CN115033132A - Touch panel and display device - Google Patents

Abstract

The present application relates to a touch panel and a display device, wherein the touch panel includes: the plurality of first electrodes extend along a first direction and comprise a plurality of first electrode blocks distributed along the first direction, and every two adjacent first electrode blocks are electrically connected through a connecting part; the second electrodes extend along the second direction and comprise a plurality of second electrode blocks distributed along the second direction, the adjacent second electrode blocks are electrically connected through the bridging parts, and the first direction is intersected with the second direction; the bridging portion and the connecting portion are arranged in a layered mode, in the arrangement direction of the bridging portion and the layer structure where the connecting portion is located, the orthographic projection of the bridging portion and the orthographic projection of the connecting portion are at least partially overlapped to form an overlapping area, and at least one partial area, located in the overlapping area, of the bridging portion and the connecting portion is provided with a hollow hole penetrating along the arrangement direction. The touch panel provided by the embodiment of the application can improve the electrostatic protection capability and solve the problem of touch failure caused by electrostatic discharge.

Description

Touch panel and display device

Technical Field

The present disclosure relates to the field of display technologies, and particularly to a touch panel and a display device.

Background

In the existing mobile display device and wearable display device, a touch structure is usually an indispensable part, wherein a mutual capacitance touch structure is widely applied due to its accuracy and high efficiency. Two groups of electrodes are usually arranged in a mutual capacitance structure in a crossed manner to respectively form two electrodes of a capacitor, so that the touched position can be judged according to the change of the capacitance value when the touch structure in the display panel is touched by the outside, when the touch structure in the display panel is invaded by external static electricity, static discharge is easily formed in the part areas where the two groups of electrodes are mutually crossed and overlapped, an insulating layer between the two groups of electrodes is broken down, the phenomenon of short circuit between the two groups of touch electrodes can be caused, the problem of touch failure is finally caused, and the reliability of the touch panel is seriously influenced.

Therefore, a touch panel and a display device thereof capable of improving the short circuit problem caused by electrostatic breakdown between mutual capacitance touch electrodes are needed.

Disclosure of Invention

The application provides a touch panel and a display device, which can improve the problem of insulating layer damage caused by electrostatic discharge and improve the reliability of a touch structure.

In a first aspect, a touch panel is provided according to an embodiment of the present application, including: each first electrode extends along a first direction and comprises a plurality of first electrode blocks distributed along the first direction, and every two adjacent first electrode blocks are electrically connected through a connecting part; each second electrode extends along the second direction and comprises a plurality of second electrode blocks distributed along the second direction, adjacent second electrode blocks are electrically connected through bridging parts, and the first direction is intersected with the second direction; the bridging part and the connecting part are arranged in layers, in the arrangement direction of the bridging part and the layer structure where the connecting part is located, the orthographic projection of the bridging part and the orthographic projection of the connecting part are at least partially overlapped to form an overlapping area, and a part area, located in the overlapping area, of at least one of the bridging part and the connecting part is provided with a hollow hole penetrating along the arrangement direction.

According to an aspect of an embodiment of the present application, the hollowed-out holes include at least one of rectangular holes, diamond-shaped holes, and elliptical holes.

According to an aspect of the embodiment of the present application, the number of the plurality of the hollow holes is a plurality, and the plurality of the hollow holes are distributed along a routing direction of at least one of the connection portion and the bridge portion.

According to an aspect of the embodiment of the application, the first electrode block and the second electrode block are both mesh electrodes, the connecting portion and the bridging portion are both mesh connecting lines, the connecting portion comprises the connecting lines and a plurality of first meshes formed by the connecting lines in a surrounding mode, the bridging portion comprises bridging lines and a plurality of second meshes formed by the bridging lines in a surrounding mode, the connecting lines and the bridging lines are at least partially overlapped and form an overlapping area, and the hollowed-out holes are formed in at least one of the connecting lines and the bridging lines.

According to an aspect of this application embodiment, connecting wire and bridging line all are provided with the fretwork hole.

According to an aspect of the embodiment of the application, the connecting line which is enclosed to form one of the two adjacent first meshes comprises a first line segment, the connecting line which is enclosed to form the other one comprises a second line segment, the first line segment and the second line segment extend along the same direction, the first line segment and the second line segment are arranged in a staggered mode and are connected through a transition line segment, and in the arrangement direction, the orthographic projection of the transition line segment and the orthographic projection of the bridge connection line are arranged in a staggered mode.

According to an aspect of an embodiment of the present application, the first line segment and/or the second line segment is provided with a hollow hole.

