Display panel and display device

Abstract

The utility model discloses a display panel and a display device. The display panel is provided with a touch area and a frame area arranged on at least one side of the touch area. The display panel comprises a first touch electrode layer, a second touch electrode layer and an isolation layer between the first touch electrode layer and the second touch electrode layer. The touch area comprises a plurality of first touch electrodes. The frame area comprises a plurality of first touch electrode wires, and the first touch electrode wires are correspondingly connected with the first touch electrodes. Via hole spaces are arranged between at least part of the first touch electrode wires, and part of the first touch electrode wires adjacent to the via hole spaces are provided with expansion parts extending to the via hole spaces. The expansion part is provided with a via hole for connecting the first touch electrode wires located on the first touch electrode layer and the second touch electrode layer. According to the touch panel, the connection performance of the first touch electrode wires located on the first touch electrode layer and the second touch electrode layer is optimized, and the probability of touch failure and other problems is reduced.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a display panel and a display device. Background Technology

[0002] With the continuous development of flexible displays and touch technology, people have put forward higher requirements for the quality and performance of touch display panels and devices.

[0003] Touch display technology has been gradually applied to various types of display devices. Touch display panels have the function of direct manual touch operation, which is convenient to use and simple to interact with, and therefore favored by the market. In the process of manufacturing a touch display panel, multiple touch electrodes and first touch electrode traces are usually required. The arrangement of these traces and touch electrodes directly affects the performance of the touch panel.

[0004] In related technologies, touch failures often occur due to problems in the connection between the first touch electrode layer and the second touch electrode layer. Utility Model Content

[0005] The purpose of this application is to provide a display panel and display device with good touch performance.

[0006] This application discloses a display panel having a touch area and a border area disposed on at least one side of the touch area. The display panel includes a first touch electrode layer, a second touch electrode layer, and an isolation layer between the first touch electrode layer and the second touch electrode layer.

[0007] The touch area includes a plurality of first touch electrodes;

[0008] The frame area includes a plurality of first touch electrode traces, which are correspondingly connected to a plurality of first touch electrodes. A portion of the plurality of first touch electrode traces are disposed on a first touch electrode layer, and another portion of the first touch electrode traces are disposed on a second touch electrode layer. At least a portion of the first touch electrode traces are provided with via spaces, and a portion of the first touch electrode traces adjacent to the via spaces are provided with extension portions extending into the via spaces. The extension portions are provided with vias to connect the first touch electrode traces located on the first touch electrode layer and the second touch electrode layer.

[0009] In an optional embodiment, a plurality of first touch electrode traces are arranged in a direction from close to the touch area to far away from the touch area, and the length and width of the first touch electrode traces close to the touch area are both smaller than those of the first touch electrode traces far away from the touch area;

[0010] When the width of the first touch electrode trace is less than or equal to 10 micrometers, a via space is provided between the first touch electrode trace and its adjacent first touch electrode trace.

[0011] In an optional embodiment, the display panel further includes a touch chip 400; a plurality of the first touch electrodes are arranged along the first direction;

[0012] The first touch electrode trace includes a first connection segment connected to the first touch electrode, a second connection segment connected to the touch chip 400, and a trace segment connecting the first connection segment and the second connection segment;

[0013] The extension section is located on the side of the wiring segment that is close to or far from the touch area.

[0014] In an optional embodiment, the trace segment includes a first trace segment extending along a first direction and a second trace segment extending along a second direction; the extension portion of the first touch electrode trace closest to the touch area is located on the side of the first trace segment and the second trace segment away from the touch area; the first direction and the second direction intersect.

[0015] In an optional embodiment, the trace segment includes a first trace segment extending along a first direction and a second trace segment extending along a second direction; the extension portion of the first touch electrode trace closest to the touch area from the second to the kth trace segment is located on the side of the first trace segment closest to the touch area, where k is an integer greater than 2.

[0016] In an alternative embodiment, the sum of the widths of the trace segment and the adjacent via space is greater than or equal to 12 micrometers.

[0017] In an optional embodiment, the first touch electrode trace adjacent to the via space is provided with a plurality of extension portions, and the spacing between adjacent extension portions is greater than or equal to 400 micrometers.

[0018] In an optional embodiment, the width of a portion of the first connection segment and the second connection segment is greater than or equal to 12 micrometers; both the first connection segment and the second connection segment are provided with vias to connect the first touch electrode traces located in the first touch electrode layer and the second touch electrode layer.

