Touch structure, touch display substrate and touch display device

Abstract

A touch structure, a touch display substrate and a touch display device. The touch structure comprises a touch area and a peripheral area surrounding the touch area, first touch electrodes and second touch electrodes crossing each other and insulated from each other, and first touch wirings and second touch wirings insulated from each other. The touch area comprises opposite first and second edges and opposite third and fourth edges. The first touch electrodes and the second touch electrodes are located in the touch area. The first touch wirings and the second touch wirings are located in the peripheral area. The first touch wirings are connected to the first touch electrodes at the first and second edges respectively, and the second touch wirings are connected to the second touch electrodes at the third and fourth edges respectively. The touch structure can be applied to a large-size touch display panel to improve signal transmission speed, thereby improving refresh frequency and signal uniformity.

Description

Technical Field

[0001] Embodiments of this disclosure relate to a touch structure, a touch display substrate, and a touch display device. Background Technology

[0002] With the development of touch display technology, capacitive touch screens have been widely used in organic light-emitting diode (OLED) display devices.

[0003] Capacitive touchscreens are divided into mutual capacitance touchscreens and self-capacitance touchscreens. In mutual capacitance touchscreens, horizontal and vertical electrodes are typically fabricated on the substrate surface, and capacitors are formed at the intersections of the horizontal and vertical electrodes. When a finger touches the screen, it affects the coupling between the two electrodes near the touch location, thereby changing the capacitance between these two electrodes. Based on the change in capacitance, the coordinates of the touch location can be calculated. Summary of the Invention

[0004] Embodiments of this disclosure provide a touch structure, a touch display substrate, and a touch display device. This touch structure can be applied to large-size touch display panels to improve signal transmission speed, thereby increasing refresh rate and signal uniformity.

[0005] One embodiment of this disclosure provides a touch structure, including: a touch area and a peripheral area surrounding the touch area, the touch area including opposing first and second sides, and opposing third and fourth sides; a first touch electrode and a second touch electrode that intersect and are insulated from each other, located in the touch area; and a first touch trace and a second touch trace located in the peripheral area. The first touch trace is connected to the first touch electrode on the first side and the second side, respectively; the second touch trace is connected to the second touch electrode on the third side and the fourth side, respectively.

[0006] In some examples, the touch structure further includes a first wiring convergence area and a second wiring convergence area, the first wiring convergence area and the second wiring convergence area being located on the side of the second side away from the first side. In the extension direction of the second side, the first wiring convergence area and the second wiring convergence area are located between the third side and the fourth side, and the second wiring convergence area is located on the side of the first wiring convergence area away from the third side. A portion of the first touch trace and a portion of the second touch trace extend to the first wiring convergence area, and another portion of the first touch trace and another portion of the second touch trace extend to the second wiring convergence area.

[0007] In some examples, the first touch trace includes: a first trace group and a second trace group connected to the first touch electrode on the first side, the first trace group and the second trace group being separated at approximately the middle of the first side, the first trace group extending from one side of the third side to the first trace convergence area; the second trace group extending from one side of the fourth side to the second trace convergence area; and a third trace group and a fourth trace group connected to the first touch electrode on the second side, the third trace group and the fourth trace group being separated at approximately the middle of the second side, the third trace group extending to the first trace convergence area; and the fourth trace group extending to the second trace convergence area.

[0008] In some examples, the second touch trace includes: a fifth trace group connected to the second touch electrode on the third side, the fifth trace group extending from the side where the third side is located to the first trace convergence area; and a sixth trace group connected to the second touch electrode on the fourth side, the sixth trace group extending from the side where the fourth side is located to the second trace convergence area.

[0009] In some examples, in the first routing convergence area, the fifth routing group is located between the first routing group and the third routing group; in the second routing convergence area, the sixth routing group is located between the second routing group and the fourth routing group.

[0010] In some examples, both the first touch trace and the second touch trace include two layers of conductive traces, with the two layers of conductive traces of the first touch trace overlapping and electrically connected, and the two layers of conductive traces of the second touch trace overlapping and electrically connected.

[0011] In some examples, the touch structure further includes an interlayer dielectric layer located between two conductive traces of the first touch trace and between two conductive traces of the second touch trace. The interlayer dielectric layer includes a plurality of first vias, through which the conductive traces of the two first touch traces are electrically connected, and through which the conductive traces of the two second touch traces are electrically connected.

[0012] In some examples, the first vias between the two conductive traces of the first touch trace and the first vias between the two conductive traces of the second touch trace are spaced apart in the extending direction of the first touch trace or the second touch trace.

[0013] In some examples, in the extension direction of the first touch trace or the second touch trace, the distance between adjacent first vias between two conductive traces of the first touch trace is about 500-1000 μm, and the distance between adjacent first vias between two conductive traces of the second touch trace is about 500-1000 μm.

[0014] In some examples, the first touch electrode and the second touch electrode include a grid pattern located in a touch grid layer and a bridging line located in a bridging layer. The bridging line is configured to electrically connect the grid pattern of the first touch electrode or the grid pattern of the second touch electrode at the intersection of the first touch electrode and the second touch electrode. One of the two layers of conductive traces of the first touch trace is located in the bridging layer and the other layer is located in the touch grid layer. Similarly, one of the two layers of conductive traces of the second touch trace is located in the bridging layer and the other layer is located in the touch grid layer.

[0015] In some examples, the touch structure also includes a shielding line located on the side of the first touch trace and the second touch trace away from the touch area.

[0016] In some examples, the touch structure also includes a ground wire located on the side of the shield wire away from the touch area.

[0017] An embodiment of this disclosure also provides a touch display substrate, including the touch structure described in any of the above claims, and a display substrate. The display substrate includes an organic light-emitting element and an encapsulation layer, and the touch structure is located on the encapsulation layer.

[0018] In some examples, the touch display substrate further includes a bonding area located on the side of the second edge away from the touch area, and the first touch trace and the second touch trace are connected to the bonding area.

[0019] In some examples, the touch display substrate further includes a bendable region located between the touch area and the bonding area. At least one of the first touch trace and the second touch trace is disconnected in the bendable region to form a first end near the touch area and a second end near the bonding area. The bendable region includes a first metal connection portion and a second via located on a different layer from the first touch trace and the second touch trace. The first end and the second end are respectively connected to the first metal connection portion through the second via.

[0020] In some examples, the touch display substrate further includes a pixel driving circuit layer, which includes a thin-film transistor, the thin-film transistor including a source, drain and a gate, and the first metal connection is located on the same layer as the source and drain of the thin-film transistor.

[0021] In some examples, the bendable region includes a second metal connection and a third via located on a different layer from the first metal connection. The second metal connection is located on the same layer as the gate of the thin-film transistor. In the bendable region, the first metal connection is broken into two parts at a position corresponding to the second metal connection. The two broken parts of the first metal connection are electrically connected to the second metal connection through the third via.

[0022] In some examples, the first metal connection includes an opening along a layer perpendicular to the layer in which the first metal connection is located.

[0023] In some examples, the organic light-emitting element includes an anode, an electroluminescent layer, and a cathode stacked sequentially, with the first touch electrode and the second touch electrode both at least partially overlapping the cathode.

[0024] In some examples, the touch display substrate further includes a trace transition area located between the bendable area and the bonding area; power lines electrically connected to the anode or the cathode, at least a portion of the power lines being located in the trace transition area, and the first touch trace and the second touch trace overlapping with at least a portion of the power lines located in the trace transition area.

[0025] In some examples, the touch display substrate also includes a detection line located on the side of the ground line away from the touch area.

[0026] An embodiment of this disclosure also provides a touch display device, including the touch display substrate described in any of the above claims. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure and are not intended to limit this disclosure.

