Display boards and display devices

Abstract

The display substrate disclosed in the present invention includes a base substrate, an annular blocking dam, and a touch metal layer, the base substrate includes a display area and a frame area arranged around the display area, the blocking dam is arranged around the display area within the frame area, the touch metal layer is located on a side of the layer where the blocking dam is located away from the base substrate, the touch metal layer includes a plurality of touch electrodes and a plurality of touch signal lines electrically connected to the touch electrodes, the touch electrodes are at least partially located in the display area, the touch signal lines are located in the frame area, the touch signal lines include a plurality of first routing wires and a plurality of second routing wires, the orthogonal projection of the first routing wires on the base substrate is located between the orthogonal projection of the blocking dam on the base substrate and the display area, and the orthogonal projection of the second routing wires on the base substrate is located on a side of the orthogonal projection of the blocking dam on the base substrate away from the display area.

Description

Technical Field

[0001] Cross - reference to Related Applications This application claims priority based on a Chinese patent application filed with the Chinese Patent Office on January 4, 2021, with an application number of 202110002159.7 and an invention title of "Display Substrate and Display Device", and incorporates all of its disclosures herein.

[0002] The present invention relates to the field of display technologies, and particularly to display substrates and display devices.

Background Art

[0003] An organic light - emitting diode (OLED) display device is a display screen based on organic light - emitting diodes. OLED display devices have increasingly attracted attention and have a broader application prospect due to excellent features such as self - emission, high contrast ratio, thinness, wide viewing angle, fast response speed, applicability to flexible panels, wide operating temperature range, simple structure and manufacturing process. Conventionally, in order to realize the integration of the display function and the touch function of an OLED display device, the touch function has been integrated by embedding a touch structure in the OLED display module.

Summary of the Invention

Problems to be Solved by the Invention

[0004] In one aspect, embodiments of the present invention provide a display substrate. The display substrate includes a base substrate, at least one annular blocking dam, and a touch metal layer. The base substrate includes a display area and a frame area disposed around the display area. At least one annular blocking dam is disposed around the display area within the frame area. The touch metal layer is located on the side of the layer on which the blocking dam is located that is away from the base substrate, and the touch metal layer includes a plurality of touch electrodes and a plurality of touch signal lines electrically connected to the plurality of touch electrodes, wherein the plurality of touch electrodes are at least partially located in the display area and the plurality of touch signal lines are located in the frame area, and the plurality of touch signal lines include a plurality of first routing wires and a plurality of second routing wires arranged parallel to a first direction, wherein the orthographic projection of the plurality of first routing wires on the base substrate is located between the orthographic projection of the blocking dam on the base substrate and the display area, and the orthographic projection of the plurality of second routing wires on the base substrate is located on the side of the orthographic projection of the blocking dam on the base substrate that is away from the display area.

[0005] Optionally, the display substrate provided by an embodiment of the present invention further comprises an organic insulating layer having a first groove, the first groove being positioned between the orthographic projection of the blocking dam on the base substrate and the orthographic projection of a plurality of the first routing wires on the base substrate. The number N1 of the multiple first routing wires satisfies N1 ≤ (D - d1 - d2) / (d3 + d4), and the number N2 of the multiple second routing wires satisfies N2 ≥ N - N1, where, D is the shortest distance between the boundary of the display area and the blocking dam, d1 is the shortest distance between the first groove and the first routing wire, d2 is the width of the first groove in the second direction, d3 is the width of the first routing wire L1, d4 is the spacing between adjacent first routing wires, and N is the total number of the multiple touch signal lines.

[0006] Optionally, in the display board provided by the embodiment of the present invention, the number of the plurality of first routing wires is 27 or less, and the number of the plurality of second routing wires is 23 or less.

[0007] Optionally, in the display board provided by an embodiment of the present invention, the plurality of touch signal lines include a plurality of third routing wires and a plurality of fourth routing wires arranged parallel to the second direction, where, The second direction intersects the first direction, The third and first routing wires have a one-to-one correspondence as an integrated structure, and the fourth and second routing wires have a one-to-one correspondence as an integrated structure. The orthographic projections of the plurality of the third routing wires and the plurality of the fourth routing wires on the base substrate span the orthographic projection of the blocking dam on the base substrate.

[0008] Optionally, in the display substrate provided by an embodiment of the present invention, the frame region includes a bent region of the blocking dam located away from the display region. The orthographic projection of the second routing wire on the base substrate is located between the orthographic projection of the blocking dam on the base substrate and the bending region. The orthographic projection of the third routing wire on the base substrate is located between the orthographic projection of the corresponding first routing wire on the base substrate and the bending region. The orthographic projection of the fourth routing wire on the base substrate lies between the orthographic projection of the corresponding second routing wire on the base substrate and the orthographic projection of the first routing wire on the base substrate.

[0009] Optionally, in the display substrate provided by an embodiment of the present invention, the frame region further includes a pad region located on the side of the bending region away from the blocking dam, The plurality of touch signal lines further include a plurality of the fifth routing wires and a plurality of sixth routing wires arranged parallel to the second direction, where, The plurality of fifth and sixth routing wires are arranged side by side with the second routing wire adjacent to the central axis of the base substrate in the second direction. The fifth routing wire, the third routing wire, and the first routing wire are a one-to-one integrated structure, the fifth routing wire is connected to one end of the first routing wire adjacent to the central axis of the base substrate in the second direction via the third routing wire, and the fifth routing wire extends through the bending region to the pad region. The sixth routing wire, the fourth routing wire, and the second routing wire are integrally structured in a one-to-one correspondence. The fourth routing wire is connected to the other end of the second routing wire, which is away from the central axis of the base substrate in the second direction. The sixth routing wire is connected to one end of the second routing wire, which is adjacent to the central axis of the base substrate in the second direction. The sixth routing wire extends through the bending region to the pad region.

[0010] Optionally, in the display board provided by an embodiment of the present invention, one end of the first routing wire, which is away from the central axis of the base board in the second direction, and one end of the fourth routing wire, which is away from the second routing wire, are arranged in the frame region adjacent to the frame region where the plurality of third routing wires are arranged. Furthermore, the orthographic projection on the base substrate of one end of the first routing wire, which is away from the central axis of the base substrate in the second direction, and the orthographic projection on the base substrate of one end of the fourth routing wire, which is away from the second routing wire, are positioned between the orthographic projection of the blocking dam on the base substrate and the display area.

