Touch display panel and display device

Abstract

Provided in the present disclosure are a touch display panel and a display device. The touch display panel comprises: a display substrate, comprising an active area and a peripheral area surrounding the active area; and a touch structure located on a display side of the display substrate, wherein the touch structure comprises a plurality of touch electrodes, and the plurality of touch electrodes are divided into a plurality of touch units arranged in an array; the plurality of touch units comprise a plurality of intermediate touch units and a plurality of edge touch units; and the intermediate touch units are located in the active area, and the edge touch units comprise: a first part located in the active area, and a second part electrically connected to the first part and located in the peripheral area, the distribution density of the first part being less than that of the second part.

Description

Touch display panel and display device Technical Field

[0001] This disclosure relates to the field of display technology, and more particularly to touch display panels and display devices. Background Technology

[0002] With the diversification of online education and office spaces, and the widespread use of portable electronic products in business and education, people have higher demands for human-computer interaction solutions, especially for writing with display screens and styluses.

[0003] Summary of the Invention

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

[0005] The display substrate includes a display area and a peripheral area surrounding the display area;

[0006] A touch structure is located on the display side of a display substrate. The touch structure includes multiple touch electrodes. The multiple touch electrodes are divided into multiple touch units arranged in an array. The multiple touch units include multiple middle touch units and multiple edge touch units. The middle touch units are located in the display area. The edge touch units include a first part located in the display area and a second part electrically connected to the first part and located in the peripheral area. The distribution density of the first part is less than the distribution density of the second part.

[0007] In some embodiments, in the arrangement direction of the middle touch unit and the edge touch unit, the width of the middle touch unit is greater than or equal to the width of the edge touch unit;

[0008] Multiple touch units are arranged in an array along a first direction and a second direction; the first direction and the second direction intersect.

[0009] Multiple edge touch units surround multiple middle touch units;

[0010] The width of the touch unit in the first direction is a first width, and the width of the touch unit in the second direction is a second width;

[0011] The first width of the edge touch unit located on one side of the middle touch unit in the first direction is less than or equal to the first width of the middle touch unit;

[0012] The second width of the edge touch unit located on one side of the middle touch unit in the second direction is less than or equal to the second width of the middle touch unit.

[0013] In some embodiments, in the arrangement direction of the first part and the second part, the first part has a third width, and the second part located on one side of the first part has a fourth width, wherein the third width is equal to the fourth width.

[0014] In some embodiments, in the arrangement direction of the first part and the second part, the first part has a third width, and the second part located on one side of the first part has a fourth width, wherein the third width is greater than the fourth width.

[0015] In some embodiments, in the display area, the display substrate includes: a plurality of opening areas and non-opening areas between the opening areas; the display area includes a plurality of sub-pixel light-emitting areas, and the opening area corresponds to at least one sub-pixel light-emitting area;

[0016] The touch unit includes multiple intersecting traces; in the display area, the orthographic projection of the traces onto the display substrate falls within the non-opening area and does not overlap with the opening area.

[0017] The distribution density of multiple wiring sections in the first part is the first density, and the distribution density of multiple wiring sections in the second part is the second density;

[0018] The first density is less than the second density.

[0019] In some embodiments, the ratio of the second density to the first density is greater than or equal to 2.

[0020] In some embodiments, the multiple traces of the touch unit include: multiple main traces; the multiple main traces interweave to form a first mesh structure having multiple first openings;

[0021] The edge touch unit also includes multiple routing sections: multiple encrypted routing sections; the multiple encrypted routing sections interweave to form a second mesh structure with multiple second openings;

[0022] The second opening is smaller than the first opening; at least a portion of the second opening of the second mesh structure falls within the orthographic projection of the first opening on the display substrate.

[0023] The second mesh structure is electrically connected to the main wiring section.

[0024] In some embodiments, the orthographic projection of the second mesh structure onto the display substrate does not overlap with the display area.

[0025] In some embodiments, the line width of the main routing section is equal to the line width of the encrypted routing section.

[0026] In some embodiments, the touch structure includes: a plurality of first touch electrodes and a plurality of second touch electrodes disposed intersecting with the plurality of first touch electrodes; the plurality of first touch electrodes and the plurality of second touch electrodes are divided into a plurality of touch units;

[0027] In the edge touch unit, the second mesh structure of the first touch electrode and the second mesh structure of the second touch electrode do not overlap in their orthographic projections onto the display substrate.

[0028] In some embodiments, the main trace portion of the first touch electrode is a first main trace portion, and the main trace portion of the second touch electrode is a second main trace portion.

[0029] Multiple first main wiring sections intertwine to form a third grid structure with multiple third openings, and multiple second main wiring sections intertwine to form a fourth grid structure with multiple fourth openings;

[0030] The projection of the intersecting second main trace onto the display substrate divides the projection of the third opening onto the display substrate into multiple first openings;

[0031] The projection of the first main trace on the display substrate divides the projection of the fourth opening on the display substrate into multiple first openings.

[0032] In some embodiments, in the second portion located on one side of the display area in the extending direction of the first touch electrode, the second mesh structure closest to the display area is the second mesh structure of the first touch electrode.

[0033] In some embodiments, in the second portion located on one side of the display area in the extending direction of the first touch electrode, the area occupied by the trace portion of the second mesh structure of the first touch electrode is smaller than the area occupied by the trace portion of the second mesh structure of the second touch electrode.

[0034] In some embodiments, the size of the second opening in the second mesh structure of the first touch electrode is approximately the same as the size of the second opening in the second mesh structure of the second touch electrode;

[0035] In the second portion located on one side of the display area along the extension direction of the first touch electrode, the width of the second mesh structure of the first touch electrode in the first direction is smaller than the width of the second mesh structure of the second touch electrode in the first direction.

[0036] In some embodiments, in the second portion located on one side of the display area in the extending direction of the second touch electrode, the second mesh structure closest to the display area is the second mesh structure of the second touch electrode.

[0037] In some embodiments, in the second portion located on one side of the display area in the extending direction of the second touch electrode, the area occupied by the trace portion of the second mesh structure of the second touch electrode is smaller than the area occupied by the trace portion of the second mesh structure of the first touch electrode.

[0038] In some embodiments, the size of the second opening in the second mesh structure of the first touch electrode is approximately the same as the size of the second opening in the second mesh structure of the second touch electrode;

[0039] In the second portion located on one side of the display area along the extension direction of the second touch electrode, the width of the second mesh structure of the second touch electrode in the second direction is smaller than the width of the second mesh structure of the first touch electrode in the second direction.

[0040] In some embodiments, the second portion includes: a plurality of second mesh structures of the first touch electrode and a plurality of second mesh structures of the second touch electrode; at least in the arrangement direction of the first portion and the second portion, the plurality of second mesh structures of the first touch electrode and the plurality of second mesh structures of the second touch electrode are arranged alternately.