[0028] Figure 1 This is a schematic diagram of a touch structure;

[0029] Figure 2A This is a schematic diagram of a touch structure according to an embodiment of the present disclosure;

[0030] Figure 2B for Figure 2A A magnified structural diagram of the G region;

[0031] Figure 3 This is a cross-sectional schematic diagram of a first touch trace according to an embodiment of the present disclosure;

[0032] Figure 4 for Figure 2A A schematic diagram of the cross-sectional structure at point T1 on the first side of the middle section;

[0033] Figure 5 for Figure 2A A magnified structural diagram of region R1 in the middle;

[0034] Figure 6 for Figure 2A A magnified structural diagram of the R2 region;

[0035] Figure 7 for Figure 2A A magnified structural diagram of the R3 region;

[0036] Figure 8 for Figure 2A A magnified structural diagram of the R4 region in the middle;

[0037] Figure 9 for Figure 2A A magnified structural diagram of the R5 region in the middle;

[0038] Figure 10 This is a schematic cross-sectional view of the display area of ​​a touch display substrate according to an embodiment of the present disclosure;

[0039] Figure 11 This is a schematic diagram of the circuit principle of a display substrate according to an embodiment of the present disclosure;

[0040] Figure 12 This is a schematic diagram of the planar structure of a touch display substrate according to an embodiment of the present disclosure;

[0041] Figure 13 for Figure 12 A magnified view of a portion of the bendable region C;

[0042] Figure 14 The bendable area C of the touch display substrate Figure 13 A schematic diagram of the cross-sectional structure along the EE direction; and

[0043] Figure 15 For the bendable area C of another touch display substrate Figure 13 A schematic diagram of the cross-sectional structure along the EE direction. Detailed Implementation

[0044] 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. 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.

[0045] 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 the 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. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0046] Figure 1 This is a schematic diagram of a touch-sensitive structure. Figure 1 As shown, the touch structure 10 includes touch electrodes 11 and touch traces 12. The touch electrodes 11 are located in the touch area T and include multiple mutually insulated first touch electrodes 111 and multiple second touch electrodes 112. The first touch electrodes 111 and second touch electrodes 112 are arranged intersectingly. As shown, the first touch electrodes 111 extend along the Y direction, and the second touch electrodes 112 extend along the X direction, with the X and Y directions intersecting. The touch traces 12 are located in the peripheral area P (e.g., surrounding the touch area T) and include multiple first touch traces 121 and multiple second touch traces 122. The first touch traces 121 are connected to the first touch electrodes 111, and the second touch traces 122 are connected to the second touch electrodes 112.

[0047] like Figure 1 As shown, the upper and lower ends of each first touch electrode 111 are respectively connected to a first touch trace 121, and the left end of each second touch electrode 112 is connected to a second touch trace 122. The touch structure 10 also includes a bonding area B, located below the touch area T, which includes a touch driver chip 13. The first touch trace 121 and the second touch trace 122 are connected to the touch driver chip 13. The first touch electrode 111 can serve as a signal transmission channel, and the second touch electrode 112 can serve as a signal receiving channel to realize the touch function.

[0048] However, in large-size touch display panels such as foldable screens, the long length of the touch traces leads to significant signal attenuation, which affects the refresh rate and signal uniformity of the touch display panel. Therefore, the aforementioned touch structure can no longer meet the touch performance requirements of large-size touch display panels.

[0049] This disclosure provides a touch structure and its manufacturing method, a touch display substrate, and a touch display device. The touch structure includes a touch area and a peripheral area surrounding the touch area, intersecting and insulated first and second touch electrodes, and insulated first and second touch traces. The touch area includes opposing first and second sides, and opposing third and fourth sides. The first and second touch electrodes are located within the touch area. The first and second touch traces are located within the peripheral area. The first touch traces are connected to the first touch electrodes on the first and second sides, respectively, and the second touch traces are connected to the second touch electrodes on the third and fourth sides, respectively. This touch structure can be applied to large-size touch display panels to improve signal transmission speed, thereby improving refresh rate and signal uniformity.

[0050] For example, this touch structure can be applied to large-sized foldable screens. For example, such as... Figure 1 As shown, the diagonal length of the foldable screen is greater than 8 inches, and its aspect ratio is approximately 8:7. Depending on the folding requirements, its folding axis can be parallel to the X direction and located near the central axis of the panel, or it can be parallel to the Y direction and located near the central axis of the panel. The terms "approximately" or "about" in this document are essentially not strictly defined and allow for values ​​within the range of manufacturing and measurement errors. In some embodiments, the aspect ratio of the foldable screen is 8:7.

[0051] The touch structure, its manufacturing method, touch display substrate, and touch display device provided in the embodiments of this disclosure are described below with reference to the accompanying drawings.

[0052] One embodiment of this disclosure provides a touch structure. Figure 2A This is a schematic diagram of the touch structure. Figure 2A As shown, the touch structure 20 includes a touch area T and a peripheral area P surrounding the touch area T, a first touch electrode 211 and a second touch electrode 212 that intersect and are insulated from each other, and a first touch trace 221 and a second touch trace 222 that are insulated from each other. The touch area T includes opposing first sides T1 and T2, and opposing third sides T3 and fourth sides T4. The first touch trace 221 and the second touch trace 222 are located in the peripheral area P. The first touch trace 221 is connected to the first touch electrode 211 at the first side T1 and the second side T2, respectively, and the second touch trace 222 is connected to the second touch electrode 212 at the third side T3 and the fourth side T4, respectively.

[0053] For example, the first side T1 and the second side T2 are parallel to each other, and the third side T3 and the fourth side T4 are parallel to each other. The extending directions of the first side T1 and the second side T2 intersect each other with the extending directions of the third side T3 and the fourth side T4, for example, they are perpendicular to each other.

[0054] Compared to Figure 1The touch structure 10 shown can have touch traces connected to both ends of its first and second touch electrodes. This improves the touch signal transmission speed, thereby increasing the refresh rate and signal uniformity. For example, the refresh rate of a touch display panel using this structure can be increased by more than 10%.

[0055] For example, the materials of the first touch trace 221 and the second touch trace 222 may include metallic materials or alloy materials, and may be single-layer metal or multi-layer metal stacks. For example, both the first touch trace 221 and the second touch trace 222 may be made of titanium, aluminum, or a titanium three-layer metal stack (Ti / Al / Ti).

[0056] For example, the number of first touch electrodes 211, second touch electrodes 212, first touch traces 221, and second touch traces 222 can all be one or more. The embodiments of this disclosure are described using the example of multiple first touch electrodes 211, second touch electrodes 212, first touch traces 221, and second touch traces 222. To simplify the accompanying drawings, Figure 2A The diagram schematically shows some of the touch electrodes and touch traces.

[0057] For example, such as Figure 2A As shown, the first touch electrode 211 extends along the Y direction, and the second touch electrode 212 extends along the X direction, with the X and Y directions intersecting. It should be noted that the first touch electrode 211 and the second touch electrode 212 may also extend along directions that have a certain angle with both the X and Y directions.

[0058] For example, the first side T1 and the second side T2 extend along the X direction, and the third side T3 and the fourth side T4 extend along the Y direction.

[0059] For example, such as Figure 2A As shown, the touch structure 20 includes a first wiring convergence area L1 and a second wiring convergence area L2. The first wiring convergence area L1 and the second wiring convergence area L2 are located on the side of the second side T2 away from the first side T1. In the extending direction of the second side T2, the first wiring convergence area L1 and the second wiring convergence area L2 are located between the third side T3 and the fourth side T4, and the second wiring convergence area L2 is located on the side of the first wiring convergence area L1 away from the third side T3. In some examples, in the extending direction of the second side T2, the first wiring convergence area L1 is located between the end of the second side T2 near the third side T3 and approximately the middle position of the second side T2, and the second wiring convergence area L2 is located between the end of the second side T2 near the fourth side T4 and approximately the middle position of the second side T2.

[0060] like Figure 2AAs shown, a portion of the first touch trace 221 and a portion of the second touch trace 222 extend to the first trace convergence area L1, while another portion of the first touch trace 221 and another portion of the second touch trace 222 extend to the second trace convergence area L2.

[0061] It should be noted that: the end of the second side T2 closest to the third side T3 refers to the intersection of the second side T2 and the third side T3; the approximate middle position of the second side T2 refers to the approximate midpoint of the second side, but is not limited to the absolute midpoint. At the approximate middle position of the second side T2, the first touch trace 221 converges to the left and right sides respectively. For example, Figure 2A Nine first touch electrodes 211 extending along the Y direction are shown. In the first touch traces 221 located on the second side T2, the four first touch traces 221 on the left converge to the first trace convergence area L1, and the five first touch traces 221 on the right converge to the second trace convergence area L2. At this time, the approximate middle position of the second side T2 is located between the lower end of the fourth first touch trace 221 and the lower end of the fifth first touch trace 221. Figure 2A This is merely one example, and the embodiments disclosed herein are not limited thereto. For example, the approximate middle position of the second side T2 may also be located between the lower end of the third first touch trace 221 and the lower end of the fourth first touch trace 221. Alternatively, the number of first touch electrodes 211 may be greater than or less than nine.

