Patent Publication Number: US-11048369-B2

Title: Touch panel including connection electrodes formed differently in first area than second area and display apparatus including the same

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a Continuation of U.S. patent application Ser. No. 15/207,515, filed Jul. 12, 2016, and claims priority to and the benefit of Korean Patent Application No. 10-2015-0168988, filed Nov. 30, 2015, each of which is hereby incorporated by reference for all purposes as if fully set forth herein. 
    
    
     BACKGROUND 
     Field 
     Exemplary embodiments relate to a touch panel and a display apparatus including the same, and, more particularly, to a touch panel configured to prevent (or reduce) defects in curved surface portions and a display apparatus including the same. 
     Discussion of the Background 
     Electronic devices, such as smart phones, digital cameras, laptop computers, navigation units, smart televisions, and the like, that provide images to users, typically include a display apparatus for displaying images. The display apparatus may include a touch function to provide users with a convenient method of interaction. The display apparatus including the touch function may include a display panel and a touch panel disposed on the display panel. The display panel responds to an input signal from the touch panel to display an image corresponding to the input signal. It is also recognized that display apparatuses may be formed in various shapes. For example, a display apparatus may include a curved display panel transformed into a shape of a curved surface by applying a determined force to a flat display panel or configured as a flexible display panel, which may be folded, rolled, flexed, etc. In this manner, the touch panel may also have the same shape as the display panel, and may be disposed on (or incorporated as part of) the display panel. Generally, when the touch panel is transformed from a flat plate shape into a curved surface shape, defects in wiring portions may occur in a curved surface portion. 
     The above information disclosed in this Background section is only for enhancement of understanding of the background of the inventive concept, and, therefore, it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. 
     SUMMARY 
     One or more exemplary embodiments provide a touch panel configured to prevent (or at least reduce) defects in curved surface portions and a display apparatus including the same. 
     Additional aspects will be set forth in the detailed description which follows, and, in part, will be apparent from the disclosure, or may be learned by practice of the inventive concept. 
     According to one or more exemplary embodiments, a touch panel includes a substrate, detection electrodes, and connection electrodes. The substrate includes a planar surface portion and a curved surface portion adjacent to the planar surface portion in a first direction, the curved surface portion including an active region and another region disposed outside the active region. The detection electrodes are disposed on the substrate. The detection electrodes are arranged in the first direction and a second direction crossing the first direction. The connection electrodes electrically connect adjacent detection electrodes arranged in a same direction as one another. A connection electrode of the connection electrodes connecting detection electrodes adjacent to each other of the detection electrodes arranged in the first direction is disposed in the active region of the curved surface portion. The connection electrode includes a portion extending in a different direction than the first direction. 
     According to one or more exemplary embodiments, a display apparatus includes a display panel configured to display an image and a touch panel disposed on the display panel. The touch panel includes a substrate, detection electrodes, and connection electrodes. The substrate includes a planar surface portion and a curved surface portion adjacent to the planar surface portion in a first direction, the curved surface portion including an active region and another region disposed outside the active region. The detection electrodes are disposed on the substrate. The detection electrodes are arranged in the first direction and a second direction crossing the first direction. The connection electrodes electrically connect adjacent detection electrodes arranged in a same direction as one another. A connection electrode of the connection electrodes connecting detection electrodes adjacent to each other of the detection electrodes extending in the first direction is disposed in the active region of the curved surface portion. The connection electrode includes a portion extending in a different direction than the first direction. 
     The foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the claimed subject matter. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which are included to provide a further understanding of the inventive concept, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the inventive concept, and, together with the description, serve to explain principles of the inventive concept. 
         FIG. 1  schematically illustrates an exploded perspective view of a display apparatus, according to one or more exemplary embodiments. 
         FIG. 2  is a plan view illustrating a touch panel of the display apparatus of  FIG. 1 , according to one or more exemplary embodiments. 
         FIG. 3  is a partial, enlarged view of a first signal line having a zigzag pattern, according to one or more exemplary embodiments. 
         FIG. 4  illustrates a portion of a signal line having a straight line shape, according to one or more exemplary embodiments. 
         FIG. 5A  illustrates a connection configuration of detection electrodes in a curved surface portion of the touch panel of  FIG. 2 , according to one or more exemplary embodiments. 
