CN113342205B

CN113342205B - Touch panel and touch display device

Info

Publication number: CN113342205B
Application number: CN202110671982.7A
Authority: CN
Inventors: 王强; 张贵玉; 姜立清; 罗萍; 王志强; 杨树奎; 刘帅
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2024-03-15
Anticipated expiration: 2041-06-17
Also published as: CN113342205A

Abstract

The application discloses a touch panel and a touch display device, and relates to the technical field of touch. In the touch electrode structure of the touch panel, the area of orthographic projection of the first pattern with smaller distance from the driving circuit on the display substrate is larger than that of orthographic projection of the second pattern with larger distance from the driving circuit on the display substrate, so that the capacitance of the first pattern is larger than that of the second pattern. Under the condition that the driving signal transmitted to the second pattern by the driving circuit is smaller than the driving signal transmitted to the first pattern, the first pattern and the second pattern can be conveniently filled with the driving signal provided by the driving circuit at the same time, and the uniformity of touch response of the touch panel is good.

Description

Touch panel and touch display device

Technical Field

The present disclosure relates to touch technology, and more particularly, to a touch panel and a touch display device.

Background

The touch panel comprises a display substrate, a touch electrode structure positioned on the display substrate, a driving circuit and a detection circuit, wherein the driving circuit and the detection circuit are electrically connected with the touch electrode structure. The driving circuit can provide driving signals for the touch electrode structure. When the finger of the user approaches the touch electrode structure, the detection circuit can detect the change of the sensing signal of the touch electrode structure at the position of the finger of the user, and can determine the position of the change of the sensing signal as the touch position.

However, the distance between the part of the touch electrode structure far away from the driving circuit and the driving circuit is larger, so that the driving signal provided by the driving circuit for the part of the touch electrode structure far away from the driving circuit has certain signal attenuation, and the uniformity of the touch response of the touch panel is poor.

Disclosure of Invention

The application provides a touch panel and a touch display device, which can solve the problem of poor uniformity of touch response of the touch panel in the related technology. The technical scheme is as follows:

in one aspect, there is provided a touch panel including:

a display substrate having a first region, a second region, and a third region, wherein the second region is adjacent to the first region relative to the third region;

the touch electrode structure is positioned on one side of the display substrate and comprises a first pattern positioned in the second area and a second pattern positioned in the third area;

the driving circuit is positioned at one side of the display substrate, is positioned in the first area, and is electrically connected with the touch electrode structure and is used for providing driving signals for the touch electrode structure;

the area of the orthographic projection of the first pattern on the display substrate is larger than that of the orthographic projection of the second pattern on the display substrate.

Optionally, the first pattern includes a plurality of first wires, and the plurality of first wires are in a grid shape; the second pattern comprises a plurality of second wires which are in a grid shape;

the width of the first wire is larger than or equal to that of the second wire.

Optionally, the first trace and the second trace are both broken lines.

Optionally, the grid pattern formed by the first wires includes a plurality of first grids, and the first grids enclose a plurality of second grids;

the area of the second grid is larger than the area of the first grid.

Optionally, the grid pattern formed by the second wires includes a plurality of third grids, and the third grids enclose a plurality of fourth grids;

the area of the fourth grid is larger than the area of the third grid.

Optionally, the grid-shaped pattern formed by the first wires includes a plurality of fifth grids, and at least two adjacent fifth grids in the plurality of fifth grids are collinear;

the grid-shaped pattern formed by the second wires comprises a plurality of sixth grids, and at least two adjacent sixth grids in the plurality of sixth grids are collinear.

Optionally, the display substrate further has a fourth region located between the second region and the third region; the touch electrode structure further comprises a third pattern positioned in the third region;

the area of the orthographic projection of the third pattern on the display substrate is smaller than the area of the orthographic projection of the first pattern on the display substrate and larger than the area of the orthographic projection of the second pattern on the display substrate.

Optionally, the touch electrode structure includes: a first touch electrode and a second touch electrode insulated from the first touch electrode; the touch panel further includes: a detection circuit located in the first region;

the driving circuit is electrically connected with the first touch electrode and is used for providing a driving signal for the first touch electrode;

the detection circuit is electrically connected with the second touch electrode and is used for detecting an induction signal between the first touch electrode and the second touch electrode received from the second touch electrode.

