Patent Publication Number: US-2023154452-A9

Title: Display device

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority from and the benefit of Korean Patent Application No. 10-2018-0079698, filed on Jul. 10, 2018, which is hereby incorporated by reference for all purposes as if fully set forth herein. 
     BACKGROUND 
     Field 
     Exemplary implementations of the invention relate generally to an electronic device and, more specifically, to a display device including a display panel and a flexible printed circuit. 
     Discussion of the Background 
     A display device such as an organic light emitting display (OLED), a liquid crystal display (LCD), etc. may include a display panel including pixels for displaying an image. A pad portion for input and output of signals may be disposed on the display panel to control driving of the display panel. A connecting member such as an integrated circuit (IC) chip, a flexible printed circuit (FPC), etc. may be attached to the pad portion. 
     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 
     Devices constructed according to exemplary implementations of the invention are capable of providing a display device having a reduced dead space. 
     According to one or more embodiments of the invention, a display device includes: a display panel having a first side and a second side facing the first side in a first direction, the display panel including a recessed portion having a recessed shape from the first side of the display panel toward the second side in the first direction, the recessed portion including at least one side; a pad portion disposed on a front surface of the display panel, the pad portion being adjacent to the at least one side of the recessed portion; and a flexible printed circuit (FPC) connected to the pad portion, the FPC being bent to a rear surface of the display panel around the at least one side of the recessed portion, the rear surface opposing the front surface. 
     The display device may further include a printed circuit board (PCB) on the rear surface of the display panel, the PCB being connected to the FPC. 
     The at least one side of the recessed portion may include a first side, a second side and a third side, the first side being parallel with the first side of the display panel, and the second side and the third side connecting the first side of the recessed portion to the first side of the display panel respectively and facing each other. The pad portion may be disposed adjacent to the first side of the recessed portion. 
     The display panel may include a non-display area adjacent to the first side of the display panel and the first, second, and third sides of the recessed portion; and a display area adjacent to the first side of the display panel and the first, second, and third sides of the recessed portion with the non-display area in between. A distance from the second side of the display panel to an end of the pad portion adjacent to the first side of the recessed portion may be smaller than a distance from the second side of the display panel to an end of the display area adjacent to the first side of the display panel. 
     The display device may further include a plurality of data lines disposed in the display area extending along the first direction; and a plurality of fan-out lines disposed in the non-display area extending along the non-display area, the plurality of fan-out lines is respectively connected to the plurality of data lines. 
     A width of the pad portion may be less than a width of the recessed portion corresponding to a distance between the second side and the third side of the recessed portion. 
     The FPC may be bent along a bending axis. A distance from the second side of the display panel to the bending axis of the FPC may be smaller than a distance from the second side of the display panel to the first side of the display panel. 
     A distance from the second side of the display panel to the bending axis of the FPC may be greater than a distance from the second side of the display panel to the first side of the recessed portion. 
     A width of the FPC may be less than a width of the recessed portion corresponding to a distance between the second side and the third side of the recessed portion. 
     The display device may further include at least one of a camera module, a sensor module, and a speaker module disposed in the recessed portion. 
     According to one or more embodiments of the invention, a display includes a display panel having a first side and a second side facing the first side in a first direction, the display panel comprising a recessed portion having a recessed shape from the first side of the display panel toward the second side in the first direction, the recessed portion including a first side parallel with the first side of the display panel, and a second side and a third side connecting the first side of the recessed portion to the first side of the display panel and opposite to each other; a first pad portion on a front surface of the display panel, the first pad portion being adjacent to the first side of the recessed portion; a first flexible printed circuit (FPC) connected to the first pad portion, the first FPC being bent to a rear surface of the display panel around the first side of the recessed portion; a second pad portion on the front surface of the display panel, the second pad portion being adjacent to the second side of the recessed portion; a second FPC connected to the second pad portion, the second FPC being bent to the rear surface of the display panel around the second side of the recessed portion; a third pad portion on the front surface of the display panel, the third pad portion being adjacent to the third side of the recessed portion; and a third FPC connected to the third pad portion, the third FPC being bent to the rear surface of the display panel around the third side of the recessed portion. 
     The display device may further include a printed circuit board (PCB) on the rear surface of the display panel, the PCB being connected to the first FPC, the second FPC, and the third FPC. 
     The display panel may include a non-display area adjacent to the first side of the display panel and the first, second, and third sides of the recessed portion; and a display area adjacent to the first side of the display panel and the first, second, and third sides of the recessed portion with the non-display area in between. The display device may further include a plurality of data lines disposed in the display area extended along the first direction. The plurality of data lines may include a first data line located at the first direction from the recessed portion in the display area, a second data line located at a second direction crossing the first direction from the recessed portion in the display area, and a third data line located at a third direction opposite to the second direction from the recessed portion in the display area. 