[0011] Optionally, in the display board provided by an embodiment of the present invention, the plurality of touch signal lines further include a plurality of seventh routing wires and a plurality of eighth routing wires arranged parallel to the second direction, where, The seventh routing wire and the first routing wire have a one-to-one correspondence and are integrated in structure, and the seventh routing wire is connected to one end of the first routing wire that is away from the central axis of the base substrate in the second direction. The eighth and fourth wiring wires have a one-to-one correspondence and are integrated in structure, with the eighth wiring wire connected to one end of the fourth wiring wire, which is separated from the second wiring wire.

[0012] Optionally, in the display board provided by an embodiment of the present invention, the plurality of touch signal lines are divided into two groups, and the two groups of touch signal lines are arranged symmetrically with respect to the central axis of the base board in the second direction.

[0013] Optionally, in the display board provided by an embodiment of the present invention, the widths of the first and second wiring wires are smaller than those of the third wiring wire, and the widths of the fourth, fifth, and sixth wiring wires, the first and second wiring wires are approximately equal to the widths of the seventh and eighth wiring wires.

[0014] Optionally, in the display substrate provided by an embodiment of the present invention, the widths of the first and second wiring wires are 3 μm to 20 μm, the widths of the third, fourth, fifth, and sixth wiring wires are 5 to 20 μm, and the widths of the seventh and eighth wiring wires are 3 μm to 20 μm.

[0015] Optionally, in the display board provided by the embodiment of the present invention, the resistance values ​​of the touch signal lines are substantially the same.

[0016] Optionally, in the display substrate provided by an embodiment of the present invention, the organic insulating layer further includes a second groove, where the second groove is located on a side away from the display area, and the orthographic projection of the second routing wire on the base substrate is located within the second groove. of It is located on a side away from the display area, The orthographic projection of the second routing wire on the base substrate is located within the second groove.

[0017] Optionally, in the display substrate provided by an embodiment of the present invention, the shortest distance between the orthographic projection of the first routing wire on the base substrate and the orthographic projection of the blocking dam on the base substrate is greater than the shortest distance between the orthographic projection of the second routing wire on the base substrate and the orthographic projection of the blocking dam on the base substrate.

[0018] Optionally, in the display substrate provided by an embodiment of the present invention, the shortest distance between the orthographic projection of the first routing wire on the base substrate and the orthographic projection of the blocking dam on the base substrate is 30 μm - 200 μm, and the shortest distance between the orthographic projection of the second routing wire on the base substrate and the orthographic projection of the blocking dam on the base substrate is 10 μm - 100 μm.

[0019] Optionally, in the display substrate provided by an embodiment of the present invention, in the second direction, the width of the first groove is smaller than the width of the second groove.

[0020] Optionally, the display substrate provided by an embodiment of the present invention further includes at least one shield wire, The at least one shield wire is disposed on at least one side of a plurality of the first routing wires and / or on at least one side of a plurality of the second routing wires in the second direction.

[0021] Optionally, in the display substrate provided by the embodiment of the present invention, the at least one shield wire is arranged to surround the touch signal line including the first routing wire, and / or the at least one shield wire is arranged to surround the touch signal line including the second routing wire.

[0022] Optionally, the display substrate provided by the embodiment of the present invention further includes a crack detection line arranged on the side of the shield wire away from the display area. The crack detection line straddles a blocking dam in the frame area where the first routing wire is arranged, and is arranged between the blocking dam and the display area in other frame areas.

[0023] Optionally, the display substrate provided by the embodiment of the present invention further includes a ground wire arranged between the shield wire and the crack detection line, and the routing direction of the ground wire is substantially the same as the routing direction of the shield wire.

[0024] Optionally, in the display substrate provided by the embodiment of the present invention, in the direction away from one side of the base substrate, the distance between the first routing wire and the base substrate is greater than the distance between the second routing wire and the base substrate.

[0025] In another aspect, the embodiment of the present invention further provides a display device including the above display substrate.

Brief Description of Drawings

[0026] [Figure 1] It is a schematic plan structure diagram of the display substrate provided by the embodiment of the present invention. [Figure 2] It is a schematic structure enlarged view of area N in FIG. 1. [Figure 3] It is another schematic structure enlarged view of area N in FIG. 1. [Figure 4]Figure 3 is a schematic cross-sectional view of the structure along line I-II. [Figure 5] Figure 3 is a schematic structural cross-sectional view along line III-IV. [Figure 6] This is a schematic, enlarged view of region M in Figure 1. [Figure 7] This is another schematic plan view of a display board provided by an embodiment of the present invention. [Figure 8] This is another schematic plan view of a display board provided by an embodiment of the present invention. [Figure 9] This is another schematic plan view of a display board provided by an embodiment of the present invention. [Figure 10] This is another schematic plan view of a display board provided by an embodiment of the present invention. [Figure 11] This is another schematic plan view of a display board provided by an embodiment of the present invention. [Figure 12] This is another schematic plan view of a display board provided by an embodiment of the present invention. [Figure 13] This is another schematic plan view of a display board provided by an embodiment of the present invention. [Modes for carrying out the invention]

[0027] To further clarify the object, technical solution, and advantages of the embodiments of the present invention, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It should be noted that the size and shape of each figure in the accompanying drawings do not reflect the actual scale and are intended solely to illustrate the content of the invention. The same or similar reference numerals always represent the same or similar elements, or elements having the same or similar function. It is clear that the embodiments described are part of, but not all, embodiments of the present invention. All other embodiments that can be obtained by those skilled in the art without creative work based on the embodiments described of the present invention fall within the scope of protection of the present invention.

[0028] Unless otherwise defined, technical or scientific terms used herein should have a common meaning understood by those skilled in the art to which the present invention pertains. The terms “first,” “second,” and similar terms used in the specification and claims of the present invention do not indicate any order, quantity, or importance, but are used solely to distinguish different components. The words “include,” “inclusive,” and similar words mean that the element or item preceding the word covers the elements or items listed after the word, and their equivalents, without excluding other elements or items. Words such as “inside,” “outside,” “above,” and “below” merely describe relative positions, and the relative position changes if the absolute position of the subject changes.

