Touch substrate and touch panel

Abstract

The application provides a touch substrate and a touch panel, and relates to the technical field of touch control. The touch substrate comprises a plurality of first electrodes and second electrodes arranged side by side on a substrate, and the two form a touch unit at the intersection. In at least one touch unit, the first electrode comprises a first auxiliary electrode, at least two first sub-electrodes and at least one first connecting part, and the adjacent first sub-electrodes are connected through the first connecting part. The second electrode comprises at least two second sub-electrodes and at least one second connecting part, and the adjacent second sub-electrodes are connected through the second connecting part. The first connecting part and the second connecting part intersect and are spaced from each other, and the first auxiliary electrode is connected with the first sub-electrode. The orthographic projection of the first auxiliary electrode on the substrate surrounds the orthographic projection of the first connecting part and the second connecting part on the substrate. In this way, the problem that the bridge point formed by the first connecting part and the second connecting part in the touch unit is electrostatically broken down is reduced.

Description

Technical Field

[0001] This application relates to the field of touch technology, specifically to a touch substrate and a touch panel having the touch substrate. Background Technology

[0002] Currently, touch panels (TPs) can be categorized by their sensing principles into resistive, capacitive, surface acoustic wave (SAW), and infrared types. Based on their structural relationship with the display screen, touch panels can be classified into one-glass solution (OGS) touch panels, on-cell touch panels, and in-cell touch panels. With the expansion of touch panel applications and the increasing prevalence of large-size touch panels, the problem of electrostatic discharge (ESD) affecting touch panels is becoming increasingly prominent.

[0003] Therefore, there is an urgent need to provide a new solution to improve the impact of static electricity on touch panels. Summary of the Invention

[0004] A first aspect of this application provides a touch substrate, the touch substrate including a plurality of first electrodes extending along a first direction and a plurality of second electrodes extending along a second direction on a substrate, the first electrodes and the second electrodes forming a touch unit at their intersection. In at least one touch unit, the first electrode includes a first auxiliary electrode, at least two first sub-electrodes and at least one first connecting portion, adjacent first sub-electrodes being connected through the first connecting portion; the second electrode includes at least two second sub-electrodes and at least one second connecting portion, adjacent second sub-electrodes being connected through the second connecting portion, the first connecting portion and the second connecting portion intersecting and spaced apart from each other, and the first auxiliary electrode is connected to the first sub-electrodes, the orthographic projection of the first auxiliary electrode on the substrate surrounding the orthographic projection of the first connecting portion and the second connecting portion on the substrate.

[0005] In the above solution, the first connecting part and the second connecting part are intersecting and spaced apart in the same touch unit, forming a bridge point in the area where they intersect. Since static charge easily accumulates at this bridge point, there is a risk of electrostatic discharge (ESD) damage. By providing a first auxiliary electrode structure connected to the first sub-electrode, the first auxiliary electrode can disperse the static charge on the corresponding bridge point, thereby reducing the risk of ESD damage to the bridge point.

[0006] In conjunction with the first aspect, in some embodiments, in a touch unit provided with a first auxiliary electrode, each first sub-electrode is connected to the first auxiliary electrode.

[0007] In the above scheme, the design of connecting the first auxiliary electrode with all the first sub-electrodes included in the corresponding first electrode increases the communication path between the first auxiliary electrode and its corresponding bridge point, which can more effectively reduce the risk of the bridge point being damaged by electrostatic discharge.

[0008] In conjunction with the first aspect, in some embodiments, in a touch unit provided with a first auxiliary electrode, the orthographic projection of the first auxiliary electrode on the substrate overlaps with the orthographic projections of the first sub-electrode and the second sub-electrode on the substrate, and the first sub-electrode and the first auxiliary electrode are on different layers.

[0009] In the above scheme, the area occupied by the first auxiliary electrode in the touch unit is smaller than the area occupied by the first sub-electrode and the second sub-electrode in the touch unit. This design allows the newly added first auxiliary electrode to improve the quality of the touch substrate without increasing the surface area of ​​each touch unit in the touch substrate, which is more conducive to the integration of the touch structure.

[0010] In conjunction with the first aspect, in some embodiments, in a touch unit provided with a first auxiliary electrode, the orthographic projections of the first sub-electrode and the second sub-electrode on the substrate fall within the orthographic projection of the first auxiliary electrode on the substrate.

[0011] In the above scheme, the first auxiliary electrode is arranged to surround the first electrode and the second electrode in the touch unit. This makes the first auxiliary electrode have a relatively large circumference, which is more conducive to the transfer of static charge accumulated on the bridge point, so that there is little or no static charge on the bridge point. This can effectively reduce the risk of being damaged by static charge at the bridge point.