[0062] For example, such as Figure 2A As shown, the first touch trace 221 includes a first trace group 2211 and a second trace group 2212 connected to the first touch electrode 211 on the first side T1. The first trace group 2211 and the second trace group 2212 are separated at approximately the middle position of the first side T1. Figure 2A As shown, the first routing group 2211 is located to the left of approximately the middle position of the first side T1, and the second routing group 2212 is located to the right of approximately the middle position of the first side T1. The first routing group 2211 extends from the side where the third side T3 is located to the first routing convergence area L1. The second routing group 2212 extends from the side where the fourth side T4 is located to the second routing convergence area L2. The approximate middle position of the first side T1 has a similar meaning to the approximate middle position of the second side T2, and will not be explained further here.

[0063] like Figure 2A As shown, the first touch trace 221 also includes a third trace group 2213 and a fourth trace group 2214 connected to the first touch electrode 211 on the second side T2. The third trace group 2213 and the fourth trace group 2214 are separated at approximately the middle position of the second side T2. Figure 2AAs shown, the third wiring group 2213 is located to the left of approximately the middle position of the second side T2, and the fourth wiring group 2214 is located to the right of approximately the middle position of the second side T2. Multiple first touch traces 221 of the third wiring group 2213 extend to the first wiring convergence area L1, and multiple first touch traces 221 of the fourth wiring group 2214 extend to the second wiring convergence area L2. The third wiring group 2213 extends from the middle position of the second side T2 and the end of the second side T2 near the third side T3 to the first wiring convergence area L1. The fourth wiring group 2214 extends from the middle position of the second side T2 and the end of the second side T2 near the fourth side T4 to the second wiring convergence area L2. In embodiments of this disclosure, each wiring group includes at least one touch trace.

[0064] It should be noted that the positions of the first wiring convergence area L1 and the second wiring convergence area L2 along the extension direction of the second side T2 can be adjusted according to actual needs. For example, the first wiring convergence area L1 can also be located at the end of the second side T2 near the third side T3, and correspondingly, the third wiring group 2213 can extend from the middle position of the second side T2 to the first wiring convergence area L1. For example, the second wiring convergence area L2 can also be located at the end of the second side T2 near the fourth side T4, and correspondingly, the fourth wiring group 2214 can extend from the middle position of the second side T2 to the second wiring convergence area L2. This disclosure does not limit this.

[0065] For example, such as Figure 2A As shown, the second touch trace 222 includes a fifth trace group 2221 connected to the second touch electrode 212 on the third side T3. The fifth trace group 2221 extends along the third side T3 in the direction close to the second side T2 to the first trace convergence area L1.

[0066] like Figure 2A As shown, the second touch trace 222 also includes a sixth trace group 2222 connected to the second touch electrode 212 on the fourth side T4. The sixth trace group 2222 extends along the fourth side T4 in the direction close to the second side T2 to the second trace convergence area L2.

[0067] For example, such as Figure 2A As shown, in the first cabling convergence area L1, the fifth cabling group 2221 is located between the first cabling group 2211 and the third cabling group 2213. In the second cabling convergence area L2, the sixth cabling group 2222 is located between the second cabling group 2212 and the fourth cabling group 2214. Of course, Figure 2AThis is merely one example; the positions of the different wiring groups described above can be interchanged, and this disclosure does not limit this. For example, in the first wiring convergence area L1, the first wiring group 2211 is located between the fifth wiring group 2221 and the third wiring group 2213, or the third wiring group 2213 is located between the first wiring group 2211 and the fifth wiring group 2221. For example, in the second wiring convergence area L2, the second wiring group 2212 is located between the sixth wiring group 2222 and the fourth wiring group 2214, or the fourth wiring group 2214 is located between the second wiring group 2212 and the sixth wiring group 2222.

[0068] By setting up a first wiring convergence area and a second wiring convergence area, the space utilization rate of the first touch wiring and the second touch wiring is improved.

[0069] For example, such as Figure 2A As shown, the touch structure 20 also includes a bonding area B, located below the first trace convergence area L1 and the second trace convergence area L2. The first touch trace 221 and the second touch trace 222 are connected to the bonding area B. For example, the first touch electrode 211 can serve as a signal transmitting channel, and the second touch electrode 212 can serve as a signal receiving channel; alternatively, the second touch electrode 212 can serve as a signal transmitting channel, and the first touch electrode 211 can serve as a signal receiving channel.

[0070] For example, such as Figure 2A As shown, the first touch electrode 211 and / or the second touch electrode 212 can be electrodes formed of a metal mesh, and the materials of the first touch electrode 211 and / or the second touch electrode 212 can be metals, such as silver (Ag), copper (Cu) and titanium, aluminum and titanium three-layer metal stack (Ti / Al / Ti).

[0071] Figure 2B for Figure 2A The enlarged structural diagram of the G region schematically shows the structure at the intersection of the first touch electrode 211 and the second touch electrode 212.

[0072] like Figure 2B As shown, each first touch electrode 211 includes a first touch electrode portion 2111 arranged sequentially and connected in series along the Y direction, and each second touch electrode 212 includes a second touch electrode portion 2121 arranged sequentially and connected in series along the X direction. Figure 2B Only a portion of each of the two first touch electrode sections 2111 and the two second touch electrode sections 2121 is shown. For example... Figure 2A As shown, the outer contours of each first touch electrode portion 2111 and second touch electrode portion 2121 are approximately rhomboid blocks. In other examples, the outer contours of the first touch electrode portion 2111 and the second touch electrode portion 2121 may also be other shapes, such as triangles, stripes, etc.

[0073] like Figure 2B As shown, the touch structure 20 also includes a first connecting portion 2112 and a second connecting portion 2122. The first touch electrode portions 2111 adjacent in the Y direction are electrically connected through the first connecting portion 2112 to form the first touch electrode 211, and the second touch electrode portions 2121 adjacent in the X direction are electrically connected through the second connecting portion 2122 to form the second touch electrode 212.

[0074] Each first touch electrode 211 and each second touch electrode 212 are insulated from each other and cross each other, forming a plurality of touch units 200 at the intersection. Each touch unit 200 includes a portion of each of the two first touch electrode portions 2111 connected at the intersection and at least a portion of each of the two second touch electrode portions 2121 connected at the intersection. Figure 2B An enlarged schematic diagram of a touch unit 200 is shown. (As shown) Figure 2B As shown, each touch unit 200 includes half of each of two adjacent first touch electrode portions 2111 and half of each of two adjacent second touch electrode portions 2121. That is, on average, each includes an area containing one first touch electrode portion 2111 and an area containing one second touch electrode portion 2121. The intersection point of the first touch electrode portion 2111 and the second touch electrode portion 2121 in each touch unit 200 (i.e., the intersection of the first connecting portion and the second connecting portion) forms a reference point for calculating coordinates. When a finger touches the touch display screen containing this touch structure, it affects the coupling between the first and second touch electrodes near the touch point, thereby changing the mutual capacitance between these two electrodes. Based on the capacitance change data of the touch display screen, the coordinates of each touch point can be calculated based on this reference point. For example, the area of ​​each touch unit 200 is comparable to the area of ​​a human finger in contact with the touch panel. If the area of ​​the touch unit is too large, it may cause touch blind spots on the panel; if it is too small, it may cause false touch signals.

[0075] like Figure 2B As shown, the average side length of each touch unit 200 is S, which is called the pitch of the touch structure 20. For example, the pitch S ranges from about 3.7 mm to 5 mm, such as about 4 mm; this is because the diameter of a human finger in contact with the touch panel is about 4 mm. For example, the pitch is the same as the average side length of each first touch electrode portion 2111 and the average side length of each second touch electrode portion 2121, and also the same as the center distance between adjacent first touch electrode portions 2111 and the center distance between adjacent second touch electrode portions 2121.