According to one aspect of the embodiment of the application, the touch panel is provided with a first metal layer, an insulating layer and a second metal layer which are sequentially stacked, a first electrode block, a second electrode block and a connecting portion are arranged on the first metal layer, a bridging portion is arranged on the second metal layer, and the bridging portion is electrically connected with the second electrode block through a via hole penetrating through the insulating layer.

According to one aspect of the embodiment of the application, the maximum width of the hollow holes is D1, the width of the mesh connecting line is D2, and D1/D2 is not less than 0.75.

According to one aspect of the embodiment of the application, the widths of the parts of the mesh-like connecting line, which are positioned at two sides of the hollow hole in the width direction of the mesh-like connecting line, are respectively D3 and D4, D3 is more than or equal to 0.5 μm, and D4 is more than or equal to 0.5 μm.

According to an aspect of the embodiment of the present application, a length of the hollow hole in an extending direction of the mesh-like connection line is greater than or equal to a width of the mesh-like connection line.

According to an aspect of the embodiment of the present application, the length of the hollow hole in the extending direction of the mesh-like connection line is 1 μm to 3 μm.

In a second aspect, an embodiment of the present application provides a display device, which includes a display panel and a touch panel in any embodiment of the first aspect, wherein the display panel includes a plurality of sub-pixels, each sub-pixel includes an open area and a non-open area, and an orthogonal projection of the connecting portion and the bridging portion in the arrangement direction is located inside an orthogonal projection of the non-open area in the arrangement direction.

The touch panel provided by the embodiment of the application adopts a mutual capacitance touch structure, wherein the first electrode blocks are connected through the connecting parts to form a first electrode, and the second electrode blocks are connected through the bridging parts crossing the connecting parts to form a second electrode. In the partial region where the connecting portion and the bridging portion are overlapped in the arrangement direction of the layer structure, at least one of the connecting portion and the bridging portion is provided with a hollow hole, so that the overlapping area of the wiring is reduced, the possibility of electrostatic breakdown in the overlapping region is reduced, the problem of insulating layer damage caused by electrostatic discharge can be improved, and the reliability of the touch control structure is improved.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present application will be described 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 disclosure;

FIG. 2 is an enlarged view of region P of FIG. 1;

fig. 3 is a partially enlarged view of a touch panel according to another embodiment of the present application;

FIG. 4 is a schematic diagram illustrating an overlapping region according to an embodiment of the present application;

FIG. 5 is an enlarged view of region Q of FIG. 4;

FIG. 6 is a cross-sectional view taken at A-A' of FIG. 2;

fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present application.

Wherein:

100-a touch panel; 200-a display panel; 300-a display device;

10-a first electrode; 20-a second electrode; 30-a first metal layer; 40-an insulating layer; 50-a second metal layer;

11-a first electrode block; 12-a connecting part; 13-an overlap region; 14-hollowed out holes; 21-a second electrode block; 22-a bridge;

121-a connecting line; 122-first mesh; 221-bridge lines; 222-a second mesh;

1211 — a first line segment; 1212-a second line segment; 1213-transition line segment;

x-a first direction; y-a second direction; z-the direction of the arrangement.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

It will be understood that when a layer or region is referred to as being "on" or "over" another layer or region in describing the structure of the element, it can be directly on the other layer or region or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.

Features and exemplary embodiments of various aspects of the present application will be described in detail below. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the existing mobile display device and wearable display device, touch control is generally adopted as a way for human-computer interaction, and on the basis, in order to make the touch control more accurate and faster, a mutual capacitance form is often adopted for a touch control module. In order to form a capacitance with a required capacity for sensing a touch signal, the two groups of electrodes are generally disposed in the same layer to shorten a pitch, and therefore, in a cross overlapping area between the two groups of electrodes, at least one of the two groups of electrodes generally needs to extend to another layer structure through a through hole to form a bridge-crossing connection structure, so as to prevent a short circuit between the two groups of electrodes. The bridging connection overlaps the same connection in the other electrode in the thickness direction thereof and is typically separated from each other by an insulating layer.

On this basis, the inventor finds that, in the using process, the touch module frequently contacts with the external environment and is more likely to receive electrostatic invasion, when the mutual capacitance structure is invaded by the external static, electrostatic discharge may be generated at the overlapping position of the bridge-crossing connection structure and the same-layer connection structure, so that an insulating layer between the bridge-crossing connection structure and the same-layer connection structure is subjected to discharge breakdown, the mutual capacitance touch module has the problem of short circuit between two groups of electrodes, and finally, touch failure may be caused, and the reliability of the touch module is seriously affected.

