Touch substrate, display touch panel and display device

Abstract

This disclosure provides a touch substrate, a display touch panel, and a display device. The touch substrate includes multiple touch electrodes and multiple touch leads. The touch substrate includes a touch area and a non-touch area. The touch electrodes are located in the touch area, and the touch leads are located in the non-touch area and provide signals to the multiple touch electrodes. The touch substrate includes at least one bending boundary, and the touch substrate is divided into a flat area and a bending area located on at least one side of the flat area. The touch substrate includes: a first side, a second side adjacent to the first side, and a corner between the first side and the second side. At least one bending boundary is at least partially located in the touch area and extends into the non-touch area. The at least one bending boundary extends generally along the extension direction of the first side and intersects with the second side. The touch leads include: a corner lead, one end of which is connected to a first lead portion. The first lead portion extends generally along the extension direction of the second side, and the corner lead completely falls into the bending area and does not overlap with the bending boundary.

Description

Technical Field

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

[0002] With the rapid development and application of flexible organic light-emitting diode display technology, improving consumers' aesthetic experience of highly integrated on-cell flexible touch products, reducing the current production cost of flexible products, and improving the yield of flexible products have become some of the key issues that need to be addressed in the current flexible product industry. Summary of the Invention

[0003] This disclosure provides a touch substrate comprising multiple touch electrodes and multiple touch leads. The touch substrate includes a touch area and a non-touch area. The multiple touch electrodes are located in the touch area, and the multiple touch leads are located in the non-touch area and configured to provide signals to the multiple touch electrodes. The touch substrate includes at least one bending boundary and is divided into a flat area and a bending area located on at least one side of the flat area.

[0004] The touch substrate includes: a first side, a second side adjacent to the first side, and a corner between the first side and the second side; at least one bending boundary is at least partially located in the touch area and extends into the non-touch area, and the at least one bending boundary extends generally along the extension direction of the first side and intersects with the second side.

[0005] At least one of the multiple touch leads includes: a corner lead located at at least one corner of the touch substrate, a first lead portion connected to one end of the corner lead, the first lead portion extending substantially along the extension direction of the second side, and the corner lead falling completely into the bending area and not overlapping with the bending boundary.

[0006] In some embodiments, the first lead portion at least partially falls into the bending area and overlaps with the bending boundary.

[0007] In some embodiments, the other end of the corner lead is connected to a second lead portion, which extends substantially along the extension direction of the first side, falls completely into the bending area, and does not overlap with the bending boundary.

[0008] In some embodiments, the end of the second lead portion that is not connected to the corner lead is electrically connected to one of a plurality of touch electrodes.

[0009] In some embodiments, the touch substrate further includes: a plurality of terminals located in the non-touch area; and a first lead portion electrically connected to one of the plurality of terminals.

[0010] In some embodiments, the touch substrate further includes: a plurality of terminals located in the non-touch area; at least one of the plurality of touch leads includes: two corner leads and two first lead portions; a second lead portion connects to the two corner leads; one of the two first lead portions is electrically connected to one of the plurality of terminals, and the other of the two first lead portions is electrically connected to one of the plurality of touch electrodes.

[0011] In some embodiments, the other end of the corner lead is electrically connected to one of a plurality of touch electrodes.

[0012] In some embodiments, the touch substrate further includes a third side disposed opposite to the first side; the touch substrate includes: two bending boundaries adjacent to the first side and the third side respectively, and the touch substrate is divided into a flat area and bending areas located on both sides opposite to the flat area.

[0013] In some embodiments, at least one of the multiple touch leads includes a corner lead located at the corner between the third side and the second side.

[0014] In some embodiments, the corner lead is an arc-shaped lead, the first lead portion is a straight lead, and the second lead portion is a straight lead.

[0015] In some embodiments, the boundary between the touch area and the non-touch area has an arc portion, the radius of which is smaller than the radius of the corner lead.

[0016] In some embodiments, the first lead portion includes a first lead layer and a second lead layer stacked together.

[0017] In some embodiments, in the region where the bending boundary overlaps with the first lead portion, the second lead layer is electrically connected to the first lead layer.

[0018] In some embodiments, the touch module further includes a first insulating layer located between the first lead layer and the second lead layer, the first insulating layer having a first via through its thickness; the bending boundary overlaps with the first via, and the second lead layer is electrically connected to the first lead layer through the first via.

[0019] In some embodiments, the touch module further includes a first insulating layer located between the first lead layer and the second lead layer, the first insulating layer having a first via through its thickness; the bending boundary does not overlap with the first via, and the first via is at least partially within the overlapping area, the second lead layer being electrically connected to the first lead layer through the first via.

[0020] In some embodiments, the first lead layer or the second lead layer includes a first sub-lead portion and a second sub-lead portion that are disconnected at the bending boundary.

