Display substrate and display device

Abstract

The present disclosure provides a display substrate and a display device; including a base substrate, the base substrate including: a display area, and a frame area surrounding the display area; at least one circle of blocking dams, arranged around the display area in the frame area; a touch metal layer, located on a side of the layer where the blocking dams are 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 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; the plurality of touch signal lines include: a plurality of first routing lines and a plurality of second routing lines arranged in parallel along a first direction; wherein the orthographic projections of the plurality of first routing lines on the base substrate are located between the orthographic projections of the blocking dams on the base substrate and the display area, and the orthographic projections of the plurality of second routing lines on the base substrate are located on a side of the orthographic projections of the blocking dams on the base substrate away from the display area.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display substrate and a display device. Background Art

[0002] Organic electroluminescent (OLED) display devices are display screens based on organic electroluminescent diodes. They have excellent characteristics such as self-luminescence, high contrast, thin thickness, wide viewing angle, fast response speed, can be used for flexible panels, wide operating temperature range, simple structure and process, etc., and have attracted more and more attention and broad application prospects. In related technologies, the touch function is integrated by embedding the touch structure in the OLED display module to realize the integration of the display function and the touch function of the OLED display device. Summary of the invention

[0003] In one aspect, an embodiment of the present disclosure provides a display substrate, comprising:

[0004] A base substrate, the base substrate comprising: a display area, and a frame area surrounding the display area;

[0005] At least one circle of blocking dams is arranged around the display area in the frame area;

[0006] A 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 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; the plurality of touch signal lines include: a plurality of first routing lines and a plurality of second routing lines arranged in parallel along a first direction; wherein the orthographic projections of the plurality of first routing lines on the base substrate are located between the orthographic projection of the blocking dam on the base substrate and the display area, and the orthographic projections of the plurality of second routing lines on the base substrate are located on a side of the orthographic projection of the blocking dam on the base substrate away from the display area.

[0007] Optionally, in the above-mentioned display substrate provided by the embodiment of the present disclosure, it further includes: an organic insulating layer having a first groove, wherein the first groove is located between the orthographic projection of the blocking dam on the base substrate and the orthographic projection of the plurality of first traces on the base substrate;

[0008] The number N1 of the plurality of first routing lines satisfies the formula: N1≤(D-d1-d2) / (d3+d4), and the number N2 of the plurality of second routing lines satisfies the formula: N2≥N-N1; wherein,

[0009] 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 wiring, d2 is the width of the first groove along the second direction, d3 is the line width of the first wiring L1, d4 is the spacing between adjacent first wirings, and N is the total number of the multiple touch signal lines.

[0010] Optionally, in the above-mentioned display substrate provided by the embodiment of the present disclosure, the number of the plurality of first wirings is less than or equal to 27, and the number of the plurality of second wirings is less than or equal to 23.

[0011] Optionally, in the above-mentioned display substrate provided by the embodiment of the present disclosure, the plurality of touch signal lines further include: a plurality of third lines and a plurality of fourth lines arranged in parallel along the second direction; wherein,

[0012] The second direction is arranged to intersect with the first direction;

[0013] The third routing line corresponds to the first routing line in a one-to-one manner and forms an integrated structure, and the fourth routing line corresponds to the second routing line in a one-to-one manner and forms an integrated structure;

[0014] Orthographic projections of the plurality of third routing lines and the plurality of fourth routing lines on the substrate cross over orthographic projections of the blocking dam on the substrate.

[0015] Optionally, in the above-mentioned display substrate provided by an embodiment of the present disclosure, the frame area includes a bending area located on a side of the barrier dam away from the display area;

[0016] The orthographic projection of the second wiring on the substrate is located between the orthographic projection of the blocking dam on the substrate and the bending area;

[0017] The orthographic projection of the third routing line on the substrate is located between the orthographic projection of the corresponding first routing line on the substrate and the bending area;

[0018] The orthographic projection of the fourth routing line on the substrate is located between the orthographic projection of the second routing line on the substrate and the orthographic projection of the first routing line on the substrate.

[0019] Optionally, in the above-mentioned display substrate provided by the embodiment of the present disclosure, the frame area further includes a pad area located on a side of the bending area away from the blocking dam;

[0020] The plurality of touch signal lines further include: the plurality of fifth lines and the plurality of sixth lines arranged in parallel along the second direction; wherein,

[0021] The plurality of fifth routing lines and the plurality of sixth routing lines are arranged side by side on one side of the second routing line adjacent to the central axis of the substrate in the second direction;

[0022] The fifth routing line, the third routing line and the first routing line are in one-to-one correspondence with each other and form an integrated structure. The fifth routing line is connected to an end of the first routing line adjacent to the central axis of the substrate in the second direction through the third routing line, and the fifth routing line extends to the pad area through the bending area.

[0023] The sixth routing, the fourth routing and the second routing correspond to each other in an integrated structure, the fourth routing is connected to the other end of the second routing away from the central axis of the substrate in the second direction, the sixth routing is connected to one end of the second routing adjacent to the central axis of the substrate in the second direction, and the sixth routing extends to the pad area through the bending area.

[0024] Optionally, in the above-mentioned display substrate provided by the embodiment of the present disclosure, an end of the first routing line away from the central axis of the base substrate in the second direction, and an end of the fourth routing line away from the second routing line are located in the frame area adjacent to the frame area where the plurality of third routing lines are located;

[0025] Furthermore, the orthographic projection of one end of the first routing line away from the central axis of the base substrate in the second direction on the base substrate and the orthographic projection of one end of the fourth routing line away from the second routing line on the base substrate are located between the orthographic projection of the blocking dam on the base substrate and the display area.