         FIG. 5B  illustrates a connection configuration of detection electrodes in a planar surface portion of the touch panel of  FIG. 2 , according to one or more exemplary embodiments. 
         FIG. 6  illustrates a portion of signal lines of a display apparatus, according to one or more exemplary embodiments. 
         FIG. 7  illustrates a connection configuration of detection electrodes in a curved surface portion of a display apparatus, according to one or more exemplary embodiments. 
         FIG. 8  illustrates a connection configuration of detection electrodes in a curved surface portion of a display apparatus, according to one or more exemplary embodiments. 
         FIG. 9  illustrates a connection configuration of detection electrodes in a planar surface portion of a display apparatus, according to one or more exemplary embodiments. 
         FIG. 10  illustrates a connection configuration of detection electrodes in a planar surface portion of a display apparatus, according to one or more exemplary embodiments. 
         FIG. 11  illustrates partial regions of a curved surface portion and a planar portion in a display apparatus, according to one or more exemplary embodiments. 
         FIG. 12  illustrates partial regions of a curved surface portion and a planar surface portion in a display apparatus, according to one or more exemplary embodiments. 
     
    
    
     DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS 
     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. 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. 
     Unless otherwise specified, the illustrated exemplary embodiments are to be understood as providing exemplary features of varying detail of various exemplary embodiments. Therefore, unless otherwise specified, the features, components, modules, layers, films, panels, regions, and/or aspects of the various illustrations may be otherwise combined, separated, interchanged, and/or rearranged without departing from the disclosed exemplary embodiments. Further, in the accompanying figures, the size and relative sizes of layers, films, panels, regions, etc., may be exaggerated for clarity and descriptive purposes. Also, like reference numerals denote like elements. 
     When an element or 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. Further, the DR 1 -axis and the DR 2 -axis are not limited to axes of a rectangular coordinate system, and may be interpreted in a broader sense. For example, the DR 1 -axis and the DR 2 -axis may be perpendicular to one another, or may represent different directions that are not perpendicular to one another. For the purposes of this disclosure, “at least one of X, Y, and Z” and “at least one selected from the group consisting of X, Y, and Z” may be construed as X only, Y only, Z only, or any combination of two or more of X, Y, and Z, such as, for instance, XYZ, XYY, YZ, and ZZ. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. 
     Although the terms “first,” “second,” etc. may be used herein to describe various elements, components, regions, layers, and/or sections, these elements, components, regions, layers, and/or sections should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, and/or section from another element, component, region, layer, and/or section. Thus, a first element, component, region, layer, and/or section discussed below could be termed a second element, component, region, layer, and/or section without departing from the teachings of the present disclosure. 
     Spatially relative terms, such as “beneath,” “below,” “lower,” “above,” “upper,” and the like, may be used herein for descriptive purposes, and, thereby, to describe one element or feature&#39;s relationship to another element(s) or feature(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. 
     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 will not be interpreted in an idealized or overly formal sense, unless expressly so defined herein. 
       FIG. 1  schematically illustrates an exploded perspective view of a display apparatus, according to one or more exemplary embodiments. 
     Referring to  FIG. 1 , a display apparatus  300  may include a display panel  100  and a touch panel  200  disposed on the display panel  100 . The display panel  100  and the touch panel  200  may have flexibility. For example, display elements are disposed on a flexible substrate, such that the display panel  100  may have flexibility. Also, touch elements are disposed on the flexible substrate, such that the touch panel  200  may have flexibility. 
     The display panel  100  may be an organic light emitting display panel including an organic light emitting element; however, exemplary embodiments are not limited thereto. For instance, various display panels, such as liquid crystal display panels, electrowetting display panels, electrophoretic display panels, etc., may be used. When the display panel  100  is a liquid crystal display panel, the display apparatus  300  may further include a lighting unit disposed under and/or at one or more edges of the display panel  100  and configured to provide light to the display panel  100 . 
     The display panel  100  and the touch panel  200  may have a short side in a first direction DR 1 , and a long side in a second direction DR 2  crossing the first direction DR 1 . The first direction DR 1  may correspond to a row direction, and the second direction DR 2  may correspond to a column direction. To this end, the touch panel  200  may be disposed on the display panel  100  with respect to a third direction crossing the first direction DR 1  and the second direction DR 3 , such as perpendicular (or substantially perpendicular) to the first direction DR 1  and the second direction DR 2 . 