[0029] In today's market, the demand for thinner display screens (such as those in mobile phones) is increasing, leading to the emergence of Flexible Multi-Layer On Cell (FMLOC) technology. The FMLOC process forms a metal mesh electrode layer in the encapsulation layer of the display module to achieve touch functionality, eliminating the need to add a touch structure, i.e., a touch screen panel (TSP), thus reducing the screen thickness.

[0030] The FMLOC process typically employs two layers of metal: one is a metal mesh (MM) layer, and the other is a bridge metal (BM) layer. The metal mesh layer is located in the display area and can be divided into touch-driving (Tx) and touch-sensing (Rx) metal meshes in the horizontal-vertical direction. One of the Rx and Tx metal meshes is connected to the other, while the other is connected via the bridge metal layer. Furthermore, FMLOC products also feature a blocking dam in the frame area and multiple touch signal lines (trace). The blocking dam surrounds the display area, preventing external water vapor or oxygen from entering. The multiple touch signal lines are positioned between the blocking dam and the display area and are electrically connected to the corresponding Tx and Rx metal meshes, respectively. However, with market developments, demands on product bezels, especially the bottom bezel, have become stricter, and the above design, which places all routing wires between the blocking dam and the display area, significantly limits bezel narrowing.

[0031] To solve the above-mentioned problems in related technologies, one embodiment of the present invention provides a display substrate including a base substrate 101, at least one annular blocking dam 102, and a touch metal layer MM, as shown in Figures 1 and 2.

[0032] The base substrate 101 includes a display area AA and a frame area BB that surrounds the display area AA.

[0033] At least one annular blocking dam 102 is positioned around the display area AA within the frame area BB.

[0034] The touch metal layer MM is located on the opposite side of the base substrate 101 from the layer where the blocking dam 102 is located. The touch metal layer MM includes a plurality of touch electrodes Tx / Rx and a plurality of touch signal lines 103 electrically connected to the plurality of touch electrodes Tx / Rx. Here, the plurality of touch electrodes Tx / Rx are located at least partially in the display area AA, and the plurality of touch signal lines 103 are located in the frame area BB. The plurality of touch signal lines 103 may include a plurality of first routing wires L1 and a plurality of second routing wires L2 arranged parallel to a first direction X. Here, the orthographic projection of the plurality of first routing wires L1 on the base substrate 101 is located between the orthographic projection of the blocking dam 102 on the base substrate 101 and the display area AA. The orthographic projection of the plurality of second routing wires L2 on the base substrate 101 is located on the side of the orthographic projection of the blocking dam 102 on the base substrate 101 that is away from the display area AA.

[0035] In the display board provided by the embodiment of the present invention, a plurality of first routing wires L1 are arranged in the frame area BB inside the blocking dam 102, and a plurality of second routing wires L2 arranged parallel to the first routing wires L1 are arranged in the frame area BB outside the blocking dam 102. This allows for rational use of the space outside the blocking dam 102, effectively reducing the width of the frame area BB within the blocking dam 102 and fulfilling the product requirement for a narrower bezel design.

[0036] In Figure 2, the multiple parallel-arranged first routing wires L1 and multiple second routing wires L2 contained within the lower frame region BB are located on both the inside and outside sides of the blocking dam 102, respectively. Specifically, in the left frame region BB, the right frame region BB, and / or the upper frame region BB, in order to reduce the wiring space between the blocking dam 102 and the display region AA, the touch signal line 103 can be considered to be divided into two parts and positioned on the inside and outside of the blocking dam 102, respectively.

[0037] Optionally, the display substrate provided by embodiments of the present invention may further include an organic insulating layer 104 having a first groove H1, as shown in Figures 1 and 2, the first groove H1 prevents water and oxygen from entering the display area AA, and specifically lies between the orthographic projection of a blocking dam 102 on the base substrate 101 and the orthographic projection of a first routing wire L1 on the base substrate 101, and can contact the blocking dam 102, with the shortest distance between the first groove H1 and the first routing wire L1 being d1. In some embodiments, a slope may be provided between the display area AA and the groove H1, where the shortest distance d1 of the first groove H1 is the shortest distance on a plane parallel to the base substrate, i.e., the shortest distance d1 of the first groove H1 does not include the slope between the display area AA and the groove H1. In other words, if there is a slope between the display area AA and the groove H1, at least some of the multiple first routing wires may be positioned on the slope. In some embodiments, the number N1 of multiple first routing wires L1 satisfies N1 ≤ (D - d1 - d2) / (d3 + d4), where D represents the shortest distance between the boundary of the display area AA (i.e., the boundary between the display area AA and the frame area BB where the first groove H1 is located) and the blocking dam 102. d2 represents the width of the first groove H1 in the second direction Y. d3 represents the width of the first routing wire L1. d4 represents the spacing between the first routing wires L1. The number N2 of multiple second routing wires L2 satisfies N2 ≥ N - N1, where N is the total number of all touch signal lines 103 electrically connected to the Tx metal mesh and the Rx metal mesh. Exemplarily, the number of multiple first routing wires L1 is 27 or less, and the number of multiple second routing wires L2 is 23 or less. Optionally, N1 = (D - d1 - d2) / (d3 + d4) and N2 = N - N1. In this case, the frame area BB of the display panel is the narrowest and does not interfere with the normal display of the display area AA.

[0038] Optionally, in the display board provided by embodiments of the present invention, as shown in Figure 2, the plurality of touch signal lines 103 may further include a plurality of third routing wires L3 and a plurality of fourth routing wires L4 arranged parallel to the second direction Y, where the second direction Y and the first direction X intersect. The third routing wires L3 and the first routing wires L1 are integral structures with a one-to-one correspondence, and the fourth routing wires L4 and the second routing wires L2 are integral structures with a one-to-one correspondence. The orthographic projections of the plurality of third routing wires L3 and the plurality of fourth routing wires L4 on the base board 101 straddle the orthographic projection of the blocking dam 102 on the base board 101.