[0012] In conjunction with the first aspect, in some embodiments, in a touch unit provided with a first auxiliary electrode, the second electrode further includes a second auxiliary electrode, the second auxiliary electrode is connected to a second sub-electrode, and the orthographic projection of the second auxiliary electrode on the substrate surrounds the orthographic projection of the first connecting portion and the second connecting portion on the substrate.

[0013] In the above scheme, in the same touch unit, in addition to the first auxiliary electrode corresponding to the first sub-electrode, the second auxiliary electrode is also provided. This adds another channel for dispersing static charge at the bridge point, thereby more effectively reducing the risk of the bridge point being broken down by static charge.

[0014] In conjunction with the first aspect, in some embodiments, in a touch unit provided with a second auxiliary electrode, each second sub-electrode is connected to the second auxiliary electrode.

[0015] In the above scheme, all the second sub-electrodes of the second electrode in the touch unit are connected to the second auxiliary electrode, which increases the number of branches for static charge flow and is beneficial to the dispersion and transfer of static charge on the bridge point.

[0016] In conjunction with the first aspect, in some embodiments, in a touch unit provided with a first auxiliary electrode and a second auxiliary electrode, the orthographic projection of the second auxiliary electrode on the substrate overlaps with the orthographic projections of the first sub-electrode and the second sub-electrode on the substrate, and the second sub-electrode and the second auxiliary electrode are on different layers.

[0017] In the above scheme, the design of the second auxiliary electrode not only disperses the static charge at the bridge point, but also does not affect the size of the touch unit. In addition, it forms new capacitances with the corresponding first and second sub-electrodes, thereby improving the touch sensitivity.

[0018] In conjunction with the first aspect, in some embodiments, in a touch unit provided with a first auxiliary electrode and a second auxiliary electrode, the orthographic projections of the first sub-electrode and the second sub-electrode on the substrate are located within the orthographic projection of the second auxiliary electrode on the substrate.

[0019] In the above scheme, the setting of the projection relationship between the second auxiliary electrode and the first and second sub-electrodes maximizes the ability of the second auxiliary electrode to receive static charge while reducing the impact on the area of ​​the touch unit.

[0020] In conjunction with the first aspect, in some embodiments, the first sub-electrode and the second sub-electrode are on the same layer, one of the first connecting portion and the second connecting portion is on the same layer as the first sub-electrode, and the other is configured as a conductive bridge.

[0021] In conjunction with the first aspect, in some embodiments, one of the first auxiliary electrode and the second auxiliary electrode is on the same layer as the first sub-electrode, and the other is on the same layer as the conductive bridge. Further, the orthographic projections of the first auxiliary electrode and the second auxiliary electrode on the substrate coincide. Further, the first auxiliary electrode and / or the second auxiliary electrode are grounded.

[0022] In the above scheme, the connection between the first auxiliary electrode and the first sub-electrode and the connection between the second auxiliary electrode and the second sub-electrode can be achieved without adding film structure and mask process to the first auxiliary electrode and the second sub-electrode.

[0023] In conjunction with the first aspect, in some embodiments, the first auxiliary electrode and the second auxiliary electrode are on the same layer as the first sub-electrode or connected to a conductive bridge, and the orthographic projection of the first auxiliary electrode on the substrate lies within the orthographic projection of the second auxiliary electrode on the substrate. Further, the first auxiliary electrode and / or the second auxiliary electrode are grounded.

[0024] In the above scheme, the connection method between the first auxiliary electrode and the second auxiliary electrode and the first sub-electrode and the second sub-electrode can be set with reference to the first connecting part or conductive bridge. This will not increase the film structure of the touch unit or the mask process during manufacturing. In addition, the grounding design scheme for different auxiliary electrodes can more effectively improve the electrostatic discharge capability of the corresponding auxiliary electrodes.

[0025] This application provides a touch panel, characterized in that the touch panel includes a touch substrate according to any one of the first aspects described above. Further, the substrate is a display substrate. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below.

[0027] Figure 1 This is a plan view of the touch substrate in one embodiment of this application. 。

[0028] Figure 2 This is an enlarged view of the touch substrate S1 in one embodiment of this application.

[0029] Figure 3 This is a planar schematic diagram of the first electrode of the touch substrate in one embodiment of this application.

[0030] Figure 4 This is a planar schematic diagram of the second electrode of the touch substrate in one embodiment of this application.

[0031] Figure 5 This is a plan view of a touch unit in one embodiment of this application.

[0032] Figure 6 yes Figure 5 The diagram shows a cross-sectional view of the touch unit along M1N1.