     The display panel  100  and the touch panel  200  include a planar surface part (or portion) PA having a flat shape, and curved surface parts (or portions) CA disposed on both sides of the planar surface part PA in each of the display panel  100  and the touch panel  200  in the first direction DR 1 . The curved surface parts CA may have a curved surface shape with a determined radius of curvature with respect to the first direction DR 1 . The curved surface parts CA may integrally connect with the planar surface part PA. For instance, after the display panel  100  and/or the touch panel  200  are prepared in flat plate shapes, a determined force is applied to determined regions of one side and the other side of each of the display panel  100  and the touch panel  200  such that the curved surface parts CA are formed. After the curved surface parts CA are formed, the display panel  100  and the touch panel  200  are accommodated (or supported) in a case member with a shape corresponding to the curved surface parts CA such that the curved surface parts CA of the display panel  100  and the touch panel  200  may maintain the curved surface shape. Such a display apparatus  300  may be called an edge-type display apparatus. 
     According to one or more exemplary embodiments, when an input tool, such as a human hand, a touch pen, etc., contacts (or almost contacts) a screen, the touch panel  200  converts the contact position into an electrical signal. The signal converted into an electronic signal may be provided to the display panel  100  as an input signal. The display panel  100  provides a user with an image corresponding to the input signal in response to the input signal provided from the touch panel  200 . 
     As a method of implementing the touch panel  200 , a resistive overlay method, a capacitive overlay method, a surface acoustic wave method, an infrared method, or the like may be used. As an exemplary embodiment, the touch panel  200  may be a capacitive overlay-type touch panel  200 . The capacitive overlay-type touch panel  200  includes a plurality of detection electrodes, which are described later. When a human hand, a touch pen, etc., contacts (or almost contacts) a screen, the touch panel  200  detects a change in the capacitance formed between the detection electrodes and converts the contact position into an electrical signal. 
       FIG. 2  is a plan view illustrating a touch panel of the display apparatus of  FIG. 1 , according to one or more exemplary embodiments. 
     Referring to  FIG. 2 , the touch panel  200  includes a substrate  210 , a plurality of detection electrodes  10  and  20 , a plurality of pads  30 , a plurality of signal lines  40 , and a bonding (or connection) part  50 . The detection electrodes  10  and  20 , the pads  30 , the signal lines  40 , and the bonding part  50  are disposed on the substrate  210 . The bonding part  50  may include a plurality of bonding pads (third pads)  53  electrically connected to the signal lines  40 . 
     The substrate  210  may include a transparent film. As the transparent film, polyethylene terephthalate (PET), polyethylene (PE), polycarbonate (PC), cyclo olefin polymer (COP), cyclic olefin copolymer (COC), polymide (PI), polyvinyl chloride (PVC), polymethyl methacrylate (PMMA), polypropylene (PP), polystyrene (PS), and the like, may be used. 
     The substrate  210  of the touch panel  200  may include an active region AA and an inactive region NAA surrounding (or disposed outside) the active region AA. The detection electrodes  10  and  20  are disposed on the active region AA, and the pads  30 , the signal lines  40  and the bonding part  50  are disposed on the inactive region NAA. Furthermore, the substrate  210  may include the planar surface part PA having a flat shape, and curved surface parts CA disposed on both sides of the planar surface part PA in the first direction DR 1 . 
     Referring to  FIG. 2 , in the first direction DR 1 , a determined region on the both sides of the outermost active region AA may be disposed on the region of the curved surface parts CA. The active region AA, which is not disposed on the curved surface parts CA, is disposed on the region of the planar surface part PA. In this manner, the detection electrodes  10  and  20 , which are disposed on the outermost region on the left side of the active region AA and the outermost region on the right side of the active region AA, may be disposed on determined regions of the curved surface parts CA adjacent to the planar surface part PA. 