In order to solve the above problem, an embodiment of the present invention provides a touch panel and a display device, where the touch panel includes electrodes respectively extending along two intersecting directions, each electrode includes a plurality of electrode blocks connected in series, adjacent electrode blocks are electrically connected through a bridging portion and a connecting portion respectively, the bridging portion and the connecting portion have an overlapping region in an arrangement direction of a layer structure where the bridging portion and the connecting portion are located, and a hollow hole is formed in a portion of at least one of the bridging portion and the connecting portion in the overlapping region. The overlapping area between the bridging part wires and the connecting part wires can be reduced by the partially hollowed-out setting method, so that the probability of electrostatic breakdown between the bridging part wires and the connecting part wires is reduced, the problem of touch failure caused by electrostatic invasion is reduced, and the reliability of the touch panel is improved.

It should be understood that the following embodiments and the drawings in the present application are only described by taking the touch electrode provided by the embodiments of the present application as an example of a plurality of rectangular electrode blocks connected in series, but the present application is not limited thereto, and may also be applied to other forms of mutual capacitance electrode structures having an overlapping region, and protect the mutual capacitance electrode structures together.

For better understanding of the present application, the touch panel and the display device provided in the embodiments of the present application are described in detail below with reference to fig. 1 to 7.

Referring to fig. 1 to 3 together, fig. 1 is a schematic structural diagram of a touch panel according to an embodiment of the present disclosure, fig. 2 is an enlarged view of a region P in fig. 1, and fig. 3 is another enlarged view of the region P in fig. 1.

In a first aspect, a touch panel 100 is provided according to an embodiment of the present application, including a plurality of first electrodes 10 and a plurality of second electrodes 20, where each first electrode 10 extends along a first direction X and includes a plurality of first electrode blocks 11 distributed along the first direction X, two adjacent first electrode blocks 11 are electrically connected by a connection portion 12, meanwhile, each second electrode 20 extends along a second direction Y and includes a plurality of second electrode blocks 21 distributed along the second direction Y, adjacent second electrode blocks 21 are electrically connected by a bridge portion 22, and the first direction X intersects the second direction Y; the bridging portion 22 and the connecting portion 12 are arranged in a layered manner, in the arrangement direction Z of the layered structure where the bridging portion 22 and the connecting portion 12 are located, an orthographic projection of the bridging portion 22 and an orthographic projection of the connecting portion 12 are at least partially overlapped to form an overlapping area 13, and a partial area, located in the overlapping area 13, of at least one of the bridging portion 22 and the connecting portion 12 is provided with a hollow hole 14 penetrating along the arrangement direction.

The embodiment of the present application provides a touch panel 100, which includes a plurality of first electrodes 10 and a plurality of second electrodes 20 respectively extending along a first direction X and a second direction Y, where the first electrodes 10 may be touch scan electrodes, and the second electrodes 20 may be touch sense electrodes, or may be arranged oppositely, and this application is not limited in this respect. The plurality of first electrodes 10 may be disposed in parallel at equal intervals, and the plurality of second electrodes 20 may be disposed in parallel at equal intervals. Each first electrode 10 extending along the first direction X may include a plurality of first electrode blocks 11, the first electrode blocks 11 may have the same shape and size, and the plurality of first electrode blocks 11 may be disposed at equal intervals, and adjacent first electrode blocks 11 are electrically connected by a connection portion 12, that is, the first electrode blocks 11 and the connection portion 12 may be disposed uniformly and alternately, so as to form a first electrode 10 formed by a plurality of first electrode blocks 11 connected in series.

Similarly, the second electrode 20 may include a plurality of second electrode blocks 21 having the same shape and size, and the second electrode blocks 21 and the bridging portions 22 disposed between the second electrode blocks 21 may be uniformly and alternately disposed. It is understood that the shape and size of the first electrode block 11 and the second electrode block 21 may be the same, so as to form a more uniform touch capacitance.

Alternatively, the first direction X, the second direction Y and the arrangement direction Z in the embodiment of the present application may be perpendicular to each other, that is, the first electrode 10 and the second electrode 20 may extend perpendicular to each other, and the first electrode blocks 11 and the second electrode blocks 21 are arranged in a staggered array.

