Display panel and display device

Abstract

The application provides a display panel and a display device. The display panel comprises a substrate and a signal trace arranged on the substrate. The substrate comprises a flat display area and a bending area surrounding the flat display area. The flat display area comprises a first side edge and a second side edge adjacent to each other. The bending area comprises a first bending area bent along the first side edge, a second bending area bent along the second side edge, and a corner area between the first bending area and the second bending area. The signal trace comprises a first trace and a bridge line connected to the first trace, the first trace is located in the first bending area, the bridge line is located in the corner area, and the elongation rate of the bridge line is greater than that of the first trace. The application can prevent the corner area from being wrinkled to cause the signal trace to be broken, and improve the yield of the display panel.

Description

Technical Field

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

[0002] To further improve the screen-to-body ratio of electronic devices, quad-curved products emerged. The cover plates of quad-curved products have curved sides on both the long and short sides. Traditional quad-curved products mainly feature large rounded corners, resulting in noticeable gaps in the four corner areas during display, and a significantly increased module bezel at the front viewing angle. To improve the overall display effect of quad-curved products, terminal manufacturers proposed a demand for "soapbox" type Gaussian quad-curved products, where the four corner areas are spherical. Each corner area has curvature changes in two directions, i.e., Gaussian curvature, hence the name "Gaussian surface." Due to its inherent characteristics, a sphere cannot be flattened into a plane, causing wrinkles to easily appear in the corner areas of the display panel when it is attached to a Gaussian surface, and signal lines are prone to breakage. Summary of the Invention

[0003] This application provides a display panel to solve the technical problem that wrinkles easily appear in the corner area and signal lines easily break when the display panel and cover plate of the four-curved product are bonded together in the prior art.

[0004] This application provides a display panel, which includes:

[0005] A substrate, the substrate including a planar display area and a bent area surrounding the planar display area, the planar display area including an adjacent first side and a second side, the bent area including a first bent area bent along the first side, a second bent area bent along the second side, and a corner area located between the first bent area and the second bent area; and

[0006] At least one signal trace is disposed on the substrate. The signal trace includes a first trace and a bridging wire connected to the first trace. The first trace is located in the first bend region, and the bridging wire is located in the corner region. The elongation of the bridging wire is greater than the elongation of the first trace.

[0007] Optionally, in this embodiment of the application, the bridging wire includes a first bridging wire connected to the first trace, a second bridging wire, and a third bridging wire connecting the first bridging wire and the second bridging wire, wherein the second bridging wire is connected to the first trace;

[0008] The first bridging wire is arranged parallel to the first side, and the second bridging wire is arranged parallel to the second side.

[0009] Optionally, in this embodiment of the application, the end of the first bridging wire near the second side has a first vertical distance from the second side, and the end of the second bridging wire near the first side has a second vertical distance from the first side.

[0010] Wherein, both the first vertical distance and the second vertical distance are greater than 0.2 mm, and the absolute value of the difference between the first vertical distance and the second vertical distance is less than 0.1 mm.

[0011] Optionally, in this embodiment, the signal trace further includes a second trace located in the second bend area, the second trace being connected to the first bridging wire, the first trace and the second trace being disposed on the same layer, and the first trace and the bridging wire being disposed on different layers.

[0012] Optionally, in this embodiment, the angle between the first trace and the second bridging wire is equal to the angle between the second trace and the first bridging wire.

[0013] Optionally, in this embodiment of the application, the display panel includes multiple signal traces, wherein multiple first bridge wires are arranged in parallel, multiple second bridge wires are arranged in parallel, and multiple third bridge wires are arranged in parallel.

[0014] Optionally, in this embodiment of the application, the display panel further includes a gate metal layer and a source / drain metal layer, wherein the gate metal layer is disposed on the substrate and the source / drain metal layer is disposed on the side of the gate metal layer away from the substrate;

[0015] The first trace and the second trace are both disposed on the same layer as the gate metal layer, and the bridging wire is disposed on the same layer as the source and drain metal layers. The first trace and the second trace are respectively connected to the bridging wire through corresponding first contact holes.

[0016] Optionally, in this embodiment, the display panel further includes an interlayer insulating layer disposed on the gate metal layer, the first source / drain metal layer being disposed on the side of the interlayer insulating layer away from the substrate, the interlayer insulating layer having a plurality of first contact holes, each first contact hole penetrating the interlayer insulating layer and extending to the side of the first trace or the second trace away from the substrate.

[0017] Optionally, in this embodiment of the application, the display panel further includes a gate metal layer, a capacitor metal layer, a first source / drain metal layer, and a second source / drain metal layer. The gate metal layer is disposed on the substrate, the capacitor metal layer is disposed on the side of the gate metal layer away from the substrate, the first source / drain metal layer is disposed on the side of the capacitor metal layer away from the substrate, and the second source / drain metal layer is disposed on the side of the first source / drain metal layer away from the substrate.

