments of the invention. As used herein “embodiments” are non-limiting examples of devices or methods employing one or more of the inventive concepts disclosed herein. It is apparent, however, that various exemplary embodiments may be practiced without these specific details or with one or more equivalent arrangements. In other instances, well-known structures s and devices are shown in block diagram form in order to avoid unnecessarily obscuring various exemplary embodiments. Further, various exemplary embodiments may be different, but do not have to be exclusive. For example, specific shapes, configurations, and characteristics of an exemplary embodiment may be used or implemented in another exemplary embodiment without departing from the inventive concepts. 
     Unless otherwise specified, the illustrated exemplary embodiments are to be understood as providing exemplary features of varying detail of some ways in which the inventive concepts 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 is otherwise combined, separated, interchanged, and/or rearranged without departing from the inventive concepts. 
     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 exemplary 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. Also, like reference numerals 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. To this end, the term “connected” may refer to physical, electrical, and/or fluid connection, with or without intervening elements. Further, the D 1 -axis, the D 2 -axis, and the D 3 -axis are not limited to three axes of a rectangular coordinate system, such as the x, y, and z-axes, and may be interpreted in a broader sense. For example, the D 1 -axis, the D 2 -axis, and the D 3 -axis may be perpendicular to one another, or may represent different directions that are not perpendicular to one another. For is 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,” etc. 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 without departing from the teachings of the disclosure. 
     Spatially relative terms, such as “beneath,” “below,” “under,” “lower,” “above,” “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 exemplary 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 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 is 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 and not as terms of degree, and, as such, 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 exemplary embodiments are described herein with reference to sectional and/or exploded illustrations that are schematic illustrations of idealized exemplary 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, exemplary 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, as such, are not necessarily intended to be limiting. 
     Unless otherwise defined, 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 is a part. 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 should not be interpreted in an idealized or overly formal sense, unless expressly so defined herein. 
       FIG. 1  is a perspective view of a display apparatus according to an embodiment of the inventive concept. Referring to  FIG. 1 , a display apparatus DD may display an image IM through a front surface IS. The front surface IS is parallel to a surface defined by a first directional axis DR 1  and a second directional axis DR 2 . 
     A normal direction of the front surface IS, i.e., a thickness direction of the display apparatus DD is indicated as a third directional axis DR 3 . A front surface (or a top surface) and a rear surface (or a bottom surface) of each of members or units, which will be described below, are distinguished by the third directional axis DR 3 . However, the first to third directional axes illustrated in this exemplary embodiment are only examples. Hereinafter, first to third directions may be directions indicated by the first to third directional axes DR 1 , DR 2 , and DR 3  and designated by the same reference numerals, respectively. 
     Although the display apparatus DD having a planar front surface is illustrated in an exemplary embodiment of the inventive concept, the inventive concept is not limited thereto. The display apparatus DD may include a curved front surface or a solid front surface. The solid front surface may include a plurality of display areas that indicate different directions. For example, the solid front surface may include a polygonal column-type front surface. 
     The display apparatus DD according to the current exemplary embodiment may be a rigid display apparatus. However, the inventive concept is not limited thereto. For example, the display apparatus DD according to the inventive concept may be a flexible display apparatus DD. According to this exemplary embodiment, the display apparatus DD that is capable of being applied to a mobile terminal is exemplarily illustrated. 
     Although not shown in  FIG. 1 , electronic modules, a camera module, a power module, and the like, which are mounted on a main board, may be disposed on a bracket/case together with the display apparatus DD to constitute the mobile terminal. The display apparatus DD according to the inventive concept may be applied to large-sized electronic devices such as televisions and monitors and small and middle-sized electronic devices such as tablet PC, navigation units for vehicles, game consoles, and smart watches. 
     Referring to  FIG. 1 , the front surface IS of the display apparatus DD includes an active area AA and a peripheral area NAA adjacent to the active area AA. In this exemplary embodiment, the active area AA may be an area on which the image IM is displayed, and also, the external input TC is sensed. 
     The image IM includes a still image and a dynamic image.  FIG. 1  illustrates icon images as an example of the image IM. 
     The external input TC includes a user&#39;s input TC applied from the outside. The user&#39;s input TC includes various types of external inputs, such as a portion of user&#39;s body, light, heat, a pressure, or the like. In this exemplary embodiment, the user&#39;s input TC is illustrated as a user&#39;s hand applied to the front surface. 
     However, this is merely an example. For example, the display apparatus DD may sense the user&#39;s input TC applied to a side surface or rear surface of the display apparatus DD. Here, the active area AA may be expanded up to the side surface or rear surface of the display apparatus DD. The display apparatus DD according to the inventive concept may be designed to have various shapes, but is not limited to a specific embodiment. 
     The peripheral area NAA is an area on which the image IM is not displayed, or the external input is not sensed even though an electrical signal is applied. As illustrated in  FIG. 1 , the active area AA may have a rectangular shape. The peripheral area NAA may surround the active area AA. However, the inventive concept is not limited thereto. For example, the active area AA and the peripheral area NAA may be designed differently relative to each other. 
       FIGS. 2A to 2D  are cross-sectional views of the display apparatus according to an exemplary embodiment of the inventive concept.  FIGS. 2A to 2D  illustrate cross-sections defined by the second directional axis DR 2  and the third directional axis DR 3 .  FIGS. 2A to 2D  are simply illustrated to explain a lamination relationship of functional panels and/or functional units constituting the display apparatus DD. 
     The display apparatus DD according to an exemplary embodiment of the inventive concept may include a display unit, an input sensing unit, an anti-reflection unit, and a widow. At least portions of the display panel, the input sensing sensor, the anti-reflection unit, and the window may be formed through a continuous process, and at least portions may be coupled to each other through an adhesion member.  FIGS. 2A to 2D  illustrate an optically clear adhesive (OCA) as an example of the adhesion member. Hereinafter, the adhesion member may include a general adhesive or adhesive agent. In the inventive concept, the anti-reflection unit and the window may be replaced with different constituents or omitted entirely. 
     In  FIGS. 2A to 2D , a corresponding constituent of the input sensing sensor, the anti-reflection unit, and the window, which is formed with respect to the other constituent through the continuous process, may be expressed as a “layer.” A constituent of the input sensing unit, the anti-reflection unit, and the window, which is coupled to the other constituent through the adhesion member, may be expressed as a “panel.” The “panel” may include a base layer providing a base surface, for example, a synthetic film, a complex material film, a glass substrate, and the like, but the base layer may be omitted in the “layer”. That is to say, the units expressed as the “layer” may be disposed on the base surface provided by the other unit. 
     The display unit, the input sensing unit, the anti-reflection unit, and the window may be referred to as a display panel DP, an input sensing panel ISP, an anti-reflection panel RPP, and a window panel WP or a display panel DP, an input sensing layer ISL, an anti-reflection layer RPL, and a window layer WL. 
     As illustrated in  FIG. 2A , the display apparatus DD may include a display panel DP, an input sensing layer ISL, an anti-reflection panel RPP, and a window panel WP. The input sensing layer ISL is directly disposed on the display panel DP. In this disclosure, “a constituent B is directly disposed on a constituent A” may mean that a separate adhesive layer/adhesive member is not disposed between the constituents A and B. The constituent B may be formed through the continuous process on the base surface provided by the constituent A after the constituent A is formed. 
     The display panel DP and the input sensing layer ISL directly disposed on the display panel DP may be defined as a display module DM. An optically clear adhesive (OCA) is disposed between the display module DM and the anti-reflection panel RPP and between the anti-reflection panel RPP and the window panel WP. 
     The display panel DP generates an image, and the input sensing layer ISL acquires coordinate information of an external input (for example, a touch event). Although not separately shown, the display module DM according to the inventive concept may further include a protection member disposed on a bottom surface of the display panel DP. The protection member and the display panel DP may be coupled to each other through an adhesion member. The display apparatus DD of  FIGS. 2B to 2D , which will be described below, may also further include the protection member. 
     The display panel DP according to an exemplary embodiment of the inventive concept may be an emission type display panel, but is not limited thereto. For example, the display panel DP may be an organic light emitting display panel or a quantum dot light emitting display panel. The organic light emitting display panel may include an organic light emitting material. A light emitting layer of the quantum dot light emitting display panel may include a quantum dot light emitting element, such as a quantum dot, a quantum rod, and the like. Hereinafter, the display panel DP may be described as the organic light emitting display panel. 