[0026] Optionally, in the above-mentioned display substrate provided by the embodiment of the present disclosure, the plurality of touch signal lines further include: a plurality of seventh lines and a plurality of eighth lines arranged in parallel along the second direction; wherein,

[0027] The seventh routing line corresponds to the first routing line in a one-to-one manner and forms an integrated structure, and the seventh routing line is connected to an end of the first routing line away from the central axis of the substrate in the second direction;

[0028] The eighth routing line corresponds to the fourth routing line in a one-to-one manner and forms an integrated structure. The eighth routing line is connected to an end of the fourth routing line away from the second routing line.

[0029] Optionally, in the above-mentioned display substrate provided by an embodiment of the present disclosure, the plurality of touch signal lines are divided into two groups, and the two groups of touch signal lines are symmetrically arranged about a central axis of the base substrate in the second direction.

[0030] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, the line width of the first routing line and the second routing line is smaller than the line width of the third routing line, the fourth routing line, the fifth routing line and the sixth routing line, and the line width of the first routing line and the second routing line is approximately equal to the line width of the seventh routing line and the eighth routing line.

[0031] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, the line width of the first routing line and the second routing line is 3μm-20μm, the line width of the third routing line, the fourth routing line, the fifth routing line and the sixth routing line is 5-20μm, and the line width of the seventh routing line and the eighth routing line is 3μm-20μm.

[0032] Optionally, in the above-mentioned display substrate provided by an embodiment of the present disclosure, the resistance values ​​of the touch signal lines are substantially the same.

[0033] Optionally, in the above display substrate provided by an embodiment of the present disclosure, the organic insulating layer further comprises a second groove, wherein the second groove is located on a side of the blocking dam away from the display area;

[0034] The orthographic projection of the second wiring on the base substrate is located in the second groove.

[0035] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, the shortest distance between the orthographic projection of the first routing line 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 line on the base substrate and the orthographic projection of the blocking dam on the base substrate.

[0036] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, the shortest distance between the orthographic projection of the first wiring on the base substrate and the orthographic projection of the blocking dam on the base substrate is 30μm-200μm, and the shortest distance between the orthographic projection of the second wiring on the base substrate and the orthographic projection of the blocking dam on the base substrate is 10μm-100μm.

[0037] Optionally, in the above-mentioned display substrate provided by an embodiment of the present disclosure, in the second direction, the width of the first groove is smaller than the width of the second groove.

[0038] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, it further includes: at least one shielding line;

[0039] The at least one shielding line is located on at least one side of the plurality of first routing lines in the second direction, and / or is located on at least one side of the plurality of second routing lines in the second direction.

[0040] Optionally, in the above-mentioned display substrate provided by the embodiment of the present disclosure, the at least one shielding line is arranged around the touch signal line including the first wiring, and / or the at least one shielding line is arranged around the touch signal line including the second wiring.

[0041] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, it further includes: a crack detection line located at a side of the shielding line away from the display area;

[0042] The crack detection line crosses the blocking dam in the frame area where the first line is located, and is located between the blocking dam and the display area in other frame areas.

[0043] Optionally, the display substrate provided in the embodiment of the present disclosure further includes: a grounding line located between the shielding line and the crack detection line, and the direction of the grounding line is substantially the same as the direction of the shielding line.

[0044] Optionally, in the above-mentioned display substrate provided in an embodiment of the present disclosure, in a direction away from one side of the base substrate, a distance between the first routing line and the base substrate is greater than a distance between the second routing line and the base substrate.

[0045] On the other hand, an embodiment of the present disclosure further provides a display device, comprising the above-mentioned display substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A schematic diagram of a planar structure of a display substrate provided in an embodiment of the present disclosure;

[0047] Figure 2 for Figure 1 A schematic diagram of an enlarged structure of the N region;

[0048] Figure 3 for Figure 1 Another enlarged structural diagram of the middle N region;

[0049] Figure 4 For along Figure 3 Schematic diagram of the cross-sectional structure along line I-II;

[0050] Figure 5 For along Figure 3 Schematic diagram of the cross-sectional structure along line III-IV;

[0051] Figure 6 for Figure 1 Schematic diagram of the enlarged structure of the middle M region;

[0052] Figure 7 A schematic diagram of another planar structure of a display substrate provided in an embodiment of the present disclosure;

[0053] Figure 8 A schematic diagram of another planar structure of a display substrate provided in an embodiment of the present disclosure;

[0054] Fig. 9 A schematic diagram of another planar structure of a display substrate provided in an embodiment of the present disclosure;

[0055] Fig.10 A schematic diagram of another planar structure of a display substrate provided in an embodiment of the present disclosure;

[0056] Fig.11 A schematic diagram of another planar structure of a display substrate provided in an embodiment of the present disclosure;

[0057] Fig.12 A schematic diagram of another planar structure of a display substrate provided in an embodiment of the present disclosure;

[0058] Fig.13 A schematic diagram of another planar structure of a display substrate provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. It should be noted that the size and shape of the figures in the drawings do not reflect the actual proportions, and the purpose is only to illustrate the contents of the present disclosure. And the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0060] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present disclosure belongs. The words "first", "second" and similar terms used in the present disclosure specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Inside", "outside", "upper", "lower" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0061] At present, the market has put forward higher and higher requirements for thinner display screens (such as mobile phones), and the Flexible Multi-Layer On Cell (FMLOC) technology has emerged. The FMLOC process is to make a metal grid electrode layer on the packaging layer of the display module to realize the touch function, so there is no need for an external touch control structure (TSP), which can reduce the thickness of the screen.