[0018] The first trace and the second trace are disposed on the same layer as the gate metal layer or the capacitor metal layer, and the bridging wire is disposed on the same layer as the first source-drain metal layer or the second source-drain metal layer. The first trace and the second trace are respectively connected to the bridging wire through corresponding second contact holes.

[0019] Optionally, in this embodiment, the display panel further includes an interlayer insulating layer disposed on the capacitor metal layer, a first planarization layer disposed on the interlayer insulating layer, the first planarization layer covering the first source / drain metal layer, and the second source / drain metal layer disposed on the side of the first planarization layer away from the substrate; the first planarization layer has a plurality of second contact holes, each second contact hole penetrating the first planarization layer and extending to the first trace or the side of the second trace away from the substrate.

[0020] Optionally, in this embodiment, the bridging wire is provided with at least one groove.

[0021] Optionally, in this embodiment, the bridging wire is provided with a plurality of grooves, the grooves penetrating the bridging wire, and the grooves are arranged in a straight line or in a chain on the bridging wire.

[0022] Optionally, in this embodiment, the display panel includes two signal traces spaced apart, one of which is a scan signal control trace and the other is a transmit signal control trace. The display panel also includes a first GOA circuit and a second GOA circuit disposed in the bending area. The first GOA circuit is connected to the scan signal control trace, and the second GOA circuit is connected to the transmit signal control trace.

[0023] Optionally, in this embodiment, the first GOA circuit is disposed in the first bending area and the second bending area, and the second GOA circuit is disposed in the first bending area and the second bending area.

[0024] Optionally, in this embodiment, the second GOA circuit is disposed on the side of the first GOA circuit away from the planar display area, the scan signal control trace is disposed between the first GOA circuit and the second GOA circuit, and the transmit signal control trace is disposed on the side of the second GOA circuit away from the planar display area.

[0025] Optionally, in this embodiment of the application, the display panel further includes a positioning mark, which is disposed in the corner area.

[0026] Optionally, in this embodiment of the application, the vertical distance between the positioning mark and the bridging wire is greater than 0.2 micrometers along the extending direction of the first side, and the vertical distance between the positioning mark and the bridging wire is greater than 0.2 micrometers along the extending direction of the second side.

[0027] Accordingly, this application also provides a display device, which includes a display panel and a cover plate, the cover plate being disposed on the display panel, and the display panel being any of the display panels described above.

[0028] This application provides a display panel and a display device. The display panel includes a substrate and at least one signal trace disposed on the substrate. The substrate includes a planar display area and a bent area surrounding the planar display area. The planar display area includes an adjacent first side and a second side. The bent area includes a first bent area bent along the first side, a second bent area bent along the second side, and a corner area located between the first bent area and the second bent area. The signal trace includes a first trace and a bridging wire connected to the first trace. The first trace is located in the first bent area, and the bridging wire is located in the corner area. The elongation of the bridging wire is greater than the elongation of the first trace. By configuring the signal trace as a connected first trace and bridging wire, since the bridging wire is located in the corner area and its elongation is greater than that of the first trace, the bending resistance of the signal trace in the corner area can be improved, preventing wrinkles in the corner area from causing signal trace breakage, thereby improving the yield of the display panel. Attached Figure Description

[0029] 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 accompanying 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.

[0030] Figure 1 This is a schematic diagram of the planar structure of the display panel provided in this application;

[0031] Figure 2 This application provides Figure 1A schematic diagram of the first enlarged structure at point Q;

[0032] Figure 3 This application provides Figure 2 A schematic diagram of the first cross-sectional structure at point AA';

[0033] Figure 4 This application provides Figure 2 Schematic diagram of the second cross-sectional structure at point AA';

[0034] Figure 5 This application provides Figure 2 A partial structural diagram of the middle bridge connection;

[0035] Figure 6 This application provides Figure 2 A schematic diagram of the second partial structure of the bridge connection;

[0036] Figure 7 This application provides Figure 1 A schematic diagram of the second enlarged structure at point Q;

[0037] Figure 8 This application provides Figure 1 A schematic diagram of the third enlarged structure at point Q;

[0038] Figure 9 This is a schematic diagram of a display device provided in this application. Detailed Implementation

[0039] 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 some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] In the description of this application, it should be understood that 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, features defined with "first" and "second," etc., may explicitly or implicitly include one or more of the stated features, and thus should not be construed as limiting this application.

[0041] This application provides a display panel and a display device, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application.