     The anti-reflection panel RPP reduces reflectance of external light incident from an upper side of the window panel WP. The anti-reflection panel RPP according to an exemplary embodiment of the inventive concept may include a retarder and a polarizer. The retarder may be a film type or liquid crystal coating type retarder, and may include a λ/2 retarder and/or a λ/4 retarder. The polarizer may also be a film type or liquid crystal coating type polarizer. The film type may include an elongation-type synthetic resin, and the liquid crystal coating type may include liquid crystals that are arranged in a predetermined arrangement. Each of the retarder and the polarizer may further include a protection film. The retarder and polarizer itself or the protection film may be defined as a base layer of the anti-reflection panel RPP. 
     The anti-reflection panel RPP according to an exemplary embodiment of the inventive concept may include color filters. The color filters may have predetermined arrangement. The color filters may be determined in arrangement in consideration of colors of light emitted from pixels provided in the display panel DP. The anti-reflection panel RPP may further include a black matrix adjacent to the color filters. 
     The anti-reflection panel RPP according to an exemplary embodiment of the inventive concept may include a destructive interference structure. For example, the destructive interference structure include first reflection layer and a second reflection layer, which are disposed on layers different from each other. First reflected light and second reflected light, which are respectively reflected from the first reflection layer and the second reflection layer, may destructively interfere, and thus, reflectance of the external light may be reduced. 
     The window panel WP according to an exemplary embodiment of the inventive concept includes a base layer WP-BS and a light blocking pattern WP-BZ. The base layer WP-BS may include a glass substrate and/or a synthetic film. The base layer WP-BS is not limited to a single layer. The base layer WP-BS may include two or more films that are coupled to each other through the adhesion member. 
     The light blocking pattern WP-BZ partially overlaps the base layer WP-BS. The light blocking pattern WP-BZ is disposed on a rear surface of the base layer WP-BS, particularly,corresponding to the peripheral area NAA of the display apparatus DD. An area on which the light blocking pattern WP-BZ is not disposed may be corresponding to the active area AA of the display apparatus DD. 
     The light blocking pattern WP-BZ may be a colored organic film, for example, which is formed in a coating manner. Although not shown, the window panel WP may further include a functional coating layer disposed on an entire surface of the base layer WP-BS. The functional coating layer may include an anti-fingerprint layer, an anti-reflection layer, a hard coating layer, and the like. Hereinafter, referring to  FIGS. 2B to 2D , the window panel WP and the window layer WL will be simply illustrated without distinguishing the base layer WP-BS and the light blocking pattern WP-BZ from each other. 
     As illustrated in  FIGS. 2B and 2C , the display apparatus DD may include the display panel DP, the input sensing panel ISP, the anti-reflection panel RPP, and the window panel WP. A laminated order of the input sensing panel ISP and the anti-reflection panel RPP may be changed. 
     As illustrated in  FIG. 2D , the display apparatus DD may include the display panel DP, the input sensing layer ISL, the anti-reflection layer RPL, and the window layer WL. The adhesion members may be omitted from the display apparatus DD, and the input sensing layer ISL, the anti-reflection layer RPL, and the window layer WL may be formed on the base surface provided on the display panel DP through the continuous process. A laminated order of the input sensing layer ISL and the anti-reflection panel RPP may be changed. 
       FIGS. 3A and 3B  are cross-sectional views illustrating a portion of the display apparatus DD according to an exemplary embodiment of the inventive concept. The display panel DP may correspond to a display unit that will be described later. In this exemplary embodiment, “an area corresponds to an area” may mean that the areas overlap each other and have the same surface area, but the description is not limited thereto. This will be described later in detail. 
     As illustrated in  FIG. 3A , the display panel DP may include a base layer BL, a s circuit element layer DP-CL disposed on the base layer BL, a display element layer DP-OLED, and an upper insulation layer TFL. 
     A display area AA 1  and a non-display area NAA 1  may be defined on the display panel DP. The display area AA 1  may be an area on which the image IM is displayed, and the non-display area NAA 1  may be on area on which the image IM is not displayed. The display area AA 1  and the non-display area NAA 1  may be provided to correspond to the active area AA and the peripheral area NAA of  FIG. 1 . In this exemplary embodiment, “an area corresponds to an area” may mean that the areas overlap each other and have the same surface area, but is not limited thereto. 
     The base layer BL may include at least one plastic film. The base layer BL may include a plastic substrate, a glass substrate, a metal substrate, and an organic/inorganic composite substrate. 
     The circuit element layer DP-CL includes at least one intermediate insulation layer and a circuit element. The intermediate insulation layer includes at least one intermediate inorganic film and at least one intermediate organic film. The circuit element includes signal lines, a driving circuit of the pixel, and the like. This will be described later in detail. 
     The display element layer DP-OLED may include organic light emitting diodes. The display element layer DP-OLED may further include an organic film, such as a pixel defining layer. 
     The upper insulation layer TFL may include a plurality of thin films. One portion of the thin films may be disposed to improve optical efficiency, and the other portion of the thin films may be disposed to protect the organic light emitting diodes. The upper insulation layer TFL will be described later in detail. 
     As illustrated in  FIG. 3B , the display panel DP may include a base layer BL, a circuit element layer DP-CL disposed on the base layer BL, a display element layer DP-OLED, an encapsulation layer ES, and a sealant SM coupling the base layer BL to the encapsulation layer ES. The encapsulation layer ES may be spaced a predetermined gap GP from the display element layer DP-OLED. Each of the base layer BL and the encapsulation layer ES may include a plastic substrate, a glass substrate, a metal substrate, and an organic/inorganic composite substrate. The sealant SM may include an organic adhesion member or frit. 
       FIG. 4  is a plan view of a display unit according to an embodiment of the inventive concept.  FIG. 5A  is an enlarged cross-sectional view of the display unit according to an embodiment of the inventive concept.  FIG. 5B  is an enlarged cross-sectional view of an upper insulation layer according to an embodiment of the inventive concept. The display unit DPU of  FIGS. 4 and 5A  will be described based on the display panel DP of  FIG. 3A . 
     As illustrated in  FIG. 4 , the display unit DPU may include a driving circuit GDC, a plurality of signal lines SGL (hereinafter, referred to as signal lines), a plurality of signal pads DPD (hereinafter, referred to as signal pads), and a plurality of pixels PX (hereinafter, referred to as pixels). 
     The display area AA 1  may be defined as an area on which the pixels PX are disposed. Each of the pixels PX includes an organic light emitting diode and a pixel driving circuit connected to the organic light emitting diode. The circuit element layer DP-CL of FIGS.  3 A and  3 B may include the driving circuit GDC, the signal lines SGL, the signal pads DPD, and a pixel driving circuit. 
     The driving circuit GDC may include a scan driving circuit. The scan driving circuit generates a plurality of scan signals (hereinafter, referred to as scan signals) to sequentially output the scan signals to a plurality of scan lines GL (hereinafter, referred to as scan lines) that will be described later. The scan driving circuit may further output other control signals to the driving circuit of each of the pixels PX. 
     The scan driving unit may include a plurality of thin film transistors that are manufactured through the same process as the driving circuit of the pixel PX, e.g., a low temperature polycrystalline silicon (LTPS) process or a low temperature polycrystalline oxide (LTPO) process. 
     The signal lines SGL includes scan lines GL, data lines DL, a power line PL, and a control signal line CSL. The scan lines GL are respectively connected to corresponding pixels of the pixels PX, and the data lines DL are respectively connected to corresponding pixels PX of the pixels PX. The power line PL is connected to the pixels PX. The control signal line CSL may provide control signals to the scan driving circuit. 
     The signal lines SGL overlaps the display area AA 1  and the non-display area NAA 1 . The signal lines SGL may include a pad part and a line part. The line part overlaps the display area AA 1  and the non-display area NAA 1 . The pad part is connected to an end of the line part. The pad part is disposed on the non-display area NAA 1  to overlap a corresponding signal pad of the signal pads DPD. An area of the non-display area NAA 1 , on which the signal pads DPD are disposed, may be defined as a pad area DP-PA. The pad area DP-PA may be connected to a circuit board (not shown). 