[0021] In some embodiments, the distance between the edge of the first sub-lead near the bending limit and the bending limit is equal to the distance between the edge of the second sub-lead near the bending limit and the bending limit.

[0022] In some embodiments, the second lead layer is located on the touch surface side of the first lead layer facing the touch substrate, and the first lead layer includes a first sub-lead portion and a second sub-lead portion.

[0023] In some embodiments, the bending angle of the bending area is greater than or equal to 80 degrees.

[0024] This disclosure provides a display touch panel, comprising:

[0025] The driving backplate includes the display area and the surrounding area of ​​the display area;

[0026] Multiple light-emitting devices are located on one side of the driving backplate in the display area;

[0027] The encapsulation layer is located on the side of the light-emitting device that is away from the driving backplane;

[0028] The touch substrate provided in this embodiment is formed directly on the encapsulation layer.

[0029] In some embodiments, the display area overlaps with the touch area, and the display area includes a plurality of pixels arranged in an array;

[0030] The number of pixel columns N between the edge of the flat display area and the nearest bend boundary, the bend radius r1 of the corner leader closest to the display area, and the pixel pitch P pixel The total thickness of the touch substrate must meet the following conditions:

[0031]

[0032] In some embodiments, the radius of the corner lead closest to the display area is greater than or equal to 1.5 mm and less than or equal to 2.4 mm.

[0033] This disclosure provides a display device, including a display touch panel provided in this disclosure.

[0034] In some embodiments, it also includes:

[0035] The cover plate is attached to the touch panel on the side of the touch substrate away from the driving back plate. The cover plate has the same bending area and flat area as the touch substrate.

[0036] In some embodiments, when the first lead portion includes a first lead layer and a second lead layer stacked together, and the first lead layer or the second lead layer includes a first sub-lead portion and a second sub-lead portion disconnected at a bending boundary, the number n of pixel columns spaced between the first sub-lead portion and the second sub-lead portion and the bending boundary satisfies the following condition:

[0037] n=(A+W) / P pixel ;

[0038] Where A represents the bonding accuracy between the cover plate and the display touch panel, and W represents the maximum range of bending stress transmission experienced by the display touch panel. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 A schematic diagram of the structure of a touch substrate provided for related technologies;

[0041] Figure 2 This is a schematic diagram of the structure of a touch substrate provided in an embodiment of the present disclosure;

[0042] Figure 3 A cross-sectional view of a touch substrate extending along a bending boundary, provided in an embodiment of this disclosure;

[0043] Figure 4 A cross-sectional view of another touch substrate provided in an embodiment of this disclosure, extending along the bending boundary;

[0044] Figure 5 This is a structural diagram of the first lead layer of a touch substrate provided in an embodiment of the present disclosure;

[0045] Figure 6 This is a schematic diagram of the structure of a display touch panel provided in an embodiment of the present disclosure;

[0046] Figure 7 This is a schematic diagram of another display touch panel provided in an embodiment of the present disclosure;

[0047] Figure 8 This is a schematic diagram of the structure of a display device provided in an embodiment of the present disclosure;

[0048] Figure 9 This is a schematic diagram of another display device provided in an embodiment of the present disclosure. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Furthermore, the embodiments and features in the embodiments of this disclosure can be combined with each other without conflict. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0050] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0051] It should be noted that the dimensions and shapes of the figures in the accompanying drawings do not reflect actual proportions and are intended only to illustrate the content of this disclosure. Furthermore, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0052] A waterfall screen with a large-angle cover glass (CG) lamination has undoubtedly attracted the attention of consumers with its stunning design. However, the aforementioned high-specification flexible On-cell large-angle CG bending product undoubtedly poses a great challenge to various manufacturing processes. Among them, the problem of cracks in the touch signal traces at the four corners of the flexible touch display caused by the large-angle CG lamination is more serious, reducing the product design yield.

[0053] It should be noted that in related technologies, such as Figure 1 As shown, the touch lead 9 is located in the peripheral area 5 and is disposed along the edge of the display area 4. At least a portion of the touch lead 9 includes an arc portion. The boundary between the bending area 13 and the flat area 12 of the display product (shown by the dotted line in the figure) overlaps with the arc portion of the touch lead. That is, the bending boundary of the display product cover plate overlaps with the arc portion of the touch lead. The cover plate adhesion will cause the touch lead at the bending boundary to receive bending stress, and the arc portion will receive greater stress, which is prone to breakage of the arc portion at the bending boundary, affecting the yield of the display product.