[0042] Please also refer to Figure 1 and Figure 2 . Figure 1This is a schematic diagram of the planar structure of the display panel provided in this application. Figure 2 This application provides Figure 1 A first enlarged structural schematic diagram at point Q. In this embodiment, the display panel 100 includes a substrate 21 and at least one signal trace 10.

[0043] The substrate 21 includes a planar display area 101 and a bent area 102 surrounding the planar display area 101. The planar display area 101 includes a first side 101a and a second side 101b adjacent to each other. The bent area 102 includes a first bent area 1021 bent along the first side 101a, a second bent area 1022 bent along the second side 101b, and a corner area 1023 located between the first bent area 1021 and the second bent area 1022.

[0044] The signal trace 10 is disposed on the substrate 21. The signal trace 10 includes a first trace 11 and a bridging wire 12 connected to the first trace 11. The first trace 11 is located in a first bend region 1021. The bridging wire 12 is located in a corner region 1023. The elongation of the bridging wire 12 is greater than the elongation of the first trace 11.

[0045] Since a portion of the signal trace 10 is located in the corner area 1023, this embodiment of the application sets the signal trace 10 as a connected first trace 11 and a bridging wire 12. The bridging wire 12 is located in the corner area 1023. Because the bridging wire 12 has a large elongation rate, it can improve the bending resistance of the signal trace 10 in the corner area 1023, thereby preventing wrinkles in the corner area 1023 from causing the bridging wire 12 to break, thus preventing the signal trace 10 from breaking and improving the yield of the display panel 100.

[0046] In this embodiment, the bending area 102 can be a non-display area. Of course, in some embodiments of this application, sub-pixels can also be set in the bending area 102. In this case, the bending area 102 can also display the image to achieve a full-screen display.

[0047] In this embodiment, the material of the first trace 11 can be molybdenum. The material of the bridging wire 12 can be a conductive material with high strength and high tensile strength, such as aluminum or titanium, to ensure the high elongation of the bridging wire 12. For example, the bridging wire 12 can be a stacked structure of aluminum / titanium / aluminum. Of course, in other embodiments of this application, the materials of the first trace 11 and the bridging wire 12 can be the same, and then the elongation of the bridging wire 12 can be improved by structural modifications. This application does not limit this approach.

[0048] In this embodiment, the bridging wire 12 includes a first bridging wire 121, a second bridging wire 122 connected to the first trace 11, and a third bridging wire 123 connecting the first bridging wire 121 and the second bridging wire 122. The first bridging wire 121 is arranged parallel to the first side 101a. The second bridging wire 122 is arranged parallel to the second side 101b.

[0049] It is understandable that the corner region 1023 exhibits curvature changes in two directions, i.e., Gaussian curvature. In related technologies, the traces in the corner region 1023 are susceptible to breakage due to the influence of Gaussian curvature.

[0050] In this embodiment, the first bridging wire 121 is parallel to the first side 101a, which reduces the impact of the curvature change at the second side 101b on the bending stress of the first bridging wire 121. This ensures that the first bridging wire 121 is only affected by a single curvature change, reducing the stress on the first bridging wire 121. Similarly, in this embodiment, the second bridging wire 122 is parallel to the second side 101b, which reduces the impact of the curvature change at the first side 101a on the bending stress of the second bridging wire 122, ensuring that the second bridging wire 122 is only affected by a single curvature change, thus reducing the stress on the second bridging wire 122. Therefore, this embodiment can reduce the overall stress on the bridging wire 12, preventing the bridging wire 12 from breaking at the corner area 1023.

[0051] In this embodiment, the first bridging wire 121 has a first vertical distance 'a' between its end near the second side 101b and the second side 101b. The second bridging wire 122 has a second vertical distance 'b' between its end near the first side 101a and the first side 101a. Both the first vertical distance 'a' and the second vertical distance 'b' are greater than 0.2 mm. The absolute value of the difference between the first vertical distance 'a' and the second vertical distance 'b' is less than 0.1 mm.

[0052] For example, the first vertical distance 'a' can be 0.2 mm, 0.3 mm, 0.5 mm, etc. The second vertical distance 'b' can be 0.2 mm, 0.3 mm, 0.5 mm, etc. The absolute value of the difference between the first vertical distance 'a' and the second vertical distance 'b' can be 0, 0.1 mm, 0.05 mm, etc. Furthermore, the lengths of the first bridging wire 121 and the second bridging wire 122 depend on the area of ​​the corner region 1023.

[0053] In this embodiment, since the third bridge wire 123 is located between the first bridge wire 121 and the second bridge wire 122, the third bridge wire 123 is closer to the planar display area 101. By setting both the first vertical distance a and the second vertical distance b to be greater than 0.2 mm, and the absolute value of the difference between the first vertical distance a and the second vertical distance b to be less than 0.1 mm, the third bridge wire 123 can be prevented from entering the planar display area 101 due to fitting deviation, while reducing the influence of Gaussian curvature on the third bridge wire 123.