[0041] In some embodiments, in a group of touch units arranged along a first direction, some wiring portions are integrally connected to form a first through-wire extending along the first direction; the number of first through-wires included in the edge touch units is equal to the number of first through-wires included in the middle touch units; and / or,

[0042] In a group of touch units arranged along the second direction, some wiring portions are integrally connected to form a second through wiring extending along the second direction; the number of second through wirings included in the edge touch unit is equal to the number of second through wirings included in the middle touch unit.

[0043] This disclosure provides a display device, including a display panel provided in this disclosure. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 is a schematic diagram of the structure of a touch display panel provided in an embodiment of this disclosure;

[0046] Figure 2 is a schematic diagram of another touch display panel provided in an embodiment of this disclosure;

[0047] Figure 3 is a schematic diagram of the structure of another touch display panel provided in an embodiment of this disclosure;

[0048] Figure 4 is a structural schematic diagram of another touch display panel provided in an embodiment of this disclosure;

[0049] Figure 5 is a structural schematic diagram of another touch display panel provided in an embodiment of this disclosure;

[0050] Figure 6 is a schematic diagram of the structure of another touch display panel provided in an embodiment of this disclosure;

[0051] Figure 7 is a schematic diagram of the structure of another touch display panel provided in an embodiment of this disclosure;

[0052] Figure 8 is a structural schematic diagram of another touch display panel provided in an embodiment of this disclosure;

[0053] Figure 9 is a structural schematic diagram of another touch display panel provided in an embodiment of this disclosure;

[0054] Figure 10 is a structural schematic diagram of another touch display panel provided in an embodiment of this disclosure;

[0055] Figure 11 is a schematic diagram of the structure of another touch display panel provided in an embodiment of this disclosure;

[0056] Figure 12 is a schematic diagram of the structure of another touch display panel provided in an embodiment of this disclosure;

[0057] Figure 13 is a schematic diagram of the structure of another touch display panel provided in an embodiment of this disclosure. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Furthermore, the embodiments and features in the embodiments of this disclosure can be combined with each other without conflict. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0059] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0060] It should be noted that the dimensions and shapes of the figures in the accompanying drawings do not reflect actual proportions and are intended only to illustrate the content of this disclosure. Furthermore, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0061] In related technologies, capacitive active pens are typically used for writing and other operations on touch display products. However, the touch electrodes of touch display products are located in the display area, while there are no touch electrodes in the peripheral area outside the display area. When the capacitive active pen writes at the edge of the display area, the signal strength decreases, resulting in lower writing accuracy at the edge of the screen and affecting writing and drawing input.

[0062] This disclosure provides a touch display panel, as shown in Figures 1 and 2, the touch display panel includes:

[0063] The display substrate 1 includes a display area AA and a peripheral area NA surrounding the display area AA;

[0064] The touch structure 2 is located on the display side of the display substrate 1. The touch structure 2 includes multiple touch electrodes 3. The multiple touch electrodes 3 are divided into multiple touch units 4 arranged in an array. The multiple touch units 4 include multiple middle touch units 401 and multiple edge touch units 402. The middle touch units 401 are located in the display area AA. The edge touch units 402 include a first part 5 located in the display area AA and a second part 6 electrically connected to the first part 5 and located in the peripheral area NA. The distribution density of the first part 5 is less than the distribution density of the second part 6.

[0065] It should be noted that the embodiments disclosed herein can be used for capacitive active pens.

[0066] The touch display panel provided in this embodiment includes a touch structure comprising a central touch unit in the display area and an edge touch unit in the peripheral area. When a capacitive stylus is used to write on the touch display panel and moves to the edge of the display area, compared to related technologies where no touch units are provided in the peripheral area, the signal variation of the capacitive stylus can be increased. This avoids signal drop when writing at the edge of the display area, prevents large signal variations, improves writing accuracy at the edge of the screen, and enhances the user experience. Furthermore, since the peripheral area is typically small, the width of the second part is limited. The distribution density of the first part in the display area is less than that of the second part in the peripheral area, which balances the capacitance distribution between the display area and the peripheral area while avoiding excessive increase in the size of the peripheral area.

[0067] It should be noted that Figures 1 and 2 are only used to illustrate the arrangement of the touch electrodes 3, and the bar areas represent the touch electrodes 3, but do not represent the actual pattern of the touch electrodes.

[0068] In some embodiments, the display substrate is an electroluminescent display panel. As shown in FIG3, the display substrate 1 includes: a substrate 101, a driving circuit layer 109 located on one side of the substrate 101, a pixel definition layer 107 located on the side of the driving circuit layer 109 opposite to the substrate 101, a plurality of light-emitting devices 108, and an encapsulation layer 102 located on the side of the light-emitting devices 108 opposite to the substrate; wherein, the display substrate includes a plurality of sub-pixels (not shown) in the display area; the light-emitting devices 108 correspond one-to-one with the sub-pixels (not shown).

[0069] In some embodiments, the plurality of sub-pixels may include, for example, a plurality of red sub-pixels, a plurality of blue sub-pixels, and a plurality of green sub-pixels; correspondingly, the plurality of light-emitting devices may include a plurality of red light-emitting devices, a plurality of blue light-emitting devices, and a plurality of green light-emitting devices.

[0070] In some embodiments, as shown in FIG3, in the display area AA, the display substrate 1 includes: a plurality of opening areas 15 and non-opening areas 16 between the opening areas 15; the display area AA includes a plurality of sub-pixel light-emitting areas 17, and the opening area 15 corresponds to at least one sub-pixel light-emitting area 17. FIG3 illustrates an example of a one-to-one correspondence between the opening area 15 and the sub-pixel light-emitting area 17.

[0071] In some embodiments, as shown in FIG3, the light-emitting device 108 includes an anode 1081, a light-emitting functional layer 1082, and a cathode 1083 stacked together. The pixel definition layer 107 includes a plurality of opening regions 15. The pixel definition layer 107 covers the edge of the anode 1081. The orthographic projection of the sub-pixel opening region 15 onto the substrate 101 falls within the orthographic projection of the anode 1081 onto the substrate 101. The light-emitting functional layer 1082 is located on the side of the anode 1081 and the pixel definition layer 107 facing away from the substrate 101. The cathode 1083 is located on the side of the light-emitting functional layer 1082 facing away from the substrate 101. That is, the area corresponding to the pixel definition layer 107 is the non-opening region 16.

[0072] In specific implementation, if the light-emitting device is an organic light-emitting diode, the light-emitting functional layer shall at least include an organic light-emitting layer, and may also include at least one of the following: an electron injection layer, a hole blocking layer, an electron transport layer, a hole transport layer, an electron blocking layer, and a hole injection layer.

[0073] In some embodiments, as shown in FIG3, the driving circuit layer 109 includes a pixel driving circuit that corresponds one-to-one with the light-emitting device 108 and drives the light-emitting device 108 to emit light; the pixel driving circuit includes, for example, a thin-film transistor (TFT) and a capacitor (not shown). It should be noted that only one TFT is shown in FIG3. In specific implementations, the pixel driving circuit may also include a greater number of thin-film transistors, and the capacitor may include one or more capacitors.

