CN114115597A

CN114115597A - Design method of touch electrode, touch substrate and display device

Info

Publication number: CN114115597A
Application number: CN202111394718.XA
Authority: CN
Inventors: 曾扬; 罗昶; 张元其; 张毅
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: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-03-01
Anticipated expiration: 2041-11-23

Abstract

The disclosure relates to the technical field of touch control, and discloses a design method of a touch electrode, a touch substrate and a display device; the design method comprises the steps of obtaining a first side length of a first side of a display area and a plurality of first preset side lengths of a first side line of a touch control periodic unit, wherein the first side and the first side line extend along a first direction; obtaining a plurality of first channel numbers according to the first side length and a plurality of first preset side lengths; selecting one of the first channel numbers which is closest to the integer as a first transition channel number, wherein a first preset side length corresponding to the first transition channel number is a first target side length, the first target side length is equal to the sum of odd number or even number of first pixel periods, and the first pixel period is the pixel period of pixels arranged along the first direction; and determining a first target channel number according to the first transition channel number. The integrity of the touch cycle units at the edge can be improved, and therefore the touch performance is improved.

Description

Design method of touch electrode, touch substrate and display device

Technical Field

The disclosure relates to the technical field of touch control, and particularly relates to a design method of a touch electrode, a touch substrate and a display device.

Background

With the rapid development of AMOLED (Active Matrix Organic Light Emitting Diode), the development of smart terminals such as mobile phones has entered the era of full-screen and narrow-frame. In order to bring a better use experience to users, the characteristics of full-screen, narrow frame, high resolution, curling and wearing and/or folding, active pen application and the like must become an important development direction of future AMOLEDs. In order to make the display panel lighter and thinner to adapt to the future folding and rolling products, fmloc (flexible Multi Layer On cell) technology was developed.

However, in the current FMLOC product, the integrity of the touch cycle unit at the edge of the display area is insufficient, thereby affecting the touch performance at the edge of the display area.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure is directed to overcome the disadvantage of poor integrity of the edge touch cycle units in the prior art, and provides a design method of a touch electrode with good integrity of the edge touch cycle units, a touch substrate and a display device.

According to an aspect of the present disclosure, a design method of a touch electrode is provided, the touch electrode includes a plurality of touch cycle units arranged in an array, the design method includes:

acquiring a first side length of a first side of a display area and a plurality of first preset side lengths of a first edge line of the touch control periodic unit, wherein the first side and the first edge line extend along a first direction;

obtaining a plurality of first channel numbers according to the first edge length and a plurality of first preset edge lengths;

selecting one of the first channel numbers which is the closest integer as a first transition channel number, wherein the first preset side length corresponding to the first transition channel number is a first target side length, the first target side length is equal to the sum of odd number or even number of first pixel periods, and the first pixel period is the pixel period of pixels arranged along the first direction;

and determining a first target channel number according to the first transition channel number.

In an exemplary embodiment of the present disclosure, obtaining a plurality of first preset side lengths of a first edge of the touch cycle unit includes:

acquiring a first pixel period of pixels arranged along the first direction in the display area;

acquiring a plurality of first preset numbers of the first pixel periods included in the first edge line, wherein the first preset numbers are positive integers;

the first preset numbers and the product of the first pixel period respectively form a plurality of first preset side lengths.

In an exemplary embodiment of the present disclosure, the first target side length is equal to a sum of odd number of first pixel periods, and the design method further includes:

and designing two adjacent touch cycle units in the first direction symmetrically relative to a first symmetric axis, wherein the first symmetric axis is a common edge line of the two adjacent touch cycle units in the first direction.

and staggering two adjacent touch control period units in the first direction in a second direction, wherein the touch control period units are staggered in the second direction by an odd number of second pixel periods, the second pixel periods are pixel periods of pixels arranged along the second direction, and the first direction is vertical to the second direction.

In an exemplary embodiment of the present disclosure, the design method further includes:

and designing the touch control periodic unit into an axisymmetric pattern, wherein a symmetry axis is a central axis of the touch control periodic unit and is parallel to the first direction.

