Metal grid, touch substrate and touch display device

Abstract

The metal grid, the touch substrate and the touch display device are provided, the metal grid comprises a plurality of first wires and a plurality of second wires, the first wires and the second wires intersect with each other, intersection points of the first wires and the second wires are arranged in an array, any two adjacent first wires and any two adjacent second wires define a grid, and the first wires and the second wires are arranged in the grid. For any intersection point, a first adjacent intersection point adjacent to the intersection point exists on the first route where the intersection point is located, a second adjacent intersection point adjacent to the intersection point exists on the second route where the intersection point is located, and the distance between the intersection point and the first adjacent intersection point is different from the distance between the intersection point and the second adjacent intersection point.

Description

Technical Field

[0001] The utility model relates to a display technology, and particularly to a metal mesh, a touch control substrate and a touch display device. Background Art

[0002] The metal mesh touch panel is a common touch control solution for an external touch display device. In a touch display device including a metal mesh touch panel, the touch control layer is located on the display side of the display panel, and the touch control layer includes at least one layer of metal mesh. With the development of display technology, the pixel density of the display panel is getting higher and higher. When a high-PPI display panel is paired with a metal mesh touch panel, moiré patterns are often generated due to the periodic interference between the metal mesh lines and the pixel units, reducing the display image quality. Summary of the Utility Model

[0003] On the one hand, the present disclosure provides a metal mesh, including a plurality of first traces and a plurality of second traces intersecting each other, wherein the intersections of the plurality of first traces and the plurality of second traces are arranged in an array, and any adjacent two first traces and any adjacent two second traces enclose a grid. For any intersection, there is a first adjacent intersection adjacent to the intersection on the first trace where the intersection is located, and there is a second adjacent intersection adjacent to the intersection on the second trace where the intersection is located, and the distance from the intersection to the first adjacent intersection is different from the distance from the intersection to the second adjacent intersection.

[0004] Optionally, the intersection includes: a main body part; a first extension part and a third extension part, which are located on the first trace and extend away from the main body part from two opposite corner parts of the main body part; and a second extension part and a fourth extension part, which are located on the second trace and extend away from the main body part from the other two opposite corner parts of the main body part, wherein the first extension part, the second extension part, the third extension part and the fourth extension part are arranged around the main body part in sequence around the main body part.

[0005] Optionally, the main body part is a quasi-square, the sides of the quasi-square are concave towards the center of the quasi-square, the center lines of the first extension part and the third extension part coincide with each other, and the center lines of the second extension part and the fourth extension part coincide with each other.

[0006] Optionally, the center lines of the first extension part and the third extension part are perpendicular to the center lines of the second extension part and the fourth extension part.

[0007] Optionally, the first extension part, the second extension part, the third extension part, and the fourth extension part are respectively connected to a connection line, the connection line includes a first straight line segment LS1 and a second straight line segment connected together, the first extension part, the second extension part, the third extension part, and the fourth extension part are respectively connected to the corresponding second straight line segment, and the first straight line segment LS1 is located on a side of the second straight line segment away from the intersection point.

[0008] Optionally, the first extension part, the second extension part, the third extension part, and the fourth extension part respectively form a first angle with the corresponding second straight line segment, each of the first angles is equal to each other, and the first angle is in the range of 135° to 180°.

[0009] Optionally, the second straight line segment corresponding to the first extension part is bent in a direction close to the second extension part with respect to the first extension part; the second straight line segment corresponding to the second extension part is bent in a direction close to the first extension part with respect to the second extension part; the second straight line segment corresponding to the third extension part is bent in a direction close to the fourth extension part with respect to the third extension part; and the second straight line segment corresponding to the fourth extension part is bent in a direction close to the third extension part with respect to the fourth extension part.

[0010] Optionally, each of the second straight line segments corresponding to the first extension part, the second extension part, the third extension part, and the fourth extension part has a different length.

[0011] Optionally, the first straight line segment LS1 and the second straight line segment form a second angle, and for the first extension part, the second extension part, the third extension part, and the fourth extension part, each of the second angles is not equal to each other, and the second angle is in the range of 135° to 180°.

[0012] Optionally, the extending directions of the two first straight line segments corresponding to the first extension part and the third extension part are not parallel, and / or the extending directions of the two first straight line segments corresponding to the second extension part and the fourth extension part are not parallel.

[0013] Optionally, the first extension part, the second extension part, the third extension part, and the fourth extension part are congruent straight line segments.

[0014] Optionally, in their respective extending directions away from the main body part, the widths of the first extension part, the second extension part, the third extension part, and the fourth extension part first decrease and then increase, so that the first extension part, the second extension part, the third extension part, and the fourth extension part all have concave edges.

[0015] Optionally, the main body part is approximately rectangular, the long side and the short side of the approximately rectangle are concave inward towards the center of the approximately rectangle, and in their respective extending directions away from the main body part, the widths of the first extension part, the second extension part, the third extension part and the fourth extension part first decrease and then increase, so that the first extension part, the second extension part, the third extension part and the fourth extension part all have concave edges.

[0016] Optionally, the intersection points in the same row are not collinear, and / or the intersection points in the same column are not collinear.

[0017] Optionally, the grid formed by any two adjacent first traces and any two adjacent second traces is a quadrilateral, and the quadrilateral includes four intersection points; on the same first trace, the linear distances between any two adjacent intersection points are all different; and / or on the same second trace, the linear distances between any two adjacent intersection points are all different.

[0018] Optionally, the multiple first traces correspond to multiple mutually parallel first virtual lines, and the multiple second traces correspond to multiple mutually parallel second virtual lines, wherein the multiple first virtual lines and the multiple second virtual lines intersect with each other to form multiple virtual intersection points, and any two adjacent first virtual lines and any two adjacent second virtual lines enclose a virtual grid. All the virtual grids are congruent rhombuses or squares. The grid corresponds to the virtual grid one by one, and the intersection point corresponds to the virtual intersection point one by one. Any intersection point is located within a selection area centered on the corresponding virtual intersection point, and the ratio of the area of the selection area to the area of the virtual grid is in the range of 0.01:1 to 0.08:1.

[0019] Optionally, the length of the common perpendicular line segment between two opposite sides of the virtual grid is S, and the angle of the vertex angle opposite to the common perpendicular line segment is A, wherein the value range of S is between 100 μm and 500 μm, and A is greater than or equal to 30° and less than 90°.

[0020] Optionally, the selection area is a rectangle, the length and width of the rectangle are respectively parallel to the two diagonals of the virtual grid, the dimension of the rectangle in the first direction is 2K*S / (Sin(A / 2)), and the dimension of the rectangle in the second direction is 2K*S / (Cos(A / 2)), wherein the first direction is parallel to one diagonal of the virtual grid, the second direction is parallel to the other diagonal of the virtual grid, and K is a constant, and its value range is [0.08, 0.2].

