Touch display substrate and display device

Abstract

The present disclosure provides a touch display substrate and a display device. A display region of the touch display substrate comprises a first region and a second region, the second region comprises a middle region of the touch display substrate, and the first region comprises an edge region located at the periphery of the middle region. The touch display substrate comprises a display substrate, and a touch layer located on a display side of the display substrate, wherein the orthographic projection of the touch layer on the display substrate comprises a plurality of touch units distributed in an array, and each touch unit has a touch pattern. In a touch region of one touch unit in the first region, the ratio of the area of a touch-recognizable effective touch pattern to the total area of the touch region is a first effective pattern density P1, and in a touch region of one touch unit in the second region, the ratio of the area of a touch-recognizable effective touch pattern to the total area of the touch region is a second effective pattern density P2, wherein P1>P2. The touch display substrate and the display device provided by the present disclosure can improve the touch performance of touch display products.

Description

Touch display substrate and display device TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, and in particular to a touch display substrate and a display device. BACKGROUND

[0002] With the development of touch technology, in addition to the common finger touch, the capacitive touch screen can also be touched by a touch pen. The touch pen is divided into a passive pen and an active pen. The active pen has a smaller pen head and has functions of pen pressure, hovering touch, button, etc., and has a wider application scenario and prospect than the passive pen.

[0003] With the development of active pen technology, more and more touch screens, such as electronic products with touch screens, such as mobile phones, notebook computers, tablet computers, etc., are equipped with active pens, and higher requirements are put forward for various performances of the active pen. However, in the related art, the accuracy and linearity of the touch screen using the active pen for touch control are poor, which affects the touch control performance.

[0004] SUMMARY

[0005] The embodiments of the present disclosure provide a touch display substrate and a display device, which can improve the touch control performance of the touch display product.

[0006] The technical solutions provided by the embodiments of the present disclosure are as follows:

[0007] In a first aspect, the embodiments of the present disclosure provide a touch display substrate, a display area of the touch display substrate comprising a first area and a second area, the second area comprising a middle area of the touch display substrate, and the first area comprising an edge area located at a periphery of the middle area; the touch display substrate comprising:

[0008] a display substrate; and

[0009] a touch layer located at a display side of the display substrate, a normal projection of the touch layer on the display substrate comprising a plurality of touch units arranged in an array, each of the touch units having a touch pattern;

[0010] In the first area, the proportion of the effective touch pattern area capable of being recognized by touch in the total area of the touch area of one touch unit is a first effective pattern density P1.

[0011] In the second area, the proportion of the effective touch pattern area capable of being recognized by touch in the total area of the touch area of one touch unit is a second effective pattern density P2; P1 is greater than P2.

[0012] Exemplarily, the first region comprises at least two edge sub-regions arranged in sequence along a direction from the edge region to the middle region, and the at least two edge sub-regions gradually decrease in the first effective pattern density of the touch unit along the direction from the edge region to the middle region.

[0013] Exemplarily, the first region comprises a first edge sub-region and a second edge sub-region arranged in sequence along a direction from the edge region to the middle region, wherein,

[0014] The middle region has a first dimension x along a second direction and a second dimension y along a first direction, and the first direction intersects the second direction;

[0015] Along the second direction, the first edge sub-region has a first width x1 and a second width x2 on opposite sides of the middle region, respectively; along the first direction, the second edge sub-region has a third width y1 and a fourth width y2 on opposite sides of the middle region, respectively;

[0016] Along the second direction, the second edge sub-region has a fifth width x3 and a sixth width x4 on opposite sides of the middle region, respectively; along the first direction, the first edge sub-region has a seventh width y3 and an eighth width y4 on opposite sides of the middle region, respectively;

[0017] Wherein, 0.01≤x1 / x≤5, 0.01≤x2 / x≤5, 0.01≤x3 / x≤5, 0.01≤x4 / x≤5, 0.01≤y1 / y≤5, 0.01≤y2 / y≤5, 0.01≤y3 / y≤5, 0.01≤y4 / y≤5.

[0018] Exemplarily, the ratio of P2 to P1 is 0.2-0.8.

[0019] Exemplarily, the touch unit comprises a first touch metal layer and a second touch metal layer, each of the first touch metal layer and the second touch metal layer comprises a plurality of grid lines in a mesh shape intersecting along a first direction and along a second direction;

[0020] The plurality of grid lines of the first touch metal layer comprises a plurality of first through lines, the first through lines penetrate the corresponding touch unit along the first direction; the plurality of grid lines of the second touch metal layer comprises a plurality of second through lines, the second through lines penetrate the corresponding touch unit along the second direction;

[0021] The one of the first through lines and the second through lines is used for transmitting a touch transmission signal, and the other one is used for transmitting a touch reception signal; the orthographic projections of the first through lines and the second through lines on the display substrate overlap with each other to form a plurality of bridge points.

[0022] Exemplarily, the number of bridge points of the touch unit in the first region is the same as the number of bridge points of the touch unit in the second region.

[0023] Exemplarily, the plurality of grid lines of the first touch metal layer includes M1 first grid lines extending along the first direction and N1 second grid lines extending along the second direction;

[0024] The plurality of grid lines of the second touch metal layer includes M2 third grid lines extending along the first direction and N2 fourth grid lines extending along the second direction;

[0025] The M1 first grid lines and the M2 third grid lines are arranged alternately along the second direction,

[0026] The N1 second grid lines and the N2 fourth grid lines are arranged alternately along the first direction, so that the orthographic projection of the touch unit on the display substrate has (M1+M2)×(N1+N2) grid nodes;

[0027] The M1 first grid lines include m1 first through lines, and the N2 fourth grid lines include n1 second through lines, m1≤M1, n1≤N2, and M1, M2, N1, and N2 are positive integers greater than or equal to 1.

[0028] Exemplarily, at least one of the first touch metal layer and the second touch metal layer further includes a plurality of non-through lines having broken openings;

[0029] The (M1+M2)×(N1+N2) grid nodes include:

[0030] a plurality of first grid nodes formed by the intersection of grid lines in the same layer of metal grid layers, and

[0031] a plurality of second grid nodes formed by the intersection of grid lines in different layers of metal grid layers;

[0032] The plurality of second grid nodes include m1×n1 bridge points and non-overlapping nodes other than the bridge points; for any non-overlapping node, at least one of the two grid lines intersecting to form the non-overlapping node is a non-through line, and the at least one non-through line is provided with a broken opening at least at the non-overlapping node.

[0033] Exemplarily, the effective touch pattern of the first touch metal layer includes a plurality of first effective patterns, one of the first effective patterns corresponding to at least one of the first through lines, the first effective pattern including a first stem pattern formed by the corresponding first through line and a first branch pattern connected to the first stem pattern, the first branch pattern including at least a first line segment formed by a non-through line in the first touch metal layer being disconnected, the first line segment being a line segment intersecting the first stem pattern to form the first grid node;

[0034] The effective touch pattern of the second touch metal layer includes a plurality of second effective patterns, one of the second effective patterns corresponding to at least one of the second through lines, the second effective pattern including a second stem pattern formed by the corresponding second through line and a second branch pattern connected to the second stem pattern, the second branch pattern including at least a second line segment formed by a non-through line in the second touch metal layer being disconnected, the second line segment being a line segment intersecting the second stem pattern to form the first grid node.

[0035] Exemplarily, in the first touch metal layer, at least part of the first effective patterns further include a plurality of first cross-line units formed by non-through lines in the first touch metal layer being disconnected, the first cross-line unit including a third line segment and a fourth line segment, the third line segment being on the same non-through line as the first line segment or being arranged in parallel, the fourth line segment intersecting the third line segment to form at least one of the first grid nodes;

[0036] In the second touch metal layer, at least part of the second effective patterns further include a plurality of second cross-line units formed by non-through lines in the second touch metal layer being disconnected, the second cross-line unit including a fifth line segment and a sixth line segment intersecting to form at least one of the first grid nodes, the fifth line segment being on the same non-through line as the second line segment or being arranged in parallel, the fifth line segment intersecting the sixth line segment to form at least one of the first grid nodes.

[0037] Exemplarily, the number of the first cross-line units in the touch unit of the first region is greater than the number of the first cross-line units in the touch unit of the second region, so that the first effective pattern density P1 of the touch unit in the first region is greater than the second effective pattern density P2 of the touch unit in the second region; and / or,

[0038] The number of the second cross-line units in the touch control unit of the first region is greater than the number of the second cross-line units in the touch control unit of the second region, so that a first effective pattern density P1 of the touch control unit in the first region is greater than a second effective pattern density P2 of the touch control unit in the second region.

[0039] Exemplarily, in the first touch metal layer,

[0040] When the number of the first effective patterns is odd, the touch control unit has a first virtual center line extending along the first direction, one of the first effective patterns is a first center effective pattern, and the rest of the first effective patterns are first side effective patterns, the first through lines in the first center effective pattern pass through the first virtual center line, the first through lines in the first side effective patterns are mirror symmetric about the first virtual center line, and the first side effective patterns on the same side of the first virtual center line have the same pattern;

[0041] When the number of the first effective patterns is even, the touch control unit has a first virtual center line extending along the first direction, a number of the first effective patterns are distributed on opposite sides of the first virtual center line along the second direction, and the two first effective patterns closest to the first virtual center line are a second center effective pattern and a third center effective pattern respectively, and the rest of the first effective patterns are second side effective patterns, wherein the second center effective pattern and the third center effective pattern have the same pattern, the first through lines in a number of the second side effective patterns are mirror symmetric about the first virtual center line, and the second side effective patterns on the same side of the first virtual center line have the same pattern.

[0042] Exemplarily, in the second touch metal layer,

[0043] When the number of the second effective patterns is odd, the touch control unit has a second virtual center line extending along the second direction, one of the second effective patterns is a fourth center effective pattern, and the rest of the second effective patterns are fourth side effective patterns, the second through lines in the fourth center effective pattern pass through the second virtual center line, the second through lines in the fourth side effective patterns are mirror symmetric about the second virtual center line, and the fourth side effective patterns on the same side of the second virtual center line have the same pattern;

[0044] When the number of the second effective patterns is even, the touch unit has a second virtual center line extending along the second direction, a plurality of the second effective patterns are distributed on opposite sides of the second virtual center line along the first direction, and two second effective patterns closest to the second virtual center line are a fifth center effective pattern and a sixth center effective pattern, respectively, the remaining second effective patterns being fifth side effective patterns, wherein the fifth center effective pattern and the sixth center effective pattern have the same pattern, the second through lines in the plurality of fifth side effective patterns are mirror-symmetrical about the second virtual center line, and the patterns of the fifth side effective patterns on the same side of the second virtual center line are the same.

