Display panel and display device

Abstract

A display panel and a display device, the display panel having a display area (AA) and a non-display area (NA), comprising a substrate substrate (1), a first touch layer (52), a touch insulation layer (53) and a second touch layer (54) arranged in layers; the first touch layer (52) comprises a first touch trace (521); the touch insulation layer (53) is provided with a via hole (531), and the via hole (531) is at least partially located in the non-display area (NA); the second touch layer (54) comprises a second touch trace (541), the unit length resistance of the second touch trace (541) is different from that of the first touch trace (521), and the second touch trace (541) is at least partially located in the non-display area (NA), the orthographic projection of the second touch trace (541) and the first touch trace (521) on the substrate substrate at least partially overlaps, and the second touch trace (541) is connected with the first touch trace (521) through the via hole (531); a part of the first touch trace (521) and / or the second touch trace (541) connected with the functional structure (7) of the display panel forms a connecting part (71), and the via hole (531) is at least located on the side of the connecting part (71) away from the functional structure (7). The touch signal consistency of the display panel is good.

Description

Technical Field

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

[0002] Organic light-emitting diode (OLED) display panels have become the mainstream development direction in the display technology field due to their advantages such as self-illumination, high brightness, good image quality, and low power consumption. On-cell technology will gradually replace the existing external touch screen panel (TSP) method. On-cell technology is an integrated touch display technology that uses photolithography to form touch electrodes and wiring on the encapsulation layer.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a display panel and display device.

[0005] According to one aspect of this disclosure, a display panel is provided, including a display area and a non-display area located at least one side of the display area, the display panel comprising:

[0006] Substrate;

[0007] A first touch layer is disposed on one side of the substrate, and the first touch layer includes a first touch trace, the first touch trace being at least partially located in the non-display area;

[0008] A touch insulating layer is disposed on the side of the first touch layer opposite to the substrate, and at least one via is provided on the touch insulating layer, wherein the via is at least partially located in the non-display area;

[0009] A second touch layer is disposed on the side of the touch insulating layer opposite to the substrate. The second touch layer includes a second touch trace. The resistance per unit length of the second touch trace is different from that of the first touch trace. The second touch trace is at least partially located in the non-display area. The orthographic projection of the second touch trace on the substrate overlaps at least partially with the orthographic projection of the first touch trace on the substrate. The second touch trace is connected to the first touch trace through the via.

[0010] Wherein, a portion of the first touch trace and / or the second touch trace that is connected to at least one functional structure of the display panel forms a connection portion, and the at least one via is located at least on the side of the connection portion away from the functional structure.

[0011] In one exemplary embodiment of this disclosure, the at least one functional structure includes:

[0012] A touch electrode is connected to the first touch trace and / or the second touch trace and is located in the display area. The connection portion of the touch electrode to the first touch trace and / or the second touch trace has a start point and an end point.

[0013] In one exemplary embodiment of this disclosure, the at least one via includes:

[0014] The first via is located on the side of the starting point away from the ending point.

[0015] In one exemplary embodiment of this disclosure, the at least one via further includes:

[0016] The second via is located on the side of the end point closer to the start point.

[0017] In one exemplary embodiment of this disclosure, the orthographic projection of the second via on the substrate at least partially overlaps with the orthographic projection of the end point on the substrate.

[0018] In one exemplary embodiment of this disclosure, the at least one via further includes:

[0019] At least one third via is located between the first via and the second via.

[0020] In one exemplary embodiment of this disclosure, the first touch trace includes:

[0021] Part One;

[0022] The second part is connected to the first part, and the width of the second part is smaller than the width of the first part;

[0023] The second touch trace includes:

[0024] The third part, wherein the orthographic projection of the third part on the substrate at least partially overlaps with the orthographic projection of the first part on the substrate;

[0025] The fourth part is connected to the third part, and the orthographic projection of the fourth part on the substrate at least partially overlaps with the orthographic projection of the second part on the substrate, and the width of the fourth part is smaller than the width of the third part;

[0026] The first part and / or the third part are connected to the touch electrode, and the third part is connected to the first part through the first via, the second via, and the third via.

[0027] In one exemplary embodiment of this disclosure, the first portion and / or the third portion are connected to the edge of the touch electrode near the non-display area, and multiple first portions and / or multiple third portions are located on the same line (parallel to each other).

[0028] In one exemplary embodiment of this disclosure, the touch electrode is a touch driving electrode or a touch sensing electrode, and the touch electrode is disposed on the second touch layer.

[0029] In one exemplary embodiment of this disclosure, the non-display area includes a peripheral area, a bent area, and a bonding area, wherein the peripheral area is closer to the display area, the bonding area is farther from the display area, and the bent area is located between the peripheral area and the bonding area; the display panel further includes:

[0030] A display substrate is disposed between the substrate and the first touch layer. The display substrate includes a source-drain layer, and the source-drain layer includes connecting wires. The connecting wires are disposed in the bending region and extend to the peripheral region and the bonding region. The connecting wires are at least one functional structure.

[0031] In one exemplary embodiment of this disclosure, the at least one via further includes:

[0032] The fourth via is located in the surrounding area and is positioned close to the bending area. The second touch trace is connected to the first touch trace through the fourth via.

[0033] In an exemplary embodiment of this disclosure, a first transition via is further provided on the touch insulating layer. The first transition via is located in the peripheral area and is disposed near the bending area. The second touch trace is connected to the connecting wire through the first transition via. The first transition via is located on the side of the fourth via near the bending area.

[0034] In one exemplary embodiment of this disclosure,

[0035] The first touch trace also includes:

[0036] The fifth part is located in the binding area;

[0037] The second touch trace also includes:

[0038] The sixth part is located in the bonding area, and the orthographic projection of the sixth part on the substrate at least partially overlaps with the orthographic projection of the fifth part on the substrate.

[0039] The touch insulating layer is also provided with a second adapter via, which is located in the bonding area and close to the bending area. The sixth part is connected to the connecting wire through the second adapter via.

[0040] In one exemplary embodiment of this disclosure, the at least one via further includes:

[0041] The fifth via is located in the binding area and is disposed near the bending area. The sixth part is connected to the fifth part through the fifth via. The second transition via is located on the side of the fifth via that is close to the bending area.

[0042] In one exemplary embodiment of this disclosure, the display panel further includes:

[0043] A bonding pin is located in the bonding area;

[0044] The touch insulating layer is also provided with a third adapter via, which is connected to the bonding pin. The sixth part is connected to the connecting wire through the third adapter via, and the bonding pin is the at least one functional structure.

[0045] In one exemplary embodiment of this disclosure, the at least one via further includes:

[0046] The sixth via is located in the bonding area and is positioned close to the bonding pin. The sixth part is connected to the fifth part through the sixth via. The sixth via is located on the side of the third transition via that is close to the bending area.

[0047] In one exemplary embodiment of this disclosure, the extension direction of the bonding pin intersects with the extension direction of the sixth portion.

[0048] In one exemplary embodiment of this disclosure, the display substrate includes:

[0049] An active layer is disposed on one side of the substrate.

[0050] A gate insulating layer is disposed on the side of the active layer opposite to the substrate.

[0051] A gate is disposed on the side of the gate insulating layer opposite to the substrate.

[0052] An interlayer dielectric layer is disposed on the side of the gate opposite to the substrate.

[0053] A first source-drain layer is disposed on the side of the interlayer dielectric layer away from the substrate. The first source-drain layer includes a source and a drain, and the source and the drain are electrically connected to the active layer.

[0054] A planarization layer is disposed on the side of the first source / drain layer away from the substrate.

[0055] A second source / drain layer is disposed on the side of the planarization layer opposite to the substrate. The second source / drain layer includes a connection structure and a connection wire. The connection structure and the connection wire are spaced apart. The connection structure is electrically connected to the source or the drain.

[0056] A passivation layer is disposed on the side of the second source / drain layer away from the substrate.

[0057] In one exemplary embodiment of this disclosure, the display substrate further includes:

[0058] A first electrode is disposed on the side of the passivation layer opposite to the substrate, and the first electrode is electrically connected to the connection structure.

[0059] A pixel definition layer is disposed on the side of the first electrode away from the substrate, and an opening is provided on the pixel definition layer;

[0060] The light-emitting layer group is disposed on the side of the pixel definition layer opposite to the substrate, and is at least partially located within the opening;

[0061] The second electrode is disposed on the side of the light-emitting layer group away from the substrate.

