Display panel and display device

Abstract

The invention is applicable to the technical field of display, and provides a display panel and a display device.The display device comprises a light-emitting substrate and a touch layer arranged on the light-emitting substrate, the touch layer comprises a plurality of first touch wires and a plurality of second touch wires, and in a binding area, each second touch wire comprises a first section, a second section and a third section which are connected in sequence, each first section extends in the first direction, each second section is arranged in the second direction and extends towards the first touch wire, and each third section extends in the first direction. The second section of the second touch wire is arranged in the binding area and extends in the second direction, the second touch wire is transversely pulled before entering the flexible circuit board, the second touch wire and the first touch wire are connected into the circuit board on the same side, the area occupied by the second touch wire and the first touch wire in the flexible circuit board is reduced, the space occupied by the flexible circuit board on the back face of the light-emitting substrate is reduced, and the light-emitting efficiency of the light-emitting substrate is improved. Spatial arrangement of other parts in the display device and reduction of the size of the whole machine are facilitated.

Description

Technical Field

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

[0002] With the continuous development of display technology, customers have increasingly higher requirements for narrow bezels, thinness, and lightness of display devices, and the integration of display devices is also increasing. The layout of each structure in a display device affects the layout of other surrounding structures, thus affecting the overall size and layout of the display device.

[0003] The circuit driving structure of the display device, such as FPC (Flexible Printed Circuit) or COF (Chip On FPC), is folded to the back of the display panel by bending to achieve a narrow frame on the front. Other components such as batteries are also set on the back of the display panel. Therefore, the smaller the size of the FPC or COF, the more space is reserved for other components. At present, the wiring layout between the display panel and the circuit driving structure still needs to be improved to further compress the wiring space. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a display panel, aiming to solve the technical problem that the wiring layout between the display panel and the circuit driving structure in the existing display device occupies a large area.

[0005] The embodiment of the present application is implemented as follows: a display panel includes a light-emitting substrate and a touch layer provided on the light-emitting substrate, wherein the display panel includes a display area, a frame area surrounding the display area, and a binding area provided on one side of the frame area along a first direction;

[0006] The touch layer includes a plurality of first touch lines and a plurality of second touch lines, each of the first touch lines being led out from one side of the display area along the second direction and one side along the first direction, and extending along the first direction to the binding area, and each of the second touch lines being led out from the other side of the display area along the second direction and one side along the first direction, and extending along the first direction to the binding area;

[0007] In the binding area, each of the second touch lines includes a first segment, a second segment, and a third segment connected in sequence, each of the first segments extends along the first direction, each of the second segments is arranged along the second direction and extends toward the first touch line, and each of the third segments extends along the first direction;

[0008] The first direction and the second direction intersect.

[0009] In one embodiment, the display panel further comprises a display driver chip disposed in the binding area, and along the second direction, the first touch trace and the third segment are located on the same side of the display driver chip;

[0010] Preferably, the first segment is arranged close to the display area, and the third segment is located on a side of the second segment away from the display area;

[0011] Preferably, it further comprises a display driving wire; a portion of the display driving wire is provided in the binding area and is used to connect to the display driving chip;

[0012] Preferably, another portion of the display driving wiring is located in the frame area and connected to the display area.

[0013] In one embodiment, the display panel further includes a touch driver chip and a circuit board, the circuit board is connected to a side of the binding area away from the display area, and the touch driver chip is provided on the circuit board;

[0014] The third sections of the first touch trace and the second touch trace extend from the same side of the display driver chip along the second direction to the circuit board and are connected to the touch driver chip;

[0015] Preferably, along the first direction, the first touch wiring and the second touch wiring are located on the same side of the touch driver chip;

[0016] Preferably, the display panel further comprises a shielding electrode, the shielding electrode is provided in the binding area, and the orthographic projection of the second segment on the light-emitting substrate is located within the orthographic projection of the shielding electrode on the light-emitting substrate;

[0017] Preferably, the shielding electrode is used to connect a fixed voltage;

[0018] Preferably, the orthographic projection direction of the light-emitting substrate is perpendicular to the first direction and the second direction;

[0019] Preferably, the first direction and the second direction are perpendicular;

[0020] Preferably, a portion of the binding area along one side of the second direction and a portion of the circuit board corresponding to the binding area serve as a joining area, and the first touch trace and the second touch trace are connected to the touch driver chip at the joining area.

[0021] In one embodiment, the light-emitting substrate includes a driving layer and a light-emitting layer disposed on one side of the driving layer, and the touch layer is disposed on a side of the light-emitting layer away from the driving layer;

[0022] The driving layer includes cathode power lines provided in the frame area and the binding area;

[0023] The light-emitting layer includes cathodes provided in the display area and the frame area, and the cathodes are connected to the cathode power lines;

[0024] Preferably, the shielding electrode is connected to the cathode power line.

[0025] In one embodiment, the cathode power line includes a main body section provided in the border area, and the main body section is connected to the cathode;

[0026] Preferably, a portion of the cathode is provided in the frame area, and the orthographic projection of the main body segment on the light-emitting substrate at least partially overlaps with the orthographic projection of the cathode located in the frame area on the light-emitting substrate;

[0027] Preferably, at least one insulating layer is provided between the main body segment and the cathode located in the border area, a second via hole is provided on the insulating layer located in the border area, and the main body segment is connected to the cathode via the second via hole.

[0028] In one embodiment, the cathode power line includes a connecting section located in the binding area, and the shielding electrode is connected to the connecting section;

[0029] Preferably, the orthographic projection of the shielding electrode on the light-emitting substrate at least partially overlaps with the orthographic projection of the connecting segment on the light-emitting substrate;

[0030] At least one insulating layer is provided between the shielding electrode and the cathode power line located in the binding area, a first via hole is provided on the insulating layer located in the binding area, and the shielding electrode is connected to the cathode power line via the first via hole;

[0031] Preferably, the cathode power line includes two connecting segments located on both sides of the binding area along the second direction, and both ends of the shielding electrode along the second direction are connected to the connecting segments through the first via holes;

[0032] Preferably, the shielding electrode and the cathode are in the same layer and are formed by the same photomask;

[0033] The cathode power line further includes a main body section provided in the frame area, wherein one end of the main body section located in the frame area close to the binding area is connected to the connecting section;

[0034] Preferably, the main body section and the connecting section are in the same layer.

