Patent Publication Number: US-11656730-B2

Title: Display device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. application Ser. No. 16/482,238, filed Jul. 30, 2019, which in turn is a National Stage Entry of International Application No. PCT/KR2019/001248, filed Jan. 30, 2019, and which claims priority from and the benefit of Korean Patent Application No. 10-2018-0094503, filed on Aug. 13, 2018, each of which is incorporated by reference for all purposes as if fully set forth herein. 
    
    
     BACKGROUND 
     Field 
     Exemplary embodiments/implementations of the invention relates to a display device including an input sensing unit. 
     Discussion of the Background 
     Various display devices used in multimedia devices such as televisions, mobile phones, tablet computers, navigation systems and game machines are being developed. The display devices include a keyboard or a mouse as an input device. In addition, the display devices include a touch panel as an input device. 
     The display devices may further include a camera device, a fingerprint recognition sensor, etc. The above sensors are generally disposed on a side of a display device, thereby increasing a dead space. However, recently, a notch design is applied to a display device, and a camera device, etc. are disposed in a notch area to maximize a display area of the display 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 
     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. 
     Devices constructed according to exemplary implementations/embodiments of the invention are capable of displaying an image on the entire front surface and sensing an input by including a hole, in which a sensor such as a camera device is disposed, in a display area. 
     However, aspects of the present disclosure are not restricted to the one set forth herein. The above and other aspects of the present disclosure will become more apparent to one of ordinary skill in the art to which the present disclosure pertains by referencing the detailed description of the present disclosure given below. 
     According to one or more embodiments of the invention, a display device comprising: a display unit which comprises a display area and a first hole formed in the display area; and an input sensing unit which is disposed on the display unit and comprises a second hole corresponding to the first hole, wherein the input sensing unit further comprises: a base layer which comprises an adjacent area located adjacent to the second hole and a sensing area overlapping the display area and surrounding the adjacent area; detection electrodes which are disposed on the sensing area; and a first connection wiring which is disposed on the adjacent area and electrically connects detection electrodes spaced apart by the second hole among the detection electrodes. 
     In an exemplary embodiment, wherein the detection electrodes comprise sensing electrodes arranged in a first direction and connected to each other and driving electrodes arranged in a second direction perpendicular to the first direction and connected to each other, wherein a first driving electrode and a second driving electrode spaced apart from each other by the second hole among the driving electrodes are electrically connected by the first connection wiring. 
     In an exemplary embodiment, electrically connect the sensing electrodes to each other, wherein a first sensing electrode and a second sensing electrode disposed adjacent to the second hole among the sensing electrodes are electrically connected to each other by a first adjacent connection part among the first connection parts, and the first adjacent connection part is located on a first reference boundary line spaced apart from the second hole by a reference distance. 
     In an exemplary embodiment, wherein the first connection parts are located on one imaginary line, and the first adjacent connection part is located at an intersection point of the imaginary line and the first reference boundary line. 
     In an exemplary embodiment, wherein the input sensing unit further comprises: pads which are disposed on a non-sensing area of the base layer along edges of the sensing area; and sensing lines which are electrically connected to the pads and are disposed on the non-sensing area, wherein the first sensing electrode and the second sensing electrode are electrically connected to two of the pads by two of the sensing lines. 
     In an exemplary embodiment, wherein a sensing electrode not adjacent to the second hole among the sensing electrodes is electrically connected to only one of the sensing lines. 
     In an exemplary embodiment, wherein the input sensing unit further comprises a guard line which is disposed on the adjacent area of the base layer to form a closed loop along edges of the second hole. 
     In an exemplary embodiment, wherein each of the sensing electrodes and the first connection wiring comprises a transparent conductive pattern, and the first connection wiring comprises a metal conductive pattern disposed on the transparent conductive pattern. 
     In an exemplary embodiment, wherein the input sensing unit further comprises a sensing wiring which is connected to an end of one of the detection electrodes, and a line width of the first connection wiring is greater than that of the sensing wiring. 
     In an exemplary embodiment, wherein the input sensing unit further comprises a second connection wiring which is disposed on the adjacent area and electrically connects detection electrodes spaced apart by the second hole among the detection electrodes, wherein the line width of the first connection wiring is different from that of the second connection wiring. 
     In an exemplary embodiment, wherein the display unit comprises: a first substrate; a second substrate which is disposed opposite the first substrate; a display element layer which is disposed between the first substrate and the second substrate; and a sealing member which is disposed between the first substrate and the second substrate to surround the first hole and seal the first substrate and the second substrate, wherein the first connection wiring overlap the sealing member. 
     In an exemplary embodiment, the display device further comprising a window unit which is disposed on the display unit, wherein the window unit comprises a light shielding pattern overlapping the adjacent area. 
     In an exemplary embodiment, wherein the display unit comprises wirings overlapping the adjacent area, and the first connection wiring overlaps at least two of the wirings. 
     In an exemplary embodiment, wherein the display unit comprises: a base layer; and a plurality of dams which are formed adjacent to the first hole, wherein each of the dams forms a closed loop along edges of the first hole, and the first connection wiring overlaps at least one of the dams. 
     In an exemplary embodiment, wherein the display unit further comprises a groove formed between the dams, wherein the groove is inversely tapered. 
     According to another exemplary embodiment of the present application, a display device comprising: a substrate which comprises a display area, a non-display area disposed along edges of the display area, and a first hole formed in the display area; a circuit element layer which is disposed on the substrate and comprises a transistor; a display element layer which is disposed on the circuit element layer, overlaps the display area, and comprises a light emitting element electrically connected to the transistor; a thin-film encapsulation layer which is disposed on the display element layer; and an input sensing layer which is disposed on the thin-film encapsulation layer and comprises detection electrodes overlapping the display area and a connection wiring electrically connecting detection electrodes separated from each other by the first hole among the detection electrodes, wherein the connection wiring is located adjacent to the first hole. 
     In an exemplary embodiment, wherein the detection electrodes comprise a metal conductive layer of a metal mesh pattern, a portion of the connection wiring which overlaps one of the detection electrodes is a metal mesh pattern, and the detection electrodes do not overlap the light emitting element. 
     In an exemplary embodiment, wherein the detection electrodes comprise sensing electrodes arranged in a first direction and connected to each other and driving electrodes arranged in a second direction perpendicular to the first direction and connected to each other, wherein a first driving electrode and a second driving electrode spaced apart from each other by the second hole among the driving electrodes are electrically connected by the connection wiring. 
     In an exemplary embodiment, wherein the detection electrodes further comprise first connection parts which electrically connect the sensing electrodes to each other, wherein a first sensing electrode and a second sensing electrode disposed adjacent to the second hole among the sensing electrodes are electrically connected to each other by a first adjacent connection part among the first connection parts, and the first adjacent connection part is located on a first reference boundary line set based on the second hole. 
     In an exemplary embodiment, wherein the first connection parts are located on one imaginary line, and the first adjacent connection part is located at an intersection point of the imaginary line and the first reference boundary line. 
     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 device according to an embodiment; 
         FIGS.  2 A and  2 B  are cross-sectional views illustrating examples of the display device taken along line A-A′ of  FIG.  1   ; 
         FIG.  3    is a plan view illustrating an example of an input sensing panel included in the display device of  FIG.  2   ; 
         FIGS.  4 A,  4 B, and  4 C  are enlarged views illustrating an example of a first area of  FIG.  3   ; 
         FIG.  5    is a cross-sectional view illustrating an example of the input sensing panel taken along line B-B′ of  FIG.  4 A ; 
         FIG.  6    is an enlarged view illustrating an example of area A 2  of  FIG.  4 A ; 
         FIGS.  7 A and  7 B  are cross-sectional views illustrating other examples of the input sensing panel taken along the line B-B′ of  FIG.  4 A ; 
         FIGS.  8 A and  8 B  are enlarged views of area A 3  of  FIG.  4 A ; 
         FIG.  9    is an enlarged view of another example of the area A 1  of  FIG.  3   ; 
         FIG.  10    is a plan view illustrating an example of a display panel included in the display device of  FIG.  2   ; 
         FIG.  11    is a circuit diagram illustrating an example of a pixel included in the display panel of  FIG.  10   ; 
         FIG.  12    is a cross-sectional view illustrating an example of the display panel taken along line C-C′ of  FIG.  10   ; 
         FIG.  13    is an enlarged cross-sectional view of area A 5  of  FIG.  12   ; 
         FIG.  14    illustrates a process of manufacturing the display panel of  FIG.  12   ; 
         FIG.  15    is an enlarged plan view of area A 4  of  FIG.  10   ; 
         FIG.  16    is a cross-sectional view illustrating an example of the display device taken along line D-D′ of  FIG.  15   ; 
         FIG.  17    is a cross-sectional view illustrating another example of the display panel taken along the line C-C′ of  FIG.  10   ; 
         FIGS.  18 A,  18 B, and  18 C  are enlarged cross-sectional views of area A 5  of  FIG.  17   ; 
         FIGS.  19 A,  19 B,  19 C, and  19 D  are plan views illustrating examples of the display panel of  FIG.  17   ; 
         FIG.  20    is a cross-sectional view illustrating another example of the display device taken along the line A-A′ of  FIG.  1   ; 
         FIG.  21    is a cross-sectional view illustrating an example of an input sensing panel included in the display device of  FIG.  20   ; 
         FIG.  22    illustrates another example of the display device taken along the line A-A′ of  FIG.  1   ; 
         FIG.  23    is a perspective view of a display device according to another embodiment; 
         FIG.  24    illustrates another example of an input sensing panel included in the display device of  FIG.  23   ; 
         FIG.  25    is a cross-sectional view illustrating another example of the display device taken along the line A-A′ of  FIG.  1   ; 
         FIG.  26    is a plan view of a portion of an input sensing layer included in the display device of  FIG.  25   ; 
         FIGS.  27 A and  27 B  are cross-sectional views illustrating examples of the input sensing layer included in the display device of  FIG.  25   ; 
         FIG.  28    is a plan view of a portion of a first conductive layer included in  FIG.  27 A ; 
         FIG.  29    is an enlarged view of area A 7  of  FIG.  28   ; 
         FIG.  30    is a plan view of a portion of a second conductive layer included in  FIG.  27 A ; 
         FIG.  31    is an enlarged view of area A 7  of  FIG.  30   ; 
         FIG.  32    is an enlarged view of area A 6  of  FIG.  26   ; and 
         FIG.  33    is a cross-sectional view illustrating an example of the input sensing layer taken along line D-D′ of  FIG.  31   . 
     
    
    
     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, the DR 1 -axis, the DR 2 -axis, and the DR 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 DR 1 -axis, the DR 2 -axis, and the DR 3 -axis may be perpendicular to one another, or may represent different directions that are not perpendicular 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. 
     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 device according to an embodiment. 
     Referring to  FIG.  1   , a display device  1  may display an image on a display surface (or a front surface). The display surface may be parallel to a plane defined by a first directional axis (i.e., an axis extending in a first direction DR 1 ) and a second directional axis (i.e., an axis extending in a second direction DR 2 ). A normal direction of the display surface, that is, a thickness direction of the display device  1  may be defined as a third direction DR 3 . 
     The front surface (or upper surface) and back surface (or lower surface) of each member or unit to be described below may be distinguished along the third direction DR 3 . However, the first, second, and third directions DR 1 , DR 2 , and DR 3  illustrated in the current embodiment are merely an example. The first, second, and third directions DR 1 , DR 2 , and DR 3  are relative concepts and can be changed to other directions. The first, second, and third directions will hereinafter be indicated by the same reference numerals. 
     The display device  1  may include a flat display surface, but the present disclosure is not limited to this case. For example, the display device  1  may also include a curved display surface or a stereoscopic display surface. The stereoscopic display surface may include a plurality of display areas indicating different directions and include, e.g., a polygonal columnar display surface. 
     The display device  1  may be a rigid display device. However, the present disclosure is not limited to this case. For example, the display device  1  may be a flexible display device. In  FIG.  1   , the display device  1  applicable to a mobile phone terminal is illustrated as an example. Although not illustrated in  FIG.  1   , electronic modules, a camera module, a power module, etc. mounted on a mainboard may be placed in a bracket/case together with the display device  1  to form a mobile phone terminal. The display device  1  is applicable to large-sized electronic devices such as televisions and monitors as well as to small and medium-sized electronic devices such as tablet computers, car navigation systems, game machines and smart watches. 
     The display surface includes a display area DA where an image is displayed and a non-display area NDA adjacent to the display area DA. The non-display area NDA is an area where no image is displayed. 
     The display area DA may be quadrilateral in shape and have rounded corners. The non-display area NDA may surround the display area DA. However, the present disclosure is not limited to this case, and the shape of the display area DA and the shape of the non-display area NDA may be relatively designed. 
     In embodiments, the display device  1  may include a hole AH (or an internal groove) formed in the display area DA. As will be described later with reference to  FIG.  2   , the hole AH may penetrate a display panel and an input sensing unit (or an input sensing panel) included in the display device  1  along the third direction DR 3 . At a position corresponding to the hole AH, sensors such as a camera device and an infrared sensor may be disposed on a bottom side (e.g., on a lower surface opposite the display surface) of the display device  1 . 
     In  FIG.  1   , the hole AH has a quadrilateral planar shape with rounded corners. However, this is merely an example, and the planar shape of the hole AH is not limited to this example. For example, the hole AH may have a circular, quadrilateral, or polygonal planar shape. The display device  1  may also include a plurality of holes formed in the display area DA. 
     As described with reference to  FIG.  1   , the display device  1  may include the hole AH formed in the display area DA. Thus, the display device  1  can have a minimized dead space as compared with a display device having sensors disposed on one side (e.g., in the non-display area NDA). 
       FIGS.  2 A and  2 B  are cross-sectional views illustrating examples of the display device taken along line A-A′ of  FIG.  1   . 
     Referring to  FIG.  2 A ,  FIG.  2 A  illustrates a cross section defined by the second directional axis DR 2  and the third directional axis DR 3 , and  FIG.  2 A  schematically illustrates the stacked relationship of functional panels and/or functional units constituting the display device  1 . 