In an exemplary embodiment of the present disclosure, determining a target number of channels according to the number of transition channels includes:

the transition channel number comprises an integer part and a decimal part, and the integer part plus one is the target channel number; or, the number of the transition channels is a positive integer, and the number of the transition channels is the number of the target channels.

According to another aspect of the present disclosure, there is provided a touch substrate including:

the touch electrode comprises a plurality of touch period units arranged in an array, a first edge line of each touch period unit extends along a first direction, a second edge line of each touch period unit extends along a second direction, the first direction is perpendicular to the second direction, the length of each first edge line is equal to the sum of odd number of first pixel periods, and the first pixel periods are pixel periods of pixels arranged along the first direction.

In an exemplary embodiment of the disclosure, two touch cycle units adjacent to each other in the first direction are symmetrically disposed with respect to a first symmetry axis, and the first symmetry axis is a common edge line of the two touch cycle units adjacent to each other in the first direction.

In an exemplary embodiment of the disclosure, two adjacent touch period units in the first direction are arranged in a staggered manner in the second direction, and are staggered by an odd number of second pixel periods, where the second pixel periods are pixel periods of pixels arranged along the second direction.

In an exemplary embodiment of the present disclosure, a length of the second edge line is equal to a sum of even number of second pixel periods, which are pixel periods of pixels arranged in the second direction.

In an exemplary embodiment of the present disclosure, the touch periodic unit is an axisymmetric pattern, and a symmetry axis is a central axis of the touch periodic unit and is parallel to the first direction.

In an exemplary embodiment of the present disclosure, two adjacent touch cycle units in the second direction are the same.

In an exemplary embodiment of the disclosure, the proportion of the touch cycle units located at the edge of the display area is greater than or equal to 95%, or less than or equal to 5%.

In an exemplary embodiment of the present disclosure, the touch substrate further includes:

a base layer;

a first set of conductive layers disposed on one side of the base layer, the first set of conductive layers including a bridge portion;

the interlayer dielectric layer is arranged on one side, away from the base layer, of the first conductive layer group, and a through hole is formed in the interlayer dielectric layer;

the second conductive layer group is arranged on one side, far away from the base layer, of the interlayer dielectric layer and comprises a touch electrode main body part, and the touch electrode main body part is connected with the bridging part through the through hole to form the touch electrode;

and the insulating layer is arranged on one side of the second conductive layer group, which is far away from the substrate layer.

In an exemplary embodiment of the present disclosure, the first group of conductive layers and the second group of conductive layers each include a first conductive layer, a second conductive layer, and a third conductive layer, the second conductive layer being disposed between the first conductive layer and the third conductive layer.

In an exemplary embodiment of the present disclosure, the first conductive layer and the third conductive layer are made of Ti, and the second conductive layer is made of Al.

According to still another aspect of the present disclosure, there is provided a display device including: the touch substrate according to any one of the above aspects.

According to the design method of the touch electrode, the number of the first channels is obtained through the first side length and the first preset side length, one of the first channel numbers which is closest to the integer is selected as the first transition channel number, and the first preset side length corresponding to the first transition channel number is the first target side length, so that the integrity of a touch cycle unit at the edge can be improved, and the touch performance is improved; the first target side length can be equal to the sum of odd first pixel periods, the limitation that the first target side length is equal to the sum of even first pixel periods in the conventional technology is broken through, the adjustable size of the first target side length can be one pixel period at the minimum, the integrity of a touch period unit at the edge can be further improved, and therefore the touch performance is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

Fig. 1 is a schematic diagram illustrating the ratio of the touch period units at the edge when the side length of the touch period unit is equal to 64 pixel periods.

Fig. 2 is a schematic diagram illustrating the ratio of the touch period units at the edge when the side length of the touch period unit is equal to 66 pixel periods.

Fig. 3 is a schematic diagram illustrating the ratio of the touch period units at the edge when the side length of the touch period unit is equal to 68 pixel periods.

Fig. 4 is a schematic block flow diagram illustrating an exemplary embodiment of a design method of a touch electrode according to the present disclosure.

Fig. 5 is a schematic structural diagram of an exemplary embodiment of a touch cycle unit according to the present disclosure.