[0033] Figure 7 yes Figure 5 The diagram shows a cross-sectional view of the touch unit along M2N2.

[0034] Figure 8 This is a plan view of a touch unit in another embodiment of this application.

[0035] Figure 9 yes Figure 8 The diagram shows a cross-sectional view of the touch unit along M1N1.

[0036] Figure 10 yes Figure 8 The diagram shows a cross-sectional view of the touch unit along M2N2.

[0037] Figure 11 This is a plan view of a touch unit in one embodiment of this application.

[0038] Figure 12 yes Figure 11 The diagram shows a cross-sectional view of the touch unit along M1N1.

[0039] Figure 13 This is a plan view of a touch unit in another embodiment of this application.

[0040] Figure 14 yes Figure 13 The diagram shows a cross-sectional view of the touch unit along M1N1.

[0041] Figure 15 This is a plan view of a touch unit in another embodiment of this application.

[0042] Figure 16 yes Figure 15 The diagram shows a cross-sectional view of the touch unit along M1N1.

[0043] Figure 17 yes Figure 15 The diagram shows a cross-sectional view of the touch unit along M2N2.

[0044] Figure 18 This is a plan view of a touch unit in another embodiment of this application.

[0045] Figure 19 yes Figure 18 The diagram shows a cross-sectional view of the touch unit along M1N1. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] Currently, most flexible display panels use on-cell touch panels (TPs), where one of the two connection points between the touch electrodes is connected by a conductive bridge, and the area where the two connection points intersect is called the bridge point. During the panel manufacturing process, a protective film is applied to the side of the touch panel facing away from the display module. This protective film needs to be removed before attaching the polarizer to the display module. Static electricity generated during the film removal process tends to accumulate more easily in the area corresponding to the bridge point. Furthermore, because the capacitance formed at the bridge point is relatively small, the film layer in this area is easily damaged or even broken down by electrostatic discharge, leading to TP malfunction. Existing technologies have attempted to improve this problem by optimizing the film removal process, such as adjusting the film removal speed, but the effect is not significant and it also affects production capacity. Therefore, this application provides a touch substrate with an improved structure at the bridge point, which can mitigate damage caused by static electricity accumulation at the bridge point.

[0048] This application provides a touch substrate comprising a plurality of first electrodes extending along a first direction and a plurality of second electrodes extending along a second direction on a substrate. The first electrodes and second electrodes form a touch unit at their intersection. In at least one touch unit, the first electrode includes a first auxiliary electrode, at least two first sub-electrodes, and at least one first connecting portion, with adjacent first sub-electrodes connected by the first connecting portion; the second electrode includes at least two second sub-electrodes and at least one second connecting portion, with adjacent second sub-electrodes connected by the second connecting portion, the first connecting portion and the second connecting portion intersecting and spaced apart from each other, and the first auxiliary electrode being connected to the first sub-electrodes. The orthographic projection of the first auxiliary electrode on the substrate surrounds the orthographic projections of the first connecting portion and the second connecting portion on the substrate. In the same touch unit, the first connecting portion and the second connecting portion intersect and are spaced apart from each other, forming a bridge point in the area where they intersect. Since static charge easily accumulates at this bridge point, there is a risk of electrostatic discharge (ESD) damage at this bridge point. By setting a first auxiliary electrode connected to the first sub-electrode and arranging it around the corresponding bridge point, the first auxiliary electrode forms a channel connecting the corresponding bridge point, thereby dispersing the static charge on the corresponding bridge point and reducing the risk of the bridge point being damaged by electrostatic discharge.

[0049] The structure of a touch substrate according to at least one embodiment of this application will now be described with reference to the accompanying drawings. Furthermore, in these embodiments, a spatial Cartesian coordinate system is established with the surface of the touch substrate (or its included substrate) as a reference, to more clearly illustrate the positional relationships of the various structures within the touch substrate in the accompanying drawings. In this spatial Cartesian coordinate system, the X and Y axes are parallel to the surface of the touch substrate, and the Z axis is perpendicular to the surface of the touch substrate.