[0074] It should be noted that Figure 3 uses a thin-film transistor (TFT) with a top-gate structure as an example, where the gate G is located on the side of the active layer 1091 facing away from the substrate 101. The display substrate 18 also includes: a second buffer layer 103 located between the substrate 101 and the active layer 1091; a gate insulating layer 104 located between the gate G and the active layer 1091; an interlayer insulating layer 105 between the gate G and the source S and drain D; and a planarization layer 106 located between the source S and drain D and the anode 1081.

[0075] In some embodiments, the anode is connected to the drain via a via that penetrates the planarization layer.

[0076] In some embodiments, as shown in FIG1, the touch structure 2 includes: a plurality of first touch electrodes 301, and a plurality of second touch electrodes 302 intersecting with the plurality of first touch electrodes 301; the plurality of first touch electrodes 301 and the plurality of second touch electrodes 302 are divided into a plurality of touch units 4. That is, a touch unit 4 includes both a portion of the first touch electrodes 301 and a portion of the second touch electrodes 302.

[0077] In some embodiments, as shown in FIG1, a plurality of first touch electrodes 301 extend along a first direction X and are arranged along a second direction Y;

[0078] Multiple second touch electrodes 302 extend along the second direction Y and are arranged along the first direction X.

[0079] In some embodiments, one of the first touch electrode and the second touch electrode is a touch driving electrode and the other is a touch sensing electrode. For example, the first touch electrode is a touch driving electrode and the second touch electrode is a touch sensing electrode.

[0080] In some embodiments, as shown in FIG1, the orthographic projections of the plurality of first touch electrodes 301 on the substrate 101 and the orthographic projections of the plurality of second touch electrodes 302 on the substrate 101 have overlapping areas.

[0081] In some embodiments, as shown in FIG3, the touch structure 2 includes a multilayer touch conductive layer 8;

[0082] The multilayer touch conductive layer 8 includes a first touch conductive layer 8-1 and a second touch conductive layer 8-2; the second touch conductive layer 8-2 is located on the side of the first touch conductive layer 8-1 that is away from the display substrate 1;

[0083] The touch structure 2 further includes: a first buffer layer 12 located between the first touch conductive layer 8-1 and the encapsulation layer 102, a touch insulating layer 13 located between the first touch conductive layer 8-1 and the second touch conductive layer 8-2, and a protective layer 14 located on the side of the second touch conductive layer 8-2 facing away from the substrate 1. That is, the first buffer layer 12 is disposed on the encapsulation layer 102.

[0084] The touch display panel provided in this embodiment adopts the FMLOC process, that is, the touch electrodes are directly fabricated on the stacked light-emitting structure layer and encapsulation layer, which can reduce the thickness of the touch display panel and help to achieve the thinning of touch display products.

[0085] In some embodiments, as shown in FIG4, the first touch electrode 301 and the second touch electrode 302 are located in different conductive touch layers 8. FIG4 illustrates an example where the second touch electrode 302 is located in the first conductive touch layer 8-1 and the first touch electrode 301 is located in the second conductive touch layer 8-2.

[0086] Alternatively, in some embodiments, as shown in FIG5, one of the first touch electrode 301 and the second touch electrode 302 is located in the same touch conductive layer 8, and the other touch electrode 301 includes portions located in different touch conductive layers 8.

[0087] In some embodiments, as shown in FIG5, the first touch electrode 301 is located in the same touch conductive layer 8, and the second touch electrode 302 includes a sub-part 3021 located in the same touch conductive layer 8 as the first touch electrode 301 and a bridging part 3022 located in a different touch conductive layer 8 from the first touch electrode 301; the bridging part 3022 is electrically connected to the sub-part 3021 through a through-hole penetrating the touch insulating layer 13.

[0088] The orthographic projection of the bridging portion 3022 on the substrate 101 overlaps with the orthographic projection of the first touch electrode 301 on the substrate 101, while the orthographic projection of the sub-portion 3021 on the substrate 101 does not overlap with the orthographic projection of the first touch electrode 301 on the substrate 101.

[0089] In some embodiments, as shown in FIG5, the first touch electrode 301 and the sub-part 3021 are located in the second touch conductive layer 8-2, and the bridging part 3022 is located in the first touch conductive layer 8-1.

[0090] In some embodiments, as shown in Figures 1 and 2, in the arrangement direction of the middle touch unit 401 and the edge touch unit 402, the width of the middle touch unit 401 is greater than or equal to the width of the edge touch unit 402.

[0091] In some embodiments, as shown in Figures 1 and 2, a plurality of touch units 4 are arranged in an array along a first direction X and a second direction Y; the first direction X and the second direction Y intersect.

[0092] Multiple edge touch units 402 surround multiple middle touch units 401.

[0093] As shown in Figures 1 and 2, multiple edge touch units 402 surround multiple intermediate touch units 401 and are arranged in a circle. The touch structure includes edge touch units 402 that are adjacent to the intermediate touch units 401 in the first direction X or the second direction Y, and also includes touch units 402 located on one side of a corner of the intermediate touch units 401 in the direction that intersects both the first direction X and the second direction Y.

[0094] In some embodiments, as shown in FIG1 and FIG2, the peripheral area NA includes: a first peripheral area NA-1 and a second peripheral area NA-2 located on both sides of the display area AA in the first direction X, and a third peripheral area NA-3 and a fourth peripheral area NA-4 located on both sides of the display area AA in the second direction Y.

[0095] Each peripheral area NA is equipped with an edge touch unit 402.

[0096] In some embodiments, the touch panel further includes multiple touch traces and multiple bonding pins, with the touch electrodes electrically connected to the bonding pins via the touch traces; for example, a third peripheral area may include a bonding area, with the bonding pins located in the bonding area.

[0097] In some embodiments, as shown in FIG1 and FIG2, the width of the touch unit 4 in the first direction X is a first width h1, and the width of the touch unit 4 in the second direction Y is a second width h2.

[0098] The first width h12 of the edge touch unit 402 located on one side of the middle touch unit 401 in the first direction X is less than or equal to the first width h11 of the middle touch unit 401.

[0099] The second width h22 of the edge touch unit 402 located on one side of the middle touch unit 401 in the second direction Y is less than or equal to the second width h21 of the middle touch unit 401.

[0100] It should be noted that, in Figures 1 and 2, the first width h12 of the edge touch unit 402 located on one side of the middle touch unit 401 in the first direction X is less than the first width h11 of the middle touch unit 401, and the second width h22 of the edge touch unit 402 located on one side of the middle touch unit 401 in the second direction Y is less than the second width h21 of the middle touch unit 401.

[0101] In some embodiments, as shown in FIG1, in the arrangement direction of the first part 5 and the second part 6, the first part 5 has a third width h3, and the second part 6 located on one side of the first part 5 has a fourth width h4, wherein the third width h3 is equal to the fourth width h4.