[0039] By arranging multiple third routing wires L3 and multiple fourth routing wires L4 that straddle the blocking dam 102, on the one hand, the first routing wire L1 inside the blocking dam 102 is brought out to the outside of the blocking dam 102, making it easier to connect the touch signal line 103 to the external drive loop. In some embodiments, the external drive loop may be an electrical connection to a Flexible Print Circuit Board (FPC). On the other hand, by bringing the second routing wire L2 outside the blocking dam 102 to the inside of the blocking dam 102, it is helpful to make an electrical connection between the touch signal line 103 and the Tx metal mesh or Rx metal mesh in the display area AA. Furthermore, the arrangement of the second routing wire L2 allows for rational use of the space outside the blocking dam 102, and as a result, the width of the frame area BB inside the blocking dam 102 can be reduced, enabling the design of a narrower frame area BB.

[0040] Optionally, in the display substrate provided by the embodiment of the present invention, in order to achieve the technical effect of a narrow bezel, a bent region BA may be further positioned on the side of the blocking dam 102 away from the display region AA, as shown in Figure 2. In this case, the orthographic projection of the second routing wire L2 on the base substrate 101 can be located between the orthographic projection of the blocking dam 102 on the base substrate 101 and the bent region BA. The orthographic projection of the third routing wire L3 on the base substrate 101 can be located between the orthographic projection of the corresponding first routing wire L1 on the base substrate 101 and the bent region BA. The orthographic projection of the fourth routing wire L4 on the base substrate 101 can be located between the orthographic projection of the corresponding second routing wire L2 on the base substrate 101 and the orthographic projection of the first routing wire L1 on the base substrate 101. In other words, the third routing wire L 3- The first integrated lead wire L1 extends from the first integrated lead wire L1 to the bending region BA, and the fourth lead wire L4 extends from the second integrated lead wire L2 to the inside of the blocking dam 102.

[0041] Optionally, in the display board provided by an embodiment of the present invention, as shown in Figure 2, the frame region BB may further include a pad region PA located on the side away from the blocking dam 102 in the bending region BA. The plurality of touch signal lines 103 may further include a plurality of fifth routing wires L5 and a plurality of sixth routing wires L6 arranged parallel to the second direction Y. Here, the plurality of fifth routing wires L5 and a plurality of sixth routing wires L6 are arranged side by side with the second routing wire L2 adjacent to the central axis of the base board 101 in the second direction Y. The fifth routing wire L5, the third routing wire L3 and the first routing wire L1 are a one-to-one integrated structure, and the fifth routing wire L5 is connected via the third routing wire L3 to one end of the first routing wire L1 adjacent to the central axis of the base board 101 in the second direction Y. The fifth routing wire L5 extends through the bending region BA to the pad region PA. The sixth routing wire L6, the fourth routing wire L4, and the second routing wire L2 are a one-to-one integrated structure, with the fourth routing wire L4 connected to the other end of the second routing wire L2, which is away from the central axis of the base substrate 101 in the second direction Y. The sixth routing wire L6 is connected to one end of the second routing wire L2, which is adjacent to the central axis of the base substrate 101 in the second direction Y. The sixth routing wire L6 extends through the bending region BA to the pad region PA.

[0042] In other embodiments, the pad area PA has a plurality of contact pads (or bonding pads or pads), each contact pad configured to be electrically connected to one fifth lead wire L5 or one sixth lead wire L6. The contact pads are exposed on the surface of the pad area PA, i.e., not covered by any layer, to facilitate electrical connection with the flexible printed loop substrate. The flexible printed loop substrate is electrically connected to an external controller and configured to transmit signals or power from the external controller to the fifth lead wire L5 and the sixth lead wire L6.

[0043] In some embodiments, the wiring configurations of common (Com) signal lines, power (VDD / VSS) lines, and ground (GND) lines located in the frame region BB can also adopt the wiring configuration of the touch signal line 103. In some embodiments, as shown in Figures 3 to 5, the touch signal line 103 may include a first portion 103a located in the same layer as the metal mesh layer MM, and a second portion 103b located in the same layer as the bridge metal layer BM and electrically connected to the first portion 103a.

[0044] The touch signal line 103 is arranged in a two-layer wiring harness, comprising a first portion 103a and a second portion 103b. Therefore, even if one layer of wiring harness is locally disconnected, the touch signal can still be loaded onto the other metal mesh layer via the other layer of wiring harness. This effectively solves the problem of touch failures that are often caused by disconnections in single-layer wiring harnesses. Furthermore, compared to a single-layer wiring harness design, the two-layer wiring harness also allows for a lower resistance value for the touch signal line 103. During a particular implementation, the first portion 103a and the second portion 103b are electrically connected via via holes penetrating the inorganic insulation layer 105.

[0045] In some embodiments, as shown in Figure 4, in order to equalize the bending stress in the bending region BA, the fifth and sixth lead wires L5 and L6 included in the touch signal line 103 may be transferred from the metal mesh layer MM and bridge metal layer BM to the second source / drain metal layer 106 (SD2) in the bending region BA. Alternatively, the fifth and sixth lead wires L5 and L6 may return to the metal mesh layer MM and bridge metal layer BM in the pad region PA.

[0046] It should be noted that in this invention, touch functionality can be achieved not only by using the mutual-capacitance mode of metal mesh technology, but also by using the self-capacitance mode. When the self-capacitance mode is employed, the display substrate may include multiple self-capacitance electrodes located on different layers from the multiple touch routing wires, and the inorganic insulating layer 105 is located between the layer where the multiple touch routing wires are located and the layer where the multiple self-capacitance electrodes are located. Each touch routing wire is electrically connected to a self-capacitance electrode via a via hole penetrating the inorganic insulating layer 105.

[0047] Furthermore, the display surface of the display board is usually the front by default, and the side opposite the display surface is the back. By bending the bending region BA, the pad region PA, which is located on the side of the bending region BA away from the display region DA, is positioned on the back of the display board, thereby increasing space utilization and reducing the area occupied by the frame region BB.

[0048] Optionally, in the display board provided by the embodiment of the present invention, as shown in Figure 2, one end of the first routing wire L1, which is separated from the central axis of the base board 101 in the second direction Y, and one end of the fourth routing wire L4, which is separated from the second routing wire L2, are located in a frame region adjacent to the frame region where the plurality of third routing wires L3 are located. Furthermore, on the base board 101, the orthographic projection of one end of the first routing wire L1, which is separated from the central axis of the base board 101 in the second direction Y, and the orthographic projection of one end of the fourth routing wire L4, which is separated from the second routing wire L2, are located between the orthographic projection of the blocking dam 102 on the base board 101 and the display region AA.

