Display panel and display device

Abstract

Embodiments of the present application provide a display panel and a display device; the display panel makes the projection area of the touch insulating layer on the substrate smaller than the projection area of the first planarization layer on the substrate in at least part of the area of the line changing region and outside the projection area of the touch wire on the substrate, so that there is an area on the first planarization layer which is not covered by the touch insulating layer, and when water vapor invades from the first planarization layer, the water vapor can diffuse out from the area of the first planarization layer which is not covered by the touch insulating layer, thereby avoiding the water vapor invading between the touch wire and the connecting wire to cause film layer peeling in the line changing region, and improving the yield of the display panel.

Description

Technical Field

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

[0002] OLED (Organic Light-Emitting Diode) displays are widely used due to their advantages such as self-emission, wide color gamut, low power consumption, and the ability to achieve flexible displays. To reduce thickness, current OLED displays employ DOT (Direct On Cell Touch) technology to fabricate the touch layer. During the touch layer fabrication process, to prevent issues such as broken lines, the touch traces are tested. Specifically, test terminals are placed on the bottom bezel of the display panel and connected to the touch traces for testing. Since the touch traces need to pass through the bonding area, and the film layer of the touch traces differs from the metal layer of the bonding area, the touch traces in the display area need to be rerouted to the metal layer of the bonding area, and then from the metal layer of the bonding area to the touch traces in the terminal area. However, in actual use, it was found that moisture can easily enter from the organic layer and penetrate into the switching area between the touch traces and the metal layer, causing the touch traces to peel off from the metal layer and the metal layer to peel off from the touch insulation layer, resulting in display panel failure.

[0003] Therefore, existing display devices have a technical problem where moisture intrusion causes film peeling in the line-changing area, leading to display panel failure. Summary of the Invention

[0004] This application provides a display panel and a display device to solve the technical problem that existing display devices suffer from moisture intrusion, which leads to film peeling in the line switching area and consequently causes display panel failure.

[0005] To achieve the above objectives, according to a first aspect of this application, a display panel is provided, the display panel comprising:

[0006] Substrate;

[0007] A driving circuit layer is disposed on one side of the substrate. The driving circuit layer includes a connection trace layer and a first planarization layer. The first planarization layer is disposed on the side of the connection trace layer away from the substrate. The connection trace layer includes multiple connection traces, and the first planarization layer includes multiple first vias.

[0008] A touch layer is disposed on the side of the driving circuit layer away from the substrate, and the touch layer includes a touch insulating layer and touch traces;

[0009] The display panel includes a switching area, in which the touch trace passes through the first via and connects to the connection trace. In at least a portion of the switching area, outside the projection area of ​​the touch trace on the substrate, the projection area of ​​the touch insulating layer on the substrate is smaller than the projection area of ​​the first planarization layer on the substrate.

[0010] According to a second aspect of this application, a display device is provided, the display device including a display panel as described in any of the above embodiments.

[0011] This application provides a display panel and a display device. The display panel, in at least a portion of the switching area, outside the projection area of ​​the touch traces on the substrate, makes the projection area of ​​the touch insulating layer on the substrate smaller than the projection area of ​​the first planarization layer on the substrate. This results in areas on the first planarization layer not covered by the touch insulating layer, allowing moisture to diffuse out from these uncovered areas when moisture invades the first planarization layer. This prevents moisture from penetrating between the touch traces and the connection traces, which could cause film peeling in the switching area, thereby improving the yield of the display panel.

[0012] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0015] Figure 1 This is a schematic diagram of a comparison display device provided in an embodiment of this application.

[0016] Figure 2 This is a first planar schematic diagram of a display panel provided in an embodiment of this application.

[0017] Figure 3 This is a first cross-sectional schematic diagram of a display panel provided in an embodiment of this application.

[0018] Figure 4 This is a first stack-up diagram of the connecting wiring layer, the first planarization layer, the touch insulating layer, and the second touch electrode layer in the display panel provided in the embodiments of this application.

[0019] Figure 5 for Figure 4 An exploded view of the connection wiring layer of the display panel.

[0020] Figure 6 for Figure 4 An exploded view of the first planarization layer of the display panel.

[0021] Figure 7 for Figure 4 An exploded view of the touch insulating layer of the display panel.

[0022] Figure 8 for Figure 4 An exploded view of the second touch electrode layer of the display panel.

[0023] Figure 9 for Figure 4 A cross-sectional schematic diagram of the display panel.

[0024] Figure 10 This is a second stack-up diagram of the connecting wiring layer, the first planarization layer, the touch insulating layer, and the second touch electrode layer in the display panel provided in the embodiments of this application.

[0025] Figure 11 for Figure 10 An exploded view of the touch insulating layer of the display panel.