[0050] For example, such as Figure 1As shown, in at least one embodiment of this disclosure, the planar area of ​​the touch substrate 10 can be divided into a touch area 11 and a border area 12 surrounding the touch area 11. The touch area 11 is used to arrange touch electrodes to realize touch function, and the border area 12 is used to arrange wiring and circuit transitions (e.g., touch signal wiring). Figures 2 to 6 As shown, the touch substrate includes a substrate 100, multiple first electrodes 200 arranged side-by-side along a first direction (X-axis) and multiple second electrodes 300 arranged side-by-side along a second direction (Y-axis) on the substrate 100. The first and second directions are perpendicular, and the first electrodes 200 and second electrodes 300 form multiple touch units 400 at their intersections. Figure 5 As shown, in each touch unit 400, the first electrode 200 includes two adjacent first sub-electrodes 210 and a first auxiliary electrode 220 connected to the first sub-electrodes 210. The two adjacent first sub-electrodes 210 are connected by a first connecting portion 500. In each touch unit 400, the second electrode 300 includes two adjacent second sub-electrodes 310, which are connected by a second connecting portion 600. In the same touch unit 400, the first connecting portion 500 and the second connecting portion 600 intersect and are spaced apart from each other. The orthographic projection of the first auxiliary electrode 220 on the substrate is a closed loop, and the orthographic projections of the first connecting portion 500 and the second connecting portion 600 on the substrate are located within the closed loop.

[0051] It should be understood that, in the embodiments of this disclosure, the first electrode and the second electrode only need to cross each other to form a touch capacitor (touch unit) at the intersection; that is, the positional relationship between the first electrode and the second electrode is not limited to the following. Figures 1 to 3 The vertical relationship shown is not limited to the closed ring shape of the first auxiliary electrode projected onto the substrate. Other shapes are also possible, such as a ring with at least one opening. These can be designed according to actual needs and will not be elaborated here.

[0052] Before introducing the specific connection method between the first auxiliary electrode and the first sub-electrode, we first describe the connection between the first sub-electrode and the second sub-electrode in the touch substrate to realize the touch function of the touch substrate. In at least one embodiment of this application, the first sub-electrode and the second sub-electrode are on the same layer, one of the first connecting portion and the second connecting portion is on the same layer as the first sub-electrode, and the other is set as a conductive bridge.

[0053] For example, such as Figures 3 to 7As shown, the first electrode 200 can be a driving electrode for receiving driving signals, and the second electrode 300 can be a sensing electrode for receiving sensing signals. In each touch unit 400, the first electrode 200 and the second electrode 300 are on the same layer, that is, multiple first sub-electrodes 210 and multiple second sub-electrodes 310 are on the same layer. The first connecting portion 500 is on the same layer as the first sub-electrodes 210, and the second connecting portion 600 is on a different layer from the first sub-electrodes 210 and the second sub-electrodes 310. It is configured as a conductive bridge structure. Specifically, an insulating layer 700 is provided on the side of the film layer where the second sub-electrodes 310 are located away from the substrate. The second connecting portion 600 is disposed on the side of the insulating layer 700 away from the second sub-electrodes 310, and is connected to the corresponding two second sub-electrodes 310 through a via on the insulating layer 700.

[0054] Based on the design that the first electrode includes a first auxiliary electrode, the design of the first auxiliary electrode in the product structure of the touch substrate will be further defined.

[0055] In some embodiments, in a touch unit provided with a first auxiliary electrode, each first sub-electrode is connected to the first auxiliary electrode. The design of connecting the first auxiliary electrode to all the first sub-electrodes increases the pathway between the first auxiliary electrode and its corresponding bridge point, thereby facilitating the transfer of static charge accumulated on the bridge point to the first auxiliary electrode and thus more effectively reducing the risk of electrostatic discharge to the bridge point.

[0056] For example, such as Figure 5 , Figure 6 and Figure 7 As shown, the first auxiliary electrode 220 in the first electrode 200 is connected to both of its two first sub-electrodes 210. Based on the shape of the first sub-electrodes 210, multiple first connecting wires 230 are provided to connect the first auxiliary electrode 220 to the endpoints of the first sub-electrodes 210 that are not connected to the first connecting portion 500. That is, the corresponding first sub-electrodes 210 have a rectangular structure, wherein the vertices of the two adjacent rectangles corresponding to two adjacent first sub-electrodes 210 are connected to the first connecting portion 500, and the remaining three vertices, or points near the corresponding vertices, can be connected to the first sub-auxiliary electrode through the first connecting wires 230 respectively. Furthermore, the diameter of each first connecting wire 230 is smaller than the diameter of the first connecting portion 500, which is more conducive to the transfer of charge from the first connecting portion 500 to the first connecting wire 230 and thus to the first auxiliary electrode 220.

[0057] It should be understood that the connection method between the first sub-electrode and the first auxiliary electrode is not limited to the scheme in the above example. One or more first connecting wires can be provided, and the thickness and shape of the first connecting wires are not limited to the above settings; their shape can be wavy, polygonal, etc. Furthermore, the point near the corresponding vertex mentioned above refers to the point on the side of the rectangle formed by the first sub-electrode that moves relative to the corresponding vertex of the rectangle, so that the first electrode is connected to the first auxiliary electrode through the first connecting wire without affecting other structures of the touch panel, such as pixel arrangement. All of these can be designed according to the functional requirements and manufacturing process of the touch substrate, and will not be elaborated upon here.