[0019] In an optional embodiment, the first connection segment includes a coupling segment connected to the first touch electrode and a bent segment connecting the coupling segment and the trace segment; the via is disposed in the coupling segment.

[0020] In one alternative embodiment, the length of the bend in the first touch electrode trace closer to the touch area is greater than the length of the bend in the first touch electrode trace farther from the touch area.

[0021] In an optional embodiment, when the width of the first touch electrode trace is greater than 10 micrometers, a via is provided on the first touch electrode trace to connect the first touch electrode trace located in the first touch electrode layer and the second touch electrode layer.

[0022] In an optional embodiment, the projection of the via in the thickness direction of the display panel overlaps with the projections of the extension portion and the trace segment in the thickness direction of the display panel.

[0023] In an optional embodiment, the via space corresponding to the (k+2)th touch electrode trace closest to the touch area is located on the side of the first connection segment of the (k+1)th touch electrode trace closest to the touch area away from the touch area.

[0024] This application also discloses a display device, which includes the display panel described above.

[0025] Compared with related technologies, this application allows the first touch electrode traces to be extended by setting via spaces. The extended portions are provided with vias to connect the first touch electrode traces located on the first touch electrode layer and the second touch electrode layer, thereby optimizing the connection performance of the first touch electrode traces located on the first touch electrode layer and the second touch electrode layer and reducing the probability of touch failure and other problems.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.

[0028] Figure 1 This is a schematic diagram of the structure of a display panel in related technologies.

[0029] Figure 2 This is a cross-sectional diagram of the via in the display panel.

[0030] Figure 3 This is a schematic diagram of the structure of a display panel in one embodiment of this application.

[0031] Figure 4 for Figure 3 A schematic diagram of the structure of region A in the middle.

[0032] Figure 5 for Figure 3 A schematic diagram of the structure of region B in the middle.

[0033] Figure 6 for Figure 3 A schematic diagram of the structure of region C in the middle.

[0034] Explanation of reference numerals in the attached drawings: Touch area, 1000; First touch electrode, 110; Second touch electrode, 120; Border area, 2000; Touch electrode trace, 200; First touch electrode trace, 210; First connecting segment, 211; Bending segment, 212; Coupling segment, 213; Second connecting segment, 214; Trace segment, 215; First trace segment, 216; Second trace segment, 217; Second touch electrode trace, 220; Via space, 230; Extension section, 240; Via, 250; Touch chip, 400; First touch electrode layer, 310; Isolation layer, 320; Second touch electrode layer, 330; Residual film, 340. Detailed Implementation

[0035] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0036] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0037] like Figure 1 as well as Figure 2 As shown, in related technologies, a touch display panel typically includes a touch area 1000 and a bezel area 2000 located on at least one side of the touch area 1000. Both the touch area 1000 and the bezel area 2000 include a first touch electrode layer 310, an isolation layer 320, and a second touch electrode layer 330, wherein the isolation layer 320 is configured to isolate the first touch electrode layer 310 and the second touch electrode layer 330.

[0038] The touch area 1000 typically has several first touch electrodes 110 and several second touch electrodes 120. The first touch electrodes 110 generally extend along a second direction F2, and the several first touch electrodes 110 are arranged along a first direction F1. The second touch electrodes 120 generally extend along the first direction F1, and the several second touch electrodes 120 are arranged along the second direction F2. The first direction F1 and the second direction F2 intersect. Specifically, the first direction F1 can be the length direction of the display panel, and the second direction F2 can be the width direction of the display panel. Alternatively, the first direction F1 can also be a direction deviating from the length direction of the display panel by a certain degree, and the second direction F2 can also be a direction deviating from the width direction of the display panel by a certain degree. In some foldable screen display devices, the first direction F1 can also be the width direction of the display panel, and the second direction F2 can also be the length direction of the display panel, etc.

[0039] The first touch electrode 110 can be disposed in one of the first touch electrode layer 310 and the second touch electrode layer 330, and the second touch electrode 120 can also be disposed in one of the first touch electrode layer 310 and the second touch electrode layer 330. At the intersection of the first touch electrode 110 and the second touch electrode 120, the first touch electrode 110 and the second touch electrode 120 are located in different film layers to form a touch capacitor. For example, the main body of the first touch electrode 110 and the second touch electrode 120 can both be disposed in the first touch electrode layer 310, and at the intersection, the first touch electrode 110 can be wound to the second touch electrode layer 330 to form a touch capacitor.