     The display device  1  may include a display panel, an input sensing unit, an antireflection unit, and a window unit. At least some of the display panel, the input sensing unit, the antireflection unit and the window unit may be formed by a continuous process or may be bonded to each other by an adhesive member. Although an optically clear adhesive member OCA is illustrated in  FIG.  2 A  as an example of the adhesive member, this is merely an example. The adhesive member to be described below may include a conventional adhesive or gluing agent. In an embodiment of the present disclosure, the antireflection unit and the window unit may be replaced with other units or may be omitted. 
     Of the input sensing unit, the antireflection unit and the window unit, a unit formed with another unit through a continuous process is expressed as a “layer”. Of the input sensing unit, the antireflection unit and the window unit, a unit bonded to another unit by an adhesive member is expressed as a “panel”. The panel includes a base layer that provides a base surface, such as a synthetic resin film, a composite film, or a glass substrate. However, the “layer” may not include the base layer. That is, units expressed as “layers” may be disposed on a base surface provided by another unit. 
     The input sensing unit, the antireflection unit, and the window unit may be referred to as an input sensing panel  200 , an antireflection panel  300  and a window panel  400  or as an input sensing layer, an antireflection layer and a window layer depending on the presence or absence of the base layer. 
     Referring to  FIG.  2 A , the display device  1  may include a display panel  100 , the input sensing panel  200 , the antireflection panel  300 , and the window panel  400 . 
     The input sensing panel  200  may be disposed on the display panel  100 , and the optically clear adhesive member OCA may be disposed between the display panel  100  and the input sensing panel  200 . Similarly, the antireflection panel  300  may be disposed on the input sensing panel  200 , and the optically clear adhesive member OCA may be disposed between the input sensing panel  200  and the antireflection panel  300 . The window panel  400  may be disposed on the antireflection panel  300 , and the optically clear adhesive member OCA may be disposed between the antireflection panel  300  and the window panel  400 . The order in which the input sensing panel  200  and the antireflection panel  300  are stacked can be changed. 
     The hole AH of the display device  1  may penetrate the display panel  100 , the input sensing panel  200  and the antireflection panel  300 . A camera device, an infrared sensor, etc. may be disposed on the lower surface of the display device  1  at a position corresponding to a hole area OA (i.e., an area where the hole AH is located). 
     Each of the display panel  100 , the input sensing panel  200  and the antireflection panel  300  may include a hole (or a through hole or an opening) corresponding to the hole AH. Similarly, the optically clear adhesive member OCA disposed between the display panel  100  and the input sensing panel  200  may include a hole. The size of the hole of the optically clear adhesive member OCA disposed between the display panel  100  and the input sensing panel  200  may be larger than that of the hole AH. For example, a width D 2  (or diameter) of the hole of the optically clear adhesive member OCA may be greater than a width D 1  of the hole AH (or the hole area OA). Similarly, the optically clear adhesive member OCA disposed between the input sensing panel  200  and the antireflection panel  300  may also include a hole, and the size of the hole of the optically clear adhesive member OCA disposed between the input sensing panel  200  and the antireflection panel  300  may be equal to or larger than that of the hole AH. 
     The window panel  400  may not include a hole and may cover the hole area OA. 
     The display panel  100  may generate an image. The display panel  100  may be, but is not limited to, a light emitting display panel. For example, the display panel  100  may be an organic light emitting display panel or a quantum dot light emitting display panel. A light emitting layer of 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 quantum dots, quantum rods, etc. The display panel  100  will hereinafter be described as the organic light emitting display panel. 
     The input sensing panel  200  may obtain coordinate information of an external input (e.g., a touch event). The input sensing panel  200  may be a touch sensing panel that senses a user&#39;s touch or a fingerprint sensing panel that senses fingerprint information of a user&#39;s finger. The pitch and width of detection electrodes to be described below (i.e., detection electrodes included in the input sensing panel  200 ) may be changed according to the use of the input sensing unit. Detection electrodes of the touch sensing panel may have a width of several mm to tens of mm, and detection electrodes of the fingerprint sensing panel may have a width of tens of μm to hundreds of μm. The input sensing panel  200  will hereinafter be described as the touch sensing panel. 
     The antireflection panel  300  may reduce reflectance of external light incident from above the window panel  400 . 
     In an embodiment, the antireflection panel  300  may include a retarder and a polarizer. The retarder may be of a film type or a liquid crystal coating type and may include a λ/2 retarder and/or a λ/4 retarder. The polarizer may also be of a film type or a liquid crystal coating type. The film type may include a stretch-type synthetic resin film, and the liquid crystal coating type may include liquid crystals arranged in a predetermined arrangement. Each of the retarder and the polarizer may further include a protective film. The retarder and the polarizer themselves or the protective films may be defined as a base layer of the antireflection panel  300 . 
     In an embodiment, the antireflection panel  300  may include color filters. The color filters may have a predetermined arrangement. The arrangement of the color filters may be determined in consideration of emission colors of pixels included in the display panel  100 . The antireflection panel  300  may further include a black matric adjacent to the color filters. 
     The window panel  400  may include a base film  410  and a first light shielding pattern  420 . The base film  410  may include a glass substrate and/or a synthetic resin film. The base film  410  may be a single layer. However, the present disclosure is not limited to this case, and the base film  410  may also include two or more films bonded to each other by an adhesive member. 
     The first light shielding pattern  420  may partially overlap the base film  410 . As illustrated in  FIG.  2 A , the first light shielding pattern  420  may overlap edges of the base film  410  and may be disposed on a back surface of the base film  410  to define a bezel area (e.g., the non-display area NDA) of the display device  1 . The first light shielding pattern  420  may be a colored organic layer and may be formed by, e.g., a coating method. 
     In an embodiment, the window panel  400  may further include a second light shielding pattern  430 . Referring to  FIG.  2 B , the second light shielding pattern  430  may overlap an adjacent area AA of the display device  1  and may be disposed on the back surface of the base film  410 . Here, the adjacent area AA may be defined as an area disposed along edges of the hole area OA within the display area DA. The adjacent area AA may have a generally uniform width along the edges of the hole area OA. As will be described later, no image is displayed and no input is sensed in the adjacent area AA. Accordingly, the adjacent area AA may be classified as the non-display area NDA. The second light shielding pattern  430  may be made of a colored organic layer, like the first light shielding pattern  420 . 
     Although not illustrated separately, the window panel  400  may further include a functional coating layer disposed on a front surface of the base film  410 . The functional coating layer may include an anti-fingerprint layer, antireflection layer, and a hard coating layer. 
     Although the input sensing panel  200  overlaps the whole of the display panel  100  in  FIGS.  2 A and  2 B , the present disclosure is not limited to this case. For example, the input sensing panel  200  may overlap only a part of the display area DA of the display panel  100  or may overlap only the non-display area NDA. 
       FIG.  3    is a plan view illustrating an example of the input sensing panel included in the display device of  FIG.  2   .  FIGS.  4 A,  4 B, and  4 C  are enlarged views illustrating an example of a first area of  FIG.  3   .  FIG.  4 B  illustrates a first conductive layer included in the input sensing panel  200 , and  FIG.  4 C  illustrates a second conductive layer included in the input sensing panel  200 .  FIG.  5    is a cross-sectional view illustrating an example of the input sensing panel taken along line B-B′ of  FIG.  4 A .  FIG.  6    is an enlarged view illustrating an example of area A 2  of  FIG.  4 A . 
     Referring to  FIGS.  3 ,  4 A,  4 B,  4 C,  5 , and  6   , the input sensing panel  200  may have a multilayer structure. The input sensing panel  200  includes detection electrodes, signal lines connected to the detection electrodes, and at least one insulating layer. The input sensing panel  200  may sense an external input using, e.g., a capacitive method. The operation method of the input sensing panel  200  is not particularly limited, and the input sensing panel  200  may also sense an external input using an electromagnetic induction method or a pressure sensing method. 
     Referring to  FIG.  5   , the input sensing panel  200  may include a base layer  210  (or a first base layer), a first conductive layer  220 , a first insulating layer  230 , a second conductive layer  240 , and a second insulating layer  250 . 
     Each of the first conductive layer  220  and the second conductive layer  240  may have a single layer structure or may have a multilayer structure stacked along the third direction DR 3 . A conductive layer having a single layer structure may include a transparent conductive layer. The transparent conductive layer may include a transparent conductive oxide such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), or indium tin zinc oxide (ITZO). Alternatively, the transparent conductive layer may include a conductive polymer such as PEDOT, metal nanowires, graphene, etc. However, the present disclosure is not limited to this case, and the conductive layer may also include a metal layer. The metal layer may include molybdenum, silver, titanium, copper, aluminum, and an alloy of the same. In addition, a conductive layer having a multilayer structure may include multiple metal layers. The metal layers may form, for example, a three-layer structure of titanium/aluminum/titanium. The conductive layer having the multilayer structure may also include at least one metal layer and at least one transparent conductive layer. 
     The stacked structure and material of the detection electrodes may be determined in consideration of sensing sensitivity. Detection electrodes including a transparent conductive layer are not visible to a user as compared with detection electrodes including a metal layer and increase an input area, thereby increasing capacitance. Resistive-capacitive (RC) delay can affect sensing sensitivity. Since the resistance of the detection electrodes including the metal layer is smaller than that of the detection electrodes including the transparent conductive layer, an RC value is reduced. Therefore, the charging time of a capacitor defined between the detection electrodes may be reduced. 
     As will be described later with reference to  FIGS.  26 ,  27 A,  27 B,  28 ,  29 ,  30 ,  31 ,  32 , and  33   , the detection electrodes including the metal layer may have a mesh shape. In this case, the metal layer may not be visible to a user. 
     Each of the first insulting layer  230  and the second insulating layer  250  may have a single layer structure or a multilayer structure. Each of the first insulating layer  230  and the second insulating layer  250  may include an inorganic material, an organic material, or a composite material. 
     At least any one of the first insulating layer  230  and the second insulating layer  250  may include an inorganic layer. The inorganic layer may include at least one of aluminum oxide, titanium oxide, silicon oxide, silicon oxynitride, zirconium oxide, and hafnium oxide. 
     At least any one of the first insulating layer  230  and the second insulating layer  250  may include an organic layer. The organic layer may include at least any one of acrylic resin, methacrylic resin, polyisoprene, vinyl resin, epoxy resin, urethane resin, cellulose resin, siloxane resin, polyimide resin, polyamide resin, and perylene resin. 
     Referring to  FIG.  3   , the input sensing panel  200  may include first detection electrodes (or sensing electrodes), second detection electrodes (or driving electrodes), first signal lines SL 1 , second signal lines SL 2 , third signal lines SL 3  and fourth signal lines SL 4 - 1  and SL 4 - 2 . In addition, the input sensing panel  200  may include first pads IS-PD (or sensing pads) disposed in a first pad area NDA-PD. 
     The first detection electrodes and the second detection electrodes may be disposed in a sensing area IS-DA. Here, the sensing area IS-DA may correspond to the display area DA and overlap the display area DA. 
     The first detection electrodes may extend in the second direction DR 2  and may be repeatedly arranged along the first direction DR 1 . The second detection electrodes may extend in the first direction DR 1  and may be repeatedly arranged along the second direction DR 2 . The first detection electrodes may transmit a sensing signal, and the second detection electrodes may transmit a detection signal. 
     The first detection electrodes and the second detection electrodes intersect each other. In this case, the input sensing panel  200  may sense an external input using a mutual cap method and/or a self-cap method. The input sensing panel  200  may calculate coordinates of an external input using the mutual cap method during a first period and then recalculate the coordinates of the external input using the self-cap method during a second period. 
     Each of the first detection electrodes includes first sensor parts SP 1  (or sensing electrodes) and first connection parts CP 1  (see  FIG.  4 B ). Similarly, each of the second detection electrodes includes second sensor parts SP 2  (or driving electrodes) and second connection parts CP 2  (see  FIGS.  4 A and  4 C ). 
     In one first detection electrode, the first sensor parts SP 1  may be arranged along the second direction DR 2  and may be connected to each other by the first connection parts CP 1 . In one second detection electrode, the second sensor parts SP 2  may be arranged along the first direction DR 1  and may be connected to each other by the second connection parts CP 2 . 
     The first signal lines SL 1 , the second signal lines SL 2 , the third signal lines SL 3  and the fourth signal lines SL 4 - 1  and SL 4 - 2  may be disposed in a non-sensing area IS-NDA. Here, the non-sensing area IS-NDA may correspond to the non-display area NDA and overlap the non-display area NDA. 
     The first signal lines SL 1  may extend from some of the first pads IS-PD of the first pad area NDA-PD along the non-sensing area IS-NDA located on a side (e.g., a right side) of the input sensing panel  200  and may be connected to ends of the second detection electrodes. The first signal lines SL 1  may include first through i th  driving signal lines SL 1 - 1  through SL 1 - i  (where i is an integer equal to or greater than 2), and the first through i th  driving signal lines SL 1 - 1  through SL 1 - i  may be electrically connected to the ends of the second detection electrodes, respectively. 
     Similarly, the second signal lines SL 2  may extend from some other ones of the first pads IS-PD of the first pad area NDA-PD to a side (e.g., a lower side) of the sensing area IS-DA and may be electrically connected to the other ends of the second detection electrodes. The second signal lines SL 2  may include first through i th  detection signal lines SL 2 - 1  through SL 2 - i , and the first through i th  detection signal lines SL 2 - 1  through SL 2 - i  may be electrically connected to the other ends of the second detection electrodes, respectively. 
     The third signal lines SL 3  may extend from some other ones of the first pads IS-PD of the first pad area NDA-PD along the non-sensing area IS-NDA located on the other side (e.g., a left side) of the input sensing panel  200  and may be electrically connected to ends of the first detection electrodes. The third signal lines SL 3  may include first through j th  sensing signal lines SL 3 - 1  through SL 3 - j  (where j is an integer equal to or greater than 2), and the first through j th  sensing signal lines SL 3 - 1  through SL 3 - j  may be electrically connected to the ends of the first detection electrodes. 