Optionally, one of the first touch electrode and the second touch electrode includes a plurality of touch patterns and a plurality of bridging portions; the touch electrode structure further includes: an insulating layer having a via;

the touch pattern and the other touch electrode are positioned on the same layer, and the touch pattern and the bridging part are positioned on different layers, and two adjacent touch patterns are electrically connected with at least one bridging part through the via hole.

In another aspect, a touch display device is provided, including: a power supply assembly and a touch panel as described above;

the power supply assembly is used for supplying power to the touch panel.

The beneficial effects that this application provided technical scheme brought include at least:

the application provides a touch panel and a touch display device, because in the touch electrode structure of the touch panel, the area of orthographic projection of a first pattern with smaller distance from a driving circuit on a display substrate is larger than the area of orthographic projection of a second pattern with larger distance from the driving circuit on the display substrate, and therefore, the capacitance of the first pattern is larger than that of the second pattern. Under the condition that the driving signal transmitted to the second pattern by the driving circuit is smaller than the driving signal transmitted to the first pattern, the first pattern and the second pattern can be conveniently filled with the driving signal provided by the driving circuit at the same time, and the uniformity of touch response of the touch panel is good.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a touch panel according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a portion of the touch electrode structure shown in FIG. 1 in the area A;

FIG. 3 is a schematic diagram of a portion of the touch electrode pattern shown in FIG. 1 in the region B;

FIG. 4 is a schematic diagram of a portion of the touch electrode pattern shown in FIG. 1 in the region C;

fig. 5 is a schematic structural diagram of another touch panel according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a portion of the touch electrode pattern shown in FIG. 5 in the region D;

fig. 7 is a sectional view of fig. 1 in the direction EE;

FIG. 8 is a schematic diagram of a portion of the touch electrode structure shown in FIG. 1 in the F region;

FIG. 9 is a partial schematic view of FIG. 8 at region G;

fig. 10 is a schematic structural diagram of a touch display device according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a touch panel according to an embodiment of the present application, and referring to fig. 1, the touch panel 10 may include: a display substrate 101, a touch electrode structure 102 and a driving circuit 103. The touch electrode structure 102 and the driving circuit 103 are all located at one side of the display substrate 101.

As can be seen with reference to fig. 1, the display substrate 101 may have a first region 101a, a second region 101b, and a third region 101c. Wherein the second region 101b is close to the first region 101a with respect to the third region 101c.

Referring to fig. 1, the touch electrode structure 102 may include a first pattern 1021 located in the second region 101b and a second pattern 1022 located in the third region 101c. The driving circuit 103 is located in the first area 101a, and the driving circuit 103 is electrically connected to the touch electrode structure 102 and is configured to provide a driving signal for the touch electrode structure 102.

Fig. 2 is a schematic partial view of the touch electrode structure shown in fig. 1 in the region a. Referring to fig. 2, the area of the orthographic projection of the first pattern 1021 on the display substrate 101 in the second region 101b is larger than the area of the orthographic projection of the second pattern 1022 on the display substrate 101 in the third region.

In fig. 2, the area of the orthographic projection of the first pattern 1021 on the display substrate 101 may refer to: the total area of the orthographic projection of the plurality of traces in the first pattern 1021 on the display substrate 101. The area of the orthographic projection of the second pattern 1021 on the display substrate 101 may refer to: the total area of the orthographic projection of the plurality of traces in the second pattern 1022 on the display substrate 101.

On the premise that the width of the trace included in the first pattern 1021 is equal to the width of the trace included in the second pattern 1022, referring to fig. 2, it can be seen that since the total length of the trace included in the first pattern 1021 is longer and the total length of the trace included in the second pattern 1022 is shorter as shown in fig. 2, the area of the orthographic projection of the first pattern 1021 on the display substrate 101 is larger than the area of the orthographic projection of the second pattern 1022 on the display substrate 101.

When the driving circuit 103 supplies the driving signal to the first pattern 1021 and the second pattern 1022, since there is a difference in the distance between the driving circuit 103 and the first pattern 1021 and the second pattern 1022 (the distance between the driving circuit 103 and the first pattern 1021 is smaller and the distance between the driving circuit and the second pattern 1022 is larger), the driving signal transmitted to the second pattern 1022 may have a certain signal attenuation with respect to the driving signal transmitted to the first pattern 1021. That is, the driving signal transmitted from the driving circuit 103 to the second pattern 1022 is smaller than the driving signal transmitted to the first pattern 1021.

