Touch substrate and touch display panel

Abstract

This disclosure provides a touch substrate and a touch display panel. The touch substrate includes a substrate, including a first surface and a second surface facing each other; a first metal mesh layer disposed on the first surface of the substrate, the first metal mesh layer including a plurality of first metal mesh strips, the plurality of first metal mesh strips being arranged sequentially along a first direction, adjacent two first metal mesh strips being independent of each other, and the first metal mesh strips extending along a second direction orthogonal to the first direction and including a plurality of metal mesh lines, the plurality of metal mesh lines being arranged in a mesh pattern, and including a plurality of main portions extending along the second direction and a plurality of branch portions connected to the plurality of main portions and extending from the main portions along a direction at a predetermined angle to the second direction. The first metal mesh strip has at least one opening in the second direction for each of the main trunks of multiple metal mesh lines; and a second metal mesh layer disposed on the second surface of the substrate, the second metal mesh layer comprising multiple metal connection structures, each metal connection structure comprising a first end, a second end, and a metal connection line between the first end and the second end; wherein the orthographic projection of the metal connection line on the substrate at least partially overlaps with the orthographic projection of a corresponding opening in the at least one opening on the substrate, and the first end and the second end are electrically connected to the corresponding metal mesh line in the first metal mesh strip through a via disposed in the substrate.

Description

Technical Field

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

[0002] With the rapid development of Active Matrix Organic Light Emitting Diode (AMOLED), touch display devices have entered the era of full-screen displays and narrow bezels. To provide users with a better experience, full-screen displays, narrow bezels, high resolution, rollable designs, and foldable designs will inevitably become important development directions for AMOLED in the future. Summary of the Invention

[0003] This disclosure provides a touch substrate and a touch display panel.

[0004] The touch substrate includes: a substrate, including a first surface and a second surface facing each other; a first metal mesh layer disposed on the first surface of the substrate, the first metal mesh layer including a plurality of first metal mesh strips, the plurality of first metal mesh strips being arranged sequentially along a first direction, adjacent two first metal mesh strips being independent of each other, and the first metal mesh strips extending along a second direction orthogonal to the first direction and including a plurality of metal mesh lines, the plurality of metal mesh lines being arranged in a mesh pattern, and including a plurality of main sections extending along the second direction and a plurality of branch sections respectively connected to the plurality of main sections and extending from the main sections along a direction at a predetermined angle to the second direction. The first metal mesh strip has at least one opening in the second direction for each of the main trunks of multiple metal mesh lines; and a second metal mesh layer disposed on the second surface of the substrate, the second metal mesh layer comprising multiple metal connection structures, each metal connection structure comprising a first end, a second end, and a metal connection line between the first end and the second end; wherein the orthographic projection of the metal connection line on the substrate at least partially overlaps with the orthographic projection of a corresponding opening in the at least one opening on the substrate, and the first end and the second end are electrically connected to the corresponding metal mesh line in the first metal mesh strip through a via disposed in the substrate.

[0005] In one embodiment, at least one end of the at least one opening in the plurality of metal mesh lines includes two adjacent disconnected branch portions, and one end of the first end and the second end in the metal connection structure connects the two adjacent disconnected branch portions together through a through hole provided in the substrate.

[0006] In one embodiment, the metal connection line of the metal connection structure extends along the second direction.

[0007] In one embodiment, a redundant metal wire is further provided on the first surface at a position corresponding to the connection line of the at least one metal connection structure, and the redundant metal wire is floating and is of the same layer and material as the first metal mesh strip.

[0008] In one embodiment, the second metal mesh layer further includes a plurality of second metal strips extending along a second direction; and the plurality of second metal strips are arranged sequentially along a first direction.

[0009] In one embodiment, the orthographic projection of two adjacent second metal strips on the substrate overlaps with the outer contour of the orthographic projection of the corresponding metal mesh strip on the substrate.

[0010] In one embodiment, the metal mesh structure further includes a first end connecting line connected to a first end and a second end connecting line connected to a second end; the first end connecting line is connected to a second metal strip, and the intersection of the two is a first connection point on the second metal strip; the second end connecting line is connected to an adjacent second metal strip, and the intersection of the two is a second connection point on the second metal strip; and the second metal strip further includes a first notch on one side of the first connection point and a second notch on the same side of the second connection point.

[0011] In one embodiment, the orthographic projections of multiple branches of the metal mesh lines of the first metal mesh layer onto the substrate at least partially overlap with the orthographic projections of the first end connection line and the second end connection line onto the substrate.

[0012] In one embodiment, the sum of the orthographic projections of the plurality of first metal mesh strips and the plurality of second metal strips onto the substrate includes a plurality of first metal mesh sub-strips, a plurality of second metal mesh sub-strips, and a plurality of third metal mesh sub-strips, thereby constituting a plurality of repeating units. Each repeating unit includes one first metal mesh sub-strip, one second metal mesh sub-strip, and one third metal mesh sub-strip. The plurality of repeating units are arranged sequentially along a first direction. Each repeating unit includes a plurality of repeating sub-units arranged along a second direction. Each repeating sub-unit includes a four-row, three-column structure consisting of four first blocks, four second blocks, and four third blocks. The first row includes the first blocks, second blocks, and third blocks arranged sequentially along the first direction. Each of the second and fourth rows includes a second block, a third block, and a first block arranged sequentially along a first direction; the third row includes a third block, a first block, and a second block arranged sequentially along the first direction; the first block includes a first sub-block and a second sub-block that are in contact with each other arranged along the first direction; the second block includes a third sub-block and a first sub-block that are in contact with each other arranged along the first direction; and the third block includes a second sub-block and a third sub-block that are in contact with each other arranged along the first direction; and the contact positions of the first sub-blocks and second sub-blocks in each of the first blocks in the first to third rows overlap with the orthographic projection of a corresponding metal connection structure among the plurality of metal connection structures onto the substrate.

[0013] In one embodiment, the orthographic projection of the plurality of metal connection structures onto the substrate falls within the structures of the first, second, and third rows.

[0014] In one embodiment, the first sub-block, the second sub-block, and the third sub-block are all hexagons extending along a second direction; the length of the first sub-block along the second direction is greater than the lengths of the second sub-block and the second sub-block along the second direction; and the arrangement of the first blocks and the second blocks in adjacent rows in the first direction is staggered by a predetermined distance such that the third sub-block in the second block is located between the first sub-block and the second sub-block in the first block, the arrangement of the second blocks and the third blocks in adjacent rows in the first direction is staggered by a predetermined distance such that the second sub-block in the second block is located between the third sub-block and the first sub-block in the third block, and the arrangement of the first blocks and the third blocks in adjacent rows in the first direction is staggered by a predetermined distance such that the second sub-block in the third block is located between the first sub-block and the second sub-block in the first block.

[0015] In one embodiment, the sum of the orthographic projections of the plurality of first metal mesh strips and the plurality of second metal strips onto the substrate includes a plurality of first metal mesh sub-strips, a plurality of second metal mesh sub-strips, and a plurality of third metal mesh sub-strips, thereby constituting a plurality of repeating units. Each repeating unit includes one first metal mesh sub-strip, one second metal mesh sub-strip, and one third metal mesh sub-strip. The plurality of repeating units are arranged sequentially along a first direction. Each repeating unit includes a plurality of repeating sub-units arranged along a second direction. Each repeating sub-unit includes a three-row, three-column structure consisting of three first blocks, three second blocks, and three third blocks. The first row includes the first blocks, second blocks, and third blocks arranged sequentially along the first direction. The three blocks are arranged in three rows: the second row includes a second block, a third block, and a first block arranged sequentially along a first direction; the third row includes a third block, a first block, and a second block arranged sequentially along a first direction; the first block includes a first sub-block and a second sub-block that are in contact with each other arranged along a first direction; the second block includes a third sub-block and a first sub-block that are in contact with each other arranged along a first direction; and the third block includes a second sub-block and a third sub-block that are in contact with each other arranged along a first direction; and the contact positions of the first sub-blocks and second sub-blocks in each of the first blocks in the first to third rows overlap with the orthographic projection of a corresponding metal connection structure among the plurality of metal connection structures onto the substrate.