[0076] For example, such as Figure 2BAs shown, the first touch electrode portion 2111 and the second touch electrode portion 2121 each include a main body portion 241 and a plurality of interdigitated portions 242 protruding from the main body portion 241. The plurality of interdigitated portions 242 of the first touch electrode portion 2111 are insulated from the adjacent plurality of interdigitated portions 242 of the second touch electrode portion 2121 in the same layer and are nested together. In other examples, the edges of the rhomboid block have interdigitated structures, and there are notches on both sides of the interdigitated structures. The notches can be regular or irregular shapes.

[0077] The interdigitated portion 242 can increase the perimeter of the first touch electrode portion 2111 and / or the second touch electrode portion 2121 while maintaining the same area as the touch electrode portion. Therefore, it can effectively increase the mutual capacitance without increasing the self-capacitance (capacitive load) of the first touch electrode portion and / or the second touch electrode portion, thereby improving the touch sensitivity. For example, the shape of the main body portion 241 can be circular or polygonal (e.g., rectangular or rhomboid), and the shape of the interdigitated portion 242 includes at least one of the following shapes: parallelogram (e.g., rectangle), triangle, trapezoid, hexagon, semicircle; that is, the outer contour of the first touch electrode portion and / or the second touch electrode portion can be serrated, wavy, etc.

[0078] For example, multiple interdigitated portions 242 are distributed around the periphery of the main body portion 241 of the first touch electrode portion and / or the second touch electrode portion. For example, the main body portion 241 is rectangular, and the number of interdigitated portions 242 corresponding to each side is 3-10, for example 6-10. In other examples, the main body portion may also be circular, and the multiple interdigitated portions 242 are evenly distributed on the circumference of the circle.

[0079] like Figure 2BAs shown, at least one interdigital portion 242 of the first touch electrode portion 2111 includes a first effective finger electrode 251 and a first dummy finger electrode 252. The first dummy finger electrode 252 is insulated from the first effective finger electrode 251, and the first effective finger electrode 251 is connected to the main body portion 241 of the first touch electrode portion 2111. The first effective finger electrode 251 is the part of the first touch electrode portion 2111 that can be effectively electrically connected and perform an effective detection function. For example, the first dummy finger electrode 252 is located inside the first effective finger electrode 251. For example, the first finger dummy electrode 252 is completely surrounded by the first finger effective electrode 251; or the first finger dummy electrode 252 is partially surrounded by the first finger effective electrode 251. For example, at least one side of the first finger dummy electrode 252 may not be directly adjacent to the first finger effective electrode 251, or at least one side of the first finger dummy electrode 252 may be adjacent to the main body 241 of the first touch electrode portion 2111. For example, the first finger dummy electrode 252 may also be connected to a dummy electrode located in the main body 241 of the first touch electrode portion 2111. This disclosure does not limit this. For example, the first finger dummy electrode 252 and the first finger effective electrode 251 are disposed in the same layer and insulated from each other. This can be considered as the first finger effective electrode 251 having a hollow area, and the first finger dummy electrode 252 being located in the hollow area and spaced apart from the first finger effective electrode 251.

[0080] For example, the first finger dummy electrode 252 and the first finger effective electrode 251 each include multiple metal grids, and the two are insulated from each other through breaks in the metal wires.

[0081] It should be noted that "same-layer configuration" in this disclosure refers to two or more structures formed by the same film layer through the same or different patterning processes, and therefore the materials are the same.

[0082] For example, the first finger portion has a dummy electrode 252 spaced apart from the main body portion 241.

[0083] For example, the first finger dummy electrode 252 is in a floating state, that is, it is not electrically connected to other structures or receives any electrical signals.

[0084] For example, the outer contour of the first finger dummy electrode 252 can be a regular shape (e.g., rectangle, rhombus, etc.) or an irregular shape.

[0085] For example, the outer contour refers to the shape obtained by connecting the ends of the first finger dummy electrode 252 with straight lines.

[0086] This disclosure does not limit the structure of the first touch electrode and the second touch electrode. For example, in some embodiments, the first touch electrode 211 and / or the second touch electrode 212 may also be a pattern formed by connecting multiple rectangular blocks, and the material of the first touch electrode 211 and / or the second touch electrode 212 may be a transparent conductive material, such as ITO.

[0087] In some embodiments, dummy electrodes may also be provided inside the first touch electrode portion 2111 and / or the second touch electrode portion 2121. The dummy electrodes are insulated from both the first touch electrode portion 2111 and the second touch electrode portion 2121 and are disposed in the same layer and made of the same material. The shape, size, and outer contour of the dummy electrodes can be manufactured according to design requirements.

[0088] For example, both the first touch trace 221 and the second touch trace 222 include two layers of conductive traces. The two layers of conductive traces of the first touch trace 221 overlap and are electrically connected, and the two layers of conductive traces of the second touch trace 222 also overlap and are electrically connected. The parallel structure of the first touch trace and the second touch trace through two layers of conductive traces can reduce signal attenuation on the touch traces and improve the touch effect. The following description uses a cross-sectional view of the first touch trace as an example.

[0089] Figure 3 This is a cross-sectional schematic diagram of the first touch traces, showing three first touch traces 221. (See diagram below.) Figure 3 As shown, the touch structure 20 also includes an interlayer dielectric layer 240, located between the two conductive traces of the first touch trace 221. The interlayer dielectric layer 240 includes a plurality of first vias V1, through which the two layers of first touch traces 221 are electrically connected.

[0090] For example, the interlayer dielectric layer 240 can be an inorganic thin film, such as SiN. x SiO x SiC x N y Inorganic oxides, for example, the first via V1 can be a via filled with titanium, aluminum, and a titanium three-layer metal stack (Ti / Al / Ti).

[0091] The cross-sectional structure of the second touch trace is similar to that of the first touch trace. For example, the two layers of second touch traces are respectively disposed on the same layer as the two layers of first touch traces, that is, the interlayer dielectric layer 240 is also located between the two conductive traces of the second touch trace 222. The two layers of second touch traces 222 can also be electrically connected through the first via V1.

[0092] Figure 4 for Figure 2AThe cross-sectional structural diagram at the first side T1 shows the positional relationship between the two layers of first touch traces 221 and the first touch electrode 211 in a direction perpendicular to the touch structure. For example, as... Figure 4 As shown, the touch structure 20 includes a touch grid layer 210 and a bridging layer 230. The grid pattern 2110 of the first touch electrode 211 and the grid pattern 2120 of the second touch electrode 212 are located in the touch grid layer 210. For example, the grid pattern 2110 of the first touch electrode 211 is a strip pattern composed of multiple rectangular grids, along... Figure 2A Extending in the Y direction. For example, combining Figure 2B The first touch electrode 211 has a grid pattern 2110 including a first touch electrode portion 2111. The second touch electrode 212 has a grid pattern 2120 that is a strip pattern composed of multiple rectangular grids, along... Figure 2A Extending in the X direction. For example, combining Figure 2B The grid pattern 2110 of the second touch electrode 212 includes a second touch electrode portion 2121. For example, the rectangular grid of the grid pattern 2110 of the first touch electrode 211 or the grid pattern 2120 of the second touch electrode 212 is broken at the intersection of the first touch electrode 211 and the second touch electrode 212. The bridging layer 230 includes a bridging wire 231, which is configured to electrically connect the grid pattern 2110 of the first touch electrode 211 or the grid pattern 2120 of the second touch electrode 212 at the intersection of the first touch electrode 211 and the second touch electrode 212. For example, the first connection portion 2112 is located in the touch grid layer 210, and the second connection portion 2122 is located in the bridging layer 230. The second connection portion 2122 can serve as a bridging wire 231; or, the second connection portion 2122 is located in the touch grid layer 210, and the first connection portion 2112 is located in the bridging layer 230. The first connection portion 2112 can serve as a bridging wire 231.

[0093] For example, such as Figure 4 As shown, the first touch electrode 211 is disconnected at its intersection with the second touch electrode 212. The bridging layer 230 is provided with a via V. The first touch electrodes 211 located on both sides of the disconnection are electrically connected to the bridging wire 231 through the via V, thereby achieving the bridging function. Alternatively, the second touch electrode 212 can also be disconnected at its intersection with the first touch electrode 211, and the second touch electrodes 212 located on both sides of the disconnection are electrically connected to the bridging wire 231 through the via V.

