CN114115597B

CN114115597B - Design method of touch electrode, touch substrate and display device

Info

Publication number: CN114115597B
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
Filing date: 2021-11-23
Publication date: 2024-06-28
Anticipated expiration: 2041-11-23

Abstract

The invention 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 through the first side length and a plurality of first preset side lengths; selecting one of the first channel numbers 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 or even first pixel periods, and the first pixel periods are pixel periods of pixels arranged along a first direction; and determining a first target channel number according to the first transition channel number. The integrity of the touch control periodic unit at the edge can be improved, so that the touch control 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 in particular relates to a design method of a touch electrode, a touch substrate and a display device.

Background

Along with the rapid development of AMOLED (Active Matrix Organic LIGHT EMITTING Diode ), the development of intelligent terminals such as mobile phones has entered the era of full screen and narrow frame. In order to bring a better use experience to the user, the features of full screen, narrow bezel, high resolution, curled wear and/or folding, active pen application, etc. will necessarily become an important development direction for the future AMOLED. To make the display panel lighter and thinner to accommodate later folded and rolled products, FMLOC (Flexible Multi Layer On Cell) technology was developed.

However, in the conventional FMLOC products, the integrity of the touch control periodic unit at the edge of the display area is insufficient, so that the touch control performance at the edge of the display area is affected.

It should be noted that the information disclosed in the above background section is only for enhancing 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 disclosure aims to overcome the defect of poor integrity of an edge touch control period unit in the prior art, and provides a design method of a touch control electrode with good integrity of the edge touch control period unit, a touch control substrate and a display device.

According to an aspect of the present disclosure, there is provided a method for designing a touch electrode including a plurality of touch cycle units arranged in an array, the method including:

acquiring 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 the 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 through the first side length and a plurality of first preset side lengths;

selecting one of the first channel numbers closest to the 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 or even first pixel periods, and the first pixel periods are pixel periods 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 side line 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 contained in the first edge, wherein the first preset numbers are positive integers;

the first preset numbers respectively correspond to products of the first pixel periods to 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 an odd number of first pixel periods, and the design method further includes:

And symmetrically designing two adjacent touch control period units in the first direction relative to a first symmetrical axis, wherein the first symmetrical axis is a shared side line of the two adjacent touch control period units in the first direction.

Two adjacent touch control period units in the first direction are arranged in a staggered mode in the second direction, and an odd number of second pixel periods are staggered, wherein the second pixel periods are pixel periods of pixels arranged in the second direction, and the first direction is perpendicular to the second direction.

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

The touch control periodic unit is designed into an axisymmetric pattern, and 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 the target number of channels from the transition number of channels includes:

the transition channel number comprises an integer part and a decimal part, wherein one is added to the integer part to be 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 periodic units which are arranged in an array, wherein a first side line of each touch periodic unit extends along a first direction, a second side line of each touch periodic unit extends along a second direction, the first direction is perpendicular to the second direction, the length of each first side line is equal to the sum of odd first pixel periods, and the first pixel periods are pixel periods of pixels arranged along the first direction.

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

In an exemplary embodiment of the disclosure, two touch cycle units adjacent in the first direction are staggered in the second direction, and an odd number of second pixel cycles are staggered, where the second pixel cycles are pixel cycles of pixels arranged along the second direction.

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

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

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

In an exemplary embodiment of the present disclosure, the duty ratio of the touch period unit located at the edge of the display area is 95% or more, or 5% or less.

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

A base layer;

The first conductive layer group is arranged on one side of the substrate layer and comprises a bridging part;

The interlayer dielectric layer is arranged on one side, far away from the substrate layer, of the first conductive layer group, and a via hole is formed in the interlayer dielectric layer;

The second conductive layer group is arranged on one side, far away from the substrate 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 via hole to form the touch electrode;

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

In one exemplary embodiment of the present disclosure, the first and second groups 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 and third conductive layers.

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 apparatus including: the touch substrate of any one of the above.