[0035] In one embodiment, the cathode power line includes two connecting segments located on both sides of the binding area along the second direction; the orthographic projection of the first touch line located in the binding area on the light-emitting substrate is located within the orthographic projection of one of the connecting segments on the light-emitting substrate, and the orthographic projection of the first segment of the second touch line located in the binding area on the light-emitting substrate is located within the orthographic projection of the other connecting segment on the light-emitting substrate.

[0036] In one embodiment, a ground signal line located on at least one side of the display driver chip is provided in the binding area, and the ground signal line is connected to the display driver chip; and the shielding electrode is connected to the ground signal line.

[0037] In one embodiment, the display panel further includes a bending area provided between one side of the frame area and the binding area;

[0038] Preferably, a side of each of the first touch lines and the second touch lines close to the display area is further connected to the frame area via the bending area;

[0039] Preferably, the first touch trace and the third section are arranged in the bending area and the binding area along the first direction.

[0040] Another object of the embodiments of the present application is to provide a display panel comprising a light-emitting substrate and a touch layer provided on the light-emitting substrate; the display panel comprising a display area, a frame area surrounding the display area, and a binding area provided on one side of the frame area along a first direction;

[0041] The touch layer includes a plurality of first touch lines and a plurality of second touch lines, each of the first touch lines being led out from one side of the display area along the second direction and one side along the first direction, and extending along the first direction to the frame area, and each of the second touch lines being led out from the other side of the display area along the second direction and one side along the first direction;

[0042] In the border area, each of the second touch lines includes a fourth segment and a fifth segment connected in sequence, each of the fourth segments is arranged along the second direction and extends toward the first touch line, and each of the fifth segments is arranged along the first direction; the first direction and the second direction intersect.

[0043] In one embodiment, the display panel further includes a display driver chip disposed in the binding area, and the fifth segment is also disposed in the binding area; along the second direction, the first touch trace and the portion of the fifth segment located in the binding area are located on the same side of the display driver chip;

[0044] Preferably, it further includes a display drive line; a portion of the display drive line is located in the frame area and connected to the display area;

[0045] Preferably, another portion of the display driver wiring is provided in the binding area and is used to connect with the display driver chip.

[0046] In one embodiment, the display panel further includes a touch driver chip and a circuit board, the circuit board being connected to a side of the binding area away from the display area, the touch driver chip being disposed on the circuit board, and the fifth sections of the first touch trace and the second touch trace extending from the same side of the display driver chip along the second direction to the circuit board and being connected to the touch driver chip;

[0047] Preferably, along the first direction, the first touch wiring and the second touch wiring are located on the same side of the touch driver chip;

[0048] Preferably, the display panel further comprises a shielding electrode, the shielding electrode being provided in the frame area close to the binding area, and the orthographic projection of the fourth segment on the light-emitting substrate being located within the orthographic projection of the shielding electrode on the light-emitting substrate;

[0049] Preferably, the shielding electrode is used to connect a fixed voltage;

[0050] Preferably, the orthographic projection direction of the light-emitting substrate is perpendicular to the first direction and the second direction;

[0051] Preferably, the first direction and the second direction are perpendicular.

[0052] In one embodiment, the light-emitting substrate includes a driving layer and a light-emitting layer disposed on one side of the driving layer, and the touch layer is disposed on a side of the light-emitting layer away from the driving layer;

[0053] The driving layer includes cathode power lines provided in the frame area and the binding area;

[0054] The light-emitting layer includes a cathode provided in the display area and the frame area, and the cathode is connected to the cathode power line and the shielding electrode;

[0055] Preferably, the cathode power line includes a main body section provided in the frame area, and the main body section is connected to the cathode;

[0056] Preferably, a portion of the cathode is provided in the frame area, and the orthographic projection of the main body segment on the light-emitting substrate at least partially overlaps with the orthographic projection of the cathode located in the frame area on the light-emitting substrate;

[0057] Preferably, at least one insulating layer is provided between the main body segment and the cathode located in the border area, a second via hole is provided on the insulating layer located in the border area, and the main body segment is connected to the cathode via the second via hole;

[0058] Preferably, at least a portion of the cathode located in the border area is reused as the shielding electrode.

[0059] In one embodiment, the display panel further includes a bending area provided between one side of the frame area and the binding area;

[0060] Preferably, the first touch trace and the fifth segment are arranged in the bending area and the binding area along the first direction.

[0061] Another object of the embodiments of the present application is a display device, which includes the display panel as described in the above embodiments.

[0062] The display panel and display device provided by the embodiments of the present application have the following beneficial effects:

[0063] In the display panel and display device provided by the embodiments of the present application, the second segments of the plurality of second touch traces are arranged in the binding area or within the frame area, and each second segment extends along the second direction. In this way, the second segments of the second touch traces are horizontally stretched before entering the flexible circuit board, so that the second touch traces and the plurality of first touch traces are connected to the circuit board on the same side. This can reduce the area occupied by the second touch traces within the flexible circuit board and the space occupied by the flexible circuit board on the back side of the light-emitting substrate, which is generally beneficial to the spatial arrangement of other components in the display device and the reduction of the overall volume of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0065] Figure 1 is a schematic structural diagram of a display panel in the prior art;

[0066] Figure 2 This is a schematic diagram of the wiring structure of the display panel provided in the first embodiment of the present application;

[0067] Figure 3 1 is a schematic diagram of the electrode structure of the display panel provided in the first embodiment of the present application;

[0068] Figure 4This is a schematic structural diagram of the second touch wiring in the display panel provided in the first embodiment of the present application;

[0069] Figure 5 yes Figure 2 The cross-section along line BB;

[0070] Figure 6 yes Figure 3 Cross-section along line CC;

[0071] Figure 7 yes Figure 3 Cross-section along line DD.

