Touch display substrate and display device

Abstract

The present disclosure provides a touch display substrate and a display device. The touch display substrate comprises: a display substrate; and a touch layer, the orthographic projection of which on the display substrate comprises a plurality of touch units distributed in an array, each touch unit comprising a first touch metal layer and a second touch metal layer. The first touch metal layer at least comprises m1 first through lines passing through the touch unit in a first direction; the second touch metal layer at least comprises n1 second through lines passing through the touch unit in a second direction; one of the first through lines and the second through lines is used for transmitting a touch sending signal, and the other is used for transmitting a touch receiving signal; the orthographic projections of the m1 first through lines and the n1 second through lines on the display substrate overlap with each other to form m1×n1 bridge points; and both m1 and n1 are positive integers greater than or equal to 1. The present disclosure provides a touch display substrate and a display device, thereby improving the touch performance of a touch display product.

Description

A touch display substrate and display device Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a touch display substrate and display device. Background Technology

[0002] With the development of touch technology, in addition to the common finger touch, capacitive touchscreens can also be controlled by styluses. Styluses are divided into passive pens and active pens. Active pens, due to their small pen tip, combine functions such as pen pressure, hover touch, and buttons, and have a wider range of applications and prospects than passive pens.

[0003] With the development of active pen technology, more and more touchscreens, such as mobile phones, laptops, and tablets, are equipped with active pens, placing higher demands on their performance. However, in related technologies, the accuracy and linearity of touch control using active pens on medium and large-sized touchscreens are relatively poor, affecting touch performance.

[0004] Summary of the Invention

[0005] This disclosure provides a touch display substrate and a display device that can improve the touch performance of touch display products.

[0006] The technical solutions provided in this disclosure are as follows:

[0007] In a first aspect, embodiments of this disclosure provide a touch display substrate, including:

[0008] Display substrate;

[0009] The touch layer is located on the display side of the display substrate. The orthographic projection of the touch layer on the display substrate includes a plurality of touch units arranged in an array. Each touch unit includes at least a first touch metal layer and a second touch metal layer that are insulated from each other. Either the first touch metal layer or the second touch metal layer includes a plurality of grid lines that intersect in a mesh pattern along a first direction and a second direction.

[0010] The first touch metal layer has at least m1 first through lines that penetrate the touch unit along the first direction; the second touch metal layer has at least n1 second through lines that penetrate the touch unit along the second direction; one of the first through lines and the second through lines is used to transmit touch sending signals, and the other is used to transmit touch receiving signals. The orthographic projections of the m1 first through lines and the n1 second through lines on the display substrate overlap each other to form m1×n1 bridge points, where m1 and n1 are both positive integers greater than or equal to 1.

[0011] 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;

[0012] 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;

[0013] The M1 first grid lines and the M2 third grid lines are alternately arranged along the second direction in sequence,

[0014] The N1 second grid lines and the N2 fourth grid lines are alternately arranged along the first direction in sequence, so that the orthographic projection of the touch unit on the display substrate has (M1+M2)×(N1+N2) grid nodes;

[0015] Among them, 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, N2 are all positive integers greater than or equal to 1.

[0016] Exemplarily, at least one of the first touch metal layer and the second touch metal layer further includes a plurality of non-through lines with broken openings;

[0017] The (M1+M2)×(N1+N2) grid nodes include:

[0018] A plurality of first grid nodes formed by the intersection of grid lines in the same layer of metal grid layer, and

[0019] A plurality of second grid nodes formed by the intersection of grid lines in different layers of metal grid layer;

[0020] Among them, 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 at least one of the non-through lines has a broken opening at least at the non-overlapping node.

[0021] Exemplarily, the effective 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 main pattern formed by the corresponding first through line and a first branch pattern connected on the first main 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 main pattern to form the first grid node;

[0022] The effective 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.

[0023] For example, 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 the third line segment to form at least one of the first grid nodes.

[0024] 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 the sixth line segment to form at least one of the first grid nodes.

[0025] For example, in the first touch metal layer,

[0026] When the number of the first effective patterns is odd, the touch unit has a first virtual center line extending in 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 on the same side of the first virtual center line having the same pattern.

[0027] 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, a first through line in a plurality of the second side effective patterns is 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.

[0028] Exemplarily, in the second touch metal layer,

[0029] 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, a second through line in the fourth center effective pattern passes through the second virtual center line, 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.

[0030] 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, a second through line in a plurality of the fifth side effective patterns is 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.

[0031] Exemplarily, at the non-overlapping node, one of the two grid lines forming 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 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 maintains a separation distance from the two free ends respectively, and the virtual optical compensation line is arranged to overlap with the grid line continuously and uninterruptedly extending at the non-overlapping node.

[0032] Exemplarily, 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 the same material, and a difference between a width of the virtual optical compensation line along a line width direction of the non-through line and the line width of the non-through line is within a threshold value.

[0033] Exemplarily, the separation distance has a size d2 along an extension direction of the corresponding non-through line, and 2 μm≤d2≤50 μm.

[0034] Exemplarily, the break opening has a size d1 along an extension direction of the corresponding non-through line, and 3 μm≤d1≤80 μm.