     The display device may further include a plurality of fan-out lines disposed in the non-display area, the plurality of fan-out lines respectively connected to the plurality of data lines. The plurality of fan-out lines may include a first fan-out line connecting the first pad portion to the first data line, a second fan-out line connecting the second pad portion to the second data line, and a third fan-out line connecting the third pad portion to the third data line. 
     The display device may further include a touch sensing unit disposed on the front surface of the display panel, the touch sensing unit being connected to the second pad portion and the third pad portion. 
     The display panel may include a first substrate, a display unit disposed on the first substrate, and a second substrate on the display unit. The touch sensing unit may be disposed on a front surface of the second substrate. 
     The first pad portion may be disposed on a front surface of the first substrate. The second pad portion and the third pad portion may be disposed on the front surface of the second substrate. 
     The display panel may include a flexible substrate, a display unit on the flexible substrate, and an encapsulation layer covering the display unit. The touch sensing unit may be disposed on a front surface of the encapsulation layer. 
     The first pad portion, the second pad portion, and the third pad portion may be disposed on a front surface of the flexible substrate. 
     The touch sensing unit may include a plurality of first sensing electrodes extended along the first direction and a plurality of second sensing electrodes extended along a second direction crossing the first direction. The second pad portion may be connected to the plurality of first sensing electrodes. The third pad portion may be connected to the plurality of second sensing electrodes. 
     The display device according to the exemplary embodiments may include the recessed portion formed at the first side of the display panel, the pad portion located on the front surface of the display panel adjacent to the side of the recessed portion, and the FPC connected to the pad portion and bent to the rear surface of the display panel around the side of the recessed portion. Accordingly, the display device according to the exemplary embodiment may have reduced dead space of the display device. 
     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 plan view illustrating a display device according to an exemplary embodiment. 
         FIG.  2    is a front view illustrating a display device according to an exemplary embodiment. 
         FIG.  3    is a rear view illustrating the display device in  FIG.  2   . 
         FIG.  4    is a cross-sectional view illustrating the display device in  FIG.  3    taken along a sectional line I-I′. 
         FIG.  5    is a front view illustrating a display device according to an exemplary embodiment. 
         FIG.  6    is a rear view illustrating the display device in  FIG.  5   . 
         FIG.  7    is a front view illustrating a display device according to an exemplary embodiment. 
         FIGS.  8 A and  8 B  are front views illustrating a touch sensing unit of the display device in  FIG.  7   . 
         FIG.  9    is a rear view illustrating the display device in  FIG.  7   . 
         FIG.  10 A  is a cross-sectional view illustrating the display device in  FIG.  9    taken along a sectional line and  FIG.  10 B  is a cross-sectional view illustrating the display device in  FIG.  9    taken along a sectional line 
         FIG.  11    is a front view illustrating a display device according to an exemplary embodiment. 
         FIG.  12    is a rear view illustrating the display device in  FIG.  11   . 
         FIG.  13 A  is a cross-sectional view illustrating the display device in  FIG.  12    taken along a sectional line IV-IV′, and  FIG.  13 B  is a cross-sectional view illustrating the display device in  FIG.  12    taken along a sectional line V-V′. 
     
    
    
     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 or implementations of the invention. As used herein “embodiments” and “implementations” are interchangeable words that 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 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 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, DR 1  direction, DR 2  direction, and DR 3  direction are not limited to a rectangular coordinate system, such as the x, y, and z—axes, and may be interpreted in a broader sense. For example, the DR 1  direction, the DR 2  direction, and the DR 3  direction may be may represent different directions that are not perpendicular to one another. For the purposes of this disclosure, “at least one of X, Y, and Z” and “at least one selected from the group consisting of X, Y, and Z” may be construed as X only, Y only, Z only, or any combination of two or more of X, Y, and Z, such as, for instance, XYZ, XYY, YZ, and ZZ. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. 
     Although the terms “first,” “second,” 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 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. 
     Hereinafter, a display device according to an exemplary embodiment will be described with reference to  FIGS.  1 ,  2 ,  3 , and  4   . 
       FIG.  1    is a plan view illustrating a display device according to an exemplary embodiment.  FIG.  2    is a front view illustrating a display device according to an exemplary embodiment.  FIG.  3    is a rear view illustrating the display device in  FIG.  2   .  FIG.  4    is a cross-sectional view illustrating the display device in  FIG.  3    taken along a sectional line I-I′. 
     Referring to  FIGS.  1 ,  2 ,  3 , and  4   , a display device according to an exemplary embodiment may include a display panel  110 , a pad portion  130 , a flexible printed circuit (FPC)  140 , and a printed circuit board (PCB)  150 . A recessed portion  120  may be formed at one side of the display panel  110 . 
     The display panel  110  may display an image. The display panel  110  may be any one of an organic light emitting display panel and a liquid crystal display panel. 
