Touch substrate and display apparatus

Abstract

A touch substrate and a display apparatus. The touch substrate comprises a touch conductive layer, the touch conductive layer comprises first touch electrodes (10) and second touch electrodes (20) which are located in a touch area, the second touch electrodes (20) arranged in a first direction are connected to each other, and the first touch electrodes arranged in a second direction are connected to each other. Each of the first touch electrodes (10) comprises a first pattern portion (11) and a second pattern portion (12) which are arranged in the second direction and are symmetrical to each other, the first pattern portion (11) comprises a first main portion (111) and a first branch portion (112), the first main portion (111) is in a zigzag shape or a curved shape, and the first branch portion (112) extends away from the first main portion. Each of the second touch electrodes (20) comprises a second main portion (21) arranged on the periphery of the corresponding first touch electrode and a second branch portion (22) connected to the second main portion, and the second branch portion (22) extends from the second main portion (21) towards the first touch electrode (10) and is inserted into a gap area of the first touch electrode (10).

Description

Touch board and display device

[0001] This application claims priority to Chinese Patent Application No. 202410536418.8, filed on April 29, 2024, entitled "Touch Substrate and Display Device", the contents of which are to be understood as incorporated herein by reference. Technical Field

[0002] This disclosure relates to, but is not limited to, the field of display technology, and in particular to a touch substrate and a display device. Background Technology

[0003] Currently, with continuous innovation in terminal devices, touch-enabled devices such as mobile phones and wearables can achieve fast and sensitive human-computer interaction experiences, and are therefore widely used. Common touch structures include single-solution, on-cell, and in-cell.

[0004] Improving touch performance to achieve a better human-computer interaction experience is a problem that terminal devices need to continuously improve.

[0005] Summary of the Invention

[0006] The following is an overview of the subject matter described in detail in this disclosure. This overview is not intended to limit the scope of the claims.

[0007] An exemplary embodiment of this disclosure provides a touch substrate, including:

[0008] The substrate has multiple touch areas arranged in an array.

[0009] A touch conductive layer is located on one side of a substrate. The touch conductive layer includes a first touch electrode located in a touch area and a second touch electrode located in a touch area. A plurality of second touch electrodes arranged along a first direction are interconnected, and a plurality of first touch electrodes arranged along a second direction are interconnected. The first direction and the second direction intersect.

[0010] The first touch electrode includes a first patterned portion and a second patterned portion arranged and electrically connected along the second direction. The first patterned portion and the second patterned portion are symmetrical to each other. The first patterned portion includes a first main body and a first branch. The shape of the first main body is a broken line shape or a curve shape. The first branch extends from the first main body in a direction away from the first main body.

[0011] The second touch electrode includes a second stem part arranged along the periphery of the first touch electrode, and a second branch part connected to the second stem part, the second branch part extending from the second stem part towards the first touch electrode and being arranged in a gap region of the first touch electrode, the gap region including a region between adjacent first branch parts and a region between the first stem part and the first branch parts.

[0012] In some example embodiments, the first stem part has a shape of a zigzag line, and the first branch part extends perpendicularly from the first stem part towards a direction away from the first stem part.

[0013] In some example embodiments, the first stem part has a shape of a "W", and the first stem part in the first pattern part is arranged opposite to the first stem part in the second pattern part.

[0014] In some example embodiments, the first branch part includes a first sub-branch, and the second branch part includes a second sub-branch, the second sub-branch being parallel and adjacent to the first sub-branch, and the width of the second sub-branch being different from the width of the first sub-branch.

[0015] In some example embodiments, the second sub-branch and the first sub-branch are both rectangular strips.

[0016] In some example embodiments, the second stem part includes a first stem segment, the first stem segment being located at one side of the first pattern part and extending along the second direction, the first stem part has a shape of a zigzag line, the first sub-branch extends in a direction perpendicular to a starting segment of the first sub-branch, the second sub-branch extends from the first stem segment towards the starting segment of the first sub-branch, and the starting segment of the first sub-branch is a part of the first stem part connected to the first sub-branch.