According to the design method of the touch electrode, the plurality of first channel numbers are obtained through the first side length and the plurality of first preset side lengths, one of the plurality of first channel numbers 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 the touch periodic 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 the odd number of first pixel periods, the limit that the first target side length is equal to the sum of the even number of first pixel periods in the conventional technology is broken, and the minimum size of the first target side length can be one pixel period, so that the integrity of the touch control period unit of the edge can be further improved, and the touch control 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 disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

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

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

Fig. 3 is a schematic diagram of a duty ratio of the touch period unit 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 of an exemplary embodiment of a method for designing a touch electrode of 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 of a duty ratio of a touch cycle unit at an edge of a touch electrode of 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 of the two touch cycle units in fig. 7 that cannot be connected.

Fig. 9 is a schematic diagram of a structure in which one touch cycle unit in fig. 7 is added by one row and another touch cycle unit is reduced by one row.

Fig. 10 is a schematic structural diagram of two adjacent and symmetrical touch periodic units of the touch electrode in the first direction.

Fig. 11 is a schematic structural diagram of an exemplary embodiment of a touch substrate of 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 one 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.

Reference numerals illustrate:

1. A base layer;

2. a first group of conductive layers; 21. a bridge;

3. an interlayer dielectric layer;

4. a second group of conductive layers; 41. a touch electrode main body portion;

5. An insulating layer;

6. A touch electrode; 61. a touch control period unit; 611. a touch control driving electrode; 612. a touch sensing electrode; 613. a supplemental electrode;

AA. A display area;

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

l1, a first symmetry axis; l2, symmetry axis;

y, first direction; x, second direction;

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many 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 the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof 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" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. 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 through another structure.

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

The touch electrode 6 of FMLOC is formed by two mutually crossed metal channels, and whether touch is generated or not is determined by detecting mutual capacitance change between the two channels; also, in order to avoid the pixel light emitting area, the touch electrode 6 is disposed in a grid structure surrounding between pixels. To match the pixel arrangement period, the side length of one touch period unit 61 (pattern) is generally equal to the even number of pixel periods, and is designed as a square; in this way, the touch periodic unit 61 can be directly subjected to periodic array, so that uniformity of touch performance of the display area AA is ensured.

However, when the size of the touch period unit 61 is designed with an even number of pixel periods, the adjustable size is minimum to two pixel periods (the side length is changed to be minimum, or the length of two pixel periods is added, or the length of two pixel periods is subtracted), the integrity of the touch period unit 61 at the edge may be insufficient, resulting in the touch performance at the edge being reduced. It is generally required that the ratio of the touch period units 61 at the edge (the ratio of the area of the touch period units 61 at the edge, which is remained in the display area AA after being divided by the display line, to the area of the whole touch period units 61) is equal to or greater than 75% or equal to 20%, and the touch performance is better as the touch period units 61 at the edge are closer to 100%. 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 duty 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 period unit 61 is equal to 66 pixel periods, the duty ratio of the touch period unit 61 at the edge is about 20%; as shown in fig. 3, in the case where the side length of the touch period unit 61 is equal to 68 pixel periods, the duty ratio of the touch period unit 61 at the edge is about 15% and the portion is about 90%; although the general requirements are barely satisfied, 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 exemplary embodiment of the disclosure provides a method for designing a touch electrode, where the touch electrode 6 includes a plurality of touch periodic units 61 arranged in an array, as shown in fig. 4, and the method may include the following steps:

in step S10, 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 are obtained, where the first side and the first side line extend along a first direction Y.

Step S20, obtaining a plurality of first channel numbers through the first side length and a plurality of first preset side lengths.

In step S30, one of the first channel numbers closest to the integer is selected as a first transition channel number, and the first preset side length corresponding to the first transition channel number is a first target side length, where the first target side length is equal to a sum of odd or even first pixel periods P1, and the first pixel periods are pixel periods 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 nearest integers in the first channel numbers is selected as the first transition channel number, so that the integrity of the touch periodic 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 the first pixel periods P1 which can be odd, so that the limitation that the first target side length is equal to the sum of the first pixel periods P1 which are even in the conventional technology is broken, and the minimum size of the first target side length can be one pixel period, so that the integrity of the touch control period unit 61 at the edge can be further improved, and the touch control performance is improved.