[0049] As can be seen from the above description, in the present invention, the touch signal line 103, including the first routing wire L1, the third routing wire L3, and the fifth routing wire L5, is bent from the right frame region BB to the lower frame region BB, crosses the blocking dam 102, extends through the bending region BA to the pad region PA, and is electrically connected to the flexible printed loop board. In addition, the touch signal line 103, including the second routing wire L2, the fourth routing wire L4, and the sixth routing wire L6, is bent from the right frame region BB to the lower frame region BB, crosses the blocking dam 102, extends through the bending region BA to the pad region PA, and is electrically connected to the flexible printed loop board. In this way, on the one hand, it is ensured that all touch signal lines 103 do not overlap, and thus undesirable short circuits are avoided. On the other hand, it is ensured that the windings of all touch signal lines 103 are short, and therefore signal delay (RC delay) is avoided. Furthermore, the arrangement of the second routing wire L2 allows for rational use of the space outside the blocking dam 102, thereby reducing the width of the frame area BB inside the blocking dam 102 and enabling the design of a narrow frame area BB.

[0050] Optionally, in the display board provided by an embodiment of the present invention, as shown in Figure 2, the plurality of touch signal lines 103 may further include a plurality of seventh routing wires L7 and a plurality of eighth routing wires L8 arranged parallel to the second direction Y. Here, the seventh routing wire L7 and the first routing wire L1 are a one-to-one integrated structure, and the seventh routing wire L7 is connected to one end of the first routing wire L1 away from the central axis of the base board 101 in the second direction Y. The eighth routing wire L8 and the fourth routing wire L4 are a one-to-one integrated structure, and the eighth routing wire L8 is connected to one end of the fourth routing wire L4 away from the second routing wire L2.

[0051] In the second direction Y, one end of the first routing wire L1, which is away from the central axis of the base substrate 101, is located in a frame region adjacent to the frame region where the multiple third routing wires L3 are arranged. Therefore, the seventh routing wire L7 can extend into the frame region adjacent to the second direction Y. Also, one end of the fourth routing wire L4, which is away from the second routing wire L2, is located in a frame region adjacent to the frame region where the multiple third routing wires L3 are arranged. Therefore, the eighth routing wire L8 can also extend into the same frame region adjacent to the second direction Y. As a result, the wiring length of the touch signal line 103 is shortened to the minimum, the resistance value of the touch signal line 103 is reduced, and signal delay of the touch signal line 103 is avoided.

[0052] Optionally, in the display board provided by the embodiment of the present invention, as shown in Figure 1, a plurality of touch signal lines 103 may be divided into two groups, and the two groups of touch signal lines 103 are arranged correspondingly with respect to the central axis EF of the base board 101 in a second direction Y. Specifically, the wiring configuration of the touch signal lines 103 inside and outside the blocking dam is the same with respect to the central axis EF of the base board 101 in a second direction Y. However, the specific number of the two groups of touch signal lines is not limited; that is, the number of the two groups of touch signal lines may be the same or different. This facilitates balanced wiring, improves process stability, and enables the design of a narrow frame area.

[0053] Optionally, in the display board provided by the embodiment of the present invention, the widths of the first and second wiring wires L1 and L2 may be set smaller than the widths of the third, fourth, fifth, and sixth wiring wires L3, L4, L5, and L6 in order to ensure that the resistance values ​​of all touch signal lines 103 are substantially the same. The widths of the first and second wiring wires L1 and L2 may also be set to be substantially equal to the widths of the seventh and eighth wiring wires L7 and L8.

[0054] In actual implementation, the above "almost" may be "perfectly equal" or there may be some deviation due to the influence of process conditions, measurement limitations, etc. The relationship between the above characteristics is within the scope of protection of the present invention as long as the allowable error (for example, variation is greater than or less than 10%) is met.

[0055] Optionally, in the display substrate provided by the embodiment of the present invention, the widths of the first and second wiring wires L1 and L2 may be 3 μm to 20 μm, for example, 7.3 μm. The widths of the third, fourth, fifth, and sixth wiring wires L3, L4, L5 and L6 may be 5 μm to 20 μm, for example, 9.2 μm. The widths of the seventh and eighth wiring wires L7 and L8 may be 3 μm to 20 μm, for example, 7.2 μm.

[0056] Optionally, the display substrate provided by embodiments of the present invention may further include an organic insulating layer 104. A first groove H1 and a second groove H2 are formed in the organic insulating layer 104. Here, the first groove H1 is located between the blocking dam 102 and the display area AA. The second groove H2 is located on the side of the blocking dam 102 away from the display area AA. The orthographic projection of the first routing wire L1 on the base substrate 101 is located between the first groove H1 and the display area AA. The orthographic projection of the second routing wire L2 on the base substrate 101 is located within the second groove H2.

[0057] In some embodiments, the first groove H1 is configured to isolate the organic insulating layer 104 to prevent water and oxygen from entering the display area AA. The second groove H2 is configured to release bending stress. By positioning the first routing wire L1 inside the blocking dam 102 between the first groove H1 and the display area AA, the first routing wire L1 inside the blocking dam 102 is prevented from overlapping with the first groove H1. Thus, it is possible to prevent the first groove H1 from affecting the existing routing wire mode. Since the second groove H2 does not have an organic sealing layer 109 (IJP) and the structure of the organic insulating layer 104 under the touch signal line 103 is simple and basically a large-area cutout design, the step difference between film layers is small, i.e., the flatness of the film layers is good, so positioning the second routing wire L2 outside the blocking dam 102 in the second groove H2 brings great benefits to the design and process implementation of the touch signal line 103.

