Touch panel, touch display panel and touch display device

Abstract

A touch panel, a touch display panel and a touch display device, wherein the touch panel comprises: a plurality of first touch structures extending along a first direction and a plurality of second touch structures extending along a second direction, the first touch structure comprises: a plurality of first touch electrodes and a plurality of first connecting parts, and the second touch structure comprises: a plurality of second touch electrodes and a plurality of second connecting parts; the first touch electrode and the second touch electrode are arranged in the same layer, and the first connecting part or the second connecting part is arranged in the same layer with the first touch electrode; the touch panel further comprises: at least one touch branch located at the edge of the touch electrode, the extension direction of each touch branch intersects with the extension direction of the edge of the touch electrode where the touch branch is located, the extension direction of the touch branch is different from the first direction and the second direction, the touch electrode comprises: the first touch electrode and / or the second touch electrode; the length of the touch branch is greater than the length of the connecting part arranged in the same layer with the first touch electrode along a third direction.

Description

[0001] This application is a divisional application of the application filed on September 9, 2021, with application number 202180002489.4 and invention title "Touch Panel, Touch Display Panel and Touch Display Device". Technical Field

[0002] This disclosure relates to, but is not limited to, the field of touch technology, specifically to a touch panel, a touch display panel, and a touch display device. Background Technology

[0003] Organic light-emitting diodes (OLEDs) are active light-emitting display devices with advantages such as self-illumination, wide viewing angle, high contrast, low power consumption, and extremely high response speed. With the continuous development of display technology, flexible display devices that use OLEDs as light-emitting devices and thin film transistors (TFTs) for signal control have become the mainstream products in the display field.

[0004] Due to the demands for flexible, foldable, and narrow-bezel products, touch-enabled OLED displays incorporate touch panels. These touch panels utilize a Flexible Multi Layer On Cell (FMLOC) structure, mounted on the encapsulation layer of the OLED backplane, offering advantages such as thinness and foldability. To reduce resistance and improve sensitivity, the driving electrodes (Tx) and sensing electrodes (Rx) in the touch panel are constructed using a metal mesh. Compared to using transparent conductive materials (such as Indium Tin Oxide, ITO) for touch electrodes, the metal mesh offers advantages such as lower resistance, thinner profile, and faster response time. Summary of the Invention

[0005] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0006] In a first aspect, this disclosure provides a touch panel, comprising: a plurality of first touch structures extending along a first direction and a plurality of second touch structures extending along a second direction, wherein the plurality of first touch structures are arranged along the second direction and the plurality of second touch structures are arranged along the first direction; the first touch structure comprises: a plurality of first touch electrodes and a plurality of first connecting portions, and the second touch structure comprises: a plurality of second touch electrodes and a plurality of second connecting portions, wherein the first direction and the second direction intersect; the first touch electrodes and the second touch electrodes are disposed in the same layer, and the first connecting portion or the second connecting portion is disposed in the same layer as the first touch electrode; The touch panel further includes: at least one touch branch located at the edge of the touch electrode, the extension direction of each touch branch intersects the extension direction of the edge of the touch electrode where the touch branch is located, the extension direction of the touch branch is different from the first direction and the second direction, and the touch electrode includes: the first touch electrode and / or the second touch electrode; The length of the touch branch is greater than the length of the connecting portion disposed in the same layer as the first touch electrode along a third direction. The third direction is the same as the extension direction of a portion of the touch branch and intersects with the first direction and the second direction. The first touch electrode, the second touch electrode, the first connecting portion, the second connecting portion, and the touch branch all include: multiple grid patterns; wherein, the grid pattern is a polygon composed of metal wires; The first touch electrode is a planar electrode; or, The first touch electrode includes: a plurality of first electrodes extending along a fourth direction and a plurality of second electrodes extending along a fifth direction; both the first electrode and the second electrode include: a plurality of grid patterns, and a plurality of virtual regions are defined between the plurality of first electrodes and the plurality of second electrodes; The fourth direction and the fifth direction intersect, and both the fourth direction and the fifth direction are different from the first direction and the second direction.

[0007] In some possible implementations, the touch branch includes: a branch body and at least one protrusion located at the edge of the branch body; When the number of touch branches is at least two, the at least two touch branches are spaced apart from each other, and the at least two touch branches are located on both sides of the touch electrode.

[0008] In some possible implementations, the length of the branch body is greater than half the length of the touch electrode where the touch branch is located along the extension direction of the touch branch.

[0009] In some possible implementations, the branch body includes: a first side and a second side disposed opposite to each other, and a third side and a fourth side disposed opposite to each other; the third side is connected to the touch electrode where the touch branch is located; The at least one protrusion is located on the first side and the second side of the branch body.

[0010] In some possible implementations, the protrusions located on the first side of the branch body are staggered with the protrusions located on the second side of the branch body.

[0011] In some possible implementations, the width of the protrusion near the touch electrode where the touch branch is located is greater than the width of the protrusion away from the touch electrode where the touch branch is located.

[0012] In some possible implementations, when the touch electrode includes a first touch electrode and a second touch electrode, the touch branch on the first touch electrode is a first touch branch, and the first touch branch includes a first branch body and at least one first protrusion located at the edge of the first branch body; the touch branch on the second touch electrode is a second touch branch, and the second touch branch includes a second branch body and at least one second protrusion located at the edge of the second branch body. When the number of the first touch branch and the number of the second touch branch are both at least two, at least two first touch branches are spaced apart from each other, and at least two second touch branches are spaced apart from each other; at least one first touch branch is located between adjacent second touch branches, and at least one second touch branch is located between adjacent first touch branches; The maximum spacing between adjacent first touch branches is greater than the maximum width of the second touch branch; The maximum spacing between adjacent second touch branches is greater than the maximum width of the first touch branch.

[0013] In some possible implementations, a first groove is formed between adjacent first touch branches, and the second touch branch is engaged with the first groove; A second groove is formed between adjacent second touch branches, and the first touch branch and the second groove are interlocked.

[0014] In some possible implementations, the shape of the branch body includes: a rectangle; The shape of the protrusion includes: rectangle, triangle or wave.

[0015] In some possible implementations, the touch branch and the corresponding touch electrode are integrally formed.

[0016] Among some possible implementations are: a buffer layer, a bridging layer, an insulating layer, a touch layer, and a protective layer stacked in sequence; The touch layer includes: a plurality of first touch electrodes, a plurality of first connecting portions, and a plurality of second touch electrodes; the plurality of first touch electrodes and the plurality of first connecting portions are alternately arranged and connected sequentially, and the plurality of second touch electrodes are spaced apart; The bridging layer includes: a plurality of second connection portions, each second connection portion including: two first connection structures symmetrically arranged with respect to a first axis of symmetry, each first connection structure including: a first pad portion and a first connection bridge; the first pad portion is configured to be connected to an adjacent second touch electrode through a via on the insulating layer, the first connection bridge is configured to connect the first pad portion, and the first axis of symmetry extends along a second direction.

[0017] In some possible implementations, the first connecting bridge is a closed-loop structure consisting of multiple first connecting traces.

[0018] Among some possible implementations are: a buffer layer, a bridging layer, an insulating layer, a touch layer, and a protective layer stacked in sequence; The touch layer includes: a plurality of second touch electrodes, a plurality of second connecting portions, and a plurality of first touch electrodes; the plurality of second touch electrodes and the plurality of second connecting portions are alternately arranged and connected sequentially, and the plurality of first touch electrodes are spaced apart; The bridging layer includes: a plurality of first connection portions, each first connection portion including: two second connection structures symmetrically arranged with respect to a second axis of symmetry, each second connection structure including: a second pad portion and a second connection bridge; the second pad portion is configured to be connected to an adjacent first touch electrode through a via on the insulating layer, the second connection bridge is configured to connect the first pad portion, and the second axis of symmetry extends along a first direction.

[0019] In some possible implementations, the second connecting bridge is a closed-loop structure consisting of multiple second connecting traces.

[0020] In some possible implementations, each of the first connecting parts includes: a first sub-connecting part, a first sub-connecting structure, and a second sub-connecting part; The first sub-connection portion and the second sub-connection portion are respectively located on the touch branches of the two first touch electrodes connected by the first connection portion, and the first sub-connection structure is located between the first sub-connection portion and the second sub-connection portion; The lengths of the first sub-connection portion along the third direction and the lengths of the second sub-connection portion along the third direction are both less than half the length of the first touch branch.

[0021] In some possible implementations, each of the second connecting parts includes: a third sub-connecting part, a second sub-connecting structure, and a fourth sub-connecting part that are interconnected; The third sub-connection portion and the fourth sub-connection portion are respectively located on the touch branches of the two second touch electrodes connected by the second connection portion, and the second sub-connection structure is located between the third sub-connection portion and the fourth sub-connection portion; The length of the third sub-connecting portion along the third direction and the length of the fourth sub-connecting portion along the third direction are both less than half the length of the second touch branch.

[0022] In some possible implementations, when the first touch electrode includes: a plurality of first electrodes extending along the fourth direction and a plurality of second electrodes extending along the fifth direction, the width of the first boundary electrode is smaller than the width of the first non-boundary electrode, and the width of the second boundary electrode is smaller than the width of the second non-boundary electrode. Wherein, the first boundary electrode is a first electrode close to the second touch electrode, and the second non-boundary electrode is a first electrode located on the side of the first boundary electrode away from the second touch electrode; the second boundary electrode is a second electrode close to the second touch electrode, and the second non-boundary electrode is a second electrode located on the side of the second boundary electrode away from the second touch electrode.

[0023] In some possible implementations, the first electrode and the second electrode forming the virtual region are respectively provided with a first branch segment and a second branch segment; The first branch segment and the second branch segment located within the same virtual area are spaced apart from each other or connected to each other; The shapes of the first branch segment and the second branch segment include: cross-shaped or square.

[0024] In some possible implementations, both the first branch segment and the second branch segment include multiple grid patterns.

[0025] In some possible implementations, the second touch electrode is a planar electrode; or, The second touch electrode includes: a plurality of third electrodes extending along a fifth direction and a plurality of fourth electrodes extending along a fourth direction; each of the third electrodes and the fourth electrodes includes: a plurality of grid patterns, and a plurality of virtual regions are defined between the plurality of third electrodes and the plurality of fourth electrodes; The fourth direction and the fifth direction intersect, and both the fourth direction and the fifth direction are different from the first direction and the second direction.