     The display panel  110  may have a substantially quadrangular shape in a plan view. However, a planar shape of the display panel  110  is not limited thereto, and the display panel  110  may have a circular shape, a polygonal shape, etc. the display panel  110  may have a first side  110   a  and a second side  110   b . The second side  110   b  may be opposite to the first side  110   a , and may be located in a first direction DR 1  from the first side  110   a . Here, the first side  110   a  and the second side  110   b  may be an upper side and a lower side of the display panel  110 , respectively. 
     The recessed portion  120  having a recessed shape toward the first direction DR 1  from the first side  110   a  may be formed at the first side  110   a  of the display panel  110 . The recessed portion  120  may include a side extended from the first side  110   a  of the display panel  110 . In an exemplary embodiment, the recessed portion  120  may include a first side  121  parallel with the first side  110   a  of the display panel  110 , and a second side  122  and a third side  123  connecting the first side  121  to the first side  110   a  of the display panel  110 . The second side  122  may be extended from an end of the first side  121 , and the third side  123  may be extended from another end of the first side  121 . The second side  122  and the third side  123  may be opposite to each other. 
     Some elements included in the display device may be disposed in the recessed portion  120 . In an exemplary embodiment, at least one of a camera module  170 , a sensor module  180 , and a speaker module  190  may be disposed in the recessed portion  120 . In this case, the camera module  170 , the sensor module  180 , and the speaker module  190  may not overlap the FPC  140  in a plan view, which will be described below. 
     The display panel  110  may include a display area DA displaying an image and a non-display area NDA adjacent to the display area DA. The non-display area NDA may be located between the display area DA and sides of the display panel  110 . For example, the display area DA may be located adjacent to the first side  121 , the second side  122 , and the third side  123  of the recessed portion  120  with the non-display area NDA in between, and the non-display area NDA may be located between the display area DA and the first side  110   a  of the display panel  110  and between the display area DA and the first side  121 , the second side  122 , and the third side  123  of the recessed portion  120 . 
     A plurality of pixels PX may be disposed in the display area DA of the display panel  110 . The plurality of pixels PX may be arranged in the display area DA as a substantial matrix form. The display panel  110  may display an image that is a combination of light emitted from each of the plurality of pixels PX. 
     A plurality of data lines DW may be disposed in the display area DA. The data lines DW may extend along the first direction DR 1 , and may be spaced apart from each other in a second direction DR 2  crossing the first direction DR 1 . The data lines DW may supply data voltage for emitting light to the plurality of pixels PX. 
     The display panel  110  may include a first substrate  111 , a display unit  112 , and a second substrate  113 . For example, the first substrate  111  may be a transparent insulating substrate including glass or plastic. 
     The display unit  112  may be disposed on the first substrate  111 . The display unit  112  may include the plurality of pixels PX, and may be located in the display area DA. For example, when the display panel  110  is an organic light emitting display panel, each of the plurality of pixels PX included in the display unit  112  may include at least one thin film transistor, an anode electrode connected thereto, a cathode electrode opposite to the anode electrode, and an organic light emitting layer between the anode electrode and the cathode electrode. Further, when the display panel  110  is a liquid crystal display panel, each of the plurality of pixels PX included in the display unit  112  may include at least one thin film transistor, a pixel electrode connected thereto, a common electrode opposite to the pixel electrode, a liquid crystal layer between the pixel electrode and the common electrode, and a color filter. 
     The second substrate  113  may be disposed on the display unit  112 . The second substrate  113  may be opposite to the first substrate  111  with the display unit  112  in between. For example, the second substrate  113  may be a transparent insulating substrate including glass or plastic. 
     A sealing unit  114  may be disposed between the first substrate  111  and the second substrate  113  to attach the second substrate  113  to the first substrate  111 . The sealing unit  114  may be disposed in the non-display area NDA of the display panel  110  to encapsulate the display unit  112 . The sealing unit  114  may include inorganic material such as frit or organic material. 
     The pad portion  130  may be disposed on a front surface of the display panel  110  in the non-display area NDA. For example, the pad portion  130  may be located on a front surface of the first substrate  111 . The pad portion  130  may be located adjacent to the side of the recessed portion  120 . In an exemplary embodiment, the pad portion  130  may be located adjacent to the first side  121  of the recessed portion  120 . 
     The pad portion  130  may include a plurality of pads PD. The pads PD may be arranged along the second direction DR 2 . The data voltage may be transmitted from the FPC  140  to each of the pads PD. 
     A distance D 1  from the second side  110   b  of the display panel  110  to an end of the pad portion  130  adjacent to the first side  121  of the recessed portion  120  may be less than a distance D 2  from the second side  110   b  of the display panel  110  to an end of the display area DA adjacent to the first side  110   a  of the display panel  110 . In other words, the pad portion  130  may be located inside the display panel  110  rather than the end of the display area DA adjacent to the first side  110   a  of the display panel  110 . 