     Substantially, the line part connected to the pixel PX may constitute most of the signal lines SGL. The line part is connected to the transistors TR 1  and TR 2  (see  FIG. 5A ) of the pixel PX. The line part may have a single/multilayered structure. The line part may be a single body or include two or more portions. The two or more portions may be disposed on layers different from each other and connected to each other a contact hole passing through the insulation layer disposed between the two portions. 
       FIG. 5A  illustrates a partial cross-section of the display panel DP corresponding to the transistors TR 1  and TR 2  and the light emitting element ELD. The circuit element layer DP-CL disposed on the base layer BL includes at least one insulation layer and a circuit element. The circuit element includes the signal line and the driving circuit of the pixel. The circuit element layer DP-CL may be formed through a process of forming an insulation layer, a semiconductor layer, and a conductive layer by coating or deposition and a process of patterning the insulation, the semiconductor layer, and the conductive layer by a photolithography process. 
     In this exemplary embodiment, the circuit element layer DP-CL may include a buffer layer BFL, a first intermediate inorganic layer  10 , and a second intermediate inorganic layer  20 , which are inorganic layers, and an intermediate organic layer  30  that is an organic layer. The buffer layer BFL may include a plurality of inorganic layers.  FIG. 5A  illustrates an example of an arrangement relationship between a first semiconductor pattern OSP 1 , a second semiconductor pattern OSP 2 , a first control electrode GE 1 , a second control electrode GE 2 , a first input electrode DE 1 , a second output electrode SE 1 , a second input electrode DE 2 , and a second output electrode SE 2 , which constitute the switching transistor TR 1  and the driving transistor TR 2 . First to fourth through-holes CH 1  to CH 4  are illustrated exemplarily. 
     The display element layer DP-OLED may include a light emitting element ELD. In this exemplary embodiment, the light emitting element ELD is provided as an example of the organic light emitting element. However, this is merely an example. For example, the light emitting element ELD may include various examples, such as electrophoretic devices, electro-wetting devices, liquid crystal capacitors, quantum dot diodes, nano-LEDs, micro-LEDs, and the like. 
     The display element layer DP-OLED includes a pixel defining layer PDL. The pixel defining layer PDL includes an insulation material. For example, the pixel defining layer PDL may be an organic layer. 
     A first electrode AE of the light emitting element ELD is disposed on the intermediate organic layer  30 . The first electrode AE of the light emitting element ELD is connected to the second output electrode SE 2  through the fifth through-hole CH 5  passing through the intermediate organic layer  30 . An opening OP is defined in the pixel defining layer PDL. The opening OP of the pixel defining layer PDL exposes at least a portion of the first electrode AE of the light emitting element ELD. The opening OP of the pixel defining layer PDL is called as a light emitting opening to be distinguished from other openings. 
     As illustrated in  FIG. 5A , the display area AA 1  may include an emission area PXA and a non-emission area NPXA adjacent to the emission area PXA. The non-emission area NPXA may surround the emission area PXA. In the current exemplary embodiment, the emission area PXA may be defined to correspond to a portion of the first electrode AE of the light emitting element ELD exposed by the light emitting opening OP. 
     A hole control layer HCL may be commonly disposed on the emission area PXA and the non-emission area NPXA. The hole control layer HCL may include a hole transport layer and may further include a hole injection layer. The emission layer EML is disposed on the hole control layer HCL. The emission layer EML may be disposed on an area corresponding to the light emitting opening OP. That is, the emission layer EML may be formed to be separated from each of the pixels PX. Also, the emission layer EML may include an organic material and/or an inorganic material. The emission layer EML may generate light having a predetermined color. 
     An electron control layer ECL is disposed on the emission layer EML. The electron control layer ECL may include an electron transport layer and may further include an electron injection layer. The hole control layer HCL and the electron control layer ECL may be formed commonly formed on the plurality of pixels by using an open mask. A second electrode CE of the light emitting element ELD is disposed on the electron control layer ECL. The second electrode CE of the light emitting element ELD is provided as a single body and commonly disposed on the plurality of pixels. 
     As illustrated in  FIGS. 5A and 5B , the upper insulation layer TFL is disposed on the second electrode CE of the light emitting element ELD. The upper insulation layer TFL may include a plurality of thin films. According to this exemplary embodiment, the upper insulation layer TFL may include a capping layer CPL and a thin film encapsulation layer TFE. The thin film encapsulation layer TFE may include a first inorganic layer IOL 1 , an organic layer OL, and a second inorganic layer IOL 2 . 
     The capping layer CPL is disposed on the second electrode CE of the light emitting element ELD to contact the second electrode CE of the light emitting element ELD. The capping layer CPL may include an organic material. The first inorganic layer IOL 1  is disposed on the capping layer CPL to contact the capping layer CPL. The organic layer OL is disposed on the first inorganic layer IOL 1  to contact the first inorganic layer IOL 1 . The second inorganic layer IOL 2  may be disposed on the organic layer OL to contact the organic layer OL. 
     The capping layer CPL may protect the second electrode CE of the light emitting element ELD from a follow-up process, for example, a sputtering process and improve emission efficiency of the light emitting element ELD. The capping layer CPL may have a refractive index greater than that of the first inorganic layer IOL 1 . 
     The first inorganic layer IOL 1  and the second inorganic layer IOL 2  may protect the display element layer DP-OLED from oxygen/moisture, and the organic layer may protect the display element layer DP-OLED from foreign substances such as dust particles. Each of the first inorganic layer IOL 1  and the second inorganic layer IOL 2  may be one of a silicon oxide layer, a silicon nitride layer, a silicon oxynitride layer, and a silicon oxide layer. According to an exemplary embodiment, each of the first inorganic layer IOL 1  and the second inorganic layer IOL 2  may include a titanium oxide layer, an aluminum oxide layer, and the like. The organic layer OL may include an acrylic-based organic layer, but is not limited thereto. 
     According to an exemplary embodiment of the inventive concept, an inorganic layer, for example, a lithium fluoride (LiF) layer may be further disposed between the capping layer CPL and the first inorganic layer IOL 1 . The LiF layer may improve emission efficiency of the light emitting element ELD. 
       FIG. 6A  is a cross-sectional view of an input sensing unit according to an exemplary embodiment of the inventive concept.  FIG. 6B  is a plan view of the input sensing unit according to an exemplary embodiment of the inventive concept.  FIG. 6C  is an enlarged plan view illustrating a portion of an area  FIG. 6B .  FIG. 6D  is a plan view of an input sensing unit according to an exemplary embodiment of the inventive concept. Hereinafter, the present disclosure will be described with reference to  FIGS. 6A to 6D . 
     As illustrated in  FIG. 6A , the input sensing unit ISU may include a first insulation layer IS-IL 1 , a second conductive layer IS-CL 1 , a second insulation layer IS-IL 2 , a second conductive layer IS-CL 2 , and a third insulation layer IS-IL 3 . The first insulation layer IS-IL 1  may be directly disposed on the upper insulation layer TFL. In the inventive concept, the first insulation layer IS-IL 1  may be omitted. 
     Each of the first conductive layer IS-CL 1  and the second conductive layer IS-CL 2  may have a single-layer structure or a multi-layer structure in which a plurality of layers are stacked in the third directional axis DR 3 . The conductive layer having the multilayer structure may include at least two of the transparent conductive layers and the metal layers. The conductive layer having the multilayer structure may include metal layers including metals different from each other. The transparent conductive layer may include indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), or indium tin zinc oxide (ITZO), PEDOT, a metal nano wire, and graphene. The metal layer may be formed of molybdenum, silver, titanium, copper, aluminum, and an alloy thereof. For example, each of the first and second conductive is layers IS-CL 1  and IS-CL 2  may have a three-layered metal structure, for example, a three-layered structure of titanium/aluminum/titanium. 
     Each of the first and second conductive layers IS-CL 1  and IS-CL 2  may include a plurality of conductive patterns. Hereinafter, an example in which the first conductive layer IS-CL 1  includes first conductive patterns, and the second conductive layer IS-CL 2  includes second conductive patterns will be described. Each of the first and second conductive patterns may include sensing electrodes and signal lines connected to the sensing electrodes. 