However, in the embodiment of the present application, since the area of the orthographic projection of the first pattern 1021 on the display substrate 101 is larger than the area of the orthographic projection of the second pattern 1022 on the display substrate 101, the capacitance of the first pattern 1021 is larger than the capacitance of the second pattern 1022. Thus, even if the driving signal transmitted to the second pattern 1022 has a certain signal attenuation with respect to the driving signal transmitted to the first pattern 1021, the first pattern 1021 and the second pattern 1022 can be substantially simultaneously filled with the driving signal, the touch performance of the third area 101c where the second pattern 1022 is located can be substantially the same as the touch performance of the second area 101b where the first pattern 1021 is located, and the uniformity of the touch response of the touch panel is improved.

In summary, in the touch panel provided by the embodiment of the present application, in the touch electrode structure of the touch panel, the area of the orthographic projection of the first pattern with a smaller distance from the driving circuit on the display substrate is larger than the area of the orthographic projection of the second pattern with a larger distance from the driving circuit on the display substrate, so that the capacitance of the first pattern is larger than the capacitance of the second pattern. Under the condition that the driving signal transmitted to the second pattern by the driving circuit is smaller than the driving signal transmitted to the first pattern, the first pattern and the second pattern can be conveniently filled with the driving signal provided by the driving circuit at the same time, and the uniformity of touch response of the touch panel is good.

Fig. 3 is a partial schematic view of the touch electrode pattern shown in fig. 1 in the region B. Referring to fig. 3, the first pattern 1021 may include a plurality of first traces 10211, and the plurality of first traces 10211 are in a grid shape. Fig. 4 is a partial schematic view of the touch electrode pattern shown in fig. 1 in the region C. Referring to fig. 4, the second pattern 1022 includes a plurality of second traces 10221, and the plurality of second traces 10221 are in a grid shape. The width of the first trace 10211 is greater than or equal to the width of the second trace 10221.

For example, in the case where the width of the first trace 10211 is greater than the width of the second trace 10221, in order to make the area of orthographic projection of the plurality of first traces 10211 on the display substrate 101 greater than the area of orthographic projection of the plurality of second traces 10221 on the display substrate 101, the total length of the plurality of first traces 10211 may be made greater than or equal to the total length of the plurality of second traces 10221. In the case where the width of the first trace 10211 is equal to the width of the second trace 10221, in order to make the area of orthographic projection of the plurality of first traces 10211 on the display substrate 101 larger than the area of orthographic projection of the plurality of second traces 10221 on the display substrate 101, the total length of the plurality of first traces 10211 may be made larger than the total length of the plurality of second traces 10221.

In an embodiment of the present application, optionally, referring to fig. 3 and 4, the first trace 10211 and the second trace 10221 are both broken lines. Of course, the first trace 10211 and the second trace 10221 may be straight lines, which is not limited in the embodiment of the present application.

As a first alternative implementation, referring to fig. 3, it can be seen that the grid-like pattern formed by the plurality of first traces 10211 of the first pattern 1021 includes a plurality of first grids a1, and the plurality of first grids a1 enclose a plurality of second grids a2. The area of the second mesh a2 is larger than that of the first mesh a 1. For example, the first mesh a1 may be a small mesh in fig. 3, and the second mesh a2 may be a large mesh in fig. 3.

Also, referring to fig. 4, the mesh-like pattern formed by the plurality of second traces 10221 of the second pattern 1022 includes a plurality of sixth meshes a6, and at least two adjacent sixth meshes a6 among the plurality of sixth meshes a6 are collinear. Wherein two adjacent sixth grids a6 are collinear may be used to represent: the second wirings 10221 between two adjacent sixth grids a6 are common.

In this implementation, referring to fig. 3 and 4, the first pattern 1021 includes a plurality of first traces 10211 having a longer total length, and the second pattern 1022 includes a plurality of second traces 10221 having a shorter total length. Therefore, the width of the first trace 10211 is greater than or equal to the width of the second trace 10221, so that the front projection area of the first pattern 1021 on the display substrate 101 is ensured to be greater than the front projection area of the second pattern 1022 on the display substrate 101.

Alternatively, the width of the first trace 10211 and the width of the second trace 10221 may each range from 2 micrometers to 4 micrometers. For example, the width of the first trace 10211 and the width of the second trace 10221 are equal, each 3 micrometers.

Referring to fig. 3, the mesh-like pattern formed by the plurality of first traces 10211 of the first pattern 1021 may include a plurality of first meshes a1 each having a diamond shape. Of course, the shapes of the first grids a1 may be other shapes, such as triangles, pentagons, hexagons, and the like.