     According to one or more exemplary embodiments, the detection electrodes  10  and  20  may have a polygonal shape having the same shape and size as one another. For example, the detection electrodes  10  and  20  may have any one shape of a triangular shape or a diamond shape. The detection electrodes  10  and  20  having a diamond shape are shown, however, in order to dispose the detection electrodes  10  and  20  to be matched to a boundary portion of the active region AA, the triangle-shaped detection electrodes  10  and  20 , which are portions (e.g., halves) of the diamond-shaped detection electrodes  10  and  20  may be used. In other words, the detection electrodes having triangular shapes of the detection electrodes  10  and  20  may be disposed on the boundary of the active region AA. The detection electrodes having diamond shapes of the detection electrodes  10  and  20  may be disposed on a portion of the active region AA at which the detection electrodes having triangular shapes are not disposed. 
     The detection electrodes  10  and  20  may include conductive materials configured to transmit the image light provided from the display panel  100 . For example, the detection electrodes  10  and  20  may include a transparent conductive material, such as indium tin oxide (ITO), indium zinc oxide (IZO), poly(3,4-ethylenedioxythiophene) (PEDOT), or carbon nanotube (CNT). It is contemplated, however, that any other suitable material may be utilized in association with exemplary embodiments. 
     In one or more exemplary embodiments, the detection electrodes  10  and  20  are arranged in a plurality of rows and a plurality of columns on the active region AA of the substrate  210 . For instance, first detection electrodes  10  arranged in rows are connected on a row-by-row basis by first connecting electrodes, and second detection electrodes  20  arranged in columns are connected on a column-by-column basis by second connecting electrodes. That is, the first electrodes  10  arranged in rows are connected in the first direction DR 1  by the first connecting electrodes, and the second detection electrodes  20  arranged in columns are connected in the second direction DR 2  by the second connecting electrodes. 
     The first and second detection electrodes  10  and  20  may be alternately disposed without overlapping each other. A capacitance is formed between the first and second detection electrodes  10  and  20 . The first and second connecting electrodes, which connect the first and second detection electrodes  10  and  20  in any one direction, may have bent shapes. The detailed configurations of the first connecting electrodes that connect the first detection electrodes  10  and the second connecting electrodes that connect the second detection electrodes  20  will be described in detail below. 
     The pads  30 , signal lines  40 , and bonding part  50  may be defined as a wiring part that transmits a touch signal detected by the first and second detection electrodes  10  and  20 . The wiring part is connected to ends of the first detection electrodes  10  arranged in rows and to ends of the second detection electrodes  20  arranged in columns. For instance, the pads  30  may include a plurality of first pads  31  electrically connected to the first detection electrodes  10  arranged in rows and a plurality of second pads  32  electrically connected to the second detection electrodes  20  arranged in columns. For example, referring to  FIG. 2 , the first pads  31  may be electrically connected to a first side of the first detection electrodes  10  arranged in odd numbered rows and to a second other side opposite to the one side of the first detection electrodes  10  arranged in even numbered rows. The second pads  32  may be electrically connected to a lower side of the second detection electrodes  20  arranged in columns. 
     Each of the signal lines  40  is electrically connected to the each of the pads  30 . The signal lines  40  may include a relatively low resistance material, such as molybdenum (Mo), silver (Ag), titanium (Ti), copper (Cu), aluminum (Al), nickel (Ni), or molybdenum/aluminum/molybdenum (Mo/Al/Mo). Also, the signal lines  40  may be formed by printing silver paste, which is a conductive material, on the substrate  210 . 
     The signal lines  40  extend via the inactive region NAA adjacent to a first side (e.g. left side) of the active region AA, the inactive region NAA adjacent to a second side (e.g. right side) of the active region AA, and the inactive region NAA adjacent to a lower side of the active region AA. Each of the signal lines  40  may extend to be electrically connected to each of the third pads  53  of the bonding part  50 . For instance, the signal lines  40  include a plurality of first signal lines  41  connected to the first pads  31  and a plurality of second signal lines  42  connected to the second pads  32 . The first signal lines  41  may extend, from the first pads  31  to the third pads  53 , while being bent in the first direction DR 1 , the second direction DR 2 , and the first direction DR 1 , and the second direction DR 2 . As shown in  FIG. 2 , the part of the first signal lines  41  extending in the first direction DR 1  in the curved surface part CA may have zigzag patterns. The second signal line  42 , which is disposed on the center of the substrate  210  in the first direction DR 1  from among the second signal lines  42 , extends in the second direction DR 2 . The second signal lines  42 , except for the second signal line  42  that is disposed on the center of the substrate  210  in the first direction DR 1  from among the second signal lines  42 , extend, from the second pads  32  to the third pads  53 , while being bent in the second direction DR 2 , and the first direction DR 1 , and the second direction DR 2 . As shown in  FIG. 2 , the part of the second signal lines  42  extending in the first direction DR 1  in the curved surface part CA may have zigzag patterns. 