[0102] The touch panel provided in this embodiment has an edge touch unit in which the third width of the first part located in the display area is equal to the fourth width of the second part located in the peripheral area. By setting the edge touch unit to increase the signal change of the capacitive active pen at the edge of the display area, it is beneficial to balance the capacitance distribution of the touch electrodes in the peripheral area and the display area.

[0103] Alternatively, in some embodiments, as shown in FIG2, in the arrangement direction of the first part 5 and the second part 6, the first part 5 has a third width h3, and the second part 6 located on one side of the first part 5 has a fourth width h4, wherein the third width h3 is greater than the fourth width h4.

[0104] It should be noted that a smaller peripheral area results in a better user experience. Since the edge touch unit includes a portion located in the peripheral area, the size of the peripheral area is influenced by the size of the second portion within the edge touch unit. A smaller fourth width results in a smaller peripheral area. In this embodiment of the present disclosure, the touch panel provided in this embodiment has an edge touch unit where the third width of the first portion located in the display area is greater than the fourth width of the second portion located in the peripheral area. Compared to the case where the third width h3 equals the fourth width h4, this effectively reduces the size of the second portion. While setting the edge touch unit to increase the signal change of the capacitive active pen at the edge of the display area, it also helps to achieve a narrow bezel to improve the user experience.

[0105] In some embodiments, the third width h3 is greater than or equal to 0.3 mm and less than or equal to 2 mm; the fourth width h4 is greater than 0 and less than or equal to 1 mm.

[0106] In some embodiments, as shown in FIG7 and FIG8, the touch unit 4 includes a plurality of intersecting wiring portions 7;

[0107] In the display area AA, as shown in FIG3, the orthographic projection of the trace portion 7 on the display substrate 1 falls into the non-opening area 16 and does not overlap with the opening area 15.

[0108] It should be noted that Figure 7 is an enlarged schematic diagram of region B1 in Figure 2 in one embodiment. Figure 8 is an enlarged schematic diagram of region B2 in Figure 7 in one embodiment.

[0109] In some embodiments, the traces are made of a metallic material. For traces located on the same touch conductive layer, breaks can be provided to disconnect the traces from each other at the required locations. That is, the touch electrode is a metal mesh structure with breaks formed by multiple interwoven metal traces. For example, when the mesh of the first touch electrode and the mesh of the second touch electrode are located on the same layer, breaks are provided in the mesh pattern formed across the entire surface to isolate the mesh of the first touch electrode from the mesh of the second touch electrode, as well as to isolate the traces within the touch electrode.

[0110] In some embodiments, as shown in Figures 7 and 8, the multiple intersecting wiring portions 7 include: a first wiring portion 7-1 extending along a first direction X, and a second wiring portion 7-2 extending along a second direction Y. The shape enclosed by the intersecting wiring portions 7 and the fracture area is rectangular. Of course, in specific implementations, the wiring portions can also extend in other directions, and the shape enclosed by the wiring portions and the fracture area can be rhomboid, triangular, hexagonal, or a combination of multiple shapes. Figures 7 and 8 illustrate the distance using a straight line segment as an example; in specific implementations, the wiring portions can also be broken lines, curves, etc., and this disclosure does not limit the embodiments. The edges of the metal mesh structure formed by the interlacing wiring portions can also include an incomplete mesh pattern.

[0111] The touch electrode provided in this embodiment includes multiple traces that interweave to form a metal mesh structure. This metal mesh structure provides advantages such as low resistance, small thickness, and fast response speed, improving the sensitivity and accuracy of touch recognition. Furthermore, by setting breaks in the mesh pattern across the entire surface to isolate the meshes of different touch electrodes, the screen-off effect of the metal lines can be improved.

[0112] In some embodiments, as shown in Figures 7 and 8, the distribution density of the multiple traces 7 in the first part 5 is a first density, and the distribution density of the multiple traces 7 in the second part 6 is a second density.

[0113] The first density is less than the second density.

[0114] The touch display panel provided in this embodiment has a first density lower than a second density, which is equivalent to densifying the wiring portion of the second part of the edge touch electrode. Even if the width occupied by the second part located in the peripheral area is reduced, the capacitance distribution of the display area and the peripheral area can still be balanced by increasing the distribution density of the wiring portion of the second part. This improves the signal change of the capacitive stylus at the edge of the display area while setting the edge touch unit and achieving a narrow bezel. Furthermore, since the wiring portion of the second part is located in the peripheral area, increasing the distribution density of the wiring portion of the second part will not affect the sub-pixel opening of the display area.

[0115] It should be noted that the distribution density of the wiring section refers to the ratio of the area of ​​the wiring section to the area of ​​the touch unit. The area of ​​the touch unit is the first width multiplied by the second width.

[0116] In some embodiments, the distribution density of the multiple traces in the intermediate touch unit is a third density;

[0117] The second density is greater than the third density.

[0118] In some embodiments, the distribution density of multiple wiring sections 7 in at least a portion of the first part is equal to the third density.

[0119] In some embodiments, the third density and the first density are greater than or equal to 2% and less than or equal to 10%;

[0120] The second density is greater than or equal to 10% and less than or equal to 60%.

[0121] In some embodiments, the ratio of the second density to the first density is greater than or equal to 2.

[0122] The touch display panel provided in this embodiment has a second density ratio greater than or equal to 2 to the first density. While reducing the width occupied by the second part located in the peripheral area, it ensures the distribution density of the wiring portion of the second part to balance the capacitance distribution of the display area and the peripheral area. While setting the edge touch unit and realizing the narrow bezel, it increases the signal change of the capacitive active pen at the edge of the display area.

[0123] To further increase the wiring density in the surrounding area, in some embodiments, the ratio of the second density to the first density may be greater than or equal to 3.

[0124] In some embodiments, as shown in FIG6 and FIG7, the multiple wiring sections 7 of the touch unit 4 include: multiple main wiring sections 701; the multiple main wiring sections 701 are interwoven to form a first mesh structure 19 having multiple first openings 18;

[0125] The edge touch unit 402 also includes multiple routing sections 7: multiple encrypted routing sections 702; the multiple encrypted routing sections 702 interweave to form a second mesh structure 21 with multiple second openings 20;

[0126] The second opening 20 is smaller than the first opening 18; at least a portion of the second opening 20 of the second mesh structure 21 falls within the orthographic projection of the first opening 18 onto the orthographic projection of the display substrate 1.

[0127] The second mesh structure 21 is electrically connected to the main wiring section 701.

[0128] The touch display panel provided in this embodiment of the present disclosure achieves a higher density of the wiring by setting a second grid structure formed by the interweaving of the encrypted wiring at least in the first opening, thereby increasing the signal change of the capacitive active stylus at the edge of the display area.

[0129] It should be noted that the area enclosed by the orthographic projection of the wiring portion onto the display substrate and the ports between the wiring portions serves as the opening of the grid structure formed by the interlacing of the wiring portions. The edges of the first grid structure and the second grid structure may also include incomplete grid patterns.