Fig. 6 is a schematic diagram illustrating a ratio of touch cycle units at an edge of a touch electrode according to the present disclosure.

Fig. 7 is a schematic structural diagram of two adjacent touch cycle units in fig. 6 in the first direction.

Fig. 8 is a schematic structural diagram illustrating that two touch cycle units in fig. 7 cannot be connected.

Fig. 9 is a schematic structural diagram of the touch cycle unit in fig. 7 with one row of touch cycle units added and one row of touch cycle units reduced.

Fig. 10 is a schematic structural diagram of two touch cycle units in which the touch electrodes of the present disclosure are adjacent and symmetrical in the first direction.

Fig. 11 is a schematic structural diagram of an exemplary embodiment of a touch substrate according to the present disclosure.

Fig. 12 is a schematic structural diagram of an exemplary embodiment of the touch electrode in fig. 11.

Fig. 13 is a schematic structural diagram of a touch cycle unit in fig. 12.

Fig. 14 is a schematic structural diagram of two adjacent touch cycle units of the touch electrode in the first direction according to the disclosure.

Description of reference numerals:

1. a base layer;

2. a first conductive layer group; 21. a bridge portion;

3. an interlayer dielectric layer;

4. a second conductive layer group; 41. a touch electrode main body part;

5. an insulating layer;

6. a touch electrode; 61. a touch cycle unit; 611. touch-control driving electrodes; 612. touch sensing electrodes; 613. a supplemental electrode;

AA. A display area;

p1, first pixel period; p2, second pixel period;

l1, first axis of symmetry; l2, axis of symmetry;

y, a first direction; x, a second direction;

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.

The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and are not limiting on the number of their objects.

The touch electrode 6 of the FMLOC product is composed of two metal channels which are crossed with each other, and whether touch is generated or not is determined by detecting the mutual capacitance change between the two channels; moreover, in order to avoid the pixel light emitting region, the touch electrode 6 is disposed in a grid structure surrounding between the pixels. In order to match the pixel arrangement period, the side length of one touch period unit 61(pattern) is generally equal to an even number of pixel periods and is designed to be square; therefore, the periodic array can be directly carried out on the touch periodic unit 61, and the uniformity of the display area AA touch performance is ensured.

However, when the size of the touch period unit 61 is designed according to an even number of pixel periods, the adjustable size is at least two pixel periods (the side length size changes at a minimum, or the length of the two pixel periods is increased, or the length of the two pixel periods is decreased), the integrity of the edge touch period unit 61 may be insufficient, and the touch performance of the edge may be reduced. The typical requirement is that the ratio of the touch cycle units 61 at the edge (the ratio of the area of the touch cycle units 61 at the edge remaining in the display area AA after being divided by the display lines to the area of the complete touch cycle units 61) is greater than or equal to 75% or less than or equal to 20%, and the closer to 100%, the better the touch performance at the edge. As shown in fig. 1, in the case where the side length of the touch period unit 61 is equal to 64 pixel periods, the occupation ratio of the touch period unit 61 at the edge is about 75% or 93%; as shown in fig. 2, in the case where the side length of the touch cycle unit 61 is equal to 66 pixel cycles, the occupation ratio of the touch cycle unit 61 at the edge is about 20%; as shown in fig. 3, in the case where the side length of the touch cycle unit 61 is equal to 68 pixel cycles, the proportion of the touch cycle unit 61 at the edge is about 15% and the proportion is about 90%; although the general requirements can be barely met, the integrity of the edge touch cycle unit 61 is not ideal, so that the touch performance of the edge of the display area AA is affected.

The present disclosure provides a design method of a touch electrode, where the touch electrode 6 includes a plurality of touch cycle units 61 arranged in an array, as shown in fig. 4, the design method may include the following steps:

step S10, obtaining a first side length of a first side of the display area AA and a plurality of first preset side lengths of a first side line of the touch cycle unit 61, where the first side and the first side line both extend along the first direction Y.

Step S20, obtaining a plurality of first channel numbers according to the first edge length and a plurality of first preset edge lengths.