     The bonding part  50  may be disposed on a lower portion of the substrate  210  in the second direction DR 2 . The bonding part  50  may be connected to an external drive circuit (not shown), such as a detection circuit. When a human hand, a touch pen, or the like, contacts the screen of the display apparatus  300 , capacitance formed between the first and second electrodes  10  and  20  may change. The change in the capacitance according to contact positions may be transmitted to the drive circuit via the pads  30 , signal lines  40 , and the bonding part  50 . The change in the capacitance is converted into an electrical signal by, for example, an X- and Y-input processing circuit (not shown) of the drive circuit, such that the contact position may be determined. 
       FIG. 3  is a partial, enlarged view of a first signal line having a zigzag pattern, according to one or more exemplary embodiments.  FIG. 4  illustrates a portion of a signal line having a straight line shape, according to one or more exemplary embodiments. 
     Referring to  FIG. 3 , the first signal line  41  having a zigzag pattern may have a repetitive zigzag shape while being bent at a determined angle θ with respect to the first direction DR 1 . As shown in  FIG. 2 , from the first pads  31  to the third pads  53 , the first signal lines  41  may extend while being bent in the first direction DR 1 , the second direction DR 2 , and the first direction DR 1 , and the second direction DR 2 , thereby the part of the first signal lines  41  extending in the first direction DR 1  in the curved surface part CA may have zigzag patterns. The determined angle θ may be greater than 0 degrees and equal to or less than 45 degrees with respect to the first direction DR 1 . 
     When a determined force is applied to determined regions of one side and the other side of the touch panel  200  having a shape of flat plate such that the curved surface parts CA having a determined radius of curvature with respect to the first direction DR 1 , stress S (e.g. tensile stress) may be generated at the part of the first signal lines extending the first direction DR 1  among the first signal lines  40  disposed on the curved surface parts CA in the first direction DR 1 . However, when the first signal line  41  extending in the first direction DR 1  and having a zigzag pattern as shown in  FIG. 3  is provided, the stress S may be distributed in the first direction DR 1  and a direction that defines a determined angle θ with respect to the first direction DR 1 . That is, the stress S associated with forming the curved surface parts CA may be distributed in the first direction DR 1  and along the first signal line  41  having a zigzag pattern. 
     As a comparative example, when a signal line  40 ′ that is disposed on the curved surface parts CA and extends in the first direction DR 1  having a straight line shape, as shown in  FIG. 4 , the stress S may be generated only in the first direction DR 1 . That is, since the stress S is not distributed (unlike the exemplary embodiment of  FIG. 3 ), the signal line  40 ′ may be damaged due to the stress S generated only in the first direction DR 1 . However, in one or more exemplary embodiments, the first signal lines  41  extending in the first direction DR 1  in the curved surface part CA may have zigzag patterns. In this manner, the stress S associated with forming the curved surface parts CA is distributed and the first signal lines  41  may, thereby, be prevented (or at least reduced) from being damaged. Although the first signal lines  41  are exemplarily described in  FIG. 3 , the second signal lines  42  having zigzag patterns in the curved surface parts CA may also be prevented (or at least reduced) from being damaged and may be configured similarly to the first signal lines  41 . 
       FIG. 5A  illustrates a connection configuration of detection electrodes in a curved surface portion of the touch panel of  FIG. 2 , according to one or more exemplary embodiments.  FIG. 5B  illustrates a connection configuration of detection electrodes in a planar surface portion of the touch panel of  FIG. 2 , according to one or more exemplary embodiments. 