[0026] In some possible implementations, when the second touch electrode includes: a plurality of third electrodes extending along the fifth direction and a plurality of fourth electrodes extending along the fourth direction, the width of the third boundary electrode is smaller than the width of the third non-boundary electrode, and the width of the fourth boundary electrode is smaller than the width of the fourth non-boundary electrode. Wherein, the third boundary electrode is a third electrode close to the first touch electrode, and the third non-boundary electrode is a third electrode located on the side of the third boundary electrode away from the first touch electrode; the fourth boundary electrode is a fourth electrode close to the first touch electrode, and the fourth non-boundary electrode is a fourth electrode located on the side of the fourth boundary electrode away from the first touch electrode.

[0027] In some possible implementations, the third and fourth electrodes forming the virtual region are respectively provided with a third branch segment and a fourth branch segment; The third branch segment and the fourth branch segment located within the same virtual area are spaced apart from each other or connected to each other; Both the third branch segment and the fourth branch segment include multiple grid patterns; The shapes of the third branch segment and the fourth branch segment include: cross-shaped or square.

[0028] In some possible implementations, a metal structure disposed in the same layer as the touch electrode is also included; The metal structure is located within the virtual area, and the metal structure includes multiple grid patterns.

[0029] Secondly, this disclosure also provides a touch display panel, including: a display panel and the aforementioned touch panel; The touch panel is located on the light-emitting side of the display panel or on the backlight side opposite to the light-emitting side; The display panel includes a substrate, which includes a light-emitting area and a non-light-emitting area. The light-emitting area includes a plurality of periodically arranged sub-pixels, and the non-light-emitting area includes sub-pixel edges located between adjacent sub-pixels. The touch panel includes a plurality of metal grids composed of metal lines. The region enclosed by the orthographic projection of the metal line onto the substrate includes the orthographic projection of at least one sub-pixel onto the substrate, and the orthographic projection of the sub-pixel edge onto the substrate includes the orthographic projection of the metal line onto the substrate.

[0030] Thirdly, this disclosure also provides a touch display device, including: the aforementioned touch display panel.

[0031] After reading and understanding the accompanying diagrams and detailed descriptions, the other aspects can be understood. Attached Figure Description

[0032] The accompanying drawings are used to provide an understanding of the technical solutions of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the technical solutions of this disclosure and do not constitute a limitation on the technical solutions of this disclosure.

[0033] Figure 1A This is a schematic diagram of the structure of a touch panel provided in an embodiment of this disclosure; Figure 1B for Figure 1A Cross-sectional view along the BB direction; Figure 1C for Figure 1A Cross-sectional view along the CC direction; Figure 2 This is an enlarged schematic diagram of region A in Figure 1; Figure 3 A schematic diagram of the structure of a first touch branch provided in an exemplary embodiment; Figure 4 A schematic diagram of the structure of the second touch branch provided in an exemplary embodiment; Figure 5A A schematic diagram of the structure of the second connection portion provided in an exemplary embodiment; Figure 5B A schematic diagram of the structure of the first connecting portion provided in an exemplary embodiment; Figure 6A A schematic diagram of the structure of the first connecting portion provided in an exemplary embodiment Figure 2 ; Figure 6B Schematic diagram of the structure of the second connection portion provided in an exemplary embodiment Figure 2 ; Figures 7-1 to 7-5 Here are schematic diagrams of the structures of several metal meshes; Figure 8 This is an enlarged view of region A in Figure 1. Figure 2 ; Figure 9 This is an enlarged view of region A in Figure 1. Figure 3 ; Figure 10 This is an enlarged view of region A in Figure 1. Figure 4 ; Figure 11 This is a magnified schematic diagram of region A in Figure 1 (Figure 5). Figure 12 A schematic diagram of the structure of a touch panel provided as an exemplary embodiment; Figure 13 This is a schematic diagram of the structure of a touch display panel provided in an embodiment of this disclosure; Figure 14 This is a schematic diagram of a planar structure of a display panel; Figures 15-1 to 15-3 Here are schematic diagrams of the structures of several pixel units; Figure 16 This is a schematic diagram of a cross-sectional structure of a display panel; Figure 17 A schematic diagram of the structure of a touch display panel provided for an exemplary embodiment. Detailed Implementation

[0034] In the accompanying drawings, the size of the constituent elements, the thickness of the layers, or the area are sometimes exaggerated for clarity. Therefore, one aspect of this disclosure is not necessarily limited to these dimensions, and the shapes and sizes of the components in the drawings do not reflect true proportions. Furthermore, the drawings schematically illustrate ideal examples, and one aspect of this disclosure is not limited to the shapes or values ​​shown in the drawings.

[0035] The ordinal numbers “first,” “second,” and “third” used in this specification are used to avoid confusion among the constituent elements, not to limit their quantity.

[0036] In this specification, for convenience, terms such as "middle," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships in conjunction with the accompanying drawings. This is solely for the purpose of facilitating the description and simplification, and does not imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this disclosure. The positional relationships of the constituent elements may be appropriately varied depending on the orientation of each constituent element being described. Therefore, the use of terms not limited to those described in the specification may be appropriately replaced as needed.

[0037] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection, an indirect connection via an intermediate component, or a connection within two components. Those skilled in the art will understand the specific meaning of these terms in this disclosure based on the specific circumstances.

[0038] In this specification, a transistor is a device that includes at least three terminals: a gate electrode, a drain electrode, and a source electrode. A transistor has a channel region between the drain electrode (drain electrode terminal, drain region, or drain electrode) and the source electrode (source electrode terminal, source region, or source electrode), and current can flow through the drain electrode, the channel region, and the source electrode. Note that in this specification, the channel region refers to the region through which current primarily flows.

[0039] In this specification, the first electrode can be the drain electrode and the second electrode can be the source electrode, or vice versa. In cases where transistors with opposite polarities are used or the current direction changes during circuit operation, the functions of the "source electrode" and "drain electrode" may sometimes be interchanged. Therefore, in this specification, the "source electrode" and "drain electrode" can be interchanged.

[0040] In this specification, "electrical connection" includes the situation where components are connected together by elements that have a certain electrical function. There are no particular limitations on what constitutes an "electrical function," as long as it allows for the transmission and reception of electrical signals between the connected components. Examples of "electrical functions" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other elements with various functions.

[0041] In this specification, "parallel" refers to the state where the angle formed by two straight lines is greater than or equal to -10° and less than 10°, and therefore also includes the state where the angle is greater than or equal to -5° and less than 5°. Similarly, "perpendicular" refers to the state where the angle formed by two straight lines is greater than or equal to 80° and less than 100°, and therefore also includes the state where the angle is greater than or equal to 85° and less than 95°.

[0042] In this specification, the terms "film" and "layer" may be interchanged. For example, "conductive layer" may sometimes be replaced with "conductive film." Similarly, "insulating film" may sometimes be replaced with "insulating layer."

[0043] In this disclosure, “about” means a value that is not strictly limited and allows for process and measurement errors.

[0044] The user-friendly experience and sleek design of foldable OLED displays are impressive. However, the touch design of foldable products faces technical challenges. Due to the unique and varied stacking structure of foldable OLEDs, the touch structure within foldable OLED displays can no longer meet the demands of new products. The variations in thickness and dielectric constant of the stacking structure in foldable OLED displays result in lower signal quantities for touch parameters, leading to a deterioration in the touch panel's performance.

[0045] Figure 1A This is a schematic diagram of the structure of a touch panel provided in an embodiment of this disclosure. Figure 1B for Figure 1A Cross-sectional view along the BB direction. Figure 1C for Figure 1A Cross-sectional view along the CC direction, Figure 2 This is an enlarged schematic diagram of region A in Figure 1. (See Figure 1 and...) Figure 2As shown in the figure, an embodiment of this disclosure provides a touch panel, including: a plurality of first touch structures 101 extending along a first direction D1 and a plurality of second touch structures 201 extending along a second direction D2. The plurality of first touch structures 101 are arranged along the second direction D2, and the plurality of second touch structures 201 are arranged along the first direction D1. In an exemplary embodiment, the first touch structure 101 may include: a plurality of first touch electrodes 10 and a plurality of first connecting portions 11, and the second touch structure 201 may include: a plurality of second touch electrodes 20 and a plurality of second connecting portions 21. The first direction D1 and the second direction D2 intersect. The first touch electrodes 10 and the second touch electrodes 20 are disposed in the same layer, and the first connecting portion 11 or the second connecting portion 21 is disposed in the same layer as the first touch electrode 10. Figures 1 to 201... Figure 2 The following explanation is based on the example of the first connecting part and the first touch electrode being arranged on the same layer.

[0046] The touch panel may further include at least one touch branch located at the edge of the touch electrode. The extension direction of each touch branch intersects the extension direction of the edge of the touch electrode where the touch branch is located, and the extension direction of the touch branch is different from the first direction D1 and the second direction D2. The touch electrode includes a first touch electrode 10 and / or a second touch electrode 20. The length of the touch branch is greater than the length of the connecting portion disposed in the same layer as the first touch electrode along a third direction. This third direction may be the same as the extension direction of a portion of the touch branch and intersect with both the first direction and the second direction. Figure 2 As shown, the length of the touch branch can be h1 or h2. Figure 2 The length of the connecting part disposed on the same layer as the first touch electrode along the third direction is L, which is the length of the first connecting part. Figure 2 This explanation uses the first and second touch electrodes as examples.

[0047] In one exemplary embodiment, a plurality of first touch electrodes 10 and a plurality of second touch electrodes 20 can be formed in the same patterning process. The first connecting portion 11 and the second connecting portion 21 are disposed in different layers.

[0048] In one exemplary embodiment, the first touch electrode 10 and the second touch electrode 20 can be disposed in the same layer and made of the same material, and have the same pattern. This can improve the problem of poor anti-reflection and optical moiré caused by mutual interference due to differences in line width and other factors in different layers of metal mesh, and has a better anti-reflection effect.

[0049] In one exemplary embodiment, the first touch electrode 10 and the second touch electrode 20 may be disposed on the same layer as the first connecting portion 11. The first touch electrode 10 and the first connecting portion 11 may be an integral structure that is interconnected, or multiple first touch electrodes 10, multiple second touch electrodes 20 and multiple second connecting portions 21 may be disposed on the same layer, and the second touch electrodes 20 and the second connecting portions 21 may be an integral structure that is interconnected.