[0045] Illustratively, at the non-overlapping node, one of the two grid lines forming the non-overlapping node continuously and uninterruptedly extends at the break opening, the other grid line being a non-through line, and the non-through line is broken by the break opening to form two free ends; wherein a virtual optical compensation line is further provided at the break opening, the orthogonal projection of the virtual optical compensation line on the display substrate is located between the two free ends, and a separation distance is maintained between the virtual optical compensation line and the two free ends, respectively, and the virtual optical compensation line is arranged to overlap the grid line continuously and uninterruptedly extending at the non-overlapping node.

[0046] Illustratively, the virtual optical compensation line and the non-through line forming the break opening at the non-overlapping node are arranged to be of the same layer and the same material, and the difference between the width of the virtual optical compensation line along the width direction of the non-through line and the line width of the non-through line is within a threshold value.

[0047] Illustratively, the separation distance has a size d2 along the extension direction of the corresponding non-through line: 2μm≤d2≤50μm.

[0048] Illustratively, the break opening has a size d1 along the extension direction of the non-through line on which the break opening is located: 3μm≤d1≤80μm.

[0049] Illustratively, the M1 first grid lines in the first touch metal layer are arranged in sequence along the second direction, and the two first grid lines located at the outermost periphery are a first peripheral grid line and a second peripheral grid line, respectively, wherein the first peripheral grid line and the second peripheral grid line are both virtual grid lines in a floating state, and at least one of the first peripheral grid line and the second peripheral grid line is configured to have at least one break opening in the first direction.

[0050] Illustratively, the line width of at least part of the grid lines in the first region is greater than the line width of at least part of the grid lines in the second region.

[0051] Exemplarily, the grid line line width of the first touch control metal layer in the first region is a, the grid line line width of the first touch control metal layer in the second region is c, and a>c; and / or, the grid line line width of the second touch control metal layer in the first region is b, the grid line line width of the second touch control metal layer in the second region is d, and b>d.

[0052] Exemplarily, 2μm≤a≤10μm, 2μm≤b≤10μm, 2μm≤c≤6μm, and 2μm≤d≤6μm.

[0053] In a second aspect, the embodiments of the present disclosure provide a display device including the touch control display substrate as described above.

[0054] The embodiments of the present disclosure have the following beneficial effects:

[0055] In the above scheme, the touch control patterns of the touch control units are designed differently in different regions of the touch control display substrate, so that the effective pattern densities of the first region and the second region are different, the first effective pattern density P1 of the first region is greater than the second effective pattern density P2 of the second region, which can make the signal amount (AES signal amount) of the active pen and the touch control display substrate different when the active pen passes through different regions, thereby improving the touch control performance of the touch control display substrate. For example, the display noise signal of the first region at a predetermined working frequency can be greater than the display noise signal of the second region at the predetermined working frequency, so that the region with a greater display noise signal has a greater effective pattern density, which can make the AES signal at the position with a greater display noise signal greater than the display noise signal at the position, thereby improving the touch control performance of the touch control display substrate and the hover capability of the active pen. BRIEF DESCRIPTION OF DRAWINGS

[0056] FIG. 1 shows a schematic diagram of a display area of a touch control display substrate provided in some embodiments of the present disclosure;

[0057] FIG. 2 shows a schematic diagram of a display area of a touch control display substrate provided in some embodiments of the present disclosure;

[0058] FIG. 3 shows a schematic diagram of the change curves of the display noise signal and the AES signal amount at different positions on a display screen in the related art, wherein the curve a' represents the change curve of the display noise signal, and the curve b' represents the change curve of the AES signal amount;

[0059] FIG. 4 shows a schematic diagram of the change curves of the display noise signal and the AES signal amount at different positions on a touch control display substrate provided in the embodiments of the present disclosure, wherein the curve c' represents the change curve of the display noise signal, and the curve d' represents the change curve of the AES signal amount;

[0060] Figure 5 shows one of the schematic diagrams of the grid pattern of the touch unit of the touch display substrate provided by the embodiment of the present disclosure at the first area;

[0061] Figure 6 shows a schematic diagram of the pattern of the first touch metal layer in the first area in Figure 5;

[0062] Figure 7 shows a schematic diagram of the pattern of the second touch metal layer in the first area in Figure 5;

[0063] Figure 8 shows a schematic diagram of the grid pattern of the touch unit of the touch display substrate provided by the embodiment of the present disclosure at the second area;

[0064] Figure 9 shows one of the schematic diagrams of the pattern of the first touch metal layer in the second area in Figure 8;

[0065] Figure 10 shows one of the schematic diagrams of the pattern of the second touch metal layer in the second area in Figure 8;

[0066] Figure 11 shows the second schematic diagram of the pattern of the first touch metal layer in the first area;

[0067] Figure 12 shows the second schematic diagram of the pattern of the second touch metal layer in the first area;

[0068] Figure 13 shows one of the partial enlarged views of the grid pattern in the first area;

[0069] Figure 14 shows one of the partial enlarged views of the grid pattern in the second area;

[0070] Figure 15 shows the second partial enlarged view of the grid pattern in the first area;

[0071] Figure 16 shows the second partial enlarged view of the grid pattern in the second area;

[0072] Figure 17 shows one of the partial enlarged views of Q in Figure 5;

[0073] Figure 18 shows the second partial enlarged view of Q in Figure 5;

[0074] Figure 19 shows one of the partial enlarged views of E in Figure 17;

[0075] Figure 20 shows the second partial enlarged view of E in Figure 17;

[0076] Figure 21 shows a schematic diagram of the cross section along A-A' in Figure 20;

[0077] Figure 22 shows a schematic diagram of the cross section along B-B' in Figure 20;

[0078] Figure 23 shows the third partial enlarged view of E in Figure 17;

[0079] Figure 24 shows the fourth partial enlarged view of E in Figure 17;

[0080] FIG. 25 shows a second schematic view of a grid pattern of touch units in a first region of a touch display substrate according to some embodiments of the present disclosure;

[0081] FIG. 26 shows a partial enlarged view of R1 in FIG. 25;

[0082] FIG. 27 shows a partial enlarged view of R2 in FIG. 25;

[0083] FIG. 28 shows a schematic view of 3x3 touch units in a first region of a touch display substrate according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0084] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the following will be combined with the accompanying drawings for the embodiments of the present disclosure to clearly and completely describe the technical solutions of the embodiments of the present disclosure. Obviously, the described embodiments are some but not all of the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of the present disclosure.

[0085] Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall have the ordinary meaning as understood by a person of ordinary skill in the art to which the present disclosure belongs. The terms "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are used to distinguish different components. Similarly, the terms "one", "a" or "the" and similar terms do not denote quantity limitation, but mean that there is at least one. The terms "include", "comprise" and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.

[0086] The features "parallel", "perpendicular" and "same" and the like used in the embodiments of the present disclosure include the strictly "parallel", "perpendicular", "same" and the like, and "approximately parallel", "approximately perpendicular", "approximately same" and the like with a certain tolerance, which, considering the measurement and the tolerance related to the measurement of a specific value (for example, the limitation of a measurement system), represents the acceptable deviation range for the specific value determined by a person of ordinary skill in the art. For example, "approximately" can mean within one or more standard deviations, or within 3% or 5% of the value.

[0087] Further, in this document, unless otherwise indicated, the terms "substantially," "essentially," "approximately," and "about” are used to describe and account for small variations. When used in connection with an event or circumstance, these terms can cover instances in which the event or circumstance occurs precisely as well as instances in which the event or circumstance occurs approximately or within a competitive range. For example, when used in connection with a numerical value, these terms can encompass a range of variation less than or equal to 10% of the numerical value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to ±3%, less than or equal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%, less than or equal to ±0.1%, less than or equal to ±0.05%. The term "substantially coplanar” can refer to two surfaces being aligned along the same plane within the micrometer range, for example, within 40 pm, 30 pm, 20 pm, 10 pm, or 1 pm.

[0088] It should be understood that, in the exemplary embodiments of the present disclosure, when a layer or element is referred to as being on another layer or substrate, it can be that the layer or element is directly on the other layer or substrate, or there can be an intermediate layer between the layer or element and the other layer or substrate. "A and B are disposed in the same layer” means that A and B are formed by the same film forming process for forming a film layer of a specific pattern, and are formed by a one-time patterning process using the same mask plate.

[0089] Before the touch display substrate and display device provided by the embodiments of the present disclosure are described in detail, the related art is described as follows:

[0090] An active pen refers to a stylus with built-in electronic components that can interact with touch screen devices (such as tablets or smartphones) through electromagnetic or capacitive technology. The active pen has a small pen tip and has functions such as pen pressure, hover touch, buttons, etc., and has a wider range of application scenarios and prospects than passive pens.

[0091] However, in the related art, the accuracy and linearity of the touch screen using the active pen for touch control are poor, which affects the touch control performance of the active pen, for example, affecting the Hover (hovering) capability of the active pen.

[0092] In some touch products, the display noise signal is greater than the AES signal in some areas of the display area, which causes the hover capability of the active pen to be insufficient in these areas. Since the larger the load capacitance C of the touch pattern, the greater the coupling effect of the display noise signal on the touch pattern, if the touch patterns at different positions on the display screen are designed the same, the AES signal amount of the touch pattern to the active pen is fixed, which will cause the display noise signal to be greater than the AES signal amount in the area where the display noise signal is large, and the problem of insufficient hover capability of the active pen.

[0093] The applicant of the present disclosure finds that one of the reasons for the above problems is that the AES (Active Electromagnetic Stylus) signal quantity of the active pen refers to the signal quantity used by the active pen when communicating with the display screen. The AES signal quantity is used to transmit various information of the pen, including position, pressure, tilt angle, etc. However, in some areas of the display screen, the display noise signal of the active pen is higher than the AES signal quantity of the active pen, which causes the problem that the hover capability of the active pen in these areas does not meet the specifications, affecting the touch performance.

[0094] To improve the above problems, the present disclosure provides a touch display substrate and a display device, which can improve the touch performance.

[0095] The touch display substrate provided by the present disclosure can be touched based on the active pen, but the application scenario of the touch display substrate is not limited thereto. For example, the touch display substrate can also be applied to a finger touch scenario.

[0096] Referring to FIG. 1, the touch display substrate 10 provided by the present disclosure includes a display area AA, which includes a first area AA1 and a second area AA2. The first area AA1 can be located at least one side of the second area AA2. For example, the display noise signal of the first area AA1 in a predetermined working frequency range is greater than the display noise signal of the second area AA2 in the predetermined working frequency range. For example, the predetermined working frequency range can be the working frequency range of the active pen, for example, 25k±2.5kHz.

[0097] As shown in FIGS. 21 and 22, the touch display substrate 10 includes a display substrate 100 and a touch layer 200 located on the display side of the display substrate 100.