[0040] The border area 2000 is provided with a plurality of touch electrode traces 200. The plurality of touch electrode traces 200 may include a plurality of first touch electrode traces 210 connecting the first touch electrode 110 and the touch chip 400, and a plurality of second touch electrode traces 220 connecting the second touch electrode 120 and the touch chip 400.

[0041] A portion of the plurality of first touch electrode traces 210 is disposed on the first touch electrode layer 310, and another portion is disposed on the second touch electrode layer 330. A portion of the plurality of second touch electrode traces 220 is disposed on the first touch electrode layer 310, and another portion is disposed on the second touch electrode layer 330. The orthographic projections of the first touch electrode traces 210 disposed on the first touch electrode layer 310 and the first touch electrode traces 210 disposed on the second touch electrode layer 330 in the thickness direction of the display panel at least partially overlap. The orthographic projections of the second touch electrode traces 220 disposed on the first touch electrode layer 310 and the second touch electrode traces 220 disposed on the second touch electrode layer 330 in the thickness direction of the display panel at least partially overlap. In related technologies, the touch chip 400 is typically disposed at one end of the display panel along the first direction F1, making the routing of the first touch electrode traces 210 more complex than that of the second touch electrode traces 220. For example, since the distance between the first touch electrode 110 and the touch chip 400 varies at different locations, the lengths of the different first touch electrode traces 210 also vary. To balance the resistance of the first touch electrode traces 210 of different lengths, the longer first touch electrode traces 210 are made wider, and the shorter first touch electrode traces 210 are made narrower. Furthermore, vias 250 are provided on the first touch electrode traces 210 to connect the first touch electrode traces 210 located in the first touch electrode layer 310 and the second touch electrode layer 330, thereby increasing the conductivity of the first touch electrode traces 210.

[0042] In related technologies, during the setting of vias 250, some narrower first touch electrode traces 210 lack sufficient space to accommodate vias 250, resulting in poor conductivity of these traces and potentially causing touch failure. Furthermore, some vias 250 may contain residual film 340 of the insulating layer 320, especially when the insulating layer 320 is made of organic material, which further affects the conductivity of the first touch electrode traces 210.

[0043] like Figure 2 as well as Figure 3 As shown, in order to solve the above problems, this application provides a display panel having a touch area 1000 and a frame area 2000 disposed on at least one side of the touch area 1000. The display panel includes a first touch electrode layer 310, a second touch electrode layer 330 and an isolation layer 320 between the first touch electrode layer 310 and the second touch electrode layer 330.

[0044] The touch area 1000 includes a plurality of first touch electrodes 110. The border area 2000 includes a plurality of first touch electrode traces 210, which are correspondingly connected to the plurality of first touch electrodes 110. A portion of the plurality of first touch electrode traces 210 are disposed on the first touch electrode layer 310, and another portion of the first touch electrode traces 210 are disposed on the second touch electrode layer 330. At least a portion of the first touch electrode traces 210 are provided with via spaces 230, and a portion of the first touch electrode traces 210 adjacent to the via spaces 230 are provided with extension portions 240 extending into the via spaces 230. The extension portions 240 are provided with vias 250 to connect the first touch electrode traces 210 located on the first touch electrode layer 310 and the second touch electrode layer 330.

[0045] This application enables the first touch electrode trace to be extended by setting via space. The extended portion is provided with vias to connect the first touch electrode trace located on the first touch electrode layer and the second touch electrode layer, thereby optimizing the connection performance of the first touch electrode trace located on the first touch electrode layer and the second touch electrode layer and reducing the probability of touch failure and other problems.

[0046] The following will provide a detailed description of various embodiments of this application that conform to the above-described inventive concept.