[0050] In one exemplary embodiment, the first touch structure 101 may be a driving electrode (Tx) and the second touch structure 201 may be a sensing electrode (Rx), or the first touch structure 101 may be a sensing electrode (Rx) and the second touch structure 201 may be a driving electrode (Tx). This disclosure does not limit the scope of the invention in any way.

[0051] In one exemplary embodiment, the first touch electrode 10 and the second touch electrode 20 may have a rhomboid shape, such as a regular rhombus, a horizontally elongated rhombus, or a vertically elongated rhombus. Exemplarily, the first touch electrode 10 and the second touch electrode 20 may have any one or more of the following shapes: triangle, square, trapezoid, parallelogram, pentagon, hexagon, and other polygons, without limitation herein. Figure 1A and Figure 2 The explanation is based on the example of the first touch electrode 10 and the second touch electrode 20 being rhomboid in shape.

[0052] In one exemplary embodiment, the number of the first touch structure 101 and the second touch structure 201 can be set according to the touch accuracy.

[0053] The touch panel provided in this embodiment includes: a plurality of first touch structures extending along a first direction and a plurality of second touch structures extending along a second direction. The first touch structure includes: a plurality of first touch electrodes and a plurality of first connecting portions. The second touch structure includes: a plurality of second touch electrodes and a plurality of second connecting portions. The first touch electrodes and second touch electrodes are disposed in the same layer, and the first connecting portions or second connecting portions are disposed in the same layer as the first touch electrodes. The touch panel further includes: at least one touch branch located at the edge of the touch electrode. The extension direction of each touch branch intersects with the extension direction of the edge of the touch electrode where the touch branch is located. The extension direction of the touch branch is different from the first direction and the second direction. The touch electrode includes: a first touch electrode and / or a second touch electrode. The length of the touch branch is greater than the length of the connecting portion disposed in the same layer as the first touch electrode along a third direction. The third direction is the same as the extension direction of a portion of the touch branch and intersects with the first direction and the second direction. This disclosure increases the interaction area between the first touch structure and the second touch structure by making the length of the touch branch greater than the length of the connection portion disposed in the same layer as the first touch electrode, thereby increasing the mutual capacitance value, improving the signal quantity of the weak grounding parameter of the touch panel, and optimizing the touch performance of the touch panel.

[0054] In one exemplary embodiment, the touch branch may include: a branch body and at least one protrusion located at the edge of the branch body.

[0055] In one exemplary embodiment, when the number of touch branches is at least two, the at least two touch branches are spaced apart from each other, and the at least two touch branches are located on both sides of the touch electrode.

[0056] In one exemplary embodiment, the length of the branch body is greater than half the length of the touch electrode where the touch branch is located along the extension direction of the touch branch. In this disclosure, having a branch body longer than half the length of the touch electrode where the touch branch is located along the extension direction of the touch branch allows for a longer touch branch, increasing the interaction area between the first and second touch structures and increasing the mutual capacitance value.

[0057] In one exemplary embodiment, the branch body includes: a first side and a second side disposed opposite to each other, and a third side and a fourth side disposed opposite to each other; the third side is connected to the touch electrode where the touch branch is located; at least one protrusion is located on the first side and the second side of the branch body. The protrusion located on the first side of the branch body and the protrusion located on the second side of the branch body are alternately arranged. The alternate arrangement of the protrusions located on the first side and the protrusions located on the second side of the branch body can increase the stability and reliability of the touch branch structure.

[0058] In one exemplary embodiment, the width of the protrusion near the touch electrode where the touch branch is located is greater than the width of the protrusion away from the touch electrode. In this disclosure, having a wider protrusion near the touch electrode than the protrusion away from the touch electrode increases the surface area of ​​the touch branch, increases the interaction area between the first and second touch structures, and increases the mutual capacitance value of the touch panel.

[0059] In one exemplary embodiment, when the touch electrode includes a first touch electrode, the touch branch on the first touch electrode is a first touch branch, and the first touch branch may include a first branch body and at least one first protrusion located at the edge of the first branch body.

[0060] In one exemplary embodiment, when the number of first touch branches is at least two, the at least two first touch branches are spaced apart from each other, and the maximum spacing between adjacent first touch branches is about 100 micrometers to 150 micrometers.

[0061] In one exemplary embodiment, when the touch electrode includes a second touch electrode, the touch branch on the second touch electrode is a second touch branch, and the second touch branch may include a second branch body and at least one second protrusion located at the edge of the second branch body.

[0062] In one exemplary embodiment, when the number of second touch branches is at least two, the at least two second touch branches are spaced apart from each other, and the maximum spacing between adjacent second touch branches is approximately 100 micrometers to 150 micrometers.

[0063] In one exemplary embodiment, Figure 3 A schematic diagram of the structure of the first touch branch provided in an exemplary embodiment. Figure 4 A schematic diagram of the structure of a second touch branch provided as an exemplary embodiment. (See diagram below.) Figures 2 to 4 As shown, when the touch electrode includes a first touch electrode 10 and a second touch electrode 20, the touch branch on the first touch electrode 10 is a first touch branch 12, which includes a first branch body 12A and at least one first protrusion 12B located at the edge of the first branch body 12A. The touch branch on the second touch electrode 20 is a second touch branch 22, which includes a second branch body 22A and at least one second protrusion 22B located at the edge of the second branch body 22A. Figure 3 This explanation uses the first touch branch, which includes eight first protrusions, as an example. Figure 4 This explanation uses the second touch branch, which includes eight second protrusions, as an example.

[0064] In one exemplary embodiment, when the number of first touch branches 12 and second touch branches 22 is at least two, at least two first touch branches 12 are spaced apart from each other, and at least two second touch branches 22 are spaced apart from each other; at least one first touch branch 12 is located between adjacent second touch branches 22, and at least one second touch branch 22 is located between adjacent first touch branches 12.

[0065] In one exemplary embodiment, a first groove is formed between adjacent first touch branches, and a second touch branch is fitted into the first groove. The fitting of the second touch branch into the first groove means that when a portion of the first touch branch near the second touch branch is a protrusion, the corresponding portion of the second touch branch near the first touch branch is a groove; conversely, when a portion of the first touch branch near the second touch branch is a groove, the corresponding portion of the second touch branch near the first touch branch is a protrusion. Matching the edge of the second touch branch with the edges of two adjacent first touch branches increases the interaction area between the sensing electrode and the driving electrode, increases the mutual capacitance value, significantly improves the signal quantity of the weak grounding parameters of the touch panel, and optimizes the touch performance of the touch panel.

[0066] In one exemplary embodiment, a second groove is formed between adjacent second touch branches, and the first touch branch and the second groove are interlocked. In another exemplary embodiment, the interlocking of the first touch branch and the second groove means that when a portion of the second touch branch near the first touch branch is a protrusion, the corresponding area of ​​the first touch branch near the second touch branch is a groove; conversely, when a portion of the second touch branch near the first touch branch is a groove, the corresponding area of ​​the first touch branch near the second touch branch is a protrusion. Matching the edges of the second touch branches with the edges of two adjacent first touch branches increases the interaction area between the sensing electrode and the driving electrode, increases the mutual capacitance value, significantly improves the signal quantity of the weak grounding parameters of the touch panel, and optimizes the touch performance of the touch panel.

[0067] In one exemplary embodiment, the maximum spacing D1 between adjacent first touch branches can be greater than the maximum width W2 of the second touch branch.

[0068] In one exemplary embodiment, the maximum spacing D2 between adjacent second touch branches can be greater than the maximum width W1 of the first touch branch.

[0069] In one exemplary embodiment, the first touch branch 12 may have a serrated edge, which can increase the interaction area between the first touch structure and the second touch structure, increase the mutual capacitance value, improve the signal quantity of the weak grounding parameter of the touch panel, and optimize the touch performance of the touch panel.

[0070] In one exemplary embodiment, the second touch branch 22 may have a serrated edge, which can increase the interaction area between the first touch structure and the second touch structure, increase the mutual capacitance value, improve the signal quantity of the weak grounding parameter of the touch panel, and optimize the touch performance of the touch panel.

[0071] In one exemplary embodiment, the shape of the branch body includes a rectangle.

[0072] In one exemplary embodiment, the shape of the first branch body 12A may include a rectangle.

[0073] In one exemplary embodiment, the shape of the second branch body 22A may include a rectangle.

[0074] In one exemplary embodiment, the shape of the protrusion includes: a rectangle, a triangle, or a wave shape.

[0075] In one exemplary embodiment, the shape of the first protrusion 12B can be rectangular, triangular, or wavy.

[0076] In one exemplary embodiment, the shape of the second protrusion 22B is rectangular, triangular, or wavy.

[0077] In one exemplary embodiment, the first touch branch 12 and the first touch electrode 10 can be an integrally formed structure. This integrally formed structure simplifies the manufacturing process of the touch panel.

[0078] In one exemplary embodiment, the second touch branch 22 and the second touch electrode 20 can be a single integrated structure. This single integrated structure simplifies the manufacturing process of the touch panel.

[0079] In one exemplary embodiment, the length h1 of the first touch branch 12 is approximately 450 micrometers to 600 micrometers.

[0080] In one exemplary embodiment, the length h2 of the second touch branch 22 is approximately 450 micrometers to 600 micrometers.

[0081] like Figure 1B and 1CAs shown, an exemplary embodiment of the touch panel includes: a buffer layer 32, a bridging layer 33, an insulating layer 34, a touch layer 35, and a protective layer 36 sequentially stacked on a glass substrate 31. The touch layer 35 includes: a plurality of first touch electrodes 10, a plurality of first connecting portions 11, and a plurality of second touch electrodes 20; the plurality of first touch electrodes 10 and the plurality of first connecting portions 11 are alternately arranged and sequentially connected, and the plurality of second touch electrodes 20 are spaced apart. The bridging layer includes: a plurality of second connecting portions 21. Alternatively, the touch layer 35 includes: a plurality of second touch electrodes 20, a plurality of second connecting portions 21, and a plurality of first touch electrodes 10; the plurality of second touch electrodes 20 and the plurality of second connecting portions 21 are alternately arranged and sequentially connected, and the plurality of first touch electrodes 10 are spaced apart; the bridging layer includes: a plurality of first connecting portions 11. Figure 1B and 1C The illustration shows a touch layer 35 comprising: a plurality of first touch electrodes 10, a plurality of first connecting portions 11, and a plurality of second touch electrodes 20; the plurality of first touch electrodes 10 and the plurality of first connecting portions 11 are alternately arranged and sequentially connected, and the plurality of second touch electrodes 20 are spaced apart. The bridging layer comprises: a plurality of second connecting portions 21, as an example for illustration.