[0026] Figure 12 for Figure 10 A cross-sectional schematic diagram of the display panel.

[0027] Figure 13 This is a second planar schematic diagram of a display panel provided in an embodiment of this application.

[0028] Figure 14 This is a second cross-sectional schematic diagram of the display panel provided in an embodiment of this application. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0030] To illustrate the principle behind the technical problems in the embodiments of this application, some comparative display devices are provided. It should be understood that these comparative display devices are not considered prior art in the embodiments of this application. Figure 1As shown, the comparative display device includes a substrate 111, a non-conductive film 112, a metal film 113, an organic film 114, a touch insulating film 115, and a touch metal film 116. The touch metal film 116 includes touch traces. To test the touch electrodes, test terminals need to be set at the edge of the display panel, and the touch traces are connected to the test terminals. Since the test terminals and touch traces are located on both sides of the bending area, and the bending area uses the metal film 113 in the array layer to form the traces, the touch traces need to be switched to the metal film 113 within the display area, and after passing through the bending area, switched from the metal film 113 to the touch traces connected to the test terminals. Figure 1 As shown, after moisture invades from the organic film 114, because the organic film 114 is covered with a touch insulating film 115, the moisture cannot be released from the touch insulating film 115. Therefore, the moisture can only be released between the metal film 113 and the touch insulating film 115, and between the metal film 113 and the touch metal film 116, causing peeling between the metal film 113 and the touch insulating film 115, and between the metal film 113 and the touch metal film 116, resulting in display panel failure. Therefore, existing display devices have a technical problem where moisture intrusion causes film peeling in the line-changing area, leading to display panel failure.

[0031] This application provides a display panel and a display device to address the aforementioned technical problems.

[0032] Figure 2 This is a first planar schematic diagram of a display panel provided in an embodiment of this application. Figure 3 This is a first cross-sectional schematic diagram of a display panel provided in an embodiment of this application. Figure 4 This is a first stack-up diagram of the connecting wiring layer, the first planarization layer, the touch insulating layer, and the second touch electrode layer in the display panel provided in the embodiments of this application. Figure 5 for Figure 4 An exploded view of the connection wiring layer of the display panel. Figure 6 for Figure 4 An exploded view of the first planarization layer of the display panel. Figure 7 for Figure 4 An exploded view of the touch insulating layer of the display panel. Figure 8 for Figure 4 An exploded view of the second touch electrode layer of the display panel. Figure 9 for Figure 4 A cross-sectional schematic diagram of the display panel. Figure 10 This is a second stack-up diagram of the connecting wiring layer, the first planarization layer, the touch insulating layer, and the second touch electrode layer in the display panel provided in the embodiments of this application. Figure 11 for Figure 10 An exploded view of the touch insulating layer of the display panel. Figure 12 for Figure 10 A cross-sectional schematic diagram of the display panel. Figure 13 This is a second planar schematic diagram of a display panel provided in an embodiment of this application. Figure 14 This is a second cross-sectional schematic diagram of the display panel provided in an embodiment of this application.

[0033] like Figures 2 to 14 As shown in the figure, this application embodiment provides a display panel, which includes a substrate 31, a driving circuit layer 32, and a touch layer 35. The driving circuit layer 32 is disposed on one side of the substrate 31 and includes a connection wiring layer 327 and a first planarization layer 328. The first planarization layer 328 is disposed on the side of the connection wiring layer 327 away from the substrate 31. The connection wiring layer 327 includes multiple connection lines 23, and the first planarization layer 328 includes multiple first vias 328a. The touch layer 35 is disposed on the side of the driving circuit layer 32 away from the substrate 31 and includes a touch insulating layer 351 and touch lines 22. The touch lines 22 pass through the first vias 328a and are connected to the connection lines 23.

[0034] The display panel 2 includes a line-changing area 205. The touch trace 22 passes through the first via 328a and is connected to the connection trace 23 within the line-changing area 205. In at least a portion of the line-changing area 205, outside the projection area of ​​the touch trace 22 on the substrate 31, the projection area of ​​the touch insulating layer 351 on the substrate 31 is smaller than the projection area of ​​the first planarization layer 328 on the substrate 31.

[0035] This application provides a display panel 2. In at least a portion of the line-changing area, outside the projection area of ​​the touch trace 22 on the substrate 31, the projection area of ​​the touch insulating layer 351 on the substrate 31 is smaller than the projection area of ​​the first planarization layer 328 on the substrate 31. This results in areas on the first planarization layer 328 that are not covered by the touch insulating layer. Consequently, when moisture invades from the first planarization layer 328, the moisture can diffuse out from the areas of the first planarization layer 328 that are not covered by the touch insulating layer, preventing moisture from invading between the touch trace and the connection trace and causing film peeling in the line-changing area, thereby improving the yield of the display panel.