Step S30, selecting one of the first channel numbers that is closest to the integer as a first transition channel number, where the first preset side length corresponding to the first transition channel number is a first target side length, the first target side length is equal to the sum of odd or even first pixel periods P1, and the first pixel period is a pixel period of pixels arranged along the first direction.

And step S40, determining a first target channel number according to the first transition channel number.

According to the design method of the touch electrode 6, one of the first channel numbers which is the nearest integer is selected as the first transition channel number, so that the integrity of the touch cycle unit 61 at the edge can be improved, and the touch performance is improved; the first target side length is equal to the sum of odd first pixel periods P1, which breaks the limitation that the first target side length is equal to the sum of even first pixel periods P1 in the conventional technology, and the adjustable size of the first target side length can be one pixel period at the minimum, which can further improve the integrity of the edge touch period unit 61, thereby improving the touch performance.

The steps of the design method of the touch electrode 6 will be described in detail below.

In the present exemplary embodiment, a first side length of a first side of the display area AA is acquired, the first side extending in the first direction Y. A second side length of a second side of the display area AA is obtained, the second side extending along the second direction X. The first direction Y is arranged perpendicular to the second direction X.

A first pixel period P1 of pixels arranged in the first direction Y within the display area AA, a second pixel period P2 of pixels arranged in the second direction X within the display area AA, the first pixel period P1 being a distance in the first direction Y between two adjacent pixels of the same color, and the second pixel period P2 being a distance in the second direction X between two adjacent pixels of the same color are obtained.

A plurality of first preset numbers of the first pixel periods P1 included in the first edge are obtained, where the first preset numbers are positive integers, and for example, the preset numbers may be 64, 65, 66, 67, 68, and so on. A plurality of second preset numbers of the second pixel periods P2 included in the second edge are obtained, where the second preset numbers are positive integers, for example, the preset numbers may be 64, 65, 66, 67, 68, and so on.

The first preset numbers respectively correspond to the products of the first pixel periods P1 to form a plurality of first preset side lengths. The second preset numbers respectively correspond to the products of the second pixel periods P2 to form second preset side lengths.

Of course, in other example embodiments of the disclosure, a plurality of first preset side lengths of the first edge of the touch period unit 61 and a plurality of second preset side lengths of the second edge of the touch period unit 61 may be directly obtained. The first predetermined side length is equal to the product of the first predetermined number and the first pixel period P1, and the second predetermined side length is equal to the product of the second predetermined number and the second pixel period P2.

In this exemplary embodiment, a ratio of the first side length to the first preset side length is a first channel number, and the ratio of the first side length to the first preset side lengths forms a plurality of first channel numbers; similarly, the ratio of the second side length to the second preset side length is a second channel number, and the ratio of the second side length to the second preset side lengths forms a plurality of second channel numbers.

Step S30, selecting one of the first channel numbers that is the closest integer as a first transition channel number, where the first preset side length corresponding to the first transition channel number is a first target side length, and the first target side length is equal to the sum of odd number or even number of first pixel periods P1.

In this exemplary embodiment, one of the first channel numbers that is closest to the integer is selected as the first transition channel number, and the closer the channel number is to the integer, the better the integrity of the corresponding touch cycle unit 61 at the edge is, i.e., the higher or lower the occupancy of the touch cycle unit 61 at the edge is, the better the touch performance is. The first preset side length corresponding to the first transition channel number is a first target side length, and the first target side length may be equal to the sum of odd first pixel periods P1.

One of the second channel numbers closest to the integer is selected as the second transition channel number, and the closer the channel number is to the integer, the better the integrity of the corresponding touch cycle unit 61 at the edge is, i.e., the higher or lower the occupancy of the touch cycle unit 61 at the edge is, the better the touch performance is. The second preset side length corresponding to the second transition channel number is a second target side length, and the second target side length may be equal to the sum of even second pixel periods P2.

It should be noted that, the number of two channels is closest to an integer, for example, one channel is 64.15, and the other channel is 65.85; in this case, the larger the number of channels, the smaller the size of the touch cycle unit 61, the higher the touch accuracy, but the larger the number of touch signal lines, the smaller the width, the larger the resistance, and the larger the load (loading) of the touch signal lines. Therefore, under the condition of high requirement on touch accuracy, a scheme with a large number of channels can be selected; the final selection is based on other factors, such as the integrity of the touch cycle units 61 at the four corners and vias or notches (notch), the number of channels supported by the touch chip (TIC), etc.