     A width W 1  of the pad portion  130  may be less than a width W 2  of the recessed portion  120 . For example, the width W 2  of the recessed portion  120  may correspond to a distance between the second side  122  and the third side  123  of the recessed portion  120 . Accordingly, the pad portion  130  may not be adjacent to the second side  122  or the third side  123  of the recessed portion  120 . 
     The pads PD may be connected to the data lines DW through a plurality of fan-out lines FW. The fan-out lines FW may be disposed in the non-display area NDA. The fan-out lines FW may connect the pads PD and data lines DW, and may transmit the data voltage from the pads PD to the data lines DW. First set of the fan-out lines FW connected to the pads PD located at a center of the pad portion  130  may be extended to the first direction DR 1  from the pad portion  130 , and second set of the fan-out lines FW connected to the pads PD located on the second direction DR 2  of the pad portion  130  may be extended to the second direction DR 2  from the pad portion  130 . Further, third set of the fan-out lines FW connected to the pads PD located on a third direction DR 3  opposite to the second direction DR 2  of the pad portion  130  may be extended to the third direction DR 3  from the pad portion  130 . 
     The FPC  140  connected to the pad portion  130  may be disposed on a front surface of the pad portion  130 . The FPC  140  may electrically connect the pad portion  130  and the PCB  150 . The FPC  140  may transmit the data voltage from the PCB  150  to the pad portion  130 . The FPC  140  may be a display FPC for displaying an image of the display panel  110 . 
     The FPC  140  may be bent to a rear surface of the display panel  110  around the side of the recessed portion  120 . In other words, a first end of the FPC  140  may be located on the front surface of the display panel  110 , and a second end of the FPC  140  may be located on the rear surface of the display panel  110 . In an exemplary embodiment, the FPC  140  may be bent along a bending axis BX inside the FPC  140  with being bent around the first side  121  of the recessed portion  120 . Here, the bending axis BX of the FPC  140  may be located inside the recessed portion  120 . 
     A distance D 3  from the second side  110   b  of the display panel  110  to the bending axis BX of the FPC  140  may be less than a distance D 4  from the second side  110   b  of the display panel  110  to the first side  110   a  of the display panel  110 . In other words, the bending axis BX of the FPC  140  may be located inside the display panel  110  rather than the first side  110   a  of the display panel  110 . 
     The distance D 3  from the second side  110   b  of the display panel  110  to the bending axis BX of the FPC  140  may be greater than a distance D 5  from the second side  110   b  of the display panel  110  to the first side  121  of the recessed portion  120 . In other words, the bending axis BX of the FPC  140  may be located inside the recessed portion  120 , and the FPC  140  may partially overlap the recessed portion  120  in a plan view. 
     A width W 3  of the FPC  140  may be less than the width W 2  of the recessed portion  120 . Accordingly, the FPC  140  may not be adjacent to the second side  122  or the third side  123  of the recessed portion  120 . 
     In a display device according to the conventional technology, a pad portion may be located in a non-display area adjacent to a lower side of a display panel, and a FPC may be bent around the lower side of the display panel. Therefore, a dead space of the display device may increase by a length of the FPC in a plan view. However, in the display device according to the exemplary embodiment, the pad portion  130  may be located in the non-display area NDA adjacent to the upper side  110   a  of the display panel  110  at which the recessed portion  120  is formed, and the FPC  140  may be bent around the side of the recessed portion  120  of the display panel  110 . Therefore, a dead space of the display device may decrease. 
     The PCB  150  connected to the FPC  140  may be located on the rear surface of the display panel  110 . For example, the PCB  150  may be disposed on a rear surface of the first substrate  111 . The PCB  150  may be electrically connected to the display panel  110  through the FPC  140 . 
     Hereinafter, a display device according to an exemplary embodiment will be described with reference to  FIGS.  5  and  6   . 
       FIG.  5    is a front view illustrating a display device according to an exemplary embodiment.  FIG.  6    is a rear view illustrating the display device in  FIG.  5   . 
     Referring to  FIGS.  5  and  6   , a display device according to an exemplary embodiment may include a display panel  210 , a first pad portion  231 , a second pad portion  232 , a third pad portion  233 , a first flexible printed circuit (FPC)  241 , a second FPC  242 , a third FPC  243 , and a printed circuit board (PCB)  250 . A recessed portion  220  may be formed at one side of the display panel  210 . Detailed descriptions on elements of the display device according to an exemplary embodiment with reference to  FIGS.  5  and  6   , which are substantially the same as or similar to those of the display device according to the exemplary embodiment with reference to  FIGS.  1 ,  2 ,  3 , and  4   , will not be repeated. 