[0036] Specifically, such as Figure 2 , Figure 13 As shown, the display panel 2 includes a display area 201 and a non-display area 202. The non-display area 202 can be located on one side, two sides, three sides, or around the perimeter of the display area 201. The non-display area 202 can be located on the front or back of the display panel 2. The non-display area 202 includes a left border area and a right border area located on both sides of the display area 201. Figure 2 In the middle, the second touch trace 222 can extend along the second direction Y in the left and right frame areas and connect to the second touch electrode 212. Figure 13 In the middle, the touch trace 22 can extend along the second direction Y in the left and right frame areas and connect to the touch electrode 354a.

[0037] Specifically, such as Figure 2 , Figure 13 As shown, the non-display area 202 also includes a lower border area and an upper border area. The lower border area includes a bending area 202a and a terminal area 202b. A wiring can be set in the bending area 202a, and a test terminal 24 can be set in the terminal area 202b. Here, the test terminal 24 is a touch test terminal. Other test terminals are not limited here.

[0038] Specifically, the line-changing area 205 includes a first sub-area 203 and a second sub-area 204. The display panel 2 includes a display area 201 and a non-display area 202. The non-display area 202 includes a bending area 202a and a terminal area 202b. The terminal area 202b is located on the side of the bending area 202a away from the display area 201. The first sub-area 203 is located within the display area 201, and the second sub-area 204 is located within the terminal area 202b.

[0039] Specifically, regarding the division between display area 201 and non-display area 202, display area 201 necessarily includes pixels for display, and at the same time, display area 201 may include some non-display areas, for example, in Figure 2 In the above, the display area 201 includes a first sub-area 203 for setting up wiring, but the embodiments of this application are not limited to this, and the first sub-area 203 may also belong to the non-display area 202.

[0040] Specifically, in at least a portion of the line-changing region 205, outside the projection area of ​​the touch trace 22 on the substrate 31, the projection area of ​​the touch insulating layer 351 on the substrate 31 is smaller than the projection area of ​​the first planarization layer 328 on the substrate 31, including: in at least one of the first sub-region and the second sub-region, outside the projection area of ​​the touch trace 22 on the substrate 31, the projection area of ​​the touch insulating layer 351 on the substrate 31 is smaller than the projection area of ​​the first planarization layer 328 on the substrate 31.

[0041] Specifically, such as Figure 2 As shown, multiple first touch electrodes 211 located in the same column are connected by a connecting bridge 213. Multiple columns of first touch electrodes 211 are arranged along the first direction X. Multiple second touch electrodes 212 located in the same row are connected. Multiple rows of second touch electrodes 212 are arranged along the second direction Y. The angle between the first direction X and the second direction Y is greater than 0 and less than or equal to 90 degrees.

[0042] Specifically, such as Figure 2 As shown, the first touch electrode 211 is a driving electrode and the second touch electrode 212 is a sensing electrode; or the first touch electrode 211 is a sensing electrode and the second touch electrode 212 is a driving electrode.

[0043] Specifically, such as Figure 13 As shown, each touch electrode 354a is connected to each touch trace 22; Figure 13 and Figure 14 The following description uses an example where the touch layer includes a single touch electrode layer, and the single touch electrode layer forms both the touch electrode and the touch trace. In some embodiments, the description uses the example where the touch electrode and touch trace of a self-capacitive touch are located on the same layer. However, the embodiments of this application are not limited to this. The touch layer can include two touch electrode layers, one of which forms the touch electrode, and the other of which forms the touch trace, thereby realizing that the touch electrode and touch trace of a self-capacitive touch are located on different layers.

[0044] Specifically, such as Figures 2 to 14 As shown, after the touch trace 22 extends to the first sub-region 203, it needs to be connected to the connecting trace 23 for trace replacement. Then, it is routed through the connecting trace 23 in the bending area 202a. Then, in the second sub-region 204, the connecting trace 23 is connected to the touch trace 22 for trace replacement. Then, the touch trace 22 is routed on the side away from the second sub-region 204 and connected to the test terminal 24.

[0045] Specifically, a control transistor and control line can be set between the test terminal 24 and the touch trace 22 to prevent the test terminal from affecting the touch trace and touch electrode when no testing is required.

[0046] Specifically, such as Figures 2 to 14 As shown, in at least one of the first sub-region 203 and the second sub-region 204, since the projected area of ​​the touch insulating layer 351 on the substrate 31 is smaller than the projected area of ​​the first planarization layer 328 on the substrate 31, when water vapor enters from the first planarization layer 328, the water vapor can be released through the area of ​​the first planarization layer 328 not covered by the touch insulating layer 351. This avoids water vapor from accumulating between the touch insulating layer 351 and the connecting wiring layer 327 and between the connecting wiring layer 327 and the touch wiring 22, thus preventing film peeling in the wiring area and improving the yield of the display panel.