The following describes each step of the design method of the touch electrode 6 in detail.

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

The method comprises the steps of obtaining a first pixel period P1 of pixels arranged along a first direction Y in a display area AA, obtaining a second pixel period P2 of pixels arranged along a second direction X in the display area AA, wherein the first pixel period P1 is the distance between two adjacent pixels with the same color in the first direction Y, and the second pixel period P2 is the distance between two adjacent pixels with the same color in the second direction X.

A plurality of first preset numbers of the first pixel periods P1 included in the first edge are obtained, wherein the first preset numbers are positive integers, for example, the preset numbers may be 64, 65, 66, 67, 68, and the like. A plurality of second preset numbers of the second pixel periods P2 included in the second side line are acquired, wherein the second preset numbers are positive integers, and for example, the preset numbers may be 64, 65, 66, 67, 68, and the like.

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

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

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

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

In this exemplary embodiment, one of the first channel numbers 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, that is, the higher or lower the duty ratio of the touch cycle unit 61 at the edge, the better the touch performance. The first preset side length corresponding to the first transition channel number is a first target side length, which may be equal to the sum of the odd number of first pixel periods P1.

The second transition channel number is selected as one of the second channel numbers closest to the integer, and the closer the channel number is to the integer, the better the integrity of the corresponding touch control period unit 61 at the edge, that is, the higher or lower the duty ratio of the touch control period unit 61 at the edge, the better the touch control performance. The second preset side length corresponding to the second transition channel number is a second target side length, which may be equal to the sum of the even number of second pixel periods P2.

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

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

Referring to fig. 6, 68 pixel periods are included in the second direction X, 65 pixel periods are included in the first direction Y, and the duty ratio of the touch period units 61 at the edge is substantially greater than 95%, so that the touch performance is also good; and the difference of touch performance from the center 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 period unit 61 needs to be set, so that the decimal part needs to be complemented; i.e. the integer part plus one, is the target number of channels, e.g. target number of channels=85+1=86, target number of channels=89+1=90.

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

It should be noted that the above data are merely examples, and do not limit the present disclosure.

In addition, the design method of the touch electrode 6 may further include: the two adjacent touch cycle units 61 in the first direction Y are symmetrically designed with respect to the first symmetry axis L1, and the first symmetry axis L1 is a common edge 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 touch cycle unit 61 located above is B-R-B, and the connection pixel of the touch cycle unit 61 located below is R-B, referring to fig. 8, the two touch cycle units 61 cannot be directly connected.

Referring to fig. 9, the touch cycle unit 61 located above may be increased by one row, that is, the number of pixel cycles included in the touch cycle unit 61 located above may be increased by one row; the touch period units 61 located below are reduced by one row, that is, the number of pixel periods included in the touch period units 61 located below can be reduced by one row, so that two different touch period units 61 are formed, and the design can cause inter-row difference of the area content values, so that the touch performance is affected.

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 is ensured that the two adjacent touch cycle units 61 in the first direction Y are identical, and that the two adjacent touch cycle units 61 in the first direction Y can be completely connected, thereby improving 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 staggered 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 is also ensured that, in the case where the length of the first edge of the touch period unit 61 is equal to the sum of the odd number of first pixel periods P1, two touch period units 61 adjacent in the first direction Y can be completely connected, thereby improving the touch performance.

Further, referring to fig. 13, the design method of the touch electrode 6 may further include: the touch cycle unit 61 is designed as an axisymmetric pattern, and the symmetry axis L2 is a central axis of the touch cycle unit 61 and is parallel to the first direction Y.