[0054] Based on the aforementioned problems existing in related technologies, this disclosure provides a touch substrate, such as... Figure 2 As shown, the system includes multiple touch electrodes 8 and multiple touch leads 9. The touch substrate includes a touch area 28 and a non-touch area 29. The multiple touch electrodes 8 are located in the touch area 28, and the multiple touch leads 9 are located in the non-touch area 29 and are configured to provide signals to the multiple touch electrodes 8. The touch substrate includes at least one bending boundary 30, and the touch substrate is divided into a flat area 12 and a bending area 13 located on at least one side of the flat area 12. For example, the bending area 13 may be located on opposite sides of the flat area 13.

[0055] The touch substrate includes: a first side 31, a second side 32 adjacent to the first side 31, and a corner 33 between the first side 31 and the second side 32; at least one bending boundary 30 is at least partially located in the touch area 28 and extends to the non-touch area 29, and the at least one bending boundary 30 extends generally along the extension direction of the first side 31 and intersects with the second side 32.

[0056] At least one of the multiple touch leads 9 includes: a corner lead 10 located at at least one corner 33 in the touch substrate, a first lead portion 11 connected to one end of the corner lead 10, the first lead portion 11 extending substantially along the extension direction of the second side 32, and the corner lead 10 falling completely into the bending area 13 and not overlapping with the bending boundary 30.

[0057] The touch substrate provided in this embodiment has a corner lead of the touch lead that falls completely into the bending area. The first lead portion of the touch lead extends from the bending area to the flat area, meaning that the bending boundary overlaps with the first lead portion but not with the corner lead. This reduces the bending stress on the touch lead, prevents breakage of the touch lead in the area overlapping with the bending boundary, and improves the yield of touch products.

[0058] In some embodiments, the corner of the touch substrate is located at the position where any two of the four sides of the touch substrate are adjacent to each other.

[0059] In some embodiments, such as Figure 2 As shown, the touch substrate includes four corner portions 33. The touch substrate includes a third side 34 disposed opposite to the first side 31; the third side 34 and the second side 32 are also connected via corner portions 33. Figure 2 As shown, the touch substrate includes two bending boundaries 30, adjacent to the first side 31 and the third side 34 respectively, and the touch substrate is divided into a flat area 12 and bending areas 13 located on opposite sides of the flat area 12. Wherein, as Figure 2 As shown, the two bending boundaries 30 are: the first bending boundary 35 adjacent to the first side 31, and the second bending boundary 36 adjacent to the third side 34.

[0060] In some embodiments, the first side, the second side, and the third side are all straight sides.

[0061] In some embodiments, the location of the corner can be arc-shaped or any other arbitrary shape. For example, the corner may include an arc shape or the location of a part of a straight edge.

[0062] In some embodiments, the corner leads of the touch leads are located at least at the location of at least one corner of the touch substrate.

[0063] In some embodiments, such as Figure 2 As shown, the corner lead 10 is an arc lead, and the first lead portion 11 is a straight lead.

[0064] In some embodiments, corner leads are not limited to an arc shape and can be defined as any shape in which the touch lead is routed according to the contour and shape of the transition region as it transitions from one straight edge area to another, with the extension direction of the touch lead changing at the beginning and end of the transition region. In the corner, the corner lead has at least one extension direction different from the straight portions of the touch leads in the two adjacent straight edge areas. The corner lead enables a smooth transition and connection between two intersecting touch leads.

[0065] In some embodiments, such as Figure 2 As shown, the first lead portion 11 at least partially falls into the bending area 13 and overlaps with the bending boundary 30.

[0066] In some embodiments, such as Figure 2 As shown, the portion of the first lead 11 near the corner lead 10 falls into the bending area 13, while the portion away from the corner lead 10 falls into the flat area 12.

[0067] In some embodiments, such as Figure 2 As shown, the first lead portion 11 and the second side 32 extend along the first direction X, and the first side 31 and the bending boundary 30 extend along the second direction Y.

[0068] In some embodiments, such as Figure 2 As shown, the first direction X and the second direction Y are perpendicular, that is, the extension direction of the first lead portion 11 is perpendicular to the extension direction of the bending boundary 30.

[0069] In some embodiments, such as Figure 2 As shown, the touch electrode 8 includes: a plurality of touch sensing electrodes RX extending along a first direction X, and a plurality of touch driving electrodes TX extending along a second direction Y.

[0070] In practice, both the touch sensing electrode RX and the touch driving electrode TX need to be electrically connected to the touch leads.

[0071] In practical implementation, the touch leads are used to provide driving signals to the corresponding touch electrodes or to receive sensing signals from the corresponding touch electrodes. That is, the touch leads electrically connected to the touch sensing electrode RX receive the sensing signals from the corresponding touch sensing electrode RX, and the touch leads electrically connected to the touch driving electrode TX provide driving signals to the corresponding touch driving electrode TX.

[0072] It should be noted that, Figure 2 The example below illustrates this by using the touch sensing electrode RX and the touch driving electrode TX as strips.