[0054] In this embodiment, the signal trace 10 further includes a second trace 13. The second trace 13 is located in the second bend area 1022. The bridging wire 12 connects the first trace 11 and the second trace 13. The first trace 11 and the second trace 13 are disposed on the same layer. The first trace 11 and the bridging wire 12 are disposed on different layers.

[0055] It is understandable that, since the elongation of the bridging line 12 is greater than that of the first trace 11, the material of the bridging line 12 can be different from that of the first trace 11. This application implements a configuration where the first trace 11 and the bridging line 12 are in different layers, allowing the use of different materials to form different film layers, thereby forming the first trace 11, the bridging line 12, and the second trace 13. Furthermore, since the first trace 11 and the bridging line 12 are in different layers, the first trace 11, the bridging line 12, and the second trace 13 can also be formed using existing functional film layers in the display panel 100, thereby simplifying the manufacturing process and reducing the thickness of the display panel 100.

[0056] In one embodiment of this application, the included angle R1 between the first trace 11 and the second bridge wire 122 is equal to the included angle R2 between the second trace 13 and the first bridge wire 121.

[0057] For example, the angle R1 between the first trace 11 and the second bridge wire 122, and the angle R2 between the second trace 13 and the first bridge wire 121, are both 135 degrees. Since the first bridge wire 121 is parallel to the first side 101a, and the second bridge wire 122 is parallel to the second side 101b, the lengths of the first bridge wire 121 and the second bridge wire 122 are the same. In this case, the bending stress on the first bridge wire 121 and the second bridge wire 122 is almost equal, thereby reducing the overall probability of breakage of the signal trace 10.

[0058] For details, please refer to the following: Figures 1-3 , Figure 3 This application provides Figure 2 A schematic diagram of the first cross-sectional structure at point AA'. Along the light emission direction of the display panel 100, the display panel 100 includes a buffer layer 22, a first gate insulating layer 23, a gate metal layer 110, an interlayer insulating layer 25, and a first source / drain metal layer 120 stacked on the substrate 21.

[0059] The substrate 21 can be a flexible substrate capable of being bent, folded, or rolled. The substrate 21 may include one, two, or more flexible PI (Polyimide) layers. The substrate 21 may also be made of an insulating material such as a polymer resin. The substrate 21 primarily serves to support and protect the functional film layers, thereby improving the structural stability of the display panel 100. For example, in this embodiment, the substrate 21 includes a first PI layer 211, a first PB layer 212 (Polybutylene), a second PI layer 213, and a second PB layer 214 stacked together. However, this application is not limited to these specific layers.

[0060] The gate metal layer 110 mainly includes the gate of the transistor, scan lines, etc. The first source-drain metal layer 120 mainly includes the source of the transistor, the drain of the transistor, data lines, etc.

[0061] In this embodiment, both the first trace 11 and the second trace 13 are disposed on the same layer as the gate metal layer 110. The bridging wire 12 is disposed on the same layer as the first source / drain metal layer 120. A plurality of first contact holes 250 are provided in the interlayer insulating layer 25. Each first contact hole 250 penetrates the interlayer insulating layer 25 and extends to the side of the first trace 11 or the second trace 13 away from the substrate 21. Each first contact hole 250 exposes the surface of the first trace 11 or the second trace 13 away from the substrate 21. The first trace 11 and the second trace 13 are respectively connected to the bridging wire 12 through the corresponding first contact hole 250. Figure 3 The connection between the first trace 11 and the bridging wire 12 is only shown in the diagram, but it should not be construed as a limitation of this application.

[0062] This application embodiment simplifies the manufacturing process of the display panel 100 and reduces its thickness. Furthermore, since the gate metal layer 110 is typically formed using molybdenum-based traces that are not resistant to bending, wrinkles can easily occur in the corner area 1023 in actual products, leading to breakage of the signal trace 10 and causing image abnormalities. The first source / drain metal layer 120, on the other hand, is typically made of high-strength, high-tensile-rate materials such as aluminum or titanium. This application embodiment improves the bending resistance of the signal trace 10 by replacing the portion of the signal trace 10 located in the corner area 1023 with a bridging wire 12 on the same layer as the first source / drain metal layer 120 through a wire replacement.

[0063] Furthermore, in this embodiment, the display panel 100 further includes a second gate insulating layer 24 and a first planarization layer 26. The second gate insulating layer 24 is disposed on the side of the gate metal layer 110 away from the substrate 21. The second gate insulating layer 24 covers the gate metal layer 110. The first planarization layer 26 is disposed on the side of the first source / drain metal layer 120 away from the substrate 21. The first planarization layer 26 covers the first source / drain metal layer 120.