[0062] The FMLOC process is mostly made of two layers of metal, one is the metal mesh layer (Metal Mesh, MM), and the other is the bridge metal layer (Bridge Metal, BM). The metal mesh is located in the display area, and the metal mesh can be divided into a touch drive (Tx) metal mesh and a touch sensing (Rx) metal mesh according to the horizontal and vertical directions, wherein one of the Rx metal mesh and the Tx metal mesh is connected to each other, and the other is connected through a bridge metal layer. In addition, the FMLOC product is also provided with a barrier dam and multiple touch signal lines (traces) located in the border area; wherein the barrier dam is arranged around the display area to prevent external water vapor or oxygen from entering the display area; multiple touch signal lines are arranged between the barrier dam and the display area, and are electrically connected to the Tx metal mesh and the Rx metal mesh respectively. However, with the development of the market, more stringent requirements are put forward for the border of the product, especially the lower border. The above design of placing all traces between the barrier dam and the display area greatly limits the narrowing of the border.

[0063] In view of the above problems existing in the related art, the present disclosure provides a display substrate, such as Figure 1 and Figure 2 As shown, including:

[0064] A base substrate 101, the base substrate 101 comprises: a display area AA, and a frame area BB surrounding the display area AA;

[0065] At least one circle of barrier dams 102 is arranged in the frame area BB and around the display area AA;

[0066] The touch metal layer MM is located on the side of the layer where the blocking dam 102 is located away from the base substrate 101; the touch metal layer MM includes multiple touch electrodes Tx / Rx and multiple touch signal lines 103 electrically connected to the multiple touch electrodes Tx / Rx, wherein the multiple touch electrodes Tx / Rx are at least partially located in the display area AA, and the multiple touch signal lines 103 are located in the frame area BB; the multiple touch signal lines 103 may include: multiple first wirings L1 and multiple second wirings L2 arranged in parallel along the first direction X; wherein the orthographic projections of the multiple first wirings L1 on the base substrate 101 are located between the orthographic projections of the blocking dam 102 on the base substrate 101 and the display area AA, and the orthographic projections of the multiple second wirings L2 on the base substrate 101 are located on the side of the orthographic projection of the blocking dam 102 on the base substrate 101 away from the display area AA.

[0067] In the above-mentioned display substrate provided in the embodiment of the present disclosure, by placing multiple first lines L1 in the border area BB inside the blocking dam 102, and by placing multiple second lines L2 arranged parallel to the first lines L1 in the border area BB outside the blocking dam 102, the space outside the blocking dam 102 can be reasonably utilized, thereby effectively reducing the width of the border area BB inside the blocking dam 102, which is conducive to achieving product requirements for narrower border designs.

[0068] It should be noted that Figure 1 The following description is made by taking the multiple first lines L1 and multiple second lines L2 contained in the lower frame area BB and arranged in parallel and separated on the inner and outer sides of the barrier dam 102 as an example. In a specific implementation, in the left frame area BB, the right frame area BB and / or the upper frame area BB, in order to reduce the wiring space between the barrier dam 102 and the display area AA, it is also possible to consider dividing the touch signal line 103 into two and respectively arrange them on the inner and outer sides of the barrier dam 102.

[0069] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, if Figure 1 and Figure 2As shown, an organic insulating layer 104 having a first groove H1 may also be included. The first groove H1 is used to prevent water and oxygen from invading the display area AA. Specifically, the first groove H1 may be located between the orthographic projection of the blocking dam 102 on the base substrate 101 and the orthographic projection of the first wiring L1 on the base substrate 101, and is in contact with the blocking dam 102, and the shortest distance between the first wiring L1 and the first wiring L1 is d1. In some embodiments, the display area AA to the groove H1 may be set as an inclined surface according to actual needs. Here, the shortest distance d1 of the first groove H1 is the shortest distance on a plane parallel to the base substrate, that is, the shortest distance d1 of the first groove H1 does not include the inclined surface between the display area AA and the groove H1. In other words, when the display area AA to the groove H1 is an inclined surface, at least part of the plurality of first wirings may be set on the inclined surface. In some embodiments, the number N1 of the plurality of first lines L1 satisfies the formula: N1≤(D-d1-d2) / (d3+d4); wherein D represents the shortest distance between the boundary of the display area AA (i.e., the boundary line between the display area AA and the frame area BB where the first groove H1 is located) and the barrier dam 102, d2 represents the width of the first groove H1 along the second direction Y, d3 represents the line width of the first line L1, and d4 represents the spacing of the first line L1. The number N2 of the plurality of second lines L2 satisfies the formula: N2≥N-N1; wherein N is the total number of all touch signal lines 103 electrically connected to the Tx metal grid and the Rx metal grid. Exemplarily, the number of the plurality of first lines L1 is less than or equal to 27, and the number of the plurality of second lines L2 is less than or equal to 23. Optionally, N1=(D-d1-d2) / (d3+d4) and N2=N-N1. In this case, the border area BB of the display panel is the narrowest and will not interfere with the normal display of the display area AA.

[0070] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, if Figure 2 As shown, the multiple touch signal lines 103 may also include: multiple third lines L3 and multiple fourth lines L4 arranged in parallel along the second direction Y; wherein the second direction Y is arranged to cross the first direction X; the third lines L3 and the first lines L1 correspond one-to-one to form an integrated structure, and the fourth lines L4 and the second lines L2 correspond one-to-one to form an integrated structure; the orthographic projections of the multiple third lines L3 and the multiple fourth lines L4 on the substrate 101 cross the orthographic projections of the blocking dam 102 on the substrate 101.

[0071] By setting a plurality of third lines L3 and a plurality of fourth lines L4 across the barrier dam 102, on the one hand, the first line L1 inside the barrier dam 102 can be led out to the outside of the barrier dam 102, which is conducive to connecting the touch signal line 103 with the external drive circuit. In some embodiments, the external drive circuit can be an electrical connection of a flexible printed circuit board (Flexible Print Circuit Board, FPC). On the other hand, the second line L2 outside the barrier dam 102 can be led out to the inside of the barrier dam 102, which is conducive to the electrical connection of the touch signal line 103 with the Tx or Rx metal grid in the display area AA; and the setting method of the second line L2 can reasonably utilize the space outside the barrier dam 102, thereby reducing the width of the frame area BB inside the barrier dam 102, and realizing a further narrowing design of the frame area BB.

