Display panel and display device including the same

Abstract

A display panel is disclosed. The display panel includes a display substrate and a plurality of pad groups, wherein the display substrate has a display area for displaying an image and a pad area arranged on at least one side of the display area; the plurality of pad groups are arranged on the pad area in a first direction, the plurality of pad groups include a first pad group and a second pad group, wherein the first pad group has a plurality of first pads, at least some of the plurality of first pads have a first inclination relative to a reference line extending in a second direction different from the first direction, and the plurality of first pads are spaced apart from each other at a first spacing, and the second pad group has a plurality of second pads, at least some of the plurality of second pads have a second inclination relative to the reference line different from the first inclination, and the plurality of second pads are spaced apart from each other at a second spacing different from the first spacing.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2018-0055254, filed on May 15, 2018, which is hereby incorporated by reference for all purposes as if fully set forth herein. Technical Field

[0003] Exemplary embodiments of the present invention generally relate to a display panel and a display apparatus including the display panel, and more particularly, to a display panel having a reduced inactive region area outside a display region and a display apparatus including the display panel. Background Art

[0004] Various types of display devices are being used to provide image information. Such display devices include a display area on which an image is displayed and a panel pad disposed outside the display area for providing a driving signal to a display portion displaying the image.

[0005] In order to arrange the panel pads and the connection lines connecting the panel pads to the display part, space is required at the periphery of the display area. Minimizing the area on which the panel pads are arranged increases the relative ratio of the display area to the peripheral area in the display device and reduces the ineffective area, thereby improving the design freedom of the display device.

[0006] The above information disclosed in this Background section is only for understanding the background of the inventive concept and therefore it may contain information that does not constitute prior art. Summary of the invention

[0007] A display panel and a display device including the display panel constructed according to exemplary embodiments of the present invention have a reduced dead area compared to conventional designs.

[0008] According to the principles and exemplary embodiments of the present invention, a display panel and a display device including a display panel have a minimum or reduced pad area while maintaining the reliability of connection with a connection circuit board. For example, the inclination and spacing of the pads of the pad group can be changed to optimize the layout of the pads. Therefore, when compared with a display panel with a constant inclination and spacing, although the same number of pads are set, the pad area according to the principles of the present invention and some exemplary embodiments can have a relatively reduced length and a relatively reduced ineffective area. In addition, the inclination and spacing of the pads can be optimized to maintain a sufficient contact area with the connection member, thereby achieving good reliability while reducing the ineffective area.

[0009] Additional features of the inventive concept 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 concept.

[0010] According to one or more embodiments of the present invention, a display panel includes a display substrate and a plurality of pad groups, wherein the display substrate has a display area for displaying an image and a pad area arranged on at least one side of the display area; the plurality of pad groups are arranged on the pad area in a first direction, the plurality of pad groups include a first pad group and a second pad group, the first pad group has a plurality of first pads, at least some of the plurality of first pads have a first inclination relative to a reference line extending in a second direction different from the first direction, and the plurality of first pads are spaced apart from each other at a first spacing, the second pad group has a plurality of second pads, at least some of the plurality of second pads have a second inclination different from the first inclination relative to the reference line, and the plurality of second pads are spaced apart from each other at a second spacing different from the first spacing.

[0011] The first pad group may be disposed on a central portion of the pad area, and the second pad group may be disposed on at least one side of the first pad group.

[0012] The second inclination may be greater than the first inclination, and the second interval may be smaller than the first interval.

[0013] The second inclination may be greater than 0 degrees and may be less than or equal to about 50 degrees.

[0014] The second pad group may include: a plurality of first sub pad groups disposed on one side of the first pad group; and a plurality of second sub pad groups disposed on the other side of the first pad group.

[0015] Each of the first and second sub pad groups may include a second pad, wherein second inclinations of the second pads of the first sub pad group may be different from each other, and wherein second inclinations of the second pads of the second sub pad group may be different from each other.

[0016] The second inclination of the second pads of the first sub-pad group may increase outwardly from the central portion toward the end of the pad region in the first direction, and the second interval between the second pads may decrease outwardly from the central portion toward the end of the pad region in the first direction.

[0017] The second inclination of the second pads of the second sub-pad group may increase outwardly from the central portion toward the end of the pad region in the first direction, and the second interval between the second pads may decrease outwardly from the central portion toward the end of the pad region in the first direction.

[0018] The second pad of the nth first sub-pad group in one direction from the first pad group and the second pad of the nth second sub-pad group in another direction from the first pad group can be arranged substantially symmetrically relative to the first pad group, where n can be an integer greater than or equal to 1.

[0019] At least one of a first reference line defined by connecting one end portion of each of the first pad and the second pad and a second reference line defined by connecting the other end portions of each of the first pad and the second pad may be a curve, and the first reference line may be defined to be adjacent to the display area, and the second reference line may be defined to be adjacent to the edge of the display substrate.

[0020] The first reference line may be a curved line convex toward the display area, and the second reference line may be a straight line parallel to an edge of the display substrate.

[0021] The first reference line may be a substantially straight line extending substantially parallel to the edge of the display substrate, and the second reference line may be a curved line convex toward the edge of the display substrate.

[0022] At least some of the first and second pads may have a rectangular shape, at least some of the first pads may have a first length and a first width, and at least some of the second pads may have a second length greater than the first length and a second width less than the first width.

[0023] A first surface area of ​​at least some of the first pads and a second surface area of ​​at least some of the second pads may be substantially the same.

[0024] According to one or more embodiments of the present invention, a display panel includes a display substrate, a plurality of pad groups, and a plurality of connecting lines, wherein the display substrate has a display area for displaying an image and a pad area arranged on at least one side of the display area; the plurality of pad groups are arranged on the pad area in a first direction; the plurality of connecting lines are arranged between the display area and the pad area, wherein the plurality of pad groups include a first pad group and a second pad group, the first pad group having a plurality of first pads, at least some of the plurality of first pads having a first inclination relative to a reference line extending in a second direction different from the first direction, and the plurality of first pads are separated by a first spacing, the second pad group having a plurality of second pads, at least some of the plurality of second pads having a second inclination different from the first inclination relative to the reference line, and the plurality of second pads are separated by a second spacing different from the first spacing.

[0025] The connecting line may include a first connecting line and a second connecting line, wherein the first connecting line includes a first sub-line portion extending from the display area toward the pad area and a second sub-line portion extending from the first sub-line portion and connected to the first pad; the second connecting line includes a third sub-line portion extending from the display area toward the pad area and a fourth sub-line portion extending from the third sub-line portion and connected to the second pad, wherein the second sub-line portion has a third inclination relative to a reference line, and the fourth sub-line portion has a fourth inclination relative to the reference line that is different from the third inclination.

[0026] The first inclination and the third inclination may be substantially the same, and the second inclination and the fourth inclination may be substantially the same.

[0027] According to one or more embodiments of the present invention, a display device includes a display panel and a connection circuit board, wherein the display panel has a display area and a pad area arranged on at least one side of the display area, the pad area includes a plurality of pad groups arranged in a first direction; the connection circuit board includes a plurality of connection pad groups that can be connected to the pad groups, wherein the pad groups include a first pad group and a second pad group, the first pad group has a plurality of first pads, at least some of the plurality of first pads have a first inclination relative to a reference line extending in a second direction different from the first direction and are spaced apart from each other at a first spacing, the second pad group has a plurality of second pads, at least some of the plurality of second pads have a second inclination different from the first inclination relative to the reference line and are spaced apart from each other at a second spacing different from the first spacing, wherein the connection pad groups include a first connection pad group having first connection pads that can be connected to the first pads and a second connection pad group having second connection pads that can be connected to the second pads.

[0028] The first pad group may be disposed on a central portion of the pad area, and the second pad group may be disposed on at least one side of the first pad group, the second inclination may be greater than the first inclination, and wherein the second interval may be smaller than the first interval.