In the embodiment of the present application, the first electrode 10 and the second electrode 20 respectively extend along two intersecting directions, and when the intersection occurs, in the arrangement direction Z of the layer structure where the connection portion 12 is located and the layer structure where the bridge portion 22 is located, that is, in the stacking direction of the touch panel 100 itself, the overlapping regions 13 are respectively formed between the connection portion 12 and the bridge portion 22 that are disposed in different layer structures, and at this time, the connection portion 12 and the bridge portion 22 may be separated from each other by at least one insulating layer. At least one of the partial connection portion 12 and the partial bridge portion 22 in the overlapping region 13 is provided with a hollow pattern, and specifically, the hollow pattern may be a hollow hole 14.

It is understood that the connection portion 12 in the embodiment of the present application may be disposed on the same layer as the first electrode block 11 and/or the second electrode block 21, or may be separately disposed in a layer structure and connected to the first electrode block 11 through a via hole, etc., and the layer structure of the connection portion 12 may be located on a side of the layer structure of the bridge portion 22 away from the first electrode block 11, or may be located between the layer structure of the bridge portion 22 and the layer structure of the first electrode block 11, which is not specifically limited in the present application. The connecting portion 12 and the bridge portion 22 need only be arranged to cross each other in an insulated manner.

The hollowed-out holes 14 in the embodiment of the present application are at least partially located in the overlapping area 13, and an overlapping area of the connection portion 21 and the bridge portion 22 in the arrangement direction Z is reduced through a hollowed-out form, so that a probability of breakdown caused by electrostatic discharge generated at the overlapping area 13 is reduced. It can be understood that the hollow holes 14 are at least partially disposed in the overlapping regions 13, that is, the overlapping regions 13 may completely cover the hollow holes 14, or the hollow holes 14 may extend from the overlapping regions 13 to the non-overlapping regions, when there are two adjacent overlapping regions 13, the hollow holes 14 may continuously extend from one of the overlapping regions 13 to the other overlapping region 13, and it is only necessary to ensure that the connection portions 21 and the bridge portions 22 can form corresponding electrical connections between the electrode blocks, and the overlapping area between the traces is reduced, which is not particularly limited in the present application.

In the touch panel 100 provided in the embodiment of the present application, the hollow holes 14 are disposed in the overlapping area 13 where the connecting portion 12 and the bridging portion 22 intersect, so as to reduce the overlapping area between the traces, thereby reducing the probability of circuit damage caused by electrostatic discharge formed between the traces. Please refer to table 1 and table 2, wherein the data obtained by performing experiments on the touch panel without the through hole 14 and the touch panel 100 with the through hole 14 respectively is shown in table 2, Cm is a mutual capacitance between the first electrode 10 and the second electrode 20, Δ Cm is a touch signal amount, Cptx is a capacitive load of one of the first electrode 10 and the second electrode 20, and Cprx is a capacitive load of the other thereof. As can be seen from table 1 and table 2, before and after the hollow holes are formed, the impedance difference between the electrodes in the touch panel 100 is small, the signal amount variation value is also small, and the influence of the hollow holes 14 on the touch performance of the original touch electrodes is small, so that the reliability of the electrostatic protection of the touch panel 100 can be improved on the premise of achieving the original touch sensitivity.

Position of	Without hollowed-out holes	With hollowed-out holes
			A first electrode	22.707	22.797
Second electrode	9.076	9.234

TABLE 1 impedance comparison Table

Parameter(s)	Without hollowed-out holes	With hollowed-out holes
			Cm/pF	0.482	0.441
ΔCm/fF	90	86
			Cptx/pF	10.516	10.517
Cprx/pF	12.365	12.360

TABLE 2 touch control Signal Compass

In some alternative embodiments, the hollowed-out holes 14 comprise at least one of rectangular holes, diamond-shaped holes, and elliptical holes.

The specific shape and size of the hollow hole 12 in the embodiment of the present application can be designed for the width of the wire according to the position and the place, and on the premise of ensuring the connection of the wire to be reliable and not to be broken, the hollow hole 14 can be one or more of various shapes such as rectangular hole, rhombic hole, elliptical hole, waist-shaped hole and circular hole. Alternatively, when there are a plurality of the hollow holes 14, the plurality of the hollow holes 14 in the embodiment of the present application may all have the same shape and size, so as to facilitate design and processing.

In some optional embodiments, the number of the through holes 14 is multiple, and the multiple through holes 14 are distributed along the routing direction of at least one of the connection portion 12 and the bridge portion 22.