[0021] Optionally, the selection area is circular, and the radius of the circle is K*S / (Sin(A / 2)) or K*S / (Cos(A / 2)), or 0.5*K*(S / Sin(A / 2)+S / Cos(A / 2)), where K is a constant with a value range of [0.08, 0.2]; or the selection area is elliptical, the major axis and minor axis of the ellipse are respectively parallel to two diagonals of the virtual grid, the maximum dimension of the ellipse in the first direction is 2K*S / (Sin(A / 2)), and the maximum dimension of the ellipse in the second direction is 2K*S / (Cos(A / 2)), where the first direction is parallel to one diagonal of the virtual grid, the second direction is parallel to the other diagonal of the virtual grid, and K is a constant with a value range of [0.08, 0.2].

[0022] Optionally, the metal grid includes a plurality of minimum grid repeating units spliced together, and the intersections located in the edge regions of each minimum grid repeating unit have the same offset relative to the corresponding virtual intersections.

[0023] Optionally, the ratio of the area of any grid to the area of the virtual grid is in the range of 0.6:1 to 1.4:1.

[0024] On the other hand, the present disclosure provides a touch control substrate including at least one layer of the above metal grid.

[0025] Optionally, the angle between the first trace and the edge of the touch control substrate is greater than or equal to 20° and less than or equal to 80°, and the angle between the second trace and the edge of the touch control substrate is greater than or equal to 20° and less than or equal to 80°.

[0026] On the other hand, the present disclosure provides a touch display device including: a display panel; and the above touch control substrate, where the touch control substrate is stacked on the display side of the display panel.

[0027] Optionally, the first trace intersects with the data line or gate line in the display panel, the angle between the first trace and the data line or the gate line is greater than or equal to 20° and less than or equal to 80°, the second trace intersects with the data line or the gate line, and the angle between the second trace and the data line or the gate line is greater than or equal to 20° and less than or equal to 80°. Description of the Drawings

[0028] According to various disclosed embodiments, the following drawings are only examples for illustrative purposes and are not intended to limit the scope of the present utility model.

[0029] Figure 1 is a plan view of a touch display device in the related art.

[0030] Figure 2 Shows the moiré pattern of a touch display device in the related art.

[0031] Figure 3 Is a plan view of a metal mesh according to some embodiments of the present disclosure.

[0032] Figure 4A Is Figure 3 An enlarged view of the dashed box area Z in

[0033] Figure 4B Shows Figure 4A Each angle in the metal mesh shown in

[0034] Figure 5 Is for preparing Figure 3 The plan view of the mask for the metal mesh shown in

[0035] Figure 6A Is Figure 5 An enlarged view of the dashed box area X in

[0036] Figure 6B Shows Figure 6A Each angle in the mask shown in

[0037] Figure 7 Is a plan view illustrating a method for designing a mask according to some embodiments of the present disclosure.

[0038] Figure 8A Is a plan view illustrating a method for designing a mask according to some embodiments of the present disclosure.

[0039] Figure 8B Is a plan view illustrating a method for designing a mask according to some embodiments of the present disclosure.

[0040] Figure 9 Is a plan view of a mask according to some embodiments of the present disclosure.

[0041] Figure 10A Is a schematic diagram of a metal mesh according to some embodiments of the present disclosure.

[0042] Figure 10B Is for preparing Figure 10A The schematic diagram of the mask for the metal mesh shown in

[0043] Figure 11A Is a schematic diagram of a metal mesh according to some embodiments of the present disclosure.

[0044] Figure 11B Is for preparing Figure 11A The schematic diagram of the mask for the metal mesh shown in

[0045] Figure 12A Schematic diagram of a metal mesh according to some embodiments of the present disclosure.

[0046] Figure 12B For preparing Figure 12A Schematic diagram of a mask for the metal mesh shown.

[0047] Figure 13A Schematic diagram of a metal mesh according to some embodiments of the present disclosure.

[0048] Figure 13B For preparing Figure 13A Schematic diagram of a mask for the metal mesh shown.

[0049] Figure 14 Schematic diagram showing a touch control substrate according to some embodiments of the present disclosure.

[0050] Figure 15 Schematic diagram showing a touch control display device according to some embodiments of the present disclosure. Detailed implementation manners

[0051] The present disclosure will now be described more specifically with reference to the following embodiments. It should be noted that the following description of some embodiments presented herein is for illustrative and descriptive purposes only. It is not exhaustive or limited to the exact forms disclosed.

[0052] Figure 1 Plan view of a touch control display device in the related art. As Figure 1 shown, the touch control display device includes a display panel and a touch control substrate stacked on the display side of the display panel. The display panel includes a plurality of pixels, and each pixel includes a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. In some embodiments, the display panel is an OLED display panel. In some embodiments, the display panel is a liquid crystal display panel. In some embodiments, the display panel is a micro-LED display panel. In some embodiments, the display panel is a liquid crystal display panel. The touch control substrate includes a metal mesh, and the metal mesh includes a plurality of first traces L1 and a plurality of second traces L2 that intersect each other, wherein the intersection points O of the plurality of first traces L1 and the plurality of second traces L2 are arranged in an array.

[0053] In the related art, when the period of the pixel unit in the display panel is close to the period of the metal mesh in the touch control substrate, moiré patterns are often generated due to the periodic interference between the metal mesh lines and the pixel units, thereby reducing the display image quality. Figure 2 Shows the moiré pattern of a touch control display device in the related art. As Figure 2 shown, the moiré pattern includes various forms such as vertical stripes, oblique stripes, and dot arrays.

[0054] Accordingly, the present disclosure particularly provides a metal mesh, a touch control substrate, and a touch display device, which substantially eliminate one or more problems caused by the limitations and disadvantages of the prior art. On the one hand, the present disclosure provides a metal mesh including a plurality of first traces and a plurality of second traces intersecting each other, wherein intersections of the plurality of first traces and the plurality of second traces are arranged in an array, and any two adjacent first traces and any two adjacent second traces enclose a mesh. For any intersection, there is a first adjacent intersection adjacent to the intersection on the first trace where the intersection is located, and there is a second adjacent intersection adjacent to the intersection on the second trace where the intersection is located, and distances from the intersection to the first adjacent intersection and from the intersection to the second adjacent intersection are different from each other.

[0055] Figure 3 is a plan view of a metal mesh according to some embodiments of the present disclosure. As Figure 3 shown, the metal mesh includes a plurality of first traces L1 and a plurality of second traces L2 intersecting each other, wherein intersections O of the plurality of first traces L1 and the plurality of second traces L2 are arranged in an array. Any two adjacent first traces L1 and any two adjacent second traces L2 enclose a mesh.

[0056] In some embodiments, as Figure 3 shown, for any intersection O, there is a first adjacent intersection AO1 adjacent to the intersection O on the first trace L1 where the intersection O is located, and there is a second adjacent intersection AO2 adjacent to the intersection O on the second trace L2 where the intersection O is located, and distances from the intersection O to the first adjacent intersection AO1 and from the intersection O to the second adjacent intersection AO2 are different from each other.

[0057] Figure 3 shows two first adjacent intersections AO1 corresponding to the intersection O, and distances from the two first adjacent intersections AO1 to the intersection O are different from each other. The two first adjacent intersections AO1 and the intersection O are all located on the first trace L1 where the intersection O is located. Figure 3 shows two second adjacent intersections AO2 corresponding to the intersection O, and distances from the two second adjacent intersections AO2 to the intersection O are different from each other. The two second adjacent intersections AO2 and the intersection O are all located on the second trace L2 where the intersection O is located.