[0130] It should be noted that, as shown in Figure 7, in the display area AA, at least part of the first opening 18 does not include the encrypted wiring part 702, and the area corresponding to this type of first opening 18 is an unencrypted area; in the peripheral area NA, the first opening 18 includes the encrypted wiring part 702, and the area corresponding to this type of first opening 18 is an encrypted area.

[0131] In some embodiments, the line width of the main trace is equal to the line width of the encrypted trace. This simplifies the design and fabrication of the traces while simultaneously encrypting the touch electrodes.

[0132] In some embodiments, as shown in FIG7, the size of the first opening 18 in the peripheral area NA is the same as the size of the first opening 18 in the display area AA. Typically, the space of the first opening of the grid formed by the interlacing of the main wiring portions is sufficient, and at least within the first opening, a dense wiring portion is set for encryption, which can avoid increasing the difficulty of wiring pattern design.

[0133] In some embodiments, as shown in FIG7, the width h5 of the first opening 18 in the first direction X and the width h6 of the first opening 18 in the second direction Y are greater than or equal to 50 micrometers and less than or equal to 1500 micrometers.

[0134] In some embodiments, as shown in FIG7, the width h7 of the second opening 20 in the first direction X and the width h8 of the second opening 20 in the second direction Y are greater than or equal to 15 micrometers and less than or equal to 500 micrometers.

[0135] In some embodiments, as shown in FIG7, the second mesh structure 21 overlaps with the display area AA in the orthographic projection of the display substrate 1.

[0136] Alternatively, in some embodiments, as shown in Figures 8 to 11, the orthographic projection of the second mesh structure 21 onto the display substrate 1 does not overlap with the display area AA.

[0137] The touch display panel provided in this embodiment of the present disclosure has a second grid structure formed by setting up a encrypted wiring portion. The projection of this grid structure onto the display substrate does not overlap with the display area. That is, the encrypted wiring portion is only located in the peripheral area, and the wiring portion in the peripheral area is encrypted only. This can avoid the encrypted wiring portion affecting the sub-pixel aperture ratio of the display area.

[0138] It should be noted that Figures 7, 8, and 10 illustrate the second part 6 located in the first peripheral region NA-1. For example, the pattern of the second peripheral region is similar to the pattern symmetrical along the second direction Y-axis in the above three figures, and will not be described again here. Figures 9 and 11 illustrate the second part 6 located in the fourth peripheral region NA-4. For example, the pattern of the third peripheral region is similar to the pattern symmetrical along the first direction X-axis in the above two figures, and will not be described again here.

[0139] In some embodiments, as shown in Figures 7 to 11, in the edge touch unit 402, the second mesh structure 21 of the first touch electrode 301 and the second mesh structure 21 of the second touch electrode 302 do not overlap in their orthographic projections onto the display substrate 1. This avoids interference between different touch electrodes.

[0140] In some embodiments, as shown in Figures 7 to 11, the encrypted wiring portion 702 of a portion of the first touch electrode 301 in the orthographic projection on the display substrate 1 overlaps with the main wiring portion 701 of the second touch electrode 302 in the orthographic projection on the display substrate 1, and the encrypted wiring portion 702 at the overlapping point intersects with the main wiring portion 701.

[0141] And / or, the encrypted wiring portion 702 of a portion of the second touch electrode 302 overlaps with the main wiring portion 701 of the first touch electrode 301 in the display substrate 1 in its orthogonal projection, and the encrypted wiring portion 702 at the overlap intersects with the main wiring portion 701.

[0142] In some embodiments, as shown in Figures 7 to 11, the main wiring portion 701 of the first touch electrode 301 is a first main wiring portion 7011, and the main wiring portion 701 of the second touch electrode 302 is a second main wiring portion 7012.

[0143] Multiple first main wiring sections 7011 interweave to form a third grid structure 23 with multiple third openings 22, and multiple second main wiring sections 7012 interweave to form a fourth grid structure 25 with multiple fourth openings 24.

[0144] The cross-shaped second main trace 7012, when projected onto the display substrate 1, divides the third opening 22 into multiple first openings 18.

[0145] The first main trace 7011, when projected onto the display substrate 1, divides the fourth opening 24 into multiple first openings 18.

[0146] It should be noted that if the first touch electrode and the second touch electrode include portions located in the same touch conductive layer, then the wiring portions of the first touch electrode and the second touch electrode have overlapping areas in their orthographic projections onto the display substrate, and their wiring portions are located in different layers. The first mesh structure is a mesh structure formed by superimposing multiple first main wiring portions and multiple second main wiring portions in the panel thickness direction. That is, it is a mesh structure formed by the orthographic projections of multiple first main wiring portions and multiple second main wiring portions onto the display substrate.

[0147] It should be noted that when the first touch electrode and the second touch electrode are located in different touch conductive layers, the first mesh structure is: a mesh structure formed by superimposing multiple first main traces and multiple second main traces in the thickness direction of the panel. That is, a mesh structure formed by the orthographic projection of multiple first main traces and multiple second main traces onto the display substrate.

[0148] In some embodiments, as shown in Figures 7 to 9, the distance h9 between the trace portions 7 located on different types of touch electrodes 3 in the first direction X and the distance h10 between the trace portions 7 located on different types of touch electrodes 3 in the second direction Y are greater than or equal to 3 micrometers and less than or equal to 100 micrometers.

[0149] It should be noted that the distribution density of the touch electrodes can be further increased by reducing h9 and / or h10. For example, in Figure 7, the left side of the second mesh structure 21 closest to the first touch electrode 301 in the display area AA is closer to the main trace 701 of the second touch electrode 302. In Figure 9, the length of the encrypted trace 702 extending along the first direction X of the second touch electrode 302 is increased, making the left side of the second mesh structure 21 closest to the first touch electrode 301 in the display area AA even closer to the encrypted trace 702. Therefore, h9 in Figure 9 is smaller than h9 in Figure 7, and the second density in Figure 9 is greater than the second density in Figure 7. Thus, compared with Figure 7, the arrangement of the traces shown in Figure 9 can further improve the signal variation of the capacitive stylus at the edge of the display area.

[0150] In some embodiments, as shown in FIG8, in the second portion 6 located on the side of the display area AA in the extending direction of the first touch electrode 301 (i.e., in the first direction X in the figure), the second mesh structure 21 closest to the display area AA is the second mesh structure 21 of the second touch electrode 302.

[0151] Alternatively, in some embodiments, as shown in Figures 7 and 10, in the second part 6 located on the side of the display area AA in the extending direction of the first touch electrode 301 (i.e., in the first direction X in the figure), the second mesh structure 21 closest to the display area AA is the second mesh structure 21 of the first touch electrode 301.

[0152] It should be noted that the first touch electrode extends along the first direction, and the second touch electrode extends along the second direction. Typically, the first touch electrode is used to position the capacitive stylus in the second direction, and the second touch electrode is used to position it in the first direction. When the capacitive stylus moves to the left or right edges of the display area, positioning it in the first direction using the second touch electrode is more prone to error.