[0047] Specifically, within the first sub-region 203, outside the projection area of ​​the touch trace 22 on the substrate 31, the projected area of ​​the touch insulating layer 351 on the substrate 31 is smaller than the projected area of ​​the first planarization layer 328 on the substrate 31; or within the second sub-region 204, outside the projection area of ​​the touch trace 22 on the substrate 31, the projected area of ​​the touch insulating layer 351 on the substrate 31 is smaller than the projected area of ​​the first planarization layer 328 on the substrate 31; or within both the first sub-region 203 and the second sub-region 204, outside the projection area of ​​the touch trace 22 on the substrate 31, the projected area of ​​the touch insulating layer 351 on the substrate 31 is smaller than the projected area of ​​the first planarization layer 328 on the substrate 31. In some embodiments, such as Figures 3 to 14 As shown, in at least one of the first sub-region 203 and the second sub-region 204, the touch insulating layer 351 includes at least one second via 351c. In the first direction X, the projection of the boundary 351d of the second via 351c onto the substrate 31 is spaced from the projection of the touch trace 22 onto the substrate 31. By providing at least one second via in at least one of the first and second sub-regions, moisture in at least one of the first and second sub-regions can be released, thereby reducing the risk of film peeling in at least one of the first and second sub-regions and improving the yield of the display panel.

[0048] Specifically, in at least one of the first sub-region 203 and the second sub-region 204, the touch insulating layer 351 includes at least one second via 351c, meaning that in the first sub-region 203, the touch insulating layer 351 includes at least one second via 351c, i.e., in the first sub-region 203, the touch insulating layer 351 includes one or more second vias 351c; or in the second sub-region 204, the touch insulating layer 351 includes at least one second via 351c, i.e., in the second sub-region 204, the touch insulating layer 351 includes one or more second vias 351c; or in both the first sub-region 203 and the second sub-region 204, the touch insulating layer 351 includes at least one second via 351c, i.e., the touch insulating layer includes at least one second via 351c in the first sub-region 203 and at least one second via 351c in the second sub-region 204.

[0049] Specifically, along the first direction X, the boundary of the second via 351c refers to the left and / or right boundary of the second via 351c.

[0050] In some embodiments, such as Figure 3 , Figure 5 , Figure 6 , Figure 8 , Figures 10 to 12 , Figure 14 As shown, the touch layer 35 includes multiple touch traces 22, which are arranged along a first direction X and extend along a second direction Y.

[0051] Specifically, in at least one of the first sub-region 203 and the second sub-region 204, in the first direction X, the projection of one boundary of the second via 351c on the substrate 31 is located to the left of the projection of the first touch trace 22 on the substrate 31, and the projection of the other boundary of the second via 351c on the substrate 31 is located to the right of the projection of the last touch trace 22 on the substrate 31; the angle between the first direction X and the second direction Y is greater than 0 and less than or equal to 90 degrees.

[0052] Specifically, in at least one of the first sub-regions 203 and 204, in the first direction X, the projection of one boundary of the second via 351c onto the substrate 31 is located to the left of the projection of the first touch trace 22 onto the substrate 31, and the projection of the other boundary of the second via 351c onto the substrate 31 is located to the right of the projection of the last touch trace 22 onto the substrate 31. This allows the second via to traverse each touch trace, enabling water vapor to be released in the areas between each touch trace, thus improving the water vapor release effect and reducing the risk of film peeling in at least one of the first and second sub-regions, thereby improving the yield of the display panel.

[0053] Specifically, such as Figures 10 to 12 As shown, the explanation uses two touch traces 22 as an example (in reality, there are more than two touch traces). Figures 10 to 12 As can be seen, the left boundary of the second via 351c is located to the left of the first touch trace 22, and the right boundary of the second via 351c is located to the right of the second touch trace 22.

[0054] Specifically, such as Figure 10 As shown, Figure 10 The stack-up diagram showing the connection between the wiring layer 327, the first planarization layer 328, the touch insulating layer 351, and the second touch electrode layer 353 reveals the relative positions and coverage relationships of each layer. Figure 11 This is an exploded view of the touch insulating layer 351, showing the location of the second via 351c. Figure 10 Exploded views of the connection routing layer 327, the first planarization layer 328, and the second touch electrode layer 353 can be found in [reference 1]. Figure 5 , Figure 6 , Figure 8 .