[0064] In some embodiments of this application, please also refer to Figure 3 and Figure 4 , Figure 4 This application provides Figure 2 A schematic diagram of the second cross-sectional structure at point AA'. (Compared to...) Figure 3 The difference in the cross-sectional structure of the display panel 100 is that, in this embodiment, the display panel 100 further includes a capacitor metal layer 111, a second source / drain metal layer 1200, and a second planarization layer 27.

[0065] The capacitor metal layer 111 is disposed between the second gate insulating layer 24 and the interlayer insulation 25. The capacitor metal layer 111 mainly includes one of the plates of a capacitor and can form a storage capacitor with the metal block in the gate metal layer 110. The second source / drain metal layer 1200 is disposed on the side of the first planarization layer 26 away from the substrate 21. The second planarization layer 27 is disposed on the side of the second source / drain metal layer 1200 away from the second source / drain metal layer 1200. The second planarization layer 27 covers the second source / drain metal layer 1200.

[0066] It is understood that in some embodiments of the display panel 100 of this application, in order to improve the resolution of the display panel 100, the size of the transistors needs to be reduced. To improve transistor performance and reduce impedance, a double-layer source-drain configuration can be used. That is, the second source-drain metal layer 1200 mainly includes the source and drain of the transistor. The source in the second source-drain metal layer 1200 is connected to the source in the first source-drain metal layer 120 through a contact hole. The drain in the second source-drain metal layer 1200 is connected to the drain in the first source-drain metal layer 120 through a contact hole.

[0067] In the display panel 100 with the above structure, the first trace 11 and the second trace 13 can be disposed on the same layer as the gate metal layer 110 or the capacitor metal layer 111. The bridging wire 12 can be disposed on the same layer as the first source-drain metal layer 120 or the second source-drain metal layer 1200.

[0068] Specifically, such as Figure 4As shown, the first trace 11 and the second trace 13 are disposed on the same layer as the capacitor metal layer 111. The bridging wire 12 is disposed on the same layer as the second source / drain metal layer 1200. A plurality of second contact holes 260 are provided in the first planarization layer 26. The second contact holes 260 penetrate the first planarization layer 26 and extend to the side of the first trace 11 or the second trace 13 away from the substrate 21. Each second contact hole 260 exposes the surface of the corresponding first trace 11 or the second trace 13 away from the substrate 21. The first trace 11 and the second trace 13 are respectively connected to the bridging wire 12 through the corresponding second contact hole 260. Figure 3 The connection between the first trace 11 and the bridging wire 12 is only shown in the diagram, but it should not be construed as a limitation of this application.

[0069] Please see Figure 5 , Figure 5 This application provides Figure 2 A partial structural diagram of the bridge connection. In this embodiment, the bridge connection 12 is provided with at least one groove 12a.

[0070] The groove 12a can be a through hole passing through the bridging wire 12. The groove 12a can also be an opening provided on the bridging wire 12. There can be one, two, or more grooves 12a, depending on the length and width of the bridging wire 12.

[0071] The planar structure of the groove 12a can be circular, trapezoidal, rhomboid, etc., and this application does not limit it.

[0072] In this embodiment, by providing a groove 12a on the bridging wire 12, the bridging wire 12 is effectively thinned, which can improve the tensile strength of the bridging wire 12. Furthermore, the groove 12a can release the stress generated when wrinkles occur in the corner area 1023, further preventing the bridging wire 12 from breaking.

[0073] In one embodiment of this application, the groove 12a is a through hole penetrating the bridging wire 12. Multiple grooves 12a are arranged in a straight line on the bridging wire 12. Specifically, the multiple grooves 12a are arranged at equal intervals on the bridging wire 12, which can further relieve the stress on the bridging wire 12 and improve its bending resistance.

[0074] Please see Figure 6 , Figure 6 This application provides Figure 2 A schematic diagram of the second partial structure of the bridge connection. In this embodiment, the groove 12a is a through hole penetrating the bridge connection 12. Multiple grooves 12a are arranged in a chain on the bridge connection 12.

[0075] The planar structure of the groove 12a can be elliptical or similar. By arranging them in a chain-like manner, the area of ​​the bridging wire 12 can be effectively utilized, increasing the number of grooves 12a, thereby further dispersing the stress on the bridging wire 12 and improving its bending resistance.

[0076] Please see Figure 1 and Figure 7 , Figure 7 This application provides Figure 1 A schematic diagram of the second enlarged structure at point Q.

[0077] In this embodiment, the display panel 100 includes two spaced signal traces 10, one of which is a scan signal control trace 11a, and the other is a transmit signal control trace 11b. The display panel 100 also includes a first GOA (Gate Driver On Array) circuit 20 and a second GOA circuit 30 disposed in the bending region 102. The first GOA circuit 20 is connected to the scan signal control trace 11a. The second GOA circuit 30 is connected to the transmit signal control trace 11b.