In the embodiment of the present application, overlapping areas 13 overlapping each other in the arrangement direction Z are provided between the connecting portion 12 and the bridging portion 22, and each overlapping area 13 may be correspondingly provided with one hollow hole 14, that is, the arrangement positions of the plurality of hollow holes 14 in the touch panel 100 are adjusted accordingly according to the arrangement manner of the overlapping areas 13; or, a plurality of hollow holes 14 may be provided in each overlapping area 13 along the extending direction of the trace where the hollow holes 14 are located, and the hollow holes 14 may be disposed in a contiguous manner or at intervals, so that the trace can retain a greater connection strength on the basis of reducing the overlapping area.

In some optional embodiments, the first electrode block 11 and the second electrode block 21 are both mesh electrodes, the connecting portion 12 and the bridging portion 22 are both mesh connecting lines, the connecting portion 12 includes a connecting line 121 and a plurality of first meshes 122 surrounded by the connecting line 121, the bridging portion 22 includes a bridging line 221 and a plurality of second meshes 222 surrounded by the bridging line 221, the connecting line 121 and the bridging line 221 at least partially overlap and form an overlapping region 13, and the hollow hole 14 is disposed in at least one of the connecting line 121 and the bridging line 221.

The first electrode block 11 and the second electrode block 21 in the embodiment of the present application may be both mesh electrodes, and the mesh touch electrode can improve light transmittance, reduce material cost, and reduce resistance of the electrode. The first electrode block 11, the second electrode block 21, the connecting portion 12, and the bridge portion 22 may be all formed of mesh conductors of rectangular meshes, and the sizes and dimensions of the meshes may be the same, thereby improving the processing efficiency of the touch panel 100.

Alternatively, the connecting portions 12 and the bridging portions 22 may be mesh-shaped connecting lines, and the hollow holes 14 are disposed in the overlapping region 13 formed by intersecting orthographic projections of the mesh-shaped connecting lines in the arrangement direction Z. In order to reduce the number of the overlapping regions 13 and have a certain distribution rule, the mesh connection lines can all form a rectangular grid, the rectangular grid in the connection part 12 and the rectangular grid in the bridge part 22 are arranged in a staggered manner, meanwhile, the size of the second mesh 222 in the bridge part 22 can be larger than that of the first mesh 122 in the connection part 12, the connection part 12 is usually arranged in the same layer with the electrode, and the connection part 12 can be formed simultaneously when the mesh electrode block is processed, so that the mesh size in the connection part 12 can be consistent with that in the first electrode block 11 and the second electrode block 21, and the bridge part 22 is usually arranged in a staggered manner with the connection part 12, so that the area of the second mesh 222 can be enlarged on the basis of achieving the required electrical connection relationship, and the use of materials is reduced.

Optionally, the manufacturing material used for manufacturing the mesh-shaped electrode in the embodiment of the present application may be at least one of a metal mesh, a silver nanowire, a carbon nanotube, a nano mesh, graphene, a conductive polymer, and the like, or the conductive material used for manufacturing the mesh-shaped electrode pattern may also be a transparent conductive material, so as to improve the overall light transmittance of the touch panel 100, and thus, a display device using the touch panel 100 may have a good light extraction rate and a good display effect.

In some alternative embodiments, the connection lines 121 and the bridge lines 221 are provided with the hollow holes 14.

In the embodiment of the application, the connection line 121 and the bridge line 221 at least partially overlap and form the overlap region 13, and the routing lines in the overlap region 13 may be all provided with the hollow holes 14, and since the extension directions of the connection line 121 and the bridge line 221 are intersected, the connection line 121 and the bridge line 221 both provided with the hollow holes 14 may further reduce the overlapping area of the connection line and the bridge line in the arrangement direction Z, thereby further improving the electrostatic protection effect.

Optionally, when the connection lines 121 and the bridge line 221 are both provided with the hollow holes 14, orthographic projections of the hollow holes 14 in the connection lines 121 and the bridge line 221 in the arrangement direction Z may be staggered, so that the hollow holes 14 provided in one may be partially overlapped with the routing lines in the other on the premise of ensuring the reliability of the electrical connection, and the overlapping area between the routing lines is reduced to a greater extent.

Referring to fig. 4 and 5 together, fig. 4 is a schematic structural diagram of an overlap region according to an embodiment of the present application, and fig. 5 is an enlarged view of a region Q in fig. 4. In some optional embodiments, the connecting line 121 enclosing to form one of the two adjacent first mesh openings 122 includes a first line segment 1211, the connecting line 121 enclosing to form the other includes a second line segment 1212, the first line segment 1211 and the second line segment 1212 extend in the same direction, the first line segment 1211 and the second line segment 1212 are arranged in a staggered manner and connected by a transition line segment 1213, and in the arrangement direction Z, an orthogonal projection of the transition line segment 1213 is arranged in a staggered manner with an orthogonal projection of the bridge line 221.