[0029] At least some of the first and second pads have a rectangular shape, and at least some of the first pads may have a first length and a first width, and at least some of the second pads may have a second length greater than the first length and a second width less than the first width. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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 concept.

[0031] Figure 1is a plan view of a portion of a display device constructed according to an exemplary embodiment of the present invention.

[0032] Figure 2 is a plan view showing a portion of a display panel constructed according to an exemplary embodiment of the present invention.

[0033] Figure 3 is a detailed plan view showing a portion of a pad region of a display panel constructed according to an exemplary embodiment of the present invention.

[0034] Figure 4 is a plan view showing a layout of a pad group constructed according to an exemplary embodiment of the present invention.

[0035] Figure 5 is a plan view showing a layout of a pad group constructed according to an exemplary embodiment of the present invention.

[0036] Figure 6 is a plan view showing a change in vertical length according to the inclination of a pad.

[0037] Fig. 7A , Figure 7B and Figure 7C is a graph showing the relationship between the inclination, pitch, and vertical length of the pad.

[0038] Figure 8 is a graph showing the tilt angles of pads according to pad groups according to an exemplary embodiment of the present invention.

[0039] Fig. 9 is a graph showing a pitch of pads according to pad groups according to an exemplary embodiment of the present invention.

[0040] Fig.10 It is shown Figure 2 The plan view of area AA.

[0041] Fig.11 is a plan view showing a portion of a display panel constructed according to an exemplary embodiment of the present invention.

[0042] Fig.12 is a detailed plan view showing a portion of a pad region of a display panel constructed according to an exemplary embodiment of the present invention.

[0043] Fig.13 is a plan view showing a portion of a display panel constructed according to an exemplary embodiment of the present invention.

[0044] Fig.14 is a plan view showing a portion of a pad region of a display panel constructed according to an exemplary embodiment of the present invention.

[0045] Fig.15 is a graph showing the lengths of pads according to pad groups according to an exemplary embodiment of the present invention.

[0046] Fig.16 is a graph showing widths of pads according to pad groups according to an exemplary embodiment of the present invention.

[0047] Fig.17 is an exploded perspective view of a portion of a display device constructed according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0048] In the following description, for the purpose of explanation, many specific details are set forth for a thorough understanding of each exemplary embodiment or embodiment of the present invention. As used herein, "embodiment" and "embodiment" are interchangeable words, which are non-limiting examples of one or more devices or methods to which the inventive concepts disclosed herein are applied. However, it is apparent that each exemplary embodiment may be implemented without these specific details or with one or more equivalent arrangements. In other cases, in order to avoid unnecessary confusion of each exemplary embodiment, known structures and devices are shown in block diagram form. In addition, each exemplary embodiment may be different, but need not be exclusive. For example, without departing from the inventive concept, the specific shape, configuration and features of the exemplary embodiment may be used or performed in another exemplary embodiment.

[0049] Unless otherwise noted, the illustrated exemplary embodiments are interpreted as exemplary features that provide different details of some ways in which the inventive concept can be implemented in practice. Therefore, unless otherwise noted, the features, components, modules, layers, films, panels, regions and / or aspects of each embodiment (hereinafter individually or collectively referred to as "elements") may be combined, separated, exchanged and / or rearranged without departing from the inventive concept.

[0050] The use of hatching and / or shading in the accompanying drawings is generally used to make the boundaries between adjacent elements clear. Thus, unless otherwise specified, the presence or absence of hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, ratio, commonality between the elements shown, and / or any other characteristics, attributes, properties, etc. of the elements. In addition, in the accompanying drawings, the size and relative size of the elements may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, a specific process sequence can be performed differently from the described sequence. For example, two consecutively described processes can be performed substantially simultaneously or in an order opposite to the described sequence. In addition, the same reference numerals represent the same elements.

[0051] 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 there may be an intervening element or layer. However, when an element or layer is referred to as being directly on, directly disposed on, directly connected to or directly coupled to another element or layer, there is no intervening element, film, plate, layer, region, etc. For example, "directly disposed" may mean being disposed without using an additional member (such as a bonding member) between two layers or two members. For this reason, the term "connection" may mean a physical connection, electrical connection and / or fluid connection with or without an intermediate element. In addition, the DR1 axis, the DR2 axis and the DR3 axis are not limited to the three axes of a rectangular coordinate system, such as an x-axis, a y-axis and a z-axis, and can be interpreted in a broader sense. For example, the DR1 axis, the DR2 axis and the DR3 axis may be perpendicular to each other, or may represent different directions that are not perpendicular to each other. For the purpose 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 interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z, for example, 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.

[0052] 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. Therefore, without departing from the teachings of the present disclosure, the first element discussed below may be referred to as the second element.

[0053] 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 thus may be used to describe the relationship of one element relative to another element as shown in the drawings. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientation depicted in the drawings. For example, if the device 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" may encompass both the above and below orientations. Furthermore, the device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and as such, the spatially relative descriptors used herein should be interpreted accordingly.

[0054] The terms used herein are for the purpose of describing specific embodiments and are not intended to be limiting. As used herein, the singular forms "a", "an", and "said" are intended to include the plural forms as well, unless the context clearly indicates otherwise. In addition, when the terms "comprises", "comprising", "includes", and / or "including" are used in this specification, it is indicated that the features, wholes, steps, operations, elements, components, and / or combinations thereof described are present, but the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or combinations thereof are not excluded. It is also worth noting that, as used herein, the terms "substantially", "about", and other similar terms are used as approximate terms rather than as terms of degree, and as such, are used to allow for inherent deviations in measured values, calculated values, and / or provided values ​​that will be recognized by those of ordinary skill in the art.

[0055] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the present disclosure belongs. Terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless explicitly defined as such herein.

[0056] Hereinafter, a display panel and a display device according to exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

[0057] Figure 1 is a plan view of a portion of a display device constructed according to an exemplary embodiment of the present invention. Figure 2 is a plan view showing a portion of a display panel constructed according to an exemplary embodiment of the present invention. Figure 3 is constructed according to an exemplary embodiment of the present invention and Figure 2 Detailed plan view of the portion of the display panel corresponding to the pad area.

[0058] refer to Figure 1 , a display device DD according to an exemplary embodiment of the present invention may include a display panel DP, a connection circuit board FB and a connection member AF. In addition, the display device DD of the present invention may further include a driving circuit board. The connection circuit board FB may be disposed between the display panel DP and the driving circuit board. In the display device DD, the display panel DP and the connection circuit board FB may be electrically connected to each other. In addition, the display device DD may further include a connection member AF disposed between the display panel DP and the connection circuit board FB.

[0059] The display panel DP may include a liquid crystal display panel, an organic light emitting display panel, a plasma display panel, an electrophoretic display panel, a micro-electromechanical system (MEMS) display panel, an electrowetting display panel, etc. For example, in the display device DD, the display panel DP may be a liquid crystal display panel or an organic light emitting display panel. However, exemplary embodiments are not limited thereto.

[0060] The display panel DP may be flexible. "Flexible" means a bendable property and may include a structure that is completely folded into a thickness of a few nanometers. For example, the display panel DP may be a curved display panel or a foldable display panel. In addition, the display panel DP may be rigid.

[0061] refer to Figure 1 , Figure 2 and Figure 3 , the display panel DP may include a display substrate PS and a plurality of pad groups PDG. The display substrate PS may include a display area DA and a pad area PA. The display substrate PS may be divided into a display area DA, a non-display area NDA, and a pad area PA. The pad group PDG may be disposed on the pad area PA. A connection line CL may be disposed between the display area DA and the pad area PA.