In addition, the shape of the plurality of second cells a2 surrounded by the plurality of first cells a1 may be related to the shape of the first cells a 1. The shape of the plurality of sixth grids a6 may be related to the arrangement of the second wirings 10221.

Optionally, the shapes of the first grids a1 included in the grid-shaped patterns formed by the first traces 10211 of the first pattern 1021 may be the same or different, which is not limited in the embodiment of the present application.

As a second alternative implementation, referring to fig. 3, it can be seen that the grid-like pattern formed by the plurality of first traces 10211 of the first pattern 1021 includes a plurality of first grids a1, and the plurality of first grids a1 enclose a plurality of second grids a2. The area of the second grid a2 is larger than the area of the first grid a 1. For example, the first mesh a1 may be a small mesh in fig. 3, and the second mesh a2 may be a large mesh in fig. 3.

Also, the mesh pattern formed by the plurality of second traces 10221 of the second pattern 1022 may include a plurality of third meshes, and the plurality of third meshes enclose a plurality of fourth meshes. The fourth grid has an area larger than the area of the third grid. The first trace 10211 in fig. 3 is replaced with the second trace 10221, the first grid a1 is replaced with the third grid, and the second grid a2 is replaced with the fourth grid, which is a schematic diagram of the second pattern 1022 in this implementation.

In this implementation, the total length of the plurality of first traces 10211 included in the first pattern 1021 may be equal to the total length of the plurality of second traces 10221 included in the second pattern 1022. Therefore, the width of the first trace 10211 is larger than the width of the second trace 10221, so that the front projection area of the first pattern 1021 on the display substrate 101 is ensured to be larger than the front projection area of the second pattern 1022 on the display substrate 101.

Alternatively, the width of the first trace 10211 and the width of the second trace 10221 may each range from 2 micrometers to 4 micrometers. For example, the width of the first trace 10211 is 4 micrometers, and the width of the second trace 10221 is 2 micrometers.

In the embodiment of the present application, the shape of the first grids a1 included in the grid-like pattern formed by the first wires 10211 of the first pattern 1021 and the shape of the third grids of the grid-like pattern formed by the second wires 10221 of the second pattern 1022 may be diamond shapes. Of course, the shapes of the plurality of first grids a1 and the plurality of second grids a2 may be other shapes, such as triangles, pentagons, hexagons, and the like.

In addition, the shape of the plurality of second cells a2 surrounded by the plurality of first cells a1 may be related to the shape of the first cells a 1. The shape of the plurality of fourth cells surrounded by the plurality of third cells may be related to the shape of the third cells.

Alternatively, the shapes of the plurality of first grids a1 may be the same or different, and the shapes of the plurality of second grids a2 may be the same or different.

As a third alternative implementation, referring to fig. 4, the grid-like pattern formed by the plurality of second traces 10221 of the second pattern 1022 includes a plurality of sixth grids a6, and at least two adjacent sixth grids a6 of the plurality of sixth grids a6 are collinear. The grid pattern formed by the first traces 10211 of the first pattern 1021 includes a plurality of fifth grids, and at least two adjacent fifth grids in the plurality of fifth grids are collinear.

The second trace 10221 in fig. 4 is replaced with the first trace 10211, and the sixth grid a6 is replaced with the fifth grid, which is a schematic diagram of the first pattern 1021 in this implementation.

In addition, the shape of the plurality of fifth meshes may be related to the shape of the first trace 10211. The shape of the plurality of sixth grids a6 may be related to the arrangement of the second wirings 10221.

In the embodiment of the present application, referring to fig. 5, it can also be seen that the display substrate 101 may further have a fourth region 101d located between the second region 101b and the third region 101c. The touch electrode structure 102 may further include a third pattern 1023 located in the fourth region 101d.

Wherein, the distance between the third pattern 1023 and the driving circuit 103 is greater than the distance between the first pattern 1021 and the driving circuit 103 and less than the distance between the second pattern 1022 and the driving circuit 103. That is, the third pattern 1023 may be a transition pattern between the first pattern 1021 and the second pattern 1022.

Thus, the area of the orthographic projection of the third pattern 1023 on the display substrate 101 is smaller than the area of the orthographic projection of the first pattern 1021 on the display substrate 101 and larger than the area of the orthographic projection of the second pattern 1022 on the display substrate 101, and the capacitance of the third pattern 1023 may be smaller than the capacitance of the first pattern 1021 and larger than the capacitance of the second pattern 1022. That is, the first pattern 1021, the second pattern 1022, and the third pattern 1023 can be filled with the driving signals substantially simultaneously, and uniformity of touch response of the first touch panel can be ensured.