[0082] In one exemplary embodiment, the bridging layer 33 and the touch layer 35 can be made of metals, such as any one or more of silver (Ag), copper (Cu), aluminum (Al), titanium (Ti) and molybdenum (Mo), or alloys of the above metals, such as aluminum-neodymium alloy (AlNd) or molybdenum-niobium alloy (MoNb). They can be single-layer structures or multi-layer composite structures, such as Mo / Cu / Mo.

[0083] In one exemplary embodiment, the buffer layer 32 and the insulating layer 34 may be any one or more of silicon oxide (SiOx), silicon nitride (SiNx), and silicon oxynitride (SiON), and may be a single layer, multiple layers, or composite layers.

[0084] In one exemplary embodiment, the protective layer 36 may be a glass cover.

[0085] When the touch layer 35 includes: a plurality of first touch electrodes 10, a plurality of first connecting portions 11, and a plurality of second touch electrodes 20; the plurality of first touch electrodes 10 and the plurality of first connecting portions 11 are alternately arranged and sequentially connected, and the plurality of second touch electrodes 20 are spaced apart. When the bridging layer includes: a plurality of second connecting portions 21, Figure 5A A schematic diagram of the structure of the second connection portion provided as an exemplary embodiment is shown below. Figure 5B A schematic diagram of the structure of a first connecting portion provided for an exemplary embodiment. (See diagram below.) Figure 5AAs shown, each second connection portion may include two first connection structures 211 symmetrically arranged with respect to a first axis of symmetry. Each first connection structure 211 may include a first pad portion 212 and a first connecting bridge 213. The first pad portion 212 is configured to be connected to an adjacent second touch electrode through a via on an insulating layer, and the first connecting bridge 213 is configured to connect the first pad portion 212. The first axis of symmetry extends along a second direction.

[0086] In one exemplary embodiment, the first pad portion 212 may be disposed at both ends of the first connecting bridge 213.

[0087] In one exemplary embodiment, the first connecting bridge 213 may be a closed-loop structure composed of multiple first connecting lines, or an open-loop structure composed of multiple connecting lines arranged sequentially from smallest to largest. Figure 5A This will be illustrated by taking the example that the first connecting bridge can be a closed-loop structure composed of multiple first connecting lines.

[0088] In one exemplary embodiment, the first pad portion 212 located at the end of the first connecting bridge 213 may include two to four pads, and the multiple pads may be arranged in a line shape, a triangular shape, or a square shape.

[0089] like Figure 5B As shown, each first connection portion 11 includes: a first sub-connection portion 111 and a second sub-connection portion 112 that are interconnected. The first sub-connection portion 111 and the second sub-connection portion 112 are respectively located on the first touch branch of the two first touch electrodes connected by the first connection portion 11.

[0090] In one exemplary embodiment, the first connecting portion 11 may further include a first sub-connecting structure 113 located at the first sub-connecting portion 111 and the second sub-connecting portion 112. The first sub-connecting portion 111, the second sub-connecting portion 112, and the first sub-connecting structure 113 are integrally formed.

[0091] In one exemplary embodiment, the first sub-connecting portion 111 extends along a third direction. l 1 and the length of the second sub-connection 112 along the third direction l 2 can all be less than half the length of the first touch branch 12.

[0092] When the touch layer 35 includes: a plurality of second touch electrodes 20, a plurality of second connecting portions 21, and a plurality of first touch electrodes 10; the plurality of second touch electrodes 20 and the plurality of second connecting portions 21 are alternately arranged and sequentially connected, and the plurality of first touch electrodes 10 are spaced apart; and the bridging layer includes: a plurality of first connecting portions 11 Figure 6A A schematic diagram of the structure of the first connecting portion provided in an exemplary embodiment Figure 2 , Figure 6B Schematic diagram of the structure of the second connection portion provided in an exemplary embodiment Figure 2 .like Figure 6A As shown, each first connection portion may include two second connection structures 114 symmetrically arranged with respect to a second axis of symmetry. Each second connection structure 114 may include a second pad portion 115 and a second connecting bridge 116; the second pad portion 115 is configured to be connected to an adjacent first touch electrode through a via on an insulating layer, and the second connecting bridge 116 is configured to connect the second pad portion 115. The second axis of symmetry extends along a first direction.

[0093] In one exemplary embodiment, the second pad portion 115 may be disposed at both ends of the second connecting bridge 116.

[0094] In one exemplary embodiment, the second pad portion 115 located at the end of the second connecting bridge 116 may include two to four pads, and the multiple pads may be arranged in a line shape, a triangular shape, or a square shape.

[0095] In one exemplary embodiment, the second connecting bridge can be a closed-loop structure composed of multiple second connecting lines, or an open-loop structure composed of multiple connecting lines arranged sequentially from smallest to largest. Figure 6A This will be illustrated by taking the example that the second connecting bridge can be a closed-loop structure composed of multiple second connecting lines.

[0096] like Figure 6B As shown, each second connection portion includes a third sub-connection portion 214 and a fourth sub-connection portion 215 that are interconnected. The third sub-connection portion 214 and the fourth sub-connection portion 215 are respectively located on the second touch branches 22 of the two second touch electrodes connected by the second connection portion.

[0097] In one exemplary embodiment, the third sub-connection portion 214 extends along a third direction. l The length of the third and fourth sub-connecting parts 215 along the third direction l 4 are all less than half the length of the second touch branch.

[0098] In one exemplary embodiment, the second connecting portion may further include a second sub-connecting structure 216 located between the third sub-connecting portion 214 and the fourth sub-connecting portion 215. The third sub-connecting portion 214, the fourth sub-connecting portion 215, and the second sub-connecting structure 216 are integrally formed structures.

[0099] In one exemplary embodiment, the first touch electrode 10, the second touch electrode 20, the first connecting portion 11, the second connecting portion 21, and the touch branch all include: a plurality of grid patterns; wherein the grid patterns are polygons composed of metal wires.

[0100] In one exemplary embodiment, the first touch electrode 10, the second touch electrode 20, the first connecting portion 11, the second connecting portion 21, and the touch branch all include multiple grid patterns. Since metal materials have better ductility and are less prone to breakage, using metal grids can improve the bending performance of the touch panel, making it more suitable for implementing flexible touch functions, and also reducing costs.

[0101] In one exemplary embodiment, Figures 7-1 to 7-5 Figure 5 shows schematic diagrams of several metal mesh structures. As shown, a metal mesh includes multiple mesh patterns, each a polygon formed by metal wires. Alternatively, a metal mesh is formed by repeating and continuously splicing mesh patterns. In one exemplary embodiment, the shape of the mesh pattern formed by the metal wires can be rhomboid, such as... Figure 7-1 As shown. Alternatively, the grid pattern formed by the metal wires can be triangular, such as... Figure 7-2 As shown. Alternatively, the grid pattern formed by the metal wires can be rectangular, such as... Figure 7-3 As shown. Alternatively, the grid pattern formed by the metal wires can be hexagonal, such as... Figure 7-4 As shown. Alternatively, the grid pattern formed by the metal wires can be a combination of various shapes, such as a combination of pentagons and hexagons, as shown. Figure 7-5 As shown. Alternatively, the shape of the grid pattern formed by the metal wires can include any one or more of triangles, squares, rectangles, rhombuses, trapezoids, pentagons, and hexagons. Exemplarily, the grid pattern formed by the metal wires can be a regular shape or an irregular shape, and the edges of the grid pattern can be straight lines or curves, without limitation herein.

[0102] In one exemplary embodiment, Figure 8 This is an enlarged view of region A in Figure 1. Figure 2 , Figure 9 A magnified view of region A in Figure 1 Figure 3 , Figure 10 This is an enlarged view of region A in Figure 1. Figure 4 , Figure 11 This is a magnified schematic diagram of region A in Figure 1, shown in Figure 5. Figure 2 , Figures 8 to 11 As shown, the first touch electrode 10 can be a planar electrode, or it can include: a plurality of first electrodes 110 extending along a fourth direction and a plurality of second electrodes 120 extending along a fifth direction. Each of the first electrodes 110 and the second electrodes 120 includes a plurality of grid patterns, and a plurality of virtual regions 300 are defined between the plurality of first electrodes and the plurality of second electrodes. The fourth and fifth directions intersect, and both the fourth and fifth directions are different from the first and second directions. The third direction can be the same as the fourth or fifth direction; this disclosure does not limit its application in this regard.

[0103] In one exemplary embodiment, the second touch electrode 20 may be a planar electrode, or may include a plurality of third electrodes 210 extending along a fifth direction and a plurality of fourth electrodes 220 extending along a fourth direction. Both the third electrodes 210 and the fourth electrodes 220 include a plurality of grid patterns, and a plurality of virtual regions 300 are defined between the plurality of third electrodes and the plurality of fourth electrodes. Figure 2 , Figure 8 and Figure 9 The following description is based on the example of a first touch electrode 10 comprising multiple first electrodes 110 and multiple second electrodes 120, and a second touch electrode comprising multiple third electrodes 210 and multiple fourth electrodes 220. Figure 10 The following description is based on the example of a first touch electrode 10 being a planar electrode and a second touch electrode including multiple third electrodes 210 and multiple fourth electrodes 220. Figure 11 The following description uses the example of a first touch electrode 10 comprising multiple first electrodes 110 and multiple second electrodes 120, with the second touch electrode 20 being a planar electrode.

[0104] In one exemplary embodiment, when the first touch electrode includes a plurality of first electrodes and a plurality of second electrodes, the width of the first boundary electrode is smaller than the width of the first non-boundary electrode, and the width of the second boundary electrode is smaller than the width of the second non-boundary electrode. Specifically, the first boundary electrode is the first electrode closer to the second touch electrode, and the second non-boundary electrode is the first electrode located on the side of the first boundary electrode away from the second touch electrode; the second boundary electrode is the second electrode closer to the second touch electrode, and the second non-boundary electrode is the second electrode located on the side of the second boundary electrode away from the second touch electrode.