[0153] In the touch display panel provided in this embodiment, in the second portion located on one side of the display area along the extension direction of the first touch electrode, the second mesh structure closest to the display area is the second mesh structure of the first touch electrode. The second mesh structure of the second touch electrode is located on the side of the second mesh structure of the first touch electrode that is furthest from the display area. Positioning the second mesh structure of the second touch electrode further away from the display area is more conducive to improving the sensing capacitance of the second touch electrode and enhancing the positioning accuracy of the capacitive active stylus in the first direction.

[0154] In some embodiments, as shown in FIG7 and FIG10, the trace portion 7 furthest from the display area AA in the extension direction of the first touch electrode 301 (i.e., in the first direction X in the figure) is the trace portion 7 of the first touch electrode 301.

[0155] It should be noted that the touch display panel also includes: multiple first leads and multiple second leads; the first leads are electrically connected to the first touch electrode, and the second leads are electrically connected to the second touch electrode. One connection method is that at least one end of the first lead is electrically connected to the first touch electrode in its extension direction. Therefore, the portion of the trace furthest from the display area in the extension direction of the first touch electrode is the trace portion of the first touch electrode, facilitating the electrical connection between the first touch electrode and the first lead.

[0156] In some embodiments, as shown in FIG10, in the second portion 6 located on the side of the display area AA in the extending direction of the first touch electrode 301, the area occupied by the wiring portion 7 of the second mesh structure 21 of the first touch electrode 301 is smaller than the area occupied by the wiring portion 7 of the second mesh structure 21 of the second touch electrode 302.

[0157] The touch display panel provided in this embodiment further increases the area occupied by the wiring portion of the second mesh structure of the second touch electrode, which can further improve the sensing capacitance of the second touch electrode and improve the positioning accuracy of the capacitive active pen in the first direction.

[0158] In some embodiments, as shown in FIG10, the size of the second opening 20 in the second mesh structure 21 of the first touch electrode 301 is approximately the same as the size of the second opening 20 in the second mesh structure 21 of the second touch electrode 302;

[0159] In the second part 6 located on one side of the display area AA in the extension direction of the first touch electrode 301, the width h11 of the second mesh structure 21 of the first touch electrode 301 in the first direction X is smaller than the width h12 of the second mesh structure 21 of the second touch electrode 302 in the first direction X.

[0160] The touch display panel provided in this embodiment increases the width of the second mesh structure of the second touch electrode in the first direction, which can further improve the sensing capacitance of the second touch electrode and improve the positioning accuracy of the capacitive active pen in the first direction.

[0161] Next, the capacitance between the capacitive active stylus and the first and second touch electrodes shown in Figures 7, 8, and 10 will be explained. It should be noted that in Figures 7, 8, and 10, the configuration and parameters of the middle touch unit 401 are the same, while the configuration and parameters of the edge touch unit 402 are not entirely the same. 'a' represents the edge touch unit 402 in Figure 7, 'b' represents the edge touch unit 402 in Figure 8, and 'c' represents the edge touch unit 402 in Figure 10. C1 represents the capacitance between the capacitive active stylus and the second touch electrode, and C2 represents the capacitance between the capacitive active stylus and the first touch electrode. As shown in Table 1, the capacitance between the second touch electrode 302 of the edge touch unit 402 in Figures 7 and 10 and the capacitive active stylus is greater than that in Figure 8. This is because the second grid structure of the second touch electrode is positioned further away from the display area, which is more conducive to improving the sensing capacitance of the second touch electrode. The capacitance between the second touch electrode 302 of the edge touch unit 402 in Figure 10 and the capacitive active pen is greater than that between the second touch electrode 302 of the edge touch unit 402 in Figure 7 and the capacitive active pen. This means that the distance h9 between the traces located on different types of touch electrodes in the first direction X is reduced, and the area and width of the traces of the second touch electrode are increased, which is more conducive to improving the sensing capacitance of the second touch electrode.

[0162] Table 1

[0163] In some embodiments, as shown in FIG9, in the second portion 6 located on the side of the display area AA in the extending direction of the second touch electrode 302, the second mesh structure 21 closest to the display area AA is the second mesh structure 21 of the first touch electrode 301.

[0164] Alternatively, in some embodiments, as shown in FIG11, in the second portion 6 located on the side of the display area AA in the extending direction of the second touch electrode 302, the second mesh structure 21 closest to the display area AA is the second mesh structure 21 of the second touch electrode 302.

[0165] It should be noted that the first touch electrode extends along the first direction, and the second touch electrode extends along the second direction. Typically, the first touch electrode is used to position the capacitive stylus in the second direction, and the second touch electrode is used to position it in the first direction. When the capacitive stylus moves to the top or bottom edges of the display area, positioning it in the second direction using the first touch electrode is more prone to error.

[0166] In the touch display panel provided in this embodiment, in the second portion located on one side of the display area along the extension direction of the second touch electrode, the second mesh structure closest to the display area is the second mesh structure of the second touch electrode, and the second mesh structure of the first touch electrode is located on the side of the second mesh structure of the second touch electrode that is away from the display area. Positioning the second mesh structure of the first touch electrode further away from the display area is more conducive to improving the sensing capacitance of the first touch electrode and improving the positioning accuracy of the capacitive active stylus in the second direction.

[0167] In some embodiments, as shown in FIG11, the trace portion 7 furthest from the display area AA in the extending direction of the second touch electrode 302 (i.e., in the second direction Y in the figure) is the trace portion 7 of the second touch electrode 302.

[0168] It should be noted that one way to connect the second lead to the second touch electrode is that the second lead is electrically connected to at least one end of the second touch electrode in the extension direction of the second touch electrode. Therefore, the trace portion furthest from the display area in the extension direction of the second touch electrode is the trace portion of the second touch electrode, which facilitates the electrical connection between the second touch electrode and the second lead.

[0169] In some embodiments, as shown in FIG11, in the second portion 6 located on the side of the display area AA in the extending direction of the second touch electrode 302, the area occupied by the wiring portion 7 of the second mesh structure 21 of the second touch electrode 302 is smaller than the area occupied by the wiring portion 7 of the second mesh structure 21 of the first touch electrode 301.

[0170] The touch display panel provided in this embodiment further increases the area occupied by the wiring portion of the second mesh structure of the first touch electrode, which can further improve the sensing capacitance of the first touch electrode and improve the positioning accuracy of the capacitive active pen in the second direction.

[0171] In some embodiments, as shown in FIG11, the size of the second opening 20 in the second mesh structure 21 of the first touch electrode 301 is approximately the same as the size of the second opening 20 in the second mesh structure 21 of the second touch electrode 302.

[0172] In the second portion 6 located on one side of the display area AA in the extending direction of the second touch electrode 302, the width h13 of the second mesh structure 21 of the second touch electrode 302 in the second direction Y is smaller than the width h14 of the second mesh structure 21 of the first touch electrode 301 in the second direction Y.