[0072] Figure 8 is a schematic structural diagram of a display panel provided in a second embodiment of the present application;

[0073] Figure 9 is a schematic structural diagram of a display panel provided in a third embodiment of the present application;

[0074] Figure 10 yes Figure 9 The cross-section along line EE in the middle;

[0075] Figure 11 This is a schematic structural diagram of the second touch wiring in the display panel provided in the third embodiment of the present application.

[0076] The meanings of the marks in the figure are:

[0077] 200'-display device;

[0078] 100, 100'-display panel;

[0079] 10 - substrate, M1 - first metal layer, M2 - second metal layer, M3 - third metal layer, M4 - fourth metal layer, M5 - fifth metal layer, INS1 - first insulating layer, INS2 - second insulating layer, INS3 - third insulating layer, INS4 - fourth insulating layer; PDL - pixel definition layer, SPC - spacer layer; 101 - first via hole, 102 - second via hole;

[0080] 11, 11' - touch signal line, 111 - first touch line, 112 - second touch line, 1121 - first section, 1122 - second section, 1123 - third section, 1124 - fourth section, 1125 - fifth section, 113 - touch input line, 114 - touch output line;

[0081] 120- cathode; 121- anode;

[0082] 125- cathode power line, 1251- main section, 1252- connecting section;

[0083] 131 - display area, 132 - frame area, 133, 133' - bending area, 134, 134' - binding area, 135, 135' - circuit board, 130 - joint area;

[0084] 136, 136'-display driver chip, 137, 137'-touch driver chip;

[0085] 14-Display driver wiring;

[0086] 15- ground signal line;

[0087] 17-shielding electrode;

[0088] 18-dam;

[0089] X-first direction, Y-second direction, Z-third direction. DETAILED DESCRIPTION

[0090] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0091] It should be noted that when a component is referred to as being "fixed on" or "set on" another component, it may be fixed or set on the other component directly or indirectly. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of description and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this patent. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0092] In order to illustrate the technical solution described in this application, the following is a detailed description with reference to specific drawings and embodiments.

[0093] See also Figure 1 As shown, for the display device 200', the display panel 100' includes a touch layer and a light emitting substrate. The touch layer is arranged on the light emitting side of the light emitting substrate. A display driver chip 136' and a touch driver chip 137' are arranged on one side of the light emitting substrate. Figure 1As shown, a bending area 133' and a binding area 134' connected to the bending area 133' are formed on one side of the light-emitting substrate. The binding area 134' is located on the back side of the light-emitting substrate due to the bending of the bending area 133'. The display driver chip 136' is arranged in the binding area 134', and the touch driver chip 137' is arranged on the circuit board 135'. The circuit board 135' is connected to the binding area 134', and the touch signal line 11' of the touch layer is connected to the touch driver chip 137' through the circuit board 135'.

[0094] All the drawings of this application illustrate the bending area 133 ′ in a manner of being flattened.

[0095] Figure 1 In the example, touch signal lines 11' extend from both sides of the light-emitting substrate. These lines pass through the binding area 134' and reach the circuit board 135'. The touch signal lines 11' on one side are then pulled horizontally to the other side of the circuit board 135'. All of the touch signal lines 11' are then connected to the touch driver chip 137'.

[0096] The problem with the above structure is that the touch signal line 11' occupies a large area when stretched horizontally in the circuit board 135', which increases the area and volume of the circuit board 135' accordingly. In turn, it occupies a large volume on the back of the light-emitting substrate, which is not conducive to the arrangement of devices such as batteries on the back of the light-emitting substrate.

[0097] See also Figure 2 As shown, an embodiment of the present application provides a display panel 100 and a driver chip disposed on one side of the display panel 100 . The driver chip includes a display driver chip 136 and a touch driver chip 137 .

[0098] The display panel 100 includes a light emitting substrate and a touch layer stacked in sequence. The display panel 100 includes a display area 131 (also known as the AA area, see Figure 2 AA) and a border area 132 provided outside the display area 131. In some embodiments, a bending area 133 and a binding area 134 are further provided on one side of the border area 132. The bending area 133 is located between one side of the border area 132 and the binding area 134, and the circuit board 135 is coupled to the edge of the binding area 134. The border area 132 can be provided on multiple sides of the display area 131 or be provided around the display area 131.

[0099] The circuit board 135 may be a flexible circuit board. In other optional embodiments, it may also be a rigid circuit board.

[0100] Display driver chip 136 is located in binding area 134 and is connected to the light-emitting substrate. Touch driver chip 137 is located on circuit board 135 and is connected to the touch layer. Circuit board 135 is located on the side of binding area 134 away from display area 131. Touch input lines 113 and touch output lines 114 are both connected to touch driver chip 137.

[0101] The touch layer includes two layers of electrodes insulated from each other. Correspondingly, the two layers of electrodes are respectively connected to the touch signal lines 11 , that is, the touch signal lines 11 connected to one layer of electrodes are touch input lines 113 , and the touch signal lines 11 connected to the other layer of electrodes are touch output lines 114 .

[0102] For ease of understanding and illustration, a first direction X and a second direction Y are defined on the display panel 100, which are inclined or even perpendicular to each other. Both layers of electrodes are arranged in an array along the first direction X and the second direction Y. The first direction X and the second direction Y are two mutually inclined directions. Optionally, the first direction X and the second direction Y are perpendicular to each other. Assuming that the first direction X corresponds to the up-down direction and the second direction Y corresponds to the left-right direction, one of the touch output line 114 and the touch input line 113 is led out from the lower end of the light-emitting substrate, extends downward, and is connected to the touch driver chip 137. The other of the touch output line 114 and the touch input line 113 is led out from the left and right sides of the display area 131, then extends downward until it is connected to the touch driver chip 137.

[0103] like Figure 2 As shown, partial touch output lines 114 and partial touch input lines 113 are provided on both the left and right sides. Here, the partial touch output lines 114 and partial touch input lines 113 located on the left are defined as multiple first touch traces 111, and the partial touch output lines 114 and partial touch input lines 113 located on the right are defined as multiple second touch traces 112 (the reverse is also possible, this is just an example).

[0104] The first touch trace 111 is led out from the display area 131 on one side along the second direction Y and on one side along the first direction X, and extends along the first direction X to the binding area 134. Each second touch trace 112 is led out from the other side of the display area 131 along the second direction Y and on one side along the first direction X, and extends along the first direction X to the binding area 134.