[0058] In some embodiments, for any intersection O, distances from all intersections adjacent to the intersection O to the intersection O are different from each other.

[0059] In some embodiments, the grid formed by any two adjacent first traces L1 and any two adjacent second traces L2 is a quadrilateral, and the quadrilateral includes four intersection points O. In some embodiments, on the same first trace L1, the linear distances between any two adjacent intersection points O are all different; and / or on the same second trace L2, the linear distances between any two adjacent intersection points O are all different.

[0060] Based on the above design, in the metal grid according to the present disclosure, the intersection points O in the same row are not collinear. And / or, in the metal grid according to the present disclosure, the intersection points O in the same column are not collinear. The above-mentioned "same row" and / or "same column" are relative to the array of intersection points O. The virtual intersection points O' corresponding to the intersection points O in the same row are located on the same straight line; the virtual intersection points O' corresponding to the intersection points O in the same column are located on the same straight line. The virtual intersection point O' will be described in detail later.

[0061] Figure 4A Yes Figure 3 An enlarged view of the dashed box area Z in. As Figure 4A shown, in some embodiments, the intersection point includes a main body portion MB, a first extension portion EP1, a second extension portion EP2, a third extension portion EP3, and a fourth extension portion EP4. Among them, the first extension portion EP1, the second extension portion EP2, the third extension portion EP3, and the fourth extension portion EP4 are arranged around the main body portion MB in sequence around the main body portion MB. The first extension portion EP1 and the third extension portion EP3 are located on the first trace L1 and extend away from the main body portion MB from two opposite corner portions of the main body portion MB. The second extension portion EP2 and the fourth extension portion EP4 are located on the second trace L2 and extend away from the main body portion MB from the other two opposite corner portions of the main body portion MB.

[0062] As Figure 4A shown, in some embodiments, the main body portion MB is quasi-square, the sides of the quasi-square are concave inward toward the center of the quasi-square, the center line CL1 of the first extension portion EP1 coincides with the center line CL3 of the third extension portion EP3, and the center line CL2 of the second extension portion EP2 coincides with the center line CL4 of the fourth extension portion EP4. The center lines CL1 / CL3 of the first extension portion EP1 and the third extension portion EP3 are perpendicular to the center lines CL2 / CL4 of the second extension portion EP2 and the fourth extension portion EP4.

[0063] In some embodiments, the first extension EP1, the second extension EP2, the third extension EP3, and the fourth extension EP4 are congruent straight line segments. That is, the lengths d1, d2, d3, and d4 of the first extension EP1, the second extension EP2, the third extension EP3, and the fourth extension EP4 in the direction away from the main body MB are all equal, and the first extension EP1, the second extension EP2, the third extension EP3, and the fourth extension EP4 have the same width in the direction perpendicular to the direction away from the main body MB.

[0064] In some embodiments, as Figure 4A shown, the first extension EP1, the second extension EP2, the third extension EP3, and the fourth extension EP4 are respectively connected to the connecting line. The connecting line includes a first straight line segment LS1 and a second straight line segment LS2 connected together. The first extension EP1, the second extension EP2, the third extension EP3, and the fourth extension EP4 are respectively connected to the corresponding second straight line segment LS2, and the first straight line segment LS1 is located on the side of the second straight line segment LS2 away from the intersection point O.

[0065] In some embodiments, as Figure 4A shown, the second straight line segment LS2 corresponding to the first extension EP1 is bent in the direction closer to the second extension EP2 with respect to the first extension EP1; the second straight line segment LS2 corresponding to the second extension EP2 is bent in the direction closer to the first extension EP1 with respect to the second extension EP2; the second straight line segment LS2 corresponding to the third extension EP3 is bent in the direction closer to the fourth extension EP4 with respect to the third extension EP3; and the second straight line segment LS2 corresponding to the fourth extension EP4 is bent in the direction closer to the third extension EP3 with respect to the fourth extension EP4.

[0066] In some embodiments, as Figure 4A shown, the respective second straight line segments LS2 corresponding to the first extension EP1, the second extension EP2, the third extension EP3, and the fourth extension EP4 have different lengths. As Figure 4A shown, the length c1 of the second straight line segment LS2 corresponding to the first extension EP1, the length c2 of the second straight line segment LS2 corresponding to the second extension EP2, the length c1 of the second straight line segment LS2 corresponding to the third extension EP3, and the length c2 of the second straight line segment LS2 corresponding to the fourth extension EP4 are not equal to each other.

[0067] In Figure 4A it, the dividing lines between the first extension EP1, the second extension EP2, the third extension EP3, the fourth extension EP4 and the main body MB are respectively shown by dashed lines, such as the dashed line BL1. In Figure 4AIn [the figure], the dividing lines between the first extension EP1, the second extension EP2, the third extension EP3, and the fourth extension EP4 and the corresponding second straight line segment LS2 are respectively shown by dashed lines, such as the dashed line BL2. In Figure 4A In [the figure], the dividing line between the first straight line segment LS1 and the second straight line segment LS2 is shown by a dashed line, such as the dashed line BL3.

[0068] Figure 4B shown Figure 4A in [the figure] show the respective angles in the metal grid. As Figure 4B shown, in some embodiments, the first extension EP1, the second extension EP2, the third extension EP3, and the fourth extension EP4 respectively form first angles α1, α2, α3, α4 with the corresponding second straight line segment LS2. That is, the included angle between the center line of the first extension EP1 and the center line of the corresponding second straight line segment LS2 is the first angle α1; the included angle between the center line of the second extension EP2 and the center line of the corresponding second straight line segment LS2 is the first angle α2; the included angle between the center line of the third extension EP3 and the center line of the corresponding second straight line segment LS2 is the first angle α3; the included angle between the center line of the fourth extension EP4 and the center line of the corresponding second straight line segment LS2 is the first angle α4. In some embodiments, the respective first angles α1, α2, α3, α4 are equal to each other.

[0069] In some embodiments, the first angles α1, α2, α3, α4 are in the range of 135° to 180°. For example, the first angles α1, α2, α3, α4 are 135°, 140°, 145°, 150°, 155°, 160°, 165°, 170°, 175°, or 180°.

[0070] As Figure 4B shown, in some embodiments, the first straight line segment LS1 and the second straight line segment LS2 form second angles β1, β2, β3, β4. That is, the included angle between the center line of the first straight line segment LS1 corresponding to the first extension EP1 and the center line of the second straight line segment LS2 is the second angle β1, the included angle between the center line of the first straight line segment LS1 corresponding to the second extension EP2 and the center line of the second straight line segment LS2 is the second angle β2, the included angle between the center line of the first straight line segment LS1 corresponding to the third extension EP3 and the center line of the second straight line segment LS2 is the second angle β3, the included angle between the center line of the first straight line segment LS1 corresponding to the fourth extension EP4 and the center line of the second straight line segment LS2 is the second angle β4. For the first extension EP1, the second extension EP2, the third extension EP3, and the fourth extension EP4, the respective second angles β1, β2, β3, β4 are not equal to each other.

[0071] In some embodiments, the second angle β is in the range of 135° to 180°. For example, the second angles β1, β2, β3, β4 are 135°, 140°, 145°, 150°, 155°, 160°, 165°, 170°, 175°, or 180°.