[0058] In addition to defining the relationship between the first auxiliary electrode and the first sub-electrode in the first electrode, this embodiment also defines the relationship between the first auxiliary electrode and the bridge point, that is, between the first connection portion and the second connection portion, so that the design of the first auxiliary electrode can meet the different requirements of the touch substrate.

[0059] In some embodiments, in a touch unit with a first auxiliary electrode, the orthographic projections of the first sub-electrode and the second sub-electrode on the substrate fall within the orthographic projection of the first auxiliary electrode on the substrate. The first auxiliary electrode is configured to surround the first and second electrodes in the touch unit, thus giving it a relatively large perimeter. This reduces the impact on the surface area of ​​the touch unit while maximizing the length of the connection channel between the first auxiliary electrode and the corresponding bridge point. This facilitates the transfer and dispersion of static charge accumulated on the bridge point, resulting in minimal or no static charge on the bridge point. This effectively reduces the risk of the film layer in the area corresponding to the bridge point being damaged by static charge.

[0060] For example, such as Figure 5 As shown, in a touch unit 400, the traces of the first auxiliary electrode 220 form a rectangular frame. This rectangular frame not only encloses the first connection portion 500 and the second connection portion 600, but also encloses two adjacent first sub-electrodes 210 and two adjacent second sub-electrodes 310.

[0061] In other embodiments, in the touch unit with the first auxiliary electrode, the orthographic projection of the first auxiliary electrode onto the substrate overlaps with the orthographic projections of the first sub-electrode and the second sub-electrode onto the substrate, and the first sub-electrode and the first auxiliary electrode are on different layers. The design of the first auxiliary electrode occupying a smaller area in the touch unit than the first and second sub-electrodes allows the addition of the first auxiliary electrode to improve the quality of the touch substrate without increasing the surface area of ​​each touch unit, thus facilitating the integration of the touch structure. Furthermore, the spatial overlap between the first auxiliary electrode and the first and second sub-electrodes forms a new capacitor, which helps to homogenize the capacitance in the touch unit, thereby improving the sensitivity of the touch function of the touch substrate.

[0062] For example, such as Figure 8 , Figure 9 and Figure 10 As shown, in a touch unit 400, the first auxiliary electrode 220 is on a different layer from the first sub-electrode 210 and the second sub-electrode 310. It is disposed on the side of the insulating layer 700 away from the substrate, and the traces of the first auxiliary electrode 220 form a rectangular frame. The rectangular frame encloses the first connection portion 500 and the second connection portion 600 within the frame, and there is spatial overlap between it and all the first sub-electrodes 210 and all the second sub-electrodes 310 in the first touch unit 400.

[0063] Based on the inventive concept of setting a first auxiliary electrode in a first electrode on a touch substrate, this application embodiment further proposes a scheme of setting a second auxiliary electrode in a second electrode on the touch substrate, and the corresponding specific implementation is as follows.

[0064] In some embodiments, in a touch unit with a first auxiliary electrode, the second electrode further includes a second auxiliary electrode connected to a second sub-electrode. The orthographic projection of the second auxiliary electrode onto the substrate is a closed loop, and the orthographic projections of the first connecting portion and the second connecting portion onto the substrate fall within this closed loop. In the same touch unit, in addition to the first auxiliary electrode corresponding to the first sub-electrode, the second sub-electrode also has a corresponding second auxiliary electrode. This adds another channel for dispersing static charge at the bridge point, allowing the static charge at the bridge point to be transferred away more quickly and effectively, thereby reducing the risk of the bridge point being damaged by static charge.

[0065] In at least some embodiments, in a touch unit provided with a second auxiliary electrode, each second sub-electrode is connected to the second auxiliary electrode. All the second sub-electrodes of the second electrode in the touch unit are connected to the second auxiliary electrode, increasing the number of branches for static charge flow and facilitating the dispersion and transfer of static charge at the bridge point.