In the case that the touch periodic unit 61 is not a symmetrical pattern, the touch electrodes of two adjacent rows are not completely identical, and there is still a small difference between the capacitance values of the adjacent rows. After the touch periodic unit 61 is designed into an axisymmetric pattern, there is no difference in capacitance between adjacent rows.

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 to perform, and/or one step decomposed into multiple steps to perform, etc.

Based on the same inventive concept, the exemplary embodiments of the present disclosure provide a touch substrate, and referring to fig. 5 and 10-13, the touch substrate may include a touch electrode 6, and the touch electrode 6 may be designed by the design method described in any one of the above; the touch electrode 6 may include a plurality of touch period units 61 arranged in an array, a first edge of the touch period units 61 extends along a first direction Y, a second edge 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 periods P1 are pixel periods of pixels arranged along the first direction Y.

In some example embodiments of the present disclosure, a 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 may be provided at one side of the base layer 1; the first conductive layer group 2 may be formed by deposition and photolithography, 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 via hole is arranged on the interlayer dielectric layer 3; the interlayer dielectric material layer may be formed by a deposition process, and then the via hole and the interlayer dielectric layer 3 may be formed by performing a photolithography process on the interlayer dielectric material layer. The interlayer dielectric layer 3 may be made of silicon nitride (SiNx) to perform an insulating function.

The second conductive layer group 4 is arranged on one side of the interlayer dielectric layer 3 far away from the substrate layer 1, 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 conductive layer group 4 may be connected to the first conductive layer group 2 through a via hole on the interlayer dielectric layer 3.

The insulating layer 5 is disposed on one side of the second conductive layer group 4 away from the base layer 1, and the insulating layer 5 may be 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 here.

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 at the periphery of the touch electrode 6.

The second conductive layer group 4 may include a touch electrode body 41, where the touch electrode body 41 is connected to the bridge 21 through a via, and the touch electrode body 41 and the bridge 21 form the touch electrode 6. The touch electrode main body 41 is connected to the first touch signal line and the second touch signal line through the via hole. 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 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 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 period units 61 arranged in an array. The touch period unit 61 may include a touch driving electrode 611 and a touch sensing electrode 612, the touch driving electrode 611 extending along a first direction Y, and the touch sensing electrode 612 extending along a 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 period units 61 are connected as one touch driving electrode 611 of the integrated touch electrode 6.

The touch sensing electrode 612 includes two parts symmetrically disposed about the symmetry axis L2, and the two parts are directly connected together, i.e. the two parts are directly connected together on the second conductive layer group. The touch sensing electrodes 612 of adjacent touch cycle units 61 are connected as a unit to form the touch sensing electrode 612 of the touch electrode 6.

A supplementary electrode 613 is further provided in the touch driving electrode 611 and the touch sensing electrode 612, 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 extending along a first direction Y and a second side line extending along a second direction X, the first direction Y being perpendicular to the second direction X. The length of the first side line is equal to the sum of the odd number of first pixel periods P1, and the first pixel period P1 is a pixel period of pixels arranged in the first direction Y. The length of the second side line is equal to the sum of an even number of second pixel periods P2, and the second pixel period P2 is a pixel period of 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 touch cycle units 61 adjacent 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 of two touch cycle units 61 adjacent in the first direction Y. The arrangement can ensure that two adjacent touch control period units 61 in the first direction Y are identical, and can ensure that two adjacent touch control period units 61 in the first direction Y can be connected completely, so that touch control performance is improved.

Referring to fig. 13, the touch cycle unit 61 may be in an axisymmetric pattern, and a symmetry axis L2 is a central axis of the touch cycle unit 61 and is parallel to the first direction Y. If the touch periodic unit 61 is not axisymmetric, the touch sensing electrodes 612 of two adjacent rows are not completely identical, and there is still a small difference between the capacitance values of the adjacent rows. After the touch periodic unit 61 is designed into an axisymmetric pattern, there is no difference in capacitance between adjacent rows.