[0062] An encapsulation layer assembly is disposed on the side of the second electrode opposite to the substrate, and the first touch layer is disposed on the side of the encapsulation layer assembly opposite to the substrate.

[0063] According to another aspect of this disclosure, a display device is provided, comprising the display panel described in any of the preceding claims.

[0064] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0065] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0066] Figure 1 This is a schematic diagram of the area division structure of the display panel of this disclosure.

[0067] Figure 2 for Figure 1 A schematic diagram of the structure of the display panel after it has been bent.

[0068] Figure 3 for Figure 1 A cross-sectional view of an example embodiment of the display panel display area.

[0069] Figure 4 This is a top view of an example embodiment of the touch layer group of the display panel of this disclosure.

[0070] Figure 5 This is a top view of another example embodiment of the touch layer group of the display panel of this disclosure.

[0071] Figure 6 In accordance with Figure 4 A schematic diagram of the cross-section after section II.

[0072] Figure 7 for Figure 4 A schematic diagram of the structure of the touch pattern in the image.

[0073] Figure 8 for Figure 7 A schematic diagram showing the connection between the touch pattern in the middle and the surrounding touch detection lead 62.

[0074] Figure 9 In accordance with Figure 8 A cross-sectional view of the MM section.

[0075] Figure 10 for Figure 8 A magnified view of the portion indicated by G in the diagram.

[0076] Figure 11 for Figure 8 A magnified view of the portion indicated by H in the middle.

[0077] Figure 12 This is a schematic diagram of the structure of the bent area and both sides of the display panel in this disclosure.

[0078] Figure 13 In accordance with Figure 12 A cross-sectional view after CC sectioning.

[0079] Figure 14 This is a schematic diagram of the structure of the panel binding area shown in this disclosure.

[0080] Figure 15 In accordance with Figure 12 A cross-sectional view of DD after it has been cut.

[0081] Figure 16 for Figure 1 A cross-sectional view of another example implementation within the display panel area.

[0082] Explanation of reference numerals in the attached figures:

[0083] 1. Substrate;

[0084] 2. Drive backplane; 21. Light-shielding layer; 22. Buffer layer; 23. Active layer; 24. Gate insulating layer; 25. Gate; 26. Interlayer dielectric layer; 27. First source-drain layer; 271. Source; 272. Drain; 273. Connecting wire; 28. Passivation layer; 29. ​​Planarization layer; 30. Second source-drain layer; 301. Connection structure;

[0085] 3. Light-emitting substrate; 31. First electrode; 32. Pixel definition layer; 33. Light-emitting layer group; 34. Second electrode;

[0086] 4. Encapsulation layer group;

[0087] 5. Touch layer group; 51. Barrier layer;

[0088] 52. First touch layer; 521. First touch trace; 5211. First part; 5212. Second part; 5213. Fifth part;

[0089] 53. Touch insulating layer; 531. Via; 5311. First via; 5312. Second via; 5313. Third via; 5314. Fourth via; 5315. Fifth via; 5316. Sixth via; 5317. First adapter hole; 5318. Second adapter hole; 5319. Third adapter hole;

[0090] 54. Second touch layer; 541. Second touch trace; 5411. Third part; 5412. Fourth part; 5413. Sixth part; 542. Touch electrode; 55. Protective layer; 56. Touch pattern; 561. Dummy part;

[0091] 61. Touch detection electrode; 611. First touch unit; 6111. First touch electrode; 6112. First connecting part; 612. Second touch unit; 6121. Second touch electrode; 6122. Second connecting part; 62. Touch detection lead; 621. First touch detection lead; 622. Second touch detection lead;

[0092] 7. Functional structure; 71. Connecting part; 711. Starting point; 712. Ending point;

[0093] 75. Bind pins;

[0094] 8. Polarizing film; 9. Cover plate; 10. Display driver chip; 11. Flexible printed circuit board; 12. Touch driver chip;

[0095] AA, Display area; NA, Non-display area; ZB, Peripheral area; ZB1, First peripheral area; ZB2, Second peripheral area; ZB3, Third peripheral area; ZB4, Fourth peripheral area; BEND, Bending area; BOD, Binding area;

[0096] X, the first direction; Y, the second direction. Detailed Implementation

[0097] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0098] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0099] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0100] In this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Furthermore, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0101] This disclosure provides an example embodiment of a display panel, with reference to... Figures 1-15 As shown, the display panel includes a display area AA and a non-display area NA located on at least one side of the display area AA. The display panel may include a substrate 1, a first touch layer 52, a touch insulating layer 53, and a second touch layer 54. The first touch layer 52 is disposed on one side of the substrate 1 and includes a first touch trace 521, at least partially located in the non-display area NA. The touch insulating layer 53 is disposed on the side of the first touch layer 52 away from the substrate 1 and has at least one via 531, at least partially located in the non-display area NA. The second touch layer 54 is disposed on the side of the touch insulating layer 53 away from the substrate 1. The second touch layer 54 includes a second touch trace 541. The resistance per unit length of the second touch trace 541 is different from that of the first touch trace 521. The second touch trace 541 is at least partially located in the non-display area NA. The orthographic projection of the second touch trace 541 on the substrate 1 at least partially overlaps with the orthographic projection of the first touch trace 521 on the substrate 1. The second touch trace 541 is connected to the first touch trace 521 through a via 531. The first touch trace 521 and / or the second touch trace 541 are connected to at least one functional structure 7 of the display panel to form a connection portion 71. At least one via 531 is located at least on the side of the connection portion 71 away from the functional structure 7.

[0102] The display panel disclosed herein, on the one hand, sets at least a portion of the peripheral touch detection lead 62 as a double-layer structure including a first touch trace 521 and a second touch trace 541, and connects the first touch trace 521 and the second touch trace 541 through a via 531, thereby reducing the resistance of the peripheral touch detection lead 62 and improving the touch effect.

[0103] On the other hand, the first touch trace 521 and / or the second touch trace 541 are connected to the functional structure 7 of the display panel to form a connection portion 71. The via 531 is located at least on the side of the connection portion 71 away from the functional structure 7, so that even if the unit length resistance of the second touch trace 541 is different from that of the first touch trace 521, and the attenuation of the same touch driving signal is inconsistent between the first touch trace 521 and the second touch trace 541, the touch driving signal on the first touch trace 521 and the touch driving signal on the second touch trace 541 are merged at the via 531, so that the touch driving signal input to the functional structure 7 is consistent; moreover, the touch sensing signal output from the functional structure 7 is simultaneously transmitted to the first touch trace 521 and the second touch trace 541, ensuring that the initial data of the touch sensing signal transmitted on the first touch trace 521 and the initial data of the touch sensing signal transmitted on the second touch trace 541 are consistent.

[0104] On the other hand, similarly, ensuring the consistency of the entire transmission process of the touch sensing signal and the touch driving signal on the first touch trace 521 and the second touch trace 541 avoids different touch sensing signals and touch driving signals being transmitted to the functional structure 7 of the display panel, thus avoiding affecting the touch effect.

[0105] Reference Figure 1 As shown, the display panel may include a display area AA for displaying images and a non-display area NA for not displaying images. Touch functionality can be implemented in the display area AA. The non-display area NA may include a peripheral area ZB, which may be arranged around the display area AA; it may also include a bending area BEND for bending and a binding area BOD for binding. The bending area BEND is connected to the peripheral area ZB, and the binding area BOD is connected to the bending area BEND.

[0106] The peripheral area ZB may include a first peripheral area ZB1, a second peripheral area ZB2, a third peripheral area ZB3, and a fourth peripheral area ZB4. The first peripheral area ZB1 and the second peripheral area ZB2 are located on opposite sides of the display area AA in the second direction Y. The third peripheral area ZB3 and the fourth peripheral area ZB4 are located on opposite sides of the display area AA in the first direction X. A binding area BOD is located on the side of the second peripheral area ZB2 furthest from the display area AA. Specifically, a bending area BEND is connected to the second peripheral area ZB2, and the binding area BOD is connected to the bending area BEND, meaning the bending area BEND is connected between the binding area BOD and the second peripheral area ZB2.

[0107] Reference Figure 2As shown, the display panel can be bent in the bending area BEND, so that the binding area BOD is bent on the side of the display area AA that is away from the display surface.