[0098] Referring to FIGS. 5 and 8, the touch layer 200 is located on the display side of the display substrate 100. The orthographic projection of the touch layer 200 on the display substrate 100 includes a plurality of touch units D arranged in an array. Each touch unit D has a touch pattern. In the first area AA1, the ratio of the effective touch pattern area capable of being touch-recognized in the touch area of one touch unit D to the total area of the touch area is a first effective pattern density P1. In the second area AA2, the ratio of the effective touch pattern area capable of being touch-recognized in the touch area of one touch unit D to the total area of the touch area is a second effective pattern density P2. P1 is greater than P2.

[0099] It should be noted that the effective pattern density of the touch unit D can refer to the ratio of the touch pattern area capable of being touch-recognized in the touch area of one touch unit D to the total area of the touch area.

[0100] Specifically, the touch patterns in the first region AA1 and the second region AA2 can include effective touch patterns and virtual touch patterns. The virtual touch pattern refers to a pattern in a floating state, that is, not electrically connected to other structures or not receiving any electrical signals. The effective pattern densities of the first region AA1 and the second region AA2 are different, which can mean that the effective touch patterns and the virtual touch patterns in the first region AA1 and the second region AA2 are different, or the line widths of the effective touch patterns in the first region AA1 and the second region AA2 are different, and the like. In the above scheme, the touch patterns of the touch units D are designed differently in different regions of the touch display substrate 10, so that the effective pattern densities of the different regions are different, and the first effective pattern density P1 of the first region is greater than the second effective pattern density P2 of the second region. In this way, when the active pen passes through different regions, the signal amount (AES signal amount) between the touch display substrate and the active pen also differs, thereby improving the touch performance of the touch display substrate. For example, the display noise signal of the first region at a predetermined working frequency can be greater than the display noise signal of the second region at a predetermined working frequency. In this way, when the active pen passes through different regions, the signal amount (AES signal amount) between the touch display substrate 10 and the active pen also differs accordingly. Since the region with a greater display noise signal has a greater effective pattern density, the AES signal at the position with a greater display noise signal is greater than the display noise signal at the position, thereby improving the touch performance of the touch display substrate 10 and improving the hover capability of the active pen.

[0101] It should be noted that in the touch display substrate provided by the embodiments of the present disclosure, the effective pattern densities of the first region AA1 and the second region AA2 are designed differently. For example, in the touch display screen in the related art, the effective pattern density is P0. The effective pattern density of the second region AA2 can be reduced, that is, P2

[0102] Figure 3 shows a curve diagram of the display noise signal and the AES signal amount at different positions on the display screen in the related art, wherein curve a' represents the display noise signal, and curve b' represents the AES signal amount. As shown in Figure 3, in some touch display substrates 10, the display noise signal at the edge position of the display area AA of the touch display substrate 10 is greater than the AES signal amount, which results in insufficient hover capability of the active pen at the edge position of the display area AA.

[0103] Therefore, as some exemplary embodiments of the present disclosure, as shown in Figure 1, the second area AA2 can include the middle area of the touch display substrate 10, and the first area AA1 can include the edge area at the periphery of the middle area. In this way, by differentiating the touch patterns of the edge area and the middle area of the touch display substrate 10, so that the effective pattern density of the touch pattern in the edge area is greater than the effective pattern density of the touch pattern in the middle area, the AES signal amount of the active pen passing through the edge area of the touch display substrate 10 can be greater than the display noise signal of the edge area, so as to improve the hover capability of the active pen.

[0104] Figure 4 shows a curve diagram of the display noise signal and the AES signal amount at different positions on the touch display substrate 10 provided by the embodiments of the present disclosure, wherein curve c' represents the display noise signal, and curve d' represents the AES signal amount. As shown in Figure 4, the AES signal amount of the middle area and the edge area is greater than the display noise signal, which improves the hover capability of the active pen.

[0105] It should be understood that the first area AA1 is not limited to the edge area of the touch display substrate 10, and the second area AA2 is not limited to the middle area of the touch display substrate 10. The first area AA1 and the second area AA2 can be divided based on the variation trend of the display noise signal in the predetermined working frequency range in the actual product.

[0106] As some exemplary embodiments of the present disclosure, as shown in Figure 1, the first area AA1 surrounds the periphery of the second area AA2, and the first area AA1 can include only one area.

[0107] As another exemplary embodiment of the present disclosure, as shown in FIG. 2, the first region AA1 is divided into at least two edge sub-regions AA1i arranged in sequence along a direction from the edge region to the middle region, i.e., along a direction from the first region AA1 to the second region AA2. In other words, the first region AA1 is divided into a plurality of edge sub-regions AA1i, and the at least two edge sub-regions AA1i gradually decrease in the first effective pattern density P1 of the touch unit D along the direction from the edge region to the middle region.

[0108] In the above scheme, as shown in FIG. 3, in some embodiments, the variation trend of the display noise signal presents a trend of gradually changing from the edge to the middle of the display area AA, and therefore, the touch patterns at different positions of the touch display substrate 10 can be designed to gradually change according to the above variation trend of the display noise signal, so that the effective pattern density of the touch unit D of the display area AA gradually changes in a stepped manner from the edge to the middle.

[0109] It should be noted that in other embodiments, the variation trend of the display noise signal in the touch display substrate 10 can be different, and at this time, different regions can be reasonably divided according to the above variation trend of the display noise signal, and the effective pattern density of the touch pattern in the region where the display noise signal is greater is greater. For example, the number of edge sub-regions AA1i can be 2-100.

[0110] As an exemplary embodiment, as shown in FIG. 2, the first region AA1 includes a first edge sub-region AA11 and a second edge sub-region AA12 arranged in sequence along a direction from the edge region to the middle region, and the effective pattern density of the second edge sub-region AA12 is between the first edge sub-region AA11 and the second region AA2.

[0111] Wherein, the middle region has a first size x along a second direction X and a second size y along a first direction Y, and the first direction Y intersects the second direction X; along the second direction X, the first edge sub-region AA11 has a first width x1 and a second width x2 on opposite sides of the middle region, and the first width x1 and the second width x2 can be the same or different.

[0112] Along the first direction Y, the second edge sub-region AA12 has a third width y1 and a fourth width y2 on opposite sides of the middle region, and the third width y1 and the fourth width y2 can be the same or different.

[0113] Along the second direction X, the second edge sub-region AA12 has a fifth width x3 and a sixth width x4 on opposite sides of the middle region, respectively, which can be the same or different.

[0114] Along the first direction Y, the first edge sub-region AA11 has a seventh width y3 and an eighth width y4 on opposite sides of the middle region, respectively, which can be the same or different.

[0115] As an exemplary embodiment, 0.01≤x1 / x≤5, 0.01≤x2 / x≤5, 0.01≤x3 / x≤5, 0.01≤x4 / x≤5, 0.01≤y1 / y≤5, 0.01≤y2 / y≤5, 0.01≤y3 / y≤5, 0.01≤y4 / y≤5.

[0116] It should be noted that the specific values and proportional relationships of x, x1, x2, x3, x4, y, y1, y2, y3, y4 can be selected according to the change trend of the display noise signal in the touch display substrate, so that the AES signal amount at different regions is greater than the display noise signal at different regions.

[0117] It should be understood that the above is only an example, and the number and size of the edge sub-regions AA1i divided by the first region AA1 are not limited thereto.

[0118] In addition, as an exemplary embodiment, the ratio of P2 to P1 is 0.2-0.8. That is, the effective pattern density P2 of the second region AA2 is 20%-80% of the effective pattern density P1 of the second region AA2. If the ratio of P2 to P1 is too small, in other words, the value of P2 is too small, it may affect the touch sensitivity and other performance of the first region AA1; if the ratio of P2 to P1, it may not match the display noise difference between different regions. Specifically, in actual application, the size and structure of the touch display substrate 10 can be selected in combination with the specific change of the display noise signal.

[0119] In addition, as an exemplary embodiment, as shown in FIGS. 5-12, the touch unit D includes a first touch metal layer TMA and a second touch metal layer TMB. Each of the first touch metal layer TMA and the second touch metal layer TMB includes a plurality of grid lines DL intersecting in a mesh shape along the first direction Y and along the second direction X, that is, either of the first touch metal layer TMA and the second touch metal layer TMB has a grid pattern.

[0120] Please refer to FIG. 6 and FIG. 9, the plurality of grid lines DL of the first touch metal layer TMA includes a plurality of first through lines 210, the first through lines 210 pass through the corresponding touch unit D along the first direction Y; please refer to FIG. 7 and FIG. 10, the plurality of grid lines DL of the second touch metal layer TMB includes a plurality of second through lines 220, the second through lines 220 pass through the corresponding touch unit D along the second direction X.

[0121] Among them, one of the first through line 210 and the second through line 220 is used to transmit touch sending signal (that is, as TX channel), the other is used to transmit touch receiving signal (that is, as RX channel).

[0122] Please refer to FIG. 5 and FIG. 8, a plurality of first through lines 210 and a plurality of second through lines 220 are overlapped with each other in the orthographic projection on the display substrate 100, to form a plurality of bridge points 230. For example, the first touch metal layer TMA includes m1 first through lines 210, the second touch metal layer TMB includes n1 second through lines 220, m1 and n1 are both positive integers greater than or equal to 1, and the number of bridge points 230 formed is m1 x n1.

[0123] In the above scheme, the touch layer 200 of the touch display substrate 10 at least includes the first touch metal layer TMA and the second touch metal layer TMB, each metal grid layer includes a plurality of grid lines DL which are crossed in a mesh structure along the first direction Y and the second direction X, the plurality of grid lines DL in the first touch metal layer TMA includes a plurality of first through lines 210, the second touch metal layer TMB has a plurality of first through lines 210, the extension direction of the first through line 210 and the second through line 220 is crossed, and the orthographic projection on the display substrate 100 is overlapped with each other, and the overlapping area of one first through line 210 and one second through line 220 forms a bridge point 230; and the first touch metal layer TMA and the second touch metal layer TMB are insulated from each other, one of the first through line 210 and the second through line 220 is used to transmit the receiving touch signal, and the other is used to transmit the sending touch signal. In this way, two kinds of touch signals are transmitted through the grid pattern of two metal grid layers respectively, which can realize the purpose that the signal lines of two kinds of touch signals are relatively uniform and dense in the touch unit D, thereby increasing the AES signal amount when the active pen passes through the touch unit D; at the same time, since the grid pattern of two kinds of touch signals is relatively uniform and dense in the touch unit D, the signal amount is the same or relatively close when the active pen passes through different areas in the touch unit D, which improves the touch accuracy, sensitivity and linearity of the active pen.