     Each of the first and second insulation layers IS-IL 1  and IS-IL 2  may include an inorganic or organic material. In this exemplary embodiment, each of the first and second insulation layers IS-IL 1  and IS-IL 2  may be an inorganic layer including an inorganic material. The inorganic layer may include at least one of oxide, titanium oxide, silicon oxide, silicon oxide nitride, zirconium oxide, or hafnium oxide. The third insulation layer IS-IL 3  may include an organic material. The organic layer may include at least one of an acrylic-based resin, a methacrylic-based resin, a polyisoprene-based resin, a vinyl-based resin, an epoxy-based resin, a urethane-based resin, a cellulose-based resin, a siloxane-based resin, a polyimide-based resin, a polyamide-based resin, or a perylene-based resin. 
     Referring to  FIGS. 6B and 6C , the input sensing unit ISU is disposed on the base substrate BS. The input sensing unit ISU may be disposed on the display unit DPU or the display panel DP, may be disposed between the display unit DPU and the base substrate BS, or disposed to be spaced apart from the display unit DPU with the base substrate BS therebetween. 
     The input sensing unit ISU provides a front surface IS 2  including a sensing area AA 2  and a second peripheral area NAA 2 . The sensing area AA 2  may correspond to the active area AA (see  FIG. 1 ) of the display apparatus DD (see  FIG. 1 ). The second peripheral area NNA 2  may correspond to the peripheral area NAA (see  FIG. 1 ) of the display apparatus DD. In this exemplary embodiment, the display area AA 1  (see  FIG. 3A ) and the sensing area AA 2  may correspond to each other. 
     However, this is merely an example. For example, the display area AA 1  and the sensing area AA 2  may partially overlap each other. The active area AA may be an area that is substantially defined by projecting the display area AA 1  and the sensing area AA 2 . Thus, the active area AA may include all of the display area AA 1  and the sensing area AA 2 . 
     The input sensing unit ISU includes a plurality of first electrodes TE 1 , a plurality of second electrodes TE 2 , a plurality of third electrodes TE 3 , a plurality of sensing lines TL 11 , TL 12 , TL 2 , and LT 3 , and a plurality of sensing pads T 11 , T 12 , T 2 , and T 3 . For convenience of description, portions of the electrodes are illustrated to be shaded so that the first electrodes TE 1 , the second electrodes TE 2 , and third electrodes TE 3  are distinguished from each other. 
     The first electrodes TE 1 , the second electrodes TE 2 , and the third electrodes TE 3  are disposed on the sensing area AA 2 . As described above, the sensing area AA 2  may overlap the display area AA 1  of the display unit DPU and correspond to the active area AA of the display apparatus DD. 
     The sensing lines TL 11 , TL 12 , TL 2 , and TL 3  and the sensing pads T 11 , T 12 , T 2 , and T 3  are disposed on the peripheral area NAA 2 . As described above, the second peripheral area AA 2  may overlap the first peripheral area NAA 1  of the display unit DPU and correspond to the peripheral area NAA of the display apparatus DD. 
     The sensing lines TL 11 , TL 12 , TL 2 , and TL 3  may include a plurality of first sensing lines TL 11  and TL 12 , a plurality of second sensing lines TL 2 , and a third sensing line TL 3 . The sensing pads T 11 , T 12 , T 2 , and T 3  include a plurality of first sensing pads T 11  and T 12 , a plurality of second sensing pads T 2 , and a third sensing pad T 3 . The sensing lines TL 11 , TL 12 , TL 2 , and TL 3  are connected to corresponding pads of the sensing pads T 11 , T 12 , T 2 , and T 3 , respectively. 
     The first electrodes TE 1  are arranged in the first direction DR 1 . Each of the first electrodes TE 1  extends in the second direction DR 2 . Each of the first electrodes TE 1  may include a plurality of main patterns SP 1  and a plurality of connection patterns BP 1 . 
     Each of the first main patterns SP 1  and the first connection patterns BP 1  may be arranged in the second direction DR 2 . Each of the first main patterns SP 1  has a diamond shape. However, this is merely an example. For example, each of the first main patterns SP 1  is not limited to a specific shape. 
     Each of the first connection patterns BP 1  is disposed between the first main patterns SP 1 . Each of the first connection patterns BP 1  connects two first main patterns SP 1  adjacent to each other. The first main patterns SP 1  are electrically connected through the first connection patterns BP 1 . 
     In this exemplary embodiment, the first connection patterns BP 1  are disposed on a layer different from that of the first main patterns SP 1 . Each of the first connection patterns BP 1  may partially overlap the first main patterns SP 1 . Each of the first main patterns SP 1  may be electrically connected to the first connection patterns BP 1  by passing through a predetermined insulation layer. 
     The first sensing lines TL 1  are connected to the first electrodes TE 1 , respectively. The first sensing lines TL 1  connect the first electrodes TE 1  to the pads, which correspond to the first electrodes TE 1 , of the first pads T 11  and T 12 , respectively. 
     In this exemplary embodiment, the first sensing lines TL 1  may include first sub lines TL 11  and second sub lines TL 12 . The first sub lines TL 11  connect a portion of the first electrodes TE 1  to a portion T 11  of the first pads T 11  and T 12 . The second sub lines TL 12  connect a remaining portion of the first electrodes TE 1  to a remaining portion T 12  of the first pads T 11  and T 12 . 
     For convenience of description,  FIG. 6C  illustrates three first sensing lines L 11 , L 12 , and L 13  of the first sensing lines TL 1 . The three first sensing lines L 11 , L 12 , and L 13  are connected to corresponding first electrodes TE 1 , respectively. 
     The first sensing lines TL 1  may respectively transmit electrical signals provided through the first pads T 11  and T 12  to the first electrodes TE 1  or may transmit electrical signals provided from the first electrodes TE 1  to the outside through the first pads T 11  and T 12 . However, this is merely an example. For example, the first pads T 11  and T 12  may be continuously arranged on one side of the display panel pads DPD, but the inventive concept is not limited to this specific arrangement. 
     Referring again to  FIGS. 6B and 6C , the second electrodes TE 2  are arranged in the second direction DR 2 . Each of the second electrodes TE 2  extends in the first direction DR 1 . Each of the second electrodes TE 2  may include a plurality of second main patterns SP 2  and a plurality of second connection patterns BP 2 . 
     Each of the second main patterns SP 2  and the second connection patterns BP 2  may be arranged in the first direction DR 1 . Each of the first main patterns SP 1  and the second main patterns SP 2  has a diamond shape. However, this is merely an example. For example, in the inventive concept, the shape of each of the first main patterns SP 1  and the second main patterns SP 2  is not so limited. 
     Each of the second connection patterns BP 2  is disposed between the second main patterns SP 2 . Each of the second connection patterns BP 2  connects two second main patterns SP 1  adjacent to each other. The second main patterns SP 2  are electrically connected through the second connection patterns BP 2 . 
     In this exemplary embodiment, the second connection patterns BP 2  are disposed on the same layer as the second main patterns SP 2  and are thus, provided as a single body. Thus, the second electrodes TE 2  may be provided as a single body that extending in the first direction DR 1 . However, this is merely an example. For example, the second connection patterns BP 2  may be disposed on a layer different from that of the second main patterns SP 2 , but the inventive concept is not so limited. 
     The second sensing lines TL 2  are connected to the second electrodes TE 2 , respectively. The second sensing lines TL 2  connect the second electrodes TE 2  to the second sensing pads T 2 . 
     For convenience of description,  FIG. 6C  illustrates N second sensing lines L 21 , L 22 , L 23 , L 24 , and L 2 N of the second sensing lines TL 2 . The second sensing lines L 21 , L 22 , L 23 , L 24 , and L 2 N are connected to corresponding second electrodes TE 2 , respectively. The N number may correspond to the number of second electrodes TE 2  provided in the input sensing unit ISU. 
     The second sensing lines TL 2  may transmit electrical signals provided through the second sensing pads T 2  and T 12  to the second electrodes TE 2 , or may transmit electrical signals provided from the second electrodes TE 2  to the outside through the second sensing pads T 2 . 