[0035] Exemplarily,

[0036] The M1 first grid lines in the first touch metal layer are arranged along the second direction in sequence, and two first grid lines located at the outermost periphery are a first peripheral grid line and a second peripheral grid line, wherein the first peripheral grid line and the second peripheral grid line are both floating virtual grid lines, 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.

[0037] Exemplarily, in the first touch metal layer,

[0038] When m1 is even, the m1 first through lines are arranged along the second direction with one first through line every A first grid lines, wherein A is an integer greater than or equal to 0.

[0039] When m1 is odd, the touch unit has a first virtual center line extending along the first direction, at least one first through line passes through the first virtual center line, and the remaining first through lines are symmetrically distributed about the first virtual center line, and among the remaining first through lines, one first through line is arranged every A first grid lines, wherein A is an integer greater than or equal to 0.

[0040] Exemplarily, in the second touch metal layer,

[0041] When n1 is even, the n1 second through lines are arranged along the first direction with one second through line every B second grid lines, wherein B is an integer greater than or equal to 0.

[0042] When n1 is an odd number, the touch unit has a second virtual center line extending along the second direction, at least one of the second through lines passes through the second virtual center line, and the rest of the second through lines are symmetrically distributed about the second virtual center line, and among the rest of the second through lines, every B second grid lines are provided with one second through line, where B is an integer greater than or equal to 0.

[0043] Illustratively, the display substrate includes a plurality of pixel units arranged in an array, and a minimum grid unit formed by the first touch metal layer and the second touch metal layer has a normal projection on the display substrate that surrounds a periphery of P1xP2 pixel units, where P1 and P2 are both positive integers greater than or equal to 1.

[0044] Illustratively, a line width of at least part of the grid lines ranges from 2 to 8 μm.

[0045] Illustratively, at least one of the first through lines and the second through lines is configured to include a wide line segment region and a narrow line segment region, the narrow line segment region has a line width smaller than that of the wide line segment region, and the narrow line segment region of one of the first through lines and the second through lines overlaps with a normal projection on the display substrate of the other to form the bridge point.

[0046] Illustratively, the line width of the wide line segment region ranges from 2 to 8 μm, and the line width of the narrow line segment region ranges from 2 to 6 μm.

[0047] Illustratively, a difference between the line width of the narrow line segment region and the line width of the wide line segment region ranges from 0.5 to 4 μm.

[0048] Illustratively, m1≥3 and n1≥3.

[0049] Illustratively, a size of a normal projection on the display substrate of the touch unit is 6 mm≥x0≥3 mm and 6 mm≥y0≥3 mm, where y0 is a size of the normal projection on the display substrate of the touch unit in the first direction, and x0 is a size of the normal projection on the display substrate of the touch unit in the second direction.

[0050] In a second aspect, the embodiments of the present disclosure further provide a display device including the touch display substrate as described above.

[0051] The embodiments of the present disclosure have the following beneficial effects:

[0052] In the above scheme, the touch control layer of the touch control display substrate includes at least a first touch control metal layer and a second touch control metal layer, each of the metal mesh layers includes a plurality of mesh lines intersecting in a mesh structure along a first direction and a second direction, the first touch control metal layer is provided with first through lines, the second touch control metal layer is provided with second through lines, the first through lines and the second through lines extend in directions intersecting each other, so as to overlap each other in orthographic projection on the display substrate, and form a plurality of bridge points, and the first touch control metal layer and the second touch control metal layer are insulated from each other, one of the first through lines and the second through lines is used for transmitting and receiving touch control signals, and the other is used for transmitting and sending touch control signals, so that the patterns of the two kinds of touch control signals are distributed in the two metal mesh patterns, and the signal lines of the two kinds of touch control signals are uniformly and densely distributed in the touch control unit, so as to increase the signal amount generated by the active pen, and since the metal mesh patterns of the two kinds of touch control signals are uniformly distributed in the touch control unit, the signal amount is the same or close when the active pen passes through different areas of the touch control unit, so as to improve the touch control accuracy, sensitivity and linearity of the active pen. BRIEF DESCRIPTION OF DRAWINGS

[0053] Fig. 1 shows a schematic diagram of a mesh pattern of one touch control unit in a touch control display substrate provided by an embodiment of the present disclosure;

[0054] Fig. 2 shows a schematic diagram of a mesh pattern of a first touch control metal layer in one touch control unit in a touch control display substrate provided by an embodiment of the present disclosure;

[0055] Fig. 3 shows a schematic diagram of a mesh pattern of a second touch control metal layer in one touch control unit in a touch control display substrate provided by an embodiment of the present disclosure;

[0056] Fig. 4 shows a schematic diagram of a mesh pattern of a first touch control metal layer in one touch control unit in a touch control display substrate provided by an embodiment of the present disclosure;

[0057] Fig. 5 shows a schematic diagram of a mesh pattern of a second touch control metal layer in one touch control unit in a touch control display substrate provided by an embodiment of the present disclosure;

[0058] Fig. 6 shows a partial enlarged schematic diagram of a dashed line frame Q in Fig. 1;