[0124] As an exemplary embodiment, the first through-lines 210 in the first touch metal layer TMA are used for transmitting TX signals, and the second through-lines 220 in the second touch metal layer TMB are used for transmitting RX signals. However, it is not limited thereto.

[0125] As an exemplary embodiment, the number of bridge points 230 of the touch unit D in the first area AA1 can be the same as the number of bridge points 230 of the touch unit D in the second area AA2.

[0126] For example, the number of the first through-lines 210 in the touch unit D in the first area AA1 can be the same as the number of the first through-lines 210 in the touch unit D in the second area AA2; the number of the second through-lines 220 in the touch unit D in the first area AA1 can be the same as the number of the second through-lines 220 in the touch unit D in the second area AA2. The number of bridge points 230 of the touch unit D in the first area AA1 can be the same as the number of bridge points 230 in the second area AA2.

[0127] Since the number of bridge points in the touch pattern of different areas is related to the number of through-lines, and the number of through-lines is related to the resistance of RX channel or TX channel, and also related to the value of the capacitance△cm and the load capacitance between RX channel and TX channel, and further related to the touch effect of the active pen or finger, if the number of bridge points of the first area and the second area is the same, the touch effect of different areas can be more balanced. However, in actual application, in order to balance the parameters such as the amount of AES signal of the active pen and the load capacitance C, the number of bridge points of different areas can also be different.

[0128] FIG. 6 shows a grid pattern of the first touch metal layer TMA in the first area AA1 in some embodiments; and FIG. 9 shows a grid pattern of the second touch metal layer TMB in the second area AA2 in some embodiments.

[0129] As an exemplary embodiment of the present disclosure, please refer to FIG. 6 and FIG. 9, the plurality of grid lines DL of the first touch metal layer TMA includes M1 first grid lines DL1 extending along the first direction Y, and N1 second grid lines DL2 extending along the second direction X; wherein m1 first grid lines DL1 extend through the whole touch unit D along the first direction Y, and are used as m1 first through-lines 210, m1≤M1, and M1 and N1 are positive integers greater than or equal to 1.

[0130] The plurality of grid lines DL of the second touch metal layer TMB includes M2 third grid lines DL3 extending along the first direction Y and N2 fourth grid lines DL4 extending along the second direction X; wherein n1 fourth grid lines DL4 extend through the entire touch unit D along the second direction X and are used as the n1 second through lines 220, wherein n1≤N2, and M2 and N2 are positive integers greater than or equal to 1.

[0131] Please refer to FIGS. 6-9, in the orthographic projection of the touch layer 200 on the display substrate 100, M1 first grid lines DL1 and M2 third grid lines DL3 are arranged alternately along the second direction X. For example, one third grid line DL3 is arranged every other first grid line DL1 along the second direction X. In the orthographic projection of the touch layer 200 on the display substrate 100, N1 second grid lines DL2 and N2 fourth grid lines DL4 are arranged alternately along the first direction Y. For example, one fourth grid line DL4 is arranged every other second grid line DL2 along the first direction Y.

[0132] In the first touch metal layer TMA and the second touch metal layer TMB, the grid lines DL arranged in the same layer cross each other, and the grid lines DL arranged in different layers cross each other, so that the orthographic projection of the touch unit D on the display substrate 100 forms (M1+M2)×(N1+N2) grid nodes S.

[0133] Please refer to FIGS. 6-9, at least one of the first touch metal layer TMA and the second touch metal layer TMB further includes a plurality of non-through lines DL' having a breakage V.

[0134] For example, in the first touch metal layer TMA, M1 first grid lines DL1 further include m2 first non-through lines DL1' having a breakage V, and N1 second grid lines DL2 include n2 second non-through lines DL2' having a breakage V, m2 is a positive integer less than or equal to (M1-m1), and n2 is a positive integer less than or equal to N1.

[0135] As shown in FIGS. 7 and 10, in the second touch metal layer TMB, M2 third grid lines DL3 include m3 third non-through lines DL3' having a breakage V, and N2 fourth grid lines DL4 include n4 fourth non-through lines DL4' having a breakage V, m3 is a positive integer less than or equal to M2, and n4 is a positive integer less than or equal to (N2-n1).

[0136] For example, referring to the first touch metal layer TMA shown in FIG. 6, in either of the first region AA1 and the second region AA2, the N1 second grid lines DL2 in the first touch metal layer TMA further include a third through line DLC and a fourth through line DLD extending along the second direction X, and the first through lines 210 can be connected to the third through line DLC and the fourth through line DLD, respectively. As an example, the third through line DLC and the fourth through line DLD are located at the outermost periphery of the touch unit D and are located at opposite sides of the touch unit D along the first direction Y, respectively.

[0137] For example, referring to the second touch metal layer TMB shown in FIG. 7, in either of the first region AA1 and the second region AA2, the plurality of third grid lines DL3 in the second touch metal layer TMB further include a plurality of fifth through lines DLE extending along the first direction Y, and the second through lines 220 intersect with and are connected to the fifth through lines DLE. As an example, the fifth through lines DLE are uniformly arranged in the touch unit D.

[0138] The (M1+M2)×(N1+N2) grid nodes S include:

[0139] a plurality of first grid nodes S1 formed by the grid lines DL in the same layer of metal grid layers intersecting each other;

[0140] and a plurality of second grid nodes S2 formed by the grid lines DL in different layers of metal grid layers intersecting each other; wherein,

[0141] the plurality of second grid nodes S2 include m1×n1 bridge points 230 and non-overlapping nodes 231 other than the bridge points 230;

[0142] For any non-overlapping node 231, at least one of the two grid lines DL intersecting to form the non-overlapping node 231 is a non-through line DL', and at least one of the non-through lines DL' is provided with a break opening V at least at the non-overlapping node 231.

[0143] In the above scheme, some non-through lines DL' are provided in the grid lines DL in each layer of metal grid layers, and the non-through lines DL' are provided with break openings V. By reasonably arranging the positions of the break openings V, a plurality of non-overlapping nodes 231 can be formed in the grid pattern of the touch unit D, so as to obtain a target effective pattern of the touch unit D, and thus the purpose of differentiating the effective pattern density in the first region AA1 and the second region AA2 is achieved.

[0144] The effective pattern of the touch unit D can be a touch pattern that can be recognized by touch in a certain touch area.

[0145] Referring to FIG. 13, in some embodiments, for some non-overlapping nodes 231, two grid lines DL intersecting to form the non-overlapping node 231 are both non-through lines DL', and the two non-through lines DL' are provided with a breakage opening V at least at the non-overlapping node 231; referring to FIG. 11, in other embodiments, for some non-overlapping nodes 231, two grid lines DL intersecting to form the non-overlapping node 231 are one non-through line DL' provided with a breakage opening V at the non-overlapping node 231 and the other continuously extending at the non-overlapping node 231 and passing through the breakage opening V.

[0146] The following will specifically describe how to reasonably arrange the positions of the breakage openings V on the two touch metal layers in different areas to achieve the specific way of differentiating the effective pattern densities in the first area AA1 and the second area AA2.

[0147] As an exemplary embodiment, as shown in FIG. 6 and FIG. 9, in one touch unit D, the effective touch pattern of the first touch metal layer TMA includes a plurality of first effective patterns 2100, and one first effective pattern 2100 corresponds to at least one first through line 210. For example, referring to FIG. 6, one first effective pattern 2100 corresponds to one first through line 210.

[0148] The first effective pattern 2100 includes a first trunk pattern 211 formed by the corresponding first through line 210 and a first branch pattern 212 connected to the first trunk pattern 211, and the first branch pattern 212 includes at least a first line segment 2121, which is formed by the non-through line DL' in the first touch metal layer TMA being broken, and the first line segment 2121 is a line segment intersecting with the first trunk pattern 211 to form the first grid node S1, that is, the first line segment 2121 is a line segment in the first touch metal layer TMA that has an intersection connection with the first trunk pattern 211.

[0149] As shown in FIG. 7 and FIG. 10, in one touch unit D, the effective touch pattern of the second touch metal layer TMB includes a plurality of second effective patterns 2200, and one second effective pattern 2200 corresponds to at least one second through line 220. For example, referring to FIG. 7, one second effective pattern 2200 corresponds to one second through line 220.

[0150] The second effective pattern 2200 includes a second stem pattern 221 formed by the corresponding second through-lines 220, and a second branch pattern 222 connected on the second stem pattern 221, the second branch pattern 222 at least includes a second line segment 2221 formed by the non-through-line DL' in the second touch metal layer TMB being disconnected by the disconnection opening V, and the second line segment 2221 is a line segment intersecting with the second stem pattern 221 to form the first grid node S1, that is, the second line segment 2221 is a line segment in the second touch metal layer TMB which has an intersection connection with the second stem pattern 221.

[0151] Specifically, in some embodiments, the first touch metal layer TMA is provided with n2 second non-through-lines DL2' extending along the second direction X, in the first region AA1, each of the first stem pattern 211 segments is intersected and connected with i1 first line segments 2121, and in the second region AA2, each of the first stem pattern 211 segments is intersected and connected with i2 first line segments 2121, where i1 can be greater than i2, so that the first effective pattern 2100 density in the first region AA1 is greater than the first effective pattern 2100 density in the second region AA2.

[0152] It can be understood that in other embodiments, i1 can also be less than or equal to i2, at this time, the effective pattern density in the first region AA1 and the second region AA2 can be realized to achieve the expected differential design based on the differential design of the effective pattern on the second touch metal layer TMB.

[0153] For example, as some exemplary embodiments, the second touch metal layer TMB is provided with n4 fourth non-through-lines DL4' extending along the second direction X, in the first region AA1, each of the second stem pattern 221 segments is intersected and connected with i3 second line segments 2221, and in the second region AA2, each of the second stem pattern 221 segments is intersected and connected with i4 second line segments 2221, where i3 can be greater than i4, so that the first effective pattern density P1 in the first region AA1 is greater than the second effective pattern density P2 in the second region AA2.

[0154] It can be understood that in other embodiments, i3 can also be less than or equal to i4, at this time, the effective pattern density in the first region AA1 and the second region AA2 can be realized to achieve the expected differential design based on the differential design of the effective pattern on the first touch metal layer TMA.

[0155] As an exemplary embodiment, as shown in FIG. 6 and FIG. 9, in one of the touch control units D, in the first touch metal layer TMA, at least part of the first effective pattern 2100 further comprises a plurality of first cross-line units 2122 formed by being disconnected by the non-through line DL' in the first touch metal layer TMA, the first cross-line unit 2122 comprises a third line segment 21221 and a fourth line segment 21222, the third line segment 21221 and the fourth line segment 21222 cross to form at least one first grid node S1. The third line segment 21221 is on the same non-through line DL' as the first line segment 2121 or is arranged in parallel, and the fourth line segment 21222 crosses the third line segment 21221 to form at least one first grid node.