     Referring to  FIGS. 5A and 5B , the first connection electrodes  11  and  12  electrically connect the first detection electrodes  10  adjacent to each other. The second connection electrodes  21  electrically connect the second detection electrodes  20  adjacent to each other. The first and second detection electrodes  10  and  20  may be disposed on layers different from each other with an insulating film (not shown) disposed therebetween. For example, the second detection electrodes  20  may be disposed on the substrate  210 , the insulating film may be disposed on the second detection electrodes  20 , and the first detection electrodes  10  may be disposed on the insulating film. The first connection electrodes  11  and  12  and the second connection electrodes  21  are disposed with the insulating film disposed therebetween. 
     The first detection electrodes  10  and the first connection electrodes  11  and  12  may be simultaneously patterned on the same layer with the same material and, as such, may be integrally formed. The second detection electrodes  20  and the second connection electrodes  21  may be simultaneously patterned on the same layer with the same material and, as such, may be integrally formed; however, exemplary embodiments are not limited thereto. For instance, the first and second detection electrodes  10  and  20  may be disposed on the same layer. In this manner, the second detection electrodes  20  and the second connection electrodes  21  may be integrally formed, and the first connection electrodes  11  and  12  disposed on the insulating film may be connected to the first detection electrodes  10  adjacent to each other through contact holes formed to pass through the insulating film. To this end, the first detection electrodes  10  adjacent to each other may be electrically connected by the first connection electrodes  11  and  12 . It is also contemplated that the first detection electrodes  10  and the first connection electrodes  11  and  12  may be integrally formed, and the second connection electrodes  21  disposed on the insulating film may be connected to the second detection electrodes  20  adjacent to each other through contact holes. To this end, the second detection electrodes  20  adjacent to each other may be electrically connected by the second connection electrodes  21 . 
     Referring to  FIG. 5A , the first connection electrode  11  that is disposed on the curved surface part CA and connects the first detection electrodes  10  in the first direction DR 1  may extend to be inclined at a determined angle with respect to the first direction DR 1 . For instance, the first connection electrode  11  disposed on the curved surface part CA has a bent shape and electrically connect the first detection electrodes  10  adjacent to each other in the curved surface part CA. For instance, the first connection electrode  11  may have a doubly bent shape in which determined regions of both sides of the first connection electrode  11  are bent two times in directions opposite to each other. 
     As shown in  FIG. 5A , the first connection electrode  11  includes a first extension part  11 _ 1  connected to one side of a corresponding first detection electrode  10  of the first detection electrodes  10 , a second extension part  11 _ 2  connected to the first extension part  11 _ 1 , and a third extension part  11 _ 3  connected to the second extension part  11 _ 2 . The first extension part  11 _ 1  extends and is bent toward an upper right side from the first direction DR 1  at a determined angle with respect to the first direction DR 1 . The second extension part  11 _ 2  is connected to an end of the first extension part  11 _ 1  and extends to be bent toward a lower right side from the first direction DR 1  at a determined angle with respect to the first direction DR 1 . The third extension part  11 _ 3  is connected to an end of the second extension part  11 _ 2  and extends to be bent toward an upper right side at a determined angle with respect to the first direction DR 1 . 
     The third extension part  11 _ 3  is connected to the first detection electrode  10  that is adjacent to the first detection electrode  10  connected to the first extension part  11 _ 1 . As illustrated in  FIG. 5A , the first and third extension parts  11 _ 1  and  11 _ 3  may extend parallel to one another, but exemplary embodiments are not limited thereto. For instance, the first and third extension parts  11 _ 1  and  11 _ 3  may not extend parallel to one another. The second connection electrode  21  disposed on the curved surface part CA has a straight line shape and electrically connects the second detection electrodes  20  adjacent to each other in the curved surface part CA. 
     Referring to  FIG. 5B , the first connection electrode  12  disposed on the planar surface part PA has a straight line shape and electrically connects the first detection electrodes  10  adjacent to each other in the planar surface part PA. The second connection electrode  21  disposed on the planar surface part PA has a straight line shape and electrically connects the second detection electrodes  20  adjacent to each other in the planar surface part PA. 