[0055] Specifically, within at least one of the first sub-regions 203 and 204, in the first direction X, the projection of one boundary of the second via 351c onto the substrate 31 is located to the left of the projection of the first touch trace 22 onto the substrate 31, and the projection of the other boundary of the second via 351c onto the substrate 31 is located to the right of the projection of the last touch trace 22 onto the substrate 31. This means that within the first sub-region 203, in the first direction X, the projection of one boundary of the second via 351c onto the substrate 31 is located to the left of the projection of the first touch trace 22 onto the substrate 31, and the projection of the other boundary of the second via 351c onto the substrate 31 is located to the right of the projection of the last touch trace 22 onto the substrate 31; or within the second sub-region 204, in the first direction X, the projection of one boundary of the second via 351c onto the substrate 31 is located to the left of the projection of the first touch trace 22 onto the substrate 31, and the projection of the second via 351c onto the substrate 31 is located to the right of the projection of the last touch trace 22 onto the substrate 31. The projection of the other boundary of the second via 351c onto the substrate 31 is located to the right of the projection of the last touch trace 22 onto the substrate 31; or within the first sub-region 203, in the first direction X, the projection of one boundary of the second via 351c within the first sub-region 203 onto the substrate 31 is located to the left of the projection of the first touch trace 22 onto the substrate 31, and the projection of the other boundary of the second via 351c within the first sub-region 203 onto the substrate 31 is located to the right of the projection of the last touch trace 22 onto the substrate 31; within the second sub-region 204, in the first direction X, the projection of one boundary of the second via 351c within the second sub-region 204 onto the substrate 31 is located to the left of the projection of the first touch trace 22 onto the substrate 31, and the projection of the other boundary of the second via 351c within the second sub-region 204 onto the substrate 31 is located to the right of the projection of the last touch trace 22 onto the substrate 31.

[0056] In some embodiments, such as Figures 3 to 9 , Figure 14 As shown, the touch layer 35 includes multiple touch traces 22, which are arranged along a first direction X and extend along a second direction Y.

[0057] In at least one of the first sub-region 203 and the second sub-region 204, the touch insulating layer 351 includes a plurality of second vias 351c, each touch trace 22 is correspondingly disposed with each second via 351c, and there is a spacing between each second via 328a in the first direction X; the angle between the first direction X and the second direction Y is greater than 0 and less than or equal to 90 degrees.

[0058] Specifically, in at least one of the first sub-region 203 and the second sub-region 204, the touch insulating layer 351 includes a plurality of second vias 351c, each touch trace 22 is correspondingly disposed with each second via 351c, and there is a gap between each second via 328a in the first direction X, so that water vapor can be released in the area between each touch trace and the boundary of the second via, thereby improving the water vapor release effect, reducing the risk of film peeling in at least one of the first sub-region and the second sub-region, and improving the yield of the display panel.

[0059] Specifically, in at least one of the first sub-region 203 and the second sub-region 204, the touch insulating layer 351 includes a plurality of second vias 351c, meaning that the touch insulating layer 351 includes a plurality of second vias 351c in the first sub-region 203; or the touch insulating layer 351 includes a plurality of second vias 351c in the second sub-region 204; or the touch insulating layer 351 includes a plurality of second vias 351c in both the first sub-region 203 and the second sub-region 204.

[0060] Specifically, such as Figure 3 As shown, taking the touch layer 35 as an example, which includes a touch insulating layer 351, a first touch electrode layer 352, and a second touch electrode layer 353, and the touch insulating layer 351 as an example, which includes a first touch insulating layer 351a and a second touch insulating layer 351b, as follows... Figure 4 As shown, Figure 4 The stack-up diagram of the connecting trace layer 327, the first planarization layer 328, the touch insulating layer 351, and the second touch electrode layer 353 shows the relative positions and coverage relationships of each film layer; for example... Figure 5 As shown, Figure 5 for Figure 4 The exploded view of the connection routing layer 327 shows the structure of the connection routing 23 within the connection routing layer 327; as shown... Figure 6 As shown, Figure 6 for Figure 4 An exploded view of the first planarization layer 328 shows the structure of the first via 328a in the first planarization layer 328; as shown... Figure 7 As shown, Figure 7 for Figure 4 The exploded view of the touch insulating layer 351 shows the location of the second via 351c; as shown... Figure 8 As shown, Figure 8 for Figure 4 An exploded view of the second touch electrode layer 353 shows the structure of the touch traces 22 within the second touch electrode layer 353.

[0061] In some embodiments, such as Figure 4 , Figure 8 , Figure 10 As shown, the touch trace 22 includes a trace portion 353a and a transition portion 353b. The width L3 of the trace portion 353a is smaller than the width L4 of the transition portion 353b. The transition portion 353b is disposed within at least one of the first sub-region 203 and the second sub-region 204. By including the trace portion 353a and the transition portion 353b in the touch trace 22, with the width L3 of the trace portion 353a being smaller than the width L4 of the transition portion 353b, and the transition portion 353b being disposed within at least one of the first sub-region 203 and the second sub-region 204, the connection between the touch trace 22 and the connecting trace 23 can be achieved through the transition portion 353b, thereby improving the connection effect between the touch trace 22 and the connecting trace 23.