[0062] Although in Figure 2 and Figure 3 The display substrate PS includes a first substrate BS1 and a second substrate BS2, but exemplary embodiments are not limited thereto. The display substrate PS may include a plurality of pixels disposed on the display area DA. For example, the display substrate PS may be a liquid crystal display substrate. Specifically, in exemplary embodiments, the display substrate PS may be a liquid crystal display substrate including a liquid crystal layer disposed between the first substrate BS1 and the second substrate BS2.

[0063] However, exemplary embodiments are not limited thereto. For example, the display substrate PS may be an organic light-emitting display substrate. In the case of an organic light-emitting display substrate, the display substrate PS may include a base substrate and an organic light-emitting device layer disposed on the base substrate.

[0064] In addition, the display substrate PS may include a display element, and may be a plasma display substrate, an electrophoretic display substrate, a micro-electromechanical system (MEMS) display substrate, an electrowetting display substrate, or the like.

[0065] The display area DA displays an image and is generally parallel to a plane defined by the first direction axis DR1 and the second direction axis DR2. For example, the display panel DP may provide an image in the direction of the third direction axis DR3. For the convenience of description, the direction in which the image is provided from the display device DD may be defined as an upward direction, and the direction opposite to the upward direction may be defined as a downward direction. In this specification, the directions indicated by the first direction axis DR1, the second direction axis DR2, and the third direction axis DR3 will be described as the first direction DR1, the second direction DR2, and the third direction DR3. In other words, in this specification, the first direction DR1, the second direction DR2, and the third direction DR3 may be the same as the directions of the first direction axis DR1, the second direction axis DR2, and the third direction axis DR3. In this embodiment, the upward direction and the downward direction are parallel to the third direction DR3, wherein the third direction DR3 is defined as a direction perpendicular to the first direction DR1 and the second direction DR2. The third direction DR3 may be a reference direction for distinguishing the front surface and the rear surface of the component to be described below. However, the upward direction and the downward direction may be relative concepts, and thus may be changed to different directions.

[0066] The non-display area NDA is adjacent to the display area DA. The non-display area NDA may surround the edge of the display area DA and may be disposed outside the display area DA. However, exemplary embodiments are not limited thereto. For example, the non-display area NDA may be disposed only on the edge of at least one side of the display area DA. Although the non-display area NDA has a frame shape surrounding the display area DA in the illustrated embodiment, exemplary embodiments are not limited thereto.

[0067] The pad area PA may be disposed on at least one side of the display area DA. The pad area PA may be adjacent to the non-display area NDA. The pad area PA may be disposed outside the non-display area NDA, but exemplary embodiments are not limited thereto.

[0068] The pad area PA may be an area on which the connection circuit board FB and the display substrate PS are coupled. The display panel DP may be electrically connected to external electronic components such as the connection circuit board FB and the driving circuit board through pads PD disposed on the pad area PA.

[0069] The pads PD arranged in the first direction DR1 may be disposed on the pad area PA of the display panel DP. In the pad area PA, a plurality of pad groups PDG may be arranged in the first direction DR1.

[0070] The display substrate PS may receive an electrical signal from the outside or may output an electrical signal to the outside through the pad PD provided on the pad area PA. For example, the pad PD may be an input pad. The pad PD may be connected to the connection line CL.

[0071] The pads PD may be electrically connected to the connection circuit board FB. Each of the pads PD may include a metal such as copper (Cu), silver (Ag) or gold (Au) or a metal oxide. For example, each of the pads PD may include at least one transparent metal oxide such as indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), zinc tin oxide (ZTO) and antimony tin oxide (ATO). In particular, ITO may be patterned on each of the pads PD. In addition, the pads PD may be electrically connected to a driving device that drives the pixels of the display substrate PS through a connection line CL.

[0072] The pad group PDG may be arranged in a first direction DR1. The pad group PDG may include a first pad group G1 and second pad groups G2-R and G2-L, wherein the first pad group G1 has a first inclination relative to a reference line RL and includes a plurality of first pads PD1 spaced apart from each other by a first distance, and the second pad groups G2-R and G2-L have a second inclination relative to the reference line RL and include a plurality of second pads PD2 spaced apart from each other by a second distance. The reference line RL may be a virtual line parallel to the second direction DR2, wherein the second direction DR2 is orthogonal to the first direction DR1. The inclination of each of the pads PD1 and PD2 may represent an angle between an extension direction of the reference line RL and an extension direction of the first pad PD1 or the second pad PD2. In this specification, the inclination value may be a positive value and may represent an acute angle.

[0073] The first inclination of each of the first pads PD1 of the first pad group G1 may be different from the second inclination of each of the second pads PD2 of the second pad groups G2-R and G2-L. In addition, the first distance between the first pads PD1 of the first pad group G1 may be different from the second distance between the second pads PD2 of the second pad groups G2-R and G2-L.

[0074] In an exemplary embodiment, the plurality of pad groups PDG may include a first pad group G1 disposed at a central portion of the pad area PA and second pad groups G2-R and G2-L disposed on at least one side of the first pad group G1. The inclination of each of the second pads PD2 of the second pad groups G2-R and G2-L may be greater than the inclination of each of the first pads PD1 of the first pad group G1. In addition, the distance between the second pads PD2 may be smaller than the distance between the first pads PD1.

[0075] The second pad groups G2-R and G2-L may include a first sub-pad group G2-R disposed on one side of the first pad group G1 and a second sub-pad group G2-L disposed on the other side of the first pad group G1. For example, in the display panel DP according to the illustrated embodiment, the first sub-pad group G2-R may be disposed at the right side of the first pad group G1, and the second sub-pad group G2-L may be disposed at the left side of the first pad group G1.

[0076] The display panel DP may include: a first pad group G1 disposed at a central portion of the pad area PA; a first sub-pad group G2-R disposed at the right side of the first pad group G1, and a second sub-pad group G2-L disposed at the left side of the first pad group G1, wherein the number x is an integer greater than or equal to 1, and the number of the first sub-pad group G2-R and the number of the second sub-pad group G2-L may be the same as or different from each other.

[0077] The plurality of first sub pad groups G2-R may be disposed to be arranged outward from a central portion of the pad area PA. Inclinations of the second pads PD2 included in different first sub pad groups G2-R may be different from each other.

[0078] The inclination of the second pad PD2 of the first sub-pad group G2-R may gradually increase from the central portion of the pad area PA toward the outside. Figure 3 , the inclination of each of the second pads PD2 of the first sub-pad group G2-Rn disposed in the nth group from the first pad group G1 disposed at the central portion may be different from the inclination of each of the second pads PD2 of the first sub-pad group G2-Rx disposed in the xth group from the first pad group G1. In particular, the inclination of the second pads PD2 relative to the reference line RL may gradually increase toward the first sub-pad group G2-R that is farthest from the central portion of the pad area PA.

[0079] In addition, the inclinations of the second pads PD2 included in different second sub-pad groups G2-L may be different from each other. The inclination of the second pads PD2 of the second sub-pad group G2-L may gradually increase from the central portion to the outside. Figure 3 , the inclination of each of the second pads PD2 of the second sub-pad group G2-Ln disposed in the nth group from the first pad group G1 disposed at the central portion of the pad area PA may be different from the inclination of each of the second pads PD2 of the second sub-pad group G2-Lx disposed in the xth group from the first pad group G1. In particular, the inclination of the second pads PD2 relative to the reference line RL may gradually increase toward the second sub-pad group G2-L farthest from the central portion of the pad area PA.

[0080] The intervals between the second pads PD2 of the first sub-pad group G2-R may be different from each other. The distance between the second pads PD2 of the first sub-pad group G2-R may gradually decrease from the central portion of the pad area PA outward. Figure 3 , the distance between the second pads PD2 of the first sub-pad group G2-Rn arranged in the nth group from the first pad group G1 arranged at the central portion may be different from the distance between the second pads PD2 of the first sub-pad group G2-Rx arranged in the xth group from the first pad group G1. In particular, the distance between the second pads PD2, that is, the spacing of the second pads PD2, may gradually decrease toward the first sub-pad group G2-R farthest from the central portion. In this specification, the distance between pads may represent the minimum distance from the center of one pad to the center of another pad among adjacent pads, which is referred to as "pitch".