[0017] In some example embodiments, the second stem part includes a first stem segment, the first stem segment being located at one side of the first pattern part and extending along the second direction, the first touch electrode further includes a first block part connected to an end of the first stem part, the first block part being located between the first stem segment and the first stem part, an edge of the first block part parallel to an inner edge of the first stem segment is provided with a first matching structure, the inner edge of the first stem segment is provided with a second matching structure, and the first matching structure and the second matching structure are matched.

[0018] In some example embodiments, one of the first matching structure and the second matching structure is a protrusion, and the other is a recess.

[0019] In some example embodiments, the first stem portion comprises two first sub-stem portions arranged and connected along the first direction, the first sub-stem portions are in a "V" shape, the two first touch electrodes are connected through the first connecting portion, the first connecting portion is located between two second touch electrodes adjacent in the second direction, and a maximum dimension of the first connecting portion in the first direction is greater than a distance between the tips of the two first sub-stem portions in the first direction.

[0020] In some example embodiments, the second stem portion comprises a first stem segment, the first stem segment is located at one side of the first pattern portion and extends along the second direction, the second touch electrode comprises two first stem segments, the two first stem segments are located at the same side of the first pattern portion and the second pattern portion, the two first stem segments are connected through a second stem segment, the second stem segment is in a shape of a fold line bending towards the center of the touch area, and two second touch electrodes adjacent in the first direction are connected through the first stem segment.

[0021] In some example embodiments, the substrate includes a base and a pixel defining layer disposed at one side of the base, the pixel defining layer is provided with a plurality of openings, the openings are provided with light emitting devices, the first touch electrode comprises a plurality of first conductive line segments connected to each other, a projection of the first conductive line segments on the base is located between adjacent openings, and the second touch electrode comprises a plurality of second conductive line segments connected to each other, a projection of the second conductive line segments on the base is located between adjacent openings.

[0022] In some example embodiments, the second touch electrode further comprises an extension portion located in the middle of the touch area and disposed in the gap region of the first touch electrode, the second stem portion comprises a first portion and a second portion located at two sides of the extension portion along the first direction, the first portion and the second portion are symmetrically disposed, and the first portion and the second portion are connected through the extension portion.

[0023] The first stem portion comprises two first sub-stem portions arranged and connected along the first direction, the first sub-stem portions are in a "V" shape, the extension portion comprises a filling block portion located between the two first sub-stem portions, the filling block portion comprises a first sub-edge parallel to an edge of one of the two first sub-stem portions and a second sub-edge parallel to an edge of the other of the two first sub-stem portions, a first step edge is disposed at a position of the first sub-edge close to the second sub-edge, a second step edge is disposed at a position of the second sub-edge close to the first sub-edge, a distance L1 between an edge portion of the first step edge and an edge of the corresponding first sub-stem portion is greater than a distance L2 between the first sub-edge and the edge of the corresponding first sub-stem portion, and a distance L3 between an edge portion of the second step edge and an edge of the corresponding first sub-stem portion is greater than a distance L4 between the second sub-edge and the edge of the corresponding first sub-stem portion.

[0024] In some example embodiments, L1 is equal to L3, L2 is equal to L4, L2 is equal to the size of the opening, and L1 = 2*L2;

[0025] The length of the edge portion of the first step edge is 4 times the size of the opening, and the length of the edge portion of the second step edge is 3 times the size of the opening.

[0026] In some example embodiments, the second stem portion includes a second stem segment located between the first pattern portion and the second pattern portion and located outside the middle of the touch control region, the second stem segment is in the shape of a fold line that bends towards the center of the touch control region, the second branch portion includes a third sub-branch, the third sub-branch extends from the second stem segment towards the inside and inserts into the gap region of the first touch control electrode, and the depth of insertion is greater than or equal to 3 times the size of the opening.

[0027] In some example embodiments, the first touch control electrode and the second touch control electrode are both patterns that are symmetrical about a second central axis of the touch control region and are both patterns that are symmetrical about a first central axis of the touch control region, the second central axis is a central axis that is parallel to the second direction, and the first central axis is a central axis that is parallel to the first direction.