In other example embodiments of the present disclosure, referring to fig. 14, two touch period units 61 adjacent in the first direction Y are offset in the second direction X, and are offset by an odd number of second pixel periods P2, for example, are offset by one second pixel period P2; namely, 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 period units 61 of the even rows is generally identical, the arrangement of the touch period units 61 of the odd rows is generally identical, and the touch period units 61 of the even rows and the touch period units 61 of the odd rows are shifted 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 is also ensured that, in the case where the length of the first edge of the touch period unit 61 is equal to the sum of the odd number of first pixel periods P1, two touch period units 61 adjacent in the first direction Y can be completely connected, thereby improving the touch performance.

The two adjacent touch control period units 61 in the second direction X are the same, that is, the two adjacent touch control period units 61 in the second direction X are obtained by translating the same touch control period unit 61; it is possible to ensure that two adjacent touch cycle units 61 in the second direction X are identical, thereby improving touch performance.

In other example embodiments of the present disclosure, the length of the first edge is equal to the sum of the odd number of first pixel periods P1. The length of the second side line is also equal to the sum of the odd number of second pixel periods P2. In this case, the two touch cycle 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 of the two touch cycle units 61 adjacent in the first direction Y. The two adjacent touch cycle units 61 in the second direction X are symmetrically arranged with respect to a second symmetry axis, which is a common edge of the two adjacent touch cycle units 61 in the second direction X. The arrangement can ensure that two adjacent touch control period units 61 in the first direction Y and the second direction X are identical, and can ensure that two adjacent touch control period units 61 in the first direction Y and the second direction X can be connected completely, so that touch control performance is improved.

Based on the same inventive concept, the exemplary embodiments of the present disclosure provide a display device, which may include the touch substrate as described in any one of the above. The specific structure of the touch substrate has been described in detail above, and therefore, will not be described here again.

The display device may include a display panel, a package layer group disposed on one side of the display panel, and a touch substrate disposed on one side of the package layer group away from the display panel.

The specific type of the display device is not particularly limited, and the type of the display device commonly used in the art may be, for example, a mobile device such as a mobile phone, a wearable device such as a watch, a VR device, etc., and those skilled in the art may select the display device accordingly according to the specific application of the display device, which is not described herein again.

It should be noted that, the display device includes other necessary components and components besides the touch display panel, for example, a display, specifically, a housing, a circuit board, a power cord, etc., and those skilled in the art can correspondingly supplement the components and components according to specific usage requirements of the display device, which is not described herein.

Compared with the prior art, the display device provided by the exemplary embodiment of the present invention has the same beneficial effects as the touch substrate provided by the foregoing exemplary embodiment, and will not be described herein.

In the present specification, "parallel" means a state in which two straight lines form an angle of-10 ° or more and 10 ° or less, and therefore, a state in which the angle is-5 ° or more and 5 ° or less is also included. The term "vertical" refers to a state in which an angle formed by two straight lines is 80 ° or more and 100 ° or less, and thus 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 adaptations, 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. The design method of the touch electrode comprises a plurality of touch periodic units distributed in an array, and is characterized by comprising the following steps:

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

3. The method of claim 1, wherein the first target side length is equal to a sum of an odd number of first pixel periods, the method further comprising:

4. The method of claim 1, wherein the first target side length is equal to a sum of an odd number of first pixel periods, the method further comprising:

5. The method for designing a touch electrode according to claim 3 or 4, further comprising:

6. The method for designing a 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 according to claim 7, wherein two of the touch periodic units adjacent in the first direction are symmetrically arranged with respect to a first symmetry axis, the first symmetry axis being a common edge of two of the touch periodic units adjacent in the first direction.

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

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

11. The touch substrate according to 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 of the touch periodic units adjacent in the second direction are identical.

13. The touch substrate according to claim 7, wherein the duty ratio of the touch periodic units located at the edge of the display area is 95% or more, or 5% or less.

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

A base layer;

15. The touch substrate of claim 14, wherein the first and second groups 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 and third conductive layers.

16. The touch substrate according to 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 one of claims 6 to 16.