[0059] Fig. 7 shows a partial enlarged schematic diagram of the dashed line frame Q in Fig. 1;

[0060] Fig. 8 shows a partial enlarged view of E in Fig. 4;

[0061] Fig. 9 shows a partial enlarged view of E in Fig. 4;

[0062] Fig. 10 shows a schematic diagram of a cross section along A-A' in Fig. 9;

[0063] Fig. 11 shows a schematic diagram of a cross section along B-B' in Fig. 9;

[0064] Figure 12 shows a partial enlarged view of a grid pattern of one touch unit in a touch display substrate according to an embodiment of the present disclosure;

[0065] Figure 13 shows a partial enlarged view of a grid pattern of one touch unit in a touch display substrate according to an embodiment of the present disclosure;

[0066] Figure 14 shows a partial enlarged view of a grid pattern of one touch unit in a touch display substrate according to an embodiment of the present disclosure;

[0067] Figure 15 shows a schematic view of a grid pattern of one touch unit in a touch display substrate according to an embodiment of the present disclosure;

[0068] Figure 16 shows a partial enlarged view of R1 in Figure 15;

[0069] Figure 17 shows a partial enlarged view of R2 in Figure 15;

[0070] Figure 18 shows a schematic view of 3x3 touch units in a touch display substrate according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0071] In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings 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 those of ordinary skill in the art without creative effort fall within the scope of the present disclosure.

[0072] Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall have the ordinary meaning commonly understood by one 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 a quantity of any number, but indicate the existence of 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 equivalents thereof, and do not exclude other elements or objects. The terms "connected" or "coupled" and similar terms do not limit to physical or mechanical connections or couplings, but can include electrical connections or couplings, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positions, and when the absolute positions of the described objects are changed, the relative positions can also be changed accordingly.

[0073] The terms “parallel,” “perpendicular,” and “same” and the like used in the embodiments of the present disclosure include the strict sense of “parallel,” “perpendicular,” “same” and the like, and “approximately parallel,” “approximately perpendicular,” “approximately same” and the like with a certain tolerance, which, taking into account the measurement and the tolerance related to the measurement of a specific value (for example, the limitation of the measurement system), represents the acceptable deviation range for the specific value determined by the person skilled in the art. For example, “approximately” can represent within one or more standard deviations, or within 3% or 5% of the value.

[0074] In addition, in this document, unless otherwise defined, the terms “substantially,” “essentially,” “approximately,” and “about” are used to describe and account for small variations. When used with an event or circumstance, these terms can cover the event or circumstance that occurs exactly, as well as the event or circumstance that occurs approximately. For example, when used with a numerical value, these terms can include a range of variation of the numerical value less than or equal to 10%, 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 mean that two surfaces are arranged along the same plane within the micrometer range, for example, within 40 μm, 30 μm, 20 μm, 10 μm or 1 μm along the same plane.

[0075] 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 arranged 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.

[0076] 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:

[0077] The 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, hovering touch, buttons, etc., and has a wider range of application scenarios and prospects than passive pens.

[0078] However, in the related art, the accuracy and linearity of a medium or large size touch screen using an active pen for touch control are poor, which affects the touch performance of the active pen.

[0079] In order to improve the above problems, the touch display substrate and the display device provided in the embodiments of the present disclosure can improve the touch performance of the touch display product.

[0080] The touch display substrate provided in the embodiments of the present disclosure can be touched by a stylus pen, but the application scenarios of the touch display substrate are not limited thereto. For example, the touch display substrate can also be applied to a finger touch scenario.

[0081] FIGS. 10 and 11 are schematic diagrams of partial cross-sectional structures of the touch display substrate provided in the embodiments of the present disclosure.

[0082] Referring to FIGS. 10 and 11, the touch display substrate provided in the embodiments of the present disclosure includes a display substrate 100 and a touch layer 200, and the touch layer 200 is located on the display side of the display substrate 100.

[0083] Referring to FIGS. 1 to 5 and 18, 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 includes a first touch metal layer TMA and a second touch metal layer TMB, and the first touch metal layer TMA and the second touch metal layer TMB are different layers and are arranged to be insulated from each other. Either the first touch metal layer TMA or the second touch metal layer TMB includes a plurality of grid lines DL crossing in a first direction Y and a second direction X in a mesh shape, that is, either the first touch metal layer TMA or the second touch metal layer TMB has a grid pattern.

[0084] The plurality of grid lines DL of the first touch metal layer TMA at least include m1 first through lines 210 penetrating the touch unit D along the first direction Y; the plurality of grid lines DL of the second touch metal layer TMB at least include n1 second through lines 220 penetrating the touch unit D along the second direction X; one of the first through lines 210 and the second through lines 220 is used to transmit a touch transmission signal (as a TX channel), and the other is used to transmit a touch reception signal (as an RX channel), and the orthographic projection of the m1 first through lines 210 and the n1 second through lines 220 on the display substrate 100 overlap with each other to form m1×n1 bridge points 230, and m1 and n1 are both positive integers greater than or equal to 1.