Fig. 6 is a partial schematic view of the touch electrode pattern shown in fig. 5 in the region D. In fig. 6, the area of orthographic projection of the third pattern 1023 on the display substrate 101 may refer to: the area of the orthographic projection of the traces in the third pattern 1023 on the display substrate 101.

Optionally, referring to fig. 6, the third pattern 1023 may include a plurality of third wires 10231, and the plurality of third wires 10231 may be in a grid shape. The width of the third trace 10231 may be less than or equal to the width of the first trace 10211 and greater than or equal to the width of the second trace 10221.

For example, in the case where the width of the third wire 10231 is smaller than the width of the first wire 10211 and larger than the width of the second wire 10221, in order to make the area of orthographic projection of the plurality of third wires 10231 on the display substrate 101 smaller than the area of orthographic projection of the plurality of first wires 10211 on the display substrate 101 and larger than the area of orthographic projection of the plurality of second wires 10221 on the display substrate 101, the total length of the plurality of third wires 10231 may be made smaller than or equal to the total length of the plurality of first wires 10211 and larger than or equal to the total length of the plurality of second wires 10221.

In the case where the widths of the first wires 10211, the widths of the second wires 10221, and the widths of the third wires 10231 are all equal, in order to make the area of orthographic projection of the plurality of third wires 10231 on the display substrate 101 smaller than the area of orthographic projection of the plurality of first wires 10211 on the display substrate 101 and larger than the area of orthographic projection of the plurality of second wires 10221 on the display substrate 101, the total length of the plurality of third wires 10231 may be made smaller than the total length of the plurality of first wires 10211 and larger than the total length of the plurality of second wires 10221.

Optionally, referring to fig. 6, third trace 10231 is a polyline. Of course, the third trace 10231 may be a straight line, which is not limited in the embodiment of the present application.

For the first implementation manner, if the touch electrode structure 102 further includes the third pattern 1023 located in the third area 101c, the plurality of third wires 10231 of the third pattern 1023 include a plurality of first sub-wires b1 and a plurality of second sub-wires b2. The grid pattern formed by the third wires 10231 includes a seventh grid a7 formed by the first sub-wires b1, and the seventh grid a7 and the second sub-wires b2 enclose a plurality of eighth grids a8. The eighth mesh a8 has an area larger than that of the seventh mesh a7. For example, the seventh mesh a7 may be a small mesh in fig. 6, and the eighth mesh a8 may be a large mesh in fig. 6.

Referring to fig. 6, there are at least two adjacent eighth grids a8 among the plurality of eighth grids a8 that are collinear (i.e., the two adjacent eighth grids a8 share the second sub-trace b 2), and there are also at least two adjacent eighth grids a8 with a plurality of seventh grids a7 therebetween.

In this implementation, the third pattern 1023 includes a plurality of third traces 10231 having a total length that is less than a total length of the plurality of first traces 10211 included in the first pattern 1021 and greater than a total length of the plurality of second traces 10221 included in the second pattern 1022. Therefore, the width of the third wires 10231 is smaller than or equal to the width of the first wires 10211 and larger than or equal to the width of the second wires 10221, so that the area of orthographic projection of the plurality of third wires 10231 on the display substrate 101 can be ensured, the area of orthographic projection of the plurality of first wires 10211 on the display substrate 101 is smaller than the area of orthographic projection of the plurality of second wires 10221 on the display substrate 101.

Alternatively, the width of third trace 10231 may range from 2 micrometers to 4 micrometers. For example, the width of third trace 10231 may be 3 microns.

Alternatively, the shapes of the seventh grids a7 formed by the first sub-traces b1 of the third pattern 1023 may be diamond shapes. Of course, the shapes of the seventh grids a7 may be other shapes, such as triangles, pentagons, hexagons, and the like.

Optionally, the shapes of the seventh grids a7 may be the same as or different from the shapes of the first grids a1, which is not limited in the embodiment of the present application.

For the second implementation manner, if the touch electrode structure 102 further includes the third pattern 1023 located in the third area 101c, the grid-like pattern formed by the plurality of third wires 10231 of the third pattern 1023 includes a plurality of ninth grids, and the plurality of ninth grids enclose a plurality of tenth grids. The area of the tenth grid is larger than the area of the ninth grid. The first trace 10211 in fig. 3 is replaced with a third trace 10231, the first grid a1 is replaced with a ninth grid, and the second grid a2 is replaced with a tenth grid, which is a schematic diagram of the third pattern 1023 in this implementation manner.