[0108] Reference Figure 1 , Figure 4 and Figure 5 As shown, a bonding area BOD has bonding pins 75, on which external devices can be mounted (or attached). These external devices may include a display driver chip 10, a touch driver chip 12, a flexible printed circuit board 11, or a rigid printed circuit board, etc. Additionally, chip-on-flex (COF), connectors, etc., may also be mounted on the bonding pins 75 as external devices. One or more external devices may be mounted in the bonding area BOD. The display driver chip 10 may be disposed in the bonding area BOD of the display panel, and the printed circuit board may be attached to the end of the bonding area BOD. In this case, the display panel may include bonding pins 75 connected to the display driver chip 10 and bonding pins 75 connected to the printed circuit board. In another embodiment, the display driver chip 10 may be mounted on a chip-on-flex film, and this chip-on-flex film may be attached to the bonding area BOD of the display panel.

[0109] Reference Figure 1 As shown, the display driver chip 10 can be mounted on the same surface of the display panel as the display surface. The touch driver chip 12 can be mounted on the same surface of the flexible printed circuit board 11 as the display surface. (Refer to...) Figure 2 As shown, when the bending area BEND is bent in reverse, the display driver chip 10 and the touch driver chip 12 are located on the side of the display panel away from the display surface.

[0110] The touch driver chip 12 can be bonded to the flexible printed circuit board 11 using anisotropic conductive adhesive, or it can be attached to the flexible printed circuit board 11 via ultrasonic bonding. The width of the flexible printed circuit board 11 in the first direction X can be smaller than the width of the display panel in the first direction X. The width of the touch driver chip 12 in the first direction X can be smaller than the width of the flexible printed circuit board 11 in the first direction X.

[0111] The touch driver chip 12 may include an integrated circuit that drives the touch layer group 5. In one embodiment, the integrated circuit may be a touch driver integrated circuit that generates and provides touch driving signals, but the present invention is not limited thereto. The touch driver chip 12 is connected to the bonding pin 75 of the display panel to provide touch driving signals to the bonding pin 75 and to receive touch sensing signals fed back from the touch layer group 5.

[0112] Reference Figure 3As shown, the display panel may include a display substrate, which may include a driving backplate 2 and a light-emitting substrate 3. The driving backplate 2 is disposed on one side of the substrate 1, and the light-emitting substrate 3 is disposed on the side of the driving backplate 2 away from the substrate 1. A touch layer group 5 may be disposed on the light-emitting side of the display substrate, that is, a touch layer group 5 may be disposed on the side of the light-emitting substrate 3 away from the substrate 1. A polarizer 8 may be disposed on the side of the touch layer group 5 away from the display substrate, and a cover plate 9 may be disposed on the side of the polarizer 8 away from the display substrate.

[0113] Display substrates can be OLED (Organic Electroluminescence Display) substrates, QLED (Quantum Dot Light Emitting Diodes) substrates, etc. A display substrate has a light-emitting side and a non-light-emitting side, which are arranged opposite each other. The image is displayed on the light-emitting side, and this side is called the display surface. OLED display substrates possess characteristics such as self-emissiveness, high brightness, wide viewing angle, fast response time, and the ability to manufacture full-color (RGB) components, thus being considered a star product for next-generation displays.

[0114] The following explanation uses OLED as an example.

[0115] Reference Figure 3 As shown, the display substrate may include a driving backplate 2 and a light-emitting substrate 3. The driving backplate 2 may include multiple driving circuits arranged in an array, and the light-emitting substrate 3 may include multiple light-emitting devices arranged in an array. The driving circuits can drive the light-emitting devices to emit light.

[0116] In this example implementation, refer to Figure 3 As shown, the display substrate may include a substrate 1. The material of the substrate 1 may include inorganic materials, such as glass, quartz, or metal. The material of the substrate 1 may also include organic materials, such as resins like polyimide, polycarbonate, polyacrylate, polyetherimide, polyethersulfone, polyethylene terephthalate, and polyethylene naphthalate. The substrate 1 may be formed from multiple material layers; for example, the substrate 1 may include multiple base layers, and the base layers may be made of any of the materials described above. Alternatively, the substrate 1 may be a single layer, and may be any of the materials described above.

[0117] A light-shielding layer 21 can also be provided on one side of the substrate 1. Light entering the active layer 23 from the substrate 1 will generate photogenerated carriers in the active layer 23, which will have a huge impact on the characteristics of the thin film transistor and ultimately affect the display quality of the display device. The light-shielding layer 21 can block the light entering from the substrate 1, thereby avoiding the impact on the characteristics of the thin film transistor and avoiding the impact on the display quality of the display device.

[0118] A buffer layer 22 can also be formed on the side of the light-shielding layer 21 away from the substrate 1. The buffer layer 22 serves to block water vapor and impurity ions in the substrate 1 (especially organic materials) and to increase hydrogen ions for the subsequently formed active layer 23. The buffer layer 22 is made of insulating material, which can insulate and isolate the light-shielding layer 21 from the active layer 23.

[0119] A source layer 23 is disposed on the side of the buffer layer 22 away from the substrate 1. The source layer 23 may include a channel portion and conductor portions disposed at both ends of the channel portion. A gate insulating layer 24 is disposed on the side of the source layer 23 away from the substrate 1. A gate 25 is disposed on one side of the gate insulating layer 24. An interlayer dielectric layer 26 is disposed on the side of the gate 25 away from the substrate 1. A via is disposed on the interlayer dielectric layer 26, and the via connects to the conductor portion. A first source-drain layer 27 is disposed on the side of the interlayer dielectric layer 26 away from the substrate 1. In the display area AA, the first source-drain layer 27 may include a source 271 and a drain 272. The source 271 and drain 272 are respectively connected to two conductor portions through two vias. A passivation layer 28 is disposed on the side of the source 271 and drain 272 away from the substrate 1. A via is disposed on the passivation layer 28, and the via connects to the source 271. The active layer 23, gate 25, source 271 and drain 272 form a thin film transistor.

[0120] Reference Figure 16 As shown, in some other exemplary embodiments of this disclosure, a planarization layer 29 is provided on the side of the first source-drain layer 27 facing away from the substrate 1, and vias are also provided on the planarization layer 29; a second source-drain layer 30 is provided on the side of the planarization layer 29 facing away from the substrate 1, and the second source-drain layer 30 in the display area AA may include a connection structure 301, which is connected to the source 271 through the vias on the planarization layer 29. Of course, a third source-drain layer, a fourth source-drain layer, etc., may also be provided as needed.

[0121] It should be noted that the thin-film transistor described in this specification is a top-gate thin-film transistor. In other exemplary embodiments of this disclosure, the thin-film transistor may also be a bottom-gate or dual-gate type, and its specific structure will not be described in detail here. Moreover, in cases where thin-film transistors with opposite polarities are used or where the current direction changes during circuit operation, the functions of the "source 271" and "drain 272" are sometimes interchanged. Therefore, in this specification, the "source 271" and "drain 272" can be interchanged.

[0122] Please continue to refer to Figure 3 and Figure 16 As shown, a light-emitting substrate 3 is disposed on the side of the passivation layer 28 away from the substrate 1. The light-emitting substrate 3 may include a first electrode 31, a pixel definition layer 32, a light-emitting layer group 33, and a second electrode 34.

[0123] Specifically, a first electrode 31 is provided on the side of the passivation layer 28 away from the substrate 1. The first electrode 31 is connected to the source electrode 271 of the driving backplate 2 through a through hole. The first electrode 31 can be an anode (pixel electrode).

[0124] A pixel definition layer 32 is disposed on the side of the first electrode 31 away from the substrate 1. An opening is provided on the pixel definition layer 32, and a light-emitting layer group 33 is disposed within the opening. A second electrode 34 is disposed on the side of the light-emitting layer group 33 away from the substrate 1. The second electrode 34 can be a cathode (common electrode) and is connected to the ground line VSS. Each opening of the light-emitting layer group 33 emits light to form a sub-pixel. Therefore, each opening of the light-emitting layer group 33 constitutes a sub-pixel, such that the orthographic projection of the sub-pixel onto the display substrate is the orthographic projection of the light-emitting layer group 33 onto the display substrate. The display substrate may include multiple sub-pixels.

[0125] The light-emitting layer group 33 may include a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer stacked sequentially. The hole injection layer is in contact with the first electrode 31, and the electron injection layer is in contact with the second electrode 34. Of course, in other exemplary embodiments of this disclosure, the light-emitting layer group 33 may only include a hole transport layer, a light-emitting layer, and an electron transport layer. The light-emitting layer group 33 may also have other structures, and its specific structure can be set as needed.