[0105] In one exemplary embodiment, when the second touch electrode includes a plurality of third electrodes and a plurality of fourth electrodes, the width of the third boundary electrode is smaller than the width of the third non-boundary electrode, and the width of the fourth boundary electrode is smaller than the width of the fourth non-boundary electrode; wherein, the third boundary electrode is the third electrode close to the first touch electrode, and the third non-boundary electrode is the third electrode located on the side of the third boundary electrode away from the first touch electrode; the fourth boundary electrode is the fourth electrode close to the first touch electrode, and the fourth non-boundary electrode is the fourth electrode located on the side of the fourth boundary electrode away from the first touch electrode.

[0106] In one exemplary embodiment, such as Figure 8 and 9 As shown, a first branch segment 13 and a second branch segment 14 are respectively provided on the first electrode 110 and the second electrode 120 forming the virtual region 300. The first branch segment 13 and the second branch segment 14 located in the same virtual region 300 can be arranged at intervals or connected to each other. Figure 8The example given is the spacing between the first branch segment 13 and the second branch segment 14, which are located within the same virtual region 300. Figure 9 The example given is the interconnection between the first branch segment 13 and the second branch segment 14, which are located within the same virtual region.

[0107] In one exemplary embodiment, both the first branch segment 13 and the second branch segment 14 may include multiple grid patterns; In one exemplary embodiment, the shapes of the first branch segment 13 and the second branch segment 14 may include: a cross shape or a square shape.

[0108] In one exemplary embodiment, the area of ​​the virtual region in the touch panel provided with the first branch segment 13 and the second branch segment 14 is smaller than the area of ​​the virtual region in the touch panel without the first branch segment 13 and the second branch segment 14.

[0109] In one exemplary embodiment, such as Figure 8 and 9 As shown, a third branch segment 23 and a fourth branch segment 24 are respectively provided on the third electrode 210 and the fourth electrode 220 forming the virtual region 300. The third branch segment 23 and the fourth branch segment 24 located in the same virtual region can be arranged alternately or connected to each other. Figure 8 The example given is the spacing between the third branch segment 23 and the fourth branch segment 24, which are located within the same virtual region 300. Figure 9 The example given is the interconnection between the third branch segment 23 and the fourth branch segment 24, which are located within the same virtual region.

[0110] In one exemplary embodiment, both the third branch segment 23 and the fourth branch segment 24 may include multiple grid patterns; In one exemplary embodiment, the shapes of the third branch segment 23 and the fourth branch segment 24 may include: a cross shape or a square shape.

[0111] In one exemplary embodiment, the area of ​​the virtual region in the touch panel provided with the third branch segment 23 and the fourth branch segment 24 is smaller than the area of ​​the virtual region in the touch panel without the third branch segment 23 and the fourth branch segment 24.

[0112] In one exemplary embodiment, the touch panel may further include a metal structure disposed on the same layer as the touch electrodes. The metal structure is located within a virtual area and includes a plurality of grid patterns. The metal structure operates without voltage during touch operation.

[0113] Figure 12 This is a schematic diagram of the structure of a touch panel provided as an exemplary embodiment. Figure 12As shown, an exemplary embodiment of the touch panel may further include: multiple first touch traces 102 and multiple second touch traces 202 located in the touch layer.

[0114] In one exemplary embodiment, the first touch trace 102 is connected to the first touch structure 101, and different first touch traces 102 are connected to different first touch structures 101.

[0115] In one exemplary embodiment, the second touch trace 202 is connected to the second touch structure 201, and different second touch traces 202 are connected to different second touch structures 201.

[0116] In one exemplary embodiment, the first touch trace and the first touch electrode can be an integrally formed structure.

[0117] In one exemplary embodiment, the second touch trace and the second touch electrode can be an integrally formed structure.

[0118] In one exemplary embodiment, the first touch trace 102 may be connected to the first end and the second end of the first touch structure.

[0119] In one exemplary embodiment, the second touch trace 202 may be connected to one end of the second touch structure.

[0120] In one exemplary embodiment, taking a first touch structure as the driving electrode and a second touch structure as the sensing electrode as an example, when the touch panel is working, a driving signal is input to the first first touch structure, and each second touch structure receives the signal sequentially. Then, a driving signal is input to the second first touch structure, and so on, until a driving signal is input to the last first touch structure. Touching the touch panel with a finger causes a change in the mutual capacitance between the first and second touch structures. The position of the finger is determined based on this change in mutual capacitance.

[0121] Taking a touch panel mounted on a display panel as an example, Table 1 shows the simulation results of various touch parameters for different touch panels. Touch panel 1 refers to a touch panel where the edge of the first touch branch is not jagged and the length of the first touch branch is less than 400 micrometers. Touch panels 2 and 3 refer to touch panels where the edge of the first touch branch is jagged and the length of the first touch branch is greater than 400 micrometers. The first touch branch includes a virtual area containing a first branch segment, a second branch segment, a third branch segment, and a fourth branch segment. The length of the touch branch in touch panel 3 is greater than that in touch panel 2, and the number of protrusions in the touch branch of touch panel 3 is greater than that in touch panel 2. The touch branch includes a first touch branch and a second touch branch. In touch panel 2, the first and second branch segments located in the same virtual area are spaced apart, and the third and fourth branch segments located in the same virtual area are also spaced apart. The first and second branch segments in the same virtual area of ​​the touch panel 3 are interconnected, and the third and fourth branch segments in the same virtual area are interconnected.

[0122] Table 1 TX / RX refers to the number of driving electrodes (TX) and sensing electrodes (RX). Cm1 is the mutual capacitance between the driving electrodes (TX) and sensing electrodes (RX) before touch. Cm2 is the mutual capacitance between the driving electrodes (TX) and sensing electrodes (RX) after touch. ΔCm is the change in mutual capacitance before and after touch, ΔCm = |Cm2 - Cm1|. ΔCm / Cm1 is the ratio of the change in mutual capacitance before and after touch to the mutual capacitance between the driving electrodes (TX) and sensing electrodes (RX) before touch. CpTx is the parasitic capacitance between the driving electrodes and the electrode layer in the display panel. CpRx is the parasitic capacitance between the sensing electrodes and the electrode layer in the display panel. CfTx is the capacitance between the driving electrodes and the touch object. CfRx is the capacitance between the sensing electrodes and the touch object. Rtx is the resistance of the driving electrodes (TX). Rrx is the resistance of the sensing electrodes (RX). LGM is the low ground parameter. GroundMass), weak grounding parameter LGM=ΔCm / CfTx+ΔCm / CfRx. The parameters in Table 1 are all obtained from simulations using copper as the material of the touch object.

[0123] In one exemplary embodiment, weak grounding refers to a situation where the device including the touch panel and the human body do not share a common ground. In a weak grounding state, the retransmission effect is significant, increasing the difficulty of charge transfer to the ground. This results in a smaller change in the measured mutual capacitance value, making accurate touch recognition difficult. Therefore, touch performance is poor in a weak grounding state. A larger weak grounding parameter leads to better touch performance.

[0124] As shown in Table 1, compared to Touch Panel 2, Touch Panel 1 has 39 driving electrodes and 34 sensing electrodes, while Touch Panel 2 has 40 driving electrodes and 17 sensing electrodes. The sum of the number of sensing electrodes and driving electrodes in Touch Panel 1 is greater than that in Touch Panel 2. Although the sum of the number of sensing electrodes and driving electrodes in Touch Panel 1 is greater than that in Touch Panel 2, the edges of the first and second touch branches of Touch Panel 2 are serrated, and the lengths of the first and second touch branches are greater than the threshold length. Therefore, Cm1 and Cm2 of Touch Panel 2 are both greater than those of Touch Panel 1. This verifies that the arrangement of the first and second touch branches in this disclosure increases the interaction area between the sensing electrodes and driving electrodes, thereby increasing the mutual capacitance value. The ΔCm of touch panel 2 is greater than that of touch panel 1, and the ΔCm / Cm1 of touch panel 2 is less than that of touch panel 1. The CpTx and CpRx of touch panel 2 are both greater than those of touch panel 1, while the CfTx and CfRx of touch panel 2 are both less than those of touch panel 1. The LGM of touch panel 2 is greater than that of touch panel 1. The configuration of the first and second touch branches in this disclosure increases the signal quantity of the weak grounding parameters of the touch panel, thus improving the touch performance. The Rtx and Rrx of touch panel 2 are both less than those of touch panel 1. Compared with touch panel 1, touch panel 2 has lower resistance in its sensing and driving electrodes, reducing the load on the touch panel and improving its touch performance.

[0125] As shown in Table 1, both touch panel 1 and touch panel 3 are based on 39 driving electrodes and 34 sensing electrodes. Since the edges of the first and second touch branches of touch panel 3 are serrated, and the lengths of the first and second touch branches are greater than the threshold length, the values ​​of Cm1 and Cm2 of touch panel 3 are both greater than those of touch panel 1. This verifies that the arrangement of the first and second touch branches in this disclosure increases the interaction area between the sensing and driving electrodes, thus increasing the mutual capacitance value. The ΔCm of touch panel 3 is greater than that of touch panel 1, and the ΔCm / Cm1 of touch panel 3 is less than that of touch panel 1. The values ​​of CpTx and CpRx of touch panel 3 are both greater than those of touch panel 1, while the values ​​of CfTx and CfRx of touch panel 3 are less than those of touch panel 1. The LGM of touch panel 3 is greater than that of touch panel 1. The configuration of the first and second touch branches in this disclosure increases the signal quantity of the weak ground parameters of the touch panel, thereby improving the touch performance. The Rtx and Rrx of touch panel 3 are both smaller than those of touch panel 1. Compared to touch panel 1, touch panel 3 has lower resistance in its sensing and driving electrodes, reducing the load on the touch panel and thus improving its touch performance.