[0078] The structures of the scan signal control trace 11a and the transmit signal control trace 11b can be referred to the structure of the signal trace 10 in the above embodiments, and will not be repeated here.

[0079] The first GOA circuit 20 includes multiple cascaded first GOA units 201. The multiple cascaded first GOA units 201 can be disposed in predetermined areas of the corner region 1023, the first bend region 1021 and the second bend region 1022 along the curvature of the corner region 1023.

[0080] Each first GOA unit 201 is connected to the scan signal control line 11a. Each first GOA unit 201 can generate a scan signal in response to a scan control signal from the scan signal control line 11a, and can output the scan signal to the planar display area 101.

[0081] The second GOA circuit 30 includes multiple cascaded second GOA units 301. These multiple cascaded second GOA units 301 can be positioned along the curvature of the corner region 1023 within a predetermined area of ​​the corner region 1023, the first bend region 1021, and the second bend region 1022. The first GOA circuit 20 and the second GOA circuit 30 are spaced apart.

[0082] Each second GOA unit 301 is connected to the transmission signal control line 11b. Each second GOA unit 301 can generate a light emission signal in response to the transmission control signal from the transmission signal control line 11b, and can output the light emission signal to the flat panel display area 101.

[0083] Specifically, in one embodiment of this application, the second GOA circuit 30 is disposed on the side of the first GOA circuit 20 away from the flat panel display area 101. A scan signal control trace 11a is disposed between the first GOA circuit 20 and the second GOA circuit 30. A transmit signal control trace 11b is disposed on the side of the second GOA circuit 30 away from the flat panel display area 101.

[0084] Of course, in other embodiments of this application, the second GOA circuit 30 may be disposed on the side of the first GOA circuit 20 closer to the flat panel display area 101. The transmit signal control line 11b is disposed between the first GOA circuit 20 and the second GOA circuit 30. The scan signal control line 11a is disposed on the side of the first GOA circuit 20 away from the flat panel display area 101.

[0085] Alternatively, the second GOA circuit 30 may be located on the side of the first GOA circuit 20 away from the flat panel display area 101. Both the scan signal control line 11a and the transmit signal control line 11b may be located on the side of the second GOA circuit 30 away from the flat panel display area 101.

[0086] In one embodiment of this application, the first GOA circuit 20 and the second GOA circuit 30 are disposed in the first bending region 1021 and the second bending region 1022.

[0087] Since the signal traces 10 (scan signal control trace 11a and transmit signal control trace 11b) are irregularly arranged in the corner area 1023, placing the first GOA circuit 20 and the second GOA circuit 30 in the first bend area 1021 and the second bend area 1022 can avoid defects caused by insufficient wiring space for the first GOA circuit 20 and the second GOA circuit 30 in the corner area 1023. Furthermore, placing the first GOA circuit 20 and the second GOA circuit 30 in the first bend area 1021 and the second bend area 1022 can further avoid the Gaussian surface region, improving the wiring yield in the corner area 1023.

[0088] Furthermore, for the relevant scanning or emission signals that should be provided by the first GOA unit 201 or the second GOA unit 301 located in the corner area 1023, compensation can be performed by setting the first GOA unit 201 and the second GOA unit 301 in the first bending area 1021 and the second bending area 1022. Alternatively, compensation can be performed using signals from other areas.

[0089] Please continue reading. Figure 1In this embodiment, the planar display area 101 further includes a third side 101c and a fourth side 101d. The third side 101c is disposed opposite to the first side 101a. The fourth side 101d is disposed opposite to the second side 101b. The display panel 100 further includes a third bending area 1024, a fourth bending area 1025, a first corner area 1026, a second corner area 1027, and a third corner area 1028. The third bending area 1024 bends along the third side 101c. The fourth bending area 1025 bends along the fourth side 101d. The first corner area 1026 is located between the first bending area 1021 and the fourth bending area 1025. The second corner area 1027 is located between the third bending area 1024 and the fourth bending area 1025. The third bending area 1024 is located between the third bending area 1024 and the second bending area 1022.

[0090] Signal lines (not shown in the figure) can also be provided in the third bend area 1024, the fourth bend area 1025, the first corner area 1026, the second corner area 1027, and the third corner area 1028. The arrangement of the signal lines can be the same as that of the signal trace 10. Each embodiment of this application uses the first bend area 1021, the second bend area 1022, the corner area 1023, and the signal trace 10 as examples for description, but this should not be construed as limiting the scope of this application.

[0091] Please see Figure 1 and Figure 8 , Figure 8 This application provides Figure 1 A schematic diagram of the third enlarged structure at point Q.