[0173] The touch display panel provided in this embodiment increases the width of the second mesh structure of the first touch electrode in the second direction, which can further improve the sensing capacitance of the first touch electrode and improve the positioning accuracy of the capacitive active pen in the second direction.

[0174] Next, the capacitance between the capacitive active stylus and the first and second touch electrodes shown in Figures 9 and 12 will be explained. It should be noted that in Figures 9 and 11, the configuration and parameters of the middle touch unit 401 are the same, while the configuration and parameters of the edge touch unit 402 are not entirely the same. d represents the edge touch unit 402 in Figure 9, and e represents the edge touch unit 402 in Figure 11. C1 represents the capacitance between the capacitive active stylus and the second touch electrode, and C2 represents the capacitance between the capacitive active stylus and the first touch electrode. As shown in Table 2, the capacitance between the first touch electrode 301 of the edge touch unit 402 in Figure 11 and the capacitive active stylus is greater than that in Figure 9. This is because the second mesh structure of the first touch electrode is positioned further away from the display area, which is more conducive to improving the sensing capacitance of the first touch electrode. Furthermore, the capacitance between the first touch electrode 301 of the edge touch unit 402 in Figure 11 and the capacitive active pen is greater than the capacitance between the first touch electrode 301 of the edge touch unit 402 in Figure 9 and the capacitive active pen. This increases the area and width of the wiring portion of the first touch electrode, which is more conducive to improving the sensing capacitance of the first touch electrode.

[0175] Table 2

[0176] In some embodiments, as shown in FIG11, in a group of touch units 4 arranged along the first direction X, a portion of the wiring portion 7 is integrally connected to form a first through-wire 26 extending along the first direction X; the number of first through-wires 26 included in the edge touch unit 402 is equal to the number of first through-wires 26 included in the middle touch unit 401; and / or,

[0177] As shown in Figure 10, in a group of touch units 4 arranged along the second direction Y, some wiring portions 7 are integrally connected to form a second through wiring 27 extending along the second direction Y; the number of second through wiring 27 included in the edge touch unit 402 is equal to the number of second through wiring 27 included in the middle touch unit 401.

[0178] In some embodiments, as shown in FIG11, for a group of edge touch units 402 arranged along the first direction X, a portion of the encrypted wiring portion 702 is integrally connected to form a first through wiring 26 extending along the first direction X, and a portion of the main wiring portion 701 is integrally connected to form a first through wiring 26 extending along the first direction X.

[0179] As shown in Figure 10, among a group of edge touch units 402 arranged along the second direction Y, some of the encrypted wiring parts 702 are integrally connected to form a second through wiring 27 extending along the second direction Y, and some of the main wiring parts 701 are integrally connected to form a second through wiring 27 extending along the second direction Y.

[0180] It should be noted that when the size of the edge touch unit is smaller than that of the middle touch unit, if the wiring density of the two is similar, the number of first or second through-wires in the edge touch unit will inevitably be less than the number of first or second through-wires in the middle touch unit. This will cause a resistance difference, and consequently, the capacitance of the capacitive stylus will differ when passing through the edge touch unit and the middle touch unit respectively. However, the touch display panel provided in this embodiment increases the wiring density by providing denser wiring sections in the peripheral area. Some of these denser wiring sections can also be integrally connected to form through-wire sections, thus increasing the number of first or second through-wires. This makes the number of first through-wires in the edge touch unit equal to the number of first through-wires in the middle touch unit, and / or, the number of second through-wires in the edge touch unit equal to the number of second through-wires in the middle touch unit. This helps to balance the resistance between the edge touch unit and the middle touch unit, thereby reducing the capacitance difference when the capacitive stylus passes through the edge touch unit and the middle touch unit respectively, and improving touch recognition accuracy.

[0181] In some embodiments, as shown in Figures 8, 9, and 11, a second mesh structure 21 of the first touch electrode 301 and a second mesh structure 21 of the second touch electrode 302 are alternately arranged in the arrangement direction of the first part 5 and the second part 6.

[0182] Specifically, in the third and fourth peripheral areas, the second part includes a row (a group arranged along the first direction X) of second grid structures for the first touch electrodes and a row of second grid structures for the second touch electrodes 302; the second part of the first and second peripheral areas includes a column (a group arranged along the second direction Y) of second grid structures for the first touch electrodes and a column of second grid structures for the second touch electrodes 302. Thus, within the limited size of the peripheral areas, both the first and second touch electrodes are densified, improving the signal strength between each touch electrode and the capacitive active pen.

[0183] Alternatively, in some embodiments, as shown in Figures 12 and 13, the second part 6 includes: a plurality of second mesh structures 21 of the first touch electrode 301 and a plurality of second mesh structures 21 of the second touch electrode 302; at least in the arrangement direction of the first part 5 and the second part 6, the plurality of second mesh structures 21 of the first touch electrode 301 and the plurality of second mesh structures 21 of the second touch electrode 302 are arranged alternately.

[0184] Specifically, in the third and fourth peripheral areas, the second part includes a second grid structure of multiple rows (arranged in groups along the first direction X) of first touch electrodes and a second grid structure of multiple rows of second touch electrodes 302; the second part of the first and second peripheral areas includes a second grid structure of multiple columns (arranged in groups along the second direction Y) of first touch electrodes and a second grid structure of multiple columns of second touch electrodes 302. Thus, with sufficient wiring space in the peripheral areas, the distribution density of the wiring sections of each type of touch electrode can be further increased, improving the signal between each type of touch electrode and the capacitive active pen.

[0185] It should be noted that Figure 12 illustrates the second part 6 located in the first peripheral region NA-1. For example, the pattern of the second peripheral region is similar to the pattern symmetrical along the second direction Y-axis in Figure 12, and will not be described again here. Figure 13 illustrates the second part 6 located in the fourth peripheral region NA-4. For example, the pattern of the third peripheral region is similar to the pattern symmetrical along the first direction X-axis in Figure 13, and will not be described again here.

[0186] Based on the same inventive concept, this disclosure also provides a display device, including the display panel provided in this disclosure.

[0187] The display device provided in this disclosure includes any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator. Other essential components of this display device are understood by those skilled in the art and will not be described in detail here, nor should they be construed as limiting this disclosure. Implementation of this display device can refer to the embodiments of the display panel described above; repeated details will not be repeated.

[0188] In summary, the touch display panel and display device provided in this disclosure include, in addition to the central touch unit located in the display area, an edge touch unit located in the peripheral area. When a capacitive stylus is used to write on the touch display panel and moves to the edge of the display area, compared to related technologies where no touch unit is provided in the peripheral area, the signal variation of the capacitive stylus can be increased. This avoids signal drop when the capacitive stylus is writing at the edge of the display area, prevents large signal variations, improves writing accuracy at the edge of the screen, and enhances the user experience. Furthermore, since the size of the peripheral area is usually small, the width of the second part is limited. The distribution density of the first part in the display area is less than that of the second part in the peripheral area, which can balance the capacitance distribution of the display area and the peripheral area while avoiding excessive increase in the size of the peripheral area.