[0126] As shown in Table 1, compared to touch panel 2, touch panel 3 has 39 driving electrodes and 34 sensing electrodes, while touch panel 2 has 40 driving electrodes and 17 sensing electrodes. The sum of the number of sensing electrodes and driving electrodes in touch panel 3 is greater than that in touch panel 2. The values ​​of Cm1 and Cm2 in touch panel 2 are both greater than those in touch panel 3. The ΔCm of touch panel 2 is greater than that in touch panel 3, but the ΔCm / Cm1 ratio of touch panel 2 is less than that of touch panel 3. The values ​​of CpTx and CpRx in touch panel 3 are both greater than those in touch panel 2, while the values ​​of CfTx and CfRx in touch panel 3 are less than those in touch panel 2. The LGM of touch panel 2 is greater than that of touch panel 3. The Rtx and Rrx of touch panel 3 are both smaller than those of touch panel 2. Compared to touch panel 2, touch panel 3 has lower resistance in its sensing and driving electrodes, reducing the load on the touch panel and improving its touch performance. The LGM, Cm1, and Cm2 of a touch panel are not directly proportional to the sum of the number of sensing and driving electrodes; that is, a larger sum of sensing and driving electrodes does not necessarily result in larger LGM, Cm1, and Cm2. A larger sum of sensing and driving electrodes results in larger CfTx, CfRx, CfTx, and CfRx. A smaller virtual area in the touch panel results in a smaller LGM. Longer touch branches and more protrusions in the touch branches lead to a larger ΔCm / Cm1 and a larger LGM.

[0127] Taking a touch panel mounted on a display panel as an example, Table 2 shows the simulation results of various touch parameters for different touch panels. Among them, touch panels 4 to 9 are all touch panels where the edges of the first and second touch branches are jagged, and the lengths of the first and second touch branches are greater than a threshold length. Touch panel 4 is... Figure 8 The provided touch panels, touch panel 5 and touch panel 6 are Figure 9 The provided touch panel, touch panel 7 is Figure 2 The provided touch panels, touch panel 8 and touch panel 9 are Figure 10The provided touch panels differ in that touch panel 5, compared to touch panel 4, has a smaller virtual area than touch panel 4, and the lengths of its first and second touch branches are greater than those of touch panel 4. Touch panel 6, compared to touch panel 5, has a smaller virtual area than touch panel 5. Touch panel 7, compared to touch panel 5, has a larger virtual area than touch panel 5, and its virtual area is square. Touch panel 8, compared to touch panel 6, does not include a virtual area in its sensing electrodes. Touch panel 9, compared to touch panel 8, has a shorter first and second touch branch than touch panel 8.

[0128] Table 2 As shown in Table 2, touch panels 4 to 9 all use 40 driving electrodes and 17 sensing electrodes, and the material used to make the touch panel is copper for protection.

[0129] As shown in Table 2, compared to touch panel 4, touch panel 5 has larger Cm1 and Cm2 values. Touch panel 5's ΔCm is greater than touch panel 4's ΔCm, while touch panel 5's ΔCm / Cm1 is less than touch panel 4's ΔCm / Cm1. Touch panel 5's CpTx and CpRx are both greater than touch panel 4's CpTx and CpRx, and touch panel 5's CfTx and CfRx are both greater than touch panel 4's CfTx and CfRx. Touch panel 5's LGM is greater than touch panel 4's LGM. Touch panel 5's Rtx and Rrx are both greater than touch panel 4's Rtx and Rrx. The smaller the virtual area in the touch panel, the longer the length of the first touch branch and the second touch branch, and the larger the Cm1, Cm2, ΔCm, CpTx, CpRx, CfTx, CfRx, LGM, Rtx and Rrx of the touch panel.

[0130] As shown in Table 2, compared to touch panel 5, touch panel 6 has smaller Cm1 and Cm2 values. Touch panel 6's ΔCm is greater than touch panel 5's ΔCm, and touch panel 6's ΔCm / Cm1 is also greater than touch panel 5's ΔCm / Cm1. Touch panel 6's CpTx and CpRx are both greater than touch panel 5's CpTx and CpRx, and touch panel 6's CfTx and CfRx are both greater than touch panel 5's CfTx and CfRx. Touch panel 6's LGM is smaller than touch panel 5's LGM. Touch panel 6's Rtx and Rrx are both smaller than touch panel 5's Rtx and Rrx. The smaller the virtual area in the touch panel, the smaller Cm1, Cm2, LGM, Rtx and Rrx of the touch panel, and the larger ΔCm, ΔCm / Cm1, CpTx, CpRx, CfTx and CfRx.

[0131] As shown in Table 2, compared to touch panel 5, touch panel 7 has smaller Cm1 and Cm2 values. Touch panel 7's ΔCm is greater than touch panel 5's ΔCm, and touch panel 7's ΔCm / Cm1 is also greater than touch panel 5's ΔCm / Cm1. Touch panel 7's CpTx and CpRx are both smaller than touch panel 5's CpTx and CpRx, and touch panel 7's CfTx and CfRx are both smaller than touch panel 5's CfTx and CfRx. Touch panel 7's LGM is greater than touch panel 5's LGM. Touch panel 7's Rtx and Rrx are both smaller than touch panel 5's Rtx and Rrx. The larger the virtual area in the touch panel, the larger Cm1, Cm2, CpTx, CpRx, CfTx, and CfRx are, and the smaller ΔCm, ΔCm / Cm1, LGM, Rtx, and Rrx are.

[0132] As shown in Table 2, compared to touch panel 6, touch panel 8 has larger Cm1 and Cm2 values. Touch panel 8's ΔCm is greater than touch panel 6's ΔCm, and touch panel 8's ΔCm / Cm1 is also greater than touch panel 6's ΔCm / Cm1. Touch panel 8's CpTx is less than touch panel 6's CpTx, touch panel 8's CpRx is greater than touch panel 6's CpRx, touch panel 8's CfTx is equal to touch panel 6's CfTx, and touch panel 8's CfRx is greater than touch panel 6's CfRx. Touch panel 8's LGM is less than touch panel 6's LGM. Touch panel 8's Rtx is greater than touch panel 6's Rtx, and touch panel 8's Rrx is less than touch panel 6's Rrx. A touch panel with one electrode that does not include a virtual area is smaller than a touch panel with two electrodes that both include virtual areas.

[0133] As shown in Table 2, compared to touch panel 8, touch panel 9 has smaller Cm1 and Cm2 values. Touch panel 9's ΔCm is smaller than touch panel 8's ΔCm, and touch panel 9's ΔCm / Cm1 is smaller than touch panel 8's ΔCm / Cm1. Touch panel 9's CpTx and CpRx are greater than or equal to touch panel 8's CpTx and CpRx, while touch panel 9's CfTx and CfRx are equal to touch panel 8's CfTx and CfRx. Touch panel 9's LGM is smaller than touch panel 8's LGM. Touch panel 9's Rtx and Rrx are smaller than touch panel 8's Rtx and Rrx. The smaller the length of the first touch branch and the length of the second touch branch in the touch panel, the smaller Cm1, Cm2, ΔCm, ΔCm / Cm1, CpTx, CpRx, LGM, Rtx and Rrx are.

[0134] This disclosure also provides a touch display panel. Figure 13 This is a schematic diagram of the structure of a touch display panel provided in an embodiment of this disclosure. Figure 13 As shown, the touch display panel provided in this embodiment includes a display panel 100 and a touch panel 200.

[0135] In one exemplary embodiment, the touch panel 200 may be located on the light-emitting side of the display panel 100 or on the backlight side opposite to the light-emitting side. Figure 13 This explanation uses the example of the touch panel being located on the light-emitting side of the display panel.

[0136] In one exemplary embodiment, the display panel may be a liquid crystal display (LCD) panel, an organic light-emitting diode (OLED) display panel, a plasma display panel (PDP), an electrophoretic display (EPD) panel, or a quantum dot light-emitting diode (QLED) display panel.

[0137] Figure 14 This is a schematic diagram of a planar structure of a display panel. On a plane parallel to the display panel, the display panel may include multiple pixel units arranged in a regular pattern.

[0138] In one exemplary embodiment, each pixel unit may include 3 sub-pixels, 4 sub-pixels, or multiple sub-pixels. When a pixel unit includes 3 sub-pixels, the 3 sub-pixels include a first sub-pixel emitting a first color light, a second sub-pixel emitting a second color light, and a third sub-pixel emitting a third color light. When a pixel unit includes 4 sub-pixels, the 4 sub-pixels include a first sub-pixel emitting a first color light, a second sub-pixel emitting a second color light, a third sub-pixel emitting a third color light, and a fourth sub-pixel emitting a fourth color light. As an example, Figure 12 The pixel unit 50 shown includes 4 sub-pixels, namely the first sub-pixel 51, the second sub-pixel 52, the third sub-pixel 53 and the fourth sub-pixel 54. The shape of the 4 sub-pixels is square, and they are arranged in a square manner.

[0139] In one exemplary embodiment, the first sub-pixel 51 and the fourth sub-pixel 54 are green sub-pixels emitting green (G) light, the second sub-pixel 52 is a red sub-pixel emitting red (R) light, and the third sub-pixel 53 is a blue sub-pixel emitting blue (B) light, forming a pixel unit 50 arranged in an RGGB square pattern. In some possible implementations, the first sub-pixel 51 may be a green sub-pixel, the second sub-pixel 52 may be a red sub-pixel, the third sub-pixel 53 may be a blue sub-pixel, and the fourth sub-pixel 54 may be a white (W) sub-pixel, forming a pixel unit 50 arranged in an RGBW square pattern.

[0140] In one exemplary embodiment, a pixel unit may include red sub-pixels, green sub-pixels, blue sub-pixels, cyan sub-pixels, magenta sub-pixels, yellow sub-pixels, and white sub-pixels.

[0141] In one exemplary embodiment, the four sub-pixels included in the pixel unit 50 may take on various shapes and be arranged in various ways. Figures 15-1 to 15-3 This is a schematic diagram of the structure of several pixel units. The four sub-pixels can be rectangular, arranged side-by-side, from left to right as: R sub-pixel, G sub-pixel, B sub-pixel, and G sub-pixel, as shown below. Figure 15-1 As shown. Alternatively, the four sub-pixels can be arranged side-by-side using pentagonal and hexagonal shapes respectively, with the two pentagonal G sub-pixels located in the center of the pixel unit, and the hexagonal R sub-pixels and hexagonal B sub-pixels located on either side of the G sub-pixels, as shown. Figure 15-2 As shown. In one exemplary embodiment, when pixel unit 50 includes 3 sub-pixels, the 3 rectangular sub-pixels can be arranged side-by-side in a horizontal direction, or they can be arranged side-by-side in a vertical direction, as shown. Figure 15-3 As shown.

[0142] In one exemplary embodiment, the shape of the sub-pixels can be any one or more of triangles, squares, rectangles, rhombuses, trapezoids, parallelograms, pentagons, hexagons, and other polygons, and the arrangement can be X-shaped, cross-shaped, or triangular, etc., which are not limited herein.