[0092] In this embodiment, the display panel 100 includes multiple signal traces 10. Each signal trace 10 includes a first bridge wire 121, a second bridge wire 122, and a third bridge wire 123 connecting the first bridge wire 121 and the second bridge wire 122. Among the multiple signal traces 10, multiple first bridge wires 121 are arranged in parallel, multiple second bridge wires 122 are arranged in parallel, and multiple third bridge wires 123 are arranged in parallel.

[0093] The embodiments of this application can improve the wiring regularity of each signal trace 10, improve space utilization, and avoid short circuits between each signal trace 10.

[0094] It should be noted that the structure of the signal trace 10 in this embodiment can be referred to the structure of the signal trace 10 in the above embodiments, and will not be repeated here. Furthermore, Figure 8 Only six signal traces 10 are shown in the diagram to illustrate the scheme of the embodiments of this application, but they should not be construed as limiting this application.

[0095] In this embodiment, the display panel 100 further includes a positioning mark T. The positioning mark T is disposed in the corner area 1023. The positioning mark T is used for positioning identification at subsequent bending points.

[0096] It is understandable that the display panel 100 reduces the bezel by bending the bonding area to the back for fixation. During bending, alignment can be achieved by calculating and gripping the position of the positioning mark T. In this embodiment, by setting the positioning mark T in the corner area 1023, the alignment mark T can be prevented from occupying the flat display area 101.

[0097] Furthermore, in this embodiment, the vertical distance between the positioning mark T and the bridging wire 12 along the extending direction of the first side 101a is greater than 0.2 micrometers. The vertical distance between the positioning mark T and the bridging wire 12 along the extending direction of the second side 101b is also greater than 0.2 micrometers.

[0098] For example, along the extension direction of the first side 101a, the vertical distance between the positioning mark T and the bridging wire 12 can be 0.2 micrometers, 0.25 micrometers, 0.5 micrometers, etc. Along the extension direction of the second side 101b, the vertical distance between the positioning mark T and the bridging wire 12 can be 0.2 micrometers, 0.25 micrometers, 0.5 micrometers, etc. These will not be listed individually here.

[0099] This application embodiment can avoid the positioning mark T interfering with the bridge wire T by limiting the distance between the positioning mark T and the bridge wire 12.

[0100] Accordingly, this application also provides a display device. The display device includes a display panel and a cover plate. The cover plate is disposed on the display panel. The display panel is the display panel 100 described in any of the above claims, and will not be described again here.

[0101] The display device may be a smartphone, tablet computer, e-book reader, smartwatch, camera, game console, etc., and this application does not limit it.

[0102] For details, please refer to Figure 9 , Figure 9 This is a schematic diagram of a display device provided in this application. The display device 1000 includes a display panel 100 and a cover plate 200. The cover plate 200 is disposed on the display panel 100.

[0103] Among them, the cover plate 200 can be a four-curved glass cover plate. The forming process of the four-curved glass cover plate can be a single-piece glass hot bending process, in which a single piece of flat glass is softened and hot bent into shape at high temperature through a graphite mold pressure head with a specific curvature.

[0104] This application provides a display device 1000. The display device 1000 includes a display panel 100. The display panel 100 includes a substrate and signal traces disposed on the substrate. The substrate includes a planar display area and a bent area surrounding the planar display area. The planar display area includes an adjacent first side and a second side. The bent area includes a first bent area bent along the first side, a second bent area bent along the second side, and a corner area located between the first bent area and the second bent area. The signal traces include a first trace and a bridging wire connected to the first trace. The first trace is located in the first bent area, the bridging wire is located in the corner area, and the elongation of the bridging wire is greater than the elongation of the first trace. By setting the signal traces as connected first traces and bridging wires, since the bridging wires are located in the corner area and the elongation rate of the bridging wires is greater than that of the first connection, when the display panel 100 is attached to the cover plate 200, the bending resistance of the signal traces in the corner area can be improved, preventing the wrinkles that occur in the corner area from causing the signal traces to break, thereby improving the yield of the display panel 100.

[0105] The display panel and display device provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display panel, characterized in that, include: A substrate, the substrate including a planar display area and a bent area surrounding the planar display area, the planar display area including an adjacent first side and a second side, the bent area including a first bent area bent along the first side, a second bent area bent along the second side, and a corner area located between the first bent area and the second bent area; and At least one signal trace is disposed on the substrate. The signal trace includes a first trace and a bridging wire connected to the first trace. The first trace is located in the first bend region, and the bridging wire is located in the corner region. The elongation of the bridging wire is greater than the elongation of the first trace. The bridging wire includes a first bridging wire, a second bridging wire, and a third bridging wire connecting the first bridging wire and the second bridging wire, wherein the second bridging wire is connected to the first trace; The first bridging wire is arranged parallel to the first side, and the second bridging wire is arranged parallel to the second side.