     The second electrodes TE 2  may receive an electrical signal different from that applied to the first electrodes TE 1 . Here, the second electrodes TE 2  may generate electric fields together with the first electrodes TE 1 . For example, the first electrodes TE 1  may receive driving signals, and the second electrodes TE 2  may receive sensing signals. The input sensing unit ISU may operate in a mutual cap manner in which an external input TC (see  FIG. 1 ) is sensed through a variation in capacitance formed between the second electrodes TE 2  and the first electrodes TE 1 . 
     Alternatively, the second electrodes TE 2  may receive the same type of electrical signals as the first electrodes TE 1 . For example, the first electrodes TE 1  and the second electrodes TE 2  may receive sensing signals. The input sensing unit ISU may operate in a self-cap manner in which information of the external input TC is sensed through a change in sensing signal according to the external input TC. 
     Referring again to  FIGS. 6B and 6C , the third electrodes TE 3  are arranged in the second direction DR 2 . Each of the third sensing electrodes TE 2  extends in the first direction DR 1 . In this exemplary embodiment, the third electrodes TE 3  may extend and be arranged in parallel to the second electrode TE 2 . 
     Each of the third electrodes TE 3  may include a plurality of third main patterns SP 3  and a plurality of third connection patterns BP 3 . Each of the third main patterns SP 3  and the third connection patterns BP 3  may be arranged in the first direction DR 1 . 
     The third main patterns SP 3  may be disposed inside the second main patterns SP 2 . In this exemplary embodiment, the third main patterns SP 3  may be respectively disposed in predetermined openings SP-OP respectively defined in the second main patterns SP 2 . 
     The third main patterns SP 3  may be accommodated in the openings SP-OP and spaced apart from the second main patterns SP 2  in a plan view. In this exemplary embodiment, the third main patterns SP 3  and the second main patterns SP 2  may not overlap each other in a plan view. In this exemplary embodiment, each of the third main patterns SP 3  may be surrounded by each of the second main patterns SP 2 . 
     Each of the third main patterns SP 3  may include a first portion MP and a second portion PP. The first portion MP may have a shape similar to that of each of the second main patterns SP 2 . In this exemplary embodiment, the first portion MP may have a diamond shape having a size less than that of each of the second main patterns SP 2 . 
     The second portion PP is connected to one side of the first portion MP. The second portion PP may have a bar shape extending in the first direction DR 1  as an example. In this exemplary embodiment, the second portion PP may be provided in plurality and connected to both sides opposed to each other in the first direction DR 1 . 
     Each of the third connection patterns BP 3  is disposed between the third main patterns SP 3 . Each of the third connection patterns BP 3  connects two third main patterns SP 3  adjacent to each other. The third main patterns SP 3  are electrically connected through the third connection patterns BP 3 . However, this is merely an example. For example, the third electrodes TE 3  may be arranged in the first direction DR 1 , but the inventive concept is not so limited. 
     The third connection patterns BP 3  may be spaced apart from the first connection patterns BP 1  in a plan view. The third connection patterns BP 3  may be disposed so that the third connection patterns BP 3  do not overlap the first connection patterns BP 1  in a plan view. Each of the third connection patterns BP 3  according to this exemplary embodiment may have a shape that is bent at least once in the first direction DR 1 . In this exemplary embodiment, each of the third connection patterns BP 3  has a shape that is bent once. 
     Each of the third connection patterns BP 3  may be spaced apart from the first connection patterns BP 1  through the bent shape thereof to overlap the first main patterns SP 1  in a plan view. Since each of the third connection patterns BP 3  according to the inventive concept has the bent shape, the third connection patterns BP 3  may be stably connected to the third main patterns SP 3  without interfering with the second connection patterns BP 2 . 
     The third sensing line TL 3  is connected to the third electrodes TE 3 , respectively. The third sensing line TL 3  connects the third pad T 3  to the third electrodes TE 3 . In this exemplary embodiment, each of the third pad T 3  and the third sensing line TL 3  is provided as a single body. The third electrodes TE 3  may receive a ground voltage through the third pad T 3 . 
     According to an exemplary embodiment of the inventive concept, the input sensing unit ISU may further include a third electrode TE 3  receiving the ground voltage. Thus, a signal failure such as noise in the input sensing unit ISU by the electrical signal provided to the display unit DPU may be prevented from occurring. Thus, deterioration in sensitivity of the input sensing unit ISU may be easily prevented. 
     Also, according to the inventive concept, the third connection patterns BP 3  constituting the third electrode TE 3  may be designed so that the third connection patterns BP 3  do not overlap the first connection patterns BP 1  disposed on the same layer to prevent the third electrode TE 3  and the first electrode TE 1  from interfering with each other. Thus, electrical reliability of the input sensing unit ISU may be improved. 
     As illustrated in  FIG. 6D , in the input sensing unit ISU, each of the third sensing line TL 3  and the third pad T 3  may be provided in plurality. The plurality of third sensing units TL 3 P and the plurality of third pads T 3 P may be connected to corresponding third electrodes TE 3 , respectively. Here, the third electrodes TE 3  may receive electrical signals for sensing noise in the active area AA. According to the inventive concept, the input sensing unit ISU may be designed with various structures, but the inventive concept is not so limited. 
       FIG. 7  is a plan view illustrating a portion of the input sensing unit according to an input sensing unit ISU embodiment of the inventive concept.  FIGS. 8A and 8B  are cross-sectional views illustrating a portion of the input sensing unit according to an input sensing unit ISU embodiment of the inventive concept.  FIG. 7  illustrates an area AA′ of  FIG. 6C .  FIG. 8A  illustrates a cross-section taken along line I-I′ of  FIG. 7B , and  FIG. 8B  illustrates a cross-section taken along line II-II′ of  FIG. 7B . Hereinafter, the present invention will be described with reference to  FIGS. 7 to 8B . The same reference numeral may be given to components that are the same as those of  FIGS. 1 to 6C , and their detailed descriptions will be omitted. 
     For convenience of description,  FIG. 7  illustrates an area on which one first connection pattern BP 1 , one second connection pattern BP 2 , and one third connection pattern BP 3  are disposed. 
     The first main patterns SP 1  and the second main patterns SP 1  may be disposed on the same layer and spaced apart from each other. A predetermined space GS 1  may be defined between the first main patterns SP 1  and the second main patterns SP 2 . Although not shown, a floating pattern spaced from the first main patterns SP 1  and the second main patterns SP 2  may be further disposed in the spaced space GS 1  between the first main patterns SP 1  and the second main patterns SP 2 . 
     The second main patterns SP 2  and the third main patterns SP 3  may be disposed on the same layer and spaced apart from each other. In this exemplary embodiment, the third main patterns SP 3  may be respectively disposed on predetermined openings SP-OP defined in the second main patterns SP 2 . Thus, a predetermined space GS 2  may be defined between the second main patterns SP 2  and the third main patterns SP 3 . The second main patterns SP 2  and the third main patterns SP 3  may not overlap each other in a plan view. 
     In this exemplary embodiment, the first connection pattern BP 1  and the second connection pattern BP 2  may be disposed on a layer different from that of the first main patterns SP 1 , the second main patterns SP 2 , the second connection pattern BP 2 , and the third main patterns SP 3  with a predetermined insulation layer SIL therebetween. 
     The first connection pattern BP 1  is disposed on a layer different from that of the second connection pattern BP 2 . In this exemplary embodiment, the first connection pattern BP 1  may cross the first connection pattern BP 2  in a plan view. The first connection pattern BP 1  may be connected to the first main patterns SP 1  through a contact part CNT 1  passing through the insulation layer SIL. 
     The third connection pattern BP 3  and the first connection pattern BP 1  may be disposed on the same layer. The third connection pattern BP 3  may be connected to the third main patterns SP 3  through a contact part CNT 3  passing through the insulation layer SIL. 
     The third connection pattern BP 3  may be spaced apart from the first connection pattern BP 1  in a plan view. The third connection pattern BP 3  may not overlap the first connection pattern BP 1 . As described above, the third connection pattern BP 3  may be bent in a plan view in the first direction DR 1  so as to be spaced apart from the first connection pattern BP 1  to overlap the first main patterns SP 1 . 
     According to the inventive concept, the third connection patterns BP 3  may be connected to the third main patterns SP 3  and the first main patterns SP 1  without any possibility of an electrical short-circuit with respect to each other even though the third connection patterns BP 3  are disposed on the same layer. Thus, the input sensing unit ISU may be improved in electrical reliability. 