[0081] In other words, in order to dispose the defined pads PD1 and PD2 within the limited pad area PA, the interval between the pads PD1 and PD2 may be gradually reduced toward the outside of the pad area PA.

[0082] In addition, the distances between the second pads PD2 of the second sub-pad group G2-L may be different from each other. The distances between the second pads PD2 of the second sub-pad group G2-L may also gradually decrease from the central portion of the pad area PA outward. Figure 3 , the distance between the second pads PD2 of the second sub-pad group G2-Ln disposed in the nth group from the first pad group G1 disposed at the central portion may be different from the distance between the second pads PD2 of the second sub-pad group G2-Lx disposed in the xth group from the first pad group G1. In particular, the distance between the second pads PD2, that is, the spacing between each of the second pads PD2, may gradually decrease toward the second sub-pad group G2-L spaced farther from the central portion.

[0083] The first sub-pad group G2-R and the second sub-pad group G2-L may be arranged substantially symmetrically with respect to the first pad group G1. For example, the second pad PD2 of the first sub-pad group G2-Rn arranged in the nth group in one side direction from the first pad group G1 and the second pad PD2 of the second sub-pad group G2-Ln arranged in the nth group in the other side direction from the first pad group G1 may be arranged substantially symmetrically with respect to the first pad group G1. In particular, the second pad PD2 of the first sub-pad group G2-Rn arranged in the nth group in one side direction from the first pad group G1 and the second pad PD2 of the second sub-pad group G2-Ln arranged in the nth group in the other side direction from the first pad group G1 may have substantially the same inclination and substantially the same spacing. However, the inclination direction of the second pad PD2 of the first sub-pad group G2-R and the inclination direction of the second pad PD2 of the second sub-pad group G2-L may be opposite to each other and symmetrical with respect to the first pad group G1 or the reference line RL. In this specification, a symmetrical arrangement may mean line symmetry.

[0084] Figure 4 is a plan view showing a layout of a pad group constructed according to an exemplary embodiment of the present invention, and Figure 4 FIG. 4 shows a portion of the first pad group G1 and the second pad groups G2-R and G2-L. Figure 4 , the extension direction EL-PD2 of the second pad PD2 of the first sub-pad group G2-R may have an angle θ relative to the reference line RL (which is a virtual line). 1 , and each of the second pads PD2 may have a pitch of PT-R. In addition, the extension direction EL-PD2 of the second pads PD2 of the second sub-pad group G2-L may have an angle θ relative to the reference line RL (which is a virtual line). 2 , and each of the second pads PD2 may have a pitch of PT-L. Figure 4 When the first sub-pad group G2-R and the second sub-pad group G2-L shown in FIG. 1 are arranged at positions substantially symmetrical to each other with respect to the first pad group G1, the angle θ 1 and θ 2 may be substantially the same, and the values ​​PT-R and PT-L may be substantially the same.

[0085] The extension direction EL-PD1 of the first pads PD1 of the first pad group G1 may be substantially parallel to the reference line RL. In other words, each of the first pads PD1 may have an inclination of 0 degrees. The distance PT1 between the first pads PD1 may be greater than the distance PT-R between the second pads PD2 of the first sub-pad group G2-R and the distance PT-L between the second pads PD2 of the second sub-pad group G2-L.

[0086] Figure 5is a plan view showing a layout of a pad group constructed according to an exemplary embodiment of the present invention, and Figure 5 FIG. 4 shows a portion of the first pad group G1 and the second sub-pad group G2-L. Figure 5 , the intervals between the second pads PD2 of the second sub-pad group G2-L may gradually decrease in a direction away from the first pad group G1. Figure 5 , the spacings PT-Ln and PT-Lx between the second pads PD2 of the second sub-pad group G2-L may be smaller than the spacing PT1 between the first pads PD1 of the first pad group G1. In addition, the spacing PT-Lx between the second pads PD2 spaced apart from each other of the second sub-pad group G2-Lx in the x-th group from the first pad group PD2 may be smaller than the spacing PT-Ln between the second pads PD2 spaced apart from each other of the second sub-pad group G2-Ln in the n-th group from the first pad group G1.

[0087] Figure 6 is a plan view showing a change in the vertical length of the pad according to the inclination of the pad. Figure 6 In the figure, the inclination of the pad indicates the relative inclination of the pad to the reference line (see Figure 4 The value of the inclination of the reference symbol RL), wherein the reference line is substantially parallel to a second direction DR2 that is perpendicular to the first direction DR1.

[0088] refer to Figure 6 , the vertical length of each of the pads decreases as the value of the inclination of each of the pads increases. The vertical length of the pad may represent the maximum height relative to the lower end of the pad in the vertical direction. With respect to the distance d1 between the upper end and the lower end of the pad having an inclination of 0 degrees, when the pad is set at a predetermined inclination, the vertical length may be less than the distance d1. For example, the vertical length of a pad having an inclination of about 50 degrees may be the distance d2.

[0089] exist Figure 6 In the embodiment of the present invention, when the portion corresponding to the lower end of the pad having an inclination of about 0 degrees is referred to as the lower reference line RL-B and the portion corresponding to the upper end of the pad is referred to as the upper reference line RL-T, as the inclination of the pad increases, the distances S1, S2, S3, and S4 between the upper reference line RL-T and the upper end of the pad may gradually increase. In other words, as the inclination of the pad increases, the vertical length may decrease. Therefore, the pad area (see Figure 3 The vertical length of the reference symbol PA) can be reduced.

[0090] When the pad has a length L, the vertical length d of the pad may satisfy the following formula: Wherein, θ is the angle of the inclination of the pad.

[0091] d=L*cosθ

[0092] exist Figure 2 , Figure 3 and Figure 4 In the exemplary embodiment shown in , each of the second pads PD2 may have an inclination greater than about 0 degrees and less than or equal to about 50 degrees. In other words, the inclination of each of the second pads PD2 relative to the reference line RL may be greater than the inclination of each of the first pads PD1 of the first pad group G1 relative to the reference line RL. For example, the extension direction of the first pad PD1 may be parallel to the extension direction of the reference line RL. The first inclination of each of the first pads PD1 may have a value of about 0 degrees. Therefore, the inclination of each of the second pads PD2 may be greater than the inclination of each of the first pads PD1, and may have an angle greater than about 0 degrees. The inclination of each of the second pads PD2 may be less than about 50 degrees. When the inclination of each of the second pads PD2 is greater than about 50 degrees, the spacing between the second pads PD2 may not be sufficient to avoid a short circuit, thereby reducing reliability.

[0093] Fig. 7A , Figure 7B and Figure 7C The vertical length of each of the pads, the distance of the ineffective area, and the spacing between the pads according to the increase of the inclination of the pads are shown. Fig. 7A 2 shows a case where the distance between the pads (ie, the pitch of the pads) is about 35 μm when the pads are not tilted. Figure 7B shows the case where the pitch of the pads is about 37 μm when the pads are not tilted, and Figure 7C The case where the pitch of the pads is about 39 μm when the pads are not tilted is shown.

[0094] refer to Fig. 7A ,As the inclination of the pad increases, the vertical length of the pad decreases, and the distance of the ineffective area also decreases. Fig. 7A The case where the reduced distance of the invalid area is 111 μm is shown. When the inclination of the pad is reduced within the limited pad area, the spacing of each of the pads set in the pad area must be reduced. Therefore, if the minimum value of the pad spacing (at which the reliability is guaranteed) is about 27 μm, the maximum value of the inclination of the pad can be about 39 degrees.