In the embodiment of the present application, the first electrode block 11 and the second electrode block 21 may be both mesh electrodes, and in this case, the mesh electrodes may be in a grid structure with rectangular meshes, that is, mesh lines in the mesh electrodes are crossed and extended along two directions perpendicular to each other. On this basis, the grid lines in the connecting portion 12 and the bridging portion 22 may be arranged to all cross. However, the touch panel 100 provided in the embodiment of the present application may be applied to the display device 300, and at this time, the display device 300 is provided with a plurality of pixel units, in order to avoid an opening area of the pixel units, a line segment that changes direction, such as an inflection or an inclination, may appear in the middle of a certain mesh of the grid lines of the mesh electrode, and the line segment that changes the extending direction in the middle of the certain mesh may generate a large-area overlapping area with the grid line of another overlapped mesh electrode, resulting in a new electrostatic breakdown-prone point.

In view of the foregoing problems, in the embodiment of the present invention, the first line segment 1211 enclosing the connection line 121 forming one of the two adjacent first mesh openings 122 and the second line segment 1212 enclosing the other one of the two adjacent first mesh openings 122 extend along the same direction, and the first line segment 1211, the second line segment 1212 and the bridge line 221 are arranged in a crossed manner, but the two line segments may be arranged in a staggered manner as needed to avoid the pixel opening area, so that the two line segments may be connected to each other through the transition line segment 1213, and at this time, the extending direction of the transition line segment 1213 may be the same as or close to the extending direction of the bridge line 221, so that a large-area overlapping area occurs between the two line segments. The orthographic projection of the transition line segment 1213 in the arrangement direction Z in the embodiment of the present application may be staggered from the bridge line 221, so that a large overlapping area between the bridge line 221 and the connection line 121 can be avoided, and the possibility of electrostatic breakdown is further reduced.

In some alternative embodiments, the first line segment 1211 and/or the second line segment 1212 are provided with hollowed-out holes 14.

As described above, the connection line 121 according to the embodiment of the present invention may include the first line 1211 and the second line 1212, which extend along the same direction and intersect with the bridge line 221, and the hollow hole 14 may be disposed in a partial area where the line segment overlaps with the bridge line 221, and the overlapping area between the connection portion 12 and the bridge portion 22 can be further reduced by staggering the routing lines extending in the same direction and disposing the hollow hole 14 at the intersection.

Referring to fig. 6, fig. 6 is a schematic diagram of a layer structure of a touch panel according to an embodiment of the present application. In some optional embodiments, the touch panel 100 has a first metal layer 30, an insulating layer 40, and a second metal layer 50 sequentially stacked, the first electrode block 11, the second electrode block 21, and the connecting portion 12 are disposed on the first metal layer 30, the bridging portion 22 is disposed on the second metal layer 50, and the bridging portion 22 and the second electrode block 21 are electrically connected through a via hole penetrating through the insulating layer 40.

In this embodiment, the connection portion 12 and the bridge portion 22 are disposed on different layer structures, and the two are separated from each other by at least one insulating layer, on this basis, the touch panel 100 in this embodiment may at least include a first metal layer 30, an insulating layer 40, and a second metal layer 50 that are sequentially stacked, where the first metal layer 30 is provided with a first electrode block 11, a second electrode block 21, and the connection portion 12, a corresponding sensing capacitor is formed between the first electrode block 11 and the second electrode block 21, and the two electrode blocks are disposed on the same layer, so that a planar capacitor can be formed between the two electrode blocks, and thus the planar capacitor has a suitable capacitance value, and thus a better touch performance can be provided. Meanwhile, the bridging portion 22 may be disposed on the second metal layer 50, the second metal layer 50 and the first metal layer 30 are insulated from each other by the insulating layer 40, and the bridging portion 22 is electrically connected to the second electrode blocks 21 on both sides by through holes penetrating through the insulating layer 40, so that a structure can be formed in which the first electrode block 11 and the second electrode block 21 are disposed on the same layer, and the connecting portion 12 and the bridging portion 22 are disposed in a layered insulating manner by the insulating layer 40 and overlap each other, thereby providing a corresponding touch control function under signal control.

In some alternative embodiments, the maximum width of the hollow-out holes 14 is D1, the width of the mesh connecting line is D2, and D1/D2 is 0.75 or more.