[0047] like Figure 3 As shown, each first touch electrode 110 of the display panel is connected to a corresponding first touch electrode trace 210, and each second touch electrode 120 is connected to a corresponding second touch electrode trace 220. Figure 3 (For illustrative purposes only, only a portion of the connection structure is shown). In this embodiment, the left end of the first touch electrode 110 is connected to the corresponding first touch electrode trace 210. The first touch electrode trace 210 extends along the frame area 2000 and finally connects to the touch chip 400. Optionally, the touch chip 400 can be disposed on the lower side of the display panel. The first touch electrode trace 210 includes a first connection segment 211 connected to the first touch electrode 110, a second connection segment 214 connected to the touch chip 400, and a trace segment 215 connecting the first connection segment 211 and the second connection segment 214. Optionally, the trace segment 215 may include a first trace segment 216 extending along the first direction F1 and a second trace segment 217 extending along the second direction F2. The upper end of the first trace segment 216 is connected to the lower end of the first connection segment 211, and the lower end of the first trace segment 216 extends along the first direction F1 and connects to the left end of the second trace segment 217. The right end of the second routing segment 217 extends along the second direction F2 and connects to the second connecting segment 214.

[0048] like Figure 3 as well as Figure 4As shown, optionally, the width of a portion of the first connecting segment 211 and the second connecting segment 214 is greater than or equal to 12 micrometers. Both the first connecting segment 211 and the second connecting segment 214 are provided with vias 250 to connect the first touch electrode trace 210 located between the first touch electrode layer 310 and the second touch electrode layer 330. This can effectively improve the conductivity of the first touch electrode trace 210 and reduce the probability of touch failure and other problems. Optionally, the first connecting segment 211 may include a coupling segment 213 connected to the first touch electrode 110 and a bent segment 212 connecting the coupling segment 213 and the trace segment 215. The width of the coupling segment 213 can be greater than or equal to 12 micrometers, and the width of the bent segment 212 can be determined according to actual needs. The via 250 can be provided in the coupling segment 213. Optionally, the length of the bend 212 of the first touch electrode trace 210 near the touch area 1000 is greater than the length of the bend 212 of the first touch electrode trace 210 away from the touch area 1000. In this way, the resistance between different first touch electrode traces 210 can be further balanced, thereby improving the touch performance of the touch display panel.

[0049] Optionally, a plurality of first touch electrode traces 210 are arranged in a direction from near to far from the touch area 1000, and the length and width of the first touch electrode traces 210 near the touch area 1000 are both smaller than the length and width of the first touch electrode traces 210 far from the touch area. Specifically, the trace segments 215 of the plurality of first touch electrode traces 210 are arranged in a direction from near to far from the touch area 1000, and the length and width of the trace segments 215 near the touch area 1000 are both smaller than the length and width of the trace segments 215 far from the touch area.

[0050] When the width of the first touch electrode trace 210 is greater than 10 micrometers, a via 250 is provided on the first touch electrode trace 210 to connect the first touch electrode trace 210 located in the first touch electrode layer 310 and the second touch electrode layer 330. Specifically, when the width of the trace segment 215 of the first touch electrode trace 210 is greater than 10 micrometers, a via 250 is provided on the trace segment 215 to connect the first touch electrode trace 210 located in the first touch electrode layer 310 and the second touch electrode layer 330.

[0051] When the width of the first touch electrode trace 210 is less than or equal to 10 micrometers, the width of the trace itself is insufficient to support the via 250. Therefore, a via space 230 is provided between the first touch electrode trace 210 and its adjacent first touch electrode trace 210. Specifically, when the width of the trace segment 215 of the first touch electrode trace 210 is less than or equal to 10 micrometers, a via space 230 is provided between the trace segment 215 and its adjacent first touch electrode trace 210. Furthermore, the trace segment 215 is provided with an extension portion 240 extending into the via space 230, and the extension portion 240 is provided with a via 250 to connect the first touch electrode trace 210 located between the first touch electrode layer 310 and the second touch electrode layer 330. That is, the extension portion 240 is located on the side of the trace segment 215 that is closer to or farther from the touch area 1000. When the via 250 is provided in the extension portion 240, it can be completely provided in the extension portion 240, that is, the projection of the via 250 in the thickness direction of the display panel falls into the projection of the extension portion 240 in the thickness direction of the display panel. Alternatively, the via 250 can be provided in both the extension portion 240 and the trace segment 215, that is, the projection of the via 250 in the thickness direction of the display panel overlaps with the projections of both the extension portion 240 and the trace segment 215 in the thickness direction of the display panel. This allows full utilization of the original width of the trace segment 215, thereby reducing the space occupied by the extension portion 240 on the display panel.