[0126] An encapsulation layer group 4 is disposed on the side of the second electrode 34 away from the substrate 1. The encapsulation layer group 4 can be configured as multiple layers, and may include organic layers and inorganic layers. Specifically, the encapsulation layer group 4 may include a first inorganic layer, an organic layer disposed on the side of the first inorganic layer away from the substrate 1, and a second inorganic layer disposed on the side of the organic layer away from the substrate 1. The materials of the first inorganic layer, the organic layer, and the second inorganic layer will not be described in detail here. Of course, the encapsulation layer group 4 may also include more or fewer layers.

[0127] In this example implementation, please refer to Figure 3 and Figure 16 As shown, a touch layer group 5 is disposed on the side of the encapsulation layer group 4 away from the substrate 1. The touch layer group 5 may include a barrier layer 51, a first touch layer 52, a touch insulating layer 53, a second touch layer 54, and a protective layer 55. The barrier layer 51 is disposed on the side of the encapsulation layer group 4 away from the substrate 1, and the material of the barrier layer 51 is generally SiNx. The first touch layer 52 is disposed on the side of the barrier layer 51 away from the substrate 1, and the first touch layer 52 may be a Ti / Al / Ti three-layer structure, an ITO / Ag / ITO three-layer structure, etc. The touch insulating layer 53 is disposed on the side of the first touch layer 52 away from the substrate 1, and the material of the touch insulating layer 53 is generally SiNx. The second touch layer 54 is disposed on the side of the touch insulating layer 53 away from the substrate 1, and the second touch layer 54 may be a Ti / Al / Ti, an ITO / Ag / ITO three-layer structure, etc. The protective layer 55 is disposed on the side of the second touch layer 54 away from the substrate 1, and the material of the protective layer 55 is PI (polyimide). Of course, the materials and structures of the above-mentioned membranes are just examples, and can be selected and set as needed.

[0128] Reference Figure 3 and Figure 16 As shown, the first touch layer 52 and the second touch layer 54 are configured as a conductive mesh structure, that is, the first touch layer 52 and the second touch layer 54 are formed by multiple meshes formed by interwoven metal wires, and the mesh is a polygon composed of multiple mesh lines. One mesh corresponds to one sub-pixel, and the orthographic projection of the sub-pixel on the substrate 1 is located within the orthographic projection of the mesh on the substrate 1, so as to avoid the mesh lines blocking the light emitted by the sub-pixel and ensure the display effect of the display panel. Moreover, the orthographic projection of the first electrode 31 on the substrate 1 is located within the orthographic projection of the mesh on the substrate 1.

[0129] Reference Figure 4 and Figure 5As shown, a conductive mesh structure forms the touch detection electrode 61. The touch detection electrode 61 can be a mutual capacitance structure. The touch detection electrode 61 can include multiple first touch units 611 and multiple second touch units 612. The first touch units 611 and second touch units 612 also include multiple meshes, which are polygons composed of multiple mesh lines. The metal mesh-type first touch units 611 and second touch units 612 have advantages such as low resistance, small thickness, and fast response speed.

[0130] Reference Figure 4 and Figure 5 As shown, the second touch unit 612 has a linear shape extending along a first direction X, and a plurality of second touch units 612 are arranged sequentially along a second direction Y. The first touch unit 611 has a linear shape extending along the second direction Y, and a plurality of first touch units 611 are arranged sequentially along the first direction X, which intersects with the second direction Y. Each first touch unit 611 may include a plurality of first touch electrodes 6111 and a first connecting portion 6112 arranged sequentially along the second direction Y. The plurality of first touch electrodes 6111 are spaced apart, and adjacent first touch electrodes 6111 are connected to each other through the first connecting portion 6112. Each second touch unit 612 may include a plurality of second touch electrodes 6121 and a second connecting portion 6122 arranged sequentially along the first direction X. The plurality of second touch electrodes 6121 are spaced apart, and adjacent second touch electrodes 6121 are connected to each other through the second connecting portion 6122.

[0131] In some example implementations, refer to Figure 6 As shown, the first touch electrode 6111, the second touch electrode 6121, and the second connecting portion 6122 are disposed on the same layer and can be formed by a single patterning process. The second touch electrode 6121 and the second connecting portion 6122 are integral structures, while the first connecting portion 6112 can be disposed on the bridging layer to form a bridging structure. A touch insulating layer 53 is disposed between the first connecting portion 6112 and the second connecting portion 6122.

[0132] For example, the second touch layer 54 may include a first touch electrode 6111, a second touch electrode 6121 (not shown in the figure), and a second connecting portion 6122. The second touch electrode 6121 and the second connecting portion 6122 are connected as one unit within the second touch layer 54. Moreover, a gap is provided between the first touch electrode 6111, the second touch electrode 6121, and the second connecting portion 6122, which is achieved by breaking lines in the metal mesh. The first touch layer 52 may include a first connecting portion 6112, which is connected to two adjacent first touch electrodes 6111 through a through-hole provided on the touch insulating layer 53, thereby achieving the purpose of connecting multiple first touch electrodes 6111 arranged sequentially along the second direction Y into one unit.

[0133] Since the driving backplate 2 needs to be connected to an electrical signal, the first touch electrode 6111, the second touch electrode 6121, and the second connecting portion 6122 also need to be connected to an electrical signal. The first touch electrode 6111, the second touch electrode 6121, and the second connecting portion 6122 are further away from the driving backplate 2 relative to the first touch layer 52, reducing interference between the driving backplate 2 and the first touch electrode 6111, the second touch electrode 6121, and the second connecting portion 6122, thus ensuring the display and touch effects of the display panel. Of course, in other exemplary embodiments of this disclosure, the first touch layer 52 may also include the first touch electrode 6111, the second touch electrode 6121, and the second connecting portion 6122, and the second touch layer 54 may also include the first connecting portion 6112.

[0134] In some other example embodiments, the first touch electrode 6111, the first connecting portion 6112, and the second touch electrode 6121 are disposed on the same layer and can be formed by a single patterning process. The first touch electrode 6111 and the first connecting portion 6112 are integral structures, and the second connecting portion 6122 can be disposed on a bridging layer to form a bridging structure. An insulating layer is disposed between the first connecting portion 6112 and the second connecting portion 6122.

[0135] For example, the second touch layer 54 may include a first touch electrode 6111, a second touch electrode 6121, and a first connecting portion 6112. The first touch electrode 6111 and the first connecting portion 6112 are connected as a single unit within the second touch layer 54. Furthermore, a gap is provided between the second touch electrode 6121 and the first touch electrode 6111 and the first connecting portion 6112, and this gap is achieved by interrupting the lines of a metal mesh. The first touch layer 52 may include a second connecting portion 6122, which is connected to two adjacent second touch electrodes 6121 through a fourth through-hole 5314 provided on the touch insulating layer 53, thereby achieving the purpose of connecting a plurality of second touch electrodes 6121 arranged sequentially along the first direction X into a single unit. Of course, in some other exemplary embodiments of this disclosure, the first touch layer 52 may also include the first touch electrode 6111, the second touch electrode 6121, and the first connecting portion 6112, and the second touch layer 54 may also include the second connecting portion 6122.

[0136] In some example implementations, the first touch electrode 6111 can be a driving electrode, and the second touch electrode 6121 can be a sensing electrode. Alternatively, the first touch electrode 6111 can be a sensing electrode, and the second touch electrode 6121 can be a driving electrode. A plurality of first touch units 611 and a plurality of second touch units 612 constitute M rows of driving electrodes * N columns of sensing electrodes, that is, including M first touch units 611 and N second touch units 612, where M and N are positive integers greater than two.

[0137] In some exemplary embodiments, the first touch electrode 6111 and the second touch electrode 6121 may have a rhomboid shape, such as a regular rhombus, a horizontally elongated rhombus, or a vertically elongated rhombus. In some possible implementations, the first touch electrode 6111 and the second touch electrode 6121 may have any one or more of the following shapes: triangle, square, trapezoid, parallelogram, pentagon, hexagon, and other polygons, which are not limited herein.

[0138] Reference Figure 4 As shown, in the surrounding area ZB, an outer touch detection lead 62 is provided. The outer touch detection lead 62 may include a first touch detection lead 621 and a second touch detection lead 622 (for clarity, different leads in the figure are distinguished by different line types).