[0095] Figure 7B and Figure 7C It is shown that as the inclination of each of the pads increases, the vertical length of the pads and the ineffective area distance decrease. Here, it is confirmed that the pad pitch decreases as the inclination of the pads increases. Figure 7B and Figure 7CThe cases where the maximum value of the reduced distance of the ineffective area is about 131 μm and about 153 μm when the maximum value of the pad interval (at which reliability is guaranteed) is about 27 μm are respectively shown. Fig. 7A , Figure 7B and Figure 7C , it was confirmed that the reduction degree of the ineffective area increased with the increase of the pad pitch when the pads were not tilted.

[0096] refer to Figure 7B , in the case where the pads having an inclination of about 0 degrees have a pitch of about 37 μm, when the minimum value of the pad pitch (at which reliability is guaranteed) is about 27 μm, the maximum value of the inclination of the pads may be about 42.5 degrees. Figure 7C , in the case where pads having an inclination of about 0 degrees have a pitch of about 39 μm, when the minimum value of the pad pitch at which reliability is guaranteed is about 27 μm, the maximum value of the inclination of the pads may be about 46 degrees.

[0097] In other words, reference Fig. 7A , Figure 7B and Figure 7C In order to reduce the vertical length of the pad region on which the pads are arranged, the inclination of the pads is increased and the interval between the pads is reduced. Therefore, in the display panel according to the exemplary embodiment, the ineffective area can be reduced.

[0098] Figure 8 is a graph showing the angle of pad inclination for each pad group, and

[0099] Fig. 9 is a graph showing the pad pitch for each pad group. Figure 8 and Fig. 9 The inclinations and pad intervals of pads in the pad group provided in the display panel according to the aforementioned embodiment are shown.

[0100] refer to Figure 8In the display panel according to the exemplary embodiment, each of the pads of the first pad group G1 may have an inclination of about 0 degrees. The first sub-pad group G2-R1, G2-R2, ..., G2-Rn, ..., G2-Rx disposed at one side of the first pad group G1 may have a pad inclination angle that gradually increases as the first sub-pad group G2-R1, G2-R2, ..., G2-Rn, ..., G2-Rx is spaced apart from the first pad group G1. In addition, the second sub-pad group G2-L1, G2-L2, ..., G2-Ln, ..., G2-Lx disposed at the other side of the first pad group G1 may have a pad inclination angle that gradually increases as it is spaced apart from the first pad group G1. The pads of the first sub pad group G2-R1, G2-R2, ..., G2-Rn, ..., G2-Rx and the pads of the second sub pad group G2-L1, G2-L2, ..., G2-Ln, ..., G2-Lx may have tilt angles that are substantially symmetrical to each other with respect to the first pad group G1.

[0101] refer to Fig. 9 In the display panel according to the exemplary embodiment, the value of the pad spacing between the pads of the first pad group G1 may be the largest, and the spacing between the pads of the first sub-pad group G2-R1, G2-R2, ..., G2-Rn, ..., G2-Rx disposed on one side of the first pad group G1 may gradually decrease as they are spaced apart from the first pad group G1. In addition, in the second sub-pad group G2-L1, G2-L2, ..., G2-Ln, ..., G2-Lx disposed at the other side of the first pad group G1, the spacing may gradually decrease as they are spaced apart from the first pad group G1. The pads of the first sub-pad group G2-R1, G2-R2, ..., G2-Rn, ..., G2-Rx and the pads of the second sub-pad group G2-L1, G2-L2, ..., G2-Ln, ..., G2-Lx may have spacings that are substantially symmetrical to each other.

[0102] In other words, reference Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Fig. 7A , Figure 7B , Figure 7C , Figure 8 and Fig. 9 , the display panel DP may include a plurality of pad groups arranged in the first direction DR1, and the inclinations of pads of different pad groups and the spacings between the pads may be different from each other. The inclinations of a plurality of pads of one pad group and the spacings between the pads may be substantially the same. In other words, since different inclination values ​​are provided for each pad group and different spacings are provided for each pad group, the plurality of pad groups may be arranged to minimize the ineffective area on the pad area.

[0103] refer to Figure 2 and Figure 3 According to an exemplary embodiment, one of the first virtual line IL1 connecting the ends of one side of the pad PD adjacent to the display area DA and the second virtual line IL2 connecting the ends of the other side of the pad adjacent to the edge ED of the display substrate PS may be a curve. In other words, according to an exemplary embodiment, a plurality of pad groups PDG may be arranged in a fan shape. The first virtual line IL1 may be a line connecting the centers of the upper ends of the representative pads of each pad group to each other. In addition, the second virtual line IL2 may be a line connecting the centers of the lower ends of the representative pads of each pad group to each other. Here, the representative pad of each pad group may be a pad set at the center among the pads of each pad group. However, exemplary embodiments are not limited thereto. For example, the representative pad may be any pad selected from each pad group.

[0104] refer to Figure 2 and Figure 3 , the first virtual line IL1 may be a curve, and the second virtual line IL2 may be a straight line. In particular, the first virtual line IL1 may have a curve shape protruding toward the display area DA, and the second virtual line IL2 may have a straight line shape parallel to the edge ED of the display substrate PS.

[0105] In the display panel DP, multiple pad groups PDG can be arranged in a fan shape, the inclination of the pads PD of the pad group PDG can gradually increase from the central part of the pad area PA outward, and the pad spacing can gradually decrease from the central part of the pad area PA outward, thereby minimizing or reducing the extension of the pad area PA and the connecting line CL, thereby reducing the invalid area.

[0106] Fig.10 It is shown Figure 2 The plan view of area AA. Fig.10 2 is an enlarged view showing a portion of a display panel DP according to an exemplary embodiment of the present invention. The display panel DP according to the exemplary embodiment may include a display substrate PS, a plurality of pad groups PDG, and connection lines CL.

[0107] The connection line CL may be disposed between the display area DA and the pad area PA. The connection line CL may electrically connect the pixels disposed on the display area DA to the pad PD.

[0108] The connection lines CL may include first connection lines CL1 connected to the first pads PD1 of the first pad group G1 and second connection lines CL2 connected to the second pads PD2 of the second pad groups G2 -R and G2 -L.

[0109] The first connection line CL1 may include a first sub-line portion SL1 extending in a direction from the display area DA to the pad area PA and a second sub-line portion SL2 extending from the first sub-line portion SL1 to be connected to the first pad PD1. In addition, the second connection line CL2 may include a third sub-line portion SL3 extending in a direction from the display area DA to the pad area PA and a fourth sub-line portion SL4 extending from the third sub-line portion SL3 to be connected to the second pad PD2. The first sub-line portion SL1 and the third sub-line portion SL3 may be substantially straight line portions extending from the display area DA to the pad area PA and substantially parallel to the second direction axis DR2. In other words, the first sub-line portion SL1 and the third sub-line portion SL3 may be portions extending substantially parallel to the reference line RL. In an exemplary embodiment, the second sub-line portion SL2 may be a straight line portion extending from the first sub-line portion SL1. The extension direction of the second sub-line portion SL2 may be substantially parallel to the extension direction of the first pad PD1 of the first pad group G1. For example, like the first sub-circuit portion SL1, the second sub-circuit portion SL2 may extend in a direction substantially parallel to the second direction axis DR2. In addition, the fourth sub-circuit portion SL4 may be a portion extending obliquely from the third sub-circuit portion SL3. Here, the second sub-circuit portion SL2 and the fourth sub-circuit portion SL4 may correspond to a structure generally referred to as spider wiring.

[0110] The extension direction of the fourth sub-line portion SL4 may be substantially parallel to the extension direction EL-PD2 of the second pad PD2 of the first sub-pad group G2-Rn or the second sub-pad group G2-Ln. Fig.10 , the angle θ between the reference line RL and the extension direction EL-CL2 of the fourth sub-line portion SL4 c The angle θ between the reference line RL and the extension direction EL-PD2 of the second pad PD2 may be p Basically the same.