[0085] In the above scheme, the touch layer 200 of the touch display substrate 100 includes at least a first touch metal layer TMA and a second touch metal layer TMB, each of the metal mesh layers includes a plurality of mesh lines DL crossing in a mesh structure along a first direction Y and a second direction X, the plurality of mesh lines DL in the first touch metal layer TMA includes m1 first through lines 210, the plurality of mesh lines DL in the second touch metal layer TMB includes n1 first through lines 210, the first through lines 210 and the second through lines 220 cross in the extending direction and overlap each other in the orthographic projection on the display substrate 100, and the overlapping area of one first through line 210 and one second through line 220 forms a bridge point 230, that is, m1 first through lines 210 and n1 first through lines 210 cross each other and form m1 x n1 bridge points 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 lines 210 and the second through lines 220 is used for transmitting and receiving touch signals, and the other is used for transmitting and sending touch signals. In this way, two kinds of touch signals are transmitted through the mesh patterns of the two metal mesh layers respectively, which can realize the purpose that the signal lines of the two kinds of touch signals are uniformly and densely distributed in the touch unit D, thereby increasing the signal amount when the active pen passes through the touch unit D. At the same time, since the mesh patterns of the two kinds of touch signals are uniformly and densely distributed 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.

[0086] 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.

[0087] FIG. 2 shows a mesh pattern diagram of the first touch metal layer TMA in some embodiments; and FIG. 3 shows a mesh pattern diagram of the second touch metal layer TMB in some embodiments.

[0088] Referring to FIGS. 1 and 2, the plurality of mesh lines DL of the first touch metal layer TMA includes M1 first mesh lines DL1 extending along the first direction Y and N1 second mesh lines DL2 extending along the second direction X, wherein m1 first mesh lines DL1 pass through the entire touch unit D along the first direction Y and are used as the m1 first through lines 210, m1 ≤ M1, and M1 and N1 are positive integers greater than or equal to 1.

[0089] Please refer to FIG. 1 and FIG. 3, 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 n1 second through lines 220, wherein n1 ≤ N2, M2 and N2 are positive integers greater than or equal to 1.

[0090] Please refer to FIG. 1 to FIG. 3, 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.

[0091] 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.

[0092] Please refer to FIG. 1 to FIG. 6, 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' with a break opening V.

[0093] For example, in the first touch metal layer TMA, M1 first grid lines DL1 further include m2 first non-through lines DL1' with a break opening V, and N1 second grid lines DL2 include n2 second non-through lines DL2' with a break opening 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.

[0094] In the second touch metal layer TMB, M2 third grid lines DL3 include m3 third non-through lines DL3' with a break opening V, and N2 fourth grid lines DL4 include n4 fourth non-through lines DL4' with a break opening 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).

[0095] Exemplarily, taking the first touch metal layer TMA shown in FIG. 2 as an example, 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 exemplary embodiment, the third through line DLC and the fourth through line DLD are located at the outermost periphery of the touch unit D and are respectively located at two opposite sides of the touch unit D along the first direction Y.

[0096] Exemplarily, taking the second touch metal layer TMB shown in FIG. 3 as an example, 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 are crossed with and connected to the fifth through lines DLE. As an exemplary embodiment, the plurality of fifth through lines DLE are uniformly arranged in the touch unit D.

[0097] The (M1+M2)×(N1+N2) grid nodes S include: a plurality of first grid nodes S1 formed by the grid lines DL in the same layer of metal grid layer being crossed; and a plurality of second grid nodes S2 formed by the grid lines DL in different layers of metal grid layer being crossed; wherein the plurality of second grid nodes S2 include m1×n1 bridge points 230 and non-overlapping nodes 231 other than the bridge points 230; for any non-overlapping node 231, at least one of the two grid lines DL crossing 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 breakage opening V at least at the non-overlapping node 231.

[0098] In the above scheme, some non-through lines DL' are provided in the grid lines DL in each layer of metal grid layer, and the breakage openings V are provided on the non-through lines DL', and by reasonably arranging the positions of the breakage 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.

[0099] The effective pattern of the touch unit D can specifically refer to a touch pattern that can be recognized by touch within a certain touch area.

[0100] Please refer to FIG. 1 and FIG. 6, in some embodiments, for some of the non-overlapped nodes 231, both of the two grid lines DL crossing to form the non-overlapped node 231 are non-through lines DL', and both of the two non-through lines DL' are provided with a breakage V at least at the non-overlapped node 231; please refer to FIG. 14, in some other embodiments, for some of the non-overlapped nodes 231, one of the two grid lines DL crossing to form the non-overlapped node 231 is a non-through line DL', and is provided with a breakage V at the non-overlapped node 231, and the other one continuously extends at the non-overlapped node 231 and passes through the breakage V.

[0101] The following will specifically describe how to obtain the target effective pattern of the touch unit D by reasonably arranging the positions of the breakages V on the two touch metal layers in different regions in combination with some exemplary embodiments.

[0102] As an exemplary embodiment, as shown in FIG. 2, in one of the touch units D, the effective pattern of the first touch metal layer TMA includes a plurality of first effective patterns 2100, and one of the first effective patterns 2100 corresponds to at least one of the first through lines 210. For example, please refer to FIG. 2, 1 of the first effective patterns 2100 corresponds to 1 of the first through lines 210.