     The fourth signal lines SL 4 - 1  and SL 4 - 2  may extend from some other ones of the first pads IS-PD of the first pad area NDA-PD along the non-sensing area IS-NDA located on a side (e.g., the left side) of the input sensing panel  200  and may be connected to the other ends of some of the first detection electrodes, respectively. Here, the some of the first detection electrodes may be detection electrodes including first adjacent sensor parts SP 1 _A 11 , SP 1 _A 12 , SP 1 _A 13 , SP 1 _A 21 , SP 1 _A 22  and SP 1 _A 23  (see  FIG.  4 A ) disposed adjacent to a first hole AH 1 . 
     The input sensing panel  200  including the fourth signal lines SL 4 - 1  and SL 4 - 2  can have improved sensing sensitivity as compared with an input sensing panel including the third signal lines SL 3 - 1  through SL 3   j . The first adjacent sensor parts SP 1 _A 11 , SP 1 _A 12 , SP 1 _A 13 , SP 1 _A 21 , SP 1 _A 22  and SP 1 _A 23  around the first hole AH 1  are generally smaller than the first sensor parts spaced apart from the first hole AH 1 , and no sensor parts are disposed in an area corresponding to the first hole AH 1 . In this case, a sensing signal (or a reception signal) may be dropped or attenuated, leading to a reduction in sensing sensitivity. The input sensing panel  200  transmits a sensing signal not only through the third signal lines SL 3 - 1  through SL 3 - j  connected to the ends of the first detection electrodes but also through the fourth signal lines SL 4 - 1  and SL 4 - 2  connected to the other ends of the first detection electrodes adjacent to the first hole AH 1  (that is, transmits a sensing signal through both ends of some detection electrodes where a sensing signal drop can occur), thereby preventing or reducing the drop of the sensing signal and the resultant reduction of the sensing sensitivity. 
     The arrangement and connection relationship of the first sensor parts SP 1  and the arrangement and connection relationship of the second sensor parts SP 2  will be described with reference to  FIGS.  4 A,  4 B, and  4 C . 
     Referring to  FIG.  4 A , the first sensor parts SP 1  may include first reference sensor parts SP 1 _R and the first adjacent sensor parts SP 1 _A 11 , SP 1 _A 12 , SP 1 _A 13 , SP 1 _A 21 , SP 1 _A 22  and SP 1 _A 23 . The first reference sensor parts SP 1 _R refer to sensor parts spaced apart from the first hole AH 1  by a specific distance (e.g., the average size of the first sensor parts SP 1 ) or more among the first sensor parts SP 1 . The first adjacent sensor parts SP 1 _A 11 , SP 1 _A 12 , SP 1 _A 13 , SP 1 _A 21 , SP 1 _A 22  and SP 1 _A 23  may be sensor parts adjacent to the first hole AH 1  among the first sensor parts SP 1 . 
     The first adjacent sensor parts SP 1 _A 11 , SP 1 _A 12 , SP 1 _A 13 , SP 1 _A 21 , SP 1 _A 22  and SP 1 _A 23  may have a different planar shape from the first reference sensor part SP 1 _R. In addition, the first adjacent sensor parts SP 1 _A 11 , SP 1 _A 12 , SP 1 _A 13 , SP 1 _A 21 , SP 1 _A 22  and SP 1 _A 23  may have different shapes from each other and may be partially curved. Further, the first adjacent sensor parts SP 1 _A 11 , SP 1 _A 12 , SP 1 _A 13 , SP 1 _A 21 , SP 1 _A 22  and SP_A 23  may have a size (or area) different from the size (or area) of the first sensor parts SP 1 . 
     Referring to  FIG.  4 B , a (1,1) first adjacent sensor part SP 1 _A 11  may be shaped as a rhombus having a corner (e.g., a corner adjacent to the first hole AH 1 ) partially cut off so as to correspond to the shape of the first hole AH 1 . A side of the (1,1) first adjacent sensor part SP 1 _A 11  may be spaced apart from an edge of the first hole AH 1  by a uniform distance and may include a curved portion corresponding to the shape of the first hole AH 1 . In addition, the (1,1) first adjacent sensor part SP 1 _A 11  may have a size (or area) smaller than the size (or area) of the first reference sensor parts SP 1 _R. a (1,2) first adjacent sensor part SP 1 _A 12  may have a pentagonal planar shape, may not include a curved portion, and may have a relatively small size. (1,3), (2,1), (2,2), and (2,3) first adjacent sensor parts SP 1 _A 13 , SP 1 _A 21 , SP 1 _A 22 , and SP 1 _A 23  may have different planar shapes, may or may not include a curved portion, and may have different sizes. 
     At least one corner of each of the first adjacent sensor parts SP 1 _A 11 , SP 1 _A 12 , SP 1 _A 13 , SP 1 _A 21 , SP 1 _A 22  and SP 1 _A 23  may be located on a first reference boundary line L_REF 1 . Here, the first reference boundary line L_REF 1  may be a closed loop line spaced apart from the first hole AH 1  by a specific distance (e.g., by 20% to 50% of the length of the first reference sensor parts SP 1 _R). 
     The first adjacent sensor parts SP 1 _A 11 , SP 1 _A 12 , SP 1 _A 13 , SP 1 _A 21 , SP 1 _A 22  and SP 1 _A 23  may be connected to adjacent first sensor parts by first adjacent connection parts CP 1 _ 11 , CP 1 _ 12 , CP 1 _ 13 , CP 1 _ 21 , CP 1 _ 22 , and CP 1 _ 23 , respectively. The first adjacent connection parts CP 1 _ 11 , CP 1 _ 12 , CP 1 _ 13 , CP 1 _ 21 , CP 1 _ 22 , and CP 1 _ 23  may be spaced apart from the first hole AH 1  by a specific distance and may be located on the first reference boundary line L_REF 1  as illustrated in  FIG.  4 B . 
     For reference, the first sensor parts SP 1  (or the first reference sensor parts SP 1  having the same size and the same shape without being affected by the first hole AH 1 ) may be repeatedly disposed along the first direction DR 1  and the second direction DR 2 . Accordingly, the first connection parts CP 1  (or first reference connection parts CP 1 _R) connecting the first sensor parts SP 1  may be disposed in intersection areas of horizontal reference lines LH 1 , LH 2 , and LH 3  and vertical reference lines LV 1 , LV 2 , and LV 3 . 
     However, when the intersection areas (or intersection points) of the horizontal reference lines LH 1 , LH 2 , and LH 3  and the vertical reference lines LV 1 , LV 2 , and LV 3  are located inside the first hole AH 1  or adjacent to the first hole AH 1 , the first adjacent connection parts CP 1 _ 11 , CP 1 _ 12 , CP 1 _ 12 , CP 1 _ 13 , CP 1 _ 21 , CP 1 _ 22 , and CP 1 _ 23  may be formed in the intersection areas and connect the first adjacent sensor parts SP 1 _A 11 , SP 1 _A 12 , SP 1 _A 13 , SP 1 _A 21 , SP 1 _A 22  and SP 1 _A 23  to adjacent first sensor parts, respectively. 
     Therefore, as illustrated in  FIG.  4 B , a first detection electrode including the first adjacent sensor parts SP 1 _A 11 , SP 1 _A 12 , and SP 1 _A 13  (i.e., a detection electrode corresponding to a first horizontal reference line LH 1 ) may bypass the first hole AH 1 . Similarly, a second detection electrode including the second adjacent sensor parts SP 1 _A 21  through SP 1 _A 23  (i.e., a detection electrode corresponding to a second horizontal reference line LH 2 ) may bypass the first hole AH 1 . 
     Referring again to  FIG.  4 A , the second sensor parts SP 2  may include second reference sensor parts SP 2 _R and second adjacent sensor parts SP 2 _A 11 , SP 2 _A 12 , SP 2 _A 13 , SP 2 _A 14 , SP 2 _A 22 , and SP 2 _A 23 . Like the first reference sensor parts SP 1 _R, the second reference sensor parts SP 2 _R may refer to sensor parts spaced apart from the first hole AH 1  by a specific distance (e.g., the average size of the second sensor parts SP 2 ) or more among the second sensor parts SP 2 . The second adjacent sensor parts SP 2 _A 11 , SP 2 _A 12 , SP 2 _A 13 , SP 2 _A 14 , SP 2 _A 22 , and SP 2 _A 23  may be sensor parts adjacent to the first hole AH 1  among the second sensor parts SP 2 . 
     The second adjacent sensor parts SP 2 _A 11 , SP 2 _A 12 , SP 2 _A 13 , SP 2 _A 14 , SP 2 _A 22 , and SP 2 _A 23  may have a different planar shape from the second reference sensor part SP 2 _R, may be partially curved, and may have a size (or area) different from the size (or area) of the second reference sensor parts SP 2 . The planar shape and size of the second adjacent sensor parts SP 2 _A 11 , SP 2 _A 12 , SP 2 _A 13 , SP 2 _A 14 , SP 2 _A 22 , and SP 2 _A 23  are illustrated by way of example in  FIG.  4 A  and have similar features to those of the first adjacent sensor parts SP 1 _A 11 , SP 1 _A 12 , SP 1 _A 13 , SP 1 _A 21 , SP 1 _A 22  and SP 1 _A 23 . Thus, a redundant description will now be repeated. 
     At least one corner of each of the second adjacent sensor parts SP 2 _A 11 , SP 2 _A 12 , SP 2 _A 13 , SP 2 _A 14 , SP 2 _A 22 , and SP 2 _A 23  may be located on the first reference boundary line L_REF 1 . The second adjacent sensor parts SP 2 _A 11 , SP 2 _A 12 , SP 2 _A 13 , SP 2 _A 14 , SP 2 _A 22 , and SP 2 _A 23  may be connected to adjacent first sensor parts by second adjacent connection parts CP 2 _ 11 , CP 2 _ 12 , CP 2 _ 13  CP 2 _ 21 , CP 2 _ 22 , and CP 2 _ 23 . 
     Referring to  FIG.  4 C , the second adjacent connection parts CP 2 _ 11 , CP 2 _ 12 , CP 2 _ 13  CP 2 _ 21 , CP 2 _ 22 , and CP 2 _ 23  may be spaced apart from the first hole AH 1  by a specific distance and may be located on the first reference boundary line L_REF 1 . The second adjacent connection parts CP 2 _ 11 , CP 2 _ 12 , CP 2 _ 13  CP 2 _ 21 , CP 2 _ 22 , and CP 2 _ 23  may be located on a different plane (or different layer) from the first adjacent connection parts CP 1 _ 11 , CP 1 _ 12 , CP 1 _ 12 , CP 1 _ 13 , CP 1 _ 21 , CP 1 _ 22 , and CP 1 _ 23  and may overlap the first adjacent connection parts CP 1 _ 11 , CP 1 _ 12 , CP 1 _ 12 , CP 1 _ 13 , CP 1 _ 21 , CP 1 _ 22 , and CP 1 _ 23 , respectively. 
     As illustrated in  FIG.  4 C , the second adjacent connection parts CP 2 _ 11 , CP 2 _ 12 , CP 2 _ 13  CP 2 _ 21 , CP 2 _ 22 , and CP 2 _ 23  may be disposed in intersection areas of the vertical reference lines LV 1 , LV 2 , and LV 3  and the first reference boundary line L_REF 1 , but the present disclosure is not limited to this case. 
     Although the first sensor parts SP 1  and the second sensor parts SP 2  have a generally rhombic planar shape in  FIG.  3   , the present disclosure is not limited to this case. For example, the first sensor parts SP 1  and the second sensor parts SP 2  may also have a circular or other polygonal shape. In addition, the first detection electrodes and the second detection electrodes including the first sensor parts SP 1  and the second sensor parts SP 2  may have a shape (e.g., a bar shape) in which there is no distinction between sensor parts and connection parts. 
     In embodiments, the input sensing panel  200  may further include first and second connection wirings CL 1  and CL 2  (see  FIG.  4 A ) (or first and second connection patterns) connecting the second sensor parts SP 2  adjacent to the first hole AH 1 , that is, the second adjacent sensor parts SP 2 _A 12 , SP 2 _A 13 , SP 2 _A 22 , and SP 2 _A 23 . 
     The first hole AH 1  may have a quadrilateral planar shape with rounded corners. The length of the first hole AH 1  in the second direction DR 2  may be greater than the length of the first hole AH 1  in the first direction DR 1 . For example, the length of the first hole AH 1  in the first direction DR 1  may be similar to the length of the first reference sensor parts SP 1 _R (or the second reference sensor parts SP 2 _R), and the length of the first hole AH 1  in the second direction DR 1  may be about twice the length of the first hole AH 1  in the first direction DR 1 . 
     In this case, at least one second detection electrode disposed adjacent to the first hole AH 1  or intersecting the first hole AH 1  may be separated by the first hole AH 1 . That is, some of the second sensor parts SP 2  constituting the second detection electrode may be spaced apart from each other by the first hole AH 1 . The connection wirings CL 1  and CL 2  may electrically connect the second sensor parts SP 2  spaced apart from each other by the first hole AH 1 . 
     The connection wirings CL 1  and CL 2  may be formed in the same plane (or layer) as the first sensor parts SP 1 , the second sensor parts SP 2 , etc. and may be disposed in an adjacent area IS-AA located adjacent to the first hole AH 1 . The width of the adjacent area IS-AA may be determined by the size of the first hole AH 1 . For example, the width of the adjacent area IS-AA may increase as the size of the first hole AH 1  increases and decrease as the size of the first hole AH 1  decreases, but may be saturated at a specific value. 
     The first connection wiring CL 1  may extend along a side (e.g., the left side) of the adjacent area IS-AA and may electrically connect a (1,2) second adjacent driving sensor part SP 2 _A 12  (or a twelfth driving sensor part) and a (2,2) second adjacent driving sensor part SP 2 _A 22  (or a twenty-second driving sensor part). Similarly, the second connection wiring CL 2  may extend along the other side (e.g., the right side) of the adjacent area IS-AA and electrically connect a (1,3) second adjacent driving sensor part SP 2 _A 13  (or a thirteenth driving sensor part) and a (2,3) second adjacent driving sensor part SP 2 _A 23  (or a twenty-third driving sensor part). 