[0062] Specifically, the fact that the adapter 353b is disposed in at least one of the first sub-region 203 and the second sub-region 204 means that: the adapter 353b is disposed in the first sub-region 203; or the adapter 353b is disposed in the second sub-region 204; or the adapter 353b is disposed in both the first sub-region 203 and the second sub-region 204.

[0063] In some embodiments, such as Figure 4 , Figure 5 , Figure 10 As shown, the connection trace 23 includes a connection line portion 327a and a connection electrode portion 327b. The connection electrode portion 327b is disposed in at least one of the first sub-region 203 and the second sub-region 204. The connection electrode portion 327b is connected to the adapter portion 353b, and one connection electrode portion 327b is connected to at least two connection line portions 327a. By making the connection trace 23 include a connection line portion 327a and a connection electrode portion 327b, with the connection electrode portion 327b disposed in at least one of the first sub-region 203 and the second sub-region 204, the connection electrode portion connected to the adapter portion, and one connection electrode portion 327b connected to at least two connection line portions 327a, one trace portion can be connected to two connection line portions, avoiding abnormalities when the connection line portions are disconnected and improving the yield of the display panel.

[0064] Specifically, the connection electrode portion 327b being disposed in at least one of the first sub-region 203 and the second sub-region 204 means that: the connection electrode portion 327b is disposed in the first sub-region 203; or the connection electrode portion 327b is disposed in the second sub-region 204; or the connection electrode portion 327b is disposed in both the first sub-region 203 and the second sub-region 204.

[0065] Specifically, considering that the connecting line portion 327a in the connecting line 23 is located in the bending area, there may be a problem of the connecting line portion 327a breaking when bending in the bending area. Therefore, the two connecting line portions 327a can be connected to a connecting electrode portion 327b to improve the yield of the display panel.

[0066] Specifically, such as Figure 5 As shown, the width L2 of the connecting electrode portion 327b is greater than the width L1 of the connecting wire portion 327a.

[0067] Specifically, the width L2 of the connecting electrode portion 327b can be greater than the width L4 of the adapter portion 353b, and the width L3 of the wiring portion 353a can be greater than the width L1 of the connecting wire portion 327a.

[0068] In some embodiments, such as Figure 13 , Figure 14 As shown, the touch layer 35 includes a touch electrode layer 354, which includes a touch electrode 354a and a touch trace 22, and the touch trace 22 is connected to the touch electrode 354.

[0069] Specifically, when a touch electrode layer 354 is provided in the touch layer 35, touch electrodes 354a and touch traces 22 can be formed through the touch electrode layer 354. The design of the touch traces 22 in the first sub-region 203 and the second sub-region 204 can be referred to the above embodiment.

[0070] Specifically, when the touch layer consists of only one touch electrode layer, the design of the touch wiring in the first and second sub-regions of the touch electrode layer can be found in [reference needed]. Figures 4 to 12 .

[0071] Specifically, the materials of the touch electrode layer include one or more of titanium, aluminum, and copper in a stack.

[0072] In some embodiments, such as Figures 2 to 12 As shown, the touch layer 35 includes a first touch electrode layer 352 and a second touch electrode layer 353, and the touch insulating layer 351 includes a first touch insulating layer 351a and a second touch insulating layer 351b. The first touch insulating layer 351a is disposed between the driving circuit layer 32 and the first touch electrode layer 352, the first touch electrode layer 352 is disposed between the first touch insulating layer 351a and the second touch insulating layer 351b, and the second touch insulating layer 351b is disposed between the first touch electrode layer 352 and the second touch electrode layer 353.

[0073] The first touch electrode layer 352 includes a connecting bridge 213, and the second touch electrode layer 353 includes a first touch electrode 211, a second touch electrode 212, and a touch trace 22.

[0074] Specifically, when the touch layer 35 is provided with a first touch electrode layer 352 and a second touch electrode layer 353, touch traces 22 can be formed through the second touch electrode layer 353. The design of the touch traces 22 in the first sub-region 203 and the second sub-region 204 can be referred to the above embodiment.

[0075] Specifically, such as Figure 2 As shown, the touch trace 22 includes a first touch trace 221 and a second touch trace 222. The first touch trace 221 is connected to the first touch electrode 211, and the second touch trace 222 is connected to the second touch electrode 212. The design of at least one of the first touch trace 221 and the second touch trace 222 in the first sub-region 203 and the second sub-region 204 can refer to the design of the touch trace 22 in the above embodiment.