[0139] A portion of the first touch detection lead 621 has its first end connected to one end of the first touch unit 611, and its second end leads out to and connects to the bonding pin 75. Another portion of the first touch detection lead 621 has its first end connected to the opposite end of the first touch unit 611, and its second end leads out to and connects to the bonding pin 75.

[0140] Reference Figure 4 As shown, the first end of the second touch detection lead 622 is connected to one end of the second touch unit 612, and the second end of the second touch detection lead 622 is led out to the bonding pin 75 and connected to the bonding pin 75. This wiring method can also be called 2T1R (the first touch unit 611 is a touch driving unit, and the second touch unit 612 is a touch sensing unit), or it can be 1T2R (the first touch unit 611 is a touch sensing unit, and the second touch unit 612 is a touch driving unit).

[0141] Understandably, the first touch electrodes 6111 located in the same row are arranged sequentially along the second direction Y (the long side of the display area AA). A row of first touch units 611 includes a relatively large number of first touch electrodes 6111. The touch signal starts from the first first touch electrode 6111 coupled to the first touch detection lead 621 and is transmitted sequentially along the row of first touch electrodes 6111 in a direction away from the first touch detection lead 621. However, as the transmission distance increases, the touch signal gradually attenuates. Therefore, when the number of first touch electrodes 6111 is large, coupling both ends of the first touch electrodes 6111 in the same row to the first touch detection lead 621 ensures that the first touch electrode 6111 furthest from the first touch detection lead 621 in the row receives the touch signal.

[0142] Figure 5 The wiring method shown can also be called 1T1R.

[0143] Of course, in some other exemplary embodiments of this disclosure, the second touch detection lead 622 can be configured as two parts. One part of the second touch detection lead 622 has its first end connected to one end of the second touch unit 612, and its second end leads out to and connects to the binding pin 75. The other part of the second touch detection lead 622 has its first end connected to the opposite end of the second touch unit 612, and its second end leads out to and connects to the binding pin 75.

[0144] This wiring method can also be called 2T2R. This wiring method can ensure that among the row of touch electrodes 542 coupled to the touch detection lead 62, the touch electrodes 542 that are farther away from the touch lead receive touch signals and the touch electrodes 542 that are closer to the touch lead receive touch signals that are not much different, thus ensuring the touch accuracy of relatively large touch screens.

[0145] In some example implementations, refer to Figure 4 As shown, a portion of the first touch detection lead 621 has its first end connected to one end of the first touch unit 611 adjacent to the bonding area BOD. The first touch detection lead 621 only needs to pass through the second peripheral area ZB2 to allow its second end to be directly led out to the bonding pin 75. Another portion of the first touch detection lead 621 has its first end connected to one end of the first touch unit 611 away from the bonding area BOD. This portion of the first touch detection lead 621 needs to pass through the first peripheral area ZB1, the fourth peripheral area ZB4, and the second peripheral area ZB2 to allow its second end to be led out to the bonding pin 75.

[0146] A portion of the first end of the second touch detection lead 622 is connected to one end of the second touch unit 612. The second touch detection lead 622 needs to pass through the third peripheral area ZB3 and the second peripheral area ZB2 before the second end can be led out to the bonding pin 75.

[0147] When one end of the second touch unit 612 is connected to the second touch detection lead 622, the first end of another part of the second touch detection lead 622 is connected to the opposite end of the second touch unit 612. This part of the second touch detection lead 622 needs to pass through the fourth peripheral area ZB4 and the second peripheral area ZB2 before the second end can be led out to the bonding pin 75.

[0148] Touch Principle: The second touch electrode 6121 and the first touch electrode 6111 can form a capacitor. Multiple first touch electrodes 6111 and multiple second touch electrodes 6121 can form multiple capacitors (e.g., C1, C2, C3, etc.). Each capacitor is located at a different position in the touch detection electrode 61; that is, in a coordinate system formed by the first direction X and the second direction Y, each capacitor is located at a different point. The touch driver chip 12 transmits a touch driving signal (e.g., a trigger signal) to the first touch detection lead 621, which is then transmitted to the first touch electrode 6111. At this time, each capacitor at the aforementioned different positions will have an initial capacitance value. Since the human body is a conductor, when a person's finger touches a certain position on the display panel, the capacitance value of the capacitor at that position will change. Based on the amount of change in capacitance value, the second touch electrode 6121 at that position will receive a corresponding touch sensing signal (e.g., a receive signal). The touch sensing signal on the second touch electrode 6121 at this location is transmitted to the touch driver chip 12 through the second touch detection lead 622. Meanwhile, the capacitance value of the capacitor at the untouched location remains unchanged. Therefore, by determining the capacitance value of each capacitor, the touch point can be identified, thereby realizing the touch function.

[0149] Figure 4 The first touch electrode 6111 and the second touch electrode 6121 within the dashed rectangle form a complete touch pattern 56. (Refer to...) Figure 7 The schematic diagram of the touch pattern 56 shown illustrates a dummy part 561 within the first touch electrode 6111, spaced apart from it. A dummy part 561 is also provided within the second touch electrode 6121, spaced apart from it as well. The dummy part 561 is merely for ease of setup and manufacturing; it does not receive touch signals and therefore does not need to be connected to the first touch trace 521 or the second touch trace 541. The spacing between the dummy part 561 and the first and second touch electrodes 6111 and 6121 is achieved through broken lines in the grid.

[0150] Reference Figure 4 and Figure 5As shown, because all peripheral touch detection leads 62 need to be connected to the bonding pin 75, the number of peripheral touch detection leads 62 increases closer to the bonding area BOD. This results in the third peripheral area ZB3, the fourth peripheral area ZB4, and the second peripheral area ZB2, which are close to the bonding area BOD, needing to accommodate a large number of peripheral touch detection leads 62. Given the narrow bezel requirement, in order to accommodate all peripheral touch detection leads 62 in the peripheral area ZB, the width of the peripheral touch detection leads 62 must be designed to be narrower, with a width greater than or equal to 3 microns. The width of the peripheral touch detection lead 62 is less than or equal to 50 micrometers. For example, its width can be 5 micrometers, 8 micrometers, 12 micrometers, 16 micrometers, 20 micrometers, 25 micrometers, 30 micrometers, 24.5 micrometers, 29 micrometers, 35.7 micrometers, 41 micrometers, 48 ​​micrometers, etc. Moreover, the spacing between two adjacent peripheral touch detection leads 62 is relatively small. The spacing between two adjacent peripheral touch detection leads 62 is greater than or equal to 3 micrometers and less than or equal to 20 micrometers. For example, its width can be 5 micrometers, 8 micrometers, 9.5 micrometers, 10 micrometers, 12.7 micrometers, 14.5 micrometers, 18 micrometers, 20 micrometers, etc.

[0151] This configuration results in a relatively high resistance for the peripheral touch detection lead 62. To ensure the touch performance of the display panel, the power supply voltage of the display panel needs to be increased, leading to increased power consumption and hindering the design towards a thinner and lighter form factor. Therefore, referring to... Figure 8 and Figure 9 As shown, the peripheral touch detection lead 62 is configured as a double-layer structure, meaning it can include a first touch trace 521 and a second touch trace 541. The first touch trace 521 can be disposed in the first touch layer 52, and the second touch trace 541 can be disposed in the second touch layer 54. The first touch trace 521 and the second touch trace 541 are connected through a via 531 disposed in the touch insulating layer 53, thereby reducing the resistance of the peripheral touch detection lead 62. In other words, the first touch detection lead 621 can include both the first touch trace 521 and the second touch trace 541. The second touch detection lead 622 can also include both the first touch trace 521 and the second touch trace 541. This allows the first touch trace 521 and the second touch trace 541 to form a signal transmission path, transmitting the same touch signal.

[0152] The orthographic projection of the first touch trace 521 on the substrate 1 at least partially overlaps with the orthographic projection of the second touch trace 541 on the substrate 1. For example, the orthographic projection of the first touch trace 521 on the substrate 1 may be located within the orthographic projection of the second touch trace 541 on the substrate 1. The width of the first touch trace 521 may be equal to the width of the peripheral touch detection lead 62, and the width of the second touch trace 541 may be equal to the width of the peripheral touch detection lead 62. The spacing between two adjacent first touch traces 521 is equal to the spacing between two adjacent peripheral touch detection leads 62. The spacing between two adjacent second touch traces 541 is equal to the spacing between two adjacent peripheral touch detection leads 62. Since the second touch trace 541 needs to connect to the functional structure 7 of the display panel, its length can be greater than that of the first touch trace 521, so that the orthographic projection of the first touch trace 521 on the substrate 1 can be within the orthographic projection of the second touch trace 541 on the substrate 1. Of course, due to errors in processes, equipment, etc., the first touch trace 521 and the second touch trace 541 may be slightly misaligned in the width direction.