[0072] As Figure 4B shown, in some embodiments, the extending directions of the two first straight line segments LS1 corresponding to the first extension EP1 and the third extension EP3 are not parallel. The extending directions of the two first straight line segments LS1 corresponding to the second extension EP2 and the fourth extension EP4 are not parallel.

[0073] Figure 5 is for preparing Figure 3 shown is a schematic diagram of a mask for preparing the metal grid as shown. As Figure 5 shown, the mask includes a plurality of first traces L1 and a plurality of second traces L2 that intersect each other, wherein the nodes N of the plurality of first traces L1 and the plurality of second traces L2 are arranged in an array. In some embodiments, as Figure 3 shown, for any node N, there is a first adjacent node AN1 adjacent to the node N on the first trace L1 where the node N is located, and there is a second adjacent node AN2 adjacent to the node N on the second trace L2 where the node N is located, and the distance from the node N to the first adjacent node AN1 is different from the distance from the node N to the second adjacent node AN2.

[0074] Figure 5 shows two first adjacent nodes AN1 corresponding to the node N, and the distances from the two first adjacent nodes AN1 to the node N are different from each other. Figure 5 shows two second adjacent nodes AN2 corresponding to the node N, and the distances from the two second adjacent nodes AN2 to the node N are different from each other.

[0075] In some embodiments, for any node N, the distances from all the nodes adjacent to the node N to the node N are different from each other.

[0076] Based on the above design, in the mask for manufacturing the metal grid according to the present disclosure, the nodes N in the same row are not collinear. Based on the above design, in the mask for manufacturing the metal grid according to the present disclosure, the nodes N in the same column are not collinear.

[0077] Figure 6A is Figure 5 an enlarged view of the dashed box area X in Figure 6AAs shown, in some embodiments, the node includes a main body portion MB', a first extension portion EP1', a second extension portion EP2', a third extension portion EP3' and a fourth extension portion EP4'. Among them, the first extension portion EP1', the second extension portion EP2', the third extension portion EP3' and the fourth extension portion EP4' are arranged around the main body portion MB' in sequence around the main body portion MB'. The first extension portion EP1' and the third extension portion EP3' are located on the first trace L1 and extend away from the main body portion MB' from two opposite corner portions of the main body portion MB'. The second extension portion EP2' and the fourth extension portion EP4' are located on the second trace L2 and extend away from the main body portion MB' from the other two opposite corner portions of the main body portion MB'.

[0078] As Figure 6A shown, in some embodiments, the main body portion MB' is square. The center line CL1' of the first extension portion EP1' coincides with the center line CL3' of the third extension portion EP3', and the center line CL2' of the second extension portion EP2' coincides with the center line CL4' of the fourth extension portion EP4'. The center lines CL1' / CL3' of the first extension portion EP1' and the third extension portion EP3' are perpendicular to the center lines CL2' / CL4' of the second extension portion EP2' and the fourth extension portion EP4'.

[0079] In some embodiments, the first extension portion EP1', the second extension portion EP2', the third extension portion EP3' and the fourth extension portion EP4' are congruent straight line segments. That is, the lengths d of the first extension portion EP1', the second extension portion EP2', the third extension portion EP3' and the fourth extension portion EP4' in the direction away from the main body portion MB' are all equal, and the first extension portion EP1', the second extension portion EP2', the third extension portion EP3' and the fourth extension portion EP4' have the same width in the direction perpendicular to the direction away from the main body portion MB'.

[0080] In some embodiments, as Figure 6A shown, the first extension portion EP1', the second extension portion EP2', the third extension portion EP3' and the fourth extension portion EP4' are respectively connected to connection lines. The connection lines include a first straight line segment LS1' and a second straight line segment LS2' connected together. The first extension portion EP1', the second extension portion EP2', the third extension portion EP3' and the fourth extension portion EP4' are respectively connected to the corresponding second straight line segment LS2', and the first straight line segment LS1' is located on the side of the second straight line segment LS2' away from the node.

[0081] In some embodiments, as Figure 6AAs shown, the second straight segment LS2' corresponding to the first extension EP1' is bent in a direction closer to the second extension EP2' relative to the first extension EP1'; the second straight segment LS2' corresponding to the second extension EP2' is bent in a direction closer to the first extension EP1' relative to the second extension EP2'; the second straight segment LS2' corresponding to the third extension EP3' is bent in a direction closer to the fourth extension EP4' relative to the third extension EP3'; and the second straight segment LS2' corresponding to the fourth extension EP4' is bent in a direction closer to the third extension EP3' relative to the fourth extension EP4'.

[0082] In some embodiments, as Figure 4A shown, the respective second straight segments LS2' corresponding to the first extension EP1', the second extension EP2', the third extension EP3', and the fourth extension EP4' have different lengths.

[0083] In Figure 6A , the dividing lines between the first extension EP1', the second extension EP2', the third extension EP3', the fourth extension EP4' and the main body MB' are respectively shown by dashed lines, such as the dashed line BL1'. In Figure 6A , the dividing lines between the first extension EP1', the second extension EP2', the third extension EP3', the fourth extension EP4' and the corresponding second straight segments LS2' are respectively shown by dashed lines, such as the dashed line BL2'. In Figure 6A , the dividing line between the first straight segment LS1' and the second straight segment LS2' is shown by a dashed line, such as the dashed line BL3'.

[0084] Figure 6B Shows Figure 6A the respective angles in the mask shown in. As Figure 6BAs shown, in some embodiments, the first extension EP1’, the second extension EP2’, the third extension EP3’ and the fourth extension EP4’ form third angles α1’, α2’, α3’, α4’ with the corresponding second straight segment LS2’ respectively. That is, the included angle between the center line of the first extension EP1’ and the center line of the corresponding second straight segment LS2’ is the third angle α1’; the included angle between the center line of the second extension EP2’ and the center line of the corresponding second straight segment LS2’ is the third angle α2’; the included angle between the center line of the third extension EP3’ and the center line of the corresponding second straight segment LS2’ is the third angle α3’; the included angle between the center line of the fourth extension EP4’ and the center line of the corresponding second straight segment LS2’ is the third angle α4’. In some embodiments, the respective third angles α1’, α2’, α3’, α4’ are equal to each other and are equal to the respective first angles α1, α2, α3, α4.

[0085] In some embodiments, the third angles α1’, α2’, α3’, α4’ are in the range of 135° to 180°. For example, the third angles α1’, α2’, α3’, α4’ are 135°, 140°, 145°, 150°, 155°, 160°, 165°, 170°, 175°, or 180°.

[0086] As Figure 6B shown, in some embodiments, the first straight segment LS1’ forms fourth angles β1’, β2’, β3’, β4’ with the second straight segment LS2’. That is, the included angle between the center line of the first straight segment LS1’ corresponding to the first extension EP1’ and the center line of the second straight segment LS2’ is the fourth angle β1, the included angle between the center line of the first straight segment LS1’ corresponding to the second extension EP2’ and the center line of the second straight segment LS2’ is the second angle β2’, the included angle between the center line of the first straight segment LS1’ corresponding to the third extension EP3’ and the center line of the second straight segment LS2’ is the second angle β3’, and the included angle between the center line of the first straight segment LS1’ corresponding to the fourth extension EP4’ and the center line of the second straight segment LS2’ is the second angle β4’. For the first extension EP1’, the second extension EP2’, the third extension EP3’ and the fourth extension EP4’, the respective fourth angles β1’, β2’, β3’, β4’ are not equal to each other.