[0072] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, in order to achieve the technical effect of narrow frame, as Figure 2 As shown, a bending area BA may also be provided on the side of the barrier dam 102 away from the display area AA. In this case, the orthographic projection of the second line L2 on the base substrate 101 may be located between the orthographic projection of the barrier dam 102 on the base substrate 101 and the bending area BA; the orthographic projection of the third line L3 on the base substrate 101 may be located between the orthographic projection of the corresponding first line L1 on the base substrate 101 and the bending area BA; the orthographic projection of the fourth line L4 on the base substrate 101 may be located between the orthographic projection of the corresponding second line L2 on the base substrate 101 and the orthographic projection of the first line L1 on the base substrate 101; in other words, the third line L3 extends from the first line L1 of the integrated design to the bending area BA, and the fourth line L4 extends from the second line L2 of the integrated design to the inner side of the barrier dam 102.

[0073] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, if Figure 2As shown, the border area BB may also include a pad area PA located on the side of the bending area BA away from the blocking dam 102; the plurality of touch signal lines 103 may also include: a plurality of fifth routing lines L5 and a plurality of sixth routing lines L6 arranged in parallel along the second direction Y; wherein the plurality of fifth routing lines L5 and the plurality of sixth routing lines L6 are arranged side by side on one side of the second routing line L2 adjacent to the central axis of the substrate 101 in the second direction Y; the fifth routing line L5, the third routing line L3 and the first routing line L1 are in one-to-one correspondence with each other as an integrated structure, and the fifth routing line L5 is connected to the third routing line L3 through the third routing line L3. A routing line L1 is connected to one end of the central axis of the substrate 101 in the second direction Y, and the fifth routing line L5 extends to the pad area PA through the bending area BA; the sixth routing line L6, the fourth routing line L4 and the second routing line L2 correspond to each other as an integrated structure, the fourth routing line L4 is connected to the other end of the second routing line L2 away from the central axis of the substrate 101 in the second direction Y, the sixth routing line L6 is connected to one end of the second routing line L2 adjacent to the central axis of the substrate in the second direction Y, and the sixth routing line L6 extends to the pad area PA through the bending area BA.

[0074] In some embodiments, the pad area PA has a plurality of contact pads (or pads, Pads), each of which is configured to be electrically connected to a fifth line L5 or a sixth line L6. The contact pads may be exposed on the surface of the pad area PA, i.e., not covered by any layer, so as to facilitate electrical connection to the flexible printed circuit board. The flexible printed circuit board is electrically connected to the external controller and is configured to transmit a signal or power from the external controller to the fifth line L5 and the sixth line L6.

[0075] In some embodiments, the wiring method of the common (Com) signal line, power (VDD / VSS) line, ground (GND) line, etc. wired in the border area BB can also adopt the wiring method of the above-mentioned touch signal line 103. Figures 3 to 5 As shown, the touch signal line 103 may include: a first portion 103a disposed in the same layer as the metal mesh layer MM, and a second portion 103b disposed in the same layer as the bridge metal layer BM and electrically connected to the first portion 103a.

[0076] By setting the touch signal line 103 as a double-layer wiring including a first part 103a and a second part 103b, after one layer of wiring is partially broken, the touch signal can still be loaded to the metal mesh layer MM through the other layer of wiring, thereby effectively solving the problem that the single-layer wiring breakage easily leads to touch failure; in addition, compared with the design of a single-layer wiring, the double-layer wiring can also reduce the resistance value of the touch signal line 103. In a specific implementation, the first part 103a and the second part 103b are electrically connected through a via hole penetrating the inorganic insulating layer 105.

[0077] In some embodiments, Figure 4 As shown, in order to make the bending stress of the bending area BA uniform, the fifth routing line L5 and the sixth routing line L6 contained in the touch signal line 103 can be routed from the metal grid layer MM and the bridge metal layer BM to the second source and drain metal layer 106 (SD2) in the bending area BA, and then return to the metal grid layer MM and the bridge metal layer BM in the pad area PA for routing.

[0078] It should be noted that in the present disclosure, not only the mutual capacitance method of the above-mentioned metal grid technology can be used to realize the touch function, but also the self-capacitance method can be used to realize the touch function. And when the self-capacitance method is used, the display substrate can include a plurality of self-capacitance electrodes arranged in a different layer from the plurality of touch lines, the inorganic insulating layer 105 is located between the layer where the plurality of touch lines are located and the layer where the plurality of self-capacitance electrodes are located, and each touch line is electrically connected to a self-capacitance electrode through a via penetrating the inorganic insulating layer 105.

[0079] In addition, the display side of the display substrate can usually be regarded as the front side by default, and the side opposite to the display side is the back side. The bending of the bending area BA makes the pad area PA located on the side of the bending area BA away from the display area DA all on the back side of the display substrate, which can improve the space utilization and reduce the area occupied by the frame area BB.

[0080] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, if Figure 2 As shown, one end of the first routing line L1 away from the central axis of the base substrate 101 in the second direction Y, and one end of the fourth routing line L4 away from the second routing line L2, are located in the adjacent frame area of ​​the frame area where the plurality of third routing lines L3 are located; and the orthographic projection of one end of the first routing line L1 away from the central axis of the base substrate 101 in the second direction Y, and the orthographic projection of one end of the fourth routing line L4 away from the second routing line L2 on the base substrate 101, are located between the orthographic projection of the blocking dam 102 on the base substrate 101 and the display area AA.