[0103] 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 on the first trunk pattern 211, and the first branch pattern 212 at least includes a first line segment 2121, the first line segment 2121 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 crossing 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 which has a cross connection with the first trunk pattern 211.

[0104] As shown in FIG. 3, in one of the touch units D, the effective pattern of the second touch metal layer TMB includes a plurality of second effective patterns 2200, and one of the second effective patterns 2200 corresponds to at least one of the second through lines 220. For example, please refer to FIG. 3, 1 of the second effective patterns 2200 corresponds to 1 of the second through lines 220.

[0105] 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 intersecting with the second stem pattern 221 to form the first grid node S1.

[0106] As an exemplary embodiment, as shown in FIG. 2, in one of the touch units D, in the first touch metal layer TMA, at least part of the first effective pattern 2100 further includes a plurality of first cross-line units 2122 formed by the non-through-line DL' in the first touch metal layer TMA being disconnected, the first cross-line unit 2122 includes a third line segment 21221 and a fourth line segment 21222, the third line segment 21221 and the fourth line segment 21222 intersect 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 intersects with the third line segment 21221 to form at least one first grid node.

[0107] For example, as shown in FIG. 2, a first cross-line unit 2122 can be a “cross” line pattern formed by the third line segment 21221 and the fourth line segment 21222 intersecting, as shown in the dashed box J in FIG. 2.

[0108] 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.

[0109] As shown in FIG. 3, in the second touch metal layer TMB, at least part of the second effective pattern 2200 further includes a plurality of second cross-line units 2222 formed by the non-through-line DL' in the second touch metal layer TMB being disconnected, the second cross-line unit 2222 includes a fifth line segment 22221 and a sixth line segment 22222 intersecting to form at least one first grid node S1

[0110] The fifth line segment 22221 and the sixth line segment 22222 intersect 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 intersects with the second line segment 2221 to form at least one first grid node.

[0111] For example, as shown in the dashed box K in FIG. 3, one of the second cross-line units 2222 can be a "cross" pattern formed by the intersection of the fifth line segment 22221 and the second line segment 2221.

[0112] 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.

[0113] In addition, as an exemplary embodiment, as shown in FIG. 2, when the number of the first effective patterns 2100 in the first touch metal layer TMA is odd, the touch 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 through lines 210 in the first center effective pattern 2100A pass through the first virtual center line O1, the first through 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, by setting the breakage opening V, the first effective pattern 2100 with a relatively uniform pattern can be obtained.

[0114] In addition, as an exemplary embodiment, taking the first touch metal layer TMA shown in FIG. 4 as an example, 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, and the first effective patterns 2100 are distributed on opposite sides of the first virtual center line O1 along the second direction X. The two first effective patterns 2100 closest to the first virtual center line O1 are a second center effective pattern 2100C and a third center effective pattern 2100D, respectively, and the rest of the first effective patterns 2100 are second side effective patterns 2100F. The patterns of the second center effective pattern 2100C and the third center effective pattern 2100D are the same, and the first through lines 210 in the second side effective patterns 2100F are mirror symmetric about the first virtual center line O1.

[0115] For example, the patterns of the second side effective patterns 2100F located on the same side of the first virtual center line O1 are the same, and every A first non-through line DL1' is provided with one first through line 210, in other words, the first through lines 210 are arranged uniformly at a certain period. In the above scheme, by setting the breakage opening V, the first effective pattern 2100 with a relatively uniform pattern can be obtained.

[0116] However, it should be understood that the above is only an exemplary description of the pattern of the first effective pattern 2100, and for the specific pattern of the first effective pattern 2100, the desired target effective pattern can be obtained by adjusting the setting of the disconnection opening V.

[0117] In addition, as an exemplary embodiment, taking the second touch metal layer TMB shown in FIG. 5 as an example, 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 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, the second through lines 220 in the fourth center effective pattern 2200A pass through the second virtual center line O2, and the second through lines 220 in the fourth side effective patterns 2200B are mirror symmetric about the second virtual center line O2. In the above scheme, by setting the disconnection opening V, the second effective pattern 2200 with relatively uniform patterns can be obtained.

[0118] In addition, as an exemplary embodiment, taking the second touch metal layer TMB shown in FIG. 3 as an example, 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, and several of the second effective patterns 2200 are distributed on the 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 a fifth center effective pattern 2200C and a sixth center effective pattern 2200D, respectively, and the rest of the second effective patterns 2200 are fifth side effective patterns 2200E, wherein the fifth center effective pattern 2200C and the sixth center effective pattern 2200D have the same pattern, and the second through lines 220 in several of the fifth side effective patterns 2200E are mirror symmetric about the second virtual center line O2. In the above scheme, by setting the disconnection opening V, the second effective pattern 2200 with relatively uniform patterns can be obtained.

[0119] However, it should be understood that the above is only an exemplary description of the pattern of the second effective pattern 2200, and for the specific pattern of the second effective pattern 2200, the desired target effective pattern can be obtained by adjusting the setting of the disconnection opening V.