[0156] For example, as shown in the dashed box J in FIG. 6, one of the first cross-line units 2122 can be a "cross" line pattern formed by the third line segment 21221 and the fourth line segment 21222 crossing.

[0157] It should be understood that the above is only an example, and the pattern of the first cross-line unit 2122 is not limited thereto.

[0158] As shown in FIG. 7 and FIG. 10, in the second touch metal layer TMB, at least part of the second effective pattern 2200 further comprises a plurality of second cross-line units 2222 formed by being disconnected by the non-through line DL' in the second touch metal layer TMB, the second cross-line unit 2222 comprises a fifth line segment 22221 and a sixth line segment 22222 crossing to form at least one first grid node S1

[0159] The fifth line segment 22221 and the sixth line segment 22222 cross to form at least one first grid node S1. The fifth line segment 22221 is on the same non-through line DL' as the second line segment 2221 or is arranged in parallel, and the fifth line segment 22221 crosses the second line segment 2221 to form at least one first grid node.

[0160] For example, as shown in the dashed box K in FIG. 7, one of the second cross-line units 2222 can be a "cross" line pattern formed by the fifth line segment 22221 and the second line segment 2221 crossing.

[0161] It should be understood that the above is only an example, and the pattern of the second cross-line unit 2222 is not limited thereto.

[0162] As an exemplary embodiment, the number of the first cross-line units 2122 in the touch unit D of the first area AA1 is greater than the number of the first cross-line units 2122 in the touch unit D of the second area AA2, so that the first effective pattern density P1 of the touch unit D in the first area AA1 is greater than the second effective pattern density P2 of the touch unit D in the second area AA2.

[0163] Specifically, as shown in FIG. 6, the number of the first through-lines 210 is m1 (for example, m1 = 7), the number of the first effective patterns 2100 in the first area AA1 and the second area AA2 is m1 respectively, the number of the first cross-line units 2122 in the first effective pattern 2100 in the first area AA1 is i5, the number of the first cross-line units 2122 in the first effective pattern 2100 in the second area AA2 is i6, i5 < i6.

[0164] As another exemplary embodiment, the number of the second cross-line units 2222 in the touch unit D of the first area AA1 is greater than the number of the second cross-line units 2222 in the touch unit D of the second area AA2, so that the effective pattern density of the touch unit D in the first area AA1 is greater than the effective pattern density of the touch unit D in the second area AA2.

[0165] Specifically, as shown in FIG. 7 and FIG. 10, taking the number of the second through-lines 220 as n1 (for example, n1 = 6), the number of the second effective patterns 2200 in the first area AA1 and the second area AA2 is i7 respectively, as shown in FIG. 7, the number of the second cross-line units 2222 in the second effective pattern 2200 in the first area AA1 is i8, the number of the second cross-line units 2222 in the second effective pattern 2200 in the second area AA2 is i9, i9 < i8.

[0166] As another exemplary embodiment, the number of the first cross-line units 2122 in the touch unit D of the first area AA1 is greater than the number of the first cross-line units 2122 in the touch unit D of the second area AA2, so that the effective pattern density of the touch unit D in the first area AA1 is greater than the effective pattern density of the touch unit D in the second area AA2; and the number of the second cross-line units 2222 in the touch unit D of the first area AA1 is greater than the number of the second cross-line units 2222 in the touch unit D of the second area AA2, so that the effective pattern density of the touch unit D in the first area AA1 is greater than the effective pattern density of the touch unit D in the second area AA2.

[0167] Specifically, the number of the first penetrating lines 210 is m1 (for example, m1 = 7), the number of the first effective patterns 2100 in the first region AA1 and the second region AA2 is m1 respectively, as shown in the figure, the number of the first cross-line units 2122 in the first effective pattern 2100 in the first region AA1 is i5, the number of the first cross-line units 2122 in the first effective pattern 2100 in the second region AA2 is i6, i5 < i6; and taking the number of the second penetrating lines 220 as n1 (for example, n1 = 6) for example, the number of the second effective patterns 2200 in the first region AA1 and the second region AA2 is i7 respectively, the number of the second cross-line units 2222 in the second effective pattern 2200 in the first region AA1 is i8, the number of the second cross-line units 2222 in the second effective pattern 2200 in the second region AA2 is i9, i9 < i8.

[0168] It should be understood that the above only illustrates the implementation mode of differentiating the touch control patterns in the first region AA1 and the second region AA2 based on the position of the broken opening V in the two-layer touch control metal layer, and the implementation mode of differentiating the touch control patterns in the first region AA1 and the second region AA2 is not limited to this in actual application.

[0169] In addition, as an exemplary embodiment, as shown in FIG. 6, when the number of the first effective patterns 2100 in the first touch control metal layer TMA is odd, the touch control unit D has a first virtual center line O1 extending along the first direction Y, one of the first effective patterns 2100 is a first center effective pattern 2100A, and the rest of the first effective patterns 2100 are first side effective patterns 2100B, the first penetrating lines 210 in the first center effective pattern 2100A pass through the first virtual center line O1, the first penetrating lines 210 in the first side effective patterns 2100B are mirror symmetric about the first virtual center line O1, and the patterns of the first side effective patterns 2100B located on the same side of the first virtual center line O1 are the same. In the above scheme, the first effective patterns 2100 with relatively uniform patterns can be obtained through the setting of the broken opening V.

[0170] In addition, as an exemplary embodiment, taking the first touch metal layer TMA shown in FIG. 11 as an example, in any one of the first region AA1 and the second region AA2, when the number of the first effective patterns 2100 in the first touch metal layer TMA is even, the touch unit D has a first virtual center line O1 extending along the first direction Y, a plurality of the first effective patterns 2100 are distributed on opposite sides of the first virtual center line O1 along the second direction X, and two first effective patterns 2100 closest to the first virtual center line O1 are respectively a second center effective pattern 2100C and a third center effective pattern 2100D, and the rest of the first effective patterns 2100 are second side effective patterns 2100F, wherein the second center effective pattern 2100C and the third center effective pattern 2100D have the same pattern, and a first through line 210 in a plurality of the second side effective patterns 2100F is mirror symmetric about the first virtual center line O1. Exemplarily, the patterns of the second side effective patterns 2100F on the same side of the first virtual center line O1 are the same; and one first through line 210 is arranged every A first non-through lines DL1'. In other words, a plurality of the first through lines 210 are arranged uniformly at a certain period. In the above scheme, by arranging the disconnection openings V, the first effective patterns 2100 with relatively uniform patterns can be obtained.

[0171] However, it should be understood that the above is only an exemplary description of the pattern of the first effective pattern 2100, and the specific pattern of the first effective pattern 2100 can be adjusted by arranging the disconnection openings V to obtain the expected target effective pattern.

[0172] In addition, as an exemplary embodiment, taking the second touch metal layer TMB shown in FIG. 12 as an example, in any one of the first region AA1 and the second region AA2, in the second touch metal layer TMB, when the number of the second effective patterns 2200 in the second touch metal layer TMB is odd, the touch unit D has a second virtual center line O2 extending along the second direction X, one second effective pattern 2200 in a plurality of the second effective patterns 2200 is a fourth center effective pattern 2200A, and the rest of the second effective patterns 2200 are fourth side effective patterns 2200B, a second through line 220 in the fourth center effective pattern 2200A passes through the second virtual center line O2, and the second through line 220 in the fourth side effective pattern 2200B is mirror symmetric about the second virtual center line O2. In the above scheme, by arranging the disconnection openings V, the second effective patterns 2200 with relatively uniform patterns can be obtained.

[0173] In addition, as an exemplary embodiment, taking the second touch metal layer TMB shown in FIG. 7 as an example, in any one of the first area AA1 and the second area AA2, when the number of the second effective patterns 2200 in the second touch metal layer TMB is even, the touch unit D has a second virtual center line O2 extending along the second direction X, a plurality of the second effective patterns 2200 are distributed on opposite sides of the second virtual center line O2 along the first direction Y, and the two second effective patterns 2200 closest to the second virtual center line O2 are respectively a fifth central effective pattern 2200C and a sixth central effective pattern 2200D, and the rest of the second effective patterns 2200 are fifth side effective patterns 2200E, wherein the fifth central effective pattern 2200C and the sixth central effective pattern 2200D have the same pattern, and the second through lines 220 in a plurality of the fifth side effective patterns 2200E are mirror symmetric about the second virtual center line O2. In the above scheme, by providing the disconnection opening V, the second effective pattern 2200 with a more uniform pattern can be obtained.

[0174] However, it should be understood that the above is only an exemplary description of the pattern of the second effective pattern 2200, and the specific pattern of the second effective pattern 2200 can be adjusted by the setting of the disconnection opening V to obtain the expected target effective pattern.

[0175] It should also be noted that in the above scheme, while meeting the design of different effective pattern densities in the first area AA1 and the second area AA2, the effective patterns in each touch metal layer can be designed based on the principle of uniform distribution to improve touch uniformity.

[0176] For example, based on the visual performance consideration, in the first area AA1, each first effective pattern 2100 in the touch metal layer can have the same pattern; similarly, in the first area AA1, each second effective pattern 2200 in the touch metal layer can have the same pattern; in the second area AA2, each first effective pattern 2100 in the touch metal layer can have the same pattern; and in the second area AA2, each second effective pattern 2200 in the touch metal layer can have the same pattern.

[0177] As described above, by designing the position of the disconnection opening V on each layer of the touch metal layer, the effective pattern densities P1 of the first area AA1 and the second area AA2 are different, and the purpose of the effective pattern density P1 of the first area AA1 being greater than the effective pattern density P2 of the second area AA2 is achieved.

[0178] However, the way to realize the effective pattern density P1 of the first area AA1 being greater than the effective pattern density P2 of the second area AA2 is not limited to this. For example, the effective pattern density P1 of the first area AA1 being greater than the effective pattern density P2 of the second area AA2 can also be realized by differentiating the line width of the grid lines DL on the effective patterns in the first area AA1 and the second area AA2.

[0179] As an exemplary embodiment, as shown in FIG. 13 and FIG. 14, the line width of the grid lines DL on the first touch metal layer TMA in the first area AA1 is a, the line width of the grid lines DL on the first touch metal layer TMA in the second area AA2 is c, and a>c; and / or, the line width of the grid lines DL on the second touch metal layer TMB in the first area AA1 is b, the line width of the grid lines DL on the second touch metal layer TMB in the second area AA2 is d, and b>d. Similarly, as shown in FIG. 15 and FIG. 16, e>g, and f>h. That is, the line width of the grid lines DL of at least one of the first touch metal layer TMA and the second touch metal layer TMB in the first area AA1 is greater than the line width of the grid lines DL of at least one of the first touch metal layer TMA and the second touch metal layer TMB in the second area AA2.