[0076] In some embodiments, such as Figure 3 , Figure 14 As shown, the driving circuit layer 32 further includes a source-drain layer 325 and a second planarization layer 326. The source-drain layer 325 is disposed between the second planarization layer 326 and the substrate 31, and the second planarization layer 326 is disposed between the source-drain layer 325 and the connection wiring layer 327.

[0077] Specifically, when the driving circuit layer 32 includes a source-drain layer 325 and a connection trace layer 327, the source-drain layer 325 can be used to form the source and drain, and the connection trace layer 327 can be used to form the connection trace.

[0078] In some embodiments, the connection trace layer further includes a source and a drain. When the driver circuit layer only has a connection trace layer, the connection trace layer can form a source, a drain, and a connection trace.

[0079] Specifically, the first planarization layer is made of organic materials, while the touch insulation layer is made of inorganic materials.

[0080] Specifically, the material of the first touch electrode layer includes one or more of titanium, aluminum, and copper in a stack; the material of the second touch electrode layer includes one or more of titanium, aluminum, and copper in a stack.

[0081] Specifically, when the touch insulation layer includes a first touch insulation layer and a second touch insulation layer, the touch insulation layer refers to these two touch insulation layers; when the touch insulation layer is a single layer, the touch insulation layer is this single touch insulation layer.

[0082] Specifically, the design of the first touch insulating layer and the second touch insulating layer in the first sub-region and the second sub-region can be the same or different. When the designs are the same, the design of the two can refer to the design of the touch insulating layer. When the designs are different, the vias of the two can have certain differences, but it is ensured that the projected area of ​​either the first touch insulating layer or the second touch insulating layer on the substrate is smaller than the projected area of ​​the first planarization layer on the substrate.

[0083] Specifically, in the above embodiments, both the first and second sub-areas of the display panel adopt... Figure 4 The design shown, or both the first and second sub-regions, adopt... Figure 11 The design shown is illustrated using an example, but the embodiments in this application are not limited to this. One of the first and second sub-areas of the display panel can be designed using... Figure 4 The design of the display panel uses another one in the first and second sub-areas. Figure 11 The design.

[0084] Specifically, a UV-curable adhesive can be applied to the touch insulation layer to improve its ability to block water and oxygen; when the touch insulation layer includes a first touch insulation layer and a second touch insulation layer, the UV-curable adhesive is applied to the second touch insulation layer.

[0085] like Figure 3 As shown, the driving circuit layer 32 includes an active layer 321, a gate insulating layer 322, a gate layer 323, an interlayer insulating layer 324, a source-drain layer 325, a second planarization layer 326, a connection wiring layer 327, and a first planarization layer 328; however, the embodiments of this application are not limited to this, and the design of this application can also be used for other driving circuit layers; for example, the driving circuit layer 32 may also include a buffer layer and / or a barrier layer, which may be disposed between the substrate 31 and the active layer 321; or, the driving circuit layer 32 may include two gate layers, one of which forms a gate to... And wiring, another forms capacitor plates and wiring, which correspondingly increases the gate insulating layer; or, the driving circuit layer 32 includes two active layers 321, the two active layers 321 are made of different materials, one is silicon semiconductor, such as low temperature polycrystalline silicon, and the other is oxide semiconductor, such as indium gallium zinc oxide, and correspondingly, multiple gates and gate insulating layers are provided; or, the driving circuit layer 32 may not have a source drain layer, and the connecting wiring layer is used as the source drain layer; or, the driving circuit layer 32 includes a first source drain layer, a second source drain layer and a connecting wiring layer, with the second source drain layer disposed between the first source drain layer and the connecting wiring layer.

[0086] like Figure 3As shown, the display panel 2 also includes a light-emitting functional layer 33, which includes a pixel electrode layer 331, a pixel definition layer 332, a light-emitting material layer 333, and a common electrode layer 334.

[0087] like Figure 3 As shown, the display panel 2 also includes an encapsulation layer 34.

[0088] Specifically, such as Figure 9 , Figure 12 As shown, Figure 9 for Figure 3 A first cross-sectional schematic diagram of at least one of the first sub-region 203 and the second sub-region 204 of the display panel. Figure 12 for Figure 3 A second cross-sectional schematic diagram of at least one of the first sub-region 203 and the second sub-region 204 of the display panel; from Figure 9 , Figure 12 As can be seen, in one of the first sub-region 203 and the second sub-region 204, the display panel 2 includes a substrate 31, a gate insulating layer 322, an interlayer insulating layer 324, a second planarization layer 326, a connection wiring layer 327, a first planarization layer 328, a touch insulating layer 351, and a second touch electrode layer 353, which are arranged sequentially. It can be understood that when the display panel 2 also includes insulating film layers such as a buffer layer, the buffer layer will also be disposed in the first sub-region 203 and the second sub-region 204. Similarly, the placement positions of other film layers can be determined.