[0052] In this way, all the first touch electrode traces 210 can be provided with vias 250 in the trace segment 215, which can simultaneously improve the conductivity of all the first touch electrode traces 210 and reduce the probability of touch panel failure and other problems.

[0053] like Figures 3 to 5 As shown, in an optional embodiment, the first touch electrode trace 210 connected to the first touch electrode 110 at the bottom of the display panel has the shortest trace length, and its trace segment 215 also has the narrowest width. From the bottom to the top of the display panel, the trace length of the first touch electrode trace 210 connected to the first touch electrode 110 gradually increases, and the width of the trace segment 215 also gradually increases.

[0054] like Figure 3 as well as Figure 5As shown, optionally, the extension portion 240 of the first touch electrode trace 210 closest to the touch area 1000 is located on the side of the first trace segment 216 and the second trace segment 217 away from the touch area 1000. Specifically, under normal conditions, the spacing between adjacent first touch electrode traces 210 is greater than or equal to 2 micrometers. In this embodiment, a via space 230 is provided between the first trace segment 216 and the second trace segment 217 of the first touch electrode trace 210 closest to the touch area 1000 and the first touch electrode trace 210 on the side away from the touch area 1000. Furthermore, the sum of the widths of the first trace segment 216 of the first touch electrode trace 210 closest to the touch area 1000 and the via space 230 is greater than or equal to 12 micrometers, and the sum of the widths of the second trace segment 217 of the first touch electrode trace 210 closest to the touch area 1000 and the via space 230 is greater than or equal to 12 micrometers. Thus, the first trace segment 216 or the second trace segment 217 can have sufficient via space 230 to provide the extension portion 240, and then the via 250. Optionally, the aperture of the via 250 is greater than or equal to 6 micrometers. Optionally, the first trace segment 216 or the second trace segment 217 is provided with a plurality of extension portions 240 extending into the via space 230, for example, the number of extension portions 240 can be 2, 3, 4, 5, etc. The spacing between adjacent extension portions 240 can be greater than or equal to 400 micrometers, which can effectively improve the conductivity of part of the first touch electrode trace 210.

[0055] like Figure 3 as well as Figure 6 As shown, optionally, the extension portion 240 of the first touch electrode trace 210 near the touch area 1000 from the second to the kth can be located on the side of the first trace segment 216 near the touch area 100, where k is an integer greater than 2.

[0056] Specifically, under normal conditions, the spacing between adjacent first touch electrode traces 210 is greater than or equal to 2 micrometers. In this embodiment, a via space 230 is provided on the side of the first trace segment 216 of the second to kth first touch electrode traces 210 near the touch area 1000, near the touch area 100. The sum of the widths of the first trace segment 216 and the via space 230 is greater than or equal to 12 micrometers. The second first touch electrode trace 210 near the touch area 1000 and the first first touch electrode trace 210 near the touch area 1000 share the same via space 230. The via space 230 corresponding to the first touch electrode trace 210 near the third touch area 1000 is located above the via space 230 corresponding to the first touch electrode trace 210 near the second touch area 1000. That is, when the first trace segment 216 of the first touch electrode trace 210 near the third touch area 1000 extends along the first direction F1 to the lower end of the first connecting segment 211, it bends to the right and connects with the lower end of the first connecting segment 211 to divide the two via spaces 230.

[0057] The via space 230 corresponding to the (k+2)th touch electrode trace 210 closest to the touch area 1000 is located above the via space 230 corresponding to the (k+1)th touch electrode trace 210 closest to the touch area 1000. That is, the first trace segment 216 of the (k+2)th touch electrode trace 210 closest to the touch area 1000 extends along the first direction F1 to the lower end of the first connecting segment 211, then bends to the right and connects to the lower end of the first connecting segment 211, thus dividing the area into two via spaces 230. These two via spaces 230 correspond to the (k+2)th touch electrode trace 210 closest to the touch area 1000 and the (k+1)th touch electrode trace 210 closest to the touch area 1000, respectively. That is, the via space 230 corresponding to the (k+2)th first touch electrode trace 210 closest to the touch area 1000 is located on the side of the first connecting segment 211 of the (k+1)th first touch electrode trace 210 closest to the touch area 1000 away from the touch area 1000. Each first trace segment 216 of the first touch electrode trace 210 can be provided with multiple extensions 240 extending into the via space 230. The spacing between adjacent extensions 240 can be greater than or equal to 400 micrometers, which can effectively improve the conductivity of some of the first touch electrode traces 210.