Referring to fig. 5, a first target side length of the touch period unit 61 extending in the first direction Y may be equal to a sum of three first pixel periods P1, and a second target side length of the touch period unit 61 extending in the second direction X may be equal to a sum of four second pixel periods P2.

Referring to fig. 6, 68 pixel cycles are included in the second direction X, 65 pixel cycles are included in the first direction Y, and the occupation ratio of the touch cycle units 61 at the edge is substantially greater than 95%, so that the touch performance is also better; and the difference of the touch performance from the central position is greatly reduced.

In the present example embodiment, the number of transition channels may include an integer portion and a fractional portion, for example, the number of transition channels may be 85.04, 89.98. When designing the touch electrode 6, a complete touch cycle unit 61 needs to be set, and therefore, the fractional part needs to be complemented; that is, the integer portion plus one is the target number of channels, for example, 85+ 1-86 and 89+ 1-90.

In addition, in the case that the number of the transition channels is a positive integer, for example, the calculated number of the transition channels may be 86, and the number of the transition channels is the target number of channels, for example, the target number of the channels may be 86.

It should be noted that the above data are only examples and should not be construed as limiting the disclosure.

In addition, the design method of the touch electrode 6 may further include: two adjacent touch cycle units 61 in the first direction Y are symmetrically designed with respect to a first symmetry axis L1, where the first symmetry axis L1 is a common edge line of the two adjacent touch cycle units 61.

Referring to fig. 7, if the touch cycle units 61 are directly arrayed, that is, two adjacent touch cycle units 61 in the first direction Y are identical, so that the connection pixels of the two adjacent touch cycle units 61 in the first direction Y are different, the connection pixel of the upper touch cycle unit 61 is B-R-B, and the connection pixel of the lower touch cycle unit 61 is R-B, as shown in fig. 8, so that the two touch cycle units 61 cannot be directly connected.

Referring to fig. 9, the touch cycle units 61 located above may be increased by one row, that is, the number of pixel cycles included in the touch cycle units 61 located above may be increased by one; the touch cycle units 61 located below are reduced by one row, that is, the number of pixel cycles included in the touch cycle units 61 located below can be reduced by one row to form two different touch cycle units 61, and thus the design causes the inter-row difference of the plane content values, thereby affecting the touch performance.

Referring to fig. 10, after two adjacent touch cycle units 61 in the first direction Y are symmetrically designed with respect to the first symmetry axis L1, it can be ensured that two adjacent touch cycle units 61 in the first direction Y are completely the same, and that two adjacent touch cycle units 61 in the first direction Y can be completely connected, thereby improving the touch performance.

Referring to fig. 14, in other example embodiments of the present disclosure, two touch period units 61 adjacent in the first direction Y may be arranged by being shifted in the second direction X by an odd number of second pixel periods P2, for example, by one second pixel period P2; the second pixel period P2 is a pixel period of pixels arranged in the second direction X. In this way, it can also be ensured that two touch cycle units 61 adjacent to each other in the first direction Y can be completely connected under the condition that the length of the first edge line of the touch cycle unit 61 is equal to the sum of odd first pixel periods P1, thereby improving the touch performance.

Referring to fig. 13, the method for designing the touch electrode 6 may further include: the touch periodic unit 61 is designed to be an axisymmetrical pattern, and the symmetry axis L2 is a central axis of the touch periodic unit 61 and is parallel to the first direction Y.

In the case that the touch period units 61 are not symmetrical patterns, the touch electrodes in two adjacent rows are not completely identical, and the capacitance values of the adjacent rows still have a small difference. After the touch period unit 61 is designed as an axisymmetric pattern, the capacitance values of adjacent rows will not differ.

It should be noted that although the steps of the design method of the touch electrode 6 in the present disclosure are described in a specific order in the drawings, this does not require or imply that the steps must be performed in the specific order or that all of the illustrated steps must be performed to achieve the desired results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc.