[0105] See Figure 2 As shown, as an example, the touch driver chip 137 is arranged on the left side of the circuit board 135, and the left part of the binding area 134 (or the right part, the present application takes the left part as an example) and the corresponding part of the circuit board 135 serve as the bonding area 130 between the touch signal line 11 and the touch driver chip 137. Figure 2 As shown in the middle rectangular dotted box.

[0106] In one embodiment of the present application, the first touch trace 111 extends vertically downward through the bonding area 130 and can directly form a connection with the touch driver chip 137. The second touch trace 112 first extends downward into the binding area 134, and before entering the circuit board 135, it is pulled horizontally to the left along the first direction X until it approaches the first touch trace 111 and the bonding area 130. Then, it extends downward together with the first touch trace 111 and enters the circuit board 135, and then forms a connection with the touch driver chip 137 in the bonding area 130.

[0107] Specifically, if Figure 2 As shown, the first touch trace 111 is disposed along the first direction X in the bending area 133 , the binding area 134 and the circuit board 135 .

[0108] like Figure 4 As shown, within the binding area 134, each second touch trace 112 includes a first segment 1121, a second segment 1122, and a third segment 1123, which are connected in sequence. The first segment 1121 enters the binding area 134 from the border area 132 and is located on the right side, generally extending along the first direction X. The second segment 1122 is disposed in the binding area 134 and extends along the second direction Y. The third segment 1123 is disposed within the binding area 134 and the circuit board 135 and extends along the first direction X. Subsequently, the plurality of first touch signal lines 11 and the plurality of third segments 1123 can extend together on the left side of the binding area 134 until they connect to the touch driver chip 137 on the circuit board 135.

[0109] In the display panel 100 provided in the embodiment of the present application, the second sections 1122 of the plurality of second touch traces 112 are arranged in the binding area 134 and extend along the second direction Y. They are pulled horizontally before entering the circuit board 135, so that the second touch traces 112 and the plurality of first touch traces 111 are connected to the circuit board 135 on the same side. Thus, the area occupied by the second touch traces 112 in the circuit board 135 can be reduced, the size of the circuit board 135 can be greatly compressed, and the space occupied by the circuit board 135 on the back side of the display panel 100 can be reduced, thereby saving some space in the entire machine, which is generally beneficial to the spatial arrangement of other device modules in the display panel 100 and the reduction of the volume of the entire machine. In addition, saving some space in the entire machine is also beneficial to improving the performance of other device modules, ultimately achieving an improvement in the overall performance of the entire machine.

[0110] The light-emitting substrate includes a driving layer and a light-emitting layer arranged on one side of the driving layer. The touch layer is arranged on the side of the light-emitting layer away from the driving layer. The driving layer is provided with a pixel driving circuit for driving each light-emitting unit of the light-emitting layer to emit light.

[0111] Depending on the pixel drive circuit, the drive layer has different layer structures. For example, existing pixel drive circuits include 2T1C (two thin-film transistors, one capacitor) drive architectures, 7T1C (seven thin-film transistors, one capacitor) drive architectures, and 8T1C (eight thin-film transistors, one capacitor) drive architectures. Depending on the pixel drive circuit, the number of corresponding metal layers in the drive layer varies, and the structures formed by each metal layer vary.

[0112] like Figure 5 As shown, at the edge of the display area 131, a second metal layer M2, a third metal layer M3, a third insulating layer INS3, multiple anodes 121, and a pixel definition layer PDL are stacked in sequence on one side of the base substrate 10. A light-emitting material layer (not shown) is provided within the opening of the pixel definition layer PDL. A cathode 120 (located in the fourth metal layer M4) is provided on the side of the pixel definition layer PDL facing away from the base substrate 10. A fourth insulating layer INS4 is provided on the side of the cathode 120 facing away from the base substrate 10. The second touch trace 112 of the touch layer (located in the fifth metal layer M5) is provided on the side of the fourth insulating layer INS4 facing away from the base substrate 10. The fourth insulating layer INS4 is used to isolate the light-emitting layer from the touch layer. It can be understood that the touch input line 113 and touch output line 114 in the second touch trace 112 are made of two layers of metal; only the layer closest to the light-emitting layer is shown here.

[0113] See also Figure 5 As shown, in the border area 132, a plurality of dams 18 are provided, and the dams 18 include a first insulating layer INS1, a third metal layer M3, a third insulating layer INS3, a pixel definition layer PDL (here only refers to the material on the same layer as the pixel definition layer PDL, and does not mean that the pixel opening is formed here, the same below), a fourth insulating layer INS4, and a second touch line 112, which are sequentially stacked on one side of the base substrate 10.

[0114] See also Figure 6 As shown, in the bending region 133, a first insulating layer INS1, a second metal layer M2, a second insulating layer INS2, a third metal layer M3, a third insulating layer INS3, a pixel definition layer PDL, a spacer layer SPC, a fourth insulating layer INS4, and the like are sequentially stacked on one side of the base substrate 10. The fifth metal layer M5 on both sides of the bending region 133 is connected to the third metal layer M3 via a line-switching hole penetrating the third insulating layer INS3, and is further connected to the second metal layer M2 via a line-switching hole penetrating the second insulating layer INS2.

[0115] See also Figure 7 As shown, in the binding area 134 , a first metal layer M1 , a second metal layer M2 , a third metal layer M3 , a third insulating layer INS3 and the second segment 1122 of the second touch trace 112 are sequentially stacked on one side of the base substrate 10 .

[0116] The above is merely an example. In other embodiments, the layer structures of the border area 132 , the bending area 133 and the binding area 134 may be arranged in other ways.

[0117] See also Figure 2 As shown, along the second direction Y, the third segments 1123 of the first touch trace 111 and the second touch trace 112 are located on the same side of the display driver chip 136 . In this embodiment, the third segments 1123 of the first touch trace 111 and the second touch trace 112 are located on the right side of the display driver chip 136 .