[0094] For example, such as Figure 4 As shown, the bridging layer 230 is located between the touch mesh layer 210 and the substrate 101. Of course, the bridging layer 230 can also be located on the side of the touch mesh layer 210 away from the substrate 101. This disclosure does not limit this.

[0095] For example, such as Figure 4 As shown, one of the two first touch traces 221 is located on the same layer as the bridging layer 230, and the other is located on the same layer as the touch mesh layer 210.

[0096] By placing the two first touch traces 221 on the touch mesh layer 210 and the bridging layer 230 respectively, it is not necessary to set up more metal layers, thereby reducing the manufacturing process of the touch structure.

[0097] Similarly, the setup of the two-layer second touch trace 222 can also be referenced. Figure 4 One of the two layers of second touch traces 222 is located on the same layer as the bridging layer 230, and the other layer is located on the same layer as the touch mesh layer 210.

[0098] Figure 2A The eight areas R1-R8 of the touch structure 20 are marked. Figures 5-9 These are enlarged structural diagrams of regions R1-R5. Additionally, the structure of R6 can be referenced from R2, the structure of R7 from R5, and the structure of R8 from R4. The embodiments disclosed herein will not be described with accompanying drawings.

[0099] The first via V1 can be set at multiple locations on the first touch trace 221 and the second touch trace 222. For example, Figure 5 , Figure 8 and Figure 9 The locations of some first vias V1 are shown.

[0100] For example, such as Figure 8 As shown, in the extension direction of the first touch trace 221, the first vias V1 between the two layers of conductive traces of the first touch trace 221 are arranged at intervals. In the extension direction of the second touch trace 222, the first vias V1 between the two layers of conductive traces of the second touch trace 222 are arranged at intervals. For example, in the extension direction of either the first touch trace 221 or the second touch trace 222, the distance D between adjacent first vias between the two layers of conductive traces of the first touch trace 221 can be approximately 500-1000 μm, and the distance between adjacent first vias V1 between the two layers of conductive traces of the second touch trace 222 is approximately 500-1000 μm. It should be noted that the upper and lower endpoint values ​​of the distance D are not strictly required to be 500 μm and 1000 μm; for example, the endpoint values ​​of 500 μm and 1000 μm can fluctuate by 10%. In some embodiments, the distance D between adjacent first vias is not limited to about 500-1000 μm in the extending direction of the first touch trace 221 or the second touch trace 222, and its value can be set according to actual needs.

[0101] For example, such as Figure 5 and Figure 8As shown, each first via V1 is a long strip extending along the corresponding touch trace's extension direction. For example, as... Figure 5 and Figure 8 As shown, adjacent first vias V1 located on different touch traces are arranged along a roughly diagonal line that intersects the X and Y directions respectively. This arrangement helps to prevent static electricity from being generated between adjacent first vias.

[0102] For example, such as Figure 9 As shown, for the first touch trace 221 and the second touch trace 222 located in the second trace convergence area L2, only a portion of the first touch trace 221 and the second touch trace 222 are provided with the first via V1. In the second trace convergence area L2, the number and position of the first via V1 can be set according to the spatial position on the touch trace, and this disclosure does not limit this.

[0103] It should be noted that, in Figure 6 In the diagram, the first wiring group 2211 and the second wiring group 2212 each include only one first touch wiring 221. This does not mean that there is only one first wiring group 2211 and the second wiring group 2212 at the first side T1. Rather, it is because along the direction parallel to the first side T1, the ends of multiple first touch wiring 221 near the middle position of the first side T1 are misaligned to a certain extent. R2 is the approximate middle position of the first side T1, so only one first touch wiring 221 is shown here.

[0104] For example, such as Figures 5-9 As shown, the touch structure 20 also includes a shielding line 261 located on the side of the first touch trace 221 and the second touch trace 222 away from the touch area T. For example, the shielding line 261 is arranged around the first touch trace 221 and the second touch trace 222 and is close to the outermost edges of the first touch trace 221 and the second touch trace 222. The shielding line can shield external signal interference to the first touch trace and the second touch trace, thereby improving touch performance.

[0105] For example, such as Figures 5-9 As shown, the touch structure also includes a ground wire 262 located on the side of the shielding wire 261 away from the touch area T. For example, the ground wire 262 is arranged around the first touch trace 221 and the second touch trace 222. For example, multiple ground wires 262 can be provided. For example, in a touch display device including this touch structure 20, the ground wire can be connected to a circuit board located in the bonding area. The ground wire can shield the signal interference of external static electricity to the first touch trace and the second touch trace, thereby improving touch performance.

[0106] For example, such as Figure 6 and Figure 7As shown, the touch structure also includes a dummy line 264. The dummy line 264 can be placed in areas where there are no metal traces.

[0107] This disclosure also provides a touch display substrate in one embodiment. The touch display substrate includes the touch structure 20 provided in any of the above embodiments, and a display substrate 30. The display substrate includes a display area A and a peripheral area P surrounding the display area A. The display area A coincides with the touch area T of the touch structure 20, and the peripheral area P coincides with the peripheral area P of the touch structure 20.

[0108] Figure 10 This is a schematic cross-sectional view of the display area of ​​the touch display substrate. For example, as shown... Figure 10 As shown, the display substrate 30 includes at least one organic light-emitting element 520 and an encapsulation layer 700, and the touch structure 20 is formed on the encapsulation layer 700.

[0109] In organic light-emitting diode (OLED) touch display substrates, the display substrate and touch structure can be integrated together. Therefore, FMLOC (Flexible Multiple Layer On Cell) touch technology has emerged. FMLOC touch technology directly fabricates various electrode layers and traces of the touch structure on the encapsulation layer, thereby integrating the touch structure onto the display substrate. Thus, display devices employing FMLOC touch technology can not only achieve thinner and lighter designs but also realize touch functionality based on flexible displays. For example, the touch display substrate provided in the embodiments of this disclosure includes FMLOC touch technology.

[0110] like Figure 10 As shown, the display substrate 30 includes a substrate 100, which may be a flexible substrate, for example, polyimide (PI), but is not limited thereto.

[0111] For example, such as Figure 10 As shown, each organic light-emitting element 520 has a corresponding switching element to control the organic light-emitting element 520 to turn on or off.

[0112] For example, such as Figure 10 As shown, the switching element is a thin-film transistor 540, located in the pixel driving circuit layer 31. The thin-film transistor 540 includes an active layer 543 on the substrate 100, a gate 544 on the side of the active layer 543 away from the substrate 100, and source and drain electrodes 541 on the side of the gate 544 away from the substrate.

[0113] For example, such as Figure 10 As shown, the display substrate 30 also includes a connection electrode 580. The connection electrode is located between the thin-film transistor and the light-emitting element, and is electrically connected to the source and drain of the thin-film transistor and the light-emitting element, respectively.

[0114] For example, such as Figure 10 As shown, the display substrate 30 also includes a power line 550, electrically connected to the anode 522 or cathode 523, for providing a driving voltage to the electroluminescent layer. For example, the power line 550 may be located on the same layer as the connecting electrode 580.

[0115] For example, such as Figure 10 As shown, the organic light-emitting element 520 is located on the side of the thin-film transistor 540 away from the substrate 100. Each organic light-emitting element 520 includes an anode 522, an electroluminescent layer 521, and a cathode 523 stacked along a direction perpendicular to the substrate. The electroluminescent layer 521 is located between the anode 522 and the cathode 523 and can emit light under the combined action of the anode and cathode. For example, the anodes 522 of each light-emitting element are insulated from each other. The cathodes 523 of each light-emitting element are interconnected to form a continuous cathode layer. For example, the anode 522 can serve as a pixel electrode, so that the brightness of each light-emitting element can be independently controlled for display.

[0116] For example, such as Figure 10 As shown, in a direction perpendicular to the substrate, the first touch electrode 211 and the second touch electrode 212 at least partially overlap with the cathode 523. Thus, the cathode 523 can shield the pixel driving circuit layer 31 from signal interference to the touch electrodes, thereby improving touch performance.