[0066] For example, such as Figure 11 , Figure 12 and Figure 13 As shown, in this touch unit 400, not only does the first electrode 200, which serves as the driving electrode, include a first auxiliary electrode 220 connected to two adjacent first sub-electrodes 210, but the second electrode 300, which serves as the sensing electrode, also includes a second auxiliary electrode 320. This second auxiliary electrode 320 is connected to two adjacent second sub-electrodes 310, i.e., all the second sub-electrodes 310 in the touch unit 400. The traces of the second auxiliary electrode 320 form a closed rectangular frame, and the first connection portion 500 and the second connection portion 600 in the touch unit 400 are spatially located within this rectangular frame. Furthermore, the second auxiliary electrode 320 and the second sub-electrodes 310 are connected by multiple second connecting wires 330. In addition to the two endpoints of adjacent second sub-electrodes 310 used to connect the second connecting portion 600 to achieve the connection, the remaining endpoints, or points on the second electrode close to the remaining endpoints, are all connected to the second auxiliary electrode 320 via the second connecting wires 330.

[0067] Based on the above design of the first auxiliary electrode relative to the touch electrodes (first sub-electrode and second sub-electrode) in the touch unit, this embodiment also makes a similar design for the second auxiliary electrode, and combines it with the design scheme of the first auxiliary electrode to form more exemplary schemes, which are described in detail below.

[0068] In some embodiments, in a touch unit provided with a first auxiliary electrode and a second auxiliary electrode, the orthographic projections of the first sub-electrode and the second sub-electrode onto the substrate lie within the orthographic projection of the second auxiliary electrode onto the substrate. Setting the projection relationship between the second auxiliary electrode and the first and second sub-electrodes maximizes the ability of the second auxiliary electrode to receive electrostatic charge while minimizing its impact on the area of ​​the touch unit.

[0069] For example, such as Figure 11 and Figure 12As shown, in the touch unit 400, the traces of the first auxiliary electrode 220 corresponding to the first electrode 200 form a rectangular frame. Spatially, this rectangular frame encloses all the first sub-electrodes 210 and all the second sub-electrodes 310, and also encloses the first connecting portion 500 and the second connecting portion 600. Furthermore, the second auxiliary electrode 320 corresponding to the second sub-electrode 310 also forms a rectangular frame. This rectangular frame also spatially encloses all the first sub-electrodes 210, the first connecting portion 500, and all the second sub-electrodes 310 and the second connecting portion 600, and also encloses the first auxiliary electrode 220 within this rectangular frame. That is, when the shapes of the first auxiliary electrode 220 and the second auxiliary electrode 320 are the same, the perimeter of the first auxiliary electrode 220 is smaller than the perimeter of the second auxiliary electrode 320.

[0070] For example, such as Figure 13 and Figure 14 As shown, in this touch unit 400, the first auxiliary electrode 220 corresponding to the first electrode 200 is on a different layer than the first sub-electrode 210. The first auxiliary electrode 220 is on the same layer as the second connection portion 600, i.e., the conductive bridge. The rectangular frame formed by its traces spatially encloses the first connection portion 500 and the second connection portion 600, and the traces of the first auxiliary electrode 220 spatially overlap with all the first sub-electrodes 210 and all the second sub-electrodes 310. In addition, the second auxiliary electrode 320 corresponding to the second sub-electrode 310 also forms a rectangular frame, which spatially encloses all the first sub-electrodes 210, all the second sub-electrodes 310, the first connection portion 500, the second connection portion 600, and the first auxiliary electrode 220.

[0071] In other embodiments, in a touch unit provided with a first auxiliary electrode and a second auxiliary electrode, the orthographic projection of the second auxiliary electrode onto the substrate overlaps with the orthographic projections of the first sub-electrode and the second sub-electrode onto the substrate, and the second sub-electrode and the second auxiliary electrode are on different layers. The design of the second auxiliary electrode serves to disperse static charge at the bridge point without affecting the size of the touch unit.

[0072] For example, such as Figure 15 , Figure 16 and Figure 17As shown, in this touch unit 400, the first auxiliary electrode 220 corresponding to the first electrode 200 is on a different layer than the first sub-electrode 210. The rectangular frame formed by their traces spatially encloses the first connection portion 500 and the second connection portion 600, and the traces of the first auxiliary electrode 220 spatially overlap with all the first sub-electrodes 210 and all the second sub-electrodes 310. Furthermore, the second auxiliary electrode 320 corresponding to the second sub-electrode 310 is on a different layer than the second sub-electrode 310, and its traces also form a rectangular frame. This rectangular frame spatially encloses the first connection portion 500, the second connection portion 600, and the first auxiliary electrode 220, and all the first sub-electrodes 210 and all the second sub-electrodes 310 spatially overlap.

[0073] In addition, similar to the above, Figure 13 and Figure 14 The scheme shown can also be configured such that the orthographic projection of the second auxiliary electrode on the substrate partially overlaps with the orthographic projections of all the first sub-electrodes and all the second sub-electrodes on the substrate, while the orthographic projection of the first auxiliary electrode on the substrate encircles the orthographic projections of all the first sub-electrodes and all the second sub-electrodes on the substrate. This scheme will not be elaborated here.