       FIG. 9  is a plan view illustrating a portion of an input sensing unit according to an exemplary embodiment of the inventive concept.  FIGS. 10A to 10C  are plan views illustrating potions of the input sensing unit according to an exemplary embodiment of the inventive concept; For convenience of description,  FIG. 9  illustrates an area corresponding to that of  FIG. 7 , and  FIGS. 10A to 10C  illustrate interlayer plan views of the area of  FIG. 9 . Hereinafter, the inventive concept will be described with reference to  FIGS. 9 to 10C . The same reference numeral may be given to components that are the same as those of  FIGS. 1 to 8B , and their detailed descriptions will be omitted. 
     As illustrated in  FIG. 9 , the input sensing unit ISU_M may include a plurality of mesh lines MSL. The mesh lines MSL include a first mesh line MS 1  and a second mesh line MS 2 , which extend in a direction crossing the first direction DR 1  and the second direction DR 2  and cross each other. Predetermined openings MS_OP (hereinafter, referred to as mesh openings) are defined in the mesh lines MSL. Each of the mesh openings MS_OP may correspond to the above-described emission area PXA (see  FIG. 5 ). Thus, even though the mesh lines MSL are made of an optically opaque material, an influence of the input sensing unit ISU_M on the emission area PXA may be minimized to prevent deterioration in the display characteristics of the display apparatus. 
     The mesh lines MSL may be a constituent of each of a first electrode TE 1 _M, a second electrode TE 2 _M, and a third electrode TE 3 _M. Particularly, each of first main patterns SP 1 _M, second main patterns SP 2 _M, third main patterns SP 3 _M, and a second connection pattern BP 2 _M may include the mesh lines MSL. Cut spaces of the mesh lines MSL may define boundaries between the first main patterns SP 1 _M, the second main patterns SP 2 _M, the third main patterns SP 3 _M, and the second connection pattern BP 2 _M. 
     The first connection pattern BP 1 _M may be provided in plurality in the first direction DR 1 . The first connection pattern BP 1 _M may include a portion that is bent in the second direction DR 2 . Thus, the first connection pattern BP 1 _M may not overlap the second connection pattern BP 2 _M in a plan view and may overlap the second main pattern SP 2 _M in a plan view. 
     The third connection pattern BP 3 _M is disposed to be spaced apart from the first connection pattern BP 1 _M. The second connection pattern BP 3 _M may be provided in plurality in the second direction DR 2 . The third connection pattern BP 1 _M may include a portion that is bent in the first direction DR 1 . Thus, the third connection pattern BP 3 _M may not overlap the second connection pattern BP 2 _M and the first connection pattern BP 1 _M in a plan view and may overlap the first main patterns SP 1 _M in a plan view. 
     According to the inventive concept, the first connection pattern BP 1 _M and the third connection pattern BP 3 _M are disposed on a layer different from that of the mesh lines MSL. Referring to  FIGS. 10A to 10C , the first connection pattern BP 1 _M and the third connection pattern BP 3 _M may constitute a first layer LY 1 , the mesh lines MSL may constitute a third layer LY 3 , and the contact parts CNT 1  M and CNT 3 _M may constitute a second layer LY 2 . 
     Particularly, the first connection pattern BP 1 _M and the third connection pattern BP 3 _M are disposed on the first layer LY 1 . The first layer LY 1  may be a layer disposed below the insulation layer SIL (see  FIG. 8A ). The first connection pattern BP 1 _M and the third connection pattern BP 3 _M may be separated from the first main patterns SP 1 _M, the second main patterns SP 2 _M, the third main patterns SP 3 _M, and the second connection pattern BP 2 _M and then provided as different layers. 
     The first connection pattern BP 1 _M and the third connection pattern BP 3 _M may extend along the mesh lines MSL. Each of the first connection pattern BP 1 _M and the third connection pattern BP 3 _M may have a shape corresponding to the mesh lines MSL. Thus, each of the first connection pattern BP 1 _M and the third connection pattern BP 3 _M may have a shape formed by removing a portion of the mesh lines MSL. Thus, an influence of the first connection pattern BP 1 _M and the third connection pattern BP 3 _M on the emission area PXA may be reduced. 
     The second layer LY 2  may correspond to the insulation layer SIL. The insulation layer SIL in which the contact parts CNT 1  M and CNT 3 _M are defined may be disposed on the first connection pattern BP 1 _M and the third connection pattern BP 3 _M. The contact parts CNT 1 _M and CNT 3 _M may be defined to pass through an area, on which connection between the insulation layer SIL and the mesh lines MSL is required, of the area overlapping the first connection pattern BP 1 _M and the third connection pattern BP 3 _M. 
     The third layer LY 3  may be a layer disposed on the insulation layer SIL. The mesh lines MSL are disposed on the insulation layer SIL. That is, each of the first main patterns SP 1 _M, the second main patterns SP 2 _M, the third main patterns SP 3 _M, and the second connection pattern BP 2 _M may be disposed on the uppermost layer of the input sensing unit ISU_M. Portions of the first main patterns SP 1 _M, the second main patterns SP 2 _M, the third main patterns SP 3 _M, and the second connection pattern BP 2 _M, which overlap the contact parts CNT 1 _M and CNT 3 _M, may pass through the insulation layer SIL and be connected to the first connection pattern BP 1 _M and the third connection pattern BP 3 _M. 
     The input sensing unit ISU_M according to an exemplary embodiment of the inventive concept may further include floating patterns FL disposed inside the first main patterns SP 1 _M. The floating patterns FL may be disposed in predetermined openings defined in the first main patterns SP 1 _M. The floating patterns FL are disposed to be spaced apart from the first main patterns SP 1 _M. According to the inventive concept, since the floating patterns FL are further provided, it may be difficult to distinguish the second electrodes TE 2 _M 1  and the first electrodes TE 1 _M, which are disposed on the third main patterns SP 3 _M, from each other. Thus, the visibility of the input sensing unit ISU_M may be improved. 
     In addition, according to the inventive concept, since the floating patterns FL are further provided, deterioration in sensitivity of the input sensing unit ISU_M according to the electrical signal applied to the display unit DPU may be prevented. Thus, the input sensing unit ISU_M may be improved in electrical reliability. 
       FIG. 11  is a plan view of an input sensing unit according to an exemplary embodiment of the inventive concept.  FIGS. 12A to 12C  are plan views of an input sensing unit according to an exemplary embodiment of the inventive concept.  FIG. 12A  illustrates an enlarged view of an area BB′ of  FIG. 11 , and  FIG. 12B  illustrates an enlarged view of a portion of the area of  FIG. 12A .  FIG. 12C  illustrates an enlarged plan view of an area CC&#39; of  FIG. 11 . Hereinafter, the inventive concept will be described with reference to  FIGS. 11 to 12C . The same reference numeral may be given to components that are the same as those of  FIGS. 1 to 10C , and their detailed descriptions will be omitted. 
       FIG. 11  illustrates a portion of an area of the input sensing unit ISU_M 1  on the basis of an area on which a first connection pattern BP 1 _M 1 , a second connection pattern BP 2 _M 1 , and a third connection pattern BP 3 _M 1  are disposed. Also,  FIG. 11  illustrates a portion of two first main patterns SP 1 _M 1  disposed to be spaced apart from each other with the first connection pattern BP 1 _M 1  therebetween in the second direction DR 2 , a portion of two second main patterns SP 2 _M 1  disposed to be spaced apart from each other with the second connection pattern BP 2 _M 1  therebetween in the first direction DR 1 , and a portion of two third main patterns SP 3 _M 1  disposed to be spaced apart from each other with the third connection pattern BP 3 _M 1  in the second direction DR 2 . The input sensing unit ISU_M 1  according to inventive concept includes a plurality of mesh lines MSL. 
     As illustrated in  FIGS. 11 and 12A , in the input sensing unit ISU_M 1 , each of the first connection pattern BP 1 _M 1  and the third connection pattern BP 3 _M 1  may have various shapes. For example, the first connection pattern BP 1 _M 1  may be provided in plurality to be spaced apart from each other in the first direction DR 2  so as to be respectively connected to the first main patterns SP 1 _M 1 . 