     A plurality of data lines DW 1 , DW 2 , and DW 3  may be disposed in the display area DA. The data lines DW 1 , DW 2 , and DW 3  may include first data lines DW 1  located on the first direction DR 1  from the recessed portion  220  in the display area DA, second data lines DW 2  located on the second direction DR 2  from the recessed portion  220  in the display area DA, and third data lines DW 3  located on the third direction DR 3  from the recessed portion  220  in the display area DA. The data lines DW 1 , DW 2 , and DW 3  may extend along the first direction DR 1 , and may be spaced apart from each other in the second direction DR 2 . The data lines DW 1 , DW 2 , and DW 3  may supply data voltage for emitting light to the plurality of pixels PX. 
     The first pad portion  231 , the second pad portion  232 , and the third pad portion  233  may be disposed on a front surface of the display panel  210  in the non-display area NDA. For example, the first pad portion  231 , the second pad portion  232 , and the third pad portion  233  may be located on a front surface of the first substrate  211 . The first pad portion  231 , the second pad portion  232 , and the third pad portion  233  may be located adjacent to the side of the recessed portion  220 . In an exemplary embodiment, the first pad portion  231 , the second pad portion  232 , and the third pad portion  233  may be located adjacent to the first side  221 , the second side  222 , and the third side  223  of the recessed portion  220 , respectively. For example, the first pad portion  231  of the display device in  FIG.  5    may be substantially the same as the pad portion  130  of the display device in  FIG.  2   . 
     The first pad portion  231  may include a plurality of first pads PD 1 , the second pad portion  232  may include a plurality of second pads PD 2 , and the third pad portion  233  may include a plurality of third pads PD 3 . The first pads PD 1  may be arranged along the second direction DR 2 , and the second pads PD 2  and the third pads PD 3  may be arranged along the first direction DR 1 . The data voltage may be transmitted from the first FPC  241  to each of the first pads PD 1 , the data voltage may be transmitted from the second FPC  242  to each of the second pads PD 2 , and the data voltage may be transmitted from the third FPC  243  to each of the third pads PD 3 . 
     The first pads PD 1  may be connected to the first data lines DW 1  through a plurality of first fan-out lines FW 1 , and the first fan-out lines FW 1  may be disposed in the non-display area NDA. The first fan-out lines FW 1  may connect the first pads PD 1  and the first data lines DW 1 , and may transmit the data voltage from the first pads PD 1  to the first data lines DW 1 . First set of the first fan-out lines FW 1  connected to the first pads PD 1  located at a center of the first pad portion  231  may be extended to the first direction DR 1  from the first pad portion  231 , and second set of the first fan-out lines FW 1  connected to the first pads PD 1  located on the second direction DR 2  or the third direction DR 3  of the first pad portion  231  may be extended to the second direction DR 2  or the third direction DR 3  from the first pad portion  231 . 
     The second pads PD 2  may be connected to the second data lines DW 2  through a plurality of second fan-out lines FW 2 , and the third pads PD 3  may be connected to the third data lines DW 3  through a plurality of third fan-out lines FW 3 . The second and third fan-out lines FW 2  and FW 3  may be disposed in the non-display area NDA. The second fan-out lines FW 2  may connect the second pads PD 2  and the second data lines DW 2 , and may transmit the data voltage from the second pads PD 2  to the second data lines DW 2 . Further, the third fan-out lines FW 3  may connect the third pads PD 3  and the third data lines DW 3 , and may transmit the data voltage from the third pads PD 3  to the third data lines DW 3 . The second fan-out lines FW 2  connected to the second pads PD 2  may be extended to the second direction DR 2  from the second pad portion  232 , and the third fan-out lines FW 3  connected to the third pads PD 3  may be extended to the third direction DR 3  from the third pad portion  233 . 
     The first FPC  241  connected to the first pad portion  231  may be disposed on a front surface of the first pad portion  231 . The first FPC  241  may electrically connect the first pad portion  231  and the PCB  250 . The first FPC  241  may be bent to a rear surface of the display panel  210  around the side of the recessed portion  220 . The first FPC  241  may be bent along a bending axis inside the first FPC  241  with being bent around the first side  221  of the recessed portion  220 . For example, the first FPC  241  of the display device in  FIG.  5    may be substantially the same as the FPC  140  of the display device in  FIG.  2   . 
     The second FPC  242  connected to the second pad portion  232  may be disposed on a front surface of the second pad portion  232 , and the third FPC  243  connected to the third pad portion  233  may be disposed on a front surface of the third pad portion  233 . The second FPC  242  may electrically connect the second pad portion  232  and the PCB  250 , and the third FPC  243  may electrically connect the third pad portion  233  and the PCB  250 . The second FPC  242  may transmit the data voltage from the PCB  250  to the second pad portion  232 , and the third FPC  243  may transmit the data voltage from the PCB  250  to the third pad portion  233 . The first FPC  241 , is the second FPC  242 , and the third FPC  243  may be display FPCs for displaying an image of the display panel  210 . 