[0087] In some embodiments, the fourth angles β1’, β2’, β3’, β4’ are in the range of 135° to 180°. For example, the fourth angles β1’, β2’, β3’, β4’ are 135°, 140°, 145°, 150°, 155°, 160°, 165°, 170°, 175°, or 180°.

[0088] In some embodiments, the second angle β1 corresponding to the first extension EP1 is equal to the fourth angle β1' corresponding to the first extension EP1'; the second angle β2 corresponding to the second extension EP2 is equal to the fourth angle β2' corresponding to the second extension EP2'; the second angle β3 corresponding to the third extension EP3 is equal to the fourth angle β3' corresponding to the third extension EP3'; the second angle β4 corresponding to the fourth extension EP4 is equal to the fourth angle β4' corresponding to the fourth extension EP4'.

[0089] As Figure 6B shown, in some embodiments, the extending directions of the two first straight line segments LS1' corresponding to the first extension EP1' and the third extension EP3' are not parallel. The extending directions of the two first straight line segments LS1' corresponding to the second extension EP2' and the fourth extension EP4' are not parallel.

[0090] In the preparation Figure 3 and Figure 4A 、 Figure 4B the metal grid shown in, it is necessary to use Figure 5 and Figure 6A 、 Figure 6B the mask shown in. During the preparation process, first, a whole layer of metal film layer is formed on the substrate; then, photoresist is coated on the metal film layer; then, the photoresist is exposed by using Figure 5 and Figure 6A 、 Figure 6B the mask shown in, and then the exposed photoresist is developed to form a photoresist pattern; then, the exposed metal film layer is etched by using the photoresist pattern as a mask to form Figure 3 and Figure 4A 、 Figure 4B the metal grid shown in; finally, the photoresist pattern is stripped.

[0091] Due to the reasons of the lithography process, the shape of the intersection point O is not exactly the same as the shape of the node N; the shape of the first extension EP1 is not exactly the same as the shape of the first extension EP1'; the shape of the second extension EP2 is not exactly the same as the shape of the second extension EP2'; the shape of the third extension EP3 is not exactly the same as the shape of the third extension EP3'; the shape of the fourth extension EP4 is not exactly the same as the shape of the fourth extension EP4'.

[0092] According to the above preparation method, multiple first traces L1 of the metal grid correspond to multiple first traces L1' of the mask one by one, and the center lines of the corresponding first traces L1 and first traces L1' coincide with each other; multiple second traces L2 of the metal grid correspond to multiple second traces L2' of the mask one by one, and the center lines of the corresponding second traces L2 and second traces L2' coincide with each other; multiple intersections O of the metal grid correspond to multiple nodes N of the mask one by one, and the positions of the corresponding intersections O and nodes N overlap with each other.

[0093] The following describes Figure 5 and Figure 6A 、 Figure 6B the design method of the mask shown in.

[0094] Figure 7 FIG. is a plan view illustrating a design method of a mask according to some embodiments of the present disclosure. As Figure 7 shown, when setting the mask, first, multiple first virtual lines L1' parallel to each other corresponding to multiple first traces L1' and multiple second virtual lines L2' parallel to each other corresponding to multiple second traces L2' are selected. It should be noted that since multiple first traces L1 of the metal grid correspond to multiple first traces L1' of the mask one by one, and multiple second traces L2 of the metal grid correspond to multiple second traces L2' of the mask one by one, therefore, multiple first virtual lines L1' also correspond to multiple first traces L1 of the metal grid one by one, and multiple second virtual lines L2' also correspond to multiple second traces L2 of the metal grid one by one.

[0095] As Figure 7 shown, multiple first virtual lines L1' intersect with multiple second virtual lines L2' to form multiple virtual intersections O'. Any two adjacent first virtual lines L1' and any two adjacent second virtual lines L2' enclose a virtual grid, and all virtual grids are congruent rhombuses or squares.

[0096] As Figure 7 shown, the length of the common perpendicular line segment between two opposite sides of the virtual grid is S, and the angle of the vertex angle opposite to the common perpendicular line segment is A, where the value range of S is between 100 μm and 500 μm, and A is greater than or equal to 30° and less than 90°. For example, S is 100 μm, 200 μm, 300 μm, 400 μm, or 500 μm. For example, A is 30°, 40°, 50°, 60°, 70°, 80°, or 85°.

[0097] The criterion for selecting multiple first virtual lines L1' that are parallel to each other and multiple second virtual lines L2' that are parallel to each other is that, assuming that the first virtual line L1' and the second virtual line L2' are the first trace L1 and the second trace L2 of an actual metal grid, it is necessary to ensure that the moiré pattern generated when the metal grid is superimposed on the display panel is relatively slight. The slightness of the moiré pattern can be obtained through computer simulation calculations. For example, by adjusting the length S and the angle A of the above-mentioned common perpendicular line segment, the slightness of the moiré pattern can be adjusted.

[0098] Next, according to the position of the virtual intersection point O', the position of the node N of the mask can be designed, so as to be able to determine the position of the intersection point O of the metal grid. The principle for designing the position of the node N of the mask is that any node N is located within the selection region SR centered on the corresponding virtual intersection point O'. For example, based on the virtual intersection point O', randomly offset the position coordinates of the virtual intersection point O' within the selection region SR, so as to obtain the position coordinates of the node N, that is, obtain the position coordinates of the intersection point O. Therefore, multiple virtual intersection points O' correspond one by one to multiple intersection points O in the metal grid.

[0099] In some embodiments, the ratio of the area of the selection region SR to the area of the virtual grid is in the range of 0.01:1 to 0.08:1. For example, 0.01:1, 0.02:1, 0.03:1, 0.04:1, 0.05:1, 0.06:1, 0.07:1, or 0.08:1.

[0100] In Figure 7 In the shown embodiment, the selection region SR is a rectangle, and the length and width of the rectangle are respectively parallel to the two diagonals of the virtual grid. In some embodiments, the dimension of the rectangle along the first direction DR1 is 2K*S / (Sin(A / 2)), and the dimension of the rectangle along the second direction DR2 is 2K*S / (Cos(A / 2)), where the first direction DR1 is parallel to one diagonal of the virtual grid, the second direction DR1 is parallel to the other diagonal of the virtual grid, K is a constant, and its value range is [0.08, 0.2]. For example, the value of K is 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, or 0.2.

[0101] As Figure 7 shown, multiple virtual intersection points O' are arranged in an array. Therefore, multiple intersection points O in the metal grid are also arranged in an array. For example, in Figure 7Among them, the virtual intersection points O' in the same row are arranged along the first direction DR1, and the virtual intersection points O' in the same column are arranged along the second direction DR2. The virtual intersection points O' in the same row correspond to the intersection points O in the same row; the virtual intersection points O' in the same column correspond to the intersection points O in the same column. Since the nodes N of the mask are offset relative to the virtual intersection points O', the intersection points O in the same row are not collinear; and / or the intersection points O in the same column are not collinear.