[0028] In some example embodiments, the touch control conductive layer includes a first conductive layer, a second conductive layer, and a touch control insulating layer located between the first conductive layer and the second conductive layer, the first conductive layer includes the first touch control electrode and the second touch control electrode, the second conductive layer includes a bridge electrode, and the first pattern portion and the second pattern portion are connected by the bridge electrode.

[0029] The example embodiments of the present disclosure provide a display device including the touch control substrate of any of the above embodiments of the present disclosure.

[0030] Other aspects can become apparent after reading and understanding the accompanying drawings and detailed description.

[0031] SUMMARY

[0032] FIG. 1 is a schematic diagram of a touch control principle;

[0033] FIG. 2 is a partial schematic diagram of a touch control substrate in an example embodiment of the present disclosure;

[0034] FIG. 3 is a schematic diagram of one touch control region in FIG. 2;

[0035] FIG. 4 is an enlarged schematic diagram of region A in FIG. 3, where region A is schematically shown by a blue dashed oval in FIG. 3;

[0036] FIG. 5 is an enlarged schematic diagram of region A without application of the technology of the present disclosure;

[0037] FIG. 6 is an enlarged schematic diagram of region B in FIG. 3, where region B is schematically shown by a white dashed square in FIG. 3;

[0038] FIG. 7 is an enlarged schematic view of the B region without application of the technology disclosed herein;

[0039] FIG. 8 is an enlarged schematic view of the C portion in FIG. 3, in which the A2 region is schematically shown by a blue dashed oval;

[0040] FIG. 9 is an enlarged schematic view of the C portion without application of the technology disclosed herein;

[0041] FIG. 10 is a plan view of a touch substrate;

[0042] FIG. 11 is a partial view of a lower left corner region in FIG. 10;

[0043] FIG. 12 is an enlarged schematic view of a position of the filling block portion 231 in FIG. 3;

[0044] FIG. 13 is an enlarged schematic view of the position of the filling block portion 231 without application of the technology disclosed herein;

[0045] FIG. 14 is an enlarged schematic view of a D region in FIG. 3;

[0046] FIG. 15 is an enlarged schematic view of the D region without application of the technology disclosed herein;

[0047] FIG. 16 is a cross-sectional view of a touch substrate in an exemplary embodiment of the technology disclosed herein;

[0048] FIG. 17 is a cross-sectional view of E-E in FIG. 2 in an exemplary embodiment.

[0049] DETAILED DESCRIPTION

[0050] The specific embodiments of the present disclosure will be further described with reference to the drawings and examples. The following examples are used to illustrate the present disclosure and are merely exemplary, but are not used to limit the scope of the present disclosure. The embodiments in the present disclosure and the features in the examples can be combined with each other arbitrarily without conflict.

[0051] In the following, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present disclosure, and different embodiments can be combined arbitrarily without conflict. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0052] In an organic light-emitting diode (OLED) display panel, a touch function layer is integrated in a thin film encapsulation layer of the OLED panel, and the touch function layer is prepared on the thin film encapsulation layer by a semiconductor process to achieve flexible, thin, and other physical properties.

[0053] Figure 1 is a schematic diagram of a touch control principle. In the touch control functional layer, a driving module, a plurality of driving poles (Tx), a detecting module, a plurality of detecting poles (Rx), a blank area (Dummy), etc. are arranged. The plurality of detecting poles arranged along a first direction (X direction) are connected to each other, i.e. the plurality of detecting poles connected to each other extend along the first direction X. The plurality of driving poles arranged along a second direction (Y direction) are connected to each other, i.e. the plurality of driving poles connected to each other extend along the second direction Y. The touch control principle can be briefly described as follows: the driving module applies a driving signal (Tx signal) to the driving pole, the detecting module receives a detecting signal (Rx signal) of the detecting pole, there is a coupling capacitor between the driving pole and the detecting pole, and then Xn*Yn times of scanning the coupling capacitor value is performed to determine the touch position. When there is no touch, the mutual capacitance value (or can be called mutual capacity value) of the Tx signal and the Rx signal is C0; after the touch, due to the access of the finger, the current flows into the ground through the finger, resulting in that the mutual capacity value of the Tx signal and the Rx signal is reduced to C1. By judging the change (C0-C1, i.e. ΔCm) before and after the capacitance, the driving pole coordinate and the detecting pole coordinate (or can be called report point) corresponding to the touch point can be detected, and then the coordinate of the touch point is obtained.