[0073] In a specific implementation, the touch sensing electrode RX and the touch driving electrode TX may include rhomboid block electrodes.

[0074] In practice, the touch electrodes can be, for example, mesh-shaped electrodes.

[0075] In some embodiments, such as Figure 2 As shown, the other end of the corner lead 10 is connected to the second lead portion 20. The second lead portion 20 extends approximately along the extension direction of the first side 31, falls completely into the bending area 13, and does not overlap with the bending boundary 30.

[0076] In some embodiments, such as Figure 2 As shown, the second lead portion is a straight lead extending along the second direction Y.

[0077] In some embodiments, such as Figure 2 As shown, the touch board also includes multiple terminals 24 located in the non-touch area.

[0078] In some embodiments, a portion of the touch lead includes only a first lead portion, a corner lead, and a second lead portion. The end of the second lead portion not connected to the corner lead is electrically connected to one of a plurality of touch electrodes, and the first lead portion is electrically connected to one of a plurality of terminals.

[0079] In some embodiments, the touch sensing electrode RX is electrically connected to the touch lead in the extending direction of the touch sensing electrode RX, i.e., as shown below. Figure 2 As shown, multiple touch sensing electrodes RX are electrically connected to multiple first touch leads 21 on one side of their extension direction. Each first touch lead 21 includes only one first lead portion 11.

[0080] In some embodiments, such as Figure 2 As shown, the first touch lead 21 includes: a corner lead 10, a first lead portion 11 connected to one end of the corner lead 10, and a second lead portion 20 electrically connected to the other end of the corner lead 10 and the touch electrode 8; the second lead portion 20 falls completely into the bending area 13.

[0081] In some embodiments, such as Figure 2 As shown, the first lead portion 11 of the first touch lead 21 is electrically connected to one of the plurality of terminals 24.

[0082] In some embodiments, at least one of the plurality of touch leads includes: two corner leads and two first lead portions; a second lead portion connects to the two corner leads; one of the two first lead portions is electrically connected to one of a plurality of terminals, and the other of the two first lead portions is electrically connected to one of a plurality of touch electrodes.

[0083] In some embodiments, such as Figure 2 As shown, the touch driving electrode TX is electrically connected to the second touch lead 22 on the side away from the terminal 24, that is, the second touch lead 22 needs to be connected from... Figure 2 The top of the touch substrate extends along the edge of the touch area 28 to the bottom of the touch substrate and is electrically connected to one side of the terminal 24. Thus, the second touch lead 22, electrically connected to the touch driving electrode TX, needs to pass through two corners of the touch area 28. That is, each second touch lead 22 includes two corner leads 10 and two first lead portions 11, and also includes a second lead portion 20 connecting the two corner leads 10. One of the two first lead portions 11 is configured to be electrically connected to the terminal 24, and the other of the two first lead portions 11 is electrically connected to the touch electrode 8. The second lead portion 20 falls completely into the bending area 13; both corner leads 10 fall completely into the bending area 13; the portions of the two first lead portions 11 near the corner leads 10 fall into the bending area 13, and the portions away from the corner leads 10 fall into the flat area 12.

[0084] In some embodiments, such as Figure 2 As shown, the first lead portion 11 of the plurality of first touch leads 21 overlaps with the first bending boundary 35, and the first lead portion 11 of the plurality of second touch leads 22 overlaps with the second bending boundary 36. The second lead portion 20 of the plurality of first touch leads 21 is located between the first bending boundary 35 and the first side 31, and the corner lead 10 of the plurality of first touch leads 21 is located at the corner between the first side 31 and the second side 23. The second lead portion 20 of the plurality of second touch leads 22 is located between the second bending boundary 36 and the third side 34, and the corner lead 10 of the plurality of second touch leads 22 is located at the corner between the third side 34 and the second side 23.

[0085] It should be noted that, Figure 2 The example given is that some touch leads extend from the top of the touch substrate along the edge of the touch area to the bottom of the touch substrate. Of course, in actual implementation, some touch leads can also be electrically connected from the bottom of the touch substrate to the touch electrode extending along the second direction Y. In this case, the touch leads do not include corner leads and do not overlap with the bending boundary.

[0086] In some embodiments, at least some of the touch leads have their corner leads electrically connected at the other end to one of the plurality of touch electrodes. That is, the corner leads in some of the touch leads may not be electrically connected to the touch electrodes via a second lead portion. In a specific implementation, for example, the touch sensing electrode RX closest to the bottom of the touch substrate may be directly electrically connected to the other end of the corner lead.

[0087] In some embodiments, the boundary between the touch area and the non-touch area has an arc portion, the radius of which is smaller than the radius of the corner lead. The arc radius of the corner of the touch substrate is larger than the radius of the corner lead.