[0118] Among them, Figure 2 As shown, the third segments 1123 of the first touch trace 111 and the second touch trace 112 extend from the display driver chip 136 along the same side of the second direction Y to the circuit board 135 and are connected to the touch driver chip 137 .

[0119] like Figure 2 As shown, the first segment 1121 is arranged close to the display area 131 relative to the third segment 1123, that is, the first segment 1121 is located on the side of the second segment 1122 close to the display area 131, and the third segment 1123 is located on the side of the second segment 1122 away from the display area 131.

[0120] See also Figure 2 As shown, the display driver trace 14 for connecting the display driver chip 136 and each pixel is arranged in the border area 132, the bending area 133 and the binding area 134. A portion of the display driver trace 14 is arranged in the binding area 134 and is used to connect with the display driver chip 136. It can be understood that the display driver trace 14 is used to provide display drive signals to each pixel in the display area 131. Therefore, another portion of the display driver trace 14 is located in the border area 132 and connected to the display area 131. Figure 2 Furthermore, a portion of the display driving line 14 is also provided in the bending area 133 to connect the portion of the display driving line 14 located in the frame area 132 and the portion located in the binding area 134 .

[0121] Along the first direction X, the first touch trace 111 and the second touch trace 112 are located on the same side of the touch driver chip 137 , specifically, on the side facing the display area 131 .

[0122] Specifically, the light-emitting layer includes a plurality of light-emitting units, each of which includes an anode 121 and a cathode 120. The anode 121 is a plurality of independently arranged electrode blocks, and the cathodes 120 of all light-emitting units are connected to form a whole surface electrode. Figure 3The area filled with the lower left oblique line in the figure) is located in the display area 131 and part of the frame area 132, that is, a part of the entire surface electrode of the cathode 120 exceeds the display area 131.

[0123] like Figure 3 and Figure 7 As shown, the display panel 100 further includes a cathode power line 125, the main section 1251 of which is located in the frame area 132 and is used to connect to a portion of the cathode 120 located in the frame area 132. In this way, a fixed voltage from the cathode power line 125 can be applied to the cathode 120.

[0124] like Figure 3 As shown, in the border area 132 , the orthographic projection of the main body segment 1251 on the light-emitting substrate and the orthographic projection of the cathode 120 located in the border area 132 on the light-emitting substrate at least partially overlap.

[0125] Specifically, if Figure 3 As shown, the orthographic projection of the main segment 1251 on the light-emitting substrate partially overlaps with the orthographic projection of the cathode 120 on the light-emitting substrate. In the area where the orthographic projections of the two overlap, the portion of the cathode 120 located in the frame area 132 is connected to the main segment 1251 of the cathode power line 125 through one or more second vias 102 provided on the insulating layer (such as the fourth insulating layer INS4) in the frame area 132, as shown in FIG. Figure 3 As shown, in the frame area 132, second via holes 102 are provided on one or more sides of the display area 131. In specific applications, the number of second via holes 102 can be set according to design requirements, and the figure shown here is only for example.

[0126] In addition, the cathode power line 125 has another part, see Figure 3 The connecting segment 1252 is provided in the binding area 134 and is used to connect the main segment 1251 to the display driver chip 136 to obtain a fixed voltage of the cathode 120.

[0127] In one embodiment of this application, please refer to Figure 3 As shown, the display panel 100 further includes a shielding electrode 17, which is disposed in the binding area 134 and between the display driving traces 14 and the plurality of second segments 1122. The shielding electrode 17 is used to connect a fixed voltage.

[0128] like Figure 7 As shown, in the third direction Z, the shielding electrode 17 is located between the display driving trace 14 and the plurality of second segments 1122. The third direction Z is perpendicular to both the first direction X and the second direction Y, and can be understood as the thickness direction of the display panel 100. That is, the orthographic projection of the second segment 1122 on the light-emitting substrate is located within the orthographic projection of the shielding electrode 17 on the light-emitting substrate.

[0129] In an embodiment of the present application, the shielding electrode 17 is located between the second section 1122 of the second touch trace 112 and other film layers thereunder, and is used to shield the signal on the second section 1122 of the second touch trace 112, thereby avoiding crosstalk caused by the overlap of the horizontal pull portion of the second touch trace 112 with other film layers, thereby preventing the touch signal from being adversely affected, for example, causing touch failure.

[0130] Since the voltages on the display drive line 14 and the second segment 1122 are different, the shielding electrode 17 located between the two and having a fixed voltage can shield the electromagnetic interference of the signal on the display drive line 14 on the second segment 1122, and shield the electromagnetic interference of the signal on the second segment 1122 on the display drive line 14, thereby ensuring normal touch driving and display driving.

[0131] In one embodiment, the fixed voltage may be a cathode voltage, and the shielding electrode 17 is connected to the cathode power line 125. Figure 3 In this embodiment, the shielding electrode 17 and the cathode 120 are in the same layer and are formed by the same photomask process. Only the mask pattern in the cathode 120 process needs to be changed accordingly, and no additional photomask process is required, thereby ensuring process simplification.

[0132] In addition, there is sufficient area within the binding area 134 for designing the shielding electrode 17, so that the shielding electrode 17 can be made in the form of a large piece of metal. Furthermore, on the basis of achieving electromagnetic shielding, the line width of the second section 1122 of the second touch line 112 can be flexibly designed to reduce the impedance of the second touch line 112 and ensure the touch driving effect.

[0133] It should also be noted that beneath the first metal layer M1, one or more metal layers are provided to form drive traces and connect to the pixel drive circuitry within the display area 131. At least one insulating layer is provided between the first metal layer M1 and the metal layer below it. As a result, the shielding electrode 17 is insulated from and overlaps the display drive traces 14, shielding the display drive traces 14 from interference with the second touch control traces 112.

[0134] See also Figure 7 As shown, the shielding electrode 17 is connected to the connecting section 1252 of the cathode power line 125 located in the binding area 134. In this way, a cathode voltage can be provided to the shielding electrode 17 through the connecting section 1252 of the cathode power line 125. For the cathode power line 125, its main section 1251 and connecting section 1252 are preferably in the same layer structure.

[0135] Optionally, the orthographic projection of the shielding electrode 17 on the light-emitting substrate and the orthographic projection of the connecting segment 1252 on the light-emitting substrate at least partially overlap.