[0054] Figure 2 is a partial schematic diagram of a touch substrate in an exemplary embodiment of the present disclosure, Figure 2 shows one 2*2 area therein, including four touch areas; Figure 3 is a schematic diagram of one touch area in Figure 2. The present disclosure provides a touch substrate, including a substrate and a touch conductive layer. The substrate is provided with a plurality of array-arranged touch areas. The touch conductive layer is located on one side of the substrate, and the touch conductive layer includes a first touch electrode 10 and a second touch electrode 20. The first touch electrode 10 is located in the touch area, and a plurality of first touch electrodes 10 arranged along a second direction are connected to each other. The second touch electrode 20 is located in the touch area, and a plurality of second touch electrodes 20 arranged along a first direction X are connected to each other. The first direction X intersects the second direction Y. In one touch area, there is a gap between the first touch electrode 10 and the second touch electrode 20, which can be called a Dummy area.

[0055] In an exemplary embodiment, the first touch electrode and the second touch electrode are arranged in the touch area, the touch substrate includes a plurality of array-arranged touch areas, and the touch area is a repeating unit. In the first direction, the second touch electrodes in adjacent touch areas are connected to each other; in the second direction, the first touch electrodes in adjacent touch areas are connected to each other.

[0056] In an exemplary embodiment, one of the first touch electrodes 10 and the second touch electrodes 20 can be a driving electrode corresponding to a Tx signal, and the other can be a detecting electrode corresponding to an Rx signal. In the following exemplary embodiments, the first touch electrodes 10 are taken as the driving electrodes corresponding to the Tx signals, and the second touch electrodes 20 are taken as the detecting electrodes corresponding to the Rx signals.

[0057] Exemplarily, in the exemplary embodiment of FIG. 2, the second direction Y can be a vertical direction, and the first direction X can be a horizontal direction. The first touch electrodes 10 arranged along the second direction Y, i.e., the vertical direction, are connected to each other, and the second touch electrodes 20 arranged along the first direction X, i.e., the horizontal direction, are connected to each other. For example, in FIG. 2, the two second touch electrodes 20a in the first row are connected to each other, and the two second touch electrodes 20a in the first row are shown in red in FIG. 2; the two second touch electrodes 20b in the second row are connected to each other, and the two second touch electrodes 20b in the second row are shown in purple in FIG. 2; the two first touch electrodes 10a in the first column are connected to each other, and the two first touch electrodes 10a in the first column are shown in white in FIG. 2; and the two first touch electrodes 10b in the second column are connected to each other, and the two first touch electrodes 10b in the second column are shown in white in FIG. 2.

[0058] As shown in FIGS. 2 and 3, the first touch electrodes 10 include the first pattern part 11 and the second pattern part 12 arranged along the second direction, and the first pattern part 11 and the second pattern part 12 are electrically connected. The first pattern part 11 and the second pattern part 12 are symmetrical to each other. For example, the touch area can have a second central axis O2 passing through the center and a first central axis O1, the second central axis O2 can extend along the second direction, and the first central axis O1 can extend along the first direction. The first pattern part 11 and the second pattern part 12 can be symmetrical to each other about the first central axis O1.

[0059] As shown in FIG. 3, the first pattern part 11 includes a first stem part 111 and a first branch part 112, the first stem part 111 is in a shape of a broken line or a curve, and the first branch part 112 extends from the first stem part 111 towards a direction away from the first stem part 111. For example, referring to FIG. 3, the shape of the first stem part 111 is schematically shown by a black thick dashed line. The first stem part 111 is in a shape of a broken line extending along the first direction, and the first branch part 112 extends from the first stem part 111 towards a direction away from the first stem part 111. Thus, the first branch part 112 forms a bifurcation on the first stem part 111. In other exemplary embodiments, the first stem part 111 can be in a shape of a curve extending along the first direction. The second pattern part 12 is symmetrical to the first pattern part 11 about the first center axis O1, and correspondingly, the second pattern part 12 can include a corresponding first stem part 111 and a first branch part 112.