[0153] Of course, when the first touch trace 521 needs to be connected to the functional structure 7 of the display panel, the length of the first touch trace 521 can be greater than the length of the second touch trace 541. When both the first touch trace 521 and the second touch trace 541 need to be connected to the functional structure 7 of the display panel, the length of the first touch trace 521 can be approximately equal to the length of the second touch trace 541.

[0154] However, because the width of the first touch trace 521 and the width of the second touch trace 541 are designed to be relatively narrow, it is not possible to provide vias 531 on the touch insulating layer 53 at the set lengths of the first touch trace 521 and the second touch trace 541 as required, so as to connect the first touch trace 521 and the second touch trace 541.

[0155] Furthermore, due to errors in the process and equipment, the thickness of the first touch layer 52 is inconsistent with that of the second touch layer 54, which in turn makes the thickness of the first touch trace 521 and the thickness of the second touch trace 541 inconsistent. This results in the second touch trace 541 having a different resistance per unit length than the first touch trace 521. The resistance per unit length refers to the resistance per unit length of the conductor at a reference temperature. When the same touch driving signal is transmitted through the first touch trace 521 and the second touch trace 541 respectively, the attenuation of the touch driving signal through the first touch trace 521 and the second touch trace 541 is inconsistent, which will result in inconsistent touch driving signals input to the touch electrode 542 of the display area AA. Similarly, after a touch action occurs and a touch sensing signal is generated, when the same touch sensing signal is transmitted through the first touch trace 521 and the second touch trace 541 respectively, the attenuation of the touch sensing signal through the first touch trace 521 and the second touch trace 541 is inconsistent, which will result in inconsistent touch sensing signals input to the touch driver chip, thereby affecting the touch effect.

[0156] In this example implementation, refer to Figures 10-11 As shown, in the surrounding area ZB, the first touch trace 521 may include a first portion 5211 and a second portion 5212; the second portion 5212 is connected to the first portion 5211, and the width of the second portion 5212 is smaller than the width of the first portion 5211. The second touch trace 541 may include a third portion 5411 and a fourth portion 5412; the third portion 5411 is disposed opposite to the first portion 5211; the third portion 5411 is connected to the touch electrode 542. The fourth portion 5412 is connected to the third portion 5411, and the fourth portion 5412 is disposed opposite to the second portion 5212, and the width of the fourth portion 5412 is smaller than the width of the third portion 5411. The first portion 5211 is connected to the third portion 5411 through a first via 5311, a second via 5312, and a third via 5313.

[0157] By setting the width of the first part 5211 connected to the touch electrode 542 to be relatively wide, and also setting the width of the third part 5411 connected to the first part 5211 to be relatively wide, a first via 5311, a second via 5312, and a third via 5313 can be provided on the touch insulating layer 53 between the first part 5211 and the third part 5411 to ensure the connection between the first part 5211 and the third part 5411; and by setting the width of the second part 5212 and the width of the fourth part 5412 to be relatively narrow, the requirement of a narrow bezel for the display panel can be met.

[0158] Additionally, refer to Figure 4 and Figure 5As shown, the third part 5411 is connected to the edge of the peripheral area ZB of the touch electrode 542. The edges of the peripheral areas ZB of multiple touch electrodes 542 are on a line. Therefore, the multiple third parts 5411 connected to multiple touch electrodes 542 are on a line. So, in essence, only the width of the outer ring of touch detection leads 62 (first touch line 521 or second touch line 541) closest to the display area AA on one, two or three sides is set to be wider, while the other outer touch detection leads 62 can be set to be narrower, which can meet the requirements of narrow bezel of the display panel.

[0159] Of course, when the touch electrode 542 is disposed on the first touch layer 52, the first part 5211 is connected to the touch electrode 542. Alternatively, both the first part 5211 and the third part 5411 can be connected to the touch electrode 542.

[0160] A portion of the first touch trace 521 and / or the second touch trace 541 that connects to the functional structure 7 of the display panel forms a connection portion 71, and at least one via 531 is located at least on the side of the connection portion 71 away from the functional structure 7.

[0161] Reference Figures 8-11 As shown, in Figure 9 Since the second touch trace 541 is not connected to the dummy part 56, no cross-sectional lines are added to the dummy part 56 to distinguish it. Furthermore, the specific structure of the middle section is basically the same; therefore, the connection relationship between the starting point 711 and the ending point 712 is mainly reflected. Specifically, the functional structure 7 may include a touch electrode 542, which is located in the display area AA. The touch electrode 542 can be disposed on the second touch layer 54. Therefore, the touch electrode 542 is connected to the second touch trace 541, and the edges of the touch electrode 542 near the non-display area NA are all connected to the second touch trace 541, so that the touch electrode 542 is connected to the second touch trace 541 as a segment rather than a point. Therefore, the connection portion 71 between the touch electrode 542 and the second touch trace 541 has a starting point 711 and an ending point 712. With this configuration, touch driving signals are input or touch sensing signals are output at the edges of the touch electrode 542 near the non-display area NA, increasing the width of the signal transmission channel and thus reducing resistance; moreover, it ensures that touch driving signals are uniformly input to the touch electrode 542, or that touch sensing signals generated by the touch electrode 542 can be output.

[0162] Of course, in some other example embodiments of this disclosure, when the touch electrode 542 is provided on the first touch layer 52, the touch electrode 542 is connected to the first touch trace 521. Similarly, the connection portion 71 between the touch electrode 542 and the first touch trace 521 also has a start point 711 and an end point 712.

[0163] The via 531 may include a first via 5311, which is located on the side of the connection portion 71 away from the touch electrode 542. Specifically, the first via 5311 is located on the side of the starting point 711 away from the ending point 712; that is, the first via 5311 is located before the second touch trace 541 is connected to the touch electrode 542. When the touch electrode 542 is a touch driving electrode, the touch driving signal on the first touch trace 521 and the touch driving signal on the second touch trace 541 are merged at the first via 5311, so that the touch driving signals input to the touch electrode 542 are consistent. When the touch electrode 542 is a touch sensing electrode, the touch sensing signal output from the touch electrode 542 is simultaneously transmitted to the first touch trace 521 and the second touch trace 541, ensuring that the initial data of the touch sensing signal transmitted on the first touch trace 521 and the initial data of the touch sensing signal transmitted on the second touch trace 541 are consistent.

[0164] Furthermore, via 531 may also include a second via 5312, which is located on the side of end point 712 near start point 711. This makes the touch detection leads 62 connecting the touch electrode 542 near the edge of the non-display area NA all have a double-layer structure, increasing the thickness of the signal transmission channel and thus reducing resistance; and also ensuring that the touch driving signal is uniformly input to the touch electrode 542, or that the touch sensing signal generated by the touch electrode 542 can be output.

[0165] Furthermore, the orthographic projection of the second via 5312 on the substrate 1 at least partially overlaps with the orthographic projection of the end point 712 on the substrate 1. That is, at the end point 712 where the touch electrode 542 and the second touch trace 541 are connected, the second touch trace 541 is connected to the first touch trace 521 through the second via 5312. This is because, outside the end point 712 where the touch electrode 542 and the second touch trace 541 are connected, setting vias to connect the first touch trace 521 and the second touch trace 541 cannot serve the function of combining signals and transmitting them to the touch electrode 542. The end point 712 is the last point where the touch electrode 542 receives the signal. Therefore, the second via 5312 is set at the end point 712.

[0166] Furthermore, referring to Figure 9 and Figure 11As shown, via 531 may further include a third via 5313, which is located between the first via 5311 and the second via 5312. The third via 5313 can be one, two, or more. The third via 5313 connects the first touch trace 521 and the second touch trace 541 at multiple points, allowing the touch driving signals on the first touch trace 521 and the second touch trace 541 to converge at multiple points, further ensuring the consistency of the touch driving signals input to the touch electrode 542.

[0167] It should be noted that the starting point 711 is closer to the touch driver chip 12 than the ending point 712.