     According to one or more exemplary embodiments, when a determined force is applied to the touch panel  200  having a flat plate shape such that the curved surface parts CA having a determined radius of curvature with respect to the first direction DR 1  are formed, the stress S (e.g. tensile stress) may be generated at the part of the signal lines  40  extending in the first direction DR 1  among the signal lines  40  disposed on the curved surface parts CA in the first direction DR 1 . When the first connection electrode  11  has a straight line shape extending in the first direction DR 1  in the curved surface parts, the first connection electrode  11  may be damaged as described with reference to  FIG. 4  since the stress S is not distributed. However, the first connection electrode  11  has a doubly bent shape similar to the zigzag patterns of the first signal lines  41 , so that the stress S may be distributed in the first connection electrode  11 . In this manner, the stress S associated with forming the curved surface parts CA is distributed and the signal lines  40  and the first connection electrode  11  may be prevented from being damaged. 
     Although the first connection electrode  11  having a doubly bent shape is exemplarily described in  FIG. 5A , exemplary embodiments are not limited thereto. When the curved surface parts CA having a determined radius of curvature with respect to the second direction DR 2  are formed on determined regions on both sides of the touch panel  200  with respect to the second direction DR 2 , the first connection electrode  11  may have a straight line shape, and the second connection electrodes  21  may have the same shape as the first connection electrodes  11  shown in  FIG. 5A . In this manner, the touch panel  200  and the display apparatus  300  including the touch panel  200  may prevent defects associated with stress, which may be generated in the curved surface parts CA and may be distributed by the signal lines  40  having zigzag patterns and the first connection electrode  11  having a bent shape. 
       FIG. 6  illustrates a portion of signal lines of a display apparatus, according to one or more exemplary embodiments.  FIG. 7  illustrates a connection configuration of detection electrodes in a curved surface portion of a display apparatus, according to one or more exemplary embodiments. 
     Referring to  FIG. 6 , a first signal line  41 _ 1  extending in the first direction DR 1  on a curved surface part CA has a wavy pattern. Although not shown, the second signal lines extending in the first direction DR 1  on the curved surface part CA may have a zigzag pattern. In the same manner, a first connection electrode  13  on the curved surface part CA has a wavy pattern shape and electrically connects first detection electrodes  10  adjacent to each other as shown in  FIG. 7 . Except for the configuration of the first signal line  41 _ 1 , the second signal lines, and the first connection electrode  13 , the display apparatus and touch panel of  FIGS. 6 and 7  is similarly configured as the display apparatus  300  and touch panel  200  of  FIGS. 3 and 5A . It is noted that the wavy pattern shape may also distribute stress similar to the bent shape. As such, the display apparatus according to one or more embodiments may prevent defects that may occur in the curved surface parts CA. 
       FIG. 8  illustrates a connection configuration of detection electrodes in a curved surface portion of a display apparatus, according to one or more exemplary embodiments. FIG.  9  illustrates a connection configuration of detection electrodes in a planar surface portion of a display apparatus, according to one or more exemplary embodiments.  FIG. 10  illustrates a connection configuration of detection electrodes in a planar surface portion of a display apparatus, according to one or more exemplary embodiments. 
     Referring to  FIG. 8 , a first connection electrode  11  disposed on a curved surface part CA may have a bent shape like the first connection electrode  11  described with reference to  FIG. 5A . The first connection electrode  11  electrically connects first detection electrodes  10  adjacent to each other. A second connection electrode  22  that is disposed on a curved surface part CA and electrically connects second detection electrodes  20  in a second direction DR 2  may have a bent shape similar to the first connection electrode  11 . Except for the aforementioned configurational difference, the display apparatus and touch panel of  FIG. 8  have the same configuration as the display apparatus  300  and touch panel  200  of  FIG. 5A . 
     Referring to  FIG. 9 , a first connection electrode  11  disposed on a planar surface part PA may have a bent shape like the first connection electrode  11  described with reference to  FIG. 5A . The first connection electrode  11  electrically connects first detection electrodes  10  adjacent to each other. Referring to  FIG. 10 , first and second connection electrodes  11  and  22  disposed on a planar surface part PA may have bent shapes like the first and second connection electrodes  11  and  22  described with reference to  FIG. 8 . Except for the aforementioned configurational difference, the display apparatuses and touch panels of  FIGS. 9 and 10  have the same configuration as the display apparatus  300  and touch panel  200  of  FIG. 5B . 