[0143] Figure 16 This is a cross-sectional structural diagram of a display panel, illustrating the structure of two sub-pixels when the display panel is an OLED display panel. Figure 16As shown, on a plane perpendicular to the display panel, the display panel includes a driving circuit layer 62 disposed on a flexible substrate 61, a light-emitting structure layer 63 disposed on the driving circuit layer 62, and an encapsulation layer 64 disposed on the light-emitting structure layer 63.

[0144] In one exemplary embodiment, the touch panel may be disposed on the encapsulation layer 64 to form a Touch on Thin Film Encapsulation (TFE) structure.

[0145] In one exemplary embodiment, the display panel may include other film layers, and other film layers may be disposed between the touch panel and the encapsulation layer, which is not limited herein.

[0146] In one exemplary embodiment, the flexible substrate 61 may include a first flexible material layer, a first inorganic material layer, a semiconductor layer, a second flexible material layer, and a second inorganic material layer stacked together. The materials of the first flexible material layer and the second flexible material layer may be polyimide (PI), polyethylene terephthalate (PET), or a surface-treated polymer film, etc. The materials of the first inorganic material layer and the second inorganic material layer may be silicon nitride (SiNx) or silicon oxide (SiOx), etc., to improve the substrate's resistance to water and oxygen. The material of the semiconductor layer may be amorphous silicon (a-Si).

[0147] In one exemplary embodiment, the driving circuit layer 62 may include transistors and storage capacitors constituting pixel circuits.

[0148] In one exemplary embodiment, the pixel circuit may be a 3T1C, 4T1C, 5T1C, 5T2C, 6T1C, or 7T1C structure.

[0149] Figure 15 illustrates an example where each sub-pixel includes a transistor and a storage capacitor. In an exemplary embodiment, the driving circuit layer 62 of each sub-pixel may include: a first insulating layer disposed on a flexible substrate, an active layer disposed on the first insulating layer, a second insulating layer covering the active layer, a first metal layer disposed on the second insulating layer, the first metal layer including a gate electrode and a first capacitor electrode, a third insulating layer covering the gate electrode and the first capacitor electrode, a second metal layer disposed on the third insulating layer, the second metal layer including a second capacitor electrode, a fourth insulating layer covering the second capacitor electrode, a via formed in the fourth insulating layer exposing the active layer, and a third metal layer disposed on the fourth insulating layer, the third metal layer including a source electrode and a drain electrode, the source electrode and the drain electrode being connected to the active layer through the via and a planarization layer covering the aforementioned structure. The active layer, gate electrode, source electrode, and drain electrode constitute a transistor, and the first capacitor electrode and the second capacitor electrode constitute a storage capacitor.

[0150] In one exemplary embodiment, the active layer may be made of amorphous indium gallium zinc oxide (a-IGZO), zinc oxynitride (ZnON), indium zinc tin oxide (IZTO), amorphous silicon (a-Si), polycrystalline silicon (p-Si), hexathiophene, or polythiophene, etc. This disclosure is applicable to transistors manufactured based on oxide technology, silicon technology, or organic technology.

[0151] In one exemplary embodiment, the first insulating layer, the second insulating layer, the third insulating layer, and the fourth insulating layer may be any one or more of silicon oxide (SiOx), silicon nitride (SiNx), and silicon oxynitride (SiON), and may be a single layer, multiple layers, or composite layers. The first insulating layer may be referred to as a buffer layer to improve the substrate's resistance to water and oxygen, the second and third insulating layers may be referred to as gate insulating (GI) layers, and the fourth insulating layer may be referred to as an interlayer insulating (ILD) layer.

[0152] In one exemplary embodiment, the first metal layer, the second metal layer, and the third metal layer may be made of any one or more of the following metallic materials: silver (Ag), copper (Cu), aluminum (Al), titanium (Ti), and molybdenum (Mo), or alloys of the above metals, such as aluminum-neodymium alloy (AlNd) or molybdenum-niobium alloy (MoNb). They may be single-layer structures or multi-layer composite structures, such as Ti / Al / Ti.

[0153] In one exemplary embodiment, the planarization layer may be made of an organic material, and the transparent conductive film may be made of indium tin oxide (ITO) or indium zinc oxide (IZO).

[0154] In one exemplary embodiment, the light-emitting structure layer 63 may include an anode, a pixel definition layer, an organic light-emitting layer, and a cathode. The anode is disposed on the planarization layer and connected to the drain electrode through a via formed in the planarization layer. The pixel definition layer is disposed on the anode and the planarization layer and has a pixel opening that exposes the anode. The organic light-emitting layer is disposed inside the pixel opening, and the cathode is disposed on the organic light-emitting layer. The organic light-emitting layer emits light of the corresponding color under the action of a voltage applied to the anode and the cathode.

[0155] In one exemplary embodiment, the anode may be made of a transparent conductive material.

[0156] In one exemplary embodiment, the pixel definition layer may be made of polyimide, acrylic, or polyethylene terephthalate.

[0157] In one exemplary embodiment, the organic light-emitting layer may include a stacked hole injection layer (HIL), a hole transport layer (HTL), an electron block layer (EBL), an emitting layer (EML), a hole block layer (HBL), an electron transport layer (ETL), and an electron injection layer (EIL).

[0158] In one exemplary embodiment, the hole injection layer of all sub-pixels can be a common layer connected together, the electron injection layer of all sub-pixels can be a common layer connected together, the hole transport layer of all sub-pixels can be a common layer connected together, the electron transport layer of all sub-pixels can be a common layer connected together, the hole blocking layer of all sub-pixels can be a common layer connected together, the light emission layers of adjacent sub-pixels can have a small overlap or can be isolated, and the electron blocking layers of adjacent sub-pixels can have a small overlap or can be isolated.

[0159] In one exemplary embodiment, the cathode may be any one or more of magnesium (Mg), silver (Ag), aluminum (Al), copper (Cu) and lithium (Li), or may be an alloy made of any one or more of the aforementioned metals.

[0160] In one exemplary embodiment, the encapsulation layer 64 may include a first encapsulation layer, a second encapsulation layer and a third encapsulation layer stacked together. The first encapsulation layer and the third encapsulation layer may be made of inorganic materials, while the second encapsulation layer may be made of organic materials. The second encapsulation layer is disposed between the first encapsulation layer and the third encapsulation layer to ensure that external moisture cannot enter the light-emitting structure layer 63.

[0161] In one exemplary embodiment, the display panel and the touch panel are integrated together, which has the advantages of being thin, light and foldable, and can meet the product requirements such as flexible folding and narrow bezels.

[0162] In one exemplary embodiment, such as Figure 16 As shown, the display panel substrate includes a light-emitting area P1 and a non-light-emitting area P2. The light-emitting area P1 includes a plurality of periodically arranged sub-pixels, and the non-light-emitting area P2 includes sub-pixel edges located between adjacent sub-pixels. The display panel includes a display area and a non-display area. The display area includes a light-emitting area and a first non-light-emitting area. The non-display area includes a second non-light-emitting area, which is composed of the first non-light-emitting area and the second non-light-emitting area.

[0163] In one exemplary embodiment, the touch panel includes a plurality of metal grids composed of metal lines, wherein the area enclosed by the orthographic projection of the metal lines onto the substrate contains the orthographic projection of at least one sub-pixel onto the substrate, and the orthographic projection of the sub-pixel edge onto the substrate contains the orthographic projection of the metal lines onto the substrate.

[0164] In one exemplary embodiment, the area enclosed by the orthographic projection of the metal line on the substrate includes the orthographic projection of at least one sub-pixel on the substrate, and the orthographic projection of the sub-pixel edge on the substrate including the orthographic projection of the metal line on the substrate can ensure that the touch panel does not affect the display of the display panel.

[0165] In one exemplary embodiment, since the organic light-emitting layer emits light from the pixel opening area defined by the pixel definition layer, the pixel opening area is the light-emitting area P1, and the area outside the pixel opening is the non-light-emitting area P2, which is located around the light-emitting area P1. In this exemplary embodiment, each light-emitting area P1 is referred to as a subpixel, such as a red subpixel, a blue subpixel, or a green subpixel, and each non-light-emitting area P2 is referred to as a subpixel edge, such as the red-green subpixel edge between a red subpixel and a green subpixel, or the blue-green subpixel edge between a blue subpixel and a green subpixel. Thus, the light-emitting area of ​​the display panel includes a plurality of periodically arranged subpixels, and the non-light-emitting area of ​​the display structure layer includes the subpixel edges located between adjacent subpixels.

[0166] The touch panel is the same as the touch panel provided in any of the foregoing embodiments, and the implementation principle and effect are similar, so it will not be described again here.

[0167] Figure 17 This is a schematic diagram of the structure of a touch display panel provided as an exemplary embodiment. Figure 17 As shown, an exemplary embodiment provides a touch display panel that may further include a pad region located in a non-display area. The touch panel may include a first touch trace 102 connected to a first touch structure 101 and a second touch trace 202 connected to a second touch structure 201. The pad region includes a first pad electrode 103 and a second pad electrode 203. Each first touch structure is connected to the first pad electrode via the first touch trace, and each second touch structure is connected to the second pad electrode via the second touch trace.

[0168] In one exemplary embodiment, the display panel may further include a touch driver chip located in a non-display area. The touch driver chip may be located on the side of the pad area closer to the display area.

[0169] In one exemplary embodiment, the first touch structure is connected to the touch driver chip via a first pad electrode, and the second touch structure is connected to the touch driver chip via a second pad electrode.

[0170] This disclosure also provides a touch display device, including a touch display panel.

[0171] In one exemplary embodiment, the touch display device can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0172] The touch display panel is the same as the touch display panel provided in any of the foregoing embodiments. The implementation principle and effect are similar, and will not be described again here.

[0173] The accompanying drawings in this disclosure only relate to the structures involved in the embodiments of this disclosure; other structures can be referred to in general design.

[0174] For clarity, the thickness and dimensions of layers or microstructures are enlarged in the accompanying drawings used to describe embodiments of this disclosure. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” or “below” another element, the element may be located “directly” on or “below” the other element, or there may be intermediate elements present.

[0175] While the embodiments disclosed herein are as described above, the content is merely for the purpose of facilitating understanding of this disclosure and is not intended to limit this disclosure. Any person skilled in the art to which this disclosure pertains may make any modifications and changes to the form and details of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection of this disclosure shall still be determined by the scope defined in the appended claims.