[0081] As can be seen from the above description, in the present disclosure, the touch signal line 103 including the first line L1, the third line L3 and the fifth line L5 first folds from the right frame area BB to the lower frame area BB, then crosses the blocking dam 102, and then extends to the pad area PA through the bending area BA to be electrically connected to the flexible printed circuit board; and the touch signal line 103 including the second line L2, the fourth line L4 and the sixth line L6 first crosses the blocking dam 102 from the right frame area BB, then folds to the lower frame area BB, and then extends to the pad area PA through the bending area BA to be electrically connected to the flexible printed circuit board. This arrangement, on the one hand, ensures that the touch signal lines 103 do not overlap with each other to avoid short circuit defects; on the other hand, ensures that the winding of each touch signal line 103 is short to avoid signal delay (RCdelay). Furthermore, the arrangement of the second trace L2 can reasonably utilize the space outside the barrier dam 102 , thereby reducing the width of the frame area BB inside the barrier dam 102 , thereby achieving a further narrowing design of the frame area BB.

[0082] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, if Figure 2 As shown, the multiple touch signal lines 103 may also include: a plurality of seventh lines L7 and a plurality of eighth lines L8 arranged in parallel along the second direction Y; wherein the seventh line L7 corresponds one-to-one with the first line L1 to form an integrated structure, and the seventh line L7 is connected to an end of the first line L1 away from the central axis of the base substrate 101 in the second direction Y; the eighth line L8 corresponds one-to-one with the fourth line L4 to form an integrated structure, and the eighth line L8 is connected to an end of the fourth line L4 away from the second line L2.

[0083] Since the end of the first line L1 away from the central axis of the base substrate 101 in the second direction Y is located in the adjacent frame area where the plurality of third lines L3 are located, the seventh line L7 can extend in the adjacent frame area along the second direction Y. In addition, since the end of the fourth line L4 away from the second line L2 is located in the adjacent frame area where the plurality of third lines L3 are located, the eighth line L8 can also extend in the adjacent frame area along the second direction Y. This arrangement minimizes the wiring length of the touch signal line 103, thereby making the resistance value of the touch signal line 103 smaller and avoiding the upper signal delay of the touch signal line 103.

[0084] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, if Figure 1As shown, the plurality of touch signal lines 103 can be divided into two groups, and the two groups of touch signal lines 103 are symmetrically arranged about the central axis EF of the substrate 101 in the second direction Y. Specifically, the wiring method of the touch signal lines 103 on both sides inside and outside the barrier dam is the same on both sides of the central axis EF of the substrate 101 in the second direction Y, but 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 can be the same or different. This arrangement facilitates balanced wiring, improves process stability, and realizes a further narrowing design of the border area.

[0085] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, in order to ensure that the resistance values ​​of each touch signal line 103 are approximately the same, the line width of the first routing line L1 and the second routing line L2 can be set to be smaller than the line width of the third routing line L3, the fourth routing line L4, the fifth routing line L5, and the sixth routing line L6, and the line width of the first routing line L1 and the second routing line L2 is approximately equal to the line width of the seventh routing line L7 and the eighth routing line L8.

[0086] It should be noted that, in specific implementations, due to limitations of process conditions or the influence of other factors such as measurement, the above-mentioned “approximately” may be completely identical or may have some deviations. Therefore, as long as the “approximately” relationship between the above-mentioned features satisfies the allowable error (for example, a fluctuation of 10% up and down), it belongs to the protection scope of the present disclosure.

[0087] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, the line width of the first line L1 and the second line L2 can be 3μm-20μm, for example, 7.3μm; the line width of the third line L3, the fourth line L4, the fifth line L5, and the sixth line L6 can be 5μm-20μm, for example, 9.2μm; the line width of the seventh line L7 and the eighth line L8 can be 3μm-20μm, for example, 7.2μm.

[0088] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, if Figure 3 and Figure 5 As shown, it may also include: an organic insulating layer 104, in which a first groove H1 and a second groove H2 are provided, wherein the first groove H1 is located between the blocking dam 102 and the display area AA, and 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 wiring L1 on the base substrate 101 is located between the first groove H1 and the display area AA, and the orthographic projection of the second wiring L2 on the base substrate 101 is located in the second groove H2.

[0089] In some embodiments, the first groove H1 is used to isolate the organic insulating layer 104 to prevent water and oxygen from invading the display area AA; the second groove H2 is used to release bending stress. By setting the first routing line L1 on the inner side of the blocking dam 102 between the first groove H1 and the display area AA, the first routing line L1 on the inner side of the blocking dam 102 is prevented from overlapping with the first groove H1, so that the influence of the first groove H1 on the existing routing method can be avoided. Because there is no organic encapsulation layer 109 (IJP) at the second groove H2, and the structure of the organic insulating layer 104 under the touch signal line 103 is simple, which is basically a large-area excavation design, so that the film layer step difference is very small, that is, the film layer has good flatness, so by setting the second routing line L2 on the outer side of the blocking dam 102 in the second groove H2, there are great advantages in the design and process implementation of the touch signal line 103.

[0090] Optionally, in the display substrate provided by the embodiment of the present disclosure, in the direction away from the side of the base substrate, the distance between the first line L1 and the base substrate 101 is greater than the distance between the second line L2 and the base substrate 101. Specifically, Figure 5 As shown, there are more film layers under the first line L1 on the inner side of the blocking dam 102, which are, from bottom to top, 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 etch barrier layer 111 (BFL2); while there are fewer film layers under the second line L2 on the outer side of the blocking dam 102, which are, from bottom to top, 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 etch barrier layer 111; in some embodiments, the line widths of the first line L1 and the second line L2 on both sides of the blocking dam 102 are ensured to be substantially the same. Optionally, the first inorganic encapsulation layer 108, the organic encapsulation layer 109, and the second inorganic encapsulation layer 110 constitute a thin film encapsulation layer (EPL).