[0117] For example, such as Figure 10 As shown, the active layer of the thin-film transistor 540 includes a source region and a drain region, as well as a channel region located between the source and drain regions. The thin-film transistor 540 includes source and drain electrodes 541, which are electrically connected to the source and drain regions through vias, respectively. The gate electrode overlaps with the channel region located between the source and drain regions in the active layer in a direction perpendicular to the substrate 100.

[0118] For example, such as Figure 10 As shown, the display substrate 30 also includes a first planarization layer 570, which is located above the source / drain electrodes 541 and is used to planarize the surface of the thin-film transistor away from the substrate. A connection electrode 580 is formed on the first planarization layer 570, and in a direction perpendicular to the substrate, the connection electrode 580 overlaps with the anode 522.

[0119] For example, such as Figure 10As shown, the display substrate 30 further includes a second planarization layer 590, which is located between the anode 522 and the connection electrode 580, and is used to planarize the surface of the connection electrode 580 away from the substrate. The connection electrode 580 is electrically connected to the source / drain electrode 541 through a via, and the anode 522 is electrically connected to the connection electrode 580 through a via, thereby realizing the electrical connection between the anode 522 and the source / drain electrode 541. The connection electrode can avoid forming a large-diameter through-hole directly in the first and second planarization layers, thereby improving the quality of the via electrical connection.

[0120] For example, such as Figure 10 As shown, the display substrate 30 further includes a first buffer layer 130 located between the substrate 100 and the active layer 543. The display substrate also includes a passivation layer 620 located between the first planarization layer 570 and the source / drain electrodes 541.

[0121] In some embodiments, the display substrate 30 may not include the connection electrode 580 and the second planarization layer 590, and the anode 522 and the source / drain electrode 541 may be electrically connected through vias. In some embodiments, the display substrate 30 may not include the passivation layer 620.

[0122] For example, the material of anode 522 may include at least one transparent conductive oxide material, including indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), etc. Furthermore, anode 522 may include a metal with high reflectivity as a reflective layer, such as silver (Ag).

[0123] For example, the material of the electroluminescent layer 521 may include small molecule organic materials or polymer molecule organic materials, and may be fluorescent luminescent materials or phosphorescent luminescent materials, and may emit red light, green light, blue light, or white light; and, as needed, the electroluminescent layer may further include functional layers such as an electron injection layer, an electron transport layer, a hole injection layer, and a hole transport layer.

[0124] For example, cathode 523 may include various conductive materials. For example, cathode 523 may include metallic materials such as lithium (Li), aluminum (Al), magnesium (Mg), and silver (Ag).

[0125] For example, such as Figure 10 As shown, the display substrate 30 also includes an encapsulation layer 700 covering the organic light-emitting element 520. The encapsulation layer 700 seals the organic light-emitting element 520, thereby reducing or preventing degradation of the organic light-emitting element 520 caused by moisture or oxygen present in the environment. The encapsulation layer 700 can be a single-layer structure or a composite layer structure, which includes a structure of stacked inorganic and organic layers. For example, as... Figure 10As shown, the encapsulation layer 700 includes a first inorganic encapsulation layer 710, an organic encapsulation layer 720, and a second inorganic encapsulation layer 730 stacked sequentially.

[0126] For example, the materials of the first and second inorganic encapsulation layers may include insulating materials such as silicon nitride, silicon oxide, silicon oxynitride, and polymer resins. Inorganic materials such as silicon nitride, silicon oxide, and silicon oxynitride have high density, which can prevent the intrusion of water, oxygen, etc.; the materials of the organic encapsulation layers may be polymer materials containing desiccants or polymer materials that can block moisture, such as polymer resins, to planarize the surface of the display substrate and relieve stress in the first and second inorganic encapsulation layers. They may also include water-absorbing materials such as desiccants to absorb water, oxygen, and other substances that have penetrated the interior.

[0127] For example, the first inorganic encapsulation layer and the second inorganic encapsulation layer can be fabricated using chemical vapor deposition (CVD), while the organic encapsulation layer can be fabricated using inkjet printing (IJP).

[0128] For example, such as Figure 10 As shown, the display substrate 30 also includes a second buffer layer 740, located on the side of the second inorganic encapsulation layer 730 away from the substrate 100.

[0129] For example, such as Figure 10 As shown, the display substrate further includes an insulating layer 750 located on the side of the second buffer layer 740 away from the substrate 100. For example, the insulating layer 750 may be a silicon nitride layer. The insulating layer 750 may serve a planarization function. In some embodiments, the display substrate does not include the insulating layer 750.

[0130] For example, such as Figure 10 As shown, the display substrate also includes a protective layer 800 located on the side of the touch structure 20 away from the substrate 100. The protective layer 800 serves to protect the touch structure 20.

[0131] It should be noted that the above combination Figure 10 The structure of the display substrate described is exemplary, and the touch structure of the present disclosure embodiment can be formed on any suitable type of display substrate to form a touch display substrate.

[0132] Figure 11 This is a schematic diagram of the circuit principle of the display substrate. (For example...) Figure 11 As shown, the display substrate 30 includes a plurality of display devices L (i.e., ...) located in the display area A. Figure 10The display substrate includes an organic light-emitting element 520 and pixel circuits 110 coupled one-to-one with each display device L. Each pixel circuit 110 includes a driving transistor. The display substrate may also include multiple voltage control circuits 120 located in the peripheral region P. For example, at least two pixel circuits 110 in a row share a single voltage control circuit 120, and the first terminal of the driving transistor in each row of pixel circuits 110 is coupled to the shared voltage control circuit 120, while the second terminal of each driving transistor is coupled to the corresponding display device L. The voltage control circuit 120 is configured to output an initialization signal Vinit to the first terminal of the driving transistor in response to a reset control signal RE, thereby resetting the corresponding display device L; and to output a first power supply signal VDD to the first terminal of the driving transistor in response to a light emission control signal EM, thereby driving the display device L to emit light. The display substrate may also include a second power supply signal VSS located in the display area, used to input the second power supply signal to the display device L. It should be noted that the reset control signal RE corresponding to each voltage control circuit 120 is not entirely the same, and the light emission control signal EM corresponding to each voltage control circuit 120 is also not entirely the same. By using a shared voltage control circuit 120, the structure of each pixel circuit in display area A can be simplified, reducing the area occupied by the pixel circuits in display area A. This allows for the placement of more pixel circuits and display devices in display area A, achieving a high PPI organic light-emitting display substrate. Furthermore, under the control of the reset control signal RE, the voltage control circuit 120 outputs an initialization signal Vinit to the first terminal of the driving transistor, controlling the corresponding display device to reset. This avoids the influence of the voltage applied to the display device during the previous frame's illumination on the illumination of the next frame, thereby improving the ghosting phenomenon.

[0133] For example, combining Figure 10 and Figure 11 The first power signal VDD passes through Figure 10 The source / drain 541 of the thin-film transistor 540 shown is transmitted to the anode 522 of the organic light-emitting element 520, and the second power supply signal VSS is transmitted through... Figure 10 The power line 550 shown is transmitted to the cathode 523 of the organic light-emitting element 520.

[0134] Figure 12 This is a schematic diagram of the planar structure of the touch display substrate. (For example...) Figure 12 As shown, the touch display substrate also includes a bonding area B, located on the side of the second side T2 away from the touch area T. The first touch trace 221 and the second touch trace 222 are connected to the bonding area B after converging in the first trace convergence area L1 and the second trace convergence area L2, respectively.

[0135] For example, such as Figure 12As shown, the bonding area B includes a touch driver chip 40. A first touch trace 221 and a second touch trace 222 are connected to the touch driver chip 40 located in the bonding area B. For example, the touch driver chip 40 includes multiple pins, each pin corresponding to a contact pad, and the first touch trace 221 and the second touch trace 222 are connected to the touch driver chip 40 through the contact pads.

[0136] For example, such as Figure 12 As shown, the touch display substrate is a bendable display substrate, and also includes a bendable area C located between the touch area T and the bonding area B, or, along the Y direction, the bendable area C is located between the first wiring convergence area L1 and the second wiring convergence area L2 and the bonding area B.