[0016] In one embodiment, the first sub-block, the second sub-block, and the third sub-block are all rectangles extending along a second direction; the length of the first sub-block along the second direction is greater than the lengths of the second sub-block and the third sub-block along the second direction; and the first and second blocks of adjacent rows are aligned in a first direction, the second and third blocks of adjacent rows are aligned in a first direction, and the first and third blocks of adjacent rows are aligned in a first direction.

[0017] In one embodiment, each second metal strip includes a plurality of alternating first connection points and a plurality of second connection points, and an opening is provided between adjacent first connection points and second connection points.

[0018] In one embodiment, the first metal mesh strip at the location of the first sub-block includes an additional metal line that contacts and connects with one of the plurality of metal mesh lines extending in a second direction, and the additional metal line extends in a first direction.

[0019] This disclosure also provides a touch display panel, including a display substrate and the aforementioned touch substrate.

[0020] In one embodiment, the display substrate includes a plurality of pixel units, each pixel unit including a first sub-pixel, a second sub-pixel and a third sub-pixel, wherein the orthographic projection of the first sub-block on the substrate surrounds the orthographic projection of the first sub-pixel on the substrate, the orthographic projection of the second sub-block on the substrate surrounds the orthographic projection of the second sub-pixel on the substrate, and the orthographic projection of the third sub-block on the substrate surrounds the orthographic projection of the third sub-pixel on the substrate.

[0021] In one embodiment, the first metal mesh strip at the location of the first sub-block includes an additional metal line that contacts and connects with one of the plurality of metal mesh lines extending in a second direction, and the additional metal line extends in a first direction and divides the first sub-block into a first portion and a second portion; the display substrate includes a plurality of pixel units, each pixel unit including two first sub-pixels, one second sub-pixel, and one third sub-pixel; and the orthographic projection of the first portion on the substrate surrounds the orthographic projection of one of the two first sub-pixels on the substrate, the orthographic projection of the second portion on the substrate surrounds the orthographic projection of the other of the two first sub-pixels on the substrate, the orthographic projection of the second sub-block on the substrate surrounds the orthographic projection of the second sub-pixel on the substrate, and the orthographic projection of the third sub-block on the substrate surrounds the orthographic projection of the third sub-pixel on the substrate.

[0022] In one embodiment, the first sub-pixel includes a green sub-pixel, the second sub-pixel includes a red sub-pixel, and the third sub-pixel includes a blue sub-pixel. Attached Figure Description

[0023] To more clearly illustrate the embodiments of this disclosure, the accompanying drawings of various embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are merely some embodiments of this disclosure, but this disclosure is not limited thereto:

[0024] Figure 1A A top view schematic diagram of a touch substrate according to an embodiment of the present disclosure is shown;

[0025] Figure 1B A wiring diagram of a repeating unit consisting of a first metal mesh layer and a second metal mesh layer respectively disposed on a first surface and a second surface of a substrate is shown in an embodiment of the present disclosure.

[0026] Figure 2 An embodiment according to this disclosure is shown. Figure 1A The diagram shows a cross-sectional view of the touch substrate taken along line AA'.

[0027] Figure 3 An embodiment according to this disclosure is shown. Figure 1AThe cross-sectional view of the touch substrate taken along line BB' is shown;

[0028] Figure 4 An embodiment according to this disclosure is shown. Figure 1A The cross-sectional view of the touch substrate taken along line CC' is shown.

[0029] Figure 5 An embodiment according to this disclosure is shown. Figure 1A The cross-sectional view of the touch substrate taken along line DD' is shown;

[0030] Figure 6 A top view schematic diagram of a touch substrate according to an embodiment of the present disclosure is shown;

[0031] Figure 7 An embodiment according to this disclosure is shown. Figure 6 The cross-sectional view of the touch substrate taken along line aa' is shown;

[0032] Figure 8 An embodiment according to this disclosure is shown. Figure 6 The cross-sectional view of the touch substrate taken along line bb' is shown;

[0033] Figure 9 An embodiment according to this disclosure is shown. Figure 6 The cross-sectional view of the touch substrate taken along line cc' is shown;

[0034] Figure 10A and Figure 10B A schematic diagram showing the layout of a sub-pixel array in a pixel unit of a display substrate in a touch display panel according to an embodiment of the present disclosure is provided.

[0035] Figure 10C A top view schematic diagram of a touch substrate according to an embodiment of the present disclosure is shown;

[0036] Figure 10D A top view schematic diagram of a touch display panel according to an embodiment of the present disclosure is shown; and

[0037] Figures 11A to 11B Schematic diagrams are shown of a touch substrate cut into multiple touch blocks according to embodiments of the present disclosure. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solutions of this disclosure, the disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising,” “including,” or “including,” and similar terms mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. The terms “connected,” “linked,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes. Furthermore, “same layer” in embodiments of this disclosure may refer to membrane layers on the same structural layer. Alternatively, for example, layers within the same layer can be formed using the same deposition process to create a specific pattern, and then patterned using the same photomask through a single patterning process to create a layer structure. Depending on the specific pattern, the single patterning process may include multiple exposure, development, or etching processes, and the specific pattern in the resulting layer structure can be continuous or discontinuous. These specific patterns may also be at different heights or have different thicknesses.

[0040] Self-capable FMLOC (flexible multi-layer on cell) has gradually become the mainstream in the mid-to-high-end AMOLED mobile phone screen market due to its advantages such as thinner structure, narrower bezels, and better optical display effect. However, some self-capable FMLOCs include at least a first touch metal layer and a second touch metal layer, and the positions of the two layers are usually different. For example, the second touch metal layer is closer to the surface of the touch display panel than the first touch metal layer. This will result in different reflection intensities when bonded to the display substrate (e.g., OLED display substrate). In addition, multiple touch blocks (i.e., multiple touch units) of the touch substrate need to be separated by breaking the metal lines in the second touch metal layer corresponding to the positions between the touch blocks to form multiple independent touch blocks. The broken metal lines in the second touch metal layer near the surface of the touch substrate will cause more obvious visibility mura.

[0041] To address this problem, this disclosure provides a touch substrate comprising a substrate having opposing first and second surfaces; a first metal mesh layer disposed on the first surface of the substrate, the first metal mesh layer comprising a plurality of first metal mesh strips arranged sequentially along a first direction and independent of each other; and each of the plurality of first metal mesh strips extending along a second direction orthogonal to the first direction and comprising a plurality of metal mesh lines arranged in a mesh pattern, the plurality of metal mesh lines comprising a plurality of main sections extending along the second direction and a plurality of branch sections connected to the plurality of main sections and extending from the main sections along a direction at a certain angle to the second direction; the plurality of metal mesh lines of the first metal mesh strips having at least one opening in the second direction, such that the first metal mesh strips cover the second direction. The system includes at least one opening; and a second metal mesh layer disposed on a second surface of a substrate, the second metal mesh layer including a plurality of metal connection structures, each of the plurality of metal connection structures including a first end, a second end, and a metal connection line between the first end and the second end; wherein the orthographic projection of the metal connection line between the first end and the second end of each of the plurality of metal connection structures on the substrate at least partially overlaps with the orthographic projection on the substrate of at least one opening in the main trunk portion of a corresponding metal mesh line of a first metal mesh strip, and each of the first end and the second end of the metal connection structure is electrically connected to the corresponding metal mesh line in the first metal mesh strip through a via disposed in the substrate, so as to connect the metal mesh lines at both ends of at least one opening in the plurality of metal mesh lines together. That is, in this disclosure, the metal connection structures disposed on the second surface of the substrate connect the disconnected main trunk portions of the first metal mesh strips extending in a second direction on the first surface together, thereby making the metal mesh lines in the metal mesh strips extending in the second direction connected.