In this implementation, the total length of the plurality of third wires 10231 included in the third pattern 1023 is equal to the total length of the plurality of first wires 10211 included in the first pattern 1021 and the total length of the plurality of second wires 10221 included in the second pattern 1022. Therefore, the width of the third wires 10231 is smaller than the width of the first wires 10211 and larger than the width of the second wires 10221, so that the area of orthographic projection of the plurality of third wires 10231 on the display substrate 101 is ensured to be smaller than the area of orthographic projection of the plurality of first wires 10211 on the display substrate 101 and larger than the area of orthographic projection of the plurality of second wires 10221 on the display substrate 101.

Optionally, the shapes of the ninth grids formed by the third traces 10231 of the third pattern 1023 may be diamond shapes. Of course, the shapes of the ninth grids may be other shapes, such as triangle, pentagon, hexagon, etc.

Optionally, the shapes of the ninth grids may be the same as or different from the shapes of the first grids a1, which is not limited in the embodiment of the present application.

For the third implementation manner, if the touch electrode structure 102 further includes the third pattern 1023 located in the third area 101c, the grid-like pattern formed by the third wires 10231 of the third pattern 1023 includes a plurality of eleventh grids, and at least two adjacent eleventh grids in the plurality of eleventh grids are collinear. The second trace 10221 in fig. 4 is replaced with a third trace 10231, and the third grid is replaced with an eleventh grid, which is a schematic diagram of the third pattern 1023 in this implementation.

In this implementation, the total length of the plurality of third wires 10231 included in the third pattern 1023 may be equal to the total length of the plurality of first wires 10211 included in the first pattern 1021 and the total length of the plurality of second wires 10221 included in the second pattern 1022. Therefore, the width of the third wires 10231 is smaller than the width of the first wires 10211 and larger than the width of the second wires 10221, so that the area of orthographic projection of the plurality of third wires 10231 on the display substrate 101 is ensured to be smaller than the area of orthographic projection of the plurality of first wires 10211 on the display substrate 101 and larger than the area of orthographic projection of the plurality of second wires 10221 on the display substrate 101.

Alternatively, the width of third trace 10231 may range from 2 micrometers to 4 micrometers. For example, the width of third trace 10231 is 3 micrometers.

Referring to fig. 1 and 5, fig. 1 is a view showing a region of the display substrate 101 other than the first region 101a having the driving circuit 103 disposed therein, divided into a second region 101b and a third region. Fig. 5 divides the region of the display substrate 101 other than the first region 101a having the driving circuit 103 provided therein into a second region 101b, a third region 101c, and a fourth region 101d. Of course, it is also possible to divide the area of the display substrate 101 other than the first area 101a having the driving circuit 103 provided therein into more areas. Wherein a plurality of regions other than the first region 101a in the display substrate 101 are arranged in a direction away from the first region 101a.

Alternatively, the area of the orthographic projection of the pattern of the touch electrode structure 102 on the display substrate 101 in the region far from the first region 101a is small relative to the area of the orthographic projection of the pattern of the touch electrode structure 102 on the display substrate 101 in the region near to the first region 101a. For example, the area of the orthographic projection of the pattern of the touch electrode structure 102 on the display substrate 101 gradually decreases in a direction away from the first region 101a.

By way of example, the pattern of the touch electrode structure 102 in the area close to the first area 101a comprises more small grids, while the pattern of the touch electrode structure 102 in the area far from the first area 101a comprises less small grids.

In an embodiment of the present application, referring to fig. 1 and 5, the touch electrode structure 102 may include: the plurality of first touch electrodes c1 and the plurality of second touch electrodes c2 insulated from the plurality of first touch electrodes c 1. The first touch electrodes c1 are arranged along the first direction X, and the second touch electrodes c2 are arranged along the second direction Y. The first direction X intersects the second direction Y.

For example, the first direction X is perpendicular to the second direction Y. The first direction X may be an arrangement direction of the first region 101a, the second region 101b, and the third region 101v in the display substrate 101.