     The second FPC  242  and the third FPC  243  may be bent to a rear surface of the display panel  210  around the side of the recessed portion  220 . In other words, a first end of the second FPC  242  and a first end of the third FPC  243  may be located on the front surface of the display panel  210 , and a second end of the second FPC  242  and a second end of the third FPC  243  may be located on the rear surface of the display panel  210 . The second FPC  242  may be bent along a bending axis inside the second FPC  242  with being bent around the second side  222  of the recessed portion  220 . The third FPC  243  may be bent along a bending axis inside the third FPC  243  with being bent around the third side  223  of the recessed portion  220 . 
     When a width of the recessed portion  220  corresponding to a distance between the second side  222  and the third side  223  of the recessed portion  220  is relatively small, a space for arranging a sufficient number of the first pads PD 1  in the first pad portion  231  located adjacent to the first side  221  of the recessed portion  220  may be insufficient. However, the display device according to the exemplary embodiment may include the second pad portion  232  and the third pad portion  233  located adjacent to the second side  222  and the third side  223  of the recessed portion  220 , respectively, and the second FPC  242  and the third FPC  243  may be connected to the second pad portion  232  and the third pad portion  233 , respectively. Therefore, a sufficient number of the pads PD 1 , PD 2 , and PD 3  may be disposed in the pad portions  231 ,  232 , and  233 . 
     Hereinafter, a display device according to an exemplary embodiment will be described with reference to  FIGS.  7 ,  8 A,  8 B,  9 ,  10 A, and  10 B . 
       FIG.  7    is a front view illustrating a display device according to an exemplary embodiment.  FIGS.  8 A and  8 B  are front views illustrating a touch sensing unit of the display is device in  FIG.  7   .  FIG.  9    is a rear view illustrating the display device in  FIG.  7   .  FIG.  10 A  is a cross-sectional view illustrating the display device in  FIG.  9    taken along a sectional line and  FIG.  10 B  is a cross-sectional view illustrating the display device in  FIG.  9    taken along a sectional line 
     Referring to  FIGS.  7 ,  8 A,  8 B,  9 ,  10 A, and  10 B , a display device according to an exemplary embodiment may include a display panel  310 , a first pad portion  331 , a second pad portion  332 , a third pad portion  333 , a first flexible printed circuit (FPC)  341 , a second FPC  342 , a third FPC  343 , a printed circuit board (PCB)  350 , and a touch sensing unit  360 . A recessed portion  320  may be formed at one side of the display panel  310 . Detailed descriptions on elements of the display device according to an exemplary embodiment with reference to  FIGS.  7 ,  8 A,  8 B,  9 ,  10 A, and  10 B , which are substantially the same as or similar to those of the display device according to the exemplary embodiment with reference to  FIGS.  1 ,  2 ,  3 , and  4    and to those of the display device according to the exemplary embodiment with reference to  FIGS.  5  and  6   , will not be repeated. 
     The touch sensing unit  360  may be disposed on a front surface of the display panel  310 . For example, the touch sensing unit  360  may be disposed on a front surface of the second substrate  313  of the display panel  310 . The touch sensing unit  360  may detect a touch of a user. The touch sensing unit  360  may be a capacitive touch sensing unit. The touch sensing unit  360  may be connected to the second pad portion  332  and the third pad portion  333 . 
     The touch sensing unit  360  may include a plurality of first sensing electrodes  361  and a plurality of second sensing electrodes  362 . The first sensing electrodes  361  may extend along the first direction DR 1 , and may be spaced apart from each other in the second direction DR 2 . The second sensing electrodes  362  may extend along the second direction DR 2 , and may is be spaced apart from each other in the first direction DR 1 . In an exemplary embodiment, the first sensing electrodes  361  may receive driving signals, and the second sensing electrodes  362  may output sensing signals. For example, when the sensing signals corresponding to changes of capacitances are outputted from the second sensing electrodes  362  during the driving signals are applied to the first sensing electrodes  361 , the touch sensing unit  360  may determine a location on which a touch of the user is inputted. 
     The first pad portion  331 , the second pad portion  332 , and the third pad portion  333  may be disposed on a front surface of the display panel  310  in the non-display area NDA. For example, the first pad portion  331  may be located on a front surface of the first substrate  311 , and the second pad portion  332  and the third pad portion  333  may be located on a front surface of the second substrate  313 . The first pad portion  331 , the second pad portion  332 , and the third pad portion  333  may be located adjacent to the side of the recessed portion  320 . In an exemplary embodiment, the first pad portion  331 , the second pad portion  332 , and the third pad portion  333  may be located adjacent to the first side  321 , the second side  322 , and the third side  323  of the recessed portion  320 , respectively. 