     Therefore, as illustrated in  FIG.  4 C , a second detection electrode including the (1,2) second adjacent driving sensor part SP 2 _A 12  and the (2, 3) second adjacent driving sensor part SP 2 _A 22  (i.e., a detection electrode corresponding to a second vertical reference line LV 2 ) may bypass the first hole AH 1 . Similarly, a second detection electrode including the (1,3) second adjacent driving sensor part SP 2 _A 13  and the (2,3) second adjacent driving sensor part SP 2 _A 23  (i.e., a detection electrode corresponding to a third vertical reference line LV 3 ) may bypass the first hole AH 1 . 
     In embodiments, the first and second connection wirings CL 1  and CL 2  may have a specific line width. For example, the line width of the first and second connection wirings CL 1  and CL 2  may be greater than the line width (e.g., several μm) of the signal wirings SL 1  through SL 4  illustrated in  FIG.  4 A . The line width of the first and second connection wirings CL 1  and CL 2  will be described later with reference to  FIGS.  8 A and  8 B . 
     The first and second connection wirings CL 1  and CL 2  may be arranged along relatively short paths and may not overlap each other. However, the present disclosure is not limited to this case. For example, the first and second connection wirings CL 1  and CL 2  may be disposed along the same side with respect to the center of the area of the first hole AH 1  and may overlap each other or may be adjacent to each other. This will be described later with reference to  FIG.  8 B . 
     The input sensing panel  200  may further include a second guard wiring GRL 2 . The second guard wiring GRL 2  may be disposed closer to the first hole AH 1  than the connection wirings CL 1  and CL 2  in the adjacent area IS-AA, that is, may be disposed closest to the first hole AH 1  among the wirings disposed in the adjacent area AA. The second guard wiring GRL 2  may protect other wirings (e.g., the connection wirings CL 1  and CL 2 ) and the sensor parts SP 1  and SP 2  from the shock transmitted from the first hole AH 1 , the static electricity flowing from the first hole AH 1 , etc. 
     As described above with reference to  FIGS.  4 A,  4 B, and  4 C , the first adjacent sensor parts SP 1 _A 11 , SP 1 _A 12 , SP 1 _A 13 , SP 1 _A 21 , SP 1 _A 22  and SP 1 _A 23  disposed adjacent to the first hole AH 1  may be electrically connected to each other by the first adjacent connection parts CP 1 _ 11 , CP 1 _ 12 , CP 1 _ 12 , CP 1 _ 13 , CP 1 _ 21 , CP 1 _ 22 , and CP 1 _ 23  disposed on the first reference boundary line L_REF 1  (i.e., a closed loop line spaced apart from an edge of the first hole AH 1  by a specific distance). In addition, the second adjacent sensor parts SP 2 _A 11 , SP 2 _A 12 , SP 2 _A 13 , SP 2 _A 14 , SP 2 _A 22 , and SP 2 _A 23  disposed adjacent to or contacting the first hole AH 1  may be electrically connected to each other by the connection wirings CL 1  and CL 2  disposed in the adjacent area IS-AA. 
     As described above, a drop of a sensing signal (or a reception signal) due to a change (e.g., a reduction) in the shape, size, or area of the first adjacent sensor parts SP 1 _A 11 , SP 1 _A 12 , SP 1 _A 13 , SP 1 _A 21 , SP 1 _A 22  and SP 1 _A 23  may be compensated by the fourth signal lines SL 4 - 1  and SL 4 - 2 . 
     The stacked structure of the input sensing panel  200  will now be described in more detail. 
     Referring to  FIG.  5   , the first conductive layer  220  includes the first sensor parts SP 1 , the second sensor parts SP 2 , and the first connection parts CP 1 . The second sensor parts SP 2  may be spaced apart from the first connection parts CP 1  (or the first sensor parts SP 1 ). 
     The first conductive layer  220  may further include the first signal lines SL 1 , the first connection wiring CL 1  (and the second connection wiring CL 2 ), and the second guard wiring GRL 2 . In addition, the first conductive layer  220  may include the second signal lines SL 2  (see  FIG.  3   ), the third signal lines SL 3  (see  FIG.  3   ) and the fourth signal lines SL 4 - 1  and SL 4 - 2  (see  FIG.  3   ) formed by the same process as the first signal lines SL 1  and may include the first pads IS-PD (see  FIG.  3   ). 
     The first sensor parts SP 1 , the second sensor parts SP 2  and the first connection parts CP 1  may be formed by the same process. The first sensor parts SP 1 , the second sensor parts SP 2  and the first connection parts CP 1  may include the same material and may have the same stacked structure. 
     The first insulating layer  230  covers at least a portion of each of the first sensor parts SP 1 , the second sensor parts SP 2  and the first connection parts CP 1 . In addition, the first insulating layer  230  may cover the first signal lines SL 1 , the first connection wiring CL 1  (and the second connection wiring CL 2 ), and the second guard wiring GRL 2 . The first insulating layer  230  may overlap at least a portion of each of the sensing area IS-DA and the non-sensing area IS-NDA. 
     The first insulating layer  230  may include first insulating patterns IS-ILP, and the first insulating patterns IS-ILP may overlap the first sensor parts SP 1  and the second sensor parts SP 2  and may cover the first connection parts CP 1 . Referring to  FIG.  6   , a first insulating pattern IS-ILP may have an area center corresponding to an area center of a first connection part CP 1 , may be large enough to cover the first connection part CP 1 , and may cover adjacent corners of first sensor parts SP 1  and second sensor parts SP 2 . The first insulating pattern IS-ILP (and the second insulating layer  250  to be described later) may fill a gap between the first sensor parts SP 1  and the second sensor parts SP 2  spaced apart from each other. Accordingly, the first sensor parts SP 1  and the second sensor parts SP 2  may be insulated from each other. Similarly, sensor parts included in different detection electrodes may be insulated by the second insulating layer  250  to be described later. 
     Referring again to  FIG.  5   , the second conductive layer  240  includes the second connection parts CP 2 . The second connection parts CP 2  are electrically connected to the second sensor parts SP 2  through contact holes CNT. The second connection parts CP 2  may include a material having a resistance lower than that of the second sensor parts SP 2 . For example, the second connection parts CP 2  may include the same metal material as the first signal lines SL 1 . 
     In embodiments, each of the second connection parts CP 2  may include a plurality of sub-connection parts. 
     Referring to  FIG.  6   , each of the second connection parts CP 2  may include sub-connection parts CP 2 - 1  and CP 2 - 2 . 
     A second connection part CP 2  may intersect a first connection part CP 1 . The width of the second connection part CP 2  (i.e., the width in plan view) should be minimized in order to reduce the influence of parasitic capacitance. In this case, a signal (e.g., a transmission signal) may be greatly dropped according to a reduction in the width of the second connection part CP 2 . Therefore, the second connection part CP 2  may include a plurality of sub-connection parts CP 2 - 1  and CP 2 - 2  connected in parallel to each other, thereby preventing or reducing the drop of a signal (e.g., a transmission signal). The sub-connection parts CP 2 - 1  and CP 2 - 2  may extend in a fourth direction DR 4  different from the first direction DR 1  and the second direction DR 2  and may connect adjacent second sensor parts SP 2 . 
     Depending on the placement of the second connection part CP 2 , corners (or most adjacent portions) of the second sensor parts SP 2  (and the first sensor parts SP 1 ) may be misaligned with the same horizontal reference line (i.e., a line extending in the second direction DR 2 ) (or a vertical reference line extending in the first direction DR 1 ). 
     Like the second connection part CP 2 , the width of the first connection part CP 1  overlapping the second connection part CP 2  may be minimized. As illustrated in  FIG.  6   , the width of an overlap portion of the first connection part CP 1  (i.e., a portion overlapping the second connection part CP 2 ) may be smaller than the average width of the first connection part CP 1 . 
     Referring again to  FIG.  5   , the second insulating layer  250  may be disposed on the second conductive layer  240  and cover elements disposed under the second insulating layer  250 . At least a portion of the second insulating layer  250  may contact the base layer  210 , for example, may directly contact the base layer  210  at a boundary with the first hole AH 1  to insulate sensor parts (e.g., the second sensor parts SP 2 ) included in different detection electrodes adjacent to each other. In addition, the second insulating layer  2500  may directly contact the base layer  210  at an outermost boundary of the non-display area IS-NDA. 
     The first insulating layer  230  may be a polymer layer, for example, an acrylic polymer layer. The second insulating layer  250  may also be a polymer layer, for example, an acrylic polymer layer. The polymer layer can improve the flexibility of the display device  1  even when the input sensing panel  200  is disposed on the display panel  100 . In order to improve flexibility, the first sensor parts SP 1  and the second sensor parts SP 2  may have a mesh shape and include a metal. The first sensor parts SP 1  and the second sensor parts SP 2  may be referred to as metal mesh patterns. 
     Although not illustrated in  FIG.  5   , the connection wirings CL 1  may be disposed not only in the first conductive layer  220  but also in the second conductive layer  240 , like a connection wiring to be described later with reference to  FIG.  27 A . In this case, a signal drop due to the connection wirings CL 1  can be reduced, and a reduction in sensing sensitivity can be reduced. 
     As described with reference to  FIGS.  3 ,  4 A,  4 B,  5 , and  6   , the input sensing panel  200  may include the first hole AH 1  (i.e., the first hole AH 1  formed to correspond to the hole AH of the display device  1  in which a sensor such as a camera device is disposed), and the first adjacent sensor parts SP 1 _A 11 , SP 1 _A 12 , SP 1 _A 13 , SP 1 _A 21 , SP 1 _A 22  and SP 1 _A 23  which interfere with the first hole AH 1  may be connected to each other along the first reference boundary line L_REF 1  (i.e., a closed loop line spaced apart from an edge of the first hole AH 1  by a specific distance). In addition, the second adjacent sensor parts SP 2 _A 12 , SP 2 _A 13 , SP 2 _A 22 , and SP 2 _A 23  which interfere with the first hole AH 1  and are spaced apart from each other may be electrically connected to each other by the connection wirings CL 1  and CL 2  disposed in the adjacent area AA. 
     Therefore, while the display device  1  includes the hole AH in the display area DA, it can sense an external input (e.g., a user&#39;s touch input) through the entire display area DA surrounding the hole AH. 
     In addition, since the input sensing device  200  provides double routing (or multipathing) for first detection electrodes including first sensor parts adjacent to the first hole AH 1  (i.e., first detection electrodes interfering with the first hole AH 1 ) through the fourth signal lines SL 4 - 1  and SL 4 - 2 , the drop of a sensing signal and the reduction of sensing sensitivity can be reduced or prevented. 
     Further, since the connection wirings CP 1  and CP 2  and the fourth signal lines SL 4 - 1  and SL 4 - 2  electrically connecting the second adjacent sensor parts SP 2 _A 12 , SP 2 _A 13 , SP 2 _A 22 , and SP 2 _A 23  are formed using the same material and the same process as the first through third signal wirings SL 1  through SL 3 , the display device  1  can be manufactured without an additional manufacturing process or an additional manufacturing cost. 
       FIGS.  7 A and  7 B  are cross-sectional views illustrating other examples of the input sensing panel taken along the line B-B′ of  FIG.  4 A . In  FIGS.  7 A and  7 B , cross sections of the input sensing panel  200  corresponding to  FIG.  6    are illustrated. 
     Referring to  FIGS.  3 ,  4 A,  4 B,  5 ,  6 , and  7 A , an input sensing panel  200 _ 1  is substantially the same or similar to the input sensing panel  200  described with reference to  FIGS.  3 ,  4 A,  4 B,  5   , and through  6  except for a metal layer  225 , and thus a redundant description will not be repeated. 
     The metal layer  225  may include first metal patterns SL 1 _M, a second metal pattern CL 1 _M, a third metal pattern GRL 1 _M, and a fourth metal pattern GRL_M. The metal layer  225  may include molybdenum, silver, titanium, copper, aluminum, and an alloy of the same. 
     Signal lines SL 1  may include a first transparent conductive layer SL 1 _T and the first metal patterns M disposed directly on the first transparent conductive patterns SL 1 _T. 
     Similarly, a first connection wiring CL 1  may include a second transparent conductive pattern CL 1 _T and the second metal pattern CL 1 _M, and first and second guard wirings GRL 1  and GRL 2  may include third and fourth transparent conductive patterns GRL 1 _T and GRL 2 _T and the third and fourth metal patterns GRL 1 _M and GRL 2 _M. 
     Second sensor parts SP 2  and first connection parts CP 1  (and first sensor parts SP 1 ) may include transparent conductive patterns, but may not include metal patterns. 
     The transparent conductive patterns and the metal patterns may be formed by sequentially forming a preliminary transparent conductive layer and a preliminary metal layer which cover a first conductive layer  220 _ 1  and sequentially patterning the preliminary metal layer and the preliminary conductive layer. 
     In this case, the electrical conductivity of the signal lines SL 1  and the first connection wiring CL 1  can be improved, the drop of a sensing signal can be prevented or reduced, and the sensing sensitivity can be improved. 
     Referring to  FIGS.  7 A and  7 B , an input sensing panel  200 _ 2  is substantially the same or similar to the input sensing panel  200 _ 1  described with reference to  FIG.  7 A  except for a first insulating layer  230 _ 1 , and thus a redundant description will not be repeated. 
     The first insulating layer  230 _ 1  may overlap at least a portion of each of a sensing area IS-DA and a non-sensing area IS-NDA. The first insulating layer  230 _ 1  may generally cover a base layer  210 , and a boundary portion of the base layer  210  may be exposed by the first insulating layer  230 . For example, the first insulating layer  230 _ 1  may not overlap an outermost boundary of the base layer  210  in the non-display area IS-NDA and may not overlap an inner boundary of the base layer  210 , which is closest to a first hole AH 1 , in an adjacent area IS-AA. 