Referring to fig. 1 and 5, the touch panel 10 may further include: the detection circuit 104 is located in the first region 101a. The driving circuit 103 is electrically connected to the plurality of first touch electrodes c1, and is configured to provide driving signals for the plurality of first touch electrodes c 1. The detection circuit 104 is electrically connected to the plurality of second touch electrodes c2, and is configured to detect an induction signal between the first touch electrode c1 and the second touch electrode c2 received from the second touch electrode c2.

In the process that the driving circuit 103 provides the driving signals for the plurality of first touch electrodes c1, the detecting circuit 104 can detect the sensing signals between the first touch electrodes c1 and the second touch electrodes c2 received from the second touch electrodes c2. If the finger of the user approaches the touch electrode structure 102, the detection circuit 104 can detect that the sensing signal of the touch electrode structure 102 at the position of the finger of the user changes, and can determine the position at which the sensing signal changes as the touch position.

Alternatively, since the driving circuit 103 is electrically connected to the first touch electrode c1, the first touch electrode c1 may be a Transmission (TX) electrode. Since the detection circuit 104 is electrically connected to the second touch electrode c2, the second touch electrode c2 may be an induction (RX) electrode.

In the embodiment of the present application, the touch panel 10 may further include: a plurality of first connection traces 105 and a plurality of second connection traces 106. One end of each first connection trace 105 may be connected to the driving circuit 103, and the other end may be connected to one first touch electrode c 1. One end of each second connection trace 106 may be connected to the detection circuit 104, and the other end may be connected to one second touch electrode c2. That is, the driving circuit 103 is electrically connected to the first touch electrode c1 through the first connection trace 105, and the detecting circuit 104 is electrically connected to the second touch electrode c2 through the second connection trace 106.

Alternatively, since the plurality of first touch electrodes c1 are arranged along the arrangement direction (the first direction X) of each region in the display substrate 101, the length of the first connection trace 105 connected to the first touch electrode c1 having a smaller distance from the driving circuit 103 may be shorter, and the length of the first connection trace 105 connected to the first touch electrode c1 having a larger distance from the driving circuit 103 may be longer.

That is, the area of the orthographic projection of the second pattern 1022 on the display substrate 101, which is a large distance from the driving circuit 103, is smaller than the area of the orthographic projection of the first pattern 1021 on the display substrate 101, which is a small distance from the driving circuit 103. The length of the first connection trace 105 connected to the first touch electrode c1 having a larger distance from the driving circuit 103 is longer than the length of the first connection trace 105 connected to the first touch electrode c1 having a smaller distance from the driving circuit 103. Thus, the sum of the areas of the second pattern 1022 and the first connection trace 105 having a large distance from the driving circuit 103 projected on the display substrate 101 is made to be substantially equal to the sum of the areas of the first pattern 1021 and the first connection trace 105 having a small distance from the driving circuit 103 projected on the display substrate 101.

In this embodiment of the present application, one of the first touch electrode c1 and the second touch electrode c2 includes a plurality of touch patterns and a plurality of bridging portions. In fig. 1 and fig. 5, the first touch electrode c1 includes a plurality of touch patterns c11 and a plurality of bridge portions c12.

Fig. 7 is a sectional view of fig. 1 in the EE direction. Referring to fig. 7, the touch electrode structure 102 may further include: and an insulating layer c3. The insulating layer c3 has a via hole. The plurality of touch patterns c11 included in the first touch electrode c1 may be located on the same layer as the second touch electrode c2 and on different layers from the bridge portion c12, and two adjacent touch patterns c11 are electrically connected to at least one bridge portion c12 through vias in the insulating layer c3. Therefore, the plurality of touch patterns c11 included in the first touch electrode c1 can be electrically connected, and effective transmission of signals in the first touch electrode c1 is ensured.

Fig. 8 is a partial schematic view of the touch electrode structure shown in fig. 1 in the region F. As can be seen with reference to fig. 8, the touch electrode structure 102 may further include: and a floating electrode c4 which is positioned on the same layer as the touch pattern c11 of the first touch electrode c1 and the second touch electrode c2. The floating electrode c4 is insulated from the touch pattern c11 and the second touch electrode c2. The floating electrode c4 can avoid the influence of the grounding voltage on the signals in the first touch electrode c1 and the signals in the second touch electrode c2, and ensure that the detection circuit can accurately determine the touch position of the finger of the user. In order to facilitate the illustration of the positional relationship between the touch pattern c11, the second touch electrode c2 and the floating electrode c4, the bridging portion c12 of the first touch electrode c1 is not illustrated in fig. 8.