[0189] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0190] Obviously, those skilled in the art can make various modifications and variations to this disclosure without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims of this disclosure and their equivalents, this disclosure is also intended to include such modifications and variations.

Claims

1. A touch display panel, wherein, The touch display panel includes: A display substrate includes a display area and a peripheral area surrounding the display area; A touch structure is located on the display side of the display substrate; the touch structure includes: a plurality of touch electrodes; the plurality of touch electrodes are divided into a plurality of touch units arranged in an array, the plurality of touch units including: a plurality of middle touch units and a plurality of edge touch units; the middle touch units are located in the display area, the edge touch units include: a first part located in the display area, and a second part electrically connected to the first part and located in the peripheral area; the distribution density of the first part is less than the distribution density of the second part.

2. The touch display panel according to claim 1, wherein, In the arrangement direction of the middle touch unit and the edge touch unit, the width of the middle touch unit is greater than or equal to the width of the edge touch unit; The plurality of touch units are arranged in an array along a first direction and a second direction; the first direction and the second direction intersect. The plurality of edge touch units surround the plurality of middle touch units; The width of the touch unit in the first direction is a first width, and the width of the touch unit in the second direction is a second width; The first width of the edge touch unit located on one side of the middle touch unit in the first direction is less than or equal to the first width of the middle touch unit; The second width of the edge touch unit located on one side of the middle touch unit in the second direction is less than or equal to the second width of the middle touch unit.

3. The touch display panel according to claim 1 or 2, wherein, In the arrangement direction of the first part and the second part, the first part has a third width, and the second part located on one side of the first part has a fourth width, wherein the third width is equal to the fourth width.

4. The touch display panel according to claim 1 or 2, wherein, In the arrangement direction of the first part and the second part, the first part has a third width, and the second part located on one side of the first part has a fourth width, wherein the third width is greater than the fourth width.

5. The touch display panel according to claim 3 or 4, wherein, In the display area, the display substrate includes: a plurality of opening areas and non-opening areas between the opening areas; the display area includes a plurality of sub-pixel light-emitting areas, and the opening area corresponds to at least one of the sub-pixel light-emitting areas; The touch unit includes multiple intersecting traces; in the display area, the orthographic projection of the traces onto the display substrate falls within the non-opening area and does not overlap with the opening area. The distribution density of the multiple traces in the first part is a first density, and the distribution density of the multiple traces in the second part is a second density; The first density is less than the second density.

6. The touch display panel according to claim 5, wherein, The ratio of the second density to the first density is greater than or equal to 2.

7. The touch display panel according to claim 5 or 6, wherein, The multiple wiring sections of the touch unit include: multiple main wiring sections; the multiple main wiring sections are interwoven to form a first grid structure with multiple first openings; The edge touch unit further includes multiple routing sections: multiple encrypted routing sections; the multiple encrypted routing sections interweave to form a second mesh structure with multiple second openings; The second opening is smaller than the first opening; at least a portion of the second opening in the second mesh structure falls within the orthographic projection of the first opening in the orthographic projection of the first opening in the display substrate. The second mesh structure is electrically connected to the main wiring section.

8. The touch display panel according to claim 7, wherein, The second grid structure does not overlap with the display area when projected onto the display substrate.

9. The touch display panel according to claim 7 or 8, wherein, The line width of the main routing section is equal to the line width of the encrypted routing section.

10. The touch display panel according to any one of claims 7 to 9, wherein, The touch structure includes: a plurality of first touch electrodes, and a plurality of second touch electrodes intersecting with the plurality of first touch electrodes; the plurality of first touch electrodes and the plurality of second touch electrodes are divided into a plurality of touch units; In the edge touch unit, the second mesh structure of the first touch electrode and the second mesh structure of the second touch electrode do not overlap in their orthographic projections on the display substrate.

11. The touch display panel according to claim 10, wherein, The main trace portion included in the first touch electrode is a first main trace portion, and the main trace portion included in the second touch electrode is a second main trace portion; The multiple first main wiring sections interweave to form a third grid structure with multiple third openings, and the multiple second main wiring sections interweave to form a fourth grid structure with multiple fourth openings. The intersecting second main trace portion, when projected onto the display substrate, divides the third opening into multiple first openings when projected onto the display substrate. The intersecting first main trace portion, when projected onto the display substrate, divides the fourth opening into multiple first openings when projected onto the display substrate.

12. The touch display panel according to claim 10 or 11, wherein, In the second portion located on one side of the display area in the extending direction of the first touch electrode, the second mesh structure closest to the display area is the second mesh structure of the first touch electrode.

13. The touch display panel according to claim 12, wherein, In the second portion located on one side of the display area in the extending direction of the first touch electrode, the area occupied by the trace portion of the second mesh structure of the first touch electrode is smaller than the area occupied by the trace portion of the second mesh structure of the second touch electrode.

14. The touch display panel according to claim 13, wherein, The size of the second opening in the second mesh structure of the first touch electrode is approximately the same as the size of the second opening in the second mesh structure of the second touch electrode; In the second portion located on one side of the display area along the extension direction of the first touch electrode, the width of the second mesh structure of the first touch electrode in the first direction is smaller than the width of the second mesh structure of the second touch electrode in the first direction.

15. The touch display panel according to any one of claims 10 to 14, wherein, In the second portion located on one side of the display area in the extending direction of the second touch electrode, the second mesh structure closest to the display area is the second mesh structure of the second touch electrode.

16. The touch display panel according to claim 15, wherein, In the second portion located on one side of the display area in the extending direction of the second touch electrode, the area occupied by the trace portion of the second mesh structure of the second touch electrode is smaller than the area occupied by the trace portion of the second mesh structure of the first touch electrode.

17. The touch display panel according to claim 16, wherein, The size of the second opening in the second mesh structure of the first touch electrode is approximately the same as the size of the second opening in the second mesh structure of the second touch electrode; In the second portion located on one side of the display area along the extension direction of the second touch electrode, the width of the second mesh structure of the second touch electrode in the second direction is smaller than the width of the second mesh structure of the first touch electrode in the second direction.

18. The touch display panel according to any one of claims 10 to 17, wherein, The second part includes: a plurality of second mesh structures of the first touch electrode and a plurality of second mesh structures of the second touch electrode; at least in the arrangement direction of the first part and the second part, the plurality of second mesh structures of the first touch electrode and the plurality of second mesh structures of the second touch electrode are arranged alternately.

19. The touch display panel according to any one of claims 7 to 18, wherein, In a group of touch units arranged along a first direction, a portion of the wiring portions are integrally connected to form a first through-wire extending along the first direction; the number of first through-wires included in the edge touch unit is equal to the number of first through-wires included in the middle touch unit; and / or, In a group of touch units arranged along the second direction, some of the wiring portions are integrally connected to form a second through wiring extending along the second direction; the number of second through wirings included in the edge touch unit is equal to the number of second through wirings included in the middle touch unit.

20. A display device, wherein, Includes the display panel according to any one of claims 1 to 19.

Images