[0074] Considering the processing cost of the touch substrate, this embodiment further designs the relative film positions of the first auxiliary electrode and the second auxiliary electrode in the touch substrate, as follows.

[0075] In some embodiments, one of the first auxiliary electrode and the second auxiliary electrode is co-layered with the first sub-electrode, and the other is co-layered with the conductive bridge. In at least one embodiment, the orthographic projections of the first auxiliary electrode and the second auxiliary electrode on the substrate coincide. It should be noted that, to avoid short circuits, when the orthographic projections of the first auxiliary electrode and the second auxiliary electrode on the substrate coincide, they cannot be disposed on the same layer. Regarding the arrangement of the first auxiliary electrode and the second auxiliary electrode with the first sub-electrode layer and the conductive layer, the connection between the first auxiliary electrode and the first sub-electrode, and the connection between the second auxiliary electrode and the second sub-electrode, can be achieved without adding film layer structures and mask processes. In at least one embodiment, the first auxiliary electrode and / or the second auxiliary electrode is grounded.

[0076] For example, such as Figure 18 and Figure 19As shown, the first auxiliary electrode 220 is layered with the first sub-electrode 210 and the second sub-electrode 310, and the second auxiliary electrode 320 is layered with the second connection portion 600, i.e., the conductive bridge. Specifically, an insulating layer 700 is provided on the side of the film layer containing the first auxiliary electrode 220 away from the substrate, and the second auxiliary electrode 320 is disposed on the side of the insulating layer 700 away from the first auxiliary electrode 220. Furthermore, the traces of the first auxiliary electrode 220 and the second auxiliary electrode 320 encircle all the first sub-electrodes 210 and the second sub-electrodes 310, and their trace paths overlap, meaning the first auxiliary electrode 220 and the second auxiliary electrode 320 are completely spatially overlapped. In addition, in cases with high electrostatic charge, the first auxiliary electrode 220 and / or the second auxiliary electrode 320 can be grounded to efficiently discharge the electrostatic charge. Furthermore, in cases with high electrostatic charge, in addition to grounding, an ESD protection circuit can be added, connected to the touch leads in the touch panel, thereby reducing the impact of electrostatic discharge on the bridge point.

[0077] In other embodiments, the first auxiliary electrode, the second auxiliary electrode, and the first sub-electrode or conductive bridge are on the same layer, and the orthographic projection of the first auxiliary electrode on the substrate lies within the orthographic projection of the second auxiliary electrode on the substrate. The connection method between the first auxiliary electrode and the second auxiliary electrode and the corresponding connection method between the first sub-electrode and the second sub-electrode can refer to the connection method between the first sub-electrodes, such as direct wire connection or bridge connection. This does not increase the film layer structure of the touch unit or the mask process during manufacturing. Furthermore, in at least one embodiment, the first auxiliary electrode and / or the second auxiliary electrode are grounded. This further improves the impact of static electricity on the touch panel.

[0078] For example, such as Figure 11 and Figure 12 As shown, the first auxiliary electrode 220 and the second auxiliary electrode 320 are on the same layer as the first sub-electrode 210 and the second sub-electrode 310, and the second connecting wire 330 connecting the second auxiliary electrode 320 and the second sub-electrode 310 is configured as a bridge structure. Furthermore, as shown... Figure 15 , Figure 16 and Figure 17 As shown, the first auxiliary electrode 220 and the second auxiliary electrode 320 are on the same layer as the corresponding second connection portion 600, i.e., the conductive bridge structure, and are respectively connected to the first sub-electrode 210 and the second sub-electrode 310 through the conductive bridge structure. In addition, when there is a large amount of static charge, the first auxiliary electrode 220 and / or the second auxiliary electrode 320 can be grounded to efficiently discharge the static charge.

[0079] It should be understood that the first electrode in the above example can be either a sensing electrode or a driving electrode, and the number of first sub-electrodes and second sub-electrodes in each touch unit is not limited to the two in the example above; there can be more. Furthermore, the routing of the first and second auxiliary electrodes is not limited to the straight lines shown in the example diagram; it can also be a broken line or a curve. The connecting wires between each auxiliary electrode and its corresponding sub-electrode can also be broken lines or curves. In addition, the connection between each touch unit can be via wires or a conductive bridge structure, which needs to be designed considering the film layer structure where the first and / or second auxiliary electrodes are located. Besides being located on the same layer as the second connection portion (conductive bridge structure) or the first sub-electrode, the first and second auxiliary electrodes can also be located in other film layer positions, such as on the side of the first sub-electrode facing the substrate. All of these can be selected and designed according to the functional requirements of the touch substrate, and will not be elaborated further here.