     Contact holes CNT that partially expose second sensor parts SP 2  may be formed in the first insulating layer  230 _ 1 . In this case, a second conductive layer  240  (or second connection parts CP 2 ) may be connected to the second sensor parts SP 2  through the contact holes CNT and may electrically connect the second sensor parts SP 2  to each other. 
       FIGS.  8 A and  8 B  are enlarged views of area A 3  of  FIG.  4 A . That is, enlarged views of the adjacent area IS-AA around the first hole AH 1  are illustrated in  FIGS.  8 A and  8 B . 
     Referring to  FIG.  8 A , the first connection wiring CL 1  may be connected to the (1,2) second adjacent driving sensor part SP 2 _A 12  and the (2,2) second adjacent driving sensor part SP 2 _A 22 . For example, the first connection wiring CL 1  may be formed integrally with the (1,2) second adjacent driving sensor part SP 2 _A 12  and the (2,2) second adjacent driving sensor part SP 2 _A 22 . For another example, when the first connection wiring CL 1  includes the second transparent conductive pattern CL 1 _T and the second metal pattern CL 1 _M as described above with reference to  FIG.  7 A , the second transparent conductive pattern CL 1 _T may be formed integrally with the (1,2) second adjacent driving sensor part SP 2 _A 12  and the (2,2) second adjacent driving sensor part SP 2 _A 22 , and the second metal pattern CL 1 _M may be formed on the second transparent conductive pattern CL T in the adjacent area IS-AA. 
     A first line width D 1  of the first connection wiring CL 1  may be greater than a reference line width D 0  of the second guard wiring GRL 2 . Here, the reference line width D 0  of the second guard wiring GRL 2  may be similar to the line width of the signal wirings SL 1  through SL 4  illustrated in  FIG.  4 A , for example, may be several μm. 
     As the first line width D 1  of the first connection wiring  1  increases, the resistance of a second detection electrode including the first connection wiring CL 1  decreases. This prevents or limits reduction of sensing sensitivity but increases the width of the adjacent area IS-NDA. Therefore, the first line width D 1  of the first connection wiring CL 1  may be 4 to 10 times the reference line width D 0 , for example, may be tens of μm. 
     Like the first connection wiring CL 1 , the second connection wiring CL 2  may be connected to the (1,3) second adjacent driving sensor part SP 2 _A 13  and the (2,3) second adjacent driving sensor part SP 2 _A 23 . 
     A second line width D 2  of the second connection wiring CL 2  may be greater than the reference line width D 0  of the second guard wiring GRL 2 . Like the first connection wiring CL 1 , the second line width D 2  of the second connection wiring CL 2  may be 4 to 10 times the reference line width D 0 , for example, may be tens of μm. 
     In an embodiment, the second line width D 2  of the second connection wiring CL 2  may be different from the first line width D 1  of the first connection wiring CL 1 . 
     For example, as illustrated in  FIG.  8 A , when the length of the second connection wiring CL 2  in the adjacent area IS-AA is smaller than the length of the first connection wiring CL 1 , the second line width D 2  of the second connection wiring CL 2  may be smaller than the first line width D 1  of the first connection wiring CL 1 . That is, the second line width D 2  of the second connection wiring CL 2  may be proportional to the length of the second connection wiring CL 2 . Similarly, the first line width D 1  of the first connection wiring CL 1  may be proportional to the length of the first connection wiring CL 1 . 
     Referring to  FIG.  8 B , a second connection wiring CL 2 _ 1  may pass through a portion of an adjacent area IS-AA in which a first connection wiring CL 1 _ 1  is disposed. In this case, the length of the second connection wiring CL 2 _ 1  may be greater than that of the first connection wiring CL 1 _ 1 , and a fourth line width D 4  of the second connection wiring CL 2 _ 1  may be greater than a third line width D 3  of the first connection wiring CL 1 . 
     In  FIG.  8 B , a gap between the first connection wiring CL 1 _ 1  and the second connection wiring CL 2 _ 1  is smaller than the third line width D 3  of the first connection wiring CL 1 _ 1  (or the fourth line width D 4  of the second connection wiring CL 2 _ 1 ). However, this is merely an example of the third line width D 3  of the first connection wiring CL 1 _ 1  and the line width D 4  of the second connection wiring CL 2 _ 1 , and the present disclosure is not limited to this example. 
       FIG.  9    is an enlarged view of another example of the area A 1  of  FIG.  3   . 
     Referring to  FIGS.  3 ,  4 A, and  9   , an input sensing panel  200  of  FIG.  9    may be substantially the same as the input sensing panel  200  of  FIG.  4 A  except for a (2,1) second adjacent connection part CP 2 _ 21 _ 1 . 
     The (2,1) second adjacent connection part CP 2 _ 21 _ 1  may be located on a first reference boundary line L_REF 1  and located between a first point P 1  and a second point P 2 . Here, the first point P 1  may be a point at which a second horizontal reference line LH 2  corresponding to the (2,1) second adjacent connection part CP 2 _ 21 _ 1  intersects the first reference boundary line L_REF 1 , and the second point P 2  may be a point at which a first vertical reference line LV 1  corresponding to the (2,1) second adjacent connection part CP 2 _ 21 _ 1  intersects the first reference boundary line L_REF 1 . The shapes and sizes of adjacent first sensor parts (e.g., a (1,3) first sensor part SP 1 _A 13  and a (2,1) first sensor part SP 1 _A 21 ) may be determined or varied according to the position of the (2,1) second adjacent connection part CP 2 _ 21 _ 1 . 
       FIG.  10    is a plan view illustrating an example of the display panel included in the display device of  FIG.  2   .  FIG.  11    is a circuit diagram illustrating an example of a pixel included in the display panel of  FIG.  10   .  FIG.  12    is a cross-sectional view illustrating an example of the display panel taken along line C-C′ of  FIG.  10   .  FIG.  13    is an enlarged cross-sectional view of area A 5  of  FIG.  12   .  FIG.  14    illustrates a process of manufacturing the display panel of  FIG.  12   . 
     Referring first to  FIG.  12   , a display panel  100  includes a first substrate BL and a second substrate ENL disposed opposite the first substrate BL. In addition, the display panel  100  includes a circuit element layer DP-CL, a display element layer DP-DL and a capping layer CPL disposed on the first substrate BL. The display panel  100  may further include a first sealing member SEAL (or sealant) and a second sealing member (not illustrated) which seal the first substrate BL and the second substrate ENL. 
     Each of the first substrate BL and the second substrate ENL may include a glass substrate, a metal substrate, or an organic/inorganic composite substrate. However, the base layer BL is not limited to this example, and each of the first substrate BL and the second substrate ENL may also include a synthetic resin film. 
     The element circuit layer DP-CL includes at least one insulating layer and circuit elements. The insulating layer included in the circuit element layer DP-CL will hereinafter be referred to as an intermediate insulating layer. The intermediate insulating layer includes at least one intermediate inorganic layer and at least one intermediate organic layer. The circuit elements include signal lines, driving circuits of pixels, etc. The circuit element layer DP-CL may be formed by forming an insulating layer, a semiconductor layer and a conductive layer through coating, deposition or the like and patterning the insulating layer, the semiconductor layer and the conductive layer through a photolithography process. 
     The display element layer DP-DL includes light emitting elements. The display element layer DP-DL may include organic light emitting diodes. The display element layer DP-DL may further include an organic layer such as a pixel defining layer. 
     The capping layer CPL may output light emitted from the display element layer DP-DL to the outside of the display panel  100 . The capping layer CPL may have a refractive index of 1.6 to 2.4. 
     The first sealing member SEAL may be made of a transparent frit, may overlap an adjacent area DP-AA of the display panel  100 , and may block moisture and oxygen introduced from a second hole AH 2 . Here, the adjacent area DP-AA of the display panel  100  may correspond to the adjacent area IS-AA of the input sensing panel  200  described with reference to  FIG.  3   . The first sealing member SEAL may form a closed loop to surround the second hole AH 2 . 
     Like the first sealing member SEAL, the second sealing member (not illustrated) may be made of a transparent frit, may overlap a non-display area DP NDA of the display panel  100 , and may block moisture and oxygen introduced from the outside. The second sealing member may form a rectangular closed loop to surround a display area DP-DA. 
     In embodiments, an inner side surface of the first substrate BL, an inner side surface of the second substrate ENL and an inner side surface of the first sealing member SEAL which contact the second hole AH 2  may coincide or be aligned with each other. That is, the size (or cross-sectional area) of the second hole AH 2  may be uniform along the third direction DR 3 . 
     For example, the second hole AH 2  may be formed by a hole edge forming process, a sealing process, and a hole processing process. The formation process of the second hole AH 2  will be described with reference to  FIG.  14   . 
     Referring to  FIG.  14   , after the circuit element layer DP-CL, the display element layer DP-DL and the capping layer CPL are formed on the first substrate BL, the display element layer DP-DL (or an organic layer and an inorganic layer included in the display element layer DP-DL) may be removed by laser etching to form a groove GRV 1 . The width of the groove GRV 1  may be greater than that of the first sealing member SEAL. The first sealing member SEAL bonded to the second substrate ENL may be inserted into the groove GRV 1  and then bonded to the first substrate BL. Then, the second hole AH 2  may be formed by laser cutting, CNC drilling, or the like. Since the second hole AH 2  is formed at a time after the sealing process using the first sealing member SEAL, it may have a uniform size (or cross-sectional area) along the third direction DR 3 . 
     Referring to  FIG.  10   , the display panel  100  includes the display area DP-DA and the non-display area DP-NDA in plan view. The non-display area DP-NDA may be defined along edges of the display area DP-DA. The display area DP-DA and the non-display area DP-NDA of the display panel  100  respectively correspond to the display area DA and the non-display area NDA of the display device  1  illustrated in  FIGS.  1  and  2   . 
     The display panel  100  may include a driving circuit GDC, signal lines SGL, signal pads DP-PD (or second pads), and pixels PX. The pixels PX are disposed in the display area DA. Here, each of the pixels PX is a minimum unit that displays an image and includes an organic light emitting diode and a pixel driving circuit connected to the organic light emitting diode. The driving circuit GDC, the signal lines SGL, the signal pads DP-PD and the pixel driving circuits may be included in the element circuit layer DP-CL illustrated in  FIG.  10   . 
     The driving circuit GDC may include a scan driving circuit. The scan driving circuit generates scan signals and sequentially outputs the scan signals to scan lines GL to be described later. The scan driving circuit may further output another control signal to the driving circuits of the pixels PX. 
     The scan driving circuit may include a plurality of thin-film transistors formed by the same process as the driving circuits of the pixels PX, for example, a low-temperature polycrystalline silicon (LTPS) process or a low-temperature polycrystalline oxide (LTPO) process. 
     The signal lines SGL include the scan lines GL, data lines DL, a power supply line PL, and a control signal line CSL. The scan lines GL are connected to corresponding pixels PX, respectively, and the data lines DL are connected to corresponding pixels PX, respectively. The power supply 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 overlap the display area DP-DA and the non-display area DP-NDA. The signal lines SGL may be connected to a pad area NDA-PD (i.e., an area where the signal pads DP-PA are disposed) disposed in the non-display area DP-NDA and may also be connected to the pixels PX. 
     Each of the signal lines SGL is connected to transistors T 1  and T 2  of a pixel PX. The signal lines SGL may have a single layer or multilayer structure and may be formed as a single body or may include two or more parts. The two or more parts may be disposed on different layers and may be connected to each other through a contact hole penetrating an insulating layer disposed between the two or more parts. 
     The display panel  100  may include the second hole AH 2  corresponding to the hole AH of the display device  1  (or the first hole AH 1  of the input sensing panel  200 ). 
     Like the input sensing panel  200  described with reference to  FIG.  4 A , the adjacent area DP-AA (see  FIG.  12   ) may be defined adjacent to the second hole AH 2 , the pixels PX may not be disposed in the adjacent area DP-AA, and the signal lines SGL connected to adjacent rows and columns (i.e., pixel rows and pixel columns interfering with the second hole AH 2 ) may bypass the second hole AH 2  in the adjacent area. Since the signal lines SGL bypass the second hole AH 2  in substantially the same or similar manner to the connection wirings CL 1  and CL 2  described with reference to  FIG.  4 A , a redundant description will not be repeated. 
     A circuit board (not illustrated) may be electrically connected to the pad area NDA-PD. The circuit board may be a rigid circuit board or a flexible circuit board. The circuit board may be directly coupled to the pad area NDA-PD or may be connected to the pad area NDA-PD by another circuit board. 
     Referring to  FIG.  11   , an organic light emitting diode OLED may be a top emission diode or a bottom emission diode. A pixel PX includes a first transistor T 1  (or a switching transistor), a second transistor T 2  (or a driving transistor), and a capacitor Cst as a pixel driving circuit for driving the organic light emitting diode OLED. 
     A first power supply voltage ELVDD is provided to the second transistor T 2 , and a second power supply voltage ELVSS is provided to the organic light emitting diode OLED. The second power supply voltage ELVSS may be lower than the first power supply voltage ELVDD. 
     The first transistor T 1  outputs a data signal transmitted to a data line DL in response to a scan signal transmitted to a scan line GL. The capacitor Cst is charged with a voltage corresponding to the data signal received from the first transistor T 1 . The second transistor T 2  is connected to the organic light emitting diode OLED. The second transistor T 2  controls a driving current flowing through the organic light emitting diode OLED according to the amount of charge stored in the capacitor Cst. 
     This equivalent circuit is merely an embodiment, and the pixel PX is not limited to this embodiment. For example, the pixel PX may include more transistors and more capacitors. The organic light emitting diode OLED can also be connected between the power supply line PL and the second transistor T 2 . 
     Referring to  FIG.  13   , the circuit element layer DP-CL, the display element layer DP-DL, and the capping layer CPL are sequentially disposed on the first substrate BL. 