In the embodiment of the present application, the hollow hole 14 is disposed in at least one of the connection line 121 and the bridge line 221 within the range of the overlapping area 13, at this time, in the width direction of the mesh connection line, the width of the hollow hole 14 may be 0.5 to 0.75 times of the width of the mesh connection line, so that a suitable ratio is formed between the size occupied by the hollow hole 14 and the size of forming the electrical connection at the width position, and on the basis of reducing the overlapping area of the connection portion 12 and the bridge portion 22, a certain connection strength is maintained, and the probability of the mesh connection line being broken at the position of the hollow hole 14 is reduced.

In some alternative embodiments, the width of the mesh-like connection line on both sides of the hollow-out hole 14 in the width direction thereof is D3 and D4, D3 is greater than or equal to 0.5 μm, and D4 is greater than or equal to 0.5 μm.

As mentioned above, in the mesh electrode of the embodiment of the present application, the width of the mesh connection lines on both sides of the through-holes 14 needs to be kept to a certain width to provide the required connection reliability, and the width of the mesh connection lines on both sides of the through-holes 14 are respectively labeled as D3 and D4, so that D3 and D4 may both be greater than 0.5 μm, and the mesh connection lines at the through-holes 14 are prevented from being broken.

Optionally, the sizes of D3 and D4 are the same, that is, the hollow holes 14 are symmetrically arranged with the central axis of the mesh connection line as the symmetric axis, so that the widths of the portions of the mesh connection line on both sides of the hollow holes 14 in the width direction are the same, which can facilitate the mesh connection line to maintain a certain strength on the basis of reducing the overlapping area, and avoid the situation that the width of one side is too narrow and the mesh connection line is broken when being subjected to external impact or stress such as extrusion and bending, thereby improving the reliability of the mesh connection line to a certain extent.

In some alternative embodiments, the length of the hollow-out holes 14 in the extending direction of the mesh-shaped connection lines is greater than or equal to the width of the mesh-shaped connection lines.

The hollow holes 14 in the embodiment of the present application are used to reduce the electrostatic breakdown probability between the touch driving electrodes and the touch sensing electrodes, and therefore the hollow holes 14 may be extended in the same direction along the extending direction of the routing lines where the hollow holes are located. At this time, the extending direction of the hollow hole 14 is the width direction of another trace overlapped with the trace where the hollow hole 14 is located, so that the length of the hollow hole 14 in the extending direction of the mesh-shaped connecting line can be set to be greater than or equal to the width of the mesh-shaped connecting line, and the orthographic projection of the overlapped mesh-shaped connecting line in the arrangement direction Z is passed through the middle of the hollow hole 14, so as to obtain a better effect of reducing the overlapping area.

In some alternative embodiments, the length of the hollow-out holes 14 in the extending direction of the mesh connecting line is 1 μm to 3 μm.

The width of the grid lines in the mesh electrode of the embodiment of the present application is usually about 3 μm, and on this basis, the length of the hollow holes 14 in the extending direction of the traces can be set to 1 μm to 3 μm correspondingly, as mentioned above, the larger the length of the hollow hole 14, the smaller the trace overlapping area in the overlapping area 13, and accordingly the better the effect of preventing electrostatic breakdown, however, with the provision of the hollowed-out holes 14, the substantial width of the trace is reduced, so that the strength of the trace itself is reduced, to ensure that the grid lines remain electrically connected, without breaking, the length of the openings 14 should have an upper limit, that is, the length of the hollow hole 14 in the track extending direction can be set to be the same as the width of another track of a different layer, and the hollow holes 14 and the routing wires are correspondingly arranged in the arrangement direction Z, so that better comprehensive reliability can be obtained.

Referring to fig. 7, fig. 7 is a schematic diagram of a layer structure of a display device according to an embodiment of the present application. In a second aspect, an embodiment of the present application provides a display device 300, which includes a display panel 200 and the touch panel 100 in any embodiment of the first aspect, wherein the display panel 200 includes a plurality of sub-pixels, each sub-pixel includes an open area and a non-open area, and an orthogonal projection of the connection portion 12 and the bridge portion 22 in the arrangement direction Z is located inside an orthogonal projection of the non-open area in the arrangement direction Z.