[0091] like Figure 4 and Figure 5As shown, in some embodiments, the organic insulating layer 104 may include a first planar layer 1041 (PLN1), a second planar layer 1042, and a pixel defining 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; wherein the stacking pattern of the first blocking dam 1021 is located in the second planar layer 1042 and the pixel defining layer 1043, and the stacking pattern of the second blocking dam 1022 is located in the first planar layer 1041, the second planar layer 1042, and the pixel defining layer 1043. Since the first blocking dam 1021 lacks the film layer pattern located in the first planar layer 1041 compared with the second blocking dam 1022, the height of the first blocking dam 1021 relative to the base substrate 101 is lower than the height of the second blocking dam 1022 relative to the base substrate 101, thereby lengthening the path for external water vapor and oxygen to enter the display area AA, increasing the difficulty of entering the display area AA, and further improving the blocking ability of the blocking dam 102. In some embodiments, the width of the first barrier dam 1021, the width of the second barrier dam 1022, and the distance between the first barrier dam 1021 and the second barrier dam 1022 may be substantially the same, for example, 30 μm. The cross-sectional shape of the first barrier dam 1021 and the second barrier dam 1022 may be Figure 4 The rectangle shown can also be Figure 5 In the trapezoidal shape shown, at least one side of the first barrier dam 1021 and the second barrier dam 1022 close to the display area AA is an inclined surface, which is not limited here.

[0092] In some embodiments, to increase the adhesion of the third and fourth lines L3 and L4 crossing the barrier dam 102 , the line widths of the third and fourth lines L3 and L4 at the gaps between the first and second barrier dams 1021 and 1022 may be narrowed.

[0093] It should be noted that, in the present disclosure, “the inner side of the barrier dam 102 ” specifically refers to the side of the first barrier dam 1021 close to the display area AA, and “the outer side of the barrier dam 102 ” specifically refers to the side of the second barrier dam 1022 away from the display area AA.

[0094] In addition, if Figure 4 As shown, the display substrate may further include: an interlayer dielectric layer 112 (ILD), a gate insulating layer 113 (GI), a first etch barrier layer 114 (BFL1), a buffer layer 115 (BRL) and a spacer layer 116 (PS). It should be understood that other essential components of the display substrate are well understood by those skilled in the art, and are not described in detail herein, nor should they be used as a limitation to the present disclosure.

[0095] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, if Figure 3As shown, the shortest distance d5 between the orthographic projection of the first line L1 on the base substrate 101 and the orthographic projection of the barrier dam 102 on the base substrate 101 is greater than the shortest distance d6 between the orthographic projection of the second line L2 on the base substrate 101 and the orthographic projection of the barrier dam 102 on the base substrate 101. In this way, the first line L1 inside the barrier dam 102 can avoid the first groove H1, so that the first line L1 inside the barrier dam 102 and the first groove H1 do not overlap each other.

[0096] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, the shortest distance d5 between the orthographic projection of the first line L1 on the base substrate 101 and the orthographic projection of the blocking dam 102 on the base substrate 101 can be 30μm-200μm, for example 48.9μm; the shortest distance d6 between the orthographic projection of the second line L2 on the base substrate 101 and the orthographic projection of the blocking dam 102 on the base substrate 101 can be 10μm-100μm, for example 29.4μm.

[0097] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, in order to achieve the technical effect of narrow frame, as Figure 3 As shown, in the second direction Y, 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. For example, 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 greater than or equal to 70 μm. Figure 6 As shown, a floating line 117 (dummy) extending along the first direction X can be set between the blocking dam 102 and the first wiring L1 inside it, and the boundary of the floating line 117 and the first groove H1 does not overlap each other, that is, the floating line 117 can be set between the first groove H1 and the first wiring L1, or inside the first groove H1.

[0098] Before setting the floating line 117, the area between the blocking dam 102 and the first wiring L1 inside it is a blank area. By setting the floating line 117 in the blank area, the wiring of the blank area can be closer to the surrounding wiring area structure, thereby improving the process stability and product stability.

[0099] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, if Figures 7 to 11 As shown, in order to shield interference, it can also include: at least one shielding line 118 (Guard); the at least one shielding line 118 can be located on at least one side of the multiple first lines L1 in the second direction Y, and / or, located on at least one side of the multiple second lines L2 in the second direction Y.

[0100] In some embodiments, Figure 7 As shown, at least one shielding line 118 may be disposed around the touch signal line 103 including the first trace L1; in some embodiments, as Figure 8 As shown, at least one shielding line 118 may be disposed around the touch signal line 103 including the second trace L2; in some embodiments, the number of at least one shielding line 118 is multiple. Fig. 9 As shown, a plurality of shielding lines 118 may be disposed around the touch signal line 103 including the first line L1 and the touch signal line 103 including the second line L2. Fig.10 As shown, in at least one group of touch signal lines, the number of at least one shielding line 118 is two, one of which is arranged on the side of the first line L1 adjacent to the display area AA in the second direction Y, and the other shielding line 118 is arranged on the side of the second line L2 away from the display area AA in the second direction Y. In other embodiments, such as Fig.11 As shown, shielding lines 118 may be further provided on both sides of the plurality of first wirings L1 in the second direction Y, and on both sides of the plurality of second wirings L2 in the second direction Y, respectively.

[0101] In specific implementation, in order to achieve a better shielding effect, the shielding line 118 may be loaded with DC signals such as the first power signal Vdd, the second power signal Vss, and the initialization signal Vinit. In order to reduce the number of film layers, the shielding line 118 and the touch signal line 103 may be arranged in the same layer.