[0137] For example, such as Figure 12 As shown, the touch display substrate also includes a trace transition region F, located between the bendable region C and the bonding region B. For example, the routing direction of the first touch trace 221 and the second touch trace 222 in the trace transition region F may be changed to connect with the pins of the touch driver chip 40 located in the bonding region. For example, in the trace transition region F, the angle α between the extension direction of the first touch trace 221 and the second touch trace 222 and the X direction is related to the dimension of the touch display substrate along the X direction, the dimension of the touch driver chip 40, and its relative position to the touch display substrate. For example, in one example, the value of the angle α ranges from 30° to 90°.

[0138] Figure 13 This is a magnified view of a portion of the bendable region C. Figure 14 For the bendable area Figure 13 A schematic diagram of the cross-sectional structure along the EE direction. (See attached diagram.) Figure 14 As shown, the bendable area C does not include the first touch trace 221 and the second touch trace 222; in other words, the first touch trace 221 and the second touch trace 222 are disconnected at the bendable area C. For example, as... Figure 14As shown, the first touch trace 221 is disconnected in the bendable area C, forming a first end 221a near the touch area T and a second end 221b near the bonding area B. The second touch trace 222 is disconnected in the bendable area C, forming a first end 222a near the touch area T and a second end 222b near the bonding area B. The bendable area C includes a first metal connection portion 5410 and a second via V2 located on different layers from the first touch trace 221 and the second touch trace 222. The first metal connection portion 5410 includes multiple metal traces. The first end 221a of each first touch line 221 and the first end 222a of each second touch line 222 are electrically connected to a metal line of the first metal connection portion 5410 through a second via V2 on the side of the bendable area C near the touch area T (i.e., the side near the first line convergence area L1). The second end 221b of each first touch line 221 and the second end 222b of each second touch line 222 are electrically connected to a metal line of the first metal connection portion 5410 through a second via V2 on the side of the bendable area C near the binding area B.

[0139] Figure 14 The diagram shows two layers of conductive traces of the first touch trace 221 with the same length at the first end 221a and the second end 221b. The second via V2 is electrically connected to the conductive trace located on the lower layer. However... Figure 14 This is merely one example, and the embodiments disclosed herein are not limited thereto. For example, such as Figure 15 As shown, at the first end 221a and the second end 221b of the first touch trace 221, the conductive trace in the upper layer of the two conductive traces of the first touch trace 221 extends beyond the conductive trace in the lower layer, and the second via V2 is electrically connected to the conductive trace in the upper layer.

[0140] When bent, stress concentration will occur inside the bendable area C. This design avoids setting the first touch trace 221 and the second touch trace 222 in the bendable area C, thereby preventing the first touch trace 221 and the second touch trace 222 from breaking in the bendable area C and improving the touch stability of the touch display substrate.

[0141] For example, Figure 14 and Figure 15 The touch display substrate also includes a dam 900 disposed in the peripheral area P. For example, the dam 900 can be made of... Figure 10 The first planarization layer 570, the second planarization layer 590, and the pixel defining layer 510 shown are stacked together. The dam 900 can be set around the touch area T (i.e., the display area) to prevent the organic light-emitting material in the display area from flowing out. The first touch trace 221 and the second touch trace 222 can cross the dam 900 from the touch area T and connect to the bendable area C.

[0142] For example, such as Figure 14 and Figure 15 As shown, the first metal connection portion 5410 and the source / drain electrode 541 of the thin-film transistor are located on the same layer, but the first metal connection portion 5410 and the source / drain electrode 541 of the thin-film transistor are not connected. In this way, the number of metal layers in the touch display substrate can be reduced, thereby saving manufacturing process.

[0143] For example, the bendable region C includes a second metal connection portion 5440 and a third via V3 located on a different layer from the first metal connection portion 5410. For example, the second metal connection portion 5440 is located on the same layer as the gate 544 of the thin-film transistor, but the second metal connection portion 5440 is not connected to the gate 544 of the thin-film transistor. Figure 14 As shown, in the bendable region C, the first metal connector 5410 is broken into two parts at a position corresponding to the second metal connector 5440. The two broken parts of the first metal connector 5410 are electrically connected to the second metal connector 5440 through a third via V3. For example, the second metal connector 5440 also includes multiple metal traces, which correspond one-to-one with and are electrically connected to the multiple metal traces of the first metal connector 5410. This arrangement reduces stress concentration within the bendable region C, thereby improving the lifespan of the touch display substrate.

[0144] For example, such as Figure 14 and Figure 15 As shown, the first metal connection portion 5410 includes an opening 5411 perpendicular to the layer in which the first metal connection portion 5410 is located. By providing the opening 5411 in the first metal connection portion 5410, the thickness of the first metal connection portion 5410 located in the bendable region C can be reduced, thereby further reducing stress concentration inside the bendable region C and improving the service life of the touch display substrate.

[0145] like Figure 14 and Figure 15 As shown, at least a portion of the power line 550 of the touch display substrate is located in the trace transition region F. In a direction perpendicular to the substrate 100, the first touch trace 221 and the second touch trace 222 overlap with at least a portion of the power line 550 located in the trace transition region F. This arrangement reduces signal interference from the pixel driving circuit layer through the power line 550, thereby improving the touch performance of the touch display substrate.

[0146] For example, such as Figure 5 , Figure 6 , Figure 8 and Figure 9As shown, the touch display substrate also includes a detection line 263 located on the side of the ground line 262 away from the touch area T. For example, the detection line 263 is arranged around the first touch trace 221 and the second touch trace 222. The detection line can be connected to a circuit board located in the bonding area. The detection line is used to detect cracks generated in the touch display substrate.

[0147] One embodiment of this disclosure also provides a touch display device, including the touch display substrate provided in any of the above embodiments.

[0148] In embodiments of this disclosure, the touch display device includes, but is not limited to, an FMLOC touch display substrate. The touch display device can be a liquid crystal display, electronic paper, an OLED (Organic Light-Emitting Diode) display, or any product or component with touch and display functions, including such display devices as televisions, digital cameras, mobile phones, watches, tablets, laptops, navigators, etc.

[0149] An embodiment of this disclosure also provides, as follows: Figure 2A The manufacturing method of the touch structure shown. (Reference) Figure 2A and Figure 4 The manufacturing method includes forming a touch structure 20 on a substrate 101. The touch structure 20 includes a touch area T and a peripheral area P surrounding the touch area T. The touch area T includes opposing first sides T1 and T2, and opposing third sides T3 and T4. The touch structure 20 also includes a first touch electrode 211 and a second touch electrode 212 that intersect and are insulated from each other, located in the touch area T. The touch structure 20 also includes a first touch trace 221 and a second touch trace 222 located in the peripheral area P. The first touch trace 221 is connected to the first touch electrode 211 at the first side T1 and the second side T2, respectively; the second touch trace 222 is connected to the second touch electrode 212 at the third side T3 and the fourth side T4, respectively.

[0150] For example, in some examples, the first touch trace 221 and the second touch trace 222 of the touch structure 20 both include two layers of conductive traces. The two layers of conductive traces of the first touch trace 221 overlap and are electrically connected, and the two layers of conductive traces of the second touch trace 222 overlap and are electrically connected.

[0151] At this time, forming the touch structure 20 on the substrate 101 includes:

[0152] S10: A bridging layer 230 is formed on the substrate 101. The bridging layer 230 includes a layer of conductive traces, including a bridging line 231, a first touch trace 221, and a second touch trace 222.

[0153] S20: An interlayer dielectric layer 240 is formed on the bridging layer 230. The interlayer dielectric layer 240 includes a plurality of first vias V1.

[0154] S30: A touch grid layer 210 is formed on the interlayer dielectric layer 240. The touch grid layer 210 includes a grid pattern of a first touch electrode 211 and a second touch electrode 212, as well as another layer of conductive traces of a first touch trace 221 and a second touch trace 222. The grid pattern 2110 of the first touch electrode 211 or the grid pattern 2120 of the second touch electrode 212 is electrically connected by a bridging wire 231, the conductive traces of the two layers of first touch traces 221 are electrically connected by a first via V1, and the conductive traces of the two layers of second touch traces 222 are electrically connected by a first via V1.

[0155] For example, for such Figure 10 The OLED touch display substrate shown can have a substrate 101 that can be an encapsulation layer 700.