[0058] Optionally, in the display substrate provided by the embodiment of the present invention, the distance between the first routing wire L1 and the base substrate 101 in the direction away from one side of the base substrate is greater than the distance between the second routing wire L2 and the base substrate 101. Specifically, as shown in Figure 5, there are more film layers below the film layer of the first routing wire L1 inside the blocking dam 102, and from bottom to top, these are the base substrate 101, the first source / drain metal layer 107 (SD1), the second flat layer 1042 (PLN2), the pixel definition layer 1043 (PDL), the first inorganic encapsulation layer 108, the organic encapsulation layer 109, the second inorganic encapsulation layer 110, and the second etching block layer 111 (BFL2). The film layers beneath the first routing wire L1 on the outside of the blocking dam 102 are few, and from bottom to top, they are the base substrate 101, the first source / drain metal layer 107, the first inorganic encapsulation layer 108, the second inorganic encapsulation layer 110, and the second etching block layer 111. In some embodiments, it is ensured that the widths of the first routing wire L1 and the second routing wire L2 on the inside and outside of the blocking dam 102 are approximately the same. Optionally, the first inorganic encapsulation layer 108, the organic encapsulation layer 109, and the second inorganic encapsulation layer 110 constitute a film encapsulation layer (EPL).

[0059] As shown in Figures 4 and 5, in some embodiments, the organic insulating layer 104 may include a first flat layer 1041 (PLN1), a second flat layer 1042, and a pixel definition layer 1043. The blocking dam 102 may include a first blocking dam 1021 surrounding the display area AA and a second blocking dam 1022 surrounding the first blocking dam 1021. Here, the stacking pattern of the first blocking dam 1021 is located on the second flat layer 1042 and the pixel definition layer 1043. The stacking pattern of the second blocking dam 1022 is located on the first flat layer 1041, the second flat layer 1042, and the pixel definition layer 1043. Compared to the second blocking dam 1022, the first blocking dam 1021 does not have a film layer pattern located on the first flat layer 1041. Therefore, the height of the first blocking dam 1021 relative to the base substrate 101 is smaller than the height of the second blocking dam 1022 relative to the base substrate 101. The longer the time that the external water vapor and oxygen paths enter the display area AA, the less likely they are to enter the display area AA, further improving the blocking ability of the blocking dam 102. In some embodiments, the width of the first blocking dam 1021, the width of the second blocking dam 1022, and the distance between the first and second blocking dams 1021 and 1022 are approximately the same, for example, 30 μm. The cross-sectional shapes of the first blocking dam 1021 and the second blocking dam 1022 may be trapezoidal as shown in Figure 4 or rectangular as shown in Figure 5. In this case, at least one side edge of the first blocking dam 1021 and the second blocking dam 1022 that is close to the display area AA is a slope, but is not limited to this.

[0060] In some embodiments, in order to increase the adhesion force between the third and fourth tie wires L3 and L4 that straddle the blocking dam 102, the widths of the third and fourth tie wires L3 and L4 are narrowed in the gap between the first and second blocking dams 1021 and 1022.

[0061] In this invention, it should be noted that "the inside of the blocking dam 102" specifically refers to the side of the first blocking dam 1021 that is close to the display area AA, and "the outside of the blocking dam 102" specifically refers to the side of the second blocking dam 1022 that is away from the display area AA.

[0062] Furthermore, as shown in Figure 4, the display substrate includes an interlayer dielectric layer 112 (ILD), a gate insulating layer 113 (GI), a first etching block layer 114 (BFL1), a buffer layer 115 (BRL), and a pad layer 116 (PS). Other necessary components of the display substrate should be understood by those skilled in the art and should not be repeated here, nor should they be understood as limitations to the present invention.

[0063] Optionally, in the display board provided by an embodiment of the present invention, as shown in Figure 3, the shortest distance d5 between the orthographic projection of the first routing wire L1 on the base board 101 and the orthographic projection of the blocking dam 102 on the base board 101 is greater than the shortest distance d6 between the orthographic projection of the second routing wire L2 on the base board 101 and the orthographic projection of the blocking dam 102 on the base board 101. As a result, the first routing wire L1 inside the blocking dam 102 can avoid the first groove H1, and therefore the first routing wire L1 inside the blocking dam 102 does not overlap with the first groove H1.

[0064] Optionally, in the display substrate provided by the embodiment of the present invention, the shortest distance d5 between the orthographic projection of the first routing wire L1 on the base substrate 101 and the orthographic projection of the blocking dam 102 on the base substrate 101 can be 30 μm to 200 μm, for example, 48.9 μm. The shortest distance d6 between the orthographic projection of the second routing wire L2 on the base substrate 101 and the orthographic projection of the blocking dam 102 on the base substrate 101 can be 10 μm to 100 μm, for example, 29.4 μm.

[0065] Optionally, in the display substrate provided by embodiments of the present invention, in order to achieve the technical effect of a narrower bezel, as shown in Figure 3, the width d2 of the first groove H1 in the second direction Y is smaller than the width d7 of the second groove H2 in the second direction Y. Exemplarily, the width d2 of the first groove H1 may be 30 μm–50 μm, and the width d7 of the second groove H2 may be 70 μm or more. In some embodiments, as shown in Figure 6, a dummy line 117 extending in the first direction X can be placed between the blocking dam 102 and the first routing wire L1 inside the blocking dam 102, and the dummy line 117 does not overlap with the boundary of the first groove H1. That is, the dummy line 117 may be placed between the first groove H1 and the first routing wire L1, or it may be placed inside the first groove H1.

[0066] Before placing the dummy line 117, the area between the blocking dam 102 and the first routing wire L1 inside the blocking dam 102 is left as an empty area. By placing the dummy line 117 in this empty area, the empty area becomes closer to the structure of the surrounding wiring area, thereby improving process stability and product stability.

[0067] Optionally, the display board provided by embodiments of the present invention may further include at least one shield wire 118 (Guard) to shield from interference, as shown in Figures 7 to 11. The at least one shield wire 118 is located on at least one side of a plurality of first routing wires L1 in a second direction Y, and / or on at least one side of a plurality of second routing wires L2 in a second direction Y.