[0042] Furthermore, at least one end of the at least one opening in the plurality of metal mesh lines includes two adjacent broken branch portions, and one end of the first end and the second end of the metal connection structure connects these two adjacent broken branch portions together through a through hole provided in the substrate. That is, in this disclosure, the metal connection structure provided on the second surface of the substrate connects the broken branch portions extending at a certain angle to the second direction in the first metal mesh strip on the first surface, thereby making all the metal mesh lines in the entire metal mesh strip interconnected, which can further increase the number of metal mesh lines used to form the touch block, increase the RC load, and thus increase the touch sensing sensitivity.

[0043] In the touch substrate disclosed herein, the metal mesh forming the touch blocks includes a first metal mesh layer and a second metal mesh layer on a first surface and a second surface of the substrate. The first wiring in the first metal mesh layer and the second wiring in the second metal mesh layer are combined to form a metal mesh that is interconnected with each other, which makes it easy to divide the metal mesh according to actual needs to form multiple touch blocks as required.

[0044] Specifically, in one embodiment, such as Figures 1A to 5 As shown, the touch substrate of this disclosure includes a substrate 1, and a first metal mesh layer TM2 and a second metal mesh layer TM1 respectively disposed on a first surface 200 and a second surface 300 opposite to each other on the substrate 1. Figure 1A and Figure 1B As shown, the first metal mesh layer TM2 formed on the first surface 200 includes multiple metal mesh lines 13 and multiple additional metal lines 110, which are shown in a narrow line width manner. Some of the multiple metal mesh lines 13 are interconnected so that the multiple metal mesh lines 13 are arranged in a mesh shape as a whole. The multiple additional metal lines 110 extend along the first direction X and are electrically connected to the multiple metal mesh lines 13, and together with the multiple metal mesh lines 13, they constitute part of a touch unit for detecting touch. However, this disclosure is not limited thereto. The first metal mesh layer TM2 may only include multiple metal mesh lines 13, without the additional metal lines 110, depending on the sub-pixel array layout in the corresponding display substrate. The second metal mesh layer formed on the second surface 300 includes multiple second metal strips 12 shown in a wide line width and multiple metal connection structures 600. The multiple second metal strips 12 extend along a second direction Y orthogonal to the first direction X and can be arranged sequentially along the first direction X, for example, they can be arranged uniformly with approximately equal spacing. The metal connection structure 600 includes a first end 60, a second end 90 and a connecting line 80 between them. Figure 1A and Figure 1B The metal connection structure 600 shown is disposed in the second metal mesh layer TM1, and its connection line 80 can extend along the second direction Y.

[0045] like Figure 1A As shown, a first metal mesh layer TM2 and a second metal mesh layer TM1 formed on different surfaces of the substrate are illustrated by thin and thick lines, respectively. That is, in this disclosure, the first metal mesh layer TM2 and the second metal mesh layer TM1 are arranged in different layers. Figure 1AThe reason for showing the method is merely for differentiation and does not represent the actual linewidth of the first metal mesh layer TM2 and the second metal mesh layer TM1. For example, in this application, the width of the metal lines in the first metal mesh layer TM2 and the second metal mesh layer TM1 can range from 2 μm to 10 μm, for example, from 3 μm to 5 μm.

[0046] Figure 2 It shows Figure 1A A cross-sectional view of the touch substrate along line AA'. Figure 2 In the diagram, the additional metallic line 110 is schematically drawn in a thicker form to clearly show the wiring of the touch grid line at position A, which is intercepted by the AA' line. Figure 2 It can be seen that metal mesh lines 13 and additional metal lines 110 are formed on the first surface 200 of the substrate 1, which are in contact with each other; that is, the additional metal lines 110 are part of the metal mesh lines on the first surface 200. A connecting line 80 between the second metal strip 12 and the first end 60 and the second end 90 of the metal connection structure 600 is formed on the second surface 300 of the substrate 1. Figure 2 It can be seen that near the edge of the additional metal line 110 close to the second metal strip 12, the metal mesh line 13 of the first metal mesh layer TM2 is not provided on the first surface 200, but the second metal strip 12 is provided on the second surface 300; the orthographic projection of the additional metal line 110 on the substrate 1 is adjacent to the orthographic projection of the second metal strip 12 on the substrate 1, therefore in Figure 1A and Figure 1B As shown in the composite diagram of the orthographic projections of the first metal mesh layer TM2 and the second metal mesh layer TM1 onto the substrate 1, it can be seen that at line AA', the additional metal line 110 and the second metal strip 12 are adjacent. However, this disclosure is not limited to this; the orthographic projections of the additional metal line on the first surface 200 and the second metal strip 12 on the second surface 300 onto the substrate 1 may not be adjacent, but may be spaced apart. In this disclosure, Figure 1A In the composite image of the first metal mesh layer TM2 and the second metal mesh layer TM1 projected onto the substrate 1, the metal mesh line 13 defined between the two second metal strips 12 can be considered as a "first metal mesh strip disposed on the first surface 200 of the substrate" in this application. Therefore, multiple first metal mesh strips are disposed on the entire first surface 200 of the substrate 1. These first metal mesh strips are independent of each other, and the gap between the orthogonal projections of every two adjacent first metal mesh strips onto the substrate 1 is filled by the second metal strips 12 at corresponding positions on the second surface 300. Additionally, as... Figure 2As shown, no metal mesh line 13 is provided on the first surface 200 at the location of the connecting line 80 corresponding to the metal connection structure 600. That is, at the location of the connecting line 80, the metal mesh line 13 is broken on the first surface 200.

[0047] Specifically, such as Figure 1B The subgraph of a shows Figure 1A A wiring diagram of a first metal mesh strip. The metal mesh lines 13 in a first metal mesh strip on a first surface 200 may include multiple main sections 130 and multiple branch sections 131; the multiple main sections 130 extend along a second direction, and the multiple branch sections 131 include multiple branch sections 131 extending from the multiple main sections 130 along a direction at a certain angle to the second direction; the multiple metal mesh lines 13 of the first metal mesh strip are provided with at least one opening unit 6000 in the second direction, such that the first metal mesh strip includes at least one longitudinal opening in the second direction, thus forming a first metal mesh strip that is discontinuous in the second direction, such as... Figure 1B An open element 6000 of G in subgraph a is shown. Figure 1B The b-subgraph shows Figure 1A and Figure 1B The diagram shows a wiring pattern on the second surface 300. The portion shown in sub-figure b corresponds to a first metal mesh strip shown in sub-figure a. This portion includes two second metal strips 12 and a metal connection structure 600 located between these two second metal strips 12. The metal connection structure 600 includes a first end 60, a second end 90, and a metal connecting line 80 between them. The metal connection structure 600 also includes a first end connecting line 601 connecting the first end 60 to its adjacent second metal strip 12 and a second end connecting line 901 connecting the second end 90 to its adjacent second metal strip 12. Additionally, an opening 500 is provided on the second metal strip 12, such as... Figure 1B As shown in H in sub-figure b, the second metal strip 12 includes at least one opening, that is, the second metal strip 12 includes multiple metal segments extending along the second direction, while multiple adjacent metal segments in the first direction X are connected together by a metal connection structure 600 to form a metal mesh on the second surface 300. Figure 1B The sub-figure shows the combination of the orthographic projections of the wiring on the first surface 200 and the wiring on the second surface 300 onto the substrate 1. Additionally, as shown in the diagram... Figure 1BAs shown in sub-figure 1a, the plurality of branch portions 131 of the metal mesh lines of a first metal mesh strip also include at least one broken branch portion, which is separated from the other branch portions and is independent. For example, the endpoints 1301 and 1302 in sub-figure 1a are broken, indicating that two adjacent branch portions 131 are broken rather than connected. Similarly, the endpoints 1303 and 1304 in sub-figure 1a are broken, again indicating that two adjacent branch portions 131 are broken rather than connected. Based on sub-figure 1a, it can be seen that the metal mesh lines in each first metal mesh strip formed on the first surface 200 are not completely connected, and there are openings in at least one main portion 130 extending along the second direction Y.