     Each of the first connection patterns BP 1 _M 1  extends along a portion of the mesh lines MSL. Thus, each of the first connection patterns BP 1 _M 1  may not overlap mesh openings MS_OP and substantially expose the emission areas PXA. Thus, deterioration in display characteristic of the display apparatus due to lamination with the input sensing unit ISU_M may be prevented. 
     The third connection pattern BP 3 _M 1  extends along a portion of the mesh lines MSL. The third connection pattern BP 3 _M 1  may be spaced apart from the first connection pattern BP 1 _M 1  in a plan view.  FIG. 12B  illustrates an enlarged view of a portion of the area of  FIG. 12A , which is adjacent to the third connection pattern BP 3  Ml, the first connection pattern BP 1 _M 1 , and the second connection pattern BP 2 _M 1 . 
     Referring to  FIGS. 12A and 12B , the third connection pattern BP 3 _M 1  may be spaced apart from the first connection pattern BP 1 _M 1  in a plan view. The third connection pattern BP 1 _M 1  may partially overlap the first main patterns SP 1 _M 1  in a plan view. According to the inventive concept, electrical short-circuits between the third connection pattern BP 3 _M 1  and the first connection pattern BP 1  Ml, which are disposed on the same layer, may be prevented. 
     Also, the third connection pattern BP 3  M 1  may be bent so that the third connection pattern BP 3  M 1  does not overlap the second connection pattern BP 2 _M 1  in a plan view. The third connection pattern BP 3  M 1  may have a shape that is bent at least once in the first direction DR 1 . In this embodiment, the third connection pattern BP 3  M 1  may have a zigzag shape that is bent several times in the first direction DR 1 . According to the inventive concept, since the third connection pattern BP 3  M 1  is designed to have the bent shape, a non-overlapping portion between the third connection pattern BP 3  M 1  and the first connection pattern BP 1 _M 1  may increase to easily prevent interference with the emission area PXA. 
     Referring to  FIGS. 11 and 12C , each of the third main patterns SP 3 _M 1  may include a first portion MP 1  and a second portion PP 1 . Each of the first portion MP 1  and the second portion PP 1  may be disposed to be spaced a predetermined distance from the second main patterns SP 2 _M 1 . 
     The second portion PP 1  may have a shape that is bent at least once in the first direction DR 1 . The second portion PP 1  according to this exemplary embodiment may have a zigzag shape extending in the first direction DR 1 . According to the inventive concept, the second portion PP 1  may be designed to be bent several times, thereby preventing a boundary between the third main patterns SP 3 _M 1  and the second main patterns SP_M 1 , which are disposed inside the second main patterns SP 2 _M 1 , for example, a space GS 1 _M 1  from easily visible. Also, it may be difficult to distinguish the third main patterns SP 3 _M 1  from the second main patterns SP 2 _M 1 . Thus, the input sensing unit ISU_M 1  may be improved in visibility. 
       FIG. 13A  is a perspective view illustrating a coupled state of the display apparatus according to an exemplary embodiment of the inventive concept.  FIG. 13B  is an exploded perspective view of the display apparatus of  FIG. 13A ;  FIGS. 14A to 14C  are plan views illustrating a portion of constituents of  FIG. 13B ;  FIG. 14A  illustrates a plan view of a display unit DPU_H,  FIG. 14B  illustrates a schematically enlarged view of an area XX′, and  FIG. 14C  illustrates a plan view of the input sensing unit ISU_H. Hereinafter, the inventive concept will be described with reference to  FIGS. 13A to 14C . The same reference numeral may be given to components that are the same as those of  FIGS. 1 to 12C , and their detailed descriptions will be omitted. 
     Referring to  FIG. 13A , the display apparatus DD may be a device that is activated according to an electrical signal. Examples of the display apparatus DD may include a tablet, a notebook, a computer, a smart television, and the like. In this exemplary embodiment, the display apparatus DD including a smart phone will be described as an example. 
     The display apparatus DD may display an image IM and sense an external input TC. The image IM includes a still image and a dynamic image. The external input TC includes various types of external inputs, such as a portion of user&#39;s body, light, heat, a pressure, or the like. In this embodiment, the user&#39;s input TC is illustrated as a user&#39;s hand applied to the front surface. 
     In this exemplary embodiment, the display apparatus DD provides a front surface FS on which an image is displayed, and the external input TC is sensed. However, this is merely an example. For example, as described above, the user&#39;s input TC may be provided in various shapes. The display apparatus DD may sense the user&#39;s input TC applied to a side surface or the rear surface of the display apparatus DD according to a structure of the display apparatus DD, but the inventive concept is not so limited. 
     As illustrated in  FIG. 13B , the display apparatus DD may include a window panel WP, an electronic panel EP, an electronic module EM, and an external case EDC. The window panel WP may include an insulation material. For example, the window panel WP may be made of glass, plastic, or a combination thereof. 
     The front surface FS of the display apparatus DD may correspond to a front surface of the window panel WP. The front surface FS of the window panel WP includes a transmission area TA and a bezel area BZA. The transmission area TA may be an optically transparent area. For example, the transmission area TA may be an area having a visible light transmittance of about 90% or more. The transmission area TA may correspond to the above-described transmission area WP-T (see  FIG. 2A ). 
     The bezel area BZA may be an area having a lower light transmittance than that of the transmission area TA. The bezel area BZA defines a shape of the transmission area TA. The bezel area BZA may be disposed adjacent to the transmission area TA to surround the transmission area TA. 
     The bezel area BZA may have a predetermined color. The bezel area BZA may cover the peripheral area NAA of the electronic panel  200  to prevent the peripheral area NAA from being visible from the outside. In this exemplary embodiment, the bezel area BZA may be defined by the above-described light blocking pattern WP-BZ (see  FIG. 2A ) and correspond to the peripheral area NAA. However, this is merely an example. For example, in the window panel WP, the bezel area BZA may be omitted. 
     A predetermined hole area HA may be defined in the window panel WP according to this exemplary embodiment. The hole area HA may be provided within the transmission area TA. The hole area MH overlaps the electronic module EM in a plan view. In this exemplary embodiment, the hole area HA may correspond to an area overlapping a module hole MH of an electronic panel EP_H, which will be described later, of the window panel WP. 
     The electronic module EM is disposed below the window panel WP. The electronic module EM may overlap the module hole MH in a plan view and also overlap the hole area HA. The electronic module EM may receive an external input transmitted through the hole area HA or provide an output through the hole area HA. At least a portion of the electronic module EM may be accommodated in the module hole MH. According to the inventive concept, the electronic module EM may be disposed to overlap the active area AA, thereby preventing the bezel area BZA from increasing. 
     The electronic module EM includes various functional modules for driving the display apparatus DD. The electronic module EM may be electrically connected to the electronic panel EP through a connector (not shown). For example, the electronic module EM may be a camera, a speaker, or a sensor that senses light or heat. 
     The electronic panel EP_H may display an image IM and sense an external input TC. In this exemplary embodiment, the predetermined module hole MH may be defined in the electronic panel EP_H. The module hole MH may be defined by passing through the electronic panel EP_H in the third direction DR 3 . 
     In this exemplary embodiment, the module hole MH may be defined within the active area AA. The module hole MH overlaps an electronic module EM that will be described later. The electronic module EM may receive external subject information provided to the outside of the window panel WP through the module hole MH. 
     Particularly, the electronic panel EP_H will be described with reference to  FIGS. 14A to 14C .  FIG. 14A  illustrates a plan view of a portion of the display unit DPU_H of the is electronic panel EP_H, and  FIG. 14B  illustrates a plan view of an input sensing unit ISU_H of the electronic panel EP_H.  FIG. 14B  schematically illustrates an area corresponding to an area XX′ of the display unit DPU_H. 
     As illustrated in  FIGS. 14A and 14B , the display unit DPU_H includes a plurality of pixels PX. The pixels PX may be disposed around the module hole MH to surround the module hole MH in a plan view. The pixels PX may be respectively connected to a power line PL, a data line DL, and a scan line GL, which are connected to a first power source terminal VDD. Display pads DPF may include pads D 1  connected to the data line DL and pads D 2  connected to the first power source terminal VDD.  FIG. 14A  illustrates a second power source terminal VSS connected to a light emitting element ELD. Hereinafter, duplicated detail description with respect to the pixels PX will be omitted. 