[0120] It should also be noted that the effective patterns in each touch metal layer are designed based on the principle of uniform distribution to improve touch uniformity.

[0121] For example, based on the performance consideration of the visualization, each of the first effective patterns 2100 in the touch metal layer can be patterned the same; likewise, each of the second effective patterns 2200 in the touch metal layer can be patterned the same.

[0122] In addition, the applicant of the present disclosure has found through research that in the related art, the grid pattern in the touch display substrate 100 generally has a smallest 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.

[0123] To improve the above problems, as an exemplary embodiment of the present disclosure, as shown in FIG. 7, the display substrate 100 includes a plurality of pixel units 400 arranged in an array, each of which can include at least two sub-pixels Pexl. The smallest 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 that surrounds the periphery of J1xJ2 pixel units 400, where J1 and J2 are both positive integers greater than or equal to 1.

[0124] With the above scheme, by arranging a smallest grid unit T to surround the periphery of at least two pixel units 400, the metal density in the touch unit D can be reduced, thereby reducing the load capacitance C of the touch unit D.

[0125] For example, the value of J1 can be 1-100, and the value of J2 can be 1-100, i.e., a smallest grid unit T corresponds to the periphery of 1x1-100x100 pixel units 400.

[0126] In actual applications, 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.

[0127] Please refer to the embodiment shown in FIG. 7, which illustrates a smallest grid unit T corresponding to the periphery of 2x2 pixel units 400.

[0128] In addition, as an exemplary embodiment, 200≥m1≥1, 200≥n1≥1. That is, in one of the touch units D, the number of first through-lines 210 is 1-200, and the number of second through-lines 220 is 1-200.

[0129] According to the physical law of the parallel metal resistance reduction, 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; and when the number of the first through lines 210 or the second through lines 220 in the touch unit D is small, if the through line is broken due to the process, the signal connected to the broken position is floating, which will cause the abnormal capacitance of the RX channel or the TX channel corresponding to the broken position.

[0130] Therefore, in order to improve the above problems, as some exemplary embodiments, m1≥3, n1≥3.

[0131] 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.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] In the touch display substrate 100 provided by the embodiments of the present disclosure, there are m1×n1 bridge points 230 in the touch unit D, 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.

[0136] In order to improve the above problems, as an exemplary embodiment, as shown in FIG. 8, 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, and the narrow line segment area 200b of one of the first through line 210 and the second through line 220 overlaps with the orthographic projection of the other on the display substrate 100 to form the bridge point 230.

[0137] 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 large number of bridge points 230, so as to properly increase the capacitance Δcm and improve the touch performance.

[0138] For example, the line width of the wide line segment area 200a ranges from 2 μm to 8 μm, and the line width of the narrow line segment area 200b ranges from 2 μm to 6 μm.

[0139] FIG. 8 shows a stacked pattern 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. As an example, the line width c of the wide limited segment area of the first through line 210 ranges from 2 μm to 8 μm, and the line width d of the wide limited segment area 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 wide limited segment area of the first through line 210 ranges from 2 μm to 6 μm, and the line width b of the wide limited segment area of the first through line 210 ranges from 2 μm to 6 μm.

[0140] As an example, 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 μm to 4 μm.

[0141] It should be noted that different line widths have different effects on the load capacitance C of the touch unit D. In actual applications, the line width of the grid line DL can be selected according to the capacitance extraction result (RCE) and the bridge point 230 position.

[0142] FIG. 9 shows a partial pattern of the touch layer 200 at the bridge point 230 position in an embodiment, FIG. 10 shows a cross-sectional structure of A-A' in the figure, and FIG. 11 shows a cross-sectional structure of B-B' in the figure.

[0143] As shown in FIGS. 9 to 11, the display substrate 100 can be provided with a thin film packaging layer 500, and the touch layer 200 can be arranged on the side of the thin film packaging layer 500 away from the display substrate 100. The touch layer 200 includes a first touch metal layer TMA, an insulating layer 700, a second touch metal layer TMB, and the like, which are sequentially stacked in the direction away from the display substrate 100.

[0144] It should be noted that FIG. 8 only shows a schematic diagram of the first through line 210 and the second through line 220 both being provided with the narrow line segment area 200b at the bridge point 230, however, in other embodiments not shown, only one of the first through line 210 and the second through line 220 can be provided with the narrow line segment area 200b.

[0145] It should be further noted that, as shown in FIG. 10, the first touch metal layer TMA is located on the side of the second touch metal layer TMB close to the display substrate 100, however, 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 the side of the second touch metal layer TMB away from the display substrate 100.

[0146] In addition, as an exemplary embodiment, as shown in FIG. 13, at the non-overlapping node 231, at least one of the non-through lines DL' forming the non-overlapping node 231 is disconnected by the disconnection opening V, and two free ends 231a are formed. At the position of the disconnection opening V, there is a risk of static electricity.