The embodiment of the present application further provides a display device 300, where the display device 300 at least includes a touch panel 100 and a display panel 200 stacked, where the display panel 200 has a plurality of pixels, and the pixels include an opening area for emitting color light and a non-opening area for hiding and providing corresponding driving and control signals for displaying the pixels, and a position and a size of the non-opening area may be defined by providing a light shielding structure such as a black matrix. In the embodiment of the present application, the connection portion 12 and the bridging portion 22 are disposed inside the touch panel 100, and in the layer structure arrangement direction Z, the connection portion 12 and the bridging portion 22 are overlapped with the non-open area of the display panel 200, so that the influence of the crossed position between the electrodes on the light-emitting rate of the pixel can be avoided, and therefore it can be ensured that the display device 300 has a better display effect on the premise of reducing the electrostatic breakdown probability.

Further, the display device 300 provided in the embodiment of the present application has all the advantages of the touch panel 100 provided in the embodiment of the present application, and specific reference may be made to the specific description of the touch panel 100 in the foregoing embodiments, and details in this embodiment are not repeated herein.

It is to be understood that both the foregoing description and the following detailed description are exemplary and explanatory only and are not restrictive of the application, as various changes and modifications may be effected therein by those skilled in the art without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (10)

1. A touch panel, comprising:

each first electrode extends along a first direction and comprises a plurality of first electrode blocks distributed along the first direction, and every two adjacent first electrode blocks are electrically connected through a connecting part;

the second electrodes extend along a second direction and comprise a plurality of second electrode blocks distributed along the second direction, the adjacent second electrode blocks are electrically connected through a bridging part, and the first direction intersects with the second direction;

the bridge part and the connecting part are arranged in a layered mode, in the arrangement direction of the layer structures where the bridge part and the connecting part are located, the orthographic projection of the bridge part and the orthographic projection of the connecting part are at least partially overlapped to form an overlapping area, and a hollow hole penetrating in the arrangement direction is formed in a partial area, located in the overlapping area, of at least one of the bridge part and the connecting part.

2. The touch panel of claim 1, wherein the hollowed-out holes comprise at least one of rectangular holes, diamond-shaped holes, and elliptical holes.

3. The touch panel of claim 1, wherein the number of the plurality of the through holes is multiple, and the plurality of the through holes are distributed along a routing direction of at least one of the connecting portion and the bridging portion.

4. The touch panel according to claim 1, wherein the first electrode block and the second electrode block are mesh electrodes, the connecting portion and the bridging portion are mesh connecting wires, the connecting portion includes a connecting wire and a plurality of first meshes surrounded by the connecting wire, the bridging portion includes a bridging wire and a plurality of second meshes surrounded by the bridging wire, the connecting wire and the bridging wire at least partially overlap each other and form the overlapping region, and the hollow hole is disposed in at least one of the connecting wire and the bridging wire;

preferably, the connecting lines and the bridging lines are provided with hollow holes.

5. The touch panel according to claim 4, wherein the connecting lines that surround one of two adjacent first meshes include first line segments, the connecting lines that surround the other include second line segments, the first line segments and the second line segments extend in the same direction, the first line segments and the second line segments are arranged in a staggered manner and connected by transition line segments, and in the arrangement direction, orthographic projections of the transition line segments are arranged in a staggered manner with orthographic projections of the bridge lines.

6. The touch panel according to claim 5, wherein the first line segment and/or the second line segment is provided with the hollow hole.

7. The touch panel of claim 1, wherein the touch panel comprises a first metal layer, an insulating layer, and a second metal layer stacked in sequence, the first electrode block, the second electrode block, and the connecting portion are disposed on the first metal layer, the bridging portion is disposed on the second metal layer, and the bridging portion is electrically connected to the second electrode block through a via hole penetrating through the insulating layer.

8. The touch panel of claim 4, wherein the maximum width of the holes is D1, the width of the mesh-shaped connection lines is D2, and D1/D2 is 0.75 or more;

preferably, the widths of the parts of the mesh-like connecting lines, which are positioned at two sides of the hollow hole in the width direction of the mesh-like connecting lines, are D3 and D4 respectively, D3 is more than or equal to 0.5 μm, and D4 is more than or equal to 0.5 μm.

9. The touch panel according to claim 4, wherein the length of the hollow hole in the extending direction of the mesh-shaped connection line is greater than or equal to the width of the mesh-shaped connection line;

preferably, the length of the hollow-out holes in the extending direction of the mesh connecting line is 1 to 3 μm.

10. A display device comprising a display panel and the touch panel according to any one of claims 1 to 9, which are stacked;

the display panel comprises a plurality of sub-pixels, each sub-pixel comprises an opening area and a non-opening area, and the orthographic projection of the connecting part and the bridging part in the arrangement direction is positioned inside the orthographic projection of the non-opening area in the arrangement direction.

Images