[0048] Figure 3 It shows Figure 1A The image shows a cross-sectional view of the touch substrate taken at position B along line BB'. Figure 3 It can be seen that metal mesh lines 13 are formed on the first surface 200 of the substrate 1. Figure 3 It can be seen that the metal mesh line 13 on the first surface 200 is broken at position B; a metal connection structure 600 is formed on the second surface 300 of the substrate 1, and its second end 90 electrically connects the metal mesh line 13 that is broken at this point on the first surface 200 through a through-hole passing through the substrate 1 and the metal material in the through-hole. Figure 3 The width of the second end 90 of the metal connection structure 600 can be 5 μm to 7 μm.

[0049] Figure 4 It shows Figure 1A A cross-sectional view of the touch substrate taken at position C along line CC'. Figure 4 It can be seen that a metal grid line 13 and an additional metal line 110 are formed on the first surface 200 of the substrate 1; and a second metal strip 12 is formed on the second surface 300 of the substrate 1. Figure 4 and Figure 2 The only difference is that a portion of the connecting line 80 at position C is removed, thus forming a shape like... Figure 1A The opening shown is 50. Figure 4 The connecting line 80 at position C shown is broken.

[0050] As described above, the first end 60 and the second end 90 of the metal connection structure 600 in the second metal mesh layer TM1 can be connected to the metal mesh line 13 of the first metal mesh layer TM2 through the via through the substrate 1. This allows the metal mesh line 13 that is broken at the first end 60 and the second end 90 in the first metal mesh strip to be electrically connected together. Therefore, the metal mesh line 13 in the first metal mesh strip on the first surface 200 is electrically connected together by the metal connection structure 600 formed on the second surface 300, thereby forming a mesh-like metal line on the two surfaces of the substrate 1 as part of the touch unit.

[0051] Depend on Figure 1A and Figure 1B As can be seen, on the second surface 300 of the substrate 1, the connecting line 80 of each metal connection structure 600 is configured to extend along the second direction Y and be located between two adjacent second metal strips 12. Each metal connection structure 600 on the second surface 300 also includes a first end connecting line 601 electrically connected to the first end 60 and a second end connecting line 901 electrically connected to the second end 90. The first end connecting line 601 is connected to a neighboring second metal strip 12 at a first connection point a1, and the second end connecting line 901 is connected to a neighboring second metal strip 12 at a second connection point a2. Through the first end connecting line 601 and the second end connecting line 901, multiple second metal strips 12 on the second surface 300 can be connected in the first direction X. That is, the first end connecting line 601 and the second end connecting line 901, as connecting lines in the first direction X, connect multiple second metal strips 12 extending approximately along the second direction Y, thereby forming a second metal mesh layer TM1 on the second surface 300. In other words, on the second surface 300, the second metal mesh layer TM1 not only includes a plurality of second metal strips 12 extending generally along the second direction Y and a plurality of metal connection structures 600 extending generally along the second direction Y, but also includes a first end connection line 601 and a second end connection line 901 extending generally along the first direction X for each metal connection structure 600.

[0052] Furthermore, Figure 5 It shows Figure 1A A cross-sectional view of the touch substrate at position D. (From...) Figure 5 It can be seen that at position D, a metal mesh line 13 is formed on the first surface 200 of the substrate 1; at the second end 90, the broken metal mesh lines 13 on the first surface 200 are connected together by metal material in the through-holes provided in the substrate 1; at the first end 60, the broken metal mesh lines 13 on the first surface 200 are also connected together by metal material in the through-holes provided in the substrate 1; Figure 1A and Figure 5 As shown, on the first surface 200, the metal mesh line 13 between the two first metal mesh strips is broken, and the orthographic projection of the broken position of the metal mesh line 13 on the first substrate 1 overlaps with the orthographic projection of the second metal strip 12 on the first substrate 1; the first end connecting line 601 connected to the first end 60 on the second surface 300 is connected to the second metal strip 12, and the second end connecting line 901 connected to the second end 90 is connected to the second metal strip 12.

[0053] Depend on Figure 1A and Figure 5 As shown, a notch 500 is provided on a second metal strip 12 extending approximately along the second direction Y on the second surface 300. At the notch 500, the second metal strip 12 is broken.

[0054] like Figure 1A and Figure 1B As shown, the metal mesh lines on the touch substrate of this disclosure for implementing touch units are composed of a first metal mesh layer TM2 and a second metal mesh layer TM1 respectively disposed on two opposing first surfaces 200 and second surfaces 300 of the substrate 1. The metal mesh lines included in these two layers are electrically connected through vias disposed in the substrate 1, thereby constituting a touch unit that can be used to implement a self-contained touch display substrate. In the above description... Figure 5 In the description, a plurality of second metal strips 12 formed on the second surface 300 extend generally along the second direction Y. A plurality of notches 500 are provided on each second metal strip 12, which divide each second metal strip 12 into a plurality of metal segments. These metal segments are connected to each other by a metal connection structure 600, a first end connection line 601 and a second end connection line 901 provided on the second surface 300. They are then electrically connected to a first metal mesh formed on the first surface 200 through the first end 60 and the second end 90, thereby forming a metal mesh structure on the orthographic projection of the substrate 1, which is used to form a plurality of touch units of the present disclosure.

[0055] in addition, Figure 1A and Figure 1B The image also shows opening 50. (By...) Figure 1AIt can be seen that not all connecting lines 80 of the metal connection structure 600 include openings 50. In this disclosure, openings 50 are only provided when the metal mesh structure described above is divided to separate the entire metal mesh structure formed on the first surface 200 and the second surface 300 to form multiple touch blocks. The connecting lines 80 of the metal connection structure 600 are cut at specific locations as needed to divide the metal wires of the mesh structure into multiple touch blocks. In this disclosure, in order to divide the metal wires of the entire mesh structure into multiple touch blocks, it is only necessary to cut the connecting lines 80 of the metal connection structure 600 in the area to be divided. These openings 50, together with the notches 500 provided on the second metal strip 12 as described above and the arrangement of the first metal mesh layer TM2 and the first metal mesh layer TM1 on the first surface 200 as described above, divide the entire mesh-like metal wires into multiple touch blocks. Therefore, the division of touch blocks can be easily achieved. In addition, since the dividing position is set on the second surface 300, in this touch substrate, the opening 50 at the boundary between the two touch blocks is located on the second metal mesh layer TM1, and the notch 500 on the second metal strip 12 is also located on the second metal mesh layer TM1. A substrate 1 (such as a SiNx film) is provided between it and the first metal mesh layer TM2. Therefore, after the external light is refracted by multiple film layers, the reflectivity of the metal in the second metal mesh layer TM1 is reduced, thereby eliminating the visibility murmur caused by the notch at the boundary.

[0056] like Figure 1A As shown, in one embodiment, the orthographic projections of two adjacent second metal strips 12 on the substrate 1 overlap with the outer contour of the orthographic projection of a corresponding first metal mesh strip on the substrate. That is, the orthographic projections of two adjacent second metal strips 12 on the substrate can be regarded as the outer contour or edge of the orthographic projection of a corresponding first metal mesh strip on the substrate, and the orthographic projection of the corresponding first metal mesh strip is surrounded within it.