[0089] Specifically, the above embodiments have described the display panel in detail from aspects such as the film layer and area design of the display panel. It is understood that when there is no conflict between the embodiments, the embodiments can be combined. For example, the touch layer includes multiple touch traces, which are arranged along a first direction and extend along a second direction; in at least one of the first sub-region and the second sub-region, the touch insulating layer includes multiple second vias, each touch trace is correspondingly arranged with each second via, and there is a spacing between each second via in the first direction; the angle between the first direction and the second direction is greater than 0 and less than or equal to 90 degrees, the touch layer includes a touch electrode layer, which includes touch electrodes and touch traces, and the touch traces are connected to the touch electrodes.

[0090] Meanwhile, this application provides a display device, which includes a display panel as described in any of the above embodiments.

[0091] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0092] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0093] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0094] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display panel, characterized in that, include: Substrate; A driving circuit layer is disposed on one side of the substrate. The driving circuit layer includes a connection trace layer and a first planarization layer. The first planarization layer is disposed on the side of the connection trace layer away from the substrate. The connection trace layer includes multiple connection traces, and the first planarization layer includes multiple first vias. A touch layer is disposed on the side of the driving circuit layer away from the substrate, and the touch layer includes a touch insulating layer and touch traces; The display panel includes a switching area, in which the touch trace passes through the first via and connects to the connection trace. In at least a portion of the switching area, outside the projection area of ​​the touch trace on the substrate, the projection area of ​​the touch insulating layer on the substrate is smaller than the projection area of ​​the first planarization layer on the substrate.

2. The display panel according to claim 1, characterized in that, The switching area includes a first sub-area and a second sub-area. The display panel includes a display area and a non-display area. The non-display area includes a bending area and a terminal area. The terminal area is located on the side of the bending area away from the display area. The first sub-area is located within the display area, and the second sub-area is located within the terminal area. In at least one of the first sub-region and the second sub-region, the touch insulating layer includes at least one second via, wherein, in a first direction, the projection of the boundary of the second via on the substrate is spaced from the projection of the touch trace on the substrate.

3. The display panel according to claim 2, characterized in that, The touch layer includes multiple touch traces, which are arranged along a first direction and extend along a second direction; Wherein, in at least one of the first sub-region and the second sub-region, in the first direction, the projection of one boundary of the second via on the substrate is located to the left of the projection of the first touch trace on the substrate, and the projection of the other boundary of the second via on the substrate is located to the right of the projection of the last touch trace on the substrate; the angle between the first direction and the second direction is greater than 0 and less than or equal to 90 degrees.

4. The display panel according to claim 2, characterized in that, The touch layer includes multiple touch traces, which are arranged along a first direction and extend along a second direction; In at least one of the first sub-region and the second sub-region, the touch insulating layer includes a plurality of second vias, each touch trace is disposed corresponding to each second via, and there is a spacing between each second via in the first direction; The angle between the first direction and the second direction is greater than 0 and less than or equal to 90 degrees.

5. The display panel according to any one of claims 2 to 4, characterized in that, The touch trace includes a trace portion and a transition portion. The width of the trace portion is smaller than the width of the transition portion. The transition portion is disposed in at least one of the first sub-area and the second sub-area.

6. The display panel according to claim 5, characterized in that, The connection trace includes a connection line portion and a connection electrode portion. The connection electrode portion is disposed in at least one of the first sub-region and the second sub-region. The connection electrode portion is connected to the adapter portion, and one connection electrode portion is connected to at least two connection line portions.

7. The display panel according to any one of claims 1 to 4, characterized in that, The touch layer includes a touch electrode layer, which includes touch electrodes and touch traces, and the touch traces are connected to the touch electrodes.

8. The display panel according to any one of claims 1 to 4, characterized in that, The touch layer includes a first touch electrode layer and a second touch electrode layer, and the touch insulating layer includes a first touch insulating layer and a second touch insulating layer. The first touch insulating layer is disposed between the driving circuit layer and the first touch electrode layer, the first touch electrode layer is disposed between the first touch insulating layer and the second touch insulating layer, and the second touch insulating layer is disposed between the first touch electrode layer and the second touch electrode layer. The first touch electrode layer includes a connecting bridge, and the second touch electrode layer includes a first touch electrode, a second touch electrode, and touch traces.

9. The display panel according to any one of claims 1 to 4, characterized in that, The driving circuit layer further includes a source-drain layer and a second planarization layer. The source-drain layer is disposed between the second planarization layer and the substrate, and the second planarization layer is disposed between the source-drain layer and the interconnection layer.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 9.

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