[0136] Further, if Figure 7 As shown, in the binding area 134 , at least one insulating layer is provided between the shielding electrode 17 and the connecting section 1252 . One or more first vias 101 are provided on the insulating layer, and the shielding electrode 17 is connected to the connecting section 1252 via the first vias.

[0137] like Figure 5 and Figure 7 As shown, in one embodiment, in the bonding region 134, the shield electrode 17 is disposed between the third insulating layer INS3 and the fourth insulating layer INS4, and thus, is in the same layer as the cathode 120. The shield electrode 17 on the fourth metal layer M4 is connected to the cathode power line 125 on the third metal layer M3.

[0138] At least one first via 101 is formed on the side of the second insulating layer INS2 facing away from the substrate 10 for connecting the shielding electrode 17 to the third metal layer M3. Here, the third metal layer M3 is used to form a cathode power line 125 and provide a cathode voltage to the cathode 120.

[0139] See also Figure 3 and Figure 7 As shown, within the binding area 134, the cathode power line 125 includes two connecting segments 1252, one located on the left and right sides of the binding area 134. In the third direction Z, one connecting segment 1252 is located below the first touch trace 111, and the other connecting segment 1252 is located below the first segment 1121 of the second touch trace 112. In other words, the orthographic projection of the first touch trace 111 located in the binding area 134 on the light-emitting substrate is located within the orthographic projection of one connecting segment 1252 on the light-emitting substrate, and the orthographic projection of the first segment 1121 of the second touch trace 112 located in the binding area 134 on the light-emitting substrate is located within the orthographic projection of the other connecting segment 1252 on the light-emitting substrate.

[0140] The two connecting segments 1252 are respectively used to shield electromagnetic interference between the first touch trace 111 , the first segment 1121 of the second touch trace 112 , and other display traces.

[0141] In the third direction Z, the shielding electrode 17 is located between the first touch line 111, the connecting section 1252 and the metal film layer of the light-emitting substrate. For example, the shielding electrode 17 is located between the first touch line 111, the connecting section 1252 and the display driving line 14 thereunder, and is used to shield the electromagnetic interference of the display driving line 14 to the first touch line 111 and the connecting section 1252.

[0142] In one embodiment, the shielding electrode 17 is connected to at least one of the two connecting segments 1252 .

[0143] In an optional embodiment, if Figure 7 As shown, the left and right ends of the shielding electrode 17 are connected to the connecting section 1252 of the cathode power line 125 through the first vias 101, respectively, to ensure the reliability of the electrical connection between the shielding electrode 17 and the cathode power line 125. Here, the number, shape, size, etc. of the first vias 101 corresponding to the left and right ends of the shielding electrode 17 are not particularly limited. Figure 3 As shown, a plurality of first via holes 101 are shown at the left and right ends of the shielding electrode 17, such as six first via holes. Figure 7 In the cross-sectional view shown, three first via holes 101 are respectively shown at the left and right ends of the shielding electrode 17 .

[0144] In one embodiment, if Figure 8 As shown, the shielding electrode 17 is connected to the ground signal line 15 of the binding area 134 and has a ground voltage.

[0145] like Figure 8 As shown, the ground signal line 15 is disposed in the binding area 134 and is located on at least one side of the display driver chip 136 , for example, surrounding the display driver chip 136 .

[0146] The ground signal line 15 may be formed of at least one of the first metal layer M1 , the second metal layer M2 , and the third metal layer M3 .

[0147] For one example, see Figure 9 、 Figure 10 and Figure 11 As shown, the display panel 100 includes a display area 131 and a border area 132 disposed outside the display area 131. In some embodiments, a bending area 133 and a binding area 134 are further disposed on one side of the border area 132. The bending area 133 is located between one side of the border area 132 and the binding area 134, and a circuit board 135 is coupled to the edge of the binding area 134. The border area 132 can be disposed on multiple sides of the display area 131 or can be disposed around the display area 131. The circuit board 135 can be a flexible circuit board, or in other optional embodiments, a rigid circuit board.

[0148] Display driver chip 136 is located in binding area 134 and is connected to the light-emitting substrate. Touch driver chip 137 is located on circuit board 135 and is connected to the touch layer. Circuit board 135 is located on the side of binding area 134 away from display area 131. Touch input lines 113 and touch output lines 114 are both connected to touch driver chip 137.

[0149] The second touch trace 112 is horizontally extended before the bending area 133 .

[0150] Specifically, in this embodiment, please refer to Figure 9 and Figure 11 As shown, the second touch trace 112 includes a fourth segment 1124 and a fifth segment 1125 connected in sequence. The fourth segment 1124 is located in the border area 132 and extends along the second direction Y and toward the first touch trace 111. The fifth segment 1125 is arranged in the border area 132, the bending area 133 and the binding area 134, and extends along the first direction X until it enters the bonding area 130 with each first touch trace 111 and can be connected to the touch driver chip 137.

[0151] In this embodiment, the second touch line 112 is horizontally bent in the border area 132, utilizing part of the space in the border area 132, which can reduce the space occupied by the fourth section 1124 of the second touch line 112 in the binding area 134 and the circuit board 135, further reducing the space occupied by the back side of the display panel 100, and is generally beneficial to the spatial arrangement of other components in the display panel 100 and the reduction of the overall volume.

[0152] like Figure 9 As shown, the fifth segment 1125 is also provided in the binding area 134. Along the second direction Y, the first touch trace 111 and the portion of the fifth segment 1125 located in the binding area 134 are located on the same side of the display driver chip 136. Figure 8 As shown in FIG, the first touch trace 111 and the fifth segment 1125 located in the binding area 134 are located on the left side of the display driver chip 136 .

[0153] Alternatively, as Figure 8 As shown, the first touch trace 111 and the fifth segment 1125 are disposed along the first direction X in the bending area 133 and the binding area 134 .

[0154] A portion of the display driving trace 14 is located in the frame area 132 and connected to the display area 131 . Another portion of the display driving trace 14 is located in the binding area 134 and is used to connect to the display driving chip 136 .