[0088] In some embodiments, such as Figure 3 As shown, the first lead portion 11 includes a first lead layer 15 and a second lead layer 16 stacked together.

[0089] In some embodiments, the portion of the touch lead other than the first lead portion may also include a first lead layer and a second lead layer stacked together.

[0090] In some embodiments, the first lead layer of the first lead portion is connected to the first lead layer of the remaining portion, and the second lead layer of the first lead portion is connected to the second lead layer of the remaining portion.

[0091] In some embodiments, such as Figure 3 As shown, in the area where the bending boundary overlaps with the first lead portion, the second lead layer 16 is electrically connected to the first lead layer 15.

[0092] It should be noted that the area where the bending boundary overlaps with the first lead portion refers to the area where the bending boundary and the area within a predetermined distance range on both sides of the first direction X overlap with the first lead portion. In specific implementations, such as... Figure 2 As shown, the bending boundary 30 overlaps with the first lead portion 11 in the first sub-region 14 of the non-touch area 29. The area where the bending boundary and the first lead portion overlap is the first sub-region.

[0093] In some embodiments, such as Figure 3 As shown, the touch substrate 2 also includes a first insulating layer 17 located between the first lead layer 15 and the second lead layer 16. The first insulating layer 17 has a first via 25 that extends through its thickness. The bending boundary overlaps with the first via 25. The second lead layer 16 is electrically connected to the first lead layer 15 through the first via 25.

[0094] The touch substrate provided in this embodiment has an overlapping area between the bending boundary and the first via. By adding the first via to the first insulating layer, bending stress can be released in the subsequent cover plate bonding process, which can further reduce the stress on the touch leads and further prevent the touch leads from breaking in the area overlapping with the bending boundary, thereby improving the yield of touch products.

[0095] Alternatively, in some embodiments, such as Figure 3 As shown, the touch substrate 2 also includes a first insulating layer 17 located between the first lead layer 15 and the second lead layer 16. The first insulating layer 17 has a first via 25 extending through its thickness. The bending boundary does not overlap with the first via 25, and the first via 25 is at least partially in the overlapping area. The second lead layer 16 is electrically connected to the first lead layer 15 through the first via 25.

[0096] In some embodiments, the first lead layer or the second lead layer includes a first sub-lead portion and a second sub-lead portion that are disconnected at the bending boundary.

[0097] That is, one of the lead layers is broken in the area where the bending boundary overlaps with the first lead portion. In this way, the film thickness of the touch module in the area where the bending boundary overlaps with the first via can be reduced, thereby reducing the film stress generated on the touch lead during cover plate bonding and the problem of different film layers peeling or breaking due to stress gradient differences, which can improve the yield of touch products.

[0098] In some embodiments, such as Figure 4 , Figure 5 As shown, the second lead layer 16 is located on the touch surface side of the first lead layer facing the touch substrate, and the first lead layer 15 includes a first sub-lead portion 37 and a second sub-lead portion 38.

[0099] In some embodiments, such as Figure 3 , Figure 4 As shown, the touch substrate 2 also includes a substrate 18 located on the side of the first lead layer 15 and away from the first insulating layer 17, and a protective layer 19 located on the side of the second lead layer 16 away from the first insulating layer 17.

[0100] In some embodiments, the first lead layer and the second lead layer comprise metallic materials.

[0101] In some embodiments, the plurality of touch electrodes include a first touch electrode layer and a second touch electrode layer. The first touch electrode layer is disposed in the same layer as the first lead layer, and the second touch electrode layer is disposed in the same layer as the second lead layer.

[0102] In specific implementations, the touch sensing electrode and the touch driving electrode may be located in the first touch electrode layer and the second touch electrode layer, respectively. Alternatively, the touch sensing electrode or the touch driving electrode may include an electrode portion and a bridging portion, with the bridging portion located in one of the first touch electrode layers and the second touch electrode layer, and the electrode portion located in the other layer.

[0103] It should be noted that, Figure 3 , Figure 4 This is a cross-sectional view along the bending boundary in the non-touch area. For example, in a practical implementation, Figure 3 , Figure 4 It can be a cross-sectional view along the bending boundary in the non-touch area.

[0104] In some embodiments, when the first lead portion 11 in the first sub-region includes a first lead layer and a second lead layer, and the first lead layer and the second lead layer are electrically connected through a first via, the orthographic projection of the first via onto the plane of the flat area of ​​the touch substrate falls into the first sub-region.

[0105] In some embodiments, when the first lead layer or the second lead layer in the first sub-region includes a disconnected first sub-lead portion and a second sub-lead portion, the first sub-lead portion and the second sub-lead portion are respectively located on both sides of the first sub-region. That is, the first sub-lead portion and the second sub-lead portion.