[0111] In other words, in the case of the display panel DP according to the exemplary embodiment, the second sub-circuit portion SL2 and the first pad PD1 of the first pad group G1 connected to the second sub-circuit portion SL2 may have substantially the same extension direction, and the fourth sub-circuit portion SL4 and the second pad PD2 of the second pad group G2-R and G2-L connected to the fourth sub-circuit portion SL4 may have substantially the same extension direction, thereby minimizing the length of the second sub-circuit portion SL2 and the fourth sub-circuit portion SL4 (which corresponds to a structure generally referred to as spider web wiring), thereby reducing the invalid area of ​​the display substrate PS.

[0112] Fig.11is a plan view of a display panel constructed according to another exemplary embodiment of the present invention. Fig.12 It shows that according to Fig.11 A detailed plan view of a portion of a pad area of ​​a display panel constructed in accordance with an exemplary embodiment shown in FIG. Fig.11 and Fig.12 In the description of Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Fig. 7A , Figure 7B , Figure 7C , Figure 8 , Fig. 9 and Fig.10 The contents of the display panel DP described in the embodiment overlap, and therefore, their differences will be mainly described. Fig.11 and Fig.12 In the description of the display panel DP-1, except for the pad area PA-1, the pad group PDG and the connection line CL, the reference 1 may be equally applied. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Fig. 7A , Figure 7B , Figure 7C , Figure 8 , Fig. 9 and Fig.10 The content of the description.

[0113] Fig.11 The display panel DP-1 may include a display substrate PS, a plurality of pad groups PDG, and connection lines CL. The display substrate PS of the display panel DP-1 may include a display area DA and a pad area PA-1 disposed on at least one side of the display area DA.

[0114] The plurality of pad groups PDG may include a first pad group G1 disposed at a central portion of the pad area PA and second pad groups G2-R and G2-L disposed on at least one side of the first pad group G1. The second pad groups G2-R and G2-L may include a first sub-pad group G2-R disposed on one side of the first pad group G1 and a second sub-pad group G2-L disposed on the other side of the first pad group G1.

[0115] refer to Fig.11 and Fig.12, one of the first virtual line IL1 connecting the ends of one side of the pads PD1 and PD2 adjacent to the display area DA to each other and the second virtual line IL2 connecting the ends of the other side of the pads PD1 and PD2 adjacent to the edge ED of the display substrate PS may be a curve. In other words, the plurality of pad groups PDG may be arranged in a fan shape. The first virtual line IL1 may be a line connecting the centers of the upper ends of the representative pads of each pad group G1, G2-R, and G2-L to each other. In addition, the second virtual line IL2 may be a line connecting the centers of the lower ends of the representative pads of each pad group to each other. Here, the representative pad of each pad group may be a pad set at the center among the pads of each pad group. However, exemplary embodiments are not limited thereto. For example, the representative pad may be any pad selected from each pad group.

[0116] refer to Fig.11 and Fig.12 , the first virtual line IL1 may be a straight line, and the second virtual line IL2 may be a curve. In particular, the first virtual line IL1 may have a straight line shape parallel to the edge ED of the display substrate PS, and the second virtual line IL2 may have a curve shape protruding toward the edge ED of the display substrate PS.

[0117] The plurality of pad groups PDG may include a first pad group G1 disposed at a central portion of the pad area PA and second pad groups G2-R and G2-L disposed on at least one side of the first pad group G1. The inclination of each of the second pads PD2 of the second pad groups G2-R and G2-L may be greater than the inclination of each of the first pads PD1 of the first pad group G1. In addition, the spacing between the second pads PD2 may be smaller than the spacing between the first pads PD1.

[0118] The display panel DP-1 may include: a first pad group G1 disposed on a central portion of the pad area PA-1; a first sub-pad group G2-R disposed at the right side of the first pad group G1, and a second sub-pad group G2-L disposed at the left side of the first pad group G1, wherein the number x is an integer greater than or equal to 1, and the number of the first sub-pad group G2-R and the number of the second sub-pad group G2-L may be substantially the same as or different from each other.

[0119] The plurality of first sub pad groups G2-R may be disposed to be arranged outward from a central portion of the pad area PA. Inclinations of the second pads PD2 of the first sub pad groups G2-R may be different from each other.

[0120] The inclination of the second pad PD2 of the first sub-pad group G2-R may gradually increase from the central portion of the pad area PA-1. In addition, the inclination of the second pad PD2 of the second sub-pad group G2-L may gradually increase from the central portion of the pad area PA.

[0121] In other words, in the display panel DP-1, multiple pad groups PDG can be arranged in a fan shape, the inclination of the pads of the pad group PDG can gradually increase from the central part to the outside, and the pad spacing can gradually decrease from the central part to the outside, thereby minimizing the pad area PA-1 and reducing the invalid area.

[0122] refer to Fig.11 , the display panel DP-1 may include a first connection line CL1 connected to the first pad group G1 and a second connection line CL2 connected to the second pad groups G2-R and G2-L. The second connection line CL2 may include a third sub-line portion SL3 extending in a direction from the display area DA to the pad area PA-1 and a fourth sub-line portion SL4 extending from the third sub-line portion SL3 to be connected to the second pad PD2. In the display panel DP-1, the fourth sub-line portion SL4 may include at least one bent portion CP. The fourth sub-line portion SL4 may include a lower sub-line portion SL4-1 connected to the second pad PD2 and an upper sub-line portion SL4-2 disposed between the third sub-line portion SL3 and the lower sub-line portion SL4-1. In an exemplary embodiment, the extension direction of the lower sub-line portion SL4-1 may be parallel to the extension direction of the second pad PD2 of the first sub-pad group G2-Rn or the second sub-pad group G2-Ln.

[0123] Fig.13 is a plan view of a display panel constructed according to another exemplary embodiment of the present invention. Fig.14 It shows that according to Fig.13 A detailed plan view of a portion of a pad area of ​​a display panel constructed in accordance with an exemplary embodiment shown in FIG. Fig.13 and Fig.14 In the description of Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Fig. 7A , Figure 7B , Figure 7C , Figure 8 , Fig. 9 , Fig.10 The contents of the display panel DP described herein overlap, and therefore, their differences will be mainly described. Fig.13 and Fig.14 In the description of the display panel DP-2, except for the pad area PA-2, the pad group PDG and the connection line CL, the reference DP-2 may be equally applied. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Fig. 7A , Figure 7B , Figure 7C , Figure 8 , Fig. 9 , Fig.10 The content of the description.

[0124] The display panel DP-2 may include a display substrate PS, a plurality of pad groups PDG, and connection lines CL. The display substrate PS may include a display area DA, a non-display area NDA, and a pad area PA-2, and the pad area PA-2 may be disposed on at least one side of the display area DA.

[0125] In the display panel DP-2, each of the first pad PD1 and the second pad PD2 may have a rectangular shape on a plane. In other words, each of the first pad PD1 of the first pad group G1 and the second pad PD2 of the second pad groups G2-R and G2-L may have a rectangular shape on a plane defined by the first direction axis DR1 and the second direction axis DR2.

[0126] Each of the first pads PD1 of the first pad group G1 may have a rectangular shape including a first length L1 and a first width W1, and each of the second pads PD2 of the second pad groups G2-R and G2-L may have a rectangular shape including a second length L2 different from the first length L1 and a second width W2 different from the first width W1.

[0127] In an exemplary embodiment, the plurality of pad groups PDG may include a first pad group G1 disposed at a central portion of the pad area PA-2 and second pad groups G2-R and G2-L disposed on at least one side of the first pad group G1. The inclination of each of the second pads PD2 of the second pad groups G2-R and G2-L may be greater than the inclination of each of the first pads PD1 of the first pad group G1. In addition, the spacing between the second pads PD2 may be smaller than the spacing between the first pads PD1.