[0155] The touch driver chip 137 is disposed on the circuit board 135, and the first touch trace 111 and the fifth segment 1125 of the second touch trace 112 are connected to the touch driver chip 137. Optionally, along the first direction X, the first touch trace 111 and the second touch trace 112 are located on the same side of the touch driver chip 137. Specifically, the first touch trace 111 and the second touch trace 112 are located on the side of the touch driver chip 137 facing the display area 131.

[0156] Among them, Figure 9 As shown, the fifth segments 1125 of the first touch traces 111 and the second touch traces 112 extend from the display driver chip 136 along the same side of the second direction Y to the circuit board 135 and are connected to the touch driver chip 137 .

[0157] In this embodiment, the arrangement of the cathode 120 and the cathode power line 125 may refer to the aforementioned embodiment.

[0158] In this embodiment, Figure 8 As shown, the device further includes a shielding electrode 17, which is disposed in the border region 132 adjacent to the binding region 134. The shielding electrode 17 is connected to a fixed voltage.

[0159] Optionally, the shielding electrode 17 is also connected to the cathode 120 and has the same potential as the cathode 120 .

[0160] Please refer to Figure 8 and Figure 11 As shown, in one embodiment, the orthographic projection of the fourth segment 1124 on the light-emitting substrate is located within the orthographic projection of the shielding electrode 17 on the light-emitting substrate. In the third direction Z, the shielding electrode 17 is located between the fourth segment 1124 and the metal film layer of the light-emitting substrate. For example, the shielding electrode 17 is located between the fourth segment 1124 and the display driving trace 14 below it, thereby shielding the fourth segment 1124 from electromagnetic interference from the display driving trace 14.

[0161] In one embodiment, the shielding electrode 17 is provided in the same layer as the cathode 120 and is connected to the side of the cathode 120 facing the bending region 133, see Figure 10 shown.

[0162] As described in the previous embodiment, the cathode 120 is a full-surface electrode, and while completely covering the display area 131, a portion of the cathode 120 extends beyond the display area 131. Therefore, in this embodiment, the portion of the cathode 120 near the bending area 133, that is, the portion located in the border area 132, can be reused as the shielding electrode 17. Alternatively, as needed, the portion of the cathode 120 near the bending area 133 can be appropriately extended downward to accommodate the area occupied by the plurality of fourth segments 1124 in the first direction X.

[0163] Specifically, if Figure 10 As shown, the shielding electrode 17 ( Figure 9 The shielding electrode 17 is located in the frame region 132 and connected to the edge of the cathode 120. A plurality of fourth segments 1124 are located above the shielding electrode 17, with a fourth insulating layer INS4 disposed between the fourth segments 1124 and the shielding electrode 17.

[0164] In this embodiment, the shielding electrode 17 is formed by extending the cathode 120. There is no need to design a shielding structure in the binding area 134 below the bending area 133, nor is there any need to set vias on the insulating layer in the binding area 134 (such as the second insulating layer INS2 mentioned above, the pixel definition layer PDL, etc.) to enable the shielding electrode 17 to obtain a fixed potential. This can further simplify the process and at the same time achieve the purpose of pulling the second touch line 112 and the first touch line 111 from a single side of the display driver chip 136, thereby achieving the purpose of reducing the size of the circuit board 135, improving the overall performance of the whole machine, and reducing the volume of the whole machine.

[0165] Finally, the present invention also provides a display device including the display panel 100 described in the above embodiments. The display device has the same features and technical effects as the display panel 100 in the above embodiments, which will not be described in detail here.

[0166] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises a light-emitting substrate and a touch layer disposed on the light-emitting substrate, wherein the display panel comprises a display area, a frame area surrounding the display area, and a binding area disposed on one side of the frame area along a first direction; The touch layer includes a plurality of first touch lines and a plurality of second touch lines, each of the first touch lines is led out from one side of the display area along the second direction and one side of the first direction, and extends along the first direction to the binding area, each of the second touch lines is led out from the other side of the display area along the second direction and one side of the first direction, and extends along the first direction to the binding area; In the binding area, each of the second touch lines includes a first section, a second section and a third section connected in sequence, each of the first sections is extended along the first direction, each of the second sections is arranged along the second direction and extends toward the first touch line, and each of the third sections extends along the first direction; The first direction and the second direction intersect.

2. The display panel according to claim 1, wherein: The display panel further includes a display driver chip disposed in the binding area, and along the second direction, the first touch control trace and the third section are located on the same side of the display driver chip; Preferably, the first segment is arranged close to the display area, and the third segment is located on a side of the second segment away from the display area; Preferably, it further comprises a display driving wire; a part of the display driving wire is arranged in the binding area and is used to connect with the display driving chip; Preferably, another part of the display driving wiring is located in the frame area and connected to the display area.

3. The display panel according to claim 2, wherein: The display panel further includes a touch control driving chip and a circuit board, wherein the circuit board is connected to a side of the binding area away from the display area, and the touch control driving chip is arranged on the circuit board; The third sections of the first touch control wiring and the second touch control wiring extend from the same side of the display driver chip along the second direction to the circuit board and are connected to the touch control driver chip; Preferably, along the first direction, the first touch control wiring and the second touch control wiring are located on the same side of the touch control driver chip; Preferably, the display panel further comprises a shielding electrode, the shielding electrode is arranged in the binding area, and the orthographic projection of the second segment on the light-emitting substrate is located within the orthographic projection of the shielding electrode on the light-emitting substrate; Preferably, the shielding electrode is used to connect a fixed voltage; Preferably, the orthographic projection direction of the light-emitting substrate is perpendicular to the first direction and the second direction; Preferably, the first direction is perpendicular to the second direction; Preferably, a portion of the binding area along one side of the second direction and a portion of the circuit board corresponding to the binding area serve as a bonding area, and the first touch wiring and the second touch wiring are connected to the touch driving chip at the bonding area.

4. The display panel according to claim 3, wherein: The light-emitting substrate comprises a driving layer and a light-emitting layer arranged on one side of the driving layer, and the touch layer is arranged on a side of the light-emitting layer away from the driving layer; The driving layer includes cathode power lines arranged in the frame area and the binding area; The light-emitting layer includes a cathode disposed in the display area and the frame area, and the cathode is connected to the cathode power line; Preferably, the shielding electrode is connected to the cathode power line.