[0060] As shown in FIG. 3, the second touch electrode 20 includes a second stem part 21 disposed along the periphery of the first touch electrode 10 and a second branch part 22 connected to the second stem part 21, the second branch part 22 extends from the second stem part 21 towards the first touch electrode 10 and is inserted into the gap region of the first touch electrode 10. Referring to FIG. 3, the shape of the second stem part 21 is schematically shown by a light gray thick dashed line, it can be seen that the second stem part 21 is disposed along the periphery of the first touch electrode 10, and the second branch part 22 extends from the second stem part 21 towards the first touch electrode 10, thus, the second branch part 22 forms a bifurcation of the second stem part 21 and is inserted into the gap region of the first touch electrode 10. The gap region of the first touch electrode 10 can include a region between adjacent first branch parts 112 and a region between the first stem part 111 and the first branch part 112. As can be seen from FIG. 3, the second branch part 22 is inserted into the gap region between the first stem parts 111 and / or between the first branch parts 112 and / or between the first stem part 111 and the first branch part 112.

[0061] In an exemplary embodiment, during the touch process, the larger the coupling region between the first touch electrode 10 and the second touch electrode 20, the greater the mutual capacitance change between the first touch electrode 10 and the second touch electrode 20, thus, the touch precision and touch response performance can be improved.

[0062] In the technical solution of the present disclosure, the first touch electrode 10 and the second touch electrode 20 are both located in the touch area, the first touch electrode 10 includes a first trunk portion 111 and a first branch portion 112 extending outward from the first trunk portion 111; the second touch electrode 20 includes a second trunk portion 21 arranged along the periphery of the first touch electrode 10 and a second branch portion 22 extending towards the inner side from the second trunk portion 21 and inserted in the gap area of the first touch electrode 10. Such a structure can increase the coupling area between the second touch electrode 20 and the first touch electrode 10, increase the interactive capacitance change between the first touch electrode 10 and the second touch electrode 20 during touch, and thus improve the touch precision and touch response performance, and improve the human-computer interaction experience.

[0063] Exemplarily, the first pattern portion 11 and the second pattern portion 12 are mutually symmetrical about the first central axis O1, and the second touch electrode 20 is symmetrical about the first central axis O1, that is, the portions of the second touch electrode 20 located on both sides of the first central axis O1 are symmetrical about the first central axis O1, as shown in FIG. 3.

[0064] In an exemplary embodiment, as shown in FIG. 3, the shape of the first trunk portion 111 is a polyline shape, and the first branch portion 112 extends perpendicularly from the first trunk portion 111 towards a direction away from the first trunk portion 111. For example, in FIG. 3, the shape of the first trunk portion 111 is a polyline shape, and therefore, the first trunk portion 111 can be divided into multiple segments according to the inflection points. In FIG. 3, the first trunk portion 111 is divided into a first segment 111a, a second segment 111b, a third segment 111c and a fourth segment 111d from right to left in sequence. The first branch portion 112a starts from the first segment 111a of the first trunk portion 111, is perpendicular to the first segment 111a, and extends perpendicularly outward from the first segment 111a. Alternatively, in other exemplary embodiments, the first branch portion 112 can be inclined outward from the corresponding segment of the first trunk portion 111, that is, the first branch portion 112 is not perpendicular to the corresponding segment of the first trunk portion 111. For example, the angle between the first branch portion 112a and the first segment 111a can be less than or equal to 90°. The angle between the first branch portion 112 and the corresponding segment of the first trunk portion 111 can be set as needed.

[0065] Exemplarily, the shape of the first trunk portion 111 can be a "W" shape, and the first trunk portion 111 in the first pattern portion 11 is arranged in the opposite direction to the first trunk portion 111 in the second pattern portion 12. Therefore, as shown in FIG. 3, when the shape of the first trunk portion 111 in the first pattern portion 11 is a "W" shape, the shape of the first trunk portion 111 in the second pattern portion 12 is a reversed "W" shape.