Based on the same inventive concept, the disclosed example embodiments provide a touch substrate, which, as shown in fig. 5, 10-13, may include a touch electrode 6, where the touch electrode 6 may be designed by any one of the above design methods; the touch electrode 6 may include a plurality of touch period units 61 arranged in an array, a first edge of each of the touch period units 61 extends along a first direction Y, a second edge of each of the touch period units 61 extends along a second direction X, the first direction Y is perpendicular to the second direction X, a length of the first edge is equal to a sum of odd number of first pixel periods P1, and the first pixel period P1 is a pixel period of pixels arranged along the first direction Y.

In some example embodiments of the present disclosure, the touch substrate may include a base layer 1, a first conductive layer group 2, an interlayer dielectric layer 3, a second conductive layer group 4, and an insulating layer 5. The base layer 1 may be formed by a deposition process, and the material of the base layer may be silicon nitride (SiNx).

The first conductive layer group 2 can be arranged on one side of the substrate layer 1; the first conductive layer group 2 may be formed by deposition and photolithography processes, the first conductive layer group 2 may include a first conductive layer, a second conductive layer, and a third conductive layer, the second conductive layer is disposed between the first conductive layer and the third conductive layer, the first conductive layer and the third conductive layer may be made of Ti, and the second conductive layer may be made of Al.

The interlayer dielectric layer 3 can be arranged on one side of the first conductive layer group 2 far away from the substrate layer 1, and a through hole is formed in the interlayer dielectric layer 3; the interlayer dielectric material layer may be formed by a deposition process and then subjected to a photolithography process to form the via hole and the interlayer dielectric layer 3. The interlayer dielectric layer 3 may be made of silicon nitride (SiNx) and plays an insulating role.

The second conductive layer group 4 is arranged on one side, far away from the substrate layer 1, of the interlayer dielectric layer 3, the second conductive layer group 4 can be formed through deposition and photoetching processes, the second conductive layer group 4 can comprise a first conductive layer, a second conductive layer and a third conductive layer, the second conductive layer is arranged between the first conductive layer and the third conductive layer, the first conductive layer and the third conductive layer can be made of Ti, and the second conductive layer can be made of Al. The second group of conductive layers 4 may be connected to the first group of conductive layers 2 by vias in the interlayer dielectric layer 3.

The insulating layer 5 is disposed on a side of the second conductive layer group 4 away from the substrate layer 1, the insulating layer 5 may be made of PI (polyimide), and the insulating layer 5 plays an insulating protection role.

Of course, in other example embodiments of the present disclosure, the first conductive layer group 2 and the second conductive layer group 4 may be provided as a single-layer conductive structure, a double-layer conductive structure, or a more-layer conductive structure. The material may be various conductive materials, which are not described herein.

The first conductive layer group 2 may include a bridge portion 21, a first touch signal line, and a second touch signal line (not shown). The bridging portion 21 may be disposed in the display area AA, and the first touch signal line and the second touch signal line may be disposed in the non-display area AA, that is, the first touch signal line and the second touch signal line are disposed on the periphery of the touch electrode 6.

The second conductive layer group 4 may include a touch electrode main body portion 41, the touch electrode main body portion 41 is connected to the bridging portion 21 through a via hole, and the touch electrode main body portion 41 and the bridging portion 21 form a touch electrode 6. The touch electrode main body portion 41 is connected to the first touch signal line and the second touch signal line through via holes. The first touch signal line may include a first touch driving signal line and a first touch sensing signal line, and the first touch driving signal line inputs a driving signal to the touch electrode 6 and then outputs the driving signal through the first touch sensing signal line. The second touch signal line may include a second touch driving signal line and a second touch sensing signal line, and the second touch driving signal line inputs a driving signal to the touch electrode 6 and then outputs the driving signal through the second touch sensing signal line. Of course, the first touch signal line may include a first touch driving signal line, and the second touch signal line may include a second touch sensing signal line.

The touch electrode 6 may include a plurality of touch cycle units 61 arranged in an array. The touch cycle unit 61 may include a touch driving electrode 611 and a touch sensing electrode 612, the touch driving electrode 611 extends along the first direction Y, and the touch sensing electrode 612 extends along the second direction X. The first electrode and the touch sensing electrode 612 are arranged in a grid structure.