[0128] A plurality of first sub-pad groups G2-R may be arranged outward from a central portion of the pad area PA-2. The inclinations and spacings of the second pads PD2 of the first sub-pad groups G2-R may be different from each other. In addition, the lengths and widths of the second pads PD2 of the first sub-pad groups G2-R may be different from each other. In addition, the second pads PD2 of the same first sub-pad group G2-R may have substantially the same length and width.

[0129] The inclination of the second pads PD2 of the first sub-pad group G2-R may gradually increase from the central portion of the pad area PA-2 outward, and the spacing between the second pads PD2 of the first sub-pad group G2-R may gradually decrease from the central portion of the pad area PA-2 outward. In addition, the length of the second pads PD2 of the first sub-pad group G2-R may gradually increase from the central portion of the pad area PA-2 outward, and the width of the second pads PD2 of the first sub-pad group G2-R may gradually decrease from the central portion of the pad area PA-2 outward.

[0130] A plurality of second sub-pad groups G2-L may be arranged to be arranged outward from the central portion of the pad area PA-2. The inclinations and spacings of the second pads PD2 of the second sub-pad groups G2-L may be different from each other. In addition, the lengths and widths of the second pads PD2 of the second sub-pad groups G2-L may be different from each other. In addition, the second pads PD2 of the same second sub-pad group G2-L may have substantially the same length and width.

[0131] The inclination of the second pads PD2 of the second sub-pad group G2-L may gradually increase from the central portion of the pad area PA-2 outward, and the spacing between the second pads PD2 of the second sub-pad group G2-L may gradually decrease from the central portion of the pad area PA-2 outward. In addition, the length of the second pads PD2 of the second sub-pad group G2-L may gradually increase from the central portion of the pad area PA-2 outward, and the width of the second pads PD2 of the second sub-pad group G2-L may gradually decrease from the central portion of the pad area PA-2 outward.

[0132] The first pads PD1 of the first pad group G1 and the second pads PD2 of the second pad groups G2-R and G2-L may have substantially the same surface area. In other words, the first pads PD1 and the second pads PD2 may have different lengths and widths and substantially the same surface area.

[0133] exist Fig.13 and Fig.14 In the display panel DP-2, the first virtual line IL1 connecting the ends of the pads PD1 and PD2 on one side adjacent to the display area DA to each other and the second virtual line IL2 connecting the ends of the pads PD1 and PD2 on the other side adjacent to the edge ED of the display substrate PS may be substantially parallel to each other. In other words, the first virtual line IL1 and the second virtual line IL2 may be substantially parallel to the edge ED of the display substrate PS.

[0134] The first virtual line IL1 may be a line connecting the uppermost ends of the first pad PD1 and the second pad PD2 to each other on a plane, and the second virtual line IL2 may be a line connecting the lowermost ends of the first pad PD1 and the second pad PD2 to each other on a plane. Fig.14, the distance d between the first virtual line IL1 and the second virtual line IL2 may be the vertical length of each of the pads PD1 and PD2. Fig.13 and Fig.14 In the exemplary embodiment shown in , vertical lengths of the pads PD1 and PD2 of the plurality of pad groups PDG may be substantially the same.

[0135] Fig.15 and Fig.16 are graphs respectively showing the pad length and the pad width for each pad group in the display panel DP-2. Fig.15 is a graph showing the pad length for each of the first pad group G1 and the second pad groups G2-R and G2-L in the display panel DP-2, and Fig.16 is a graph showing a pad width for each of the first pad group G1 and the second pad groups G2-R and G2-L in the display panel DP-2.

[0136] refer to Fig.15 , in the display panel DP-2, each of the pads of the first pad group G1 may have the shortest length, and the pads of the first sub-pad group G2-R disposed on one side of the first pad group G1 may have a length that gradually increases as they are spaced apart from the first pad group G1. In addition, the pads of the second sub-pad group G2-L disposed on the other side of the first pad group G1 may have a length that gradually increases as they are spaced apart from the first pad group G1. The first sub-pad group G2-R and the second sub-pad group G2-L, which are arranged substantially symmetrically to each other with respect to the first pad group G1, may have substantially the same length.

[0137] refer to Fig.16 In the display panel DP-2, among the plurality of pads disposed on the pad area PA-2, each of the pads of the first pad group G1 may have the largest width, and the pads of the first sub-pad group G2-R disposed on one side of the first pad group G1 may have a width that gradually decreases as they are spaced apart from the first pad group G1. In addition, the pads of the second sub-pad group G2-L disposed on the other side of the first pad group G1 may have a width that gradually decreases as they are spaced apart from the first pad group G1. The first sub-pad group G2-R and the second sub-pad group G2-L, which are arranged substantially symmetrically with respect to the first pad group G1, may have substantially the same width.

[0138] In other words, reference Fig.13 , Fig.14 , Fig.15 and Fig.16, the display panel DP-2 may include a plurality of pad groups PDG arranged in the first direction DR1, and pads of different pad groups may have different lengths and widths. A plurality of pads of one pad group may have substantially the same length and width. In other words, the display panel DP-2 may include pads having different lengths and different widths for each group and having substantially the same surface area to facilitate adhesion to a connection member (see FIG. 1 ) to be described later. Fig.17 Reference symbol AF), and the display panel DP-2 can provide pads with similar resistance values, thereby achieving good reliability and electrical performance.

[0139] In addition, in the display panel DP-2, the pads of different pad groups may have different inclinations and different spacings. The inclinations and spacings of the plurality of pads of one pad group may be substantially the same. In other words, since different inclination values ​​are provided for each pad group and different spacings are provided for each pad group, the plurality of pad groups PDG may be arranged while minimizing the ineffective area on the pad area PA-2.

[0140] In an exemplary embodiment, a display device including the display panel according to the aforementioned embodiment will be described. Fig.17 is an exploded perspective view of a portion of a display device constructed according to an exemplary embodiment. Fig.17 The exploded perspective view of the display device may involve Figure 1 Display device. Fig.17 , the display device DD may include a display panel DP and a connecting circuit board FB.

[0141] The display panel DP may include a display area DA and a pad area PA. The display area DA may be an area on which an image is displayed and may include a plurality of pixels. The pad area PA may be disposed on at least one side of the display area DA. Figure 1 and Fig.17 The middle pad area PA is disposed only on one side of the display area DA, but exemplary embodiments are not limited thereto. For example, the pad area PA may be additionally disposed outside the display area DA.

[0142] The display panel DP may include a plurality of pad groups PDG. The pad groups PDG may be disposed on the pad area PA and may be arranged in the first direction DR1. The pad group PDG may include a first pad group G1 and second pad groups G2-R and G2-L, wherein the first pad group G1 has a first inclination relative to the reference line RL and includes a plurality of first pads PD1 spaced apart from each other by a first distance, and the second pad groups G2-R and G2-L have a second inclination relative to the reference line RL and include a plurality of second pads PD2 spaced apart from each other by a second distance.

[0143] With reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Fig. 7A , Figure 7B , Figure 7C , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 , Fig.14 , Fig.15 , Fig.16 The same contents as described may be applied to the display panel DP and the pad group PDG of the display panel DP. In other words, the display device DD may include the display panels DP, DP-1, and DP-2 according to the aforementioned embodiments.

[0144] The display device DD may include a connection circuit board FB, and the connection circuit board FB may include a plurality of connection pad groups CPG. The connection circuit board FB may include a flexible board BF and a plurality of connection pad groups CPG disposed on the flexible board BF.

[0145] The flexible board BF may be made of a flexible material such as polyimide. The flexible board BF may be provided in the form of a film. The connection pads CD1 and CD2 of the connection pad group CPG provided on the flexible board BF may be output pads or input pads.