[0066] Fig. 4 is an enlarged schematic view of the area A in Fig. 3, where the area A is schematically shown by a blue dashed oval in Fig. 3; Fig. 5 is an enlarged schematic view of the area A without applying the technology disclosed herein.

[0067] In an exemplary embodiment, as shown in Fig. 4, the first branch portion 112 includes a first sub-branch 1121, and the second branch portion 22 includes a second sub-branch 221, which is parallel to and adjacent to the first sub-branch 1121. The width of the second sub-branch 1121 is different from the width of the first sub-branch 221.

[0068] As shown in Fig. 5, without applying the technology disclosed herein, the width of the second sub-branch 1121 is the same as the width of the first sub-branch 221.

[0069] In Figs. 4 and 5, the first sub-branch 1121 is shown in yellow, and the second sub-branch 221 is shown in red. The gap between the first sub-branch 1121 and the second sub-branch 221 can be a blank area (shown in green in Fig. 4), which ensures that the first sub-branch 1121 and the second sub-branch 221 are insulated from each other. In Fig. 4, the width of the second sub-branch 221 is different from the width of the first sub-branch 1121. In Fig. 5, the width of the second sub-branch 221 is the same as the width of the first sub-branch 1121.

[0070] In a touch process, the capacitance between a finger and an Rx signal of the second sub-branch can be named Cf_Rx, the capacitance between the finger and a Tx signal of the first sub-branch can be named Cf_Tx, the floating degree (i.e., the insulation degree) between a human body and a touch system when the finger touches the display screen can be named Cbg, and generally, Cbg is a fixed value. LGM is the equivalent capacitance increase amount caused by the floating degree when the finger touches the display screen.

[0071] According to the formula LGM = (Cf_Rx * Cf_Tx) / (Cbg + Cf_Rx + Cf_Tx), the greater the difference between Cf_Rx and Cf_Tx, the smaller the LGM, i.e., the smaller the equivalent capacitance increase amount caused by the floating degree when the finger touches the display screen, which makes the real touch accuracy and touch response performance better.

[0072] In an exemplary embodiment, since the touch area is consistent, the sum of the widths of the first sub-branch 1121 and the second sub-branch 221 is the same. Therefore, when the width of the first sub-branch 1121 increases, the width of the second sub-branch 221 decreases; or when the width of the second sub-branch 221 increases, the width of the first sub-branch 1121 decreases.

[0073] Without applying the technology disclosed in the present disclosure, as shown in FIG. 5, the width of the first sub-branch 1121 and the second sub-branch 221 is the same, and Cf_Tx=Cf_Rx.

[0074] In one exemplary embodiment of the present disclosure, as shown in FIG. 4, the width of the second sub-branch 221 is different from the width of the first sub-branch 1121. Thus, Cf_Rx*Cf_Tx in FIG. 4 is less than Cf_Rx*Cf_Tx in FIG. 5. For example, in FIG. 4, the width ratio of the second sub-branch 221 to the first sub-branch 1121 is 4:6, and thus Cf_Rx:Cf_Tx=4:6. In FIG. 5, the width ratio of the second sub-branch 221 to the first sub-branch 1121 is 5:5, and thus Cf_Rx:Cf_Tx=5:5. Therefore, Cf_Rx*Cf_Tx in FIG. 4 is less than Cf_Rx*Cf_Tx in FIG. 5.

[0075] Therefore, compared with FIG. 5 without applying the technology disclosed in the present disclosure, the LGM in the exemplary embodiment of the present disclosure is smaller, so that the real touch accuracy and touch response performance are better, and the human-computer interaction experience can be improved.

[0076] In FIG. 4, the width ratio of the second sub-branch 221 to the first sub-branch 1121 is 4:6, and in actual embodiments, the width ratio of the second sub-branch 221 to the first sub-branch 1121 can be set as needed. Alternatively, the width of the second sub-branch can be greater than the width of the first sub-branch.