[0102] Optionally, in the above-mentioned display substrate provided by the embodiment of the present disclosure, the sum of the shortest distance from each shielding line 118 to each touch signal line 103 and the line width of a single shielding line 118 may be greater than 30 μm, so as to better isolate the mutual interference of different signals (such as Tx signal and Rx signal) on the touch signal lines 103 on both sides of the shielding line 118. In some embodiments, when the signals on the touch signal lines 103 on both sides of the shielding line 118 are the same, there is no need to specifically limit the sum of the shortest distance from each shielding line 118 to each touch signal line 103 and the line width of a single shielding line 118. In some embodiments, the line width of a single shielding line 118 may be about 9.2 μm.

[0103] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, if Fig.12 As shown, it may also include: a crack detection line 119 (PCD) located on the side of the shielding line 118 away from the display area AA; the crack detection line 119 crosses the blocking dam 102 in the frame area BB where the first line L1 is located, and is located between the blocking dam 102 and the display area AA in other frame areas BB.

[0104] The entire PCD winding is arranged on the backplane end and the touch panel end. In some embodiments, the crack detection line 119 has two loops, one on the left and one on the right. One end of the crack detection line 119 is connected to the data line corresponding to the green sub-pixel in the panel detection (Cell Test) unit, and the other end is connected to the high level (VGH) signal, which is provided by the flexible printed circuit board. In the case of no cracks, the data line gives a high voltage, which is input to the green sub-pixel of the corresponding column, so that the current flowing through the light-emitting device (such as OLED) of the green sub-pixel is relatively small, and the light-emitting device hardly emits light and presents a black state; in the case of cracks, it can be considered that the detection voltage signal at this time is approximately 0V, and the 0V voltage is input to the green sub-pixel of the corresponding column, so that the current flowing through the light-emitting device of the green sub-pixel of the column is relatively large, causing the light-emitting device to emit light, and a green bright line appears under the black screen. In addition, in order to reduce the number of film layers, the crack detection line 119 can be set to the same layer as the touch signal line 103.

[0105] Optionally, in the above-mentioned display substrate provided in the embodiment of the present disclosure, if Fig.13 As shown, it may also include: a grounding line 120 (GND) located between the shielding line 118 and the crack detection line 119, and the direction of the grounding line 120 is substantially the same as the direction of the shielding line 118. In a specific implementation, the grounding line 120 is grounded and does not load any signal. In addition, in order to reduce the number of film layers, the grounding line 120 can be set in the same layer as the touch signal line 103.

[0106] In some embodiments, the display substrate provided by the present disclosure may be an organic electroluminescent display substrate (OLED), a quantum dot light-emitting display substrate (QLED), or a micro light-emitting diode display substrate (Micro LED), etc.

[0107] Based on the same inventive concept, an embodiment of the present disclosure further provides a display device, including the above-mentioned display substrate provided by an embodiment of the present disclosure.

[0108] In some embodiments, the display device can be: a mobile phone, a tablet computer, a television, a display, a laptop computer, a digital photo frame, a navigator, a smart watch, a fitness wristband, a personal digital assistant, or any other product or component with a display function. Other essential components of the display device (such as a driver chip) should be understood by those of ordinary skill in the art, and will not be described in detail here, nor should they be used as limitations on the present disclosure. In addition, since the principle of solving the problem by the display device is similar to the principle of solving the problem by the above-mentioned display panel, the implementation of the display device can refer to the embodiment of the above-mentioned display panel, and the repeated parts will not be described in detail.

[0109] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present disclosure without departing from the spirit and scope of the embodiments of the present disclosure. Thus, if these modifications and variations of the embodiments of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is also intended to include these modifications and variations.

Claims

1. A display substrate, wherein: include: A base substrate, the base substrate comprising: a display area, and a frame area surrounding the display area; At least one circle of blocking dams is arranged around the display area in the frame area; a touch metal layer, located on a side of the layer where the blocking dam is located away from the base substrate; the touch metal layer comprises 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; the plurality of touch signal lines comprise: a plurality of first routing lines and a plurality of second routing lines arranged in parallel along a first direction; wherein the orthographic projections of the plurality of first routing lines on the base substrate are located between the orthographic projections of the blocking dam on the base substrate and the display area, and the orthographic projections of the plurality of second routing lines on the base substrate are located on a side of the orthographic projection of the blocking dam on the base substrate away from the display area; The touch electrode includes a touch driving metal grid and a touch sensing metal grid, and the display substrate further includes a bridging metal layer, one of the touch sensing metal grid and the touch driving metal grid is connected to each other, and the other is connected through the bridging metal layer; The plurality of touch signal lines further include: a plurality of third lines and a plurality of fourth lines arranged in parallel along the second direction; The second direction is arranged to intersect with the first direction; The third routing line corresponds to the first routing line in a one-to-one manner and forms an integrated structure, and the fourth routing line corresponds to the second routing line in a one-to-one manner and forms an integrated structure; The orthographic projections of the plurality of third routing lines and the plurality of fourth routing lines on the substrate cross the orthographic projection of the blocking dam on the substrate; Wherein, the frame area includes a bending area located on a side of the blocking dam away from the display area; The orthographic projection of the second wiring on the substrate is located between the orthographic projection of the blocking dam on the substrate and the bending area; The orthographic projection of the third routing line on the substrate is located between the orthographic projection of the corresponding first routing line on the substrate and the bending area; The orthographic projection of the fourth routing line on the substrate is located between the orthographic projection of the second routing line on the substrate and the orthographic projection of the first routing line on the substrate.