[0058] To solve the above-mentioned technical problems, this application provides a display device, which includes the above-mentioned display panel.

[0059] In one embodiment, the display device further includes a housing, and the display panel is disposed within the housing.

[0060] The display device provided in this application embodiment can be any device with display function, such as a mobile phone, tablet computer, television, laptop computer, or vehicle-mounted equipment.

[0061] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A display panel having a touch area and a border area disposed on at least one side of the touch area, characterized in that, The display panel includes a first touch electrode layer, a second touch electrode layer, and an isolation layer between the first touch electrode layer and the second touch electrode layer; The touch area includes a plurality of first touch electrodes; The frame area includes a plurality of first touch electrode traces, which are correspondingly connected to a plurality of first touch electrodes. A portion of the plurality of first touch electrode traces are disposed on a first touch electrode layer, and another portion of the first touch electrode traces are disposed on a second touch electrode layer. At least a portion of the first touch electrode traces are provided with via spaces, and a portion of the first touch electrode traces adjacent to the via spaces are provided with extension portions extending into the via spaces. The extension portions are provided with vias to connect the first touch electrode traces located on the first touch electrode layer and the second touch electrode layer.

2. The display panel according to claim 1, characterized in that, Multiple first touch electrode traces are arranged in a direction from close to the touch area to far away from the touch area, and the length and width of the first touch electrode traces close to the touch area are both smaller than those of the first touch electrode traces far away from the touch area; When the width of the first touch electrode trace is less than or equal to 10 micrometers, a via space is provided between the first touch electrode trace and its adjacent first touch electrode trace.

3. The display panel according to claim 1, characterized in that, The display panel further includes a touch chip; a plurality of the first touch electrodes are arranged along a first direction; The first touch electrode trace includes a first connection segment connected to the first touch electrode, a second connection segment connected to the touch chip, and a trace segment connecting the first connection segment and the second connection segment; The extension section is located on the side of the wiring segment that is close to or far from the touch area.

4. The display panel according to claim 3, characterized in that, The trace segment includes a first trace segment extending along a first direction and a second trace segment extending along a second direction; the extension portion of the first touch electrode trace closest to the touch area is located on the side of the first trace segment and the second trace segment away from the touch area; the first direction and the second direction intersect.

5. The display panel according to claim 4, characterized in that, The trace segment includes a first trace segment extending along a first direction and a second trace segment extending along a second direction; the extension portion of the first touch electrode trace that is close to the touch area from the second to the kth trace segment is located on the side of the first trace segment that is close to the touch area, where k is an integer greater than 2.

6. The display panel according to claim 3, characterized in that, The sum of the widths of the trace segment and the adjacent via space is greater than or equal to 12 micrometers.

7. The display panel according to claim 1, characterized in that, The first touch electrode trace adjacent to the via space is provided with a plurality of extension portions, and the spacing between adjacent extension portions is greater than or equal to 400 micrometers.

8. The display panel according to claim 3, characterized in that, The width of some of the first and second connecting segments is greater than or equal to 12 micrometers; both the first and second connecting segments are provided with vias to connect the first touch electrode traces located in the first touch electrode layer and the second touch electrode layer.

9. The display panel according to claim 8, characterized in that, The first connection segment includes a coupling segment connected to the first touch electrode and a bent segment connecting the coupling segment and the trace segment; the via is disposed in the coupling segment.

10. The display panel according to claim 9, characterized in that, The length of the bend in the first touch electrode trace that is closer to the touch area is greater than the length of the bend in the first touch electrode trace that is farther away from the touch area.

11. The display panel according to claim 2, characterized in that, When the width of the first touch electrode trace is greater than 10 micrometers, a via is provided on the first touch electrode trace to connect the first touch electrode trace located in the first touch electrode layer and the second touch electrode layer.

12. The display panel according to claim 3, characterized in that, The projection of the via in the thickness direction of the display panel overlaps with the projections of the extension portion and the trace segment in the thickness direction of the display panel.

13. The display panel according to claim 5, characterized in that, The via space corresponding to the (k+2)th touch electrode trace closest to the touch area is located on the side of the first connection segment of the (k+1)th touch electrode trace closest to the touch area away from the touch area.

14. A display device, characterized in that, The display device includes a display panel as described in any one of claims 1-13.

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