[0147] In order to reduce the risk of static electricity, as some exemplary embodiments of the present disclosure, the size d1 of the disconnection opening V along the extension direction of the non-through line DL' is: 3 μm≤d1≤80 μm. In this way, the size of the disconnection opening V is larger, which can reduce the risk of static electricity through between the two free ends 231a.

[0148] However, although the size of the disconnection opening V is enlarged, the static electricity phenomenon can be improved, but if the size of the disconnection opening V is too large, it will be not conducive to the improvement of the shadow phenomenon. This is because, in the touch display substrate 100, the grid line DL in the touch unit D is surrounded outside the pixel unit 400 of the display substrate 100, and the grid has certain interference, diffraction and other effects on light. If the size of the disconnection opening V is larger, the area of the pixel unit 400 around the disconnection opening V will have some differences in optical effect compared with other areas, and these optical differences can be easily observed at some viewing angles or angles, i.e., there is a shadow phenomenon.

[0149] Therefore, in order to improve the phenomenon of shadow elimination, as an exemplary embodiment, as shown in FIG. 12, at the non-overlapping node 231, one of the two grid lines DL forming the non-overlapping node 231 continuously and uninterruptedly extends at the breakage V, and the other grid line is a non-through line, and the non-through line DL' is broken by the breakage V, thereby forming two free ends 231a; wherein, a virtual optical compensation line 600 is further arranged at the breakage 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 keeps a separation distance d2 from the two free ends 231a respectively, and the virtual optical compensation line 600 is arranged to overlap the grid line DL continuously and uninterruptedly extending at the non-overlapping node.

[0150] By arranging the virtual optical compensation line 600 at the breakage V, the vacancy area at the breakage V can be optically compensated, so as to reduce the optical difference between the breakage V and the positions of the other grid lines DL, thereby improving the phenomenon of shadow elimination.

[0151] 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.

[0152] As an exemplary embodiment, as shown in FIG. 12, the virtual optical compensation line 600 and the non-through line DL' forming the breakage V at the non-overlapping node 231 are arranged to be of 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.

[0153] By the above scheme, the virtual optical compensation line 600 arranged at the breakage V can be arranged to be of the same layer and the same material as the non-through line DL' forming the breakage V, and only a separation distance between the virtual optical compensation line 600 and the non-through line DL' is kept, so that the process steps can not be increased.

[0154] As an exemplary embodiment, the separation distance d2 has a size d2 along the extension direction of the corresponding non-through line DL' as follows: 2 μm≤d2≤50 μm. Of course, it can be understood that the specific value of the separation distance d2 can be selected in combination with the actual product structure, and is not limited thereto.

[0155] 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.

[0156] 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.

[0157] In addition, as an exemplary embodiment, as shown in FIGS. 15-17, 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.

[0158] With the above scheme, the first grid lines arranged on the opposite sides in the second direction X in the touch unit D can be respectively arranged as the first peripheral grid line DLA and the second peripheral grid line DLB. 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.

[0159] 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.

[0160] 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.

[0161] 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.

[0162] As an exemplary embodiment, as shown in FIG. 18, in a touch control area including 3×3 touch control units D, the first or second peripheral grid line DLA of at least one of the touch control 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.

[0163] In addition, as an exemplary embodiment, as shown in FIG. 1, the size of the orthographic projection of the touch control 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 control unit D on the display substrate 100 along the first direction Y, and x0 is the size of the orthographic projection of the touch control unit D on the display substrate 100 along the second direction X. By using the above scheme, the touch control display substrate 10 can have better touch control accuracy. However, the specific size of the touch control unit D is not limited thereto.

[0164] In the touch control 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 control layer 200, the more conducive to shadow elimination and improvement, and the more uniform the touch control patterns corresponding to the RX and TX channels.

[0165] In some example embodiments of the present disclosure, as shown in FIG. 4, 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 uniformly 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.

[0166] In some example embodiments of the present disclosure, as shown in FIG. 2, 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 uniformly 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.

[0167] As an example embodiment, please refer to FIG. 1 and FIG. 2, 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.

[0168] 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.

[0169] Similarly, as shown in FIG. 3, 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.

[0170] In other example embodiments of the present disclosure, as shown in FIG. 5, 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.

[0171] Please refer to FIG. 1 and FIG. 3, 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.

[0172] 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.

[0173] 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.

[0174] The following points need to be explained:

[0175] (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.

[0176] (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.

[0177] (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.

[0178] 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 substrate comprises: a display substrate; a touch layer located on the display side of the display substrate, the orthographic projection of the touch layer on the display substrate comprising a plurality of touch units arranged in an array, each of the touch units comprising at least a first touch metal layer and a second touch metal layer arranged in isolation from each other, the first touch metal layer and the second touch metal layer each comprising a plurality of grid lines arranged in a mesh shape along a first direction and a second direction; wherein the plurality of grid lines of the first touch metal layer comprises at least m1 first through lines penetrating the touch unit along the first direction, and the plurality of grid lines of the second touch metal layer comprises at least n1 second through lines penetrating the touch unit along the second direction, one of the first through lines and the second through lines being used for transmitting a touch transmission signal, and the other being used for transmitting a touch reception signal, the orthographic projection of the m1 first through lines and the n1 second through lines on the display substrate overlapping each other to form m1×n1 bridge points, m1 and n1 each being a positive integer greater than or equal to 1.