[0156] It should be noted that the formation order of the bridging layer 230 and the touch mesh layer 210 can be interchanged. That is, the touch mesh layer 210 can be formed on the substrate 101 first, and then the bridging layer 230 can be formed on the substrate 101.

[0157] For example, refer to Figure 10 The manufacturing method further includes forming an insulating layer 750 on the substrate 101 before forming a bridging layer 230 on the substrate 101.

[0158] For example, refer to Figure 10 The manufacturing method described above also includes forming a protective layer 800 on the touch grid layer 210.

[0159] The manufacturing method of the touch structure provided in this disclosure can be used to manufacture the touch structure provided in any of the above embodiments.

[0160] The following points need to be explained:

[0161] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0162] (2) Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0163] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1.A touch structure, comprising: a touch area and a peripheral area surrounding the touch area, the touch area comprising opposite first and second edges, and opposite third and fourth edges; first and second touch electrodes crossing each other and insulated from each other, located in the touch area; and first and second touch wires, located in the peripheral area, wherein the first touch wires are connected to the first touch electrodes at the first and second edges respectively, and the second touch wires are connected to the second touch electrodes at the third and fourth edges respectively, the touch structure further comprising a first wire gathering area and a second wire gathering area, the first and second wire gathering areas being located on a side of the second edge away from the first edge, and in an extending direction of the second edge, the first and second wire gathering areas being located between the third and fourth edges, and the second wire gathering area being located on a side of the first wire gathering area away from the third edge, the first wire gathering area being located between an end of the second edge close to the third edge and a substantially middle position of the second edge, and the second wire gathering area being located between an end of the second edge close to the fourth edge and a substantially middle position of the second edge, part of the first touch wires and part of the second touch wires extending to the first wire gathering area, and another part of the first touch wires and another part of the second touch wires extending to the second wire gathering area, the first touch wires comprising: a first wire group and a second wire group connected to the first touch electrodes at the first edge, the first and second wire groups being separated at a substantially middle position of the first edge, the first wire group extending from a side of the third edge to the first wire gathering area, and the second wire group extending from a side of the fourth edge to the second wire gathering area; and a third wire group and a fourth wire group connected to the first touch electrodes at the second edge, the third and fourth wire groups being separated at a substantially middle position of the second edge, the third wire group extending to the first wire gathering area, and the fourth wire group extending to the second wire gathering area, a part of the first touch wires in the third wire group extending to the first wire gathering area in a direction pointing from the fourth edge to the third edge, and another part of the first touch wires in the third wire group extending to the first wire gathering area in a direction pointing from the third edge to the fourth edge, and a part of the first touch wires in the fourth wire group extending to the second wire gathering area in a direction pointing from the third edge to the fourth edge, and another part of the first touch wires in the fourth wire group extending to the second wire gathering area in a direction pointing from the fourth edge to the third edge. The first touch wire and the second touch wire each comprise two layers of conductive wires, the two layers of conductive wires of the first touch wire are overlapped and electrically connected with each other, the two layers of conductive wires of the second touch wire are overlapped and electrically connected with each other, the touch structure further comprises an interlayer dielectric layer located between the two layers of conductive wires of the first touch wire and between the two layers of conductive wires of the second touch wire, the interlayer dielectric layer comprises a plurality of first vias, the two layers of conductive wires of the first touch wire are electrically connected through the first vias, the two layers of conductive wires of the second touch wire are electrically connected through the first vias, adjacent first vias located on different first touch wires are arranged along a diagonal line, adjacent first vias located on different second touch wires are arranged along a diagonal line, and the diagonal lines intersect the directions in which the first edge and the second edge are located, respectively. 2.The touch structure according to claim 1, wherein, The second touch wire comprises: a fifth wire group connected with the second touch electrode at the third edge, the fifth wire group extending from one side where the third edge is located to the first wire converging area; and a sixth wire group connected with the second touch electrode at the fourth edge, the sixth wire group extending from one side where the fourth edge is located to the second wire converging area. 3.The touch structure according to claim 2, wherein, In the first wire converging area, the fifth wire group is located between the first wire group and the third wire group; in the second wire converging area, the sixth wire group is located between the second wire group and the fourth wire group. 4.The touch structure according to claim 1, wherein, An interval between the first wire converging area and the second wire converging area is not provided with the first touch wire and the second touch wire. 5.The touch structure according to claim 4, wherein, Each first via is in the shape of a long strip along the extension direction of the corresponding first touch wire or second touch wire. 6.The touch structure according to claim 5, wherein, In the extension direction of the first touch wire or the second touch wire, the first vias located between the two layers of conductive wires of the first touch wire are arranged at intervals, and the first vias located between the two layers of conductive wires of the second touch wire are arranged at intervals. 7.The touch structure according to claim 6, wherein, In the extension direction of the first touch wire or the second touch wire, the distance between adjacent first vias located between the two layers of conductive wires of the first touch wire is 500-1000 μm, and the distance between adjacent first vias located between the two layers of conductive wires of the second touch wire is 500-1000 μm. 8.The touch structure according to claim 5, wherein, The first touch electrode and the second touch electrode comprise a grid pattern located at a touch grid layer and a bridge line located at a bridge layer, the bridge line is configured to electrically connect the grid pattern of the first touch electrode or the grid pattern of the second touch electrode at the intersection of the first touch electrode and the second touch electrode, one of the two layers of conductive wires of the first touch wire is located at the bridge layer, and the other is located at the touch grid layer; one of the two layers of conductive wires of the second touch wire is located at the bridge layer, and the other is located at the touch grid layer. 9.The touch structure of claim 1, further comprising a shielding line located on a side of the first touch trace and the second touch trace away from the touch area. 10.The touch structure of claim 9, further comprising a ground line located on a side of the shielding line away from the touch area. 11.A touch display substrate, comprising the touch structure according to any one of claims 1-10, and a display substrate, wherein, The display substrate comprises an organic light emitting element and an encapsulation layer, and the touch structure is located on the encapsulation layer. 12.The touch display substrate of claim 11, further comprising a binding area located on a side of the second edge away from the touch area, and the first touch trace and the second touch trace are connected to the binding area. 13.The touch display substrate of claim 12, further comprising a bendable area located between the touch area and the binding area, wherein at least one of the first touch trace and the second touch trace is disconnected in the bendable area to form a first end close to the touch area and a second end close to the binding area, the bendable area comprises a first metal connection and a second via located in different layers from the first touch trace and the second touch trace, the first end and the second end are connected to the first metal connection and the second via respectively, and the first metal connection is located on a side of the first touch trace and the second touch trace close to the display substrate. 14.The touch display substrate of claim 13, further comprising a pixel driving circuit layer, the pixel driving circuit layer comprises a thin film transistor, the thin film transistor comprises a source / drain and a gate, and the first metal connection is located in the same layer as the source / drain of the thin film transistor. 15.The touch display substrate of claim 14, wherein, The bendable area comprises a second metal connection and a third via located in different layers from the first metal connection, the second metal connection is located in the same layer as the gate of the thin film transistor, in the bendable area, the first metal connection is disconnected into two parts at a position corresponding to the second metal connection, and the two parts of the first metal connection are electrically connected to the second metal connection through the third via respectively. 16.The touch display substrate of claim 13, wherein, The first metal connection comprises an opening along a layer perpendicular to the layer where the first metal connection is located. 17.The touch display substrate of claim 13, wherein, The organic light emitting element comprises an anode, an electroluminescent layer and a cathode which are sequentially stacked, and the first touch electrode and the second touch electrode at least partially overlap with the cathode. 18.The touch display substrate of claim 17, further comprising: a trace transition area located between the bendable area and the binding area; a power line electrically connected to the anode or the cathode, and at least part of the power line is located in the trace transition area, and the first touch trace and the second touch trace overlap with at least part of the power line located in the trace transition area. 19.The touch display substrate of claim 11, further comprising a detection line, wherein the touch structure further comprises a shielding line and a ground line, the shielding line is located on a side of the first touch trace and the second touch trace away from the touch area, the ground line is located on a side of the shielding line away from the touch area, and the detection line is located on a side of the ground line away from the touch area. 20.A touch display device, comprising the touch display substrate of any one of claims 11-19.

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