[0068] In some embodiments, as shown in Figure 7, at least one shielded wire 118 may be positioned around a touch signal line 103 that includes a first routing wire L1. In some embodiments, as shown in Figure 8, at least one shielded wire 118 may be positioned around a touch signal line 103 that includes a second routing wire L2. In some embodiments, there are multiple shielded wires 118, and as shown in Figure 9, multiple shielded wires 118 may be positioned around a touch signal line 103 that includes a first routing wire L1 and a touch signal line 103 that includes a second routing wire L2. In some other embodiments, as shown in Figure 10, there are two shielded wires 118 in at least one group of touch signal lines, one shielded wire 118 positioned on the side of the first routing wire L1 adjacent to the display area AA in a second direction Y, and the other shielded wire 118 positioned on the side of the second routing wire L2 away from the display area AA in a second direction Y. In some other embodiments, as shown in Figure 11, the shield wire 118 may be positioned on both sides of a plurality of first lead wires L1 in a second direction Y. Alternatively, the shield wire 118 may be positioned on both sides of a plurality of second lead wires L2 in a second direction Y.

[0069] During specific implementations, DC signals such as a first power signal Vdd, a second power signal Vss, and an initialization signal Vinit can be loaded onto the shield wire 118 to achieve a better shielding effect. To reduce the number of film layers, the shield wire 118 and the touch signal line 103 may be placed on the same layer.

[0070] Optionally, in the display substrate provided by embodiments of the present disclosure, the sum of the shortest distance between each shield wire 118 and each touch signal line 103 and the wire width of a single shield wire 118 may be greater than 30 μm. This is to better isolate mutual interference between different signals (e.g., signal Tx and signal Rx) on the touch signal lines 103 on both sides of the shield wire 118. In some embodiments, if the signals on the touch signal lines 103 on both sides of the shield wire 118 are the same, the sum of the shortest distance between the shield wire 118 and each touch signal line 103 and the width of a single shield wire 118 may not be particularly limited. In some embodiments, the width of a single shield wire 118 may be about 9.2 μm.

[0071] Optionally, as shown in Figure 12, the display board provided by the embodiment of the present invention may further include a crack detection line 119 (PCD) located on the side of the shield wire 118 away from the display area AA. The crack detection line 119 straddles the blocking dam 102 in frame area BB where the first routing wire L1 is located, and is located between the blocking dam 102 and the display area AA in other frame areas BB.

[0072] The windings for the entire PCD are located on the backplane side and the touch panel side. In some embodiments, there are two loops of the crack detection line 119, namely a left loop and a right loop. One end of the crack detection line 119 is connected to a data line corresponding to a green subpixel of a cell text unit, and the other end is connected to a high-level (VGH) signal, which is provided by the flexible printed loop substrate. If there is no crack, a high voltage is supplied by the data line and input to the green subpixel of the corresponding column, so that a small current flows through the light-emitting device (e.g., OLED) of that green subpixel. The light-emitting device emits almost no light and is in a black state. If there is a crack, the detection voltage signal at that moment is considered to be approximately 0V, and this 0V voltage is input to the green subpixel of the corresponding column, so that a large current flows through the light-emitting device (e.g., OLED) of that green subpixel, so that the light-emitting device emits light and a green bright line appears below the black image. Also, to reduce the number of film layers, the crack detection line 119 and the touch signal line 103 may be placed on the same layer.

[0073] Selectively, as shown in Figure 13, the display board provided by the embodiment of the present invention includes a ground wire 120 (GND) located between the shield wire 118 and the crack detection wire 119. The routing direction of the ground wire 120 is substantially the same as the routing direction of the shield wire 118. During a particular implementation, the ground wire 120 is grounded and no signal is loaded onto it. Also, to reduce the number of film layers, the ground wire 120 and the touch signal wire 103 can be placed on the same layer.

[0074] In some embodiments, the display substrate provided by the present invention may be an organic light-emitting diode (OLED) display substrate, a quantum light-emitting diode (QLED) display substrate, or a micro LED display substrate.

[0075] Based on the same inventive concept, embodiments of the present invention further provide a display device including the display substrate described above provided by embodiments of the present invention.

[0076] In some embodiments, the display device may be a mobile phone, tablet computer, television, display, notebook computer, digital phone frame, navigator, smartwatch, fitness wristband, personal digital device, assistant, or other product or component with display capabilities. Other necessary components of the display device (e.g., a driver chip) should be understood by those skilled in the art and will not be repeated here, nor should they be considered limitations to the present invention. Furthermore, since the principle of solving the problems of the display device is similar to the principle of solving the problems of the display board described above, an implementation of the display device can be made by referring to the embodiment of the display board described above, and repetition of the description will be omitted.

[0077] Clearly, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the scope of the embodiments of the present invention. In this case, if these changes and transformations of the embodiments of the present invention are included in the claims of the present invention, the present invention is intended to include these changes and transformations as well.

Claims

1. A display board, The device includes a base substrate, at least one annular blocking dam, and a touch metal layer. The base substrate includes a display area and a frame area arranged around the display area. At least one annular blocking dam is positioned around the display area within the frame area, The touch metal layer is located on the side of the layer on which the blocking dam is located that is away from the base substrate, and the touch metal layer includes a plurality of touch electrodes and a plurality of touch signal lines electrically connected to the plurality of touch electrodes, wherein the plurality of touch electrodes are at least partially located in the display area, and the plurality of touch signal lines are located in the frame area, and the plurality of touch signal lines include a plurality of first routing wires and a plurality of second routing wires arranged parallel to a first direction, wherein the orthographic projection of the plurality of first routing wires on the base substrate is located between the orthographic projection of the blocking dam on the base substrate and the display area, and the orthographic projection of the plurality of second routing wires on the base substrate is located on the side of the orthographic projection of the blocking dam on the base substrate that is away from the display area. The system further includes at least one shield wire and a crack detection line positioned on the shield wire side away from the display area, The at least one shield wire is positioned on at least one side of the plurality of first guide wires in a second direction, and / or on at least one side of the plurality of second guide wires in a second direction. The at least one shielded wire is arranged to surround the touch signal line including the first routing wire, and / or the at least one shielded wire is arranged to surround the touch signal line including the second routing wire, The number of the at least one shield wire is two, one of which is located on the side of the first routing wire adjacent to the display area in the second direction, and the other shield wire is located on the side of the second routing wire away from the display area in the second direction. The crack detection line is positioned across the blocking dam in the frame region where the first routing wire is located, and between the blocking dam and the display region in other frame regions, on a display board.