     The first pad portion  331  may include a plurality of first pads PD 1 , the second pad portion  332  may include a plurality of second pads PD 2 , and the third pad portion  333  may include a plurality of third pads PD 3 . The data voltage may be transmitted from the first FPC  341  to each of the first pads PD 1 . The driving signals may be transmitted from the second FPC  342  to each of the second pads PD 2 , or each of the second pads PD 2  may transmit the sensing signals to the second FPC  342 . The driving signals may be transmitted from the third FPC  343  to each of the third pads PD 3 , or each of the third pads PD 3  may transmit the sensing signals to the third FPC  343 . 
     The second pads PD 2  may be connected to a plurality of first connection lines CW 1 , and the third pads PD 3  may be connected to a plurality of second connection lines CW 2 . The first and second connection lines CW 1  and CW 2  may be disposed on the front surface of the second substrate  313  in the non-display area NDA. 
     Referring to  FIG.  8 A , the first connection lines CW 1  may be connected to the first sensing electrodes  361 , and the second connection lines CW 2  may be connected to the second sensing electrodes  362 . The first connection lines CW 1  may connect the second pads PD 2  and the first sensing electrodes  361 , and may transmit the driving signals from the second pads PD 2  to the first sensing electrodes  361 . Further, the second connection lines CW 2  may connect the third pads PD 3  and the second sensing electrodes  362 , and may transmit the sensing signals from the second sensing electrodes  362  to the third pads PD 3 . 
     Referring to  FIG.  8 B , in another exemplary embodiment, the first connection lines CW 1  may be connected to first set of the first sensing electrodes  361  and first set of the second sensing electrodes  362 , and the second connection lines CW 2  may be connected to second set of the first sensing electrodes  361  and second set of the second sensing electrodes  362 . For example, first set of the first connection lines CW 1  may connect first set of the second pads PD 2  and the first sensing electrodes  361  located in the second direction DR 2  from the recessed portion  320 , and may transmit the driving signals from the first set of the second pads PD 2  to the first sensing electrodes  361  located in the second direction DR 2  from the recessed portion  320 . Second set of the first connection lines CW 1  may connect second set of the second pads PD 2  and the first set of the second sensing electrodes  362 , and may transmit the sensing signals from the first set of second sensing electrodes  362  to the second set of the second pads PD 2 . 
     Further, first set of the second connection lines CW 2  may connect first set of the is third pads PD 3  and the first sensing electrodes  361  located in the third direction DR 3  from the recessed portion  320 , and may transmit the driving signals from the first set of the third pads PD 3  to the first sensing electrodes  361  located in the third direction DR 3  from the recessed portion  320 . Second set of the second connection lines CW 2  may connect second set of the third pads PD 3  and the second set of the second sensing electrodes  362 , and may transmit the sensing signals from the second set of second sensing electrodes  362  to the second set of the third pads PD 3 . For example, the first set of the second sensing electrodes  362  connected to the second set of the first connection lines CW 1  and the second set of the second sensing electrodes  362  connected to the second set of the second connection lines CW 2  may be alternately disposed along the first direction DR 1 . 
     The second FPC  342  connected to the second pad portion  332  may be disposed on a front surface of the second pad portion  332 , and the third FPC  343  connected to the third pad portion  333  may be disposed on a front surface of the third pad portion  333 . The second FPC  342  may electrically connect the second pad portion  332  and the PCB  350 , and the third FPC  343  may electrically connect the third pad portion  333  and the PCB  350 . The second FPC  342  may transmit the driving signals from the PCB  350  to the second pad portion  332 , or may transmit the sensing signals from the second pad portion  332  to the PCB  350 . The third FPC  343  may transmit the driving signals from the PCB  350  to the third pad portion  333 , or may transmit the sensing signals from the third pad portion  333  to the PCB  350 . The first FPC  341  may be a display FPC for displaying an image of the display panel  310 , and the second FPC  342  and the third FPC  343  may be touch FPCs for sensing a touch of the touch sensing unit  360 . 
     The second FPC  342  and the third FPC  343  may be bent to a rear surface of the display panel  310  around the side of the recessed portion  320 . In other words, a first end of the second FPC  342  and a first end of the third FPC  343  may be located on the front surface of the display panel  310 , and a second end of the second FPC  342  and a second end of the third FPC  343  may be located on the rear surface of the display panel  310 . Specifically, the first end of the second FPC  342  and the first end of the third FPC  343  may be located on a front surface of the second substrate  313  of the display panel  310 . The second FPC  342  may be bent along a bending axis BX 2  inside the second FPC  342  with being bent around the second side  322  of the recessed portion  320 . The third FPC  343  may be bent along a bending axis inside the third FPC  343  with being bent around the third side  323  of the recessed portion  320 . 
     Hereinafter, a display device according to an exemplary embodiment will be described with reference to  FIGS.  11 ,  12 ,  13 A, and  13 B . 