[0106] In some embodiments, such as Figure 5 As shown, the first sub-lead portion 37 and the second sub-lead portion 38 are disconnected in the first sub-region 14. The edge of the first sub-lead portion 37 near the bending boundary 30 coincides with the edge of the first sub-region 14, and the edge of the second sub-lead portion 38 near the bending boundary 30 coincides with the edge of the first sub-region 14.

[0107] In some embodiments, such as Figure 2 As shown, the bending boundary 30 bisects the first sub-region 14. That is, the distance between the edge of the first sub-lead portion 37 near the bending boundary 30 and the bending boundary 30 is equal to the distance between the edge of the second sub-lead portion 38 near the bending boundary 30 and the bending boundary 30.

[0108] In some embodiments, the distance between the edge of the first sub-region extending along the second direction and the bending boundary is 200 micrometers.

[0109] In some embodiments, the bending angle of the bending region is greater than or equal to 80 degrees. In a specific implementation, the bending angle of the bending region is, for example, 88 degrees.

[0110] Based on the same inventive concept, this disclosure also provides a display touch panel, such as... Figure 6 , Figure 7 As shown, it includes:

[0111] The drive backplate 1 includes a display area and a surrounding area of ​​the display area;

[0112] Multiple light-emitting devices (not shown) are located on one side of the drive backplate 1 in the display area;

[0113] Encapsulation layer 26 is located on the side of the light-emitting device away from the driving backplane;

[0114] The touch substrate 2 provided in this embodiment is formed directly on the encapsulation layer 26.

[0115] It should be noted that the display area coincides with the touch area of ​​the touch substrate, and the peripheral area coincides with the non-touch area. The display touch panel has the same curved and flat areas as the touch substrate.

[0116] The display touch panel provided in this embodiment includes the touch substrate described above. The corner leads of the touch leads completely fall into the bending area, and the first lead portion of the touch lead extends from the bending area to the flat area. That is, the bending boundary overlaps with the first lead portion but not with the corner lead. This reduces the bending stress on the touch leads, prevents breakage of the touch leads in areas overlapping with the bending boundary, and improves the yield of display products.

[0117] In specific implementation, the embodiments of this disclosure adopt Flexible Multi Layer On Cell (FMLOC) technology to directly fabricate the touch substrate on the encapsulation layer, thereby achieving a thinner and lighter product.

[0118] In some embodiments, the substrate 18 in the touch substrate 2 may be, for example, a buffer layer fabricated on the encapsulation layer 39.

[0119] In some embodiments, the driving backplane includes: a substrate, and a pixel driving circuit layer disposed on the substrate. In some embodiments, the substrate may be, for example, a flexible substrate. In some embodiments, the pixel driving circuit layer includes a pixel driving circuit array, and the pixel driving circuit includes, for example, transistors and capacitors. A light-emitting device is electrically connected to the pixel driving circuit.

[0120] In practice, the encapsulation layer may be composed of an inorganic layer and an organic layer stacked together.

[0121] In some embodiments, the display area coincides with the touch area, and the peripheral area coincides with the non-touch area; the display area includes multiple pixels. That is, the bend boundary passes through the display area.

[0122] In some embodiments, the number of pixel columns N between the edge of the display area in the flat area and the nearest bending boundary, the bending radius r1 of the corner lead closest to the display area, and the pixel pitch P are specified. pixelThe total thickness of the touch substrate must meet the following conditions:

[0123]

[0124] In some embodiments, the radius r1 of the corner lead closest to the touch area is greater than or equal to 1.5 mm and less than or equal to 2.4 mm.

[0125] It should be noted that in related technologies, the radius of the corner leads of the touch leads is usually greater than 7 mm. This not only causes overlap between the bending boundary and the corner leads, but also results in a larger space occupied by the touch leads in the non-touch area. This significantly increases the display area size at the corners of the display product, hindering the achievement of narrow bezel displays, reducing the effective light-emitting area of ​​the display area and the integrity of the touch electrodes near the corners, affecting the performance of the display product, and also increasing the production cost of the display product.

[0126] The display touch panel provided in this embodiment reduces the radius of the corner leads of the touch leads. This allows the bending boundary to overlap with the straight leads of the touch leads, but not with the corner leads, without changing the bending position of the display product. This reduces the bending stress on the touch leads, preventing breakage at the bending boundary and improving the yield of the display product. Furthermore, reducing the radius of the corner leads also reduces the space occupied by the touch leads in the non-touch area, thus reducing the size of the non-touch area (i.e., the peripheral area), facilitating narrow bezel displays and increasing the effective light-emitting area of ​​the display area. Moreover, the reduced radius of the corner leads also reduces the corner size of the display area, ensuring the integrity of the touch electrodes near the corners, improving display product performance, and reducing production costs.