[0057] Additionally, it should be noted that, besides the first end connecting line 601 and the second end connecting line 901 (corresponding to the metal mesh lines 6011 and 9011 formed on the first surface 200, such as...), Figure 1B Except for G shown in the diagram, the metal lines included in the first metal mesh layer TM2 formed on the first surface 200 and the metal lines included in the second metal mesh layer TM1 formed on the second surface 300 do not overlap on the substrate 1 in their orthogonal projections. In other words, in order to form multiple independent touch blocks as needed to achieve self-capacitive touch detection, the metal lines set on the two opposite surfaces of the same substrate can be regarded as having complementary orthogonal projections on the substrate 1, thereby jointly forming the metal mesh lines of the touch blocks.

[0058] Specifically, such as Figure 1A The sum of the orthographic projections of the multiple first metal mesh strips and the multiple second metal strips 12 onto the substrate 1 can include multiple first metal mesh sub-strips 11, multiple second metal mesh sub-strips 22, and multiple third metal mesh sub-strips 33, thereby constituting multiple repeating units 100. Each repeating unit 100 includes a first metal mesh sub-strip 11, a second metal mesh sub-strip 22, and a third metal mesh sub-strip 33 arranged sequentially along a first direction X. The multiple repeating units 100 are arranged sequentially along the first direction X. Each repeating unit 100 includes multiple repeating sub-units 10 arranged along a second direction Y. Each repeating sub-unit 10 includes a four-row, three-column structure consisting of four first blocks, four second blocks, and four third blocks. The first row includes a first block, a second block, and a third block arranged sequentially along the first direction X. Each of the second and fourth rows includes a second block, a third block, and a first block arranged sequentially along the first direction. The third row includes a third block, a first block, and a second block arranged sequentially along the first direction. Figure 1A As shown, the first block includes mutually contacting first sub-blocks 20 and 30 arranged along the first direction X; the second block includes mutually contacting third sub-blocks 40 and 20 arranged along the first direction X; and the third block includes mutually contacting second sub-blocks 30 and 40 arranged along the first direction X. The contact positions of the mutually contacting first sub-blocks 20 and 30 in each of the first blocks in the first row to the third row overlap with the orthographic projection of a corresponding metal connection structure among the plurality of metal connection structures onto the substrate. Figure 1A It can be seen that the orthographic projection of the multiple metal connection structures 600 on the substrate 1 does not fall within the structure of the fourth row, but only within the structures of the first, second and third rows.

[0059] In one embodiment, such as Figure 1A As shown, the first sub-block 20, the second sub-block 30, and the third sub-block 40 are all hexagons extending along the second direction Y; the length of the third sub-block 40 along the second direction Y is greater than the length of the first sub-block 20 and the second sub-block 30 along the second direction Y; and the arrangement of the first block and the second block in adjacent rows is staggered by one sub-block position in the first direction X, the arrangement of the second block and the third block in adjacent rows is staggered by one sub-block position in the first direction X, and the arrangement of the first block and the third block in adjacent rows is staggered by one sub-block position in the first direction X.

[0060] like Figure 1AAs shown, on the second surface 300, multiple second metal strips 12 extending generally along the second direction Y divide the second surface 300 into multiple regions; multiple metal connection structures 600 are disposed between two second metal strips 12. Figure 1A In the illustrated embodiment, each repeating subunit 10 includes three metal connection structures 600, such as the first metal connection structure 600-1, the second metal connection structure 600-2, and the third metal connection structure 600-3 shown in FIG. 1. The first end connection line 601 and the second end connection line 901 of the first end 60 and the second end 90 of the first metal connection structure 600-1 are respectively connected to the first connection point a1 and the second connection point a2 on two adjacent second metal strips 12; the first end connection line 601 and the second end connection line 901 of the first end 60 and the second end 90 of the second metal connection structure 600-2 are respectively connected to the first connection point b1 and the second connection point b2 on two adjacent second metal strips 12; the first end connection line 601 and the second end connection line 901 of the first end 60 and the second end 90 of the third metal connection structure 600-3 are respectively connected to the first connection point c1 and the second connection point c2 on two adjacent second metal strips 12. Based on this, each second metal strip 12 will include multiple first connection points and second connection points resulting from the connection of the first end connection line 601 and the second end connection line 602. For example, for Figure 1A For a second metal strip 122, which extends approximately along the second direction Y, a first metal connection structure 600-1 is connected to the second metal strip 122 via a first end connection line 601, with the connection point at the first connection point a1; a second metal connection structure 600-2 is connected to the second metal strip 122 via a second end connection line 901, with the connection point at the second connection point b1; and so on. In adjacent repeating sub-units 10 along the second direction Y, the second metal strip 122 also sequentially includes a first connection point a1, a second connection point b2, and so on. That is, each second metal strip 12 includes alternating first and second connection points. The notch 500 described above is provided between every two adjacent first and second connection points. For example, for each metal connection structure 600, a first notch is provided on one side of the first connection point, and a second notch is provided on one side of the second connection point, thereby forming multiple independent touch blocks.

[0061] Furthermore, by Figure 1AIt can be seen that the entire display substrate includes multiple repeating sub-units 10, each repeating sub-unit 10 including a four-row, three-column structure. Each row and column of the first three rows and three columns has a metal connection structure 600. This metal connection structure 600 is on a different layer from the metal grid lines 13. However, no metal grid lines 13 are provided on the first surface 200 at the corresponding positions of the metal connection structures 600. Figure 2 As shown, the corresponding ends of the first end 60 and the second end 90 of the metal connection structure 600 on the second surface 300 are electrically connected together by the through holes in the substrate 1 to the metal mesh lines 13 that are broken at the corresponding positions on the first surface 200.

[0062] The touch substrate disclosed herein includes a plurality of touch units (also referred to as touch blocks), each touch unit including multiple rows and columns of repeating sub-units 10. In order to form independently controlled touch blocks, an opening 50 is formed in the connecting line of the metal connection structure corresponding to each of the plurality of repeating sub-units 10 between each adjacent two touch blocks to disconnect the connecting line.

[0063] like Figure 1A As shown in the lower part, in this embodiment, in order to divide the two touch blocks into independent touch blocks so that the two touch blocks are independent of each other, it is necessary to disconnect the connection between the two touch blocks. In the touch substrate of this disclosure, the electrical connection between adjacent repeating sub-units 10 in the first metal mesh sub-strip 11, the second metal mesh sub-strip 22, and the third metal mesh sub-strip 33 extending along the second direction Y can be cut simply by cutting the connection line 80 in the metal connection structure 600 in the repeating sub-unit 10 (i.e., forming an opening 50 in the connection line 80). That is, in this disclosure, the connection lines of the metal connection structures in which repeating sub-units 10 need to be cut can be determined according to the actual required size of the touch block. Figures 1A to 8 As shown, in the touch substrate of this disclosure, since the metal connection structure is located on the second surface 300 of the substrate 1, the opening at the boundary between the two mutually insulated touch blocks is also located on the second metal mesh layer TM1. In this touch substrate, the gap at the boundary between the two touch blocks is located on the second metal mesh layer TM1, and a substrate 1 (e.g., a SiNx film) is disposed between it and the first metal mesh layer TM2. Therefore, after external light is refracted through multiple film layers, the reflectivity of the metal in the second metal mesh layer TM1 is reduced, thereby eliminating the visibility murmur caused by the gap at the boundary.