     The element circuit layer DP-CL may include a buffer layer  105  which is an inorganic layer, a first intermediate inorganic layer  110  and a second intermediate inorganic layer  120  and may include an intermediate organic layer  130  which is an organic layer. The materials of the inorganic and organic layers are not particularly limited, and the buffer layer  105  can be optionally placed or omitted. 
     A semiconductor pattern OSP 1  (hereinafter, referred to as a first semiconductor pattern) of the first transistor T 1  and a semiconductor pattern OSP 2  (hereinafter, referred to as a second semiconductor pattern) of the second transistor T 2  are disposed on the buffer layer  105 . The first semiconductor pattern OSP 1  and the second semiconductor pattern OSP 2  may be selected from amorphous silicon, polysilicon, and a metal oxide semiconductor. 
     The first intermediate inorganic layer  110  is disposed on the first semiconductor pattern OSP 1  and the second semiconductor pattern OSP 2 . A control electrode GE 1  (hereinafter, referred to as a first control electrode) of the first transistor T 1  and a control electrode GE 2  (hereinafter, referred to as a second control electrode) of the second transistor T 2  are disposed on the first intermediate inorganic layer  110 . The first control electrode GE 1  and the second control electrode GE 2  may be manufactured by the same photolithography process as the scan lines GL. 
     In addition, the scan lines GL bypassing the second hole AH 2  (or a hole area DP-OA corresponding to the second hole AH 2 ) may be disposed on the first intermediate inorganic layer  100  in the adjacent area DP-AA of the display panel  100 . 
     The second intermediate inorganic layer  120  covering the first control electrode GE 1  and the second control electrode GE 2  is disposed on the first intermediate inorganic layer  110 . An input electrode DE 1  (hereinafter, referred to as a first input electrode) and an output electrode SE 1  (hereinafter, referred to as a first output electrode) of the first transistor T 1  and an input electrode DE 2  (hereinafter, referred to as a second input electrode) and an output electrode SE 2  (hereinafter, referred to as a second output electrode) of the second transistor T 2  are disposed on the second intermediate inorganic layer  120 . 
     The first input electrode DE 1  and the first output electrode SE 1  are connected to the first semiconductor pattern OSP 1  respectively through a first through hole CH 1  and a second through hole CH 2  penetrating the first intermediate inorganic layer  110  and the second intermediate inorganic layer  120 . The second input electrode DE 2  and the second output electrode SE 2  are connected to the second semiconductor pattern OSP 2  respectively through a third through hole CH 3  and a fourth through hole CH 4  penetrating the first intermediate inorganic layer  110  and the second intermediate inorganic layer  120 . One of the first transistor T 1  and the second transistor T 2  can be modified to a bottom gate structure. 
     In addition, the data lines DL bypassing the second hole AH 2  may be disposed on the second intermediate inorganic layer  120  in the adjacent area DP-AA of the display panel  100 . 
     The intermediate organic layer  130  covering the first input electrode DE 1 , the second input electrode DE 2 , the first output electrode SE 1  and the second output electrode SE 2  is disposed on the intermediate organic layer  130 . The intermediate organic layer may provide a flat surface. 
     The display element layer DP-DL is disposed on the intermediate organic layer  130 . The display element layer DP-DL may include a pixel defining layer PDL and the organic light emitting diode OLED. The pixel defining layer PDL may include an organic material. A first electrode AE is disposed on the intermediate organic layer  130 . The first electrode AE is connected to the second output electrode SE 2  through a fifth through hole CH 5  penetrating the intermediate organic layer  130 . 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. In an embodiment of the present disclosure, the pixel defining layer PDL may be omitted. 
     The pixels PX may be disposed in the display area DP-DA. The display area DP-DA may include a light emitting region PXA and a non-light emitting region NPXA adjacent to the light emitting region PXA. The non-light emitting region NPXA may surround the light emitting region PXA. The light emitting region PXA is defined to correspond to a portion of the first electrode AE exposed through the opening OP. 
     The light emitting region PXA may overlap at least one of the first and second transistors T 1  and T 2 . The opening OP can become wider, and the first electrode AE and a light emitting layer EML to be described later can also become wider. 
     A hole control layer HCL may be disposed common to the light emitting region PXA and the non-light emitting region NPXA. Although not illustrated separately, a common layer such as the hole control layer HCL may be formed common to the pixels PX. 
     The light emitting layer EML is disposed on the hole control layer HCL. The light emitting layer EML may be disposed in an area corresponding to the opening OP. That is, the light emitting layer EML may be formed separately in each of the pixels PX. The light emitting layer EML may include an organic material and/or an inorganic material. The light emitting layer EML may generate light of a predetermined color. 
     In  FIG.  13   , the patterned light emitting layer EML is illustrated as an example. However, the light emitting layer EML may also be disposed common to the pixels PX. Here, the light emitting layer EML may generate white light. In addition, the light emitting layer EML may also have a multilayer structure called a tandem. 
     An electron control layer ECL is disposed on the light emitting layer EML. Although not illustrated separately, the electron control layer ECL may be formed common to the pixels PX. A second electrode CE is disposed on the electron control layer ECL. The second electrode CE is disposed common to the pixels PX. 
     A capping layer may be disposed on the second electrode CE. 
     As described with reference to  FIGS.  10 ,  11 ,  12 ,  13 , and  14   , the display panel  100  may include the second hole AH 2  corresponding to the hole AH of the display device  1 , the pixels PX may not be disposed in the adjacent area DP-AA adjacent to the second hole AH 2 , and the signal lines SGL (e.g., the scan lines GL and the data lines DL) interfering with the second hole AH 2  may bypass the second hole AH 2  in the adjacent area DP-AA. 
       FIG.  15    is an enlarged plan view of area A 4  of  FIG.  10   . In  FIG.  15   , the connection wirings CP 1  and CP 2  included in the input sensing panel  200  of  FIG.  3    overlap the data lines DL included in the display panel  100  of  FIG.  10   .  FIG.  16    is a cross-sectional view illustrating an example of the display device taken along line D-D′ of  FIG.  15   . 
     Referring first to  FIGS.  15  and  16   , the input sensing panel  200  is disposed on the display panel  100 . The input sensing panel  200  may be substantially the same as the input sensing panel  200  described with reference to  FIG.  7 A , and the display panel  100  may be substantially the same as the display panel  100  described with reference to  FIGS.  12  and  13   . Thus, a redundant description will not be repeated. 
     The data lines DL may include first data lines DL 1  and second data lines DL 2 . The first data lines DL 1  may bypass the hole AH (or the second hole AH 2 ) in the direction of one side of the center of the area of the hole AH or may pass through the adjacent area AA. The first data lines DL 1  may include first through i th  first data lines DL 1 _ 1  through DL 1 _ i  (where i is a positive integer). 
     Similarly, the second data lines DL 2  may bypass the hole AH (or the second hole AH 2 ) in the direction of the other side of the center of the area of the hole AH or may pass through the adjacent area AA. The second data lines DL 2  may include first through (j) th  second data lines DL 2 _ 1  through DL 2  (where j is a positive integer). 
     In this case, the first connection wiring CL 1  may overlap at least one of the first data lines DL 1 , and the second connection wiring CL 2  may overlap at least one of the second data lines DL 2 . As described above, each of the first line width D 1  of the first connection wiring CL 1  and the second line width D 2  of the second connection wiring CL 2  is greater than the line width of the first data lines DL 1  (and/or the line width of the second data lines DL 2 ). Therefore, each of the first connection wiring CL 1  and the second connection wiring CL 2  may overlap a plurality of data lines. 
     Referring to  FIG.  16   , the first connection wiring CL 1  and the second connection wiring CL 2  may overlap the sealing member SEAL. Each of the first connection wiring CL 1  and the second connection wiring CL 2  may also partially overlap the sealing member SEAL. 
     Referring to  FIG.  16   , the data lines DL may not overlap the second guard wiring GRL 2 . Here, the data lines DL may include the first data lines DL 1  and the second data lines DL 2 . If the second guard wiring GRL 2  is in a floating state or overlaps the data lines DL, parasitic capacitance may be formed between the second guard wiring GRL 2  and the data lines DL, and signal transmission through the data lines DL may be delayed. Therefore, the second guard wiring GRL 2  and the data lines DL may not overlap each other in order to prevent or reduce a delay in signal transmission through the data lines DL. 
       FIG.  17    is a cross-sectional view illustrating another example of the display panel taken along the line C-C′ of  FIG.  10   .  FIGS.  18 A,  18 B, and  18 C  are enlarged cross-sectional views of area A 5  of  FIG.  17   . 
     Referring to  FIGS.  10 ,  12 ,  13 , and  17   , a display panel  100  is different from the display panel  100  described with reference to  FIGS.  12  and  13    in that it includes a thin-film encapsulation layer TFE instead of a second substrate ENL, a sealing member SEAL and a capping layer CPL. 
     The display panel  100  includes a base layer BL (or a second base layer) and a circuit element layer DL-CP, a display element layer DP-DL and the thin-film encapsulation layer TFE disposed on the base layer BL. 
     The base layer BL may include a synthetic resin film. A synthetic resin layer is formed on a working substrate used to manufacture the display panel  100 . Then, a conductive layer and an insulating layer are formed on the synthetic resin layer. If the working substrate is removed, the synthetic resin layer corresponds to the base layer BL. The synthetic resin layer may be a polyimide resin layer, and its material is not particularly limited. The base layer BL may include a glass substrate, a metal substrate, or an organic/inorganic composite substrate. 
     The circuit element layer DP-CL and the display element layer DP-DL may respectively be substantially the same or similar to the circuit element layer DP-CL and the display element layer DP-DL described above with reference to  FIG.  12   . Thus, a redundant description will not be repeated. 
     The thin-film encapsulation layer TFE seals the display element layer DP-DL. The thin-film encapsulation layer TFE includes at least one insulating layer. The thin-film encapsulation layer TFE may include at least one inorganic layer (hereinafter, referred to as an encapsulating inorganic layer). The thin-film encapsulation layer TFE according to an embodiment of the present disclosure may include at least one organic layer (hereinafter, referred to as an encapsulating organic layer) and at least one encapsulating inorganic layer. The encapsulating inorganic layer may protect the display element layer DP-DL from moisture/oxygen. 
     The display panel  100  may include dams DAM 1  and DAM 2  formed in an adjacent area DP-AA. 
     The dams DAM 1  and DAM 2  may be formed on the base layer BL along the periphery of a second hole AH 2 . The dams DAM 1  and DAM 2  may include a first dam DAM 1  and a second dam DAM 2 . The first dam DAM 1  may be formed adjacent to the second hole AH 2 . That is, a side surface of the first dam DAM 1  may coincide or be aligned with an inner side surface of the display panel  100  (i.e., a side surface formed by the second hole AH 2 ). The second dam DAM 2  may be spaced apart from the first dam DAM 1 . The dams DAM 1  and DAM 2  may block introduction of oxygen and moisture from the second hole AH 2  and propagation of fine cracks. 
     Referring to  FIG.  18 A , the base layer BL may include a first sub-base layer SUB 1  (or a support substrate), a first barrier layer BA 1 , a second sub-base layer SUB 2  (or a flexible substrate), and a second barrier layer BA 2 . The first barrier layer BA 1  may be disposed on the first sub-base layer SUB 1 , the second sub-base layer SUB 2  may be disposed on the first barrier layer BA 1 , and the second barrier layer BA 2  may be disposed on the second sub-base layer SUB 2 . Each of the first and second sub-base layers SUB 1  and SUB 2  may include a polymer material (e.g., PI) having flexibility. The first and second barrier layers BA 1  and BA 2  may prevent or suppress oxygen and moisture from being introduced from the outside to the first and second sub-base layers SUB 1  and SUB 2 . 
     The second sub-base layer SUB 2  may include negative PI. In this case, inversely tapered grooves GRV 1  and GRV 2  may be formed in the second sub-base layer SUB 2  through patterning. That is, protruding tips TIP may be formed in the grooves GRV 1  and GRV 2 . The inversely tapered grooves GRV 1  and GRV 2  (and the tips TIP) may cause an organic layer (or an organic light emitting layer) to be discontinuously formed in a stacking process of the display panel  100 . 
     The circuit element layer DP-CL is different from the circuit element layer DP-CL described with reference to  FIG.  13    in that it further includes a third intermediate inorganic layer  125 . Although the circuit element layer DP-CL includes only a second transistor T 2  in  FIG.  18 A , this is only a schematic illustration of the circuit element layer DP-CL for ease of description, and the circuit element layer DP-CL may further include the first transistor T 1 , etc. illustrated in  FIG.  13   . 
     The third intermediate inorganic layer  125  may be disposed between a second intermediate inorganic layer  120  and an intermediate organic layer  130 . The third intermediate inorganic layer  125  may be substantially the same or similar to the second intermediate inorganic layer  120 . Data lines DL (or scan lines GL) may be formed on the third intermediate inorganic layer  125 , but the present disclosure is not limited to this case. At least some of the data lines DL (or the scan lines GL) can also be formed on the second intermediate inorganic layer  120 . When the data lines DL (or the scan lines GL) are disposed on a first intermediate inorganic layer  110 , the second intermediate inorganic layer  120  and the third intermediate inorganic layer  130  in a distributed manner, the width of a first non-display area DP-NDA 1  may be reduced. Here, the first non-display area DP-NDA 1  may be a portion of an adjacent area D-AA excluding the first and second dams DAM 1  and DAM 2  and the first and second grooves GRV 1  and GRV 2 . 
     The dams DAM 1  and DAM 2  may include the circuit element layer DP-CL. However, the intermediate organic layer  130  may not be formed in the dams DAM 1  and DAM 2 . 
     The thin-film encapsulation layer TFE may overlap the whole of the base layer BL. The thin-film encapsulation layer TFE may extend from a display area DP-DA to the second hole AH 2  and may be disposed along the first and second grooves GRV 1  and GRV 2  and sidewalls formed by the first and second dams DAM 1  and DAM 2 . In this case, the inflow path of moisture and oxygen and/or propagation path of cracks through the thin-film encapsulation layer TFE are increased, and the reliability and stability of the display device  1  can be improved. 