Claims

1. A touch panel, comprising: Multiple first touch structures extending along a first direction and multiple second touch structures extending along a second direction, wherein the multiple first touch structures are arranged along the second direction and the multiple second touch structures are arranged along the first direction; The first touch structure includes: a plurality of first touch electrodes and a plurality of first connecting portions; the second touch structure includes: a plurality of second touch electrodes and a plurality of second connecting portions; the first direction and the second direction intersect; the first touch electrodes and the second touch electrodes are disposed in the same layer; the first connecting portion or the second connecting portion is disposed in the same layer as the first touch electrode. The touch panel further includes: at least one touch branch located at the edge of the touch electrode, the extension direction of each touch branch intersects the extension direction of the edge of the touch electrode where the touch branch is located, the extension direction of the touch branch is different from the first direction and the second direction, and the touch electrode includes: the first touch electrode and / or the second touch electrode; The length of the touch branch is greater than the length of the connecting portion disposed in the same layer as the first touch electrode along a third direction. The third direction is the same as the extension direction of a portion of the touch branch and intersects with the first direction and the second direction. The first touch electrode, the second touch electrode, the first connecting portion, the second connecting portion, and the touch branch all include: multiple grid patterns; wherein, the grid pattern is a polygon composed of metal wires; The first touch electrode is a planar electrode; or, The first touch electrode includes: a plurality of first electrodes extending along a fourth direction and a plurality of second electrodes extending along a fifth direction; both the first electrode and the second electrode include: a plurality of grid patterns, and a plurality of virtual regions are defined between the plurality of first electrodes and the plurality of second electrodes; The fourth direction and the fifth direction intersect, and both the fourth direction and the fifth direction are different from the first direction and the second direction.

2. The touch panel according to claim 1, wherein, The touch branch includes: a branch body and at least one protrusion located on the edge of the branch body. When the number of touch branches is at least two, the at least two touch branches are spaced apart from each other, and the at least two touch branches are located on both sides of the touch electrode.

3. The touch panel according to claim 2, wherein, The length of the branch body is greater than half the length of the touch electrode where the touch branch is located along the extension direction of the touch branch.

4. The touch panel according to claim 2, wherein, The branch body includes: a first side and a second side arranged opposite to each other, and a third side and a fourth side arranged opposite to each other; the third side is connected to the touch electrode where the touch branch is located; The at least one protrusion is located on the first side and the second side of the branch body.

5. The touch panel according to claim 4, wherein, The protrusion located on the first side of the branch body is staggered with the protrusion located on the second side of the branch body.

6. The touch panel according to claim 4, wherein, The width of the protrusion near the touch electrode where the touch branch is located is greater than the width of the protrusion away from the touch electrode where the touch branch is located.

7. The touch panel according to any one of claims 1 to 6, wherein, When the touch electrode includes a first touch electrode and a second touch electrode, the touch branch on the first touch electrode is a first touch branch, and the first touch branch includes a first branch body and at least one first protrusion located at the edge of the first branch body; the touch branch on the second touch electrode is a second touch branch, and the second touch branch includes a second branch body and at least one second protrusion located at the edge of the second branch body. When the number of the first touch branch and the number of the second touch branch are both at least two, at least two first touch branches are spaced apart from each other, and at least two second touch branches are spaced apart from each other; at least one first touch branch is located between adjacent second touch branches, and at least one second touch branch is located between adjacent first touch branches; The maximum spacing between adjacent first touch branches is greater than the maximum width of the second touch branch; The maximum spacing between adjacent second touch branches is greater than the maximum width of the first touch branch.

8. The touch panel according to claim 7, wherein, A first groove is formed between adjacent first touch branches, and the second touch branch is fitted into the first groove; A second groove is formed between adjacent second touch branches, and the first touch branch and the second groove are interlocked.

9. The touch panel according to claim 2, wherein, The shape of the branch body includes: rectangle; The shape of the protrusion includes: rectangle, triangle or wave.

10. The touch panel according to claim 2, wherein, The touch branch and the corresponding touch electrode are integrally formed.

11. The touch panel according to claim 1, comprising: The buffer layer, bridging layer, insulating layer, touch layer, and protective layer are stacked in sequence. The touch layer includes: a plurality of first touch electrodes, a plurality of first connecting portions, and a plurality of second touch electrodes; the plurality of first touch electrodes and the plurality of first connecting portions are alternately arranged and connected sequentially, and the plurality of second touch electrodes are spaced apart; The bridging layer includes: a plurality of second connection portions, each second connection portion including: two first connection structures symmetrically arranged with respect to a first axis of symmetry, each first connection structure including: a first pad portion and a first connection bridge; the first pad portion is configured to be connected to an adjacent second touch electrode through a via on the insulating layer, the first connection bridge is configured to connect the first pad portion, and the first axis of symmetry extends along a second direction.

12. The touch panel according to claim 11, wherein, The first connecting bridge is a closed-loop structure composed of multiple first connecting lines.

13. The touch panel according to claim 1, comprising: The buffer layer, bridging layer, insulating layer, touch layer, and protective layer are stacked in sequence. The touch layer includes: a plurality of second touch electrodes, a plurality of second connecting portions, and a plurality of first touch electrodes; the plurality of second touch electrodes and the plurality of second connecting portions are alternately arranged and connected sequentially, and the plurality of first touch electrodes are spaced apart; The bridging layer includes: a plurality of first connection portions, each first connection portion including: two second connection structures symmetrically arranged with respect to a second axis of symmetry, each second connection structure including: a second pad portion and a second connection bridge; the second pad portion is configured to be connected to an adjacent first touch electrode through a via on the insulating layer, the second connection bridge is configured to connect the second pad portion, and the second axis of symmetry extends along a first direction.

14. The touch panel according to claim 13, wherein, The second connecting bridge is a closed-loop structure composed of multiple second connecting lines.

15. The touch panel according to claim 11, wherein, Each of the first connecting parts includes: a first sub-connecting part, a first sub-connecting structure, and a second sub-connecting part; The first sub-connection portion and the second sub-connection portion are respectively located on the touch branches of the two first touch electrodes connected by the first connection portion, and the first sub-connection structure is located between the first sub-connection portion and the second sub-connection portion; The lengths of the first sub-connection portion along the third direction and the lengths of the second sub-connection portion along the third direction are both less than half the length of the first touch branch.

16. The touch panel according to claim 13, wherein, Each of the second connecting parts includes: The third sub-connecting part, the second sub-connecting structure and the fourth sub-connecting part are interconnected; The third sub-connection portion and the fourth sub-connection portion are respectively located on the touch branches of the two second touch electrodes connected by the second connection portion, and the second sub-connection structure is located between the third sub-connection portion and the fourth sub-connection portion; The length of the third sub-connecting portion along the third direction and the length of the fourth sub-connecting portion along the third direction are both less than half the length of the second touch branch.

17. The touch panel according to claim 1, wherein, When the first touch electrode includes a plurality of first electrodes extending along the fourth direction and a plurality of second electrodes extending along the fifth direction, the width of the first boundary electrode is smaller than the width of the first non-boundary electrode, and the width of the second boundary electrode is smaller than the width of the second non-boundary electrode. Wherein, the first boundary electrode is a first electrode close to the second touch electrode, and the second non-boundary electrode is a first electrode located on the side of the first boundary electrode away from the second touch electrode; the second boundary electrode is a second electrode close to the second touch electrode, and the second non-boundary electrode is a second electrode located on the side of the second boundary electrode away from the second touch electrode.

18. The touch panel according to claim 1, wherein, The first electrode and the second electrode forming the virtual region are respectively provided with a first branch segment and a second branch segment; The first branch segment and the second branch segment located within the same virtual area are spaced apart from each other or connected to each other; The shapes of the first branch segment and the second branch segment include: cross-shaped or square.

19. The touch panel according to claim 18, wherein, Both the first branch segment and the second branch segment include multiple grid patterns.

20. The touch panel according to claim 1, wherein, The second touch electrode is a planar electrode; or, The second touch electrode includes: a plurality of third electrodes extending along a fifth direction and a plurality of fourth electrodes extending along a fourth direction; each of the third electrodes and the fourth electrodes includes: a plurality of grid patterns, and a plurality of virtual regions are defined between the plurality of third electrodes and the plurality of fourth electrodes; The fourth direction and the fifth direction intersect, and both the fourth direction and the fifth direction are different from the first direction and the second direction.

21. The touch panel according to claim 20, wherein, When the second touch electrode includes: a plurality of third electrodes extending along the fifth direction and a plurality of fourth electrodes extending along the fourth direction, the width of the third boundary electrode is smaller than the width of the third non-boundary electrode, and the width of the fourth boundary electrode is smaller than the width of the fourth non-boundary electrode. Wherein, the third boundary electrode is a third electrode close to the first touch electrode, and the third non-boundary electrode is a third electrode located on the side of the third boundary electrode away from the first touch electrode; the fourth boundary electrode is a fourth electrode close to the first touch electrode, and the fourth non-boundary electrode is a fourth electrode located on the side of the fourth boundary electrode away from the first touch electrode.

22. The touch panel according to claim 21, wherein, The third electrode and the fourth electrode forming the virtual region are respectively provided with a third branch segment and a fourth branch segment; The third branch segment and the fourth branch segment located within the same virtual area are spaced apart from each other or connected to each other; Both the third branch segment and the fourth branch segment include multiple grid patterns; The shapes of the third branch segment and the fourth branch segment include: cross-shaped or square.

23. The touch panel according to any one of claims 17 to 22, further comprising: A metal structure disposed in the same layer as the touch electrode; The metal structure is located within the virtual area, and the metal structure includes multiple grid patterns.

24. A touch display panel, comprising: The display panel and the touch panel as described in any one of claims 1 to 23; The touch panel is located on the light-emitting side of the display panel or on the backlight side opposite to the light-emitting side; The display panel includes a substrate, the substrate including: a light-emitting area and a non-light-emitting area, the light-emitting area including a plurality of periodically arranged sub-pixels, and the non-light-emitting area including sub-pixel edges located between adjacent sub-pixels; The touch panel includes multiple metal grids composed of metal wires; The region enclosed by the orthographic projection of the metal line onto the substrate includes the orthographic projection of at least one sub-pixel onto the substrate, and the orthographic projection of the sub-pixel edge onto the substrate includes the orthographic projection of the metal line onto the substrate.

25. A touch display device, comprising: The touch display panel as described in claim 24.

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