[0168] In this example implementation, refer to Figure 12 and Figure 13 As shown, Figure 12 The dashed lines in the diagram represent the portion obscured by the upper layer. The source / drain layer 272 may also include a connecting wire 273. The connecting wire 273 is located in the bending region BEND and extends to the surrounding region ZB and the bonding region BOD. The connecting wire 273 can be formed in the same layer and with the same material as the first source / drain layer 27. That is, the connecting wire 273 can be formed in the same patterning process as the source 271 and the drain 272. When a second source / drain layer 30 is provided, the connecting wire 273 can be formed in the same layer and with the same material as the second source / drain layer 30, meaning the connecting wire 273 can be formed in the same patterning process as the second source / drain layer 30.

[0169] A portion of the first touch trace 521 and / or the second touch trace 541 connected to the connecting wire 273 forms a connection portion 71, and the connecting wire 273 can be a functional structure 7.

[0170] A first transition hole 5317 is also provided on the touch insulating layer 53. The first transition hole 5317 is located in the peripheral area ZB and is positioned near the bending area BEND. That is, the first transition hole 5317 is located in a part of the peripheral area ZB near the bending area BEND. The second touch trace 541 is connected to the connecting wire 273 through the first transition hole 5317. Specifically, the fourth part 5412 is connected to the connecting wire 273 through the first transition hole 5317. This allows the touch signal to be transmitted through the connecting wire 273 in the bending area BEND without the need for the first touch trace 521 and the second touch trace 541. The source-drain layer 272 where the connecting wire 273 is located is in the neutral layer. During the bending process, the outer layer is stretched and the inner layer is compressed. On its cross-section, there will inevitably be a transition layer that is neither stretched nor compressed, and the stress is almost zero. This transition layer is called the neutral layer of the material. The length of the neutral layer remains unchanged during the bending process. Therefore, when the display panel is bent, the connecting wire 273 is neither stretched nor compressed, and the connecting wire 273 is not easy to break, thus ensuring the touch performance of the display panel.

[0171] Via 531 may also include a fourth via 5314, which is located in the peripheral area ZB and is set near the bending area BEND. That is, the fourth via 5314 is located in a part of the peripheral area ZB near the bending area BEND. The second touch trace 541 is connected to the first touch trace 521 through the fourth via 5314. Specifically, the second part 5212 is connected to the fourth part 5412 through the fourth via 5314.

[0172] A connecting portion 71 is formed at the first adapter hole 5317. The first adapter hole 5317 is located on the side of the fourth via hole 5314 near the bending area. This ensures that the fourth via hole 5314 is located on the side of the connecting portion 71 away from the functional structure 7 (connecting wire 273). The second touch trace 541 and the first touch trace 521 are connected through the fourth via hole 5314. At the fourth via hole, the touch sensing signals on the first touch trace 521 and the second touch trace 541 are merged, making the touch sensing drive signals input to the connecting wire 273 consistent. Furthermore, the touch drive signals output from the connecting wire 273 are simultaneously transmitted to the first touch trace 521 and the second touch trace 541, ensuring that the initial data of the touch drive signal transmitted on the first touch trace 521 and the initial data of the touch drive signal transmitted on the second touch trace 541 are consistent.

[0173] The width of the section 5412 opposite to the connecting wire 273 can be greater than the width of the remaining sections. The width of the first adapter hole 5317 can be set to be greater than the width of the fourth via hole 5314.

[0174] It should be noted that if other insulating layers are provided between the fourth part 5412 and the connecting wire 273, through holes need to be provided in these insulating layers so that the fourth part 5412 and the connecting wire 273 can be connected and conductive.

[0175] In this example embodiment, the first touch trace 521 may further include a fifth portion 5213, which is disposed in the bonding area BOD. The second touch trace 541 may further include a sixth portion 5413, which is also disposed in the bonding area BOD. The orthographic projection of the sixth portion 5413 on the substrate 1 at least partially overlaps with the orthographic projection of the fifth portion 5213 on the substrate 1. For example, the width of the sixth portion 5413 may be equal to the width of the fifth portion 5213. Since the sixth portion 5413 needs to be connected to the functional structure 7 of the display panel, the length of the sixth portion 5413 may be greater than the length of the fifth portion 5213, so that the orthographic projection of the sixth portion 5413 on the substrate 1 can cover the orthographic projection of the fifth portion 5213 on the substrate 1. Of course, due to errors in processes, equipment, etc., the sixth portion 5413 and the fifth portion 5213 may be misaligned to a certain extent in the width direction.

[0176] A second adapter hole 5318 is also provided on the touch insulating layer 53. The second adapter hole 5318 is located in the bonding area BOD and is positioned near the bending area BEND. That is, the second adapter hole 5318 is located in a part of the bonding area BOD near the bending area BEND. The sixth part 5413 is connected to the connecting wire 273 through the second adapter hole 5318. This allows touch signals to be transmitted in the bonding area BOD through the first touch trace 521 and the second touch trace 541, instead of through the connecting wire 273.

[0177] Via 531 may also include a fifth via 5315, which is located in the binding area BOD and near the bending area BEND, i.e., the fifth via 5315 is located in a part of the binding area BOD near the bending area BEND; the sixth part 5413 is connected to the fifth part 5213 through the fifth via 5315.

[0178] A connecting portion 71 is formed at the second adapter hole 5318. The second adapter hole 5318 is located on the side of the fifth via hole 5315 near the bending area BEND. This makes the fifth via hole 5315 located on the side of the connecting portion 71 away from the functional structure 7 (connecting wire 273). The second touch trace 541 (sixth part 5413) and the first touch trace 521 (fifth part 5213) are connected through the fifth via 5315. At the fifth via 5315, the touch driving signal on the first touch trace 521 (fifth part 5213) and the touch driving signal on the second touch trace 541 (fifth part 5413) are merged, so that the touch driving signal input to the connecting wire 273 is consistent. Moreover, the touch sensing signal output from the connecting wire 273 is simultaneously transmitted to the first touch trace 521 (fifth part 5213) and the second touch trace 541 (fifth part 5413), ensuring that the initial data of the touch driving signal transmitted on the first touch trace 521 (fifth part 5213) and the initial data of the touch driving signal transmitted on the second touch trace 541 (fifth part 5413) are consistent.

[0179] The width of the section 5413 opposite to the connecting wire 273 can be greater than the width of the remaining sections. The width of the second adapter hole 5318 can be set to be greater than the width of the fifth via hole 5315.

[0180] It should be noted that if other insulating layers are provided between the sixth part 5413 and the connecting wire 273, through holes need to be provided in these insulating layers so that the sixth part 5413 and the connecting wire 273 can be connected and conductive.

[0181] In this example implementation, refer to Figures 14-15 As shown, the sixth portion 5413 of the second touch trace 541 is connected to the bonding pin 75. The bonding pin 75 is a functional structure 7, that is, the bonding pin 75 can be a functional structure 7 of the display panel that is connected to the first touch trace 521 or the second touch trace 541 to form a connection portion 71.

[0182] The bonding pin 75 can be disposed in the same layer and with the same material as the first source-drain layer 27. That is, the bonding pin 75 can be formed in the same patterning process as the source 271 and the drain 272. When a second source-drain layer 30 is provided, the bonding pin 75 can be disposed in the same layer and with the same material as the second source-drain layer 30, that is, the bonding pin 75 can be formed in the same patterning process as the second source-drain layer 30.

[0183] A third adapter hole 5319 is also provided on the touch insulating layer 53. The third adapter hole 5319 is located in the bonding region BOD and is positioned away from the bending region BEND. That is, the third adapter hole 5319 is located in a part of the bonding region BOD away from the bending region BEND. The sixth part 5413 is connected to the bonding pin 75 through the third adapter hole 5319. Moreover, the orthographic projection of the sixth part 5413 on the substrate can cover the orthographic projection of the bonding pin 75 on the substrate.

[0184] Via 531 may also include a sixth via 5316, which is located in the bonding area BOD and is positioned near the bonding pin 75, i.e., the sixth via 5316 is located in a portion of the bonding area BOD near the bonding pin 75; the sixth portion 5413 is connected to the fifth portion 5213 through the sixth via 5316.

[0185] The connection point between the second touch trace 541 and the bonding pin 75 forms a connection portion 71, such that the sixth via 5316 is located on the side of the connection portion 71 away from the functional structure 7 (bonding pin 75). The second touch trace 541 (sixth part 5413) and the first touch trace 521 (fifth part 5213) are connected through the sixth via 5316. The touch sensing signals on the first touch trace 521 (fifth part 5213) and the second touch trace 541 (sixth part 5413) are merged at the eighth via, so that the touch sensing signals input to the bonding pin 75 are consistent. Moreover, the touch driving signal output from the bonding pin 75 is simultaneously transmitted to the first touch trace 521 (fifth part 5213) and the second touch trace 541 (sixth part 5413), ensuring that the initial data of the touch driving signal transmitted on the first touch trace 521 (fifth part 5213) and the initial data of the touch driving signal transmitted on the second touch trace 541 (sixth part 5413) are consistent.