       FIG. 11  illustrates partial regions of a curved surface portion and a planar portion in a display apparatus, according to one or more exemplary embodiments.  FIG. 12  illustrates partial regions of a curved surface portion and a planar surface portion in a display apparatus, according to one or more exemplary embodiments. 
     Referring to  FIG. 11 , first detection electrodes  10  and  10 _ 1  include a plurality of first sub detection electrodes  10  having diamond shapes and a plurality of second sub detection electrodes  10 _ 1  having circular or semi-circular shapes. Second detection electrodes  20  and  20 _ 1  include a plurality of third sub detection electrodes  20  having diamond shapes and a plurality of fourth sub detection electrodes  20 _ 1  having circular or semi-circular shapes. 
     The first and third sub detection electrodes  10  and  20  having diamond shapes are disposed on an active region AA overlapping a planar surface part PA. The second and fourth sub detection electrodes  10 _ 1  and  20 _ 1  having semi-circular shapes may be disposed on the boundary of the active region AA overlapping a curved surface part CA. The second and fourth sub detection electrodes  10 _ 1  and  20 _ 1  having circular shapes are disposed on the active region AA overlapping the curved surface part CA and the boundary between the curved surface part CA and the planar surface part PA in the active region AA. 
     Except for the above-mentioned configurational differences, the display apparatus and touch panel of  FIG. 11  has the same configuration as the display apparatus  300  and touch panel of  FIGS. 5A and 5B . 
     Referring to  FIG. 12 , first detection electrodes  10  and  10 _ 2  include a plurality of first sub detection electrodes  10  having diamond shapes and a plurality of second sub detection electrodes  10 _ 2  having hexagonal or trapezoidal shapes. Second detection electrodes  20  and  20 _ 2  include a plurality of third sub detection electrodes  20  having diamond shapes and a plurality of fourth sub detection electrodes  20 _ 2  having hexagonal or trapezoidal shapes. 
     The first and third sub detection electrodes  10  and  20  having diamond shapes are disposed on an active region AA overlapping a planar surface part PA. The second and fourth sub detection electrodes  10 _ 2  and  20 _ 2  having trapezoidal shapes may be disposed on the boundary of the active region AA overlapping a curved surface part CA. The second and fourth sub detection electrodes  10 _ 2  and  20 _ 2  having hexagonal shapes are disposed on the active region AA overlapping the curved surface part CA. and the boundary between the curved surface part CA and the planar surface part PA in the active region AA. 
     Except for the above-mentioned configurational differences, the display apparatus and touch panel of  FIG. 12  has the same configuration as the display apparatus  300  and touch panel  200  of  FIGS. 5A and 5B . 
     According to one or more exemplary embodiments, a diamond shape is substantially a rectangle and has four sides. As the number of sides increases, the more the stress may be distributed. Accordingly, the stress may be distributed more in the hexagonal touch electrodes  10 _ 2  and  20 _ 2  than in the diamond shaped electrodes. Also, the circular shape may distribute more stress than the polygonal shape. Accordingly, the stress may be distributed more in the circular touch electrodes  10 _ 1  and  20 _ 1 . 
     Although the detection electrodes  10 _ 1 ,  20 _ 1 ,  10 _ 2  and  20 _ 2  having the circular, hexagonal, semi-circular, and trapezoidal shapes are exemplarily described with reference to  FIGS. 11 and 12 , the shape of the detection electrodes are not limited thereto, and may be variously set. For example, detection electrodes having a polygonal shape with a number of sides greater than four, and detection electrodes that are halves of the detection electrodes may be disposed on the touch panel. 
     According to one or more exemplary embodiments, the display apparatuses and touch panels may prevent defects, which may occur in curved surface parts CA, by the signal lines having zigzag patterns and the first connection electrode having bent shapes. It is noted, however, that a touch panel and a display apparatus may include signal lines having bent shapes or wavy pattern shapes and similar connection electrodes, so that defects in curved surface parts may be prevented. 
     Although certain exemplary embodiments and implementations have been described herein, other embodiments and modifications will be apparent from this description. Accordingly, the inventive concept is not limited to such embodiments, but rather to the broader scope of the presented claims and various obvious modifications and equivalent arrangements.