[0180] Here, the effective touch patterns in the first area AA1 and the second area AA2 in FIG. 13 and FIG. 14 can be the same, and the effective touch patterns in the first area AA1 and the second area AA2 in FIG. 15 and FIG. 16 can be different.

[0181] With the above scheme, the effective pattern density P1 of the first area AA1 being greater than the effective pattern density P2 of the second area AA2 is realized by designing the line width of the grid lines DL in the first area AA1 to be greater than the line width of the grid lines DL in the second area AA2.

[0182] As an exemplary embodiment, 2 μm≤a≤10 μm, 2 μm≤b≤10 μm, 2 μm≤c≤6 μm, and 2 μm≤d≤6 μm. Similarly, 2 μm≤e≤10 μm, 2 μm≤f≤10 μm, 2 μm≤g≤6 μm, and 2 μm≤h≤6 μm. It should be understood that the specific values of a, b, c, d, e, f, g, and h are not limited herein.

[0183] It also needs to be explained that, as described above, the effective pattern density P1 of the first region AA1 can be greater than the effective pattern density P2 of the second region AA2 by differentiating the effective pattern in the first region AA1 and the second region AA2; or the effective pattern density P1 of the first region AA1 can be greater than the effective pattern density P2 of the second region AA2 by differentiating the line width in the first region AA1 and the second region AA2; or the effective pattern density P1 of the first region AA1 can be greater than the effective pattern density P2 of the second region AA2 by differentiating the effective pattern in the first region AA1 and the second region AA2 in combination with differentiating the line width.

[0184] In addition, the applicant of the present disclosure finds that in the related art, the grid pattern in the touch display substrate 10 generally has a minimum grid unit surrounded by the periphery of a pixel opening, and the metal density is too large, which can cause the touch pattern load capacitance C to be large.

[0185] In order to improve the above problems, as an exemplary embodiment of the present disclosure, as shown in FIG. 17 and FIG. 18, the display substrate 100 includes a plurality of pixel units 400 arranged in an array, each pixel unit 400 can include at least two sub-pixels Pexl. The minimum grid unit T in the grid pattern formed by the first touch metal layer TMA and the second touch metal layer TMB has a normal projection on the display substrate 100 which surrounds the periphery of J1×J2 pixel units 400, J1 and J2 are both positive integers greater than or equal to 1.

[0186] By using the above scheme, by surrounding the periphery of at least two pixel units 400 with a minimum grid unit T, the metal density in the touch unit D can be reduced, and the load capacitance C of the touch unit D can be reduced.

[0187] For example, the value of J1 can be 1-100, and the value of J2 can be 1-100, that is, a minimum grid unit T corresponds to the periphery of 1×1-100×100 pixel units 400.

[0188] In actual application, the specific values of J1 and J2 can be determined according to the screen size of the touch display substrate 10, the size of the touch unit D, the load capacitance C of the RX channel or the TX channel, etc.

[0189] Please refer to the embodiment shown in FIG. 18, which shows that a minimum grid unit T corresponds to the periphery of 2×2 pixel units 400.

[0190] In addition, as an exemplary embodiment, 200≥m1≥1, 200≥n1≥1. That is, in one touch unit D, the number of the first through lines 210 is 1-200, and the number of the second through lines 220 is 1-200.

[0191] According to the physical law of parallel metal resistance, the more the number of the first through lines 210 or the second through lines 220, the lower the resistance of the RX channel or the TX channel in the touch unit D. When the number of the first through lines 210 or the second through lines 220 in the touch unit D is small, if a through line is broken due to process reasons, the signal connected to the broken position is floating, which will cause the capacitance of the RX channel or the TX channel corresponding to the broken position to be abnormal.

[0192] Therefore, in order to solve the above problems, as some exemplary embodiments, m1≥3, n1≥3. That is, the number of the first through lines 210 is at least 3, and the number of the second through lines 220 is at least 3, which can effectively reduce the load capacitance C of the touch unit D.

[0193] In addition, more through lines can greatly reduce the problem of abnormal capacitance of the RX channel or the TX channel caused by the broken line, that is, even if there is a broken line, the influence on the capacitance of the RX channel or the TX channel is small, thereby improving the yield and reliability of the product.

[0194] Further, for example, m1≥6, n1≥6. It should be understood that the number of the first through lines 210 or the second through lines 220 is not limited to this.

[0195] In addition, in order to reduce the load capacitance C of the touch unit D, the line width of the grid line DL can also be widened, and as some exemplary embodiments of the present disclosure, the line width of at least part of the grid line DL can be 2-8 μm.

[0196] In the touch display substrate 10 provided by the embodiments of the present disclosure, the touch unit D has m1×n1 bridge points 230, and the more the number of the bridge points 230, the larger the capacitance Δcm between the RX channel and the TX channel. However, if the capacitance Δcm is too large, the load capacitance C will also be too large.

[0197] To improve the above problems, as an exemplary embodiment, as shown in FIG. 19, at least one of the first through line 210 and the second through line 220 is configured to include a wide line segment area 200a and a narrow line segment area 200b, the line width of the narrow line segment area 200b is smaller than the line width of the wide line segment area 200a, the narrow line segment area 200b of one of the first through line 210 and the second through line 220 overlaps the orthographic projection of the other on the display substrate 100 to form the bridge point 230.

[0198] In other words, the line width of at least one of the first through line 210 and the second through line 220 at the overlapping area position is smaller than the line width at the remaining area. With the above scheme, the overlapping area of the first through line 210 and the second through line 220 at each bridge point 230 can be reduced while ensuring a larger number of bridge points 230, so as to properly increase the capacitance Δcm to improve the touch performance.

[0199] For example, the line width of the wide line segment area 200a ranges from 2 to 8 μm, and the line width of the narrow line segment area 200b ranges from 2 to 6 μm.

[0200] FIG. 20 shows the stacked graphic diagram of the first through line 210 and the second through line 220 at the bridge point 230 position in some embodiments of the present disclosure.

[0201] As an exemplary embodiment, as shown in FIG. 19, the line width c of the wide line segment area 200a of the first through line 210 ranges from 2 μm to 8 μm, the line width d of the wide line segment area 200a of the second through line 220 ranges from 2 μm to 8 μm, at the bridge point 230 position, the line width a of the narrow line segment area 200b of the first through line 210 ranges from 2 μm to 6 μm, and the line width b of the narrow line segment area 200b of the first through line 210 ranges from 2 μm to 6 μm.

[0202] As an exemplary embodiment, the difference between the line width of the narrow line segment area 200b and the line width of the wide line segment area 200a ranges from 0.5 to 4 μm.

[0203] It should be noted that different line widths have different effects on the load capacitance C of the touch unit D, and in actual applications, the line width of the grid line DL can be reasonably selected according to the capacitance extraction result (RCE) and the position of the bridge point 230.

[0204] FIG. 20 shows the partial pattern diagram of the touch layer 200 at the bridge point 230 position in an embodiment, FIG. 21 shows the cross-sectional structure diagram of A-A' direction in the figure, and FIG. 22 shows the cross-sectional structure diagram of B-B' direction in the figure.

[0205] As shown in FIGS. 20-22, the display substrate 100 can be provided with a thin film encapsulation layer 500, and the touch layer 200 can be disposed on a side of the thin film encapsulation layer 500 that faces away from the display substrate 100, and the touch layer 200 includes, in order from a side that faces away from the display substrate 100, a first touch metal layer TMA, an insulating layer 700, a second touch metal layer TMB, and the like. It should be noted that FIG. 20 only shows a schematic view of the first through-hole line 210 and the second through-hole line 220 each being provided with a narrow line segment region 200b at the position of the bridge point 230, but in other embodiments not shown, only one of the first through-hole line 210 and the second through-hole line 220 can be provided with the narrow line segment region 200b.

[0206] It should also be noted that, as shown in FIG. 21, the first touch metal layer TMA is located on a side of the second touch metal layer TMB that is close to the display substrate 100, but in other embodiments, the positions of the first touch metal layer TMA and the second touch metal layer TMB can be interchanged, i.e., the first touch metal layer TMA is located on a side of the second touch metal layer TMB that is away from the display substrate 100.

[0207] In addition, as an exemplary embodiment, as shown in FIG. 24, at the non-overlapping node 231, at least one non-through line DL' that forms the non-overlapping node 231 is broken by the break opening V, and two free ends 231a are formed. At the position of the break opening V, there is a risk of static electricity.

[0208] In order to reduce the risk of static electricity, as some exemplary embodiments of the present disclosure, the size d1 of the break opening V in the extension direction of the non-through line DL' is 3 μm≤d1≤80 μm. In this way, the size of the break opening V is larger, and the risk of static electricity between the two free ends 231a can be reduced.

[0209] However, although the size of the break opening V is enlarged to improve the static electricity phenomenon, if the size of the break opening V is too large, it will be unfavorable for the improvement of the shadow phenomenon. This is because, in the touch display substrate 10, the grid lines DL in the touch unit D are surrounded by the periphery of the pixel unit 400 of the display substrate 100, and the grid lines have certain interference, diffraction, and the like on light rays. If the size of the break opening V is large, the area of the four sides of the pixel unit 400 that is provided with the break opening V will have a difference in optical effect compared to other areas, and in some viewing angles or perspectives, these optical differences can be easily observed, i.e., there is a shadow phenomenon.

[0210] Therefore, in order to improve the phenomenon of shadow elimination, as an exemplary embodiment, as shown in FIG. 23, one of the two grid lines DL forming the non-overlapping node 231 is continuously and uninterruptedly extended at the disconnection opening V, the other grid line is a non-through line, and the non-through line DL' is disconnected by the disconnection opening V, thereby forming two free ends 231a; wherein, a virtual optical compensation line 600 is further arranged at the disconnection opening V, the orthographic projection of the virtual optical compensation line 600 on the display substrate 100 is located between the two free ends 231a, and the virtual optical compensation line 600 maintains a separation distance d2 from the two free ends 231a respectively, and the virtual optical compensation line 600 is arranged to overlap with the grid line DL which is continuously and uninterruptedly extended at the non-overlapping node.

[0211] By arranging the virtual optical compensation line 600 at the disconnection opening V, the vacancy area at the disconnection opening V can be optically compensated, so as to minimize the optical difference between the disconnection opening V and the positions of the other grid lines DL, thereby improving the phenomenon of shadow elimination.

[0212] It should be noted that the virtual optical compensation line 600 is in a floating state, that is, not electrically connected to other structures or not receiving any electrical signals.

[0213] As an exemplary embodiment, the virtual optical compensation line 600 and the non-through line DL' forming the disconnection opening V at the non-overlapping node 231 are arranged in the same layer and the same material, and the difference between the width of the virtual optical compensation line 600 along the width direction of the non-through line DL' and the line width of the non-through line DL' is within a threshold value.