[0102] Figure 8A is a plan view illustrating a mask design method according to some embodiments of the present disclosure. As Figure 8A shown, the selection region SR is circular, and the radius of the circle is K*S / (Sin(A / 2)) or K*S / (Cos(A / 2)), or 0.5*K*(S / Sin(A / 2)+S / Cos(A / 2)), where K is a constant, and its value range is [0.08, 0.2]. For example, the value of K is 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, or 0.2.

[0103] As Figure 8A shown, multiple virtual intersection points O' are formed in an array arrangement. Therefore, multiple intersection points O in the metal grid are also formed in an array arrangement. For example, in Figure 8A Among them, the virtual intersection points O' in the same row are arranged along the first direction DR1, and the virtual intersection points O' in the same column are arranged along the second direction DR2. The virtual intersection points O' in the same row correspond to the intersection points O in the same row; the virtual intersection points O' in the same column correspond to the intersection points O in the same column. Since the nodes N of the mask are offset relative to the virtual intersection points O', the intersection points O in the same row are not collinear; and / or the intersection points O in the same column are not collinear.

[0104] Figure 8B is a plan view illustrating a mask design method according to some embodiments of the present disclosure. As Figure 8B shown, the selection region SR is elliptical, and the major axis and minor axis of the ellipse are respectively parallel to two diagonals of the virtual grid. In Figure 8B the embodiment shown, the maximum dimension of the ellipse along the first direction DR1 is 2K*S / (Sin(A / 2)), and the maximum dimension of the ellipse along the second direction DR2 is 2K*S / (Cos(A / 2)), where the first direction DR1 is parallel to one diagonal of the virtual grid, the second direction DR2 is parallel to the other diagonal of the virtual grid, and K is a constant, and its value range is [0.08, 0.2]. For example, the value of K is 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, or 0.2.

[0105] AsFigure 8B As shown, a plurality of virtual intersection points O' are arranged in an array. Therefore, a plurality of intersection points O in the metal grid are also arranged in an array. For example, in Figure 8B , the virtual intersection points O' in the same row are arranged along the first direction DR1, and the virtual intersection points O' in the same column are arranged along the second direction DR2. The virtual intersection points O' in the same row correspond to the intersection points O in the same row; the virtual intersection points O' in the same column correspond to the intersection points O in the same column. Since the nodes N of the mask are offset relative to the virtual intersection points O', the intersection points O in the same row are not collinear; and / or, the intersection points O in the same column are not collinear.

[0106] According to the above design method, the ratio of the area of any grid finally obtained to the area of the virtual grid is in the range of 0.6:1 to 1.4:1, such as 0.6:1, 0.7:1, 0.8:1, 0.9:1, 1:1, 1.1:1, 1.2:1, 1.3:1, or 1.4:1.

[0107] When designing the mask, the above calculations can be performed for each node. However, the amount of data calculated in this way is very large, and the requirements for computing resources are relatively high.

[0108] Figure 9 is a plan view of a mask according to some embodiments of the present disclosure. To solve the problem of the amount of data, as Figure 9 shown, in some embodiments, the mask can be designed to include a plurality of minimum repeating units RU spliced together. In this case, it is necessary to ensure that the nodes N in the edge regions of each minimum repeating unit RU have the same offset relative to the corresponding virtual intersection points O', so that seamless splicing can be performed between any two adjacent minimum repeating units RU.

[0109] In this way, the final metal grid will be formed to include a plurality of minimum grid repeating units spliced together, and the intersection points O in the edge regions of each minimum grid repeating unit have the same offset relative to the corresponding virtual intersection points O'.

[0110] Figure 10A is a schematic diagram of a metal grid according to some embodiments of the present disclosure. As Figure 10AAs shown, in some embodiments, each intersection of the metal grid includes a main body portion MB, a first extension portion EP1, a second extension portion EP2, a third extension portion EP3, and a fourth extension portion EP4. Among them, the first extension portion EP1, the second extension portion EP2, the third extension portion EP3, and the fourth extension portion EP4 are arranged around the main body portion MB in sequence around the main body portion MB. The main body portion MB is approximately rectangular, and the long side and the short side of the approximate rectangle are concave inward towards the center of the approximate rectangle. In their respective extension directions away from the main body portion MB, the widths of the first extension portion EP1, the second extension portion EP2, the third extension portion EP3, and the fourth extension portion EP4 first decrease and then increase, so that the first extension portion EP1, the second extension portion EP2, the third extension portion EP3, and the fourth extension portion EP4 all have concave edges.

[0111] Figure 10B is for preparing Figure 10A a schematic diagram of a mask for the metal grid shown. As Figure 10B shown, in some embodiments, each node of the mask includes a main body portion MB', a first extension portion EP1', a second extension portion EP2', a third extension portion EP3', and a fourth extension portion EP4'. Among them, the first extension portion EP1', the second extension portion EP2', the third extension portion EP3', and the fourth extension portion EP4' are arranged around the main body portion MB' in sequence around the main body portion MB'. As Figure 10B shown, the main body portion MB', the first extension portion EP1', the second extension portion EP2', the third extension portion EP3', and the fourth extension portion EP4' are formed in an "H" shape.

[0112] Figure 11A is a schematic diagram of a metal grid according to some embodiments of the present disclosure. As Figure 11A shown, in some embodiments, each intersection of the metal grid includes a main body portion MB, a first extension portion EP1, a second extension portion EP2, a third extension portion EP3, and a fourth extension portion EP4. Among them, the first extension portion EP1, the second extension portion EP2, the third extension portion EP3, and the fourth extension portion EP4 are arranged around the main body portion MB in sequence around the main body portion MB. The main body portion MB is approximately square, and the sides of the approximate square are concave inward towards the center of the approximate square. The widths of the first extension portion EP1, the second extension portion EP2, the third extension portion EP3, and the fourth extension portion EP4 are substantially equal.

[0113] Figure 11B is for preparing Figure 11A a schematic diagram of a mask for the metal grid shown. As Figure 11BAs shown, in some embodiments, each node of the mask includes a main body portion MB’, a first extension portion EP1’, a second extension portion EP2’, a third extension portion EP3’ and a fourth extension portion EP4’. Among them, the first extension portion EP1’, the second extension portion EP2’, the third extension portion EP3’ and the fourth extension portion EP4’ are arranged around the main body portion MB’ in sequence around the main body portion MB’. As Figure 10B shown, a flat notch is formed between the first extension portion EP1’ and the second extension portion EP2’, and a flat notch is formed between the third extension portion EP3’ and the fourth extension portion EP4’.

[0114] Figure 12A is a schematic diagram of a metal grid according to some embodiments of the present disclosure. As Figure 12A shown, in some embodiments, each intersection of the metal grid includes a main body portion MB, a first extension portion EP1, a second extension portion EP2, a third extension portion EP3 and a fourth extension portion EP4. Among them, the first extension portion EP1, the second extension portion EP2, the third extension portion EP3 and the fourth extension portion EP4 are arranged around the main body portion MB in sequence around the main body portion MB. The main body portion MB is approximately rectangular, and the long side and the short side of the approximate rectangle are concave towards the center of the approximate rectangle. In their respective extension directions away from the main body portion MB, the widths of the first extension portion EP1, the second extension portion EP2, the third extension portion EP3 and the fourth extension portion EP4 first decrease and then increase, so that the first extension portion EP1, the second extension portion EP2, the third extension portion EP3 and the fourth extension portion EP4 have concave edges.