5. The display panel according to claim 4, wherein: The cathode power line includes a main body section disposed in the frame area, and the main body section is connected to the cathode; Preferably, a portion of the cathode is disposed in the frame area, and the orthographic projection of the main body segment on the light-emitting substrate at least partially overlaps with the orthographic projection of the cathode located in the frame area on the light-emitting substrate; Preferably, at least one insulating layer is provided between the main body segment and the cathode located in the border area, a second via hole is provided on the insulating layer located in the border area, and the main body segment is connected to the cathode via the second via hole.

6. The display panel according to claim 4, wherein: The cathode power line includes a connecting section located in the binding area, and the shielding electrode is connected to the connecting section; Preferably, the orthographic projection of the shielding electrode on the light-emitting substrate at least partially overlaps with the orthographic projection of the connecting section on the light-emitting substrate; At least one insulating layer is provided between the shielding electrode and the cathode power line located in the binding area, a first via hole is provided on the insulating layer located in the binding area, and the shielding electrode is connected to the cathode power line via the first via hole; Preferably, the cathode power line comprises two connecting segments located on both sides of the binding area along the second direction, and both ends of the shielding electrode along the second direction are connected to the connecting segments through the first via holes; Preferably, the shielding electrode and the cathode are in the same layer and are formed by the same photomask; The cathode power line further comprises a main body section arranged in the border area, and one end of the main body section located in the border area close to the binding area is connected to the connecting section; Preferably, the main body section and the connecting section are in the same layer.

7. The display panel according to claim 4, wherein: The cathode power line includes two connecting segments located on both sides of the binding area along the second direction; the orthographic projection of the first touch line located in the binding area on the light-emitting substrate is located within the orthographic projection of one of the connecting segments on the light-emitting substrate, and the orthographic projection of the first segment of the second touch line located in the binding area on the light-emitting substrate is located within the orthographic projection of the other connecting segment on the light-emitting substrate.

8. The display panel according to claim 3, wherein: A ground signal line located at at least one side of the display driver chip is provided in the binding area, and the ground signal line is connected to the display driver chip; and the shielding electrode is connected to the ground signal line.

9. The display panel according to any one of claims 1 to 8, characterized in that: The display panel further includes a bending area disposed between one side of the frame area and the binding area; Preferably, a side of each of the first touch wiring and the second touch wiring close to the display area is further connected to the frame area via the bending area; Preferably, the first touch wiring and the third section are arranged in the bending area and the binding area along the first direction.

10. A display panel, characterized in that: The display panel comprises a light-emitting substrate and a touch layer disposed on the light-emitting substrate; the display panel comprises a display area, a frame area surrounding the display area, and a binding area disposed on one side of the frame area along a first direction; The touch layer includes a plurality of first touch lines and a plurality of second touch lines, each of the first touch lines is led out from one side of the display area along the second direction and one side along the first direction, and extends to the frame area along the first direction, and each of the second touch lines is led out from the other side of the display area along the second direction and one side along the first direction; In the border area, each of the second touch lines includes a fourth segment and a fifth segment connected in sequence, each of the fourth segments is arranged along the second direction and extends toward the first touch line, and each of the fifth segments is arranged along the first direction; the first direction and the second direction intersect.

11. The display panel according to claim 10, wherein: The display panel further includes a display driver chip disposed in the binding area, and the fifth segment is also disposed in the binding area; along the second direction, the first touch control trace and a portion of the fifth segment located in the binding area are located on the same side of the display driver chip; Preferably, it further comprises a display drive line; a portion of the display drive line is located in the frame area and connected to the display area; Preferably, another part of the display driving wiring is arranged in the binding area and is used to connect with the display driving chip.

12. The display panel according to claim 11, wherein: The display panel further includes a touch driver chip and a circuit board, wherein the circuit board is connected to a side of the binding area away from the display area, the touch driver chip is arranged on the circuit board, and the fifth sections of the first touch trace and the second touch trace extend from the same side of the display driver chip along the second direction to the circuit board and are connected to the touch driver chip; Preferably, along the first direction, the first touch control wiring and the second touch control wiring are located on the same side of the touch control driver chip; Preferably, the display panel further comprises a shielding electrode, the shielding electrode is arranged in the frame area close to the binding area, and the orthographic projection of the fourth segment on the light-emitting substrate is located within the orthographic projection of the shielding electrode on the light-emitting substrate; Preferably, the shielding electrode is used to connect a fixed voltage; Preferably, the orthographic projection direction of the light-emitting substrate is perpendicular to the first direction and the second direction; Preferably, the first direction and the second direction are perpendicular.

13. The display panel according to claim 12, wherein: The light-emitting substrate comprises a driving layer and a light-emitting layer arranged on one side of the driving layer, and the touch layer is arranged on a side of the light-emitting layer away from the driving layer; The driving layer includes cathode power lines arranged in the frame area and the binding area; The light-emitting layer includes a cathode disposed in the display area and the frame area, and the cathode is connected to the cathode power line and the shielding electrode; Preferably, the cathode power line comprises a main body section arranged in the frame area, and the main body section is connected to the cathode; Preferably, a portion of the cathode is disposed in the frame area, and the orthographic projection of the main body segment on the light-emitting substrate at least partially overlaps with the orthographic projection of the cathode located in the frame area on the light-emitting substrate; Preferably, at least one insulating layer is provided between the main body segment and the cathode located in the border area, a second via hole is provided on the insulating layer located in the border area, and the main body segment is connected to the cathode via the second via hole; Preferably, at least a portion of the cathode located in the border area is reused as the shielding electrode.

14. The display panel according to any one of claims 10 to 13, characterized in that: The display panel further includes a bending area disposed between one side of the frame area and the binding area; Preferably, the first touch control trace and the fifth section are arranged in the bending area and the binding area along the first direction.

15. A display device, characterized in that: The invention comprises the display panel as claimed in any one of claims 1 to 9.

16. A display device, characterized in that: The invention comprises the display panel as claimed in any one of claims 10 to 14.

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