[0214] By the above scheme, the virtual optical compensation line 600 arranged at the disconnection opening V can be arranged in the same layer and the same material as the non-through line DL' forming the disconnection opening V, and only a separation distance between the virtual optical compensation line 600 and the non-through line DL' is maintained, so that the process steps can not be increased.

[0215] As an exemplary embodiment, the separation distance d2 along the extension direction of the corresponding non-through line DL' is: 2 μm≤d2≤50 μm. Of course, it can be understood that the specific value of the separation distance can be selected in combination with the actual product structure, and is not limited thereto.

[0216] In some embodiments, at at least some of the non-overlapping nodes 231, the non-through line DL' forming the breakage V is located on the first touch metal layer TMA, the grid line DL continuously and uninterruptedly extending at the non-overlapping node 231 is located on the second touch metal layer TMB, the virtual optical compensation line 600 is located on the first touch metal layer TMA, and is interrupted from the free end 231a of the non-through line DL' located on the first touch metal layer TMA, and is arranged to overlap the grid line DL forming the non-overlapping node 231 on the second touch metal layer TMB.

[0217] At at least some of the non-overlapping nodes 231, the non-through line DL' forming the breakage V is located on the second touch metal layer TMB, the grid line DL continuously and uninterruptedly extending at the non-overlapping node 231 is located on the first touch metal layer TMA, the virtual optical compensation line 600 is located on the second touch metal layer TMB, and is interrupted from the free end 231a of the non-through line DL' located on the second touch metal layer TMB, and is arranged to overlap the grid line DL forming the non-overlapping node 231 on the first touch metal layer TMA.

[0218] In addition, as an exemplary embodiment, as shown in FIGS. 25-27, the M1 first grid lines in the first touch metal layer are arranged in the second direction X in sequence, and the two first grid lines located at the outermost periphery are respectively a first peripheral grid line DLA and a second peripheral grid line DLB, wherein the first peripheral grid line DLA and the second peripheral grid line DLB are both floating virtual grid lines, i.e., not electrically connected with other structures or not receiving any electrical signals. At least one of the first peripheral grid line DLA and the second peripheral grid line DLB is configured to have at least one breakage V in the first direction Y.

[0219] With the above scheme, the first grid lines arranged on the opposite sides of the touch unit D in the second direction X can be respectively the first peripheral grid line DLA and the second peripheral grid line DLB, and the first peripheral grid line DLA and the second peripheral grid line DLB have a higher risk of static electricity, because the first peripheral grid line DLA and the second peripheral grid line DLB are in a floating state and have no connection with the surrounding metal patterns. If the first peripheral grid line DLA and the second peripheral grid line DLB are not designed to be broken in the first direction Y, there will be a whole column of metal patterns corresponding to the first peripheral grid line DLA and the second peripheral grid line DLB respectively, which is easy to accumulate electric charge, form a potential difference with the surrounding metal patterns, and discharge to the surrounding metal patterns at some moments, causing static electricity and other adverse effects.

[0220] Therefore, by providing at least one disconnection opening V on the first and second peripheral grid lines DLA and DLB respectively along the self-extending direction, the electrostatic malfunctions can be further avoided. In other words, the first and second peripheral grid lines DLA and DLB are divided into a plurality of peripheral grid units DLA1 by the disconnection openings V.

[0221] The size d1 of the disconnection opening V provided on any one of the first and second peripheral grid lines DLA and DLB along the first direction Y is 3 μm≤d1≤80 μm. In this way, the size of the disconnection opening V is large, and the risk of electrostatic penetration between adjacent peripheral grid units DLA1 can be reduced.

[0222] It should be noted that any one of the first and second peripheral grid lines DLA and DLB can be divided into two or more peripheral grid units DLA1 by the disconnection opening V.

[0223] As an exemplary embodiment, as shown in FIG. 28, in a touch area including 3×3 touch units D, the first or second peripheral grid line DLA of at least one of the touch units D is disconnected into two peripheral grid units DLA1, so that the electrostatic phenomenon can be effectively avoided. It should be understood that the above is only an example, and in other embodiments, the number and position of the disconnection openings V of the peripheral grid lines DLA are not limited thereto.

[0224] In addition, as an exemplary embodiment, as shown in FIG. 5, the size of the orthographic projection of the touch unit D on the display substrate 100 is 6 mm≥x0≥3 mm and 6 mm≥y0≥3 mm, y0 is the size of the orthographic projection of the touch unit D on the display substrate 100 along the first direction Y, and x0 is the size of the orthographic projection of the touch unit D on the display substrate 100 along the second direction X. With the above scheme, the touch display substrate 10 can have better touch accuracy. However, the specific size of the touch unit D is not limited thereto.

[0225] In the touch display substrate 10 provided by the embodiments of the present disclosure, the more uniform the positions of the first and second through lines 210 and 220 arranged in the touch layer 200, the more conducive to shadow elimination and improvement, and the more uniform the touch patterns corresponding to the RX and TX channels.

[0226] In some example embodiments of the present disclosure, as shown in FIG. 6, in the first touch metal layer TMA, when m1 is even, m1 first through lines 210 are arranged in the second direction X every A first grid lines DL1, where A is an integer greater than or equal to 0. That is, at least part of the first through lines 210 are evenly distributed in the touch unit D. In this way, it is beneficial to the uniformity of the touch signal in the first touch metal layer TMA.

[0227] In some example embodiments of the present disclosure, in the first touch metal layer TMA, when m1 is odd, the touch unit D has a first virtual center line O1 extending in the first direction Y, at least one first through line 210 passes through the first virtual center line O1, and the remaining first through lines 210 are symmetrically distributed about the first virtual center line O1, and every A first grid line DL1 is provided with one first through line 210 among the remaining first through lines 210, where A is an integer greater than or equal to 0. That is, at least one first through line 210 is located at the center of the touch unit D, and the remaining first through lines 210 are evenly and symmetrically distributed in the touch unit D. In this way, it is beneficial to the uniformity of the touch signal in the first touch metal layer TMA.

[0228] As an example embodiment, please refer to FIG. 5 and FIG. 6, the number of first through lines 210 is 7, for example, and the 7 first through lines 210 are sequentially arranged in the first direction Y, which are the 1st first through line 210, the 2nd first through line 210, the 3rd first through line 210, the 4th first through line 210, the 5th first through line 210, the 6th first through line 210, and the 7th first through line 210.

[0229] The 1st first through line 210 and the 2nd first through line 210 are separated by one non-through line DL' arranged in the same layer as the first through line 210, the 2nd first through line 210 and the 3rd first through line 210 are separated by one non-through line DL' arranged in the same layer as the first through line 210, the 5th first through line 210 and the 6th first through line 210 are separated by one non-through line DL' arranged in the same layer as the first through line 210, the 6th first through line 210 and the 7th first through line 210 are separated by one non-through line DL' arranged in the same layer as the first through line 210, the 4th first through line 210 passes through the first virtual center line O1, and the 1st first through line 210, the 2nd first through line 210, and the 3rd first through line 210 are symmetrically distributed about the first virtual center line O1 with the 5th first through line 210, the 6th first through line 210, and the 7th first through line 210, respectively.

[0230] Similarly, as shown in FIG. 5 and FIG. 7, in some example embodiments of the present disclosure, in the second touch metal layer TMB, when n1 is even, one second through line 220 is arranged in the second direction X every B second grid lines DL2, where B is an integer greater than or equal to 0. That is, at least part of the second through lines 220 are uniformly distributed in the touch unit D. In this way, it is beneficial to the uniformity of the touch signal in the second touch metal layer TMB.

[0231] In some example embodiments of the present disclosure, in the second touch metal layer TMB, when n1 is odd, the touch unit D has a second virtual center line O2 extending in the second direction X, one second through line 220 passes through the second virtual center line O2, and the remaining second through lines 220 are symmetrically distributed about the second virtual center line O2, and among the remaining first through lines 210, one second through line 220 is arranged in the second direction X every B second grid lines DL2, where B is an integer greater than or equal to 0. That is, at least one second through line 220 is located at the center of the touch unit D, and the remaining second through lines 220 are uniformly and symmetrically distributed in the touch unit D. In this way, it is beneficial to the uniformity of the touch signal in the second touch metal layer TMB.

[0232] As shown in FIG. 5 and FIG. 7, when the number of second through lines 220 is even, for example, 6, in the first direction Y, the 6 second through lines 220 are sequentially arranged as the 1st second through line 220, the 2nd second through line 220, the 3rd second through line 220, the 4th second through line 220, the 5th second through line 220, and the 6th second through line 220. Among them, the 1st second through line 220 and the 2nd second through line 220 are separated by one non-through line DL' arranged in the same layer as the second through line 220, the 2nd second through line 220 and the 3rd second through line 220 are separated by one non-through line DL' arranged in the same layer as the second through line 220, the 4th second through line 220 and the 5th second through line 220 are separated by one non-through line DL' arranged in the same layer as the second through line 220, and the 5th second through line 220 and the 6th second through line 220 are separated by one non-through line DL' arranged in the same layer as the second through line 220.

[0233] In other embodiments of the present disclosure, other ways can also be used to symmetrically distribute at least part of the second through lines 220 in the touch unit D, and uniformly distribute at least part of the second through lines 220 in the touch unit D. In this way, it is beneficial to the uniformity of the touch signal in the second touch metal layer TMB.

[0234] Furthermore, this disclosure also provides a display device, which includes the touch display substrate 10 provided in this disclosure. The display device includes, but is not limited to, smartphones, monitors, laptops, tablets, electronic photo frames, dashcams, smart wearable devices, and other devices with display functions. Other essential components of the display device (such as driver chips) are readily understood by those skilled in the art and will not be described in detail here, nor should they be construed as limiting this disclosure. Since the principle by which this display device solves the problem is similar to that of the touch display substrate 10 described above, the embodiments of the display device provided in this disclosure can be referenced to the embodiments of the touch display substrate 10 provided in this disclosure, and will not be described again here.

[0235] The following points need to be explained:

[0236] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0237] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the present disclosure, i.e., these drawings are not drawn to actual scale. It will be understood that when an element such as a layer, film, region or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element or there may be intermediate elements.

[0238] (3) Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0239] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. The scope of protection of this disclosure shall be determined by the scope of the claims.