[0186] The width of the section of the sixth part 5413 opposite to the bonding pin 75 can be greater than the width of the remaining sections of the sixth part 5413. The width of the third adapter hole 5319 can be set to be greater than the width of the sixth via 5316.

[0187] Of course, in some other exemplary embodiments of this disclosure, the fifth part 5213 may be connected to the bonding pin 75 and the connecting wire 273, or both the fifth part 5213 and the sixth part 5413 may be connected to the bonding pin 75 and the connecting wire 273.

[0188] In addition, the extension direction of the bonding pin 75 intersects with the extension direction of the sixth part 5413, which facilitates alignment.

[0189] Based on the same inventive concept, the present disclosure provides a display device that may include the display panel described in any of the above-mentioned embodiments. The specific structure of the display panel has been described in detail above, and therefore will not be repeated here.

[0190] The specific type of display device is not particularly limited; any type of display device commonly used in the field is acceptable, such as mobile devices like mobile phones, wearable devices like watches, VR devices, etc. Those skilled in the art can make the appropriate selection based on the specific purpose of the display device, which will not be elaborated further here.

[0191] It should be noted that, in addition to the display panel, the display device also includes other necessary components and parts. Taking the monitor as an example, these include, for instance, the casing, circuit board, power cord, etc. Those skilled in the art can supplement these components according to the specific usage requirements of the display device, and will not be elaborated here.

[0192] Compared with the prior art, the beneficial effects of the display device provided by the example embodiments of the present invention are the same as the beneficial effects of the display panel provided by the example embodiments described above, and will not be repeated here.

[0193] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A display panel, comprising a display area and a non-display area located on at least one side of the display area, wherein, The display panel includes: Substrate; A first touch layer is disposed on one side of the substrate, and the first touch layer includes a first touch trace, the first touch trace being at least partially located in the non-display area; A touch insulating layer is disposed on the side of the first touch layer opposite to the substrate, and at least one via is provided on the touch insulating layer, wherein the via is at least partially located in the non-display area; A second touch layer is disposed on the side of the touch insulating layer opposite to the substrate. The second touch layer includes a second touch trace. The resistance per unit length of the second touch trace is different from that of the first touch trace. The second touch trace is at least partially located in the non-display area. The orthographic projection of the second touch trace on the substrate overlaps at least partially with the orthographic projection of the first touch trace on the substrate. The second touch trace is connected to the first touch trace through the via. Wherein, a portion of the first touch trace and / or the second touch trace that is connected to at least one functional structure of the display panel forms a connection portion, and the at least one via is located at least on the side of the connection portion away from the functional structure; The non-display area includes a peripheral area, a bent area, and a bonding area. The peripheral area is closer to the display area, the bonding area is farther from the display area, and the bent area is located between the peripheral area and the bonding area. The display panel also includes: A display substrate is disposed between the substrate and the first touch layer. The display substrate includes a source-drain layer, and the source-drain layer includes connecting wires. The connecting wires are disposed in the bending region and extend to the peripheral region and the bonding region. The connecting wires are at least one functional structure.

2. The display panel according to claim 1, wherein, The at least one functional structure includes: A touch electrode is connected to the first touch trace and / or the second touch trace and is located in the display area. The connection portion of the touch electrode to the first touch trace and / or the second touch trace has a start point and an end point.

3. The display panel according to claim 2, wherein, The at least one via includes: The first via is located on the side of the starting point away from the ending point.

4. The display panel according to claim 3, wherein, The at least one via also includes: The second via is located on the side of the end point closer to the start point.

5. The display panel according to claim 4, wherein, The orthographic projection of the second via on the substrate and the orthographic projection of the end point on the substrate at least partially overlap.

6. The display panel according to claim 4, wherein, The at least one via also includes: At least one third via is located between the first via and the second via.

7. The display panel according to claim 6, wherein, The first touch trace includes: Part One; The second part is connected to the first part, and the width of the second part is smaller than the width of the first part; The second touch trace includes: The third part, wherein the orthographic projection of the third part on the substrate at least partially overlaps with the orthographic projection of the first part on the substrate; The fourth part is connected to the third part, and the orthographic projection of the fourth part on the substrate at least partially overlaps with the orthographic projection of the second part on the substrate, and the width of the fourth part is smaller than the width of the third part; The first part and / or the third part are connected to the touch electrode, and the third part is connected to the first part through the first via, the second via, and the third via.

8. The display panel according to claim 7, wherein, The first portion and / or the third portion are connected to the edge of the touch electrode near the non-display area, and multiple first portions and / or multiple third portions are located on the same line.

9. The display panel according to any one of claims 2-8, wherein, The touch electrode is a touch driving electrode or a touch sensing electrode, and the touch electrode is disposed on the second touch layer.

10. The display panel according to claim 1, wherein, The at least one via also includes: The fourth via is located in the surrounding area and is positioned close to the bending area. The second touch trace is connected to the first touch trace through the fourth via.

11. The display panel according to claim 10, wherein, The touch insulating layer is also provided with a first transition via, which is located in the peripheral area and close to the bending area. The second touch trace is connected to the connecting wire through the first transition via, which is located on the side of the fourth via close to the bending area.

12. The display panel according to claim 1, wherein, The first touch trace also includes: The fifth part is located in the binding area; The second touch trace also includes: The sixth part is located in the bonding area, and the orthographic projection of the sixth part on the substrate at least partially overlaps with the orthographic projection of the fifth part on the substrate. The touch insulating layer is also provided with a second adapter via, which is located in the bonding area and close to the bending area. The sixth part is connected to the connecting wire through the second adapter via.

13. The display panel according to claim 12, wherein, The at least one via also includes: The fifth via is located in the binding area and is disposed near the bending area. The sixth part is connected to the fifth part through the fifth via. The second transition via is located on the side of the fifth via that is close to the bending area.

14. The display panel according to claim 12, wherein, The display panel also includes: A bonding pin is located in the bonding area; The touch insulating layer is also provided with a third adapter via, which is connected to the bonding pin. The sixth part is connected to the connecting wire through the third adapter via, and the bonding pin is the at least one functional structure.

15. The display panel according to claim 14, wherein, The at least one via also includes: The sixth via is located in the bonding area and is positioned close to the bonding pin. The sixth part is connected to the fifth part through the sixth via. The sixth via is located on the side of the third transition via that is close to the bending area.

16. The display panel according to claim 14, wherein, The extension direction of the bonding pin intersects with the extension direction of the sixth part.

17. The display panel according to claim 1, wherein, The display substrate includes: An active layer is disposed on one side of the substrate. A gate insulating layer is disposed on the side of the active layer opposite to the substrate. A gate is disposed on the side of the gate insulating layer opposite to the substrate. An interlayer dielectric layer is disposed on the side of the gate opposite to the substrate. A first source-drain layer is disposed on the side of the interlayer dielectric layer away from the substrate. The first source-drain layer includes a source and a drain, and the source and the drain are electrically connected to the active layer. A planarization layer is disposed on the side of the first source / drain layer away from the substrate. A second source / drain layer is disposed on the side of the planarization layer opposite to the substrate. The second source / drain layer includes a connection structure and a connection wire. The connection structure and the connection wire are spaced apart. The connection structure is electrically connected to the source or the drain. A passivation layer is disposed on the side of the second source / drain layer away from the substrate.

18. The display panel according to claim 17, wherein, The display substrate further includes: A first electrode is disposed on the side of the passivation layer opposite to the substrate, and the first electrode is electrically connected to the connection structure. A pixel definition layer is disposed on the side of the first electrode away from the substrate, and an opening is provided on the pixel definition layer; The light-emitting layer group is disposed on the side of the pixel definition layer opposite to the substrate, and is at least partially located within the opening; The second electrode is disposed on the side of the light-emitting layer group away from the substrate. An encapsulation layer assembly is disposed on the side of the second electrode opposite to the substrate, and the first touch layer is disposed on the side of the encapsulation layer assembly opposite to the substrate.

19. A display device, wherein, Includes the display panel as described in any one of claims 1 to 18.

Images