[0146] The connection pad group CPG may include a first connection pad group CPG1 disposed corresponding to the first pad group G1 of the display panel DP and second connection pad groups CPG-R and CPG-L disposed corresponding to the second pad groups G2-R and G2-L of the display panel DP.

[0147] The connection pad group CPG may be arranged in a first direction DR1. The connection pad group CPG may be arranged corresponding to the pad group PDG. The connection pad group CPG may include a first connection pad group CPG1 and second connection pad groups CPG-R and CPG-L, wherein the first connection pad group CPG1 has a first inclination relative to the reference line RL and includes a plurality of first connection pads CD1 spaced apart from each other by a first distance, and the second connection pad groups CPG-R and CPG-L have a second inclination relative to the reference line RL and include a plurality of second connection pads CD2 spaced apart from each other by a second distance. The inclination of each of the connection pads CD1 and CD2 may represent an angle between an extension direction of the reference line RL and an extension direction of the first connection pad CD1 or the second connection pad CD2. In this specification, the value of the inclination may be a positive value and may represent an acute angle. The first connection pad CD1 may face the corresponding first pad PD1, and the second connection pad CD2 may face the corresponding second pad PD2.

[0148] In an exemplary embodiment, the plurality of connection pad groups CPG may include a first connection pad group CPG1 disposed at a central portion of the flexible board BF and second connection pad groups CPG-R and CPG-L disposed on at least one side of the first connection pad group CPG1. The inclination of each of the second connection pads CD2 of the second connection pad groups CPG-R and CPG-L may be greater than the inclination of each of the first connection pads CD1 of the first connection pad group CPG1. In addition, the spacing between the second connection pads CD2 may be smaller than the spacing between the first connection pads CD1.

[0149] The second connection pad groups CPG-R and CPG-L may include a first sub connection pad group CPG-R disposed on one side of the first connection pad group CPG1 and a second sub connection pad group CPG-L disposed on the other side of the first connection pad group CPG1. For example, in the display device DD, the first sub connection pad group CPG-R may be disposed corresponding to the first sub pad group G2-R, and the second sub connection pad group CPG-L may be disposed corresponding to the second sub pad group G2-L.

[0150] The inclinations of the second connection pads CD2 of the first sub-connection pad group CPG-R may be different from each other. The inclination of the second connection pads CD2 of the first sub-connection pad group CPG-R may gradually increase from the central portion of the flexible board BF outward. The second connection pads CD2 of the first sub-connection pad group CPG-R may be arranged corresponding to the second pads PD2 of the first sub-pad group G2-R.

[0151] In addition, the inclinations of the second connection pads CD2 of the second sub-connection pad group CPG-L may be different from each other. The inclination of the second connection pads CD2 of the second sub-connection pad group CPG-L may gradually increase from the central portion of the flexible board BF outward. The second connection pads CD2 of the second sub-connection pad group CPG-L may be arranged corresponding to the second pads PD2 of the second sub-pad group G2-L.

[0152] The display device DD may further include a connection member AF disposed between the display panel DP and the connection circuit board FB. The connection member AF may electrically connect the pads PD1 and PD2 of the display panel DP to the connection pads CD1 and CD2 of the connection circuit board FB. The connection member AF may have electrical conductivity and adhesion. The connection member AF may include a thermosetting material or a photocurable material. For example, the connection member AF may include an anisotropic conductive film (ACF).

[0153] The display device may include a plurality of pad groups. The plurality of pads may be arranged such that the inclination of the pads of the pad group gradually increases outward from the central portion of the pad region and the spacing between the pads of the pad group gradually decreases outward from the central portion of the pad region. Therefore, the surface area of ​​the pad region may be reduced, and the ineffective area provided outside the display region may be minimized or reduced to realize a display device having various designs.

[0154] The display panel and the display device according to the exemplary embodiment may include a plurality of pad groups. The inclination and spacing of the pads of the pad group may be changed to optimize the layout of the pads. Therefore, when compared with a display panel having a constant inclination and spacing, even if the same number of pads are set, the pad area according to the exemplary embodiment of the present invention may still have a relatively reduced length and a relatively reduced invalid area. In addition, according to the display panel and the display device according to the exemplary embodiment, the inclination and spacing of the pads may be optimized to maintain a sufficient contact area with the connecting member, thereby achieving good reliability while reducing the invalid area.

[0155] Although certain exemplary embodiments and examples have been described herein, other embodiments and modifications will be apparent from this description. Therefore, the inventive concept is not limited to such embodiments, but rather lies in the broader scope of the appended claims and various obvious modifications and equivalent arrangements as will be apparent to those of ordinary skill in the art.

Claims

1. Display panel, include: A display substrate having a display area for displaying an image and a pad area disposed on at least one side of the display area; as well as A plurality of pad groups are arranged in the pad region in a first direction, and the plurality of pad groups include: a first pad group having a plurality of first pads, at least some of the plurality of first pads having a first inclination relative to a reference line extending in a second direction different from the first direction, and the plurality of first pads being spaced apart from each other at a first interval; and a second pad group, comprising a plurality of second pads, at least some of the plurality of second pads having a second inclination different from the first inclination relative to the reference line, at least some of the plurality of second pads extending parallel to each other, and the parallel-extending second pads among the plurality of second pads being spaced apart from each other at a second spacing different from the first spacing, Among them, one of the first reference line defined by connecting one end of each of the first pad and the second pad and the second reference line defined by connecting the other end of each of the first pad and the second pad is a curve, and the other is a straight line extending parallel to the edge of the display substrate.

2. The display panel according to claim 1, in, The first pad group is disposed on a central portion of the pad area, and The second pad group is disposed on at least one side of the first pad group.

3. The display panel according to claim 2, in, The second inclination is greater than the first inclination, and The second spacing is smaller than the first spacing.

4. The display panel according to claim 3, in, The second inclination is greater than 0 degree and less than or equal to 50 degrees.

5. The display panel according to claim 2, in, The second pad group includes: a plurality of first sub-pad groups disposed on one side of the first pad group; and A plurality of second sub-pad groups are arranged on the other side of the first pad group.

6. The display panel according to claim 5, in, Each of the first sub-pad group and the second sub-pad group includes the second pad, wherein the second inclinations of the second pads of the first sub-pad group are different from each other, and The second inclinations of the second pads of the second sub-pad group are different from each other.

7. The display panel according to claim 6, in, The second inclination of the second pad of the first sub-pad group increases outward from the central portion toward an end of the pad region in the first direction, and The second interval between the second pads of the first sub-pad group decreases outward from the central portion toward the end of the pad region in the first direction.

8. The display panel according to claim 6, in, The second inclination of the second pad of the second sub-pad group increases outward from the central portion toward an end of the pad region in the first direction, and The second interval between the second pads of the second sub-pad group decreases from the central portion outward toward the end of the pad region in the first direction.

9. The display panel according to claim 6, in, The second pad of the nth first sub-pad group from the first pad group in one direction and the second pad of the nth second sub-pad group from the first pad group in another direction are symmetrically arranged relative to the first pad group, wherein n is an integer greater than or equal to 1.

10. The display panel according to claim 1, in, The first reference line is defined adjacent to the display area, and the second reference line is defined adjacent to the edge of the display substrate.

11. The display panel according to claim 10, in, The first reference line is a curve protruding toward the display area, and The second reference line is a straight line parallel to the edge of the display substrate.

12. The display panel according to claim 10, in, The first reference line is a straight line extending parallel to the edge of the display substrate, and The second reference line is a curved line that protrudes toward the edge of the display substrate.

13. Display devices, include: The display panel according to any one of claims 1 to 12; as well as The connecting circuit board includes a plurality of connecting pad groups that can be connected to the plurality of pad groups.

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