     The thin-film encapsulation layer TFE may include a first encapsulating inorganic layer IOL 1 , a first encapsulating organic layer OL 1 , and a second encapsulating inorganic layer IOL 2  stacked sequentially. Each of the first encapsulating inorganic layer IOL 1  and the second encapsulating inorganic layer IOL 2  may be a single layer including a material or may have multiple layers including different materials. At least one of the first encapsulating inorganic layer IOL 1  and the second encapsulating inorganic layer IOL 2  may include a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer. 
     The encapsulating organic layer OL 1  may be formed by depositing organic monomers. Here, the organic monomers may include, but are not limited to, acrylic monomers. 
     For example, the thin-film encapsulation layer TFE may include a silicon oxynitride layer/an organic monomer layer/a silicon nitride layer stacked sequentially on a second electrode CE. Another inorganic layer may be disposed on the silicon nitride layer, and the silicon nitride layer may have multiple layers (e.g., two layers) deposited under different conditions. 
     In embodiments, the encapsulating organic layer OL 1  may overlap the display area DP-DA and the first non-display area DP-NDA 1  and may not overlap the first and second grooves GRV 1  and GRV 2  and the first and second dams DAM 1  and DAM 2 . In this case, the first and second encapsulating inorganic layers IOL 1  and IOL 2  may overlap the first and second grooves GRV 1  and GRV 2  and the first and second dams DAM 1  and DAM 2 . In this case, the inflow path of moisture and oxygen may be relatively long. 
     However, the above is merely an example, and the thin-film encapsulation layer TFE is not limited to this example. 
     The encapsulating organic layer OL 1  may also overlap the second groove GRV 2  and partially overlap the second dam DAM 2  as illustrated in  FIG.  18 B . In addition, the encapsulating organic layer OL 1  may also overlap the first and second grooves GRV 3  and the second dam DAM 1  and partially overlap the first dam DAM 1  as illustrated in  FIG.  18 C . In this case, an upper surface of the thin-film encapsulation layer TFE may be relatively flat, and an input sensing layer to be described later (i.e., an input sensing layer formed through a continuous process after the process of forming the thin-film encapsulation layer TFE) can be formed more easily on the thin-film encapsulation layer TFE. 
     In  FIGS.  17 ,  18 A,  18 B, and  18 C , the display panel  100  includes two dams DAM 1  and DAM 2 . However, this is merely an example, and the present disclosure is not limited to this example. For example, the display panel  100  may include three or more dams. 
       FIGS.  19 A,  19 B,  19 C, and  19 D  are plan views illustrating examples of the display panel of  FIG.  17   . In  FIGS.  19 A,  19 B,  19 C, and  19 D , a display panel  100  (or dams DAM 1  and DAM 2  of the display panel  100 ) overlaps an input sensing panel  200  (or first and second connection wirings CL 1  and CL 2  of the input sensing panel  200 ) in the area A 4  of  FIG.  10   . 
     Referring to  FIG.  19 A , a first connection wiring CL 1  may overlap a second dam DAM 2 . A first line width D 1  of the first connection wiring CL 1  may be smaller than a second width D 2  of the second dam DAM 2  (i.e., a gap between first and second grooves GRV 1  and GRV 2 ). For example, if the display panel  100  has the cross-sectional structure illustrated in  FIG.  18 A  and the second width D 2  of the second dam DAM 2  is sufficiently large, the first connection wiring CL 1  may overlap the second dam DAM 2 . The first connection wiring CL 1  may overlap a first non-display area DP-NDA 1  as illustrated in  FIG.  19 D . In this case, the first connection wiring CL 1  may overlap a data wiring DL and/or a scan signal line GL of the display panel  100 . In addition, although not illustrated, the first connection wiring CL 1  may overlap a first dam DAM 1 . 
     Referring to  FIG.  19 B , a first connection wiring CL 1  may cover a second dam DAM 2 . A first line width D 1 _ 1  of the first connection wiring CL 1  may be greater than a second width D 2 _ 2  of the second dam DAM 2  (i.e., a gap between first and second grooves GRV 1  and GRV 2 ). For example, if the display panel  100  has the structure illustrated in  FIG.  18 B  or the cross-sectional structure illustrated in  FIG.  18 C  and the second width D 2  of the second dam DAM 2  is relatively small, the first connection wiring CL 1  may cover the second dam DAM 2 . 
     Referring to  FIG.  19 C , a first connection wiring CL 1  may partially overlap a second dam DAM 2 . 
       FIG.  20    is a cross-sectional view illustrating another example of the display device taken along the line A-A′ of  FIG.  1   .  FIG.  21    is a cross-sectional view illustrating an example of an input sensing panel included in the display device of  FIG.  20   .  FIG.  22    illustrates another example of the display device taken along the line A-A′ of  FIG.  1   . 
     Referring to  FIGS.  2  and  20   , a display device  1 _ 1  is different from the display device  1  of  FIG.  2    in that it includes an antireflection panel  300  disposed on a display panel  100  and an input sensing panel  200  disposed on the antireflection panel  300 . That is, the stacking order of the input sensing panel  200  and the antireflection panel  300  included in the display device  1 _ 1  is different from that of the input sensing panel  200  and the antireflection panel  300  included in the display device  1  of  FIG.  2   . 
     The display panel  100  may be substantially the same as the display panel  100  described with reference to  FIGS.  2 ,  10 ,  11 ,  12 ,  13 ,  14 , and  17   . Therefore, a redundant description will not be repeated. The antireflection panel  300  and a window panel  400  may be substantially the same or similar to the antireflection panel  300  and the window panel  400  described with reference to  FIGS.  2 A and  2 B . 
     The input sensing panel  200  is different from the input sensing panel  200  described with reference to  FIGS.  3  through  6    in that it includes a conductive layer IS-CP (or a first connection wiring CL 1 ), first signal lines SL 1 , and first and second guard wirings GRL 1  and GRL 2 . The plan view of the input sensing panel  200  may be substantially the same as the plan view illustrated  FIG.  3   . In  FIG.  21   , a cross section of the input sensing panel  200  taken along the line B-B′ of  FIG.  3    is illustrated. 
     Referring to  FIG.  21   , the input sensing panel  200  is different from the input sensing panel  200  of  FIG.  5    in that it does not include a second insulating layer  250  and includes a third conductive layer  260 . A first insulating layer  230  included in the input sensing panel  200  may include only insulating patterns IS-ILP, and the insulating patterns IS-ILP may be disposed on a first conductive layer  220  and may be disposed only in overlap areas between first connection parts CP 1  and second connection parts CP 2 . 
     The third conductive layer  260  may be disposed on a base layer  210  in a non-sensing area IS-NDA and an adjacent area IS-AA and may include the first connection wiring CP 1 , the first signal lines SL 1  and the first and second guard wirings GRL 1  and GRL 2 . 
     The third conductive layer  260  may include a metal layer, and the metal layer may include may include molybdenum, silver, titanium, copper, aluminum, and an alloy of the same. Since the third conductive layer  260  includes only the metal layer, it has lower resistance than a transparent conductive layer of the same thickness as the third conductive layer  260  and can reduce the delay and attenuation of a signal transmitted through the first connection wiring CP 1 , the first signal lines SL 1  and the first and second guard wirings GRL 1  and GRL 2 . 
     Referring again to  FIG.  20   , the third conductive layer  260  may be disposed on an upper surface of the base layer  210  and may face the window panel  400 . However, the input sensing panel  200  is not limited to this example. 
     Referring to  FIG.  22   , a conductive layer IS-CP (or a third conductive layer  260 ) may be disposed on a lower surface of a base layer  210  and may face an antireflection panel  300 . The stress due to the bending of a display device  1  may be alleviated depending on the position of the third conductive layer IS-CP (or the third conductive layer  260 ). 
     The overlapping relationship between the first connection wiring CL 1  included in the input sensing panel  200  of  FIGS.  20 ,  21 , and  22    and signal wirings (e.g., data wirings) and/or data wirings included in the display panel  100  may be substantially the same or similar to the overlapping relationship described with reference to  FIGS.  15 ,  16 , and  19 A through  19 D . 
       FIG.  23    is a perspective view of a display device according to another embodiment.  FIG.  24    illustrates another example of an input sensing panel included in the display device of  FIG.  23   . In  FIG.  24   , an enlarged view of a portion of the input sensing panel  200  corresponding to  FIG.  4 A  (i.e., a portion corresponding to the area A 1  of  FIG.  4 A ) is illustrated. 
     Referring to  FIGS.  1 ,  3 ,  4 A,  23 , and  24   , an input sensing panel  200 _ 1  is different from the input sensing panel  200  of  FIG.  4 A  (or the input sensing panel  200  of  FIG.  3   ) in that it includes two active holes AH 1 _ 1  and AH 1 _ 2 . 
     First and second active holes AH 1 _ 1  and AH 1 _ 2  may be formed at a position corresponding to the first hole AH 1  described with reference to  FIG.  4 A . 
     Each of the first and second active holes AH 1 _ 1  and AH 1 _ 2  may have a circular planar shape and may have a size similar to the size of sensor parts SP 1  and SP 2 . However, this is merely an example, and the first and second active holes AH 1 _ 1  and AH 1 _ 2  are not limited to this example. For example, the first and second active holes AH 1 _ 1  and AH 1 _ 2  may have a polygonal shape such as a square or a rectangle or may have a size equal to or larger than the size of the first hole AH 1 . 
     First, the first active hole AH 1 _ 1  may overlap a first vertical reference line LV 1  (i.e., one of the imaginary lines extending in the first direction DR 1 , on which second connection parts CP 2  or first connection parts CP 1  are located or which connect the second connection parts CP 2  or the first connection parts CP 1 ) and a second horizontal reference line LH 2  (i.e., one of the imaginary lines extending in the second direction DR 2 , on which the second connection parts CP 2  or the first connection parts CP 1  are located). That is, a first intersection point of the first vertical reference line LV 1  and the second horizontal reference line LH 2  may be disposed within the first active hole AH 1 _ 1  or adjacent to the first active hole AH 1 _ 1 . 
     Accordingly, a 221 st  adjacent connection part CP 2 _ 21  corresponding to the first intersection point (or a first connection part CP 1  overlapping the 221 st  adjacent connection part CP 2 _ 21 , although not illustrated) may be disposed at an intersection point of the first vertical reference line LV 1  and a first sub-boundary line L_REF 1 _ 1 . Here, the first sub-boundary line L_REF 1 _ 1  may be a closed loop line spaced apart from an edge of the first active hole AH 1 _ 1  by a specific distance, like the first reference boundary line L_REF 1  described with reference to  FIG.  4 A . 
     Adjacent sensor parts (e.g., a 121 st  sensor part SP 1 _B 21 , a 122 nd  sensor part SP 1 _B 22 , a 211 th  sensor part SP 2 _B 11  and a 231 st  sensor part SP 2 _B 31 ) may have different shapes and/or sizes from first reference sensor parts CP 1 _R (and/or second reference sensor parts CP 2 _R) depending on the position of the 221 st  adjacent connection part CP 2 _ 21 . 
     The 121 st  sensor part SP 1 _B 21  and the 122 nd  sensor part SP 1 _B 22  may be directly connected to each other depending on the position of the 221 st  adjacent connection part CP 2 _ 21 . 
     Since adjacent second sensor parts (e.g., the 211 th  sensor part SP 2 _B 11  and a 212 th  sensor part SP 2 _B 12 ) are not separated by the first active hole AH 1 _ 1 , no connection wiring may be disposed in a first adjacent area (i.e., an adjacent area surrounding the first active hole AH 1 _ 1 ). A second sub-guard wiring GRL 2 _ 1  may be disposed in the first adjacent area in order to prevent or reduce inflow of physical shock, static electricity, etc. from the first active hole AH 1 _ 1 . 
     Like the first active hole AH 1 _ 1 , the second active hole AH 1 _ 2  may overlap a third vertical reference line LV 3 , a first horizontal reference line LH 1  and the second horizontal reference line LH 2 . That is, a second intersection point of the third vertical reference line LV 3  and the first horizontal reference line LH 1  may be disposed within the second active hole AH 1 _ 2  or adjacent to the second active hole AH 1 _ 2 , and a third intersection point of the third vertical reference line LV 3  and the second horizontal reference line LH 2  may be disposed within the second active hole AH 1 _ 2  or adjacent to the second active hole AH 1 _ 2 . 
     Accordingly, a 213 th  adjacent connection part CP 2 _ 13  corresponding to the second intersection point may be disposed at one of the intersection points of the third vertical reference line LV 3  and a second sub-boundary line L_REF 1 _ 2 . Similarly, a 222 nd  adjacent connection part CP 2 _ 22  corresponding to the third intersection point may be disposed at another one of the intersection points of the third vertical reference line LV 3  and the second sub-boundary line L_REF 1 _ 2 . 
     Therefore, a 112 th  sensor part SP 1 _B 12  and a 113 th  sensor part SP 1 _B 13  may be directly connected to each other by the 213 th  adjacent connection part CP 2 _ 13 , and a 123 rd  sensor part SP 1 _B 23  and a 124 th  sensor part SP 1 _B 24  may be directly connected to each other by the 222 nd  adjacent connection part CP 2 _ 22 . 
     Adjacent second sensor parts (e.g., a 213 th  sensor part SP 2 _B 13  and a 223 rd  sensor part SP 2 _B 23 ) may be separated by the second active hole AH 1 _ 2 . Therefore, a third connection wiring CL 3  may be disposed in an adjacent area surrounding the second active hole AH 1 _ 2  and may electrically connect the 213 th  sensor part SP 2 _B 13  and the 223 rd  sensor part SP 2 _B 23 . 
     The third connection wiring CL 3  is substantially the same or similar to one of the first and second connection wirings CL 1  and CL 2  described with reference to  FIG.  4 A , and thus a redundant description will not be repeated. 