2. The material further comprises an organic insulating layer having a first groove, the first groove being positioned between the orthographic projection of the blocking dam on the base substrate and the orthographic projection of a plurality of the first routing wires on the base substrate. The number N of the plurality of the first routing wires 1 satisfies the formula, and N 1 ≦ (D - d 1 - d 2 ) / (d 3 + d 4 ), the number N of the plurality of the second routing wires 2 satisfies the formula, and N 2 ≧ N - N 1 and D is the shortest distance between the boundary of the display area and the blocking dam, and d 1 d is the shortest distance between the first groove and the first routing wire, 2 is the width of the first groove in the second direction, and d 3 The first routing wire L 1 The width is d 4 The display board according to claim 1, wherein n is the distance between adjacent first routing wires, and N is the total number of the plurality of touch signal lines.

3. The display board according to claim 2, wherein the number of the plurality of first routing wires is 27 or less, and the number of the plurality of second routing wires is 23 or less.

4. The plurality of touch signal lines include a plurality of third and fourth wires arranged parallel to the second direction, The second direction intersects the first direction, The third and first routing wires have a one-to-one correspondence as an integrated structure, and the fourth and second routing wires have a one-to-one correspondence as an integrated structure. The display board according to claim 1, wherein the orthographic projections of the plurality of third routing wires and the plurality of fourth routing wires on the base substrate span the orthographic projection of the blocking dam on the base substrate.

5. The frame region includes a curved region of the blocking dam located away from the display region, The orthographic projection of the second routing wire on the base substrate is located between the orthographic projection of the blocking dam on the base substrate and the bending region. The orthographic projection of the third routing wire on the base substrate is located between the orthographic projection of the corresponding first routing wire on the base substrate and the bending region. The display board according to claim 4, wherein the orthographic projection of the fourth routing wire on the base board is located between the orthographic projection of the corresponding second routing wire on the base board and the orthographic projection of the first routing wire on the base board.

6. The frame region further includes a pad region located on the side of the bending region away from the blocking dam, The plurality of touch signal lines further include a plurality of fifth and sixth wires arranged parallel to the second direction, The plurality of fifth and sixth routing wires are arranged side by side with the second routing wire adjacent to the central axis of the base substrate in the second direction. The fifth routing wire, the third routing wire, and the first routing wire are a one-to-one integrated structure, the fifth routing wire is connected to one end of the first routing wire adjacent to the central axis of the base substrate in the second direction via the third routing wire, and the fifth routing wire extends through the bending region to the pad region. The display board according to claim 5, wherein the sixth routing wire, the fourth routing wire, and the second routing wire are integrally structured in a one-to-one correspondence, the fourth routing wire is connected to the other end of the second routing wire that is away from the central axis of the base substrate in the second direction, the sixth routing wire is connected to one end of the second routing wire that is adjacent to the central axis of the base substrate in the second direction, and the sixth routing wire extends through the bending region to the pad region.

7. In the second direction, one end of the first routing wire, which is away from the central axis of the base substrate, and one end of the fourth routing wire, which is away from the second routing wire, are arranged in the frame region adjacent to the frame region where the plurality of third routing wires are arranged. Furthermore, the display board according to claim 6, wherein the orthographic projection on the base board of one end of the first routing wire, which is away from the central axis of the base board in the second direction, and the orthographic projection on the base board of one end of the fourth routing wire, which is away from the second routing wire, are arranged between the orthographic projection of the blocking dam on the base board and the display area.

8. The plurality of touch signal lines further include a plurality of seventh and a plurality of eighth wires arranged parallel to the second direction, The seventh routing wire and the first routing wire have a one-to-one correspondence and are integrated in structure, and the seventh routing wire is connected to one end of the first routing wire that is away from the central axis of the base substrate in the second direction. The display board according to claim 7, wherein the eighth routing wire and the fourth routing wire have a one-to-one correspondence and an integrated structure, and the eighth routing wire is connected to one end of the fourth routing wire that is separated from the second routing wire.

9. The display board according to claim 1, wherein the plurality of touch signal lines are divided into two groups, and the two groups of touch signal lines are arranged symmetrically with respect to the central axis of the base board in the second direction.

10. The display board according to claim 8, wherein the width of the first wiring wire and the width of the second wiring wire are smaller than the width of the third wiring wire, the width of the fourth wiring wire, the width of the fifth wiring wire, and the width of the sixth wiring wire, and the width of the first wiring wire and the width of the second wiring wire are equal to the width of the seventh wiring wire and the width of the eighth wiring wire.

11. The display substrate according to claim 10, wherein the widths of the first and second wiring wires are 3 μm to 20 μm, the widths of the third, fourth, fifth, and sixth wiring wires are 5 μm to 20 μm, and the widths of the seventh and eighth wiring wires are 3 μm to 20 μm.

12. The display board according to claim 1, wherein the resistance value of the touch signal line is the same.

13. The organic insulating layer further includes a second groove, the second groove being located on the side of the blocking dam away from the display area, The display substrate according to claim 2, wherein the orthographic projection of the second routing wire on the base substrate is located within the second groove.

14. The display substrate according to claim 1, wherein the shortest distance between the orthographic projection of the first routing wire on the base substrate and the orthographic projection of the blocking dam on the base substrate is greater than the shortest distance between the orthographic projection of the second routing wire on the base substrate and the orthographic projection of the blocking dam on the base substrate.

15. The display substrate according to claim 14, wherein the shortest distance between the orthographic projection of the first routing wire on the base substrate and the orthographic projection of the blocking dam on the base substrate is 30 μm to 200 μm, and the shortest distance between the orthographic projection of the second routing wire on the base substrate and the orthographic projection of the blocking dam on the base substrate is 10 μm to 100 μm.

16. The display substrate according to claim 13, wherein in the second direction, the width of the first groove is smaller than the width of the second groove.

17. The system further includes a grounding wire positioned between the shield wire and the crack detection wire, The display board according to claim 1, wherein the routing direction of the grounding wire is the same as the routing direction of the shield wire.

18. The display board according to any one of claims 1 to 17, wherein, in the direction away from one side of the base board, the distance between the first routing wire and the base board is greater than the distance between the second routing wire and the base board.

19. A display device comprising a display board according to any one of claims 1 to 18.

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