[0064] In one embodiment of this disclosure, such as Figures 6 to 9 As shown, this embodiment is similar to Figures 1A to 5The embodiment differs in that the touch substrate further includes redundant metal lines 70 made of the same material as the first metal mesh strip and disposed in the same layer on the first surface 200 at positions corresponding to the connection lines 80 of the at least one metal connection structure 600. That is, the redundant metal lines 70 can be considered as part of the first metal mesh layer, disposed on the first surface 200, and are floating; that is, the redundant metal lines 70 are not electrically connected to the first metal mesh layer TM2 and the second metal mesh layer TM1. Figures 6 to 8 As shown, similar to the metal connection structure 600, the redundant metal line 70 also extends along the second direction Y, wherein... Figures 7 to 9 Embodiments according to this disclosure are shown respectively. Figure 6 The diagram shows a cross-sectional view of the touch substrate taken along lines aa', bb', and cc'.

[0065] Similar to Figure 1A The illustrated embodiments, such as Figure 6 As shown in the lower part, in this embodiment, in order to separate the two touch blocks so that the two touch blocks are independent of each other, it is necessary to disconnect the connection between the two touch blocks. In the touch substrate of this disclosure, the electrical connection between adjacent repeating sub-units 10 in the first metal mesh sub-strip 11, the second metal mesh sub-strip 22, and the third metal mesh sub-strip 33 extending along the second direction Y can be severed by cutting the connecting lines in the metal connection structure 600 of the repeating sub-units 10. That is, in this disclosure, the connection lines 80 of the metal connection structure 600 in which the repeating sub-units 10 need to be severed can be determined according to the actual required size of the touch block. Figures 1A to 9 As shown, in the touch substrate of this disclosure, since the metal connection structure is located on the second surface 300 of the substrate 1, the notch at the boundary between the two mutually insulated touch blocks is also located on the second metal mesh layer TM1. Figures 5 to 8 In the embodiment, since the touch substrate also includes redundant metal lines 70 disposed at corresponding positions on the first surface 200 above the opening, after the external light is refracted by multiple film layers, the metal reflection intensity of the first metal mesh layer TM2 is the strongest, and the metal reflection degree of the second metal mesh layer TM1 is relatively weak, thereby eliminating the visibility murmur caused by the gap at the boundary.

[0066] Figure 11A and Figure 11B A schematic diagram of a touch substrate cut into multiple touch blocks according to an embodiment of the present disclosure is shown.

[0067] like Figure 11A As shown, each repeating unit 100 extending along the second direction Y is divided into multiple touch blocks according to the openings 50 provided on the connecting lines 80 in the metal connection structure 600 formed on the second surface 300. Figure 11A As can be seen, the metal mesh lines included in each touch block T11 are composed of metal mesh lines on the first surface 200 and the second surface 300. Two adjacent touch blocks T11 in the second direction Y of each repeating unit are disconnected at the opening 50. Two repeating units 100 connected in the first direction X are disconnected at the metal strip 12 provided on the second surface 300. See the detailed segmentation diagram. Figure 11B .exist Figure 11B In this context, each touch block T11 is composed of metal mesh lines on the first surface 200 and the second surface 300. Figure 11B The metal mesh lines included in each touch block T11 shown only represent the sum of the mesh lines involved in the touch operation, which are respectively disposed on the first surface 200 and the second surface 300. (Refer to the above-mentioned appendix...) Figures 1A to 9 It can be known that, Figure 11A Some of the touch grid lines shown appear to be connected, but are actually not. Figure 11B Only the orthographic projection of the multiple grid lines included in each touch area T11 onto the substrate 1 is shown. Additionally, Figure 11B The diagram shows multiple rings, such as T100 and T200, which indicate, for example... Figure 1A and Figure 6 The image shows the locations of the notches 500 that divide the second metal strip 12 on the second surface 300 along the second direction Y. At these locations, it can be seen that the metal mesh lines are broken.

[0068] Figure 11A and Figure 11B This disclosure only illustrates one method of cutting the touch substrate according to an embodiment of the present disclosure. However, the present disclosure is not limited thereto. As described above, based on the arrangement of sub-pixels in the display panel to which it is to be combined, the arrangement of metal grid lines on the second surface and the second surface of the touch substrate can be determined according to the sub-pixels. The main basis is that the orthographic projection of the metal grid lines on the substrate does not overlap with the orthographic projection of the light-emitting area of ​​the sub-pixel on the substrate, thereby ensuring the light-emitting quality of the display panel.

[0069] The invention is not limited thereto. The openings 50 on the connecting lines 80 can be set according to the touch accuracy. For example, openings 50 can be set on the connecting lines 80 of each metal connecting structure 600 on the second surface 300. In this way, the area covered by the formed touch block will be smaller than that of the connecting lines 80 on the second surface 300. Figure 11A and Figure 11B The area of ​​the touch area shown is [not specified]. Similarly, the area of ​​each touch area can be increased by setting fewer openings 50.

[0070] Alternatively, the width of the touch block in the first direction can be increased by controlling the area covered by the repeating unit 100 in the first direction X, thereby increasing the area of ​​the touch block. This will not be described in detail here.

[0071] Based on the above-described touch substrate, this disclosure also provides a touch display substrate, which includes a display substrate arranged in a cell and the touch substrate described above. The display substrate includes a plurality of pixel units, and each pixel unit includes a plurality of sub-pixels. In one embodiment, the plurality of pixel units are arranged in an array, and the plurality of pixel units overlap with the orthographic projection of the plurality of repeating sub-units onto the substrate 1.

[0072] The first sub-pixel is red, the second sub-pixel is green, and the third sub-pixel is blue. Each of the multiple sub-pixels includes an organic light-emitting diode (OLED).

[0073] In this disclosure, to save on photomasks, a mesh-like metal line on the touch substrate can be fabricated using a photomask used to fabricate multiple sub-pixels of pixel units on the display substrate. Therefore, the formed mesh-like metal line can correspond one-to-one with multiple sub-pixels on the display substrate. Thus, after the display substrate and touch substrate are aligned, the first sub-block 20 can correspond to a red sub-pixel, the second sub-block 30 to a green sub-pixel, and the third sub-block 30 to a blue sub-pixel. However, this disclosure is not limited to this. The mesh-like metal line can also have other structures, as long as each repeating sub-unit contains multiple metal mesh sub-strips extending along the second direction Y, where metal connection structures on the second metal mesh layer TM1 are required to connect the metal lines. When it is necessary to disconnect the metal lines to form an independent touch module, the connecting lines of the metal connection structures at specific locations on the second metal mesh layer TM1 can be disconnected, thereby separating the metal mesh sub-strips extending along the second direction Y from adjacent metal mesh sub-strips at specific locations.

[0074] In this embodiment, to separate the two touch blocks of the touch display substrate so that the two touch blocks are independent of each other, it is necessary to disconnect the connection between the two touch blocks. In the touch display substrate of this disclosure, the electrical connection between adjacent repeating sub-units 10 in the first metal mesh sub-strip 11, the second metal mesh sub-strip 22, and the third metal mesh sub-strip 33 extending along the second direction Y can be severed by cutting the connecting lines in the metal connection structure of the repeating sub-unit 10. That is, in this disclosure, the connection lines of the metal connection structure in which repeating sub-units 10 need to be severed can be determined according to the actual required size of the touch block. For example... Figures 1A to 8As shown, in the touch substrate of this disclosure, since the metal connection structure is located on the second surface 300 of the substrate 1, the notch at the boundary between the two mutually insulated touch blocks is also located on the second metal mesh layer TM1. Including Figures 1A to 4 In the touch display substrate shown, the notch at the boundary between two touch blocks is located on the second metal mesh layer TM1, and a substrate 1 (e.g., a SiNx film) is disposed between it and the first metal mesh layer TM2. Therefore, after external light is refracted through multiple film layers, the reflectivity of the metal in the second metal mesh layer TM1 is reduced, thereby eliminating the visibility murmur caused by the notch at the boundary. Figures 5 to 8 In an embodiment of the touch display substrate of the touch substrate, since the touch substrate also includes redundant metal lines 70 disposed at corresponding positions on the first surface 200 above the notch, after the external light is refracted by multiple film layers, the metal reflection intensity of the first metal mesh layer TM2 is the strongest, and the metal reflection degree of the second metal mesh layer TM1 is relatively weak, thereby eliminating the visibility murmur caused by the notch at the boundary.