     As described with reference to  FIGS.  23  and  24   , even if the shape, size and number (or quantity) of the hole AH of the display device  1  is changed, connection parts interfering with the hole AH (i.e., the first and second connection parts CP 1  and CP 2 ) may be disposed on the sub-boundary lines L_REFR 1 _ 1  and L_REF 1 _ 2  set based on the hole AH, and the sensor parts SP 1  and SP 2  may be disposed accordingly. In addition, a connection wiring (e.g., the third connection wiring CL 3 ) electrically connecting separated second sensor parts SP 2  may be disposed in an adjacent area IS-AA adjacent to the hole AH (e.g., the second active hole AH 1 _ 2 ). Therefore, while the display device  1  includes the hole AH in a display area DA, it can sense an external input (e.g., a user&#39;s touch input) through the entire display area DA surrounding the hole AH. 
       FIG.  25    is a cross-sectional view illustrating another example of the display device taken along the line A-A′ of  FIG.  1   .  FIG.  26    is a plan view of a portion of an input sensing layer included in the display device of  FIG.  25   .  FIGS.  27 A and  27 B  are cross-sectional views illustrating examples of the input sensing layer included in the display device of  FIG.  25   .  FIG.  28    is a plan view of a portion of a first conductive layer included in  FIG.  27 A .  FIG.  29    is an enlarged view of area A 7  of  FIG.  28   .  FIG.  30    is a plan view of a portion of a second conductive layer included in  FIG.  27 A .  FIG.  31    is an enlarged view of area A 7  of  FIG.  30   .  FIG.  32    is an enlarged view of area A 6  of  FIG.  26   .  FIG.  33    is a cross-sectional view illustrating an example of the input sensing layer taken along line D-D′ of  FIG.  31   . 
     First, referring to  FIGS.  1 ,  2 , and  25   , a display device  1 _ 4  is different from the display device  1  of  FIG.  2    in that it includes a display module  10  (or a display panel) and that the display module  10  includes a display panel  100   a  and an input sensing layer  200   a . The display device  1 _ 4  is substantially the same or similar to the display device  1  of  FIG.  2    except for the input sensing layer  200   a , and thus a redundant description will not be repeated. Elements corresponding to reference numerals identical or similar to the above-described reference numerals are substantially the same as the above-described elements, and thus a redundant description will not be repeated. 
     The input sensing layer  200   a  may be directly disposed on the display panel  100   a . As described above, when the input sensing layer  200   a  is directly disposed on the display panel  100   a , it means that no adhesive layer/adhesive member is disposed between the input sensing layer  200   a  and the display panel  100   a . That is, after the formation of the display panel  100   a , the input sensing layer  200   a  may be formed on the display panel  100   a  (e.g., a thin-film encapsulation layer TFE of the display panel  100   a ) through a continuous process. 
     An antireflection panel  300  may be attached onto the display module  10  by an optically clear adhesive member OCA. 
     Referring to  FIGS.  26 ,  27 A,  27 B,  28 ,  29 ,  30 , and  31   , the input sensing layer  200   a  includes a first input sensing layer  200   a - 1  disposed on the display panel  100   a  and a second input sensing layer  200   a - 2  disposed on the first input sensing layer  200   a - 1 . In  FIG.  27 A , a cross-section of the input sensing layer  200   a  corresponding to  FIG.  5    is illustrated. In  FIG.  28   , the first input sensing layer  200   a - 1  corresponding to  FIG.  4 B  is illustrated. In  FIG.  30   , the second input sensing layer  200   a - 2  corresponding to  FIG.  4 C  is illustrated. 
     Referring to  FIG.  28   , the first input sensing layer  200   a - 1  may include second connection parts CP 2 . In addition, the first input sensing layer  200   a - 1  may include first signal lines SL 1 , a first connection wiring CL 1 , and first and second guard wirings GRL 1  and GRL 2 . 
     Referring to  FIG.  29   , a first connection part CP 1  may be a metal mesh pattern. A first signal line SL 1  may be a wiring having a specific line width. However, the present disclosure is not limited to this case. When the first signal line SL 1  overlaps a sensing area IS-DA, a portion of the first signal line SL 1  which overlaps the sensing area IS-DA may have a metal mesh pattern. Similarly, the first connection wiring CL 1  may be a wiring having a specific line width. However, the present disclosure is not limited to this case. Like the first signal line SL 1 , the first connection wiring CL 1  may also have a metal mesh pattern in a portion. 
     Although the line width of the first connection wiring CL 1  (i.e., the width in an adjacent area IS-AA) is similar to the line width of the first signal line SL 1  (i.e., the line width in a non-sensing area IS-NDA), the present disclosure is not limited to this case. As described above, the line width of the first connection wiring CL 1  may be 4 to 10 times the line width of the first signal line SL 1 . 
     Referring to  FIG.  27 A , a first insulating layer  230  may be disposed on the first input sensing layer  200   a - 1  and may cover first connection parts CP 1 . Referring to  FIG.  28   , at least one contact hole CNT-D 1 , CNT-D 2 , CNT-D 3  or CNT-D 4  may be formed in each of the areas of the first insulating layer  230  which overlap both ends of the first connection part CP 1 , an end of the first connection wiring CL 1 , and an end of the first signal wiring SL 1 . 
     Referring to  FIGS.  27 A and  30   , the second input sensing layer  200   a - 2  may include first sensor parts SP 1 , second sensor parts SP 2 , and first connection parts CP 1 . 
     The shape and size of the first sensor parts SP 1  and the shape and size of the second sensor parts SP 2  are substantially the same as the shape and size of the first sensor parts SP 1  and the shape and size of the second sensor parts SP 2  described with reference to  FIG.  4 A , and thus a redundant description will not be repeated. 
     The second sensor parts SP 2  may be connected to the second connection parts CP 2  through first contact holes CNT-D 1  (or third contact holes CNT-D 3 ). The second sensor parts SP 2  may be connected to the first signal wirings SL 1  through second contact holes CNT-D 2  or may be electrically connected to the first connection wiring CL 1  through fourth contact holes CNT-D 4 . 
     In embodiments, the first signal lines SL 1 , the first connection wiring CL 1  and the first and second guard wirings GRL 1  and GRL 2  may be disposed in at least one of the first input sensing layer  200   a - 1  and the second input sensing layer  200   a - 2 . 
     For example, referring to  FIG.  27 B , the first signal lines SL 1 , the first connection wiring CL 1  and the first and second guard wirings GRL 1  and GRL 2  may be disposed in each of the first input sensing layer  200   a - 1  and the second input sensing layer  200   a - 2  and may be connected to corresponding elements through connection contact holes CNT-S. In this case, resistance values of the first signal lines SL 1  and the first connection wiring CL 1  may be reduced, thereby improving the sensing sensitivity of the input sensing layer  200   a . In addition, the first and second guard wirings GRL 1  and GRL 2  can more effectively block the inflow of physical shock, static electricity, etc. from the periphery of the input sensing layer  200   a  (e.g., a hole AH 1 ). 
     In addition, like the first input sensing layer  200   a - 1 , the second input sensing layer  200   a - 2  may include the first signal lines SL 1 , the first connection wiring CL 1 , and the first and second guard wirings GRL 1  and GRL 2 . 
     Referring again to  FIG.  28   , first adjacent connection parts CP 1 _ 11 , CP 1 _ 12 , CPI 1 _ 12 , CP 1 _ 13 , CP 1 _ 21 , CP 1 _ 22 , and CP 1 _ 23  may be spaced apart form a first hole AH 1  by a specific distance and may be located on a first reference boundary line L_REF 1 . As described above, second adjacent connection parts CP 2 _ 11 , CP 2 _ 12 , CP 2 _ 13 , CP 2 _ 21 , CP 2 _ 22  and CP 2 _ 23  may respectively be disposed at intersection points (or intersection areas) of the first reference boundary line L_REF 1  and first through third vertical reference lines LV 1 , LV 2 , and LV 3 . 
     Similarly, the second adjacent connection parts CP 2 _ 11 , CP 2 _ 12 , CP 2 _ 13 , CP 2 _ 21 , CP 2 _ 22  and CP 2 _ 23  may be disposed on the first reference boundary line L_REF 1 . 
     The first adjacent connection parts CP 1 _ 11 , CP 1 _ 12 , CP 1 _ 21 , CP 1 _ 22 , and CP 1 _ 23  may overlap the second adjacent connection parts CP 2 _ 12 , CP 2 _ 13 , CP 2 _ 21 , CP 2 _ 22  and CP 2 _ 23  and may respectively be disposed at the intersection points (or intersection areas) of the first reference boundary line L_REF 1  and the first through third vertical reference lines LV 1 , LV 2 , and LV 3 . 
     The shapes and sizes of adjacent sensor parts SP 1 _A 11 , SP 1 _ 12 , SP 1 _A 13 , SP 1 _A 21 , SP 1 _A 22 , SP 1 _A 23 , SP 2 _A 12 , SP 2 _A 13 , SP 2 _A 22 , and SP 2 _A 23  may be determined by the arrangement of the first adjacent connection parts CP 1 _ 11 , CP 1 _ 12 , CP 1 _ 21 , CP 1 _ 22 , and CP 1 _ 23  and the second adjacent connection parts CP 2 _ 11 , CP 2 _ 12 , CP 2 _ 13 , CP 2 _ 21 , CP 2 _ 22  and CP 2 _ 23 . 
     First adjacent sensor parts SP 1 _A 11 , SP 1 _ 12 , SP 1 _A 13 , SP 1 _A 21 , SP 1 _A 22  and SP 1 _A 23  may be directly connected to each other by the first adjacent connection parts CP 1 _ 11 , CP 1 _ 12 , CP 1 _ 21 , CP 1 _ 22 , and CP 1 _ 23  and may be electrically connected to fourth signal lines SL 4 - 1  and SL 4 - 2  described above. 
     Second adjacent sensor parts SP 2 _A 12 , SP 2 _A 13 , SP 2 _A 22 , and SP 2 _A 23  may be electrically connected by the first and second connection wirings CL 1  and CL 2 . 
     Accordingly, parasitic capacitance between first and second detection electrodes may be reduced. In addition, since the first and second detection electrodes do not overlap light emitting regions PXA-R, PXA-G, and PXA-B (i.e., areas where light is emitted from pixels PX), they may not be visible to a user of the display device  1 _ 1 . 
     The first and second detection electrodes having a mesh shape may include, but are not limited to, silver, aluminum, copper, titanium, nickel, titanium, etc. that can be processed at low temperature. Even if the input sensing layer  200   a  is formed by a continuous process, the damage to organic light emitting diodes OLED included in the display panel  100   a  can be prevented or reduced. 
     Referring to  FIGS.  32  and  33   , a first sensor parts SP 1  may not overlap the light emitting regions PXA-R, PXA-G, and PXA-B and may overlap a non-light emitting region NPXA. Each of the light emitting regions PXA-R, PXA-G, and PXA-B may be defined the same as the light emitting region PXA illustrated in  FIG.  6   . 
     Mesh lines of the first sensor part SP 1  may define a plurality of mesh holes IS-OPR, IS-OPG and IS-OPB (hereinafter, referred to as mesh holes). The mesh lines may have a three-layer structure of titanium/aluminum/titanium. The mesh holes IS-OPR, IS-OPG, and IS-OPB may correspond one-to-one to the light emitting regions PXA-R, PXA-G, and PXA-B. 
     The light emitting regions PXA-R, PXA-G, and PXA-B may be divided into a plurality of groups according to the colors of light generated from the organic light emitting diodes OLED. In  FIG.  18   , the light emitting regions PXA-R, PXA-G, and PXA-B are divided into three groups according to emission colors. 
     The light emitting regions PXA-R, PXA-G, and PXA-B may have different areas according to the colors of light emitted from light emitting layers EML of the organic light emitting diodes OLED. The areas of the light emitting regions PXA-R, PXA-G, and PXA-B may be determined by the types of the organic light emitting diodes. 
     The mesh holes IS-OPR, IS-OPG and IS-OPB may be divided into a plurality of groups having different areas. The mesh holes IS-OPR, IS-OPG and IS-OPB may be divided into three groups according to the corresponding light emitting regions PXA-R, PXA-G, and PXA-B. 
     Although the mesh holes IS-OPR, IS-OPG and IS-OPB are illustrated as corresponding one-to-one to the light emitting regions PXA-R, PXA-G, and PXA-B, the present disclosure is not limited to this case. Each of the mesh holes IS-OPR, IS-OPG and IS-OPB may also correspond to two or more light emitting regions PXA-R, PXA-G, and PXA-B. 
     Although the light emitting regions PXA-R, PXA-G, and PXA-B are illustrated as having various areas, the present disclosure is not limited to this case. The light emitting regions PXA-R, PXA-G, and PXA-B may also have the same size, and the mesh holes IS-OPR, IS-OPG and IS-OPB may also have the same size. The planar shape of the mesh holes IS-OPR, IS-OPG and IS-OPB is not limited and may have a polygonal shape different from a rhombus. The planar shape of the mesh holes IS-OPR, IS-OPG and IS-OPB may also be a polygonal shape with rounded corners. 
     The overlapping relationship between the first connection wiring CL 1  illustrated in  FIG.  29    and signal wirings (e.g., data wirings) and/or data wrings included in the display panel  100   a  may be substantially the same or similar to the overlapping relationship described with reference to  FIGS.  15 ,  16 ,  19 A,  19 B,  19 C, and  19 D . 
     According to exemplary embodiments of the present disclosure, detection electrodes (or first adjacent sensor parts, sensing electrodes) interfered with a hole are connected to each other along a closed loop line spaced apart from an edge of the hole at a specific distance, and detection electrodes (or second adjacent sensor parts, driving electrodes) interfered with the hole and spaced apart from each other are electrically connected by a connection wiring disposed adjacent to the hole. Therefore, a display device can sense an external input through the entire display area surrounding the hole while including the hole in the display area. 
     In addition, double routing (or multipathing) is provided for detection electrodes interfering with the hole, thereby reducing the drop of a sensing signal and the reduction of sensing sensitivity. 
     However, the effects of the embodiments are not restricted to the one set forth herein. The above and other effects of the embodiments will become more apparent to one of daily skill in the art to which the embodiments pertain by referencing the claims. 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.