Claims

1. A touch display substrate, characterized in that, The display area of the touch display substrate includes a first region and a second region, the second region includes a middle region of the touch display substrate, and the first region includes an edge region located at the periphery of the middle region. The display substrate; and A touch layer is located on the display side of the display substrate, and the orthographic projection of the touch layer on the display substrate includes a plurality of touch units arranged in an array, each of the touch units having a touch pattern. In the first region, the proportion of the effective touch pattern area capable of being touch-recognized in the total area of a touch region of a touch unit is a first effective pattern density P1. In the second region, the proportion of the effective touch pattern area capable of being touch-recognized in the total area of a touch region of a touch unit is a second effective pattern density P2; P1 is greater than P2. 2.The touch display substrate of claim 1, wherein, The first region includes at least two edge sub-regions arranged in sequence along a direction from the edge region to the middle region, and the first effective pattern density of the touch units gradually decreases along the direction from the edge region to the middle region. 3.The touch display substrate of claim 1, wherein, The first region includes a first edge sub-region and a second edge sub-region arranged in sequence along a direction from the edge region to the middle region, wherein The middle region has a first dimension x along a second direction and a second dimension y along a first direction, and the first direction intersects the second direction; Along the second direction, the first edge sub-region has a first width x1 and a second width x2 on opposite sides of the middle region; along the first direction, the second edge sub-region has a third width y1 and a fourth width y2 on opposite sides of the middle region; Along the second direction, the second edge sub-region has a fifth width x3 and a sixth width x4 on opposite sides of the middle region; along the first direction, the first edge sub-region has a seventh width y3 and an eighth width y4 on opposite sides of the middle region; 0.01≤x1 / x≤5, 0.01≤x2 / x≤5, 0.01≤x3 / x≤5, 0.01≤x4 / x≤5, 0.01≤y1 / y≤5, 0.01≤y2 / y≤5, 0.01≤y3 / y≤5, 0.01≤y4 / y≤5. 4.The touch display substrate of claim 1, wherein, The ratio of P2 to P1 is 0.2-0.

8. 5.The touch display substrate of claim 1, wherein, The touch unit includes a first touch metal layer and a second touch metal layer, each of the first touch metal layer and the second touch metal layer includes a plurality of grid lines arranged in a mesh shape along a first direction and along a second direction intersecting the first direction; The plurality of grid lines of the first touch metal layer includes a plurality of first through lines, the first through lines penetrating the corresponding touch unit along the first direction; the plurality of grid lines of the second touch metal layer includes a plurality of second through lines, the second through lines penetrating the corresponding touch unit along the second direction; One of the first through lines and the second through lines is used for transmitting a touch transmission signal, and the other is used for transmitting a touch reception signal; the orthographic projections of the first through lines and the second through lines on the display substrate overlap with each other to form a plurality of bridge points. 6.The touch display substrate of claim 5, wherein, The number of bridge points of the touch unit in the first region is the same as the number of bridge points of the touch unit in the second region. 7.The touch display substrate of claim 5, wherein, The plurality of grid lines of the first touch metal layer includes M1 first grid lines extending along the first direction and N1 second grid lines extending along the second direction; The plurality of grid lines of the second touch metal layer includes M2 third grid lines extending along the first direction and N2 fourth grid lines extending along the second direction; The M1 first grid lines and the M2 third grid lines are arranged alternately along the second direction, The N1 second grid lines and the N2 fourth grid lines are arranged alternately along the first direction, so that the orthographic projection of the touch unit on the display substrate has (M1+M2)×(N1+N2) grid nodes; M1 first grid lines include m1 first through lines, N2 fourth grid lines include n1 second through lines, m1≤M1, n1≤N2, and M1, M2, N1, N2 are positive integers greater than or equal to 1. 8.The touch display substrate of claim 7, wherein, At least one of the first touch metal layer and the second touch metal layer further includes a plurality of non-through lines having a broken opening; The (M1+M2)×(N1+N2) grid nodes include: a plurality of first grid nodes formed by the intersection of grid lines in the same layer of metal grid layer; and a plurality of second grid nodes formed by the intersection of grid lines in different layers of metal grid layer; Wherein, a plurality of the second grid nodes include m1×n1 bridge points and non-overlapping nodes other than the bridge points; for any non-overlapping node, at least one of the two grid lines intersecting to form the non-overlapping node is a non-through line, and the at least one non-through line has a broken opening at least at the non-overlapping node.

9. The touch display substrate of claim 8, wherein The effective touch pattern of the first touch metal layer includes a plurality of first effective patterns, one of the first effective patterns corresponds to at least one of the first through lines, the first effective pattern includes a first trunk pattern formed by the corresponding first through line and a first branch pattern connected to the first trunk pattern, the first branch pattern at least includes a first line segment formed by the non-through line in the first touch metal layer being broken, the first line segment is a line segment intersecting with the first trunk pattern to form the first grid node; The effective touch pattern of the second touch metal layer includes a plurality of second effective patterns, one of the second effective patterns corresponding to at least one of the second through lines, the second effective pattern including a second stem pattern formed by the corresponding second through line and a second branch pattern connected to the second stem pattern, the second branch pattern including at least a second line segment formed by a non-through line in the second touch metal layer being disconnected, the second line segment being a line segment intersecting with the second stem pattern to form the first grid node. 10.The touch display substrate of claim 9, wherein, In the first touch metal layer, at least part of the first effective pattern further includes a plurality of first cross-line units formed by non-through lines in the first touch metal layer being disconnected, the first cross-line unit including a third line segment and a fourth line segment, the third line segment being arranged on the same non-through line as the first line segment or being parallel to the first line segment, the fourth line segment intersecting with the third line segment to form at least one of the first grid nodes; In the second touch metal layer, at least part of the second effective pattern further includes a plurality of second cross-line units formed by non-through lines in the second touch metal layer being disconnected, the second cross-line unit including a fifth line segment and a sixth line segment intersecting to form at least one of the first grid nodes, the fifth line segment being arranged on the same non-through line as the second line segment or being parallel to the second line segment, the fifth line segment intersecting with the sixth line segment to form at least one of the first grid nodes. 11.The touch display substrate of claim 10, wherein, The number of the first cross-line units in the touch unit of the first region is greater than the number of the first cross-line units in the touch unit of the second region, so that the first effective pattern density P1 of the touch unit in the first region is greater than the second effective pattern density P2 of the touch unit in the second region; and / or The number of the second cross-line units in the touch unit of the first region is greater than the number of the second cross-line units in the touch unit of the second region, so that the first effective pattern density P1 of the touch unit in the first region is greater than the second effective pattern density P2 of the touch unit in the second region. 12.The touch display substrate of claim 10, wherein, In the first touch metal layer, When the number of the first effective patterns is odd, the touch unit has a first virtual center line extending along the first direction, one of the first effective patterns being a first center effective pattern and the rest of the first effective patterns being first side effective patterns, the first through line in the first center effective pattern passing through the first virtual center line, the first through line in the first side effective pattern being mirror-symmetrical about the first virtual center line, and the first side effective patterns located on the same side of the first virtual center line having the same pattern. When the number of the first effective patterns is even, the touch unit has a first virtual center line extending along the first direction, a plurality of the first effective patterns are distributed on opposite sides of the first virtual center line along the second direction, and two first effective patterns closest to the first virtual center line are respectively a second center effective pattern and a third center effective pattern, and the rest of the first effective patterns are second side effective patterns, wherein the second center effective pattern and the third center effective pattern have the same pattern, the first through lines in a plurality of the second side effective patterns are mirror-symmetrical about the first virtual center line, and the patterns of the second side effective patterns on the same side of the first virtual center line are the same. 13.The touch display substrate of claim 10, wherein, In the second touch metal layer, When the number of the second effective patterns is odd, the touch unit has a second virtual center line extending along the second direction, one second effective pattern is a fourth center effective pattern, and the rest of the second effective patterns are fourth side effective patterns, the second through lines in the fourth center effective pattern pass through the second virtual center line, the second through lines in the fourth side effective patterns are mirror-symmetrical about the second virtual center line, and the patterns of the fourth side effective patterns on the same side of the second virtual center line are the same. When the number of the second effective patterns is even, the touch unit has a second virtual center line extending along the second direction, a plurality of the second effective patterns are distributed on opposite sides of the second virtual center line along the first direction, and two second effective patterns closest to the second virtual center line are respectively a fifth center effective pattern and a sixth center effective pattern, and the rest of the second effective patterns are fifth side effective patterns, wherein the fifth center effective pattern and the sixth center effective pattern have the same pattern, the second through lines in a plurality of the fifth side effective patterns are mirror-symmetrical about the second virtual center line, and the patterns of the fifth side effective patterns on the same side of the second virtual center line are the same. At the non-overlapping node, one of the two grid lines of the non-overlapping node continuously and uninterruptedly extends at the break opening, and the other grid line is a non-through line, and the non-through line is broken by the break opening to form two free ends; wherein a virtual optical compensation line is further arranged at the break opening, the orthographic projection of the virtual optical compensation line on the display substrate is located between the two free ends, and a separation distance is maintained between the two free ends respectively, and the virtual optical compensation line is arranged to overlap the grid line continuously and uninterruptedly extending at the non-overlapping node. 14.The touch display substrate of claim 9, wherein, The virtual optical compensation line and the non-through line forming the break opening at the non-overlapping node are arranged in the same layer and of the same material, and the difference between the width of the virtual optical compensation line along the line width direction of the non-through line and the line width of the non-through line is within a threshold value. 15.The touch display substrate of claim 14, wherein, The separation distance has a size d2 in the extension direction of the corresponding non-through line: 2μm≤d2≤50μm. 16.The touch display substrate of claim 14, wherein, ​ 17.The touch display substrate of claim 8, wherein, The size d1 of the breakage opening along the direction of the non-through line where the breakage opening is located is 3 μm ≤ d1 ≤ 80 μm. 18.The touch display substrate of claim 5, wherein, The M1 first grid lines in the first touch metal layer are arranged along the second direction in sequence, and the two outermost first grid lines are a first outermost grid line and a second outermost grid line, wherein the first outermost grid line and the second outermost grid line are both floating virtual grid lines, and at least one of the first outermost grid line and the second outermost grid line is configured to have at least one breakage opening in the first direction. 19.The touch display substrate of claim 5, wherein, The line width of at least part of the grid lines in the first region is greater than the line width of at least part of the grid lines in the second region. 20.The touch display substrate of claim 19, wherein, The line width of the grid lines on the first touch metal layer in the first region is a, the line width of the grid lines on the first touch metal layer in the second region is c, a > c; and / or, the line width of the grid lines on the second touch metal layer in the first region is b, the line width of the grid lines on the second touch metal layer in the second region is d, b > d. 21.The touch display substrate of claim 20, wherein, 2 μm ≤ a ≤ 10 μm, 2 μm ≤ b ≤ 10 μm, 2 μm ≤ c ≤ 6 μm, 2 μm ≤ d ≤ 6 μm.

22. A display device comprising: The touch display substrate as claimed in any one of claims 1 to 21. The touch display substrate as claimed in any one of claims 1 to 21.

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