[0115] Figure 12B is for preparing Figure 12A shown mask of the metal grid. As Figure 12B shown, in some embodiments, each node of the mask includes a main body portion MB’, a first extension portion EP1’, a second extension portion EP2’, a third extension portion EP3’ and a fourth extension portion EP4’. Among them, the first extension portion EP1’, the second extension portion EP2’, the third extension portion EP3’ and the fourth extension portion EP4’ are arranged around the main body portion MB’ in sequence around the main body portion MB’. As Figure 10B shown, a triangular notch is formed between the first extension portion EP1’ and the second extension portion EP2’, and a triangular notch is formed between the third extension portion EP3’ and the fourth extension portion EP4’.

[0116] Figure 13A is a schematic diagram of a metal grid according to some embodiments of the present disclosure. As Figure 13AAs shown, in some embodiments, each intersection of the metal grid includes a main body portion MB, a first extension portion EP1, a second extension portion EP2, a third extension portion EP3, and a fourth extension portion EP4. Among them, the first extension portion EP1, the second extension portion EP2, the third extension portion EP3, and the fourth extension portion EP4 are arranged around the main body portion MB in sequence around the main body portion MB. The main body portion MB is quasi-square, and the sides of the quasi-square are concave inward towards the center of the quasi-square. In their respective extension directions away from the main body portion MB, the widths of the first extension portion EP1, the second extension portion EP2, the third extension portion EP3, and the fourth extension portion EP4 first decrease and then increase, such that the first extension portion EP1, the second extension portion EP2, the third extension portion EP3, and the fourth extension portion EP4 all have concave edges.

[0117] Figure 13B is for preparing Figure 13A a schematic diagram of a mask for the metal grid shown. As Figure 13B shown, in some embodiments, each node of the mask includes a main body portion MB', a first extension portion EP1', a second extension portion EP2', a third extension portion EP3', and a fourth extension portion EP4'. Among them, the first extension portion EP1', the second extension portion EP2', the third extension portion EP3', and the fourth extension portion EP4' are arranged around the main body portion MB' in sequence around the main body portion MB'. As Figure 10B shown, one side of the first extension portion EP1' close to the second extension portion EP2' is concave inward towards the side of the first extension portion EP1' away from the second extension portion EP2', forming a concave portion; one side of the second extension portion EP2' close to the third extension portion EP3' is concave inward towards the side of the second extension portion EP2' away from the third extension portion EP3', forming a concave portion; one side of the third extension portion EP3' close to the fourth extension portion EP4' is concave inward towards the side of the third extension portion EP3' away from the fourth extension portion EP4', forming a concave portion; one side of the fourth extension portion EP4' close to the first extension portion EP1' is concave inward towards the side of the fourth extension portion EP4' away from the first extension portion EP1', forming a concave portion.

[0118] Figure 14 is a schematic diagram showing a touch control substrate according to some embodiments of the present disclosure. As Figure 14 shown, in some embodiments, the touch control substrate includes at least one layer of the above-mentioned metal grid. Figure 14 Two layers of metal grids are shown in , where the dark grid and the light grid are located on different layers respectively. Taking the dark grid as an example, the included angle θ1 between the first trace L1 and the edge of the touch control substrate is greater than or equal to 20° and less than or equal to 80°, and the included angle θ2 between the second trace L2 and the edge of the touch control substrate is greater than or equal to 20° and less than or equal to 80°.

[0119] In some embodiments, for the same metal grid, the angles θ1 between different first traces L1 and the edge of the touch substrate are different from each other; and / or, the angles θ2 between different second traces L2 and the edge of the touch substrate are different from each other.

[0120] Figure 15 is a schematic diagram showing a touch display device according to some embodiments of the present disclosure. As Figure 15 shown, in some embodiments, the touch display device includes: a display panel; and the above-mentioned touch substrate, wherein the touch substrate is stacked on the display side of the display panel. The display panel includes a plurality of data lines DL parallel to each other and a plurality of gate lines GL parallel to each other.

[0121] As Figure 15 shown, the first trace L1 intersects with the data line DL in the display panel, and the angle φ1 between the first trace L1 and the data line DL is greater than or equal to 20° and less than or equal to 80°. The second trace L2 intersects with the data line DL, and the angle φ2 between the second trace L2 and the data line DL is greater than or equal to 20° and less than or equal to 80°.

[0122] As Figure 15 shown, the first trace L1 intersects with the gate line GL in the display panel, and the angle ψ1 between the first trace L1 and the gate line GL is greater than or equal to 20° and less than or equal to 80°. The second trace L2 intersects with the gate line GL, and the angle ψ2 between the second trace L2 and the gate line GL is greater than or equal to 20° and less than or equal to 80°.

[0123] The foregoing description of the embodiments of the present utility model has been presented for purposes of illustration and description. It is not exhaustive and is not intended to limit the present utility model to the precise forms or exemplary embodiments disclosed. Accordingly, the foregoing description should be regarded as illustrative rather than restrictive. Obviously, many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to explain the principles of the present utility model and its best mode of practical application, so that others skilled in the art can understand the various embodiments of the present utility model and the various modifications suitable for the particular use or implementation contemplated. The scope of the present utility model is intended to be defined by the appended claims and their equivalents, in which all terms are to be taken in their broadest reasonable sense unless otherwise specified. Thus, the term "the present utility model" does not necessarily limit the scope of the claims to a particular embodiment, and the reference to an exemplary embodiment of the present utility model does not imply a limitation of the present utility model and should not be inferred as such. The present utility model is defined only by the spirit and scope of the appended claims. In addition, these claims may refer to the use of "first", "second", etc., followed by a noun or element. These terms should be understood as nomenclature and should not be construed as limiting the number of elements modified by these nomenclatures, unless a specific number has been given. Any advantages and benefits described may not apply to all embodiments of the present utility model. It should be understood that those skilled in the art may make changes to the described embodiments without departing from the scope of the present utility model defined by the appended claims. Further, no element or component in this disclosure is intended to be dedicated to the public, whether or not the element or component is expressly recited in the appended claims.

Claims

1. A metal grid, comprising a plurality of first traces and a plurality of second traces that intersect each other, wherein, The intersections of the multiple first traces and the multiple second traces are arranged in an array. Any two adjacent first traces and any two adjacent second traces enclose a grid, and For any intersection, there is a first adjacent intersection adjacent to the intersection on the first trace where the intersection is located, and there is a second adjacent intersection adjacent to the intersection on the second trace where the intersection is located. The distance from the intersection to the first adjacent intersection is different from the distance from the intersection to the second adjacent intersection.

2. The metal grid according to claim 1, wherein The intersection includes: A main body portion; A first extension portion and a third extension portion, which are located on the first trace and extend away from the main body portion from two opposite corner portions of the main body portion; and A second extension portion and a fourth extension portion, which are located on the second trace and extend away from the main body portion from the other two opposite corner portions of the main body portion, Wherein, the first extension portion, the second extension portion, the third extension portion, and the fourth extension portion are arranged around the main body portion in sequence around the main body portion.