2. The display substrate according to claim 1, wherein: Also includes: An organic insulating layer having a first groove, wherein the first groove is located between an orthographic projection of the blocking dam on the base substrate and an orthographic projection of the plurality of first wirings on the base substrate; The number N1 of the plurality of first routing lines satisfies the formula: N1≤(D-d1-d2) / (d3+d4), and the number N2 of the plurality of second routing lines satisfies the formula: N2≥N-N1; wherein, 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 wiring, d2 is the width of the first groove along the second direction, d3 is the line width of the first wiring, d4 is the spacing between adjacent first wirings, and N is the total number of the multiple touch signal lines.

3. The display substrate according to claim 2, wherein: The number of the plurality of first routing lines is less than or equal to 27, and the number of the plurality of second routing lines is less than or equal to 23.

4. The display substrate according to claim 1, wherein: The border area also includes a pad area located on a side of the bending area away from the blocking dam; The plurality of touch signal lines further include: a plurality of fifth lines and a plurality of sixth lines arranged in parallel along the second direction; wherein, The plurality of fifth routing lines and the plurality of sixth routing lines are arranged side by side on one side of the second routing line adjacent to the central axis of the substrate in the second direction; The fifth routing line, the third routing line and the first routing line are in one-to-one correspondence with each other and form an integrated structure. The fifth routing line is connected to an end of the first routing line adjacent to the central axis of the substrate in the second direction through the third routing line, and the fifth routing line extends to the pad area through the bending area. The sixth routing, the fourth routing and the second routing correspond to each other in an integrated structure, the fourth routing is connected to the other end of the second routing away from the central axis of the substrate in the second direction, the sixth routing is connected to one end of the second routing adjacent to the central axis of the substrate in the second direction, and the sixth routing extends to the pad area through the bending area.

5. The display substrate according to claim 4, wherein: An end of the first routing line away from the central axis of the substrate in the second direction and an end of the fourth routing line away from the second routing line are located in the border area adjacent to the border area where the plurality of third routing lines are located; Furthermore, the orthographic projection of one end of the first routing line away from the central axis of the base substrate in the second direction on the base substrate and the orthographic projection of one end of the fourth routing line away from the second routing line on the base substrate are located between the orthographic projection of the blocking dam on the base substrate and the display area.

6. The display substrate according to claim 5, wherein: The plurality of touch signal lines further include: a plurality of seventh lines and a plurality of eighth lines arranged in parallel along the second direction; wherein, The seventh routing line corresponds to the first routing line in a one-to-one manner and forms an integrated structure, and the seventh routing line is connected to an end of the first routing line away from the central axis of the substrate in the second direction; The eighth routing line corresponds to the fourth routing line in a one-to-one manner and forms an integrated structure. The eighth routing line is connected to an end of the fourth routing line away from the second routing line.

7. The display substrate 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 symmetrically arranged about a central axis of the base substrate in the second direction.

8. The display substrate according to claim 6, wherein: The line widths of the first routing and the second routing are smaller than the line widths of the third routing, the fourth routing, the fifth routing, and the sixth routing, and the line widths of the first routing and the second routing are greater than or equal to 90% of the line widths of the seventh routing and the eighth routing, and less than or equal to 110% of the line widths of the seventh routing and the eighth routing.

9. The display substrate according to claim 8, wherein: The line widths of the first and second routings are 3 μm-20 μm, the line widths of the third, fourth, fifth and sixth routings are 5 μm-20 μm, and the line widths of the seventh and eighth routings are 3 μm-20 μm.

10. The display substrate according to claim 1, wherein: The ratio of the resistance values ​​of any two touch signal lines is greater than or equal to 90% and less than or equal to 110%.

11. The display substrate according to claim 2, wherein: The organic insulating layer further comprises a second groove, and the second groove is located at a side of the blocking dam away from the display area; The orthographic projection of the second wiring on the base substrate is located in the second groove.

12. The display substrate according to claim 1, wherein: The shortest distance between the orthographic projection of the first line on the substrate and the orthographic projection of the blocking dam on the substrate is greater than the shortest distance between the orthographic projection of the second line on the substrate and the orthographic projection of the blocking dam on the substrate.

13. The display substrate according to claim 12, wherein: The shortest distance between the orthographic projection of the first line on the substrate and the orthographic projection of the blocking dam on the substrate is 30 μm-200 μm, and the shortest distance between the orthographic projection of the second line on the substrate and the orthographic projection of the blocking dam on the substrate is 10 μm-100 μm.

14. The display substrate according to claim 11, wherein: In the second direction, a width of the first groove is smaller than a width of the second groove.

15. The display substrate according to claim 1, wherein: Also includes: At least one shielded wire; The at least one shielding line is located on at least one side of the plurality of first routing lines in the second direction, and / or is located on at least one side of the plurality of second routing lines in the second direction.

16. The display substrate according to claim 15, wherein: The at least one shielding line is disposed around the touch signal line including the first wiring, and / or the at least one shielding line is disposed around the touch signal line including the second wiring.

17. The display substrate according to claim 16, wherein: The number of the at least one shielding line is two, one of which is arranged on a side of the first line adjacent to the display area in the second direction, and the other shielding line is arranged on a side of the second line away from the display area in the second direction.

18. The display substrate according to claim 17, wherein: Also includes: a crack detection line located on a side of the shielding line away from the display area; The crack detection line crosses the blocking dam in the frame area where the first line is located, and is located between the blocking dam and the display area in other frame areas.

19. The display substrate according to claim 18, wherein: Also includes: A grounding wire is located between the shielding wire and the crack detection wire, and the direction of the grounding wire is the same as that of the shielding wire.

20. The display substrate according to any one of claims 1 to 19, wherein: In a direction away from one side of the substrate, a distance between the first wiring and the substrate is greater than a distance between the second wiring and the substrate.

21. A display device, wherein: Comprising the display substrate as described in any one of claims 1-20.

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