       FIG.  11    is a front view illustrating a display device according to an exemplary embodiment.  FIG.  12    is a rear view illustrating the display device in  FIG.  11   .  FIG.  13 A  is a cross-sectional view illustrating the display device in  FIG.  12    taken along a sectional line IV-IV′, and  FIG.  13 B  is a cross-sectional view illustrating the display device in  FIG.  12    taken along a sectional line V-V′. 
     Referring to  FIGS.  11 ,  12 ,  13 A, and  13 B , a display device according to an exemplary embodiment may include a display panel  410 , a first pad portion  431 , a second pad portion  432 , a third pad portion  433 , a first flexible printed circuit (FPC)  441 , a second FPC  442 , a third FPC  443 , a printed circuit board (PCB)  450 , and a touch sensing unit  460 . A recessed portion  420  may be formed at one side of the display panel  410 . Detailed descriptions on elements of the display device according to an exemplary embodiment with reference to  FIGS.  11 ,  12 ,  13 A, and  13 B , which are substantially the same as or similar to those of the display device according to the exemplary embodiment with reference to  FIGS.  7 ,  8 A,  8 B,  9 ,  10 A, and  10 B , is will not be repeated. 
     The display panel  410  may include a flexible substrate  411 , a display unit  412 , and an encapsulation layer  413 . The flexible substrate  411  may include flexible material such as polyimide (PI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyarylate (PAR), polycarbonate (PC), polyetherimide (PEI), polyethersulfone (PS), etc. The display unit  412  may be disposed on the flexible substrate  411 . 
     The encapsulation layer  413  may be disposed on the display unit  412 . The encapsulation layer  413  may be located on the flexible substrate  411  with covering the display unit  412 . For example, the encapsulation layer  413  may cover an upper portion and a side portion of the display unit  412 . In an exemplary embodiment, the encapsulation layer  413  may include at least one inorganic layer and at least one organic layer which are alternately stacked. 
     The touch sensing unit  460  may be disposed on a front surface of the display panel  410 . For example, the touch sensing unit  460  may be disposed on a front surface of the encapsulation layer  413  of the display panel  410 . 
     The first pad portion  431 , the second pad portion  432 , and the third pad portion  433  may be disposed on the front surface of the display panel  410  in the non-display area NDA. For example, the first pad portion  431 , the second pad portion  432 , and the third pad portion  433  may be located on a front surface of the flexible substrate  411 . The first pad portion  431 , the second pad portion  432 , and the third pad portion  433  may be located adjacent to the side of the recessed portion  420 . In an exemplary embodiment, the first pad portion  431 , the second pad portion  432 , and the third pad portion  433  may be located adjacent to the first side  421 , the second side  422 , and the third side  423  of the recessed portion  420 , respectively. 
     The first pad portion  431  may include a plurality of first pads PD 1 , the second pad is portion  432  may include a plurality of second pads PD 2 , and the third pad portion  433  may include a plurality of third pads PD 3 . The data voltage may be transmitted from the first FPC  441  to each of the first pads PD 1 . The driving signals may be transmitted from the second FPC  442  to each of the second pads PD 2 , or each of the second pads PD 2  may transmit the sensing signals to the second FPC  442 . The driving signals may be transmitted from the third FPC  443  to each of the third pads PD 3 , or each of the third pads PD 3  may transmit the sensing signals to the third FPC  443 . 
     The second pads PD 2  and the third pads PD 3  may be connected to a plurality of connection lines CW. The connection lines CW may be disposed on the front surface of the display panel  410  in the non-display area NDA. In an exemplary embodiment, the connection lines CW may extend from the front surface of the flexible substrate  411  to the front surface of the encapsulation layer  413  along a side of the encapsulation layer  413 . Accordingly, the connection lines CW may connect the second pads PD 2  and the third pads PD 3  disposed on the front surface of the flexible substrate  411  to the touch sensing unit  460  disposed on the front surface of the encapsulation layer  413 . 
     The second FPC  442  and the third FPC  443  may be bent to a rear surface of the display panel  410  around the side of the recessed portion  420 . In other words, a first end of the second FPC  442  and a first end of the third FPC  443  may be located on the front surface of the display panel  410 , and a second end of the second FPC  442  and a second end of the third FPC  443  may be located on the rear surface of the display panel  410 . Specifically, the first end of the second FPC  442  and the first end of the third FPC  443  may be located on the front surface of the flexible substrate  411  of the display panel  410 . The second FPC  442  may be bent along a bending axis BX 2  inside the second FPC  442  with being bent around the second side  422  of the is recessed portion  420 . The third FPC  443  may be bent along a bending axis inside the third FPC  443  with being bent around the third side  423  of the recessed portion  420 . 
     The display device according to the exemplary embodiments of may be applied to a display device included in a computer, a notebook, a mobile phone, a smartphone, a smart pad, a PMP, a PDA, an MP3 player, or the like. 
     Although certain exemplary embodiments and implementations 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.