Optionally, a gap (a gap is not shown in fig. 8) may be formed between the floating electrode c4 and the touch pattern c11 and between the floating electrode c4 and the second touch electrode c2, so that the floating electrode c4 is insulated from both the touch pattern c11 and the second touch electrode c2 of the first touch electrode c 1. In addition, since the floating electrode c4 and the bridging portion c12 of the first touch electrode c1 are located at different layers, the insulating layer c3 between the floating electrode c4 and the bridging portion c12 can insulate the floating electrode c4 and the bridging portion c12.

Referring to fig. 1 and 8, the structure shown in fig. 8 is located in a second region 101b of the display substrate 101. Thus, referring to fig. 9, the floating electrode c4 may be formed of a plurality of first traces 10211 of the first pattern 1021. The description of the first trace 10211 forming the floating electrode c4 may be referred to above, and the embodiments of the present application will not be repeated here.

Note that, the portion of the touch electrode structure 102 located in the third region 101c and the fourth region 101d may also have a floating electrode c4. The floating electrode c4 of the touch electrode structure 102 in the third region 101c may be formed by a plurality of second traces 10221 of the second pattern 1022. The floating electrode c4 of the touch electrode structure 102 in the fourth area 101d may be formed by a plurality of third traces 10231 of the third pattern 1023. The description of the second trace 10212 and the third trace 10231 forming the floating electrode c4 may be referred to above, and the embodiments of the present application will not be repeated here.

Alternatively, the shape of the floating electrode c4 may be the same as the shape of the touch pattern c11 and the second touch electrode c2 in the area where the floating electrode c4 is located. Of course, the shape of the floating electrode c4 may be different from the shape of the touch pattern c11 and the second touch electrode c2 in the area where the floating electrode c4 is located, which is not limited in the embodiment of the present application.

Fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present application. Referring to fig. 10, the display device may include: the power supply assembly 20 and the touch panel 10 provided in the above embodiments. The power supply assembly 20 may be used to power the touch panel 10.

For example, the power supply assembly 20 may be connected to the driving circuit 103 and the detecting circuit 105 in the touch panel 10 for supplying power to the driving circuit 103 and the detecting circuit 105.

Optionally, the display device may be any product or component with a display function and a fingerprint identification function, such as an OLED display device, a quantum dot light emitting diode (quantum dot light emitting diodes, QLED) display device, electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, or a navigator.

The display device is, for example, an Active Matrix Organic Light Emitting Diode (AMOLED) display panel.

The foregoing description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, since it is intended that all modifications, equivalents, improvements, etc. that fall within the spirit and scope of the invention.

Claims

1. A touch panel, the touch panel comprising:

wherein the area of the orthographic projection of the first pattern on the display substrate is larger than the area of the orthographic projection of the second pattern on the display substrate;

the first pattern comprises a plurality of first wires, the first wires are in a grid shape, and the first wires are fold lines; the grid-shaped pattern formed by the first wires comprises a plurality of first grids, and the first grids enclose a plurality of second grids; the area of the second grid is larger than the area of the first grid.

2. The touch panel according to claim 1, wherein the second pattern includes a plurality of second wirings, and the plurality of second wirings are in a grid shape;

the width of the first wire is larger than or equal to that of the second wire.

3. The touch panel of claim 2, wherein the second trace is a fold line.

4. The touch panel according to claim 3, wherein the grid-like pattern formed by the plurality of second wirings includes a plurality of third grids, and the plurality of third grids enclose a plurality of fourth grids;

the area of the fourth grid is larger than the area of the third grid.

5. A touch panel according to claim 3, wherein the grid-like pattern formed by the second traces comprises a plurality of sixth grids, at least two adjacent sixth grids of the plurality of sixth grids being collinear.

6. The touch panel according to any one of claims 1 to 5, wherein the display substrate further has a fourth region located between the second region and the third region; the touch electrode structure further comprises a third pattern positioned in the fourth area;

7. The touch panel according to any one of claims 1 to 5, wherein the touch electrode structure includes: a first touch electrode and a second touch electrode insulated from the first touch electrode; the touch panel further includes: a detection circuit located in the first region;

8. The touch panel of claim 7, wherein one of the first touch electrode and the second touch electrode comprises a plurality of touch patterns and a plurality of bridging portions; the touch electrode structure further includes: an insulating layer having a via;

9. A touch display device, the touch display device comprising: a power supply assembly and a touch panel according to any one of claims 1 to 8;

the power supply assembly is used for supplying power to the touch panel.