[0075] like Figure 1A As shown, the touch substrate of this disclosure can be considered to include a plurality of first sub-blocks 20, a plurality of second sub-blocks 30, and a plurality of third sub-blocks 40. However, this disclosure is not limited thereto, and the shape and arrangement of the first sub-blocks, second sub-blocks, and third sub-blocks can be configured according to actual needs and the above concept of this disclosure. Figure 1A and Figure 1B The illustration shows a touch substrate comprising multiple grids defined by metal lines. The specific shape and size of these grids are configured to match the arrangement of individual sub-pixels within a pixel unit in a display substrate. For example, individual pixel units in a conventional display substrate include sub-pixels of three different colors: red (R), green (G), and blue (B). The RGB sub-pixel arrangement within the pixel unit may include, for example, a delta arrangement (see...). Figure 10A ) and mosaic arrangement (see Figure 10B There are two methods. And this disclosure is as follows: Figure 1A The sub-blocks in the touch panel shown can be arranged with a delta (see...) Figure 10A Each sub-pixel corresponds to a specific sub-pixel to avoid the grid-like metal lines on the touch substrate obscuring the light-emitting area of ​​the sub-pixels and affecting the display effect of the display substrate. For Figure 10A and Figure 10B The pixel structure of the display panel shown is as follows: Figure 1A and Figure 6 There is no need to set additional metal lines 110 on the touch substrate, so as to avoid the additional metal lines blocking the light-emitting area of ​​the sub-pixels and thus affecting the display effect of the display panel.

[0076] Therefore, the arrangement of the grid-like metal lines on the touch substrate in this disclosure is not limited to... Figure 1A The shape shown. For example, it can be based on... Figure 10B The display substrate shown uses a strip-shaped array of sub-pixels to form a grid of metal lines in the touch substrate, such as... Figure 10C As shown.

[0077] Similar to Figure 1A , Figure 10C A schematic diagram of the structure of a touch substrate according to an embodiment of the present disclosure is shown. Figure 1A The difference is that, Figure 10C The wiring of the touch area of ​​the touch board shown corresponds to Figure 10B The layout of the subpixel array in the illustrated display substrate is such that the orthographic projection of the wiring for the touch area onto the substrate substantially surrounds the periphery of each subpixel of the subpixel array. This prevents the wiring of the touch area from affecting the display of the subpixel array in the display substrate, thereby avoiding impacting the aperture ratio of the display substrate. The touch substrate also includes a first metal mesh layer disposed on a first surface of the substrate and a second metal mesh layer disposed on a second surface. Similar to... Figure 1A The metal mesh of the touch substrate shown. Figure 10C The combination of the first metal mesh layer and the second metal mesh layer projected onto the substrate also includes a plurality of repeating units 100', which are arranged sequentially along the first direction X; each repeating unit 100' extends along the second direction Y and includes a plurality of repeating sub-units 10'.

[0078] Similar to Figure 1A The wiring of the touch board shown is as follows. Figure 10C The wiring on the second surface 300 of the substrate of the touch substrate also includes a second metal strip 12'. A metal connection structure is connected between two adjacent second metal strips 12', which includes a first end 60', a second end 90', and a metal connection line 80' between them. In addition, an opening 500' is also provided between every two adjacent connection points on the second metal strip 12'.

[0079] and Figure 1A The touch substrate shown is different from the one shown, based on Figure 10B The layout of the sub-pixel array in the display substrate shown is as follows: Figure 10C The wiring on the touch substrate shown can be a straight line extending along the first and second directions, instead of... Figure 1AThe second metal strip 12 shown is a zigzag line extending approximately along the second direction, and its branch portions are straight lines extending at a certain angle to both the second and first directions. As shown above, the wiring arrangement of the touch blocks on the touch substrate in this disclosure is generally based on the layout of the sub-pixel array in the corresponding display substrate. Therefore, this disclosure does not limit this arrangement, as long as the wiring on the first surface and the wiring on the second surface can be combined to realize a self-contained touch block.

[0080] In addition, from Figure 1A and Figure 10C It can be seen that, Figure 10C Each repeating sub-unit is a three-row, three-column structure, instead of... Figure 1A The four-row, three-column structure shown also depends on the layout of the sub-pixel array on the display substrate.

[0081] against Figure 1A , Figure 1B and Figure 6 The touch substrate shown includes an additional metal line 110, which is particularly suitable for display panels including GGRB pixel units, specifically as follows: Figure 10D The diagram shows a display panel including a display substrate and a touch substrate. The GGRB pixel unit of the display substrate includes two green sub-pixels 101G and 102G, one red sub-pixel R, and one blue sub-pixel B. The orthographic projection of the additional metal line 110 on the touch substrate is located between the two green sub-pixels of each pixel unit, thereby increasing the coverage of the touch grid lines without obstructing the light-emitting areas of the sub-pixels on the display substrate and thus affecting the display quality of the display panel. In this case, the first sub-block 20 will be divided into two parts, a first part and a second part, for example, the first part and the second part can be symmetrical with respect to the additional metal line 110. The first part of the orthographic projection on substrate 1 will completely surround the orthographic projection of one of the two green sub-pixels, sub-pixel 101G, on substrate 1. The second part of the orthographic projection on substrate 1 will completely surround the orthographic projection of the other of the two green sub-pixels, sub-pixel 102G, on substrate 1. The second sub-block 30 of the orthographic projection on substrate 1 will completely surround the orthographic projection of the red sub-pixel 101R on substrate 1. The third sub-block 40 of the orthographic projection on substrate 1 will completely surround the orthographic projection of the blue sub-pixel 101B on substrate 1.

[0082] As described above, the metal grid of the touch block of the self-contained touch substrate of this disclosure is determined by the wiring on the first and second surfaces of the substrate. The opening at the boundary of the touch block is located in the second metal grid layer on the side away from the display surface. Therefore, after external light is refracted by multiple film layers, the reflectivity of the metal in the second metal grid layer is reduced, thereby eliminating the visibility murmur caused by the gap at the boundary.

[0083] The present disclosure has been described above, but it is not limited thereto. Those skilled in the art can make various modifications to the above embodiments based on the concept of the present disclosure, and these modifications should also be within the scope of protection of this application.

Claims

1. A touch substrate, comprising: The substrate includes opposing first and second surfaces; A first metal mesh layer disposed on a first surface of a substrate, the first metal mesh layer comprising a plurality of first metal mesh strips arranged sequentially along a first direction, with adjacent first metal mesh strips being independent of each other, and the first metal mesh strips extending along a second direction orthogonal to the first direction and comprising a plurality of metal mesh lines arranged in a grid pattern, the plurality of metal mesh lines comprising a plurality of main sections extending along the second direction and a plurality of branch sections connected to the plurality of main sections and extending from the main sections along a direction at a predetermined angle to the second direction, the plurality of main sections of the plurality of metal mesh lines of the first metal mesh strip having at least one opening in the second direction, such that the first metal mesh strip includes at least one opening in the second direction; and A second metal mesh layer disposed on a second surface of a substrate, the second metal mesh layer comprising a plurality of metal connection structures, the metal connection structures comprising a first end, a second end, and a metal connection line between the first end and the second end; Wherein, the orthographic projection of the metal connecting line on the substrate at least partially overlaps with the orthographic projection of the corresponding opening in the at least one opening on the substrate, and the first end and the second end are electrically connected to the corresponding metal mesh line in the first metal mesh strip through a via provided in the substrate.