[0127] In practical implementation, for example, the bending boundary is spaced 48 columns apart from the boundary of the display area extending along the second direction, with a pixel pitch of 2 millimeters, i.e. Figure 2 As shown, the distance h1 between the bending boundary 30 and the boundary of the display area (touch area 28) extending along the second direction Y is approximately 96 mm.

[0128] In some embodiments, such as Figure 2 As shown, the distance h2 between the edge of the touch area 28 extending along the second direction Y and the first side 31 is 1 mm. The distance h3 between the edge of the touch area 28 extending along the first direction X and the bottom second side is 1.3 mm.

[0129] In some embodiments, the radius of the corner arc of the touch substrate is greater than or equal to 1 mm and less than or equal to 3.5 mm.

[0130] Based on the same inventive concept, this disclosure also provides a display device, such as... Figure 8, Figure 9 As shown, it includes the display touch panel 27 provided in the embodiments of this disclosure.

[0131] In some embodiments, such as Figure 8 , Figure 9 As shown, the display device also includes:

[0132] The cover plate 3 is attached to the display touch panel 27 on the side of the touch substrate 2 away from the driving back plate 1. The cover plate 3 has the same bending area and flat area as the touch substrate 2.

[0133] The display device provided in this disclosure includes the display touch panel described above. The corner lead of the touch lead completely falls into the bending area, and the first lead portion of the touch lead extends from the bending area to the flat area. That is, the bending boundary overlaps with the first lead portion but not with the corner lead. This reduces the bending stress on the touch lead during the cover plate bending process, preventing breakage of the touch lead in the area overlapping with the bending boundary, and improving the yield of the display product.

[0134] In some embodiments, the bending angle of the cover plate's bending area is greater than or equal to 80 degrees. In a specific implementation, the bending angle of the bending area is, for example, 88 degrees.

[0135] In some embodiments, when the first lead portion includes a first lead layer and a second lead layer stacked together, and the first lead layer or the second lead layer includes a first sub-lead portion and a second sub-lead portion disconnected at a bending boundary, the number n of pixel columns spaced between the first sub-lead portion and the second sub-lead portion and the bending boundary satisfies the following condition:

[0136] n=(A+W) / P pixel ;

[0137] Where A represents the bonding accuracy between the cover plate and the display touch panel, and W represents the maximum range of bending stress transmission experienced by the display touch panel.

[0138] In a practical implementation, the display device may also include a frame, in which the display touch panel can be embedded, and the edge of the peripheral area corresponds to the frame boundary.

[0139] The display device provided in this disclosure includes any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator. Other essential components of this display device are understood by those skilled in the art and will not be described in detail here, nor should they be construed as limiting this disclosure. Implementation of this display device can be found in the embodiments of the touch substrate and display touch panel described above; repeated details will not be elaborated upon.

[0140] In summary, the touch substrate, display touch panel, and display device provided in this disclosure have a touch lead where the corner lead of the touch lead completely falls into the bending area, and the first lead portion of the touch lead extends from the bending area to the flat area, meaning that the bending boundary overlaps with the first lead portion but not with the corner lead. This reduces the bending stress on the touch lead, prevents breakage of the touch lead in the area overlapping with the bending boundary, and improves the yield of touch products.