The touch driving electrode 611 includes a first portion and a second portion, which are connected by the bridge portion 21 of the first conductive layer group 2. The touch driving electrodes 611 of the adjacent touch cycle units 61 are connected to form the touch driving electrodes 611 of the touch electrode 6 integrally.

The touch sensing electrode 612 includes two portions symmetrically disposed about the symmetry axis L2, and the two portions are directly connected together, that is, the two portions are directly connected together on the second conductive layer group. The touch sensing electrodes 612 of the adjacent touch cycle units 61 are connected to form the touch sensing electrodes 612 of the touch electrode 6 integrally.

The touch driving electrode 611 and the touch sensing electrode 612 are further provided with a supplementary electrode 613, and the supplementary electrode 613 is substantially square.

Referring to fig. 5, the touch cycle unit 61 may be configured as a rectangle, and the touch cycle unit 61 has a first side line and a second side line, the first side line extends along a first direction Y, the second side line extends along a second direction X, and the first direction Y is perpendicular to the second direction X. The length of the first edge line is equal to the sum of odd first pixel periods P1, and the first pixel period P1 is the pixel period of the pixels arranged along the first direction Y. The length of the second edge line is equal to the sum of even-numbered second pixel periods P2, and the second pixel period P2 is the pixel period of the pixels arranged in the second direction X. The first pixel period P1 and the second pixel period P2 may be the same or different.

Referring to fig. 10, two adjacent touch periodic units 61 in the first direction Y are symmetrically disposed with respect to a first symmetry axis L1, and the first symmetry axis L1 is a common edge line of the two adjacent touch periodic units 61 in the first direction Y. By such a configuration, it can be ensured that two adjacent touch cycle units 61 in the first direction Y are completely the same, and it can be ensured that two adjacent touch cycle units 61 in the first direction Y can be completely connected, thereby improving the touch performance.

Referring to fig. 13, the touch periodic unit 61 may be an axisymmetrical pattern, and a symmetry axis L2 is a central axis of the touch periodic unit 61 and is parallel to the first direction Y. If the touch period unit 61 is not an axisymmetric pattern, the touch sensing electrodes 612 in two adjacent rows are not completely identical, and the capacitance values of the adjacent rows still have a small difference. After the touch period unit 61 is designed as an axisymmetric pattern, the capacitance values of adjacent rows will not differ.

In other example embodiments of the present disclosure, referring to fig. 14, two adjacent touch cycle units 61 in the first direction Y are arranged in a staggered manner in the second direction X, and are staggered by an odd number of second pixel periods P2, for example, by one second pixel period P2; that is, the touch period unit 61 is shifted by three first pixel periods P1 along the first direction Y and is shifted by one second pixel period P2 along the second direction X. In this case, the arrangement of the touch periodic cells 61 in the even-numbered rows is generally identical, the arrangement of the touch periodic cells 61 in the odd-numbered rows is generally identical, and the touch periodic cells 61 in the even-numbered rows are offset from the touch periodic cells 61 in the odd-numbered rows by one second pixel period P2. The second pixel period P2 is a pixel period of pixels arranged in the second direction X. In this way, it can also be ensured that two touch cycle units 61 adjacent to each other in the first direction Y can be completely connected under the condition that the length of the first edge line of the touch cycle unit 61 is equal to the sum of odd first pixel periods P1, thereby improving the touch performance.

Two adjacent touch cycle units 61 in the second direction X are the same, that is, two adjacent touch cycle units 61 in the second direction X are obtained by translating the same touch cycle unit 61; two adjacent touch cycle units 61 in the second direction X can be ensured to be completely the same, thereby improving the touch performance.