2. The touch substrate according to claim 1, wherein, At least one end of the at least one opening in the plurality of metal mesh lines includes two adjacent disconnected branch portions, and one of the first end and the second end in the metal connection structure connects the two adjacent disconnected branch portions together through a through hole provided in the substrate.

3. The touch substrate according to claim 2, wherein, The metal connecting lines in the metal connection structure extend along the second direction.

4. The touch substrate according to any one of claims 1 to 3, wherein, A redundant metal line is also provided on the first surface at a position corresponding to the connection line of the at least one metal connection structure, and the redundant metal line is floating and is of the same layer and material as the first metal mesh strip.

5. The touch substrate according to claim 4, wherein, The second metal mesh layer further includes multiple second metal strips extending along the second direction; and The plurality of second metal strips are arranged sequentially along the first direction.

6. The touch substrate according to claim 5, wherein, The orthographic projections of two adjacent second metal strips on the substrate overlap with the outer contour of the orthographic projection of the corresponding metal mesh strip on the substrate.

7. The touch substrate according to claim 6, wherein, The metal connection structure further includes a first end connection line connected to the first end and a second end connection line connected to the second end; The first end connecting line is connected to the second metal strip, and the intersection of the two is the first connection point on the second metal strip; the second end connecting line is connected to the adjacent second metal strip, and the intersection of the two is the second connection point on the second metal strip; and The second metal strip also includes a first notch on one side of the first connection point and a second notch on the same side of the second connection point.

8. The touch substrate according to claim 7, wherein, The orthographic projections of multiple branches of the metal mesh lines of the first metal mesh layer onto the substrate at least partially overlap with the orthographic projections of the first end connection line and the second end connection line onto the substrate.

9. The touch substrate according to claim 7 or 8, wherein, The sum of the orthographic projections of the plurality of first metal mesh strips and the plurality of second metal strips on the substrate includes a plurality of first metal mesh sub-strips, a plurality of second metal mesh sub-strips and a plurality of third metal mesh sub-strips, thereby constituting a plurality of repeating units. Each repeating unit includes a first metal mesh sub-strip, a second metal mesh sub-strip and a third metal mesh sub-strip, and the plurality of repeating units are arranged sequentially along a first direction. Each repeating unit includes multiple repeating sub-units arranged along the second direction. Each repeating sub-unit includes a four-row, three-column structure consisting of four first blocks, four second blocks, and four third blocks. The first row includes the first block, the second block, and the third block arranged sequentially along the first direction. Each of the second and fourth rows includes the second block, the third block, and the first block arranged sequentially along the first direction. The third row includes the third block, the first block, and the second block arranged sequentially along the first direction. The first block includes a first sub-block and a second sub-block that are in contact with each other and arranged along a first direction; the second block includes a third sub-block and a first sub-block that are in contact with each other and arranged along a first direction; and the third block includes a second sub-block and a third sub-block that are in contact with each other and arranged along a first direction. as well as The contact positions of the first and second sub-blocks in each of the first blocks in the first to third rows overlap with the orthographic projection of the corresponding metal connection structure in the plurality of metal connection structures onto the substrate.

10. The touch substrate according to claim 9, wherein, The orthographic projection of the plurality of metal connection structures onto the substrate falls within the structures of the first, second, and third rows.

11. The touch substrate according to claim 10, wherein, The first sub-block, the second sub-block, and the third sub-block are all hexagons extending along the second direction; The length of the first sub-block along the second direction is greater than the lengths of the second sub-block and the third sub-block along the second direction; as well as The first and second blocks of adjacent rows are staggered by a predetermined distance in a first direction such that a third sub-block in the second block is located between the first and second sub-blocks in the first block in the first direction; the second and third blocks of adjacent rows are staggered by a predetermined distance in a first direction such that a second sub-block in the second block is located between the third and first sub-blocks in the third block in the first direction; and the first and third blocks of adjacent rows are staggered by a predetermined distance in a first direction such that a second sub-block in the third block is located between the first and second sub-blocks in the first block in the first direction.

12. The touch substrate according to claim 7 or 8, wherein, The sum of the orthographic projections of the plurality of first metal mesh strips and the plurality of second metal strips on the substrate includes a plurality of first metal mesh sub-strips, a plurality of second metal mesh sub-strips and a plurality of third metal mesh sub-strips, thereby constituting a plurality of repeating units. Each repeating unit includes a first metal mesh sub-strip, a second metal mesh sub-strip and a third metal mesh sub-strip, and the plurality of repeating units are arranged sequentially along a first direction. Each repeating unit includes multiple repeating sub-units arranged along the second direction. Each repeating sub-unit includes a three-row, three-column structure consisting of three first blocks, three second blocks, and three third blocks. The first row includes the first block, the second block, and the third block arranged sequentially along the first direction. The second row includes the second block, the third block, and the first block arranged sequentially along the first direction. The third row includes the third block, the first block, and the second block arranged sequentially along the first direction. The first block includes a first sub-block and a second sub-block that are in contact with each other and arranged along a first direction; the second block includes a third sub-block and a first sub-block that are in contact with each other and arranged along a first direction; and the third block includes a second sub-block and a third sub-block that are in contact with each other and arranged along a first direction. as well as The contact positions of the first and second sub-blocks in each of the first blocks in the first to third rows overlap with the orthographic projection of the corresponding metal connection structure in the plurality of metal connection structures onto the substrate.

13. The touch substrate according to claim 12, wherein, The first sub-block, the second sub-block, and the third sub-block are all rectangles extending along the second direction; The length of the first sub-block along the second direction is greater than the lengths of the second sub-block and the third sub-block along the second direction; as well as The first and second blocks of adjacent rows are aligned in the first direction, the second and third blocks of adjacent rows are aligned in the first direction, and the first and third blocks of adjacent rows are aligned in the first direction.

14. The touch substrate according to claim 9, wherein, Each second metal strip includes a plurality of alternating first connection points and a plurality of second connection points, and An opening is provided between each adjacent first connection point and second connection point.

15. The touch substrate according to claim 9, wherein, The first metal mesh strip at the location of the first sub-block includes additional metal lines that are in contact with and connected to the metal mesh lines extending in the second direction among the plurality of metal mesh lines, and The additional metal wire extends along the first direction.

16. A touch display panel, comprising a display substrate and a touch substrate according to any one of claims 9 to 15.

17. The touch display panel according to claim 16, wherein, The display substrate includes multiple pixel units, each pixel unit including a first sub-pixel, a second sub-pixel, and a third sub-pixel; and The orthographic projection of the first sub-block on the substrate surrounds the orthographic projection of the first sub-pixel on the substrate, the orthographic projection of the second sub-block on the substrate surrounds the orthographic projection of the second sub-pixel on the substrate, and the orthographic projection of the third sub-block on the substrate surrounds the orthographic projection of the third sub-pixel on the substrate.

18. The touch display panel according to claim 16, wherein, The first metal mesh strip at the location of the first sub-block includes an additional metal line that contacts and connects with one of the plurality of metal mesh lines extending in a second direction, and the additional metal line extends in a first direction and divides the first sub-block into a first part and a second part. The display substrate includes multiple pixel units, and each pixel unit includes two first sub-pixels, one second sub-pixel, and one third sub-pixel; as well as The orthographic projection of the first portion onto the substrate surrounds the orthographic projection of one of the two first sub-pixels onto the substrate, the orthographic projection of the second portion onto the substrate surrounds the orthographic projection of the other of the two first sub-pixels onto the substrate, the orthographic projection of the second sub-block onto the substrate surrounds the orthographic projection of the second sub-pixel onto the substrate, and the orthographic projection of the third sub-block onto the substrate surrounds the orthographic projection of the third sub-pixel onto the substrate.

19. The touch display panel according to claim 18, wherein, The first sub-pixel includes a green sub-pixel, the second sub-pixel includes a red sub-pixel, and the third sub-pixel includes a blue sub-pixel.

Images