2. The display panel according to claim 1, characterized in that, The first bridging wire has a first vertical distance between the end near the second side and the second side, and the second bridging wire has a second vertical distance between the end near the first side and the first side. Wherein, both the first vertical distance and the second vertical distance are greater than 0.2 mm, and the absolute value of the difference between the first vertical distance and the second vertical distance is less than 0.1 mm.

3. The display panel according to claim 1 or 2, characterized in that, The signal trace also includes a second trace, which is located in the second bend area and is connected to the first bridging wire. The first trace and the second trace are arranged on the same layer, while the first trace and the bridging wire are arranged on different layers.

4. The display panel according to claim 3, characterized in that, The angle between the first trace and the second bridge wire is equal to the angle between the second trace and the first bridge wire.

5. The display panel according to claim 3, characterized in that, The display panel includes multiple signal traces, among which multiple first bridge wires are arranged in parallel, multiple second bridge wires are arranged in parallel, and multiple third bridge wires are arranged in parallel.

6. The display panel according to claim 3, characterized in that, The display panel further includes a gate metal layer and a first source / drain metal layer, the gate metal layer being disposed on the substrate, and the first source / drain metal layer being disposed on the side of the gate metal layer away from the substrate. The first trace and the second trace are both disposed on the same layer as the gate metal layer, the bridging wire is disposed on the same layer as the first source-drain metal layer, and the first trace and the second trace are respectively connected to the bridging wire through corresponding first contact holes.

7. The display panel according to claim 6, characterized in that, The display panel further includes an interlayer insulating layer disposed on the gate metal layer. The first source / drain metal layer is disposed on the side of the interlayer insulating layer away from the substrate. The interlayer insulating layer has a plurality of first contact holes, each of which penetrates the interlayer insulating layer and extends to the side of the first trace or the second trace away from the substrate.

8. The display panel according to claim 3, characterized in that, The display panel further includes a gate metal layer, a capacitor metal layer, a first source / drain metal layer, and a second source / drain metal layer. The gate metal layer is disposed on the substrate. The capacitor metal layer is disposed on the side of the gate metal layer away from the substrate. The first source / drain metal layer is disposed on the side of the capacitor metal layer away from the substrate. The second source / drain metal layer is disposed on the side of the first source / drain metal layer away from the substrate. The first trace and the second trace are both disposed on the same layer as the gate metal layer or the capacitor metal layer, and the bridging wire is disposed on the same layer as the first source-drain metal layer or the second source-drain metal layer. The first trace and the second trace are respectively connected to the bridging wire through corresponding second contact holes.

9. The display panel according to claim 8, characterized in that, The display panel further includes an interlayer insulating layer disposed on the capacitor metal layer, a first planarization layer disposed on the interlayer insulating layer, the first planarization layer covering the first source / drain metal layer, and the second source / drain metal layer disposed on the side of the first planarization layer away from the substrate; the first planarization layer has a plurality of second contact holes, each second contact hole penetrating the first planarization layer and extending to the first trace or the side of the second trace away from the substrate.

10. The display panel according to claim 1, characterized in that, The bridge wire is provided with at least one groove.

11. The display panel according to claim 10, characterized in that, The bridging wire is provided with a plurality of grooves, which penetrate the bridging wire and are arranged in a straight line or in a chain on the bridging wire.

12. The display panel according to claim 1, characterized in that, The display panel includes two signal traces spaced apart, one of which is a scan signal control trace and the other is a transmit signal control trace. The display panel also includes a first GOA circuit and a second GOA circuit disposed in the bending area. The first GOA circuit is connected to the scan signal control trace, and the second GOA circuit is connected to the transmit signal control trace.

13. The display panel according to claim 12, characterized in that, The second GOA circuit is located on the side of the first GOA circuit away from the flat display area, the scan signal control trace is located between the first GOA circuit and the second GOA circuit, and the transmit signal control trace is located on the side of the second GOA circuit away from the flat display area.

14. The display panel according to claim 12, characterized in that, The first GOA circuit is disposed in the first bending area and the second bending area, and the second GOA circuit is disposed in the first bending area and the second bending area.

15. The display panel according to claim 1, characterized in that, The display panel also includes a positioning mark, which is located in the corner area.

16. The display panel according to claim 15, characterized in that, Along the extension direction of the first side, the vertical distance between the positioning mark and the bridging wire is greater than 0.2 micrometers, and along the extension direction of the second side, the vertical distance between the positioning mark and the bridging wire is greater than 0.2 micrometers.

17. A display device, characterized in that, The display device includes a display panel and a cover plate, the cover plate being disposed on the display panel, and the display panel being the display panel according to any one of claims 1-16.

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