In other example embodiments of the present disclosure, the length of the first edge is equal to the sum of odd number of first pixel periods P1. The length of the second edge is also equal to the sum of the odd number of second pixel periods P2. In this case, two touch periodic units 61 adjacent in the first direction Y are symmetrically disposed with respect to the first symmetry axis L1, and the first symmetry axis L1 is a common edge line of the two touch periodic units 61 adjacent in the first direction Y. Two adjacent touch cycle units 61 in the second direction X are symmetrically disposed with respect to a second symmetry axis, which is a common edge line of the two adjacent touch cycle units 61 in the second direction X. By such a configuration, it can be ensured that two adjacent touch cycle units 61 in the first direction Y and the second direction X are completely the same, and it can be ensured that two adjacent touch cycle units 61 in the first direction Y and the second direction X can be completely connected, thereby improving the touch performance.

Based on the same inventive concept, the disclosed example embodiments provide a display device, which may include the touch substrate described in any one of the above. The specific structure of the touch substrate has been described in detail above, and therefore, the detailed description thereof is omitted here.

The display device can include a display panel, a packaging layer group arranged on one side of the display panel, and a touch substrate arranged on one side, far away from the display panel, of the packaging layer group.

The specific type of the display device is not particularly limited, and any display device commonly used in the art may be used, specifically, for example, a mobile device such as a mobile phone, a wearable device such as a watch, a VR device, and the like.

It should be noted that, the display device includes other necessary components and components besides the touch display panel, taking a display as an example, specifically, such as a housing, a circuit board, a power line, and the like, and those skilled in the art can supplement the display device accordingly according to specific use requirements of the display device, and details are not described herein.

Compared with the prior art, the beneficial effects of the display device provided by the exemplary embodiment of the present invention are the same as those of the touch substrate provided by the exemplary embodiment described above, and are not repeated herein.

In the present specification, "parallel" means a state where an angle formed by two straight lines is-10 ° or more and 10 ° or less, and therefore, includes a state where the angle is-5 ° or more and 5 ° or less. The term "perpendicular" refers to a state in which an angle formed by two straight lines is 80 ° or more and 100 ° or less, and therefore includes a state in which an angle is 85 ° or more and 95 ° or less.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A design method of a touch electrode, wherein the touch electrode comprises a plurality of touch cycle units arranged in an array, the design method comprises the following steps:

2. The method for designing the touch electrode according to claim 1, wherein obtaining a plurality of first preset side lengths of the first edge of the touch cycle unit comprises:

3. The method for designing the touch electrode according to claim 1, wherein the first target side length is equal to a sum of odd first pixel periods, the method further comprising:

4. The method for designing the touch electrode according to claim 1, wherein the first target side length is equal to a sum of odd first pixel periods, the method further comprising:

5. The design method of the touch electrode according to claim 3 or 4, further comprising:

6. The method for designing the touch electrode according to claim 1, wherein determining the number of target channels according to the number of transition channels comprises:

7. A touch substrate, comprising:

8. The touch substrate of claim 7, wherein two touch cycle units adjacent to each other in the first direction are symmetrically disposed with respect to a first symmetry axis, and the first symmetry axis is a common edge line of the two touch cycle units adjacent to each other in the first direction.

9. The touch substrate of claim 7, wherein two adjacent touch period units in the first direction are staggered in the second direction by an odd number of second pixel periods, and the second pixel periods are pixel periods of pixels arranged along the second direction.

10. The touch substrate of claim 7, wherein the length of the second edge line is equal to the sum of an even number of second pixel periods, and the second pixel periods are pixel periods of pixels arranged along the second direction.

11. The touch substrate of claim 10, wherein the touch periodic unit is an axisymmetric pattern, and a symmetry axis is a central axis of the touch periodic unit and is parallel to the first direction.

12. The touch substrate of claim 10, wherein two adjacent touch cycle units in the second direction are the same.

13. The touch substrate of claim 7, wherein the percentage of the touch cycle units located at the edge of the display area is greater than or equal to 95%, or less than or equal to 5%.

14. The touch substrate of claim 7, further comprising:

a base layer;

15. The touch substrate of claim 14, wherein the first set of conductive layers and the second set of conductive layers each comprise a first conductive layer, a second conductive layer, and a third conductive layer, the second conductive layer being disposed between the first conductive layer and the third conductive layer.

16. The touch substrate of claim 15, wherein the first conductive layer and the third conductive layer are made of Ti, and the second conductive layer is made of Al.

17. A display device, comprising: the touch substrate of any of claims 6-16.