2. The touch display substrate according to claim 1, wherein the plurality of grid lines of the first touch metal layer comprises 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 comprises 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; wherein the M1 first grid lines comprise m1 first through lines, the N2 fourth grid lines comprise n1 second through lines, m1≤M1, n1≤N2, and M1, M2, N1, N2 each are a positive integer greater than or equal to 1. 3.The touch display substrate of claim 2, wherein, at least one of the first touch metal layer and the second touch metal layer further comprises a plurality of non-through lines having a breakage opening; the (M1+M2)×(N1+N2) grid nodes comprise: 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 the plurality of second grid nodes comprises 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 at least one of the non-through lines has a breakage opening at least at the non-overlapping node. 4.The touch display substrate of claim 3, wherein, ​ The effective 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; The effective 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. 5.The touch display substrate of claim 4, wherein, 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 arranged on the same non-through line as the first line segment or in parallel, the fourth line segment intersecting 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 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 arranged on the same non-through line as the second line segment or in parallel, the fifth line segment intersecting the sixth line segment to form at least one of the first grid nodes. In the first touch metal layer, 6.The touch display substrate of claim 5, wherein, 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 lines in the first center effective pattern passing through the first virtual center line, the first through lines in the first side effective patterns being mirror-symmetrical about the first virtual center line, and the first side effective patterns 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. 7.The touch display substrate of claim 5, 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 orthogonal projection of the virtual optical compensation line on the display substrate is located between the two free ends and maintains a separation distance with the two free ends respectively, and the virtual optical compensation line is arranged to overlap with the grid line continuously and uninterruptedly extending at the non-overlapping node. 8.The touch display substrate of claim 3, 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. 9.The touch display substrate of claim 8, wherein, The separation distance has a size d2 in the extension direction of the corresponding non-through line: 2μm≤d2≤50μm. 10.The touch display substrate of claim 8, wherein, ​ 11.The touch display substrate of claim 3, wherein, The size d1 of the breakage opening in the extension direction of the corresponding non-through line is 3 μm ≤ d1 ≤ 80 μm. 12.The touch display substrate of claim 3, wherein, The M1 first grid lines in the first touch control metal layer are arranged in the second direction in sequence, and the two outermost first grid lines 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 floating virtual grid lines, and at least one of the first peripheral grid line and the second peripheral grid line is configured to have at least one breakage opening in the first direction. 13.The touch display substrate of claim 2, wherein, In the first touch control metal layer, When m1 is even, the m1 first through lines are arranged with one first through line every A first grid lines in the second direction, wherein A is an integer greater than or equal to 0. When m1 is odd, the touch control unit has a first virtual center line extending in the first direction, at least one first through line passes through the first virtual center line, and the remaining first through lines are symmetrically distributed about the first virtual center line, and among the remaining first through lines, one first through line is arranged every A first grid lines, wherein A is an integer greater than or equal to 0. 14.The touch display substrate of claim 2, wherein, In the second touch control metal layer, When n1 is even, the n1 second through lines are arranged with one second through line every B second grid lines in the first direction, wherein B is an integer greater than or equal to 0. When n1 is odd, the touch control unit has a second virtual center line extending in the second direction, at least one second through line passes through the second virtual center line, and the remaining second through lines are symmetrically distributed about the second virtual center line, and among the remaining second through lines, one second through line is arranged every B second grid lines, wherein B is an integer greater than or equal to 0. 15.The touch display substrate of claim 1, wherein, The display substrate includes a plurality of pixel units arranged in an array, and a minimum grid unit formed by the first touch control metal layer and the second touch control metal layer has a normal projection on the display substrate that surrounds the periphery of P1×P2 pixel units, wherein P1 and P2 are both positive integers greater than or equal to 1. 16.The touch display substrate of claim 1, wherein, The line width of at least part of the grid lines is in the range of 2-8 μm. 17.The touch display substrate of claim 1, wherein, At least one of the first through line and the second through line is configured to include a wide line segment region and a narrow line segment region, the line width of the narrow line segment region is smaller than the line width of the wide line segment region, and the normal projection of the narrow line segment region of one of the first through line and the second through line on the display substrate overlaps the normal projection of the other one to form the bridge point. 18.The touch display substrate of claim 17, wherein, The line width of the wide line segment region is in the range of 2-8 μm, and the line width of the narrow line segment region is in the range of 2-6 μm. 19.The touch display substrate of claim 18, wherein, The difference between the line width of the narrow line segment region and the line width of the wide line segment region is in the range of 0.5-4 μm. 20.The touch display substrate of claim 1, wherein, m1 ≥ 3, and n1 ≥ 3. 21.The touch display substrate of claim 1, wherein, A size of a orthographic projection of the touch unit on the display substrate is: 6mm≥x0≥3mm, 6mm≥y0≥3mm, y0 is a size of the orthographic projection of the touch unit on the display substrate in the first direction, and x0 is a size of the orthographic projection of the touch unit on the display substrate in the second direction.

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

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