[0080] This application provides a touch panel, characterized in that the touch panel includes a touch substrate according to any one of the first aspects described above. Further, the substrate is a display substrate.

[0081] In at least one embodiment, the touch panel further includes a touch sensor, a touch chip, and a flexible circuit board for implementing touch control. To achieve a thinner and lighter touch panel, the touch sensor is disposed in the encapsulation layer of the display substrate, the touch chip is disposed on the flexible circuit board, and signals are transmitted to the touch sensor through touch signal lines.

[0082] In at least one embodiment, the touch panel can be any product or component with display and touch functions, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator. Implementations of this display panel can refer to the embodiments of the array substrate described above; repeated details will not be repeated.

[0083] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A touch substrate, characterized in that, The device includes a plurality of first electrodes extending along a first direction and a plurality of second electrodes extending along a second direction on a substrate, wherein the first electrodes and the second electrodes form a touch unit at their intersection, and in at least one of the touch units... The first electrode includes a first auxiliary electrode, at least two first sub-electrodes, and at least one first connecting portion, with adjacent first sub-electrodes connected by the first connecting portion. The second electrode includes at least two second sub-electrodes and at least one second connecting portion, adjacent second sub-electrodes are connected by the second connecting portion, the first connecting portion and the second connecting portion intersect and are spaced apart from each other, and The first auxiliary electrode is connected to the first sub-electrode, and the orthographic projection of the first auxiliary electrode on the substrate surrounds the orthographic projections of the first connecting portion and the second connecting portion on the substrate; In the touch unit equipped with the first auxiliary electrode, The second electrode further includes a second auxiliary electrode, which is connected to the second sub-electrode. The orthographic projection of the second auxiliary electrode on the substrate surrounds the orthographic projections of the first connecting portion and the second connecting portion on the substrate; The first sub-electrode and the second sub-electrode are on the same layer, and one of the first connecting portion and the second connecting portion is on the same layer as the first sub-electrode, while the other is configured as a conductive bridge; One of the first auxiliary electrode and the second auxiliary electrode is in the same layer as the first sub-electrode, and the other is in the same layer as the conductive bridge; The first auxiliary electrode and / or the second auxiliary electrode are grounded; The orthographic projection of the second auxiliary electrode on the substrate is a closed ring, and the orthographic projections of the first connecting portion and the second connecting portion on the substrate fall within the closed ring.

2. The touch substrate according to claim 1, characterized in that, In the touch unit where the first auxiliary electrode is provided, each of the first sub-electrodes is connected to the first auxiliary electrode.

3. The touch substrate according to claim 1, characterized in that, In the touch unit provided with the first auxiliary electrode, the orthographic projection of the first auxiliary electrode on the substrate overlaps with the orthographic projections of the first sub-electrode and the second sub-electrode on the substrate, and the first sub-electrode and the first auxiliary electrode are on different layers. or In the touch unit where the first auxiliary electrode is provided, the orthographic projections of the first sub-electrode and the second sub-electrode on the substrate fall within the orthographic projection of the first auxiliary electrode on the substrate.

4. The touch substrate according to claim 1, characterized in that, In the touch unit provided with the second auxiliary electrode, each of the second sub-electrodes is connected to the second auxiliary electrode.

5. The touch substrate according to claim 1, characterized in that, In the touch unit that is provided with the first auxiliary electrode and the second auxiliary electrode, The orthographic projection of the second auxiliary electrode on the substrate overlaps with the orthographic projections of the first sub-electrode and the second sub-electrode on the substrate, and the second sub-electrode and the second auxiliary electrode are on different layers; or The orthographic projections of the first sub-electrode and the second sub-electrode on the substrate are located within the orthographic projection of the second auxiliary electrode on the substrate.

6. The touch substrate according to claim 1, characterized in that, The orthographic projections of the first auxiliary electrode and the second auxiliary electrode on the substrate coincide.

7. The touch substrate according to claim 1, characterized in that, The first auxiliary electrode and the second auxiliary electrode are on the same layer as the first sub-electrode or on the same layer as the conductive bridge, and the orthogonal projection of the first auxiliary electrode on the substrate is located within the orthogonal projection of the second auxiliary electrode on the substrate.

8. A touch panel, characterized in that, The touch substrate includes any one of claims 1 to 7.

9. The touch panel according to claim 8, characterized in that, The substrate is a display substrate.

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