[0141] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0142] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if these modifications and variations to the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A touch substrate, comprising a plurality of touch electrodes and a plurality of touch lead lines, wherein, The touch substrate includes a touch area and a non-touch area, the plurality of touch electrodes are located in the touch area, and the plurality of touch leads are located in the non-touch area and are configured to provide signals to the plurality of touch electrodes; wherein, the touch substrate includes at least one bending boundary, and the touch substrate is divided into a flat area and a bending area located on at least one side of the flat area; The touch substrate includes: a first side, a second side adjacent to the first side, and a corner between the first side and the second side; the at least one bending boundary is at least partially located in the touch area and extends to the non-touch area, the at least one bending boundary extends generally along the extension direction of the first side and intersects with the second side; At least one of the multiple touch leads includes: a corner lead located at at least one corner of the touch substrate, one end of the corner lead being connected to a first lead portion, the first lead portion extending substantially along the extension direction of the second side, and the corner lead falling completely into the bending area and not overlapping with the bending boundary. The first lead portion includes a first lead layer and a second lead layer stacked together; In the region where the bending boundary overlaps with the first lead portion, the second lead layer is electrically connected to the first lead layer. 2.The touch substrate of claim 1, wherein, The first lead portion at least partially falls into the bending area and overlaps with the bending boundary. 3.The touch substrate of claim 1 or 2, wherein, The other end of the corner lead is connected to the second lead portion, which extends approximately along the extension direction of the first side, falls completely into the bending area, and does not overlap with the bending boundary. 4.The touch substrate of claim 3, wherein, The end of the second lead portion that is not connected to the corner lead is electrically connected to one of the plurality of touch electrodes. 5.The touch substrate of claim 4, wherein, The touch substrate further includes: a plurality of terminals located in the non-touch area; the first lead portion is electrically connected to one of the plurality of terminals. 6.The touch substrate of claim 3, wherein, The touch substrate further includes: a plurality of terminals located in the non-touch area; at least one of the plurality of touch leads includes: two corner leads and two first lead portions; the second lead portion connects to the two corner leads; one of the two first lead portions is electrically connected to one of the plurality of terminals, and the other of the two first lead portions is electrically connected to one of the plurality of touch electrodes. 7.The touch substrate of claim 1 or 2, wherein, The other end of the corner lead is electrically connected to one of the plurality of touch electrodes. 8.The touch substrate of any of claims 1-2, 4-6, wherein, The touch substrate further includes a third side disposed opposite to the first side; the touch substrate includes two bending boundaries, which are respectively adjacent to the first side and the third side, and the touch substrate is divided into a flat area and bending areas located on both sides opposite to the flat area. 9.The touch substrate of claim 8, wherein, At least one of the multiple touch leads includes a corner lead located at the corner between the third side and the second side. 10.The touch substrate of claim 8, wherein, The other end of the corner lead is connected to the second lead section; the corner lead is an arc-shaped lead, the first lead section is a straight lead, and the second lead section is a straight lead. 11.The touch substrate of claim 10, wherein, The boundary between the touch area and the non-touch area has an arc portion, the radius of which is smaller than the radius of the corner lead. 12.The touch substrate of any one of claims 1-2, 4-6, 9-11, wherein, The touch substrate further includes a first insulating layer located between the first lead layer and the second lead layer, the first insulating layer having a first via through its thickness; the bending boundary overlaps with the first via, and the second lead layer is electrically connected to the first lead layer through the first via. 13.The touch substrate of any one of claims 1-2, 4-6, 9-11, wherein, The touch substrate further includes a first insulating layer located between the first lead layer and the second lead layer, the first insulating layer having a first via through its thickness; the bending boundary does not overlap with the first via, and the first via is at least partially in the overlapping area, the second lead layer being electrically connected to the first lead layer through the first via.

14. The touch substrate according to any one of claims 1-2, 4-6, and 9-11, wherein, The first lead layer or the second lead layer includes a first sub-lead portion and a second sub-lead portion that are disconnected at the bending boundary. 15.The touch substrate of claim 14, wherein, The distance between the edge of the first sub-lead portion near the bending limit and the bending limit is equal to the distance between the edge of the second sub-lead portion near the bending limit and the bending limit. 16.The touch substrate of claim 14, wherein, The second lead layer is located on the side of the first lead layer facing the touch surface of the touch substrate, and the first lead layer includes the first sub-lead portion and the second sub-lead portion. 17.The touch substrate of any one of claims 1-2, 4-6, 9-11, 15-16, wherein, The bending angle of the bending zone is greater than or equal to 80 degrees.

18. A display touch panel, wherein, The display touch panel includes: A drive backplate includes a display area and a peripheral area surrounding the display area; Multiple light-emitting devices are located on one side of the driving backplate in the display area; An encapsulation layer is located on the side of the light-emitting device that is away from the driving backplate; The touch substrate according to any one of claims 1 to 17 is directly disposed on the encapsulation layer.

19. The display touch panel according to claim 18, wherein, The display area overlaps with the touch area, and the display area includes multiple pixels arranged in an array; The number of pixel columns N between the edge of the display area in the flat area and the nearest bending boundary, the bending radius r1 of the corner lead closest to the display area, and the pixel pitch P pixel The total thickness of the touch substrate must meet the following conditions: N 。 20. The display touch panel according to claim 19, wherein, The radius r1 of the corner lead closest to the touch area is greater than or equal to 1.5 mm and less than or equal to 2.4 mm.

21. A display device, wherein, Includes the display touch panel according to any one of claims 18 to 20.

22. The display device of claim 21, wherein, Also includes: A cover plate is attached to the display touch panel on the side of the touch substrate opposite to the driving back plate, and the cover plate has the same bending area and flat area as the touch substrate.

23. The display device of claim 22, wherein, When the first lead portion includes a first lead layer and a second lead layer stacked together, and the first lead layer or the second lead layer includes a first sub-lead portion and a second sub-lead portion that are disconnected at the bending boundary, the number n of pixel columns between the first sub-lead portion and the second sub-lead portion and the bending boundary satisfies the following condition: n = (A + W) / P pixel ; Where A represents the bonding accuracy between the cover plate and the display touch panel, and W represents the maximum range of bending stress transmission experienced by the display touch panel.

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