     The display unit DPU_H is penetrated by the module hole MH. In  FIG. 14B , two first and second signal lines SL 1  and SL 2  of the signal lines respectively connected to the pixels PX are illustrated. 
     The first signal line SL 1  extends in the first direction DR 1 . The first signal line SL 1  is connected to the pixels of the pixels PX in the same row arranged in the first direction DR 1 . The first signal line SL 1  may correspond to a scan line GL. The first signal line SL 1  may provide a gate signal for turning on the pixels PX to corresponding pixels. 
     A portion of the pixels PX connected to the first signal line SL 1  may be disposed at the left side of the module hole MH, and other portion of the pixels PX may be disposed at the right side of the module hole MH. Thus, the pixels in the same row connected to the first signal line SL 1  may be turned on/off by substantially the same gate signal even though a portion of the pixels with respect to the module hole MH is omitted. 
     The second signal line SL 2  extends in the second direction DR 2 . The second signal line SL 2  is connected to the pixels in the same column arranged in the second direction DR 2  of the pixels PX. The second signal line SL 2  may correspond to, for example, the data line DL. The second signal line SL 2  provides a data signal to the corresponding pixels PX. 
     A portion of the pixels PX connected to the second signal line SL 2  may be disposed above the module hole MH, and other portion of the pixels PX may be disposed below the module hole MH. Thus, the pixels in the same column connected to the second signal line SL 2  may receive a data signal through the same line even though a portion of the pixels with respect to the module hole MH is omitted. 
     In the display unit DPU_H according to an exemplary embodiment of the inventive concept, the first signal line SL 1  may correspond to the scan line, and the second signal line SL 2  may correspond to the data line. Alternatively, the first signal line SL 1  and the second signal line SL 2  may be one of a power line, an initial voltage line, and an emission control line. Also, although not shown, each of the pixels PX may be further connected to additional signal lines (not shown). 
     Referring to  FIG. 14C , the input sensing unit ISU_U is penetrated by the module hole MH. At least a portion of first electrodes TE 1 _U, second electrodes TE 2 _U, and third electrodes TE 3 _U disposed on a sensing area AA 2  may be disposed adjacent to an edge of the module hole MH to surround the module hole MH. The first electrodes TE 1 _U, the second electrodes TE 2 _U, and the third electrodes TE 3 _U, which are adjacent to the module hole MH, may include first main patterns SP 1 _H, second main patterns SP 2 _H, and third main patterns SP 3 _H, each of which has a partially-removed shape when compared to that of each of the patterns spaced apart from the module hole MH. 
     Referring again to  FIG. 13B , the external case EDC is disposed below the window panel WP. The external case EDC may be coupled to the window panel WP to define an outer appearance of the display apparatus DD_H. The external case EDC may include a material having relatively high rigidity. For example, the external case EDC may include a plurality of frames and/or plates, which are made of glass, plastic, and a metal. The external case EDC provides a predetermined accommodation space. The electronic panel EP_H and the electronic module EM may be accommodated in the accommodation space and thus be protected from an external impact. 
     According to the inventive concept, the electronic module EM may be disposed so that a portion of the electronic module overlaps the active area AA of the electronic panel EP_H and the transmission area TA of the window panel WP. Thus, the bezel area may be reduced in surface area to improve a sense of beauty of the display apparatus DD. 
       FIG. 15A  is an exploded perspective view of a display apparatus according to an exemplary embodiment of the inventive concept,  FIG. 15B  is a plan view illustrating a portion of constituents of  FIG. 15A . Hereinafter, the inventive concept will be described with reference to  FIGS. 15A and 15B . The same reference numeral may be given to components that are the same as those of  FIGS. 1 to 7B , and their detailed descriptions will be omitted. 
     A display apparatus DD_N may include a window panel WP_N, an electronic panel EP_N, an electronic module EM 1 , and an external case EDC. The window panel WP_N may further include a notch part NTA defined on one side thereof when compared to the window panel WP_H (see  FIG. 13B ) of  FIG. 13B . 
     The notch part NTA may be formed by recessing a portion of an extending side of the window panel WP_N toward a center of the window panel WP_N. Thus, a front surface FS of the window panel WP_N may include a transmission part TAN and a bezel area BZA_N, each of which has a shape deformed by the notch part NTA. Each of the transmission area TA_N and the bezel area BZA_N may have a shape having a recessed one side to correspond to the notch part NTA. 
     The notch part NTA may be defined in an area of the window panel WP_N overlapping the electronic module EM 1 . The electronic module EM 1  may be a camera, a speaker, or a sensor that senses light or heat. According to the inventive concept, the electronic module EM 1  may be exposed to the outside through the notch part NTA of the window panel WP_N. 
     The electronic panel EP_N is disposed between the window panel WP_N and the external case EDC. The notch part NT may be provided in the electronic panel EP_N to correspond to the window panel WP_N. The notch part NT of the electronic panel EP_N may be defined in a position overlapping the electronic module EM 1 . According to the inventive concept, the electronic module EM 1  may be exposed from the electronic panel EP_N and the window panel WP_N to easily provide an outputted signal to the outside or easily receive external information without interfering with the window panel WP_N or the electronic panel EP_N. 
     Referring to  FIG. 15B , an input sensing unit ISU_N may include a predetermined notch part NT. In this exemplary embodiment, the notch part NT may be defined by recessing a portion of an upper side of the display unit DPU_N, which extends in the first direction DR 1 , in an opposite direction of the second direction DR 2 . 
     As the notch part NT is defined, at least a portion of first electrode TE 1 _N, second electrode TE 2 _N, and third electrode TE 3 _N, which are disposed on a sensing area AA 2 , is may have a partially removed shape when compared to the input sensing unit ISU (see  FIG. 6B ) of  FIG. 6B . For example, a portion of the first electrodes TE 1 _N may have a surface area or length less than that of an area spaced apart from the notch part NT due to the notch part NT. The first electrode of the first electrodes TE 1 _N, which is spaced apart from the notch part NT in the second direction DR 2 , may have a length and surface area less than those of the first electrode spaced apart from the notch part NT in the first direction DR 1 . 
     Also, for example, a portion of the second electrodes TE 2 _N may be divided into left and right portions with respect to the notch part NT. The second connection pattern BP 2 _N connecting two second main patterns SP 2 _N of the second electrode TE 2 _N, which are spaced apart from each other with respect to the notch part NT, to each other may extend along an edge of the notch part NT. Thus, a portion of the second electrode TE 2 _N may be electrically connected through the second connection pattern BP 2 _N even though the second electrodes TE 2 _N are separated by the notch part NT. 
     Also, for example, a portion of the third electrodes TE 3 _N may be divided into left and right portions with respect to the notch part NT, like the second electrodes TE 2 _N. Thus, the third connection pattern BP 3 _N adjacent to the notch part NT may extend along an edge of the notch part NT to connect the two third main patterns SP 3 _N, which are spaced apart from each other with the notch part NT therebetween in the first direction DR 1 , to each other. Thus, a portion of the third electrode TE 3 _N may be electrically connected through the third connection pattern BP 3 _N even though the second electrodes TE 2 _N are separated by the notch part NT. 
     According to the inventive concept, the input sensing unit ISU_N having the various shapes and the display apparatus DD N including the input sensing unit ISU_N may be provided. Also, in the various shapes of the input sensing unit ISU_N, the third connection pattern BP 3 _M may be designed so that the third connection pattern BP 3 _M does not overlap the first connection patterns BP 1 _N. Therefore, the electronic device, in which the overlapping between the third connection patterns BP 3 _N and the first connection patterns BP 1 _N in a plan view is prevented to improve electrical reliability, may be provided. 
     According to the inventive concept, the overlapping between the signal lines that transmit the electrical signals different from each other may be reduced. Thus, the occurrence of noise due to the electrical interference between the signal lines may be reduced to improve the input sensing unit having the improved external input sensitivity. In addition, the display apparatus having the improved electrical reliability may be provided. 
     Although certain exemplary embodiments have been described herein, other embodiments and modifications will be apparent from this description. Accordingly, the inventive concepts are not limited to such embodiments, but rather to the broader scope of the appended claims and various obvious modifications and equivalent arrangements as would be apparent to a person of ordinary skill in the art.