3. The metal grid according to claim 2, wherein The main body portion is a quasi-square, the sides of the quasi-square are concave inward towards the center of the quasi-square, the center lines of the first extension portion and the third extension portion coincide with each other, and the center lines of the second extension portion and the fourth extension portion coincide with each other.

4. The metal grid according to claim 3, wherein, The center lines of the first extension portion and the third extension portion are perpendicular to the center lines of the second extension portion and the fourth extension portion.

5. The metal grid according to claim 3, wherein, The first extension portion, the second extension portion, the third extension portion, and the fourth extension portion are respectively connected to connection lines, The connection line includes a first straight line segment and a second straight line segment connected together. The first extension portion, the second extension portion, the third extension portion, and the fourth extension portion are respectively connected to the corresponding second straight line segment. The first straight line segment is located on the side of the second straight line segment away from the intersection.

6. The metal grid according to claim 5, wherein The first extension portion, the second extension portion, the third extension portion, and the fourth extension portion respectively form a first angle with the corresponding second straight line segment, and each of the first angles is equal to each other, and the first angle is in the range of 135° to 180°.

7. The metal grid according to claim 6, wherein, The second straight line segment corresponding to the first extension portion is bent in a direction closer to the second extension portion with respect to the first extension portion; The second straight line segment corresponding to the second extension portion is bent in a direction closer to the first extension portion with respect to the second extension portion; The second straight line segment corresponding to the third extension portion is bent in a direction closer to the fourth extension portion with respect to the third extension portion; And The second straight line segment corresponding to the fourth extension portion is bent in a direction closer to the third extension portion with respect to the fourth extension portion.

8. The metal grid according to claim 6, wherein, The respective second straight line segments corresponding to the first extension portion, the second extension portion, the third extension portion, and the fourth extension portion have different lengths.

9. The metal grid according to claim 5, wherein, The first straight line segment and the second straight line segment form a second angle. For the same intersection point, for the first extension part, the second extension part, the third extension part, and the fourth extension part, the respective second angles are not equal to each other, and the second angle is in the range of 135° to 180°.

10. The metal mesh according to claim 3, wherein, The extending directions of the two first straight line segments corresponding to the first extension part and the third extension part are not parallel, and / or the extending directions of the two first straight line segments corresponding to the second extension part and the fourth extension part are not parallel.

11. The metal mesh according to claim 3, wherein, The first extension part, the second extension part, the third extension part, and the fourth extension part are congruent straight line segments.

12. The metal grid according to claim 3, wherein In their respective extending directions away from the main body part, the widths of the first extension part, the second extension part, the third extension part, and the fourth extension part first decrease and then increase, so that the first extension part, the second extension part, the third extension part, and the fourth extension part all have concave edges.

13. The metal grid according to claim 2, wherein, The main body part is a quasi-rectangle, and the long side and the short side of the quasi-rectangle are concave towards the center of the quasi-rectangle, and In their respective extending directions away from the main body part, the widths of the first extension part, the second extension part, the third extension part, and the fourth extension part first decrease and then increase, so that the first extension part, the second extension part, the third extension part, and the fourth extension part all have concave edges.

14. The metal mesh according to any one of claims 1 to 13, wherein, The intersection points in the same row are not collinear, and / or the intersection points in the same column are not collinear.

15. The metal mesh according to any one of claims 1 to 13, wherein The grid formed by any two adjacent first traces and any two adjacent second traces is a quadrilateral, and the quadrilateral includes four intersection points; On the same first trace, the straight-line distances between any two adjacent intersection points are all different; and / or On the same second trace, the straight-line distances between any two adjacent intersection points are all different.

16. The metal grid according to claim 1, wherein, The multiple first traces correspond to multiple mutually parallel first virtual lines, and the multiple second traces correspond to multiple mutually parallel second virtual lines, wherein the multiple first virtual lines and the multiple second virtual lines intersect each other to form multiple virtual intersection points, Any two adjacent first virtual lines and any two adjacent second virtual lines enclose a virtual grid, and all the virtual grids are congruent rhombuses or squares, The grid and the virtual grid are in one-to-one correspondence, and the intersection point and the virtual intersection point are in one-to-one correspondence, Any intersection point is located within a selection area centered on the corresponding virtual intersection point, and the ratio of the area of the selection area to the area of the virtual grid is in the range of 0.01:1 to 0.08:

1.

17. The metal mesh according to claim 16, wherein The length of the common perpendicular line segment between two opposite sides of the virtual grid is S, and the angle of the vertex angle opposite to the common perpendicular line segment is A, Wherein, the value range of S is between 100 μm and 500 μm, and A is greater than or equal to 30° and less than 90°.

18. The metal grid according to claim 17, wherein, The selection area is a rectangle, the length and width of the rectangle are respectively parallel to the two diagonals of the virtual grid, the dimension of the rectangle along the first direction is 2K*S / (Sin(A / 2)), and the dimension of the rectangle along the second direction is 2K*S / (Cos(A / 2)), Wherein, the first direction is parallel to a diagonal of the virtual grid, the second direction is parallel to the other diagonal of the virtual grid, K is a constant, and its value range is [0.08, 0.2].

19. The metal grid according to claim 18, wherein the selection area is circular, and the radius of the circle is K*S / (Sin(A / 2)) or K*S / (Cos(A / 2)), or 0.5*K*(S / Sin(A / 2)+S / Cos(A / 2)), Among them, K is a constant, and its value range is [0.08, 0.2], or the selection area is elliptical, the major axis and the minor axis of the ellipse are respectively parallel to the two diagonals of the virtual grid, the maximum dimension of the ellipse in the first direction is 2K*S / (Sin(A / 2)), and the maximum dimension of the ellipse in the second direction is 2K*S / (Cos(A / 2)), Wherein, the first direction is parallel to a diagonal of the virtual grid, the second direction is parallel to the other diagonal of the virtual grid, K is a constant, and its value range is [0.08, 0.2].

20. The metal grid according to claim 16, comprising a plurality of minimum grid repeating units spliced together, and the intersections in the edge regions of each minimum grid repeating unit have the same offset relative to the corresponding virtual intersections.

21. The metal grid according to claim 16, wherein, The ratio of the area of any grid to the area of the virtual grid is in the range of 0.6:1 to 1.4:

1.

22. A touch control substrate, comprising at least one layer of the metal grid according to any one of claims 1 to 21.

23. The touch control substrate according to claim 22, wherein, The included angle between the first trace and the edge of the touch control substrate is greater than or equal to 20° and less than or equal to 80°, and the included angle between the second trace and the edge of the touch control substrate is greater than or equal to 20° and less than or equal to 80°.

24. A touch display device, comprising: a display panel; and the touch control substrate according to claim 22, wherein, the touch control substrate is stacked on the display side of the display panel.

25. The touch display device according to claim 24, wherein, The first trace intersects with the data line or the gate line in the display panel, the included angle between the first trace and the data line or the gate line is greater than or equal to 20° and less than or equal to 80°, the second trace intersects with the data line or the gate line, and the included angle between the second trace and the data line or the gate line is greater than or equal to 20° and less than or equal to 80°.

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