[0077] In one exemplary embodiment, the substrate can be an OLED substrate, and the orthographic projection of the touch conductive layer on the substrate is located between the openings corresponding to the OLED device, that is, the touch conductive layer is a grid structure, as shown in FIG. 4. The width of the second sub-branch 221 can be 4 times the size of the opening, and the width of the first sub-branch 1121 can be 6 times the size of the opening.

[0078] In one exemplary embodiment, the second sub-branch and the first sub-branch can both be rectangular strips. In other exemplary embodiments, the second sub-branch and the first sub-branch can be other shapes as long as they are parallel to each other and the corresponding widths are different.

[0079] As shown in FIG. 3, the first stem portion 111 has a shape of a broken line, and the first sub-branch 1121 extends in a direction perpendicular to a starting segment of the first sub-branch 1121, where the starting segment of the first sub-branch 1121 is a segment of the first stem portion 111 connected to the first sub-branch 1121. For example, the first stem portion 111 includes multiple segments. The first stem portion 111 can be divided into multiple segments according to the inflection points of the broken line. The starting segment of the first sub-branch is the fourth segment 111d, and the first sub-branch 1121 extends in a direction perpendicular to the fourth segment 111d. The second stem portion 21 can include a first stem segment 211, which is located on one side of the second pattern portion 112 and extends in the second direction. For example, the first stem segment 211 is located on the left side or the right side of the second pattern portion 112. The second sub-branch 221 extends from the first stem segment 211 towards the starting segment of the first sub-branch 1121, such as the fourth segment. The second sub-branch 221 is parallel to the first sub-branch 1121.

[0080] FIG. 6 is an enlarged schematic view of the B region in FIG. 3, where the B region is schematically shown by a white dashed box in FIG. 3. FIG. 7 is an enlarged schematic view of the B region without applying the technology disclosed herein.

[0081] As shown in FIG. 3 and FIG. 6, the second stem portion 21 can include a first stem segment 211, which is located on one side of the first pattern portion 11 and extends in the second direction. For example, the first stem segment 211 is located on the left side or the right side of the first pattern portion 11. The first touch electrode 10 further includes a first block portion 113 connected to an end of the first stem portion 111, and the first block portion 113 is located between the first stem segment 211 and the first stem portion 111. An edge of the first block portion 113 parallel to an inner edge of the first stem segment 211 is provided with a first matching structure 31, and the inner edge of the first stem segment 211 is provided with a second matching structure 32, and the first matching structure 31 matches the second matching structure 32.

[0082] For example, in FIG. 3 and FIG. 6, the first stem portion 111 includes a first segment 111a, a second segment 111b, a third segment 111c, and a fourth segment 111d connected to each other. The first block portion 113 is connected to an end of the fourth segment 111d, and the first block portion 113 is located between the first stem segment 211 and the fourth segment 111d. An outer edge of the first block portion 113 is parallel to an inner edge of the first stem segment 211, and the outer edge of the first block portion 113 is provided with a first matching structure. The inner edge of the first stem segment 211 is provided with a second matching structure, and the first matching structure matches the second matching structure.

[0083] Without applying the technology disclosed herein, as shown in FIG. 7, the outer edge of the first block portion 113 is a straight line, the inner edge of the first stem segment 211 is a straight line, and the outer edge of the first block portion 113 is parallel to the inner edge of the first stem segment 211.

[0084] In the example embodiment of the present disclosure shown in FIG. 6, by setting the first matching structure and the second matching structure, the coupling length of the first touch electrode 10 and the second touch electrode 20 can be increased, and thus the winding area between the Tx signal and the Rx signal can be increased, and the initial mutual capacitance value C0 of the first touch electrode 10 and the second touch electrode 20 can be increased. Without the application of the technology of the present disclosure, the outer side edge of the first block part 113 and the inner side edge of the first stem part 211 are straight lines, so that the Tx signal amount of the first touch electrode 10 is less than that of the embodiment shown in FIG. 6, and the coupling capacitance value between the Tx signal and the Rx signal is small, the initial mutual capacitance value C0 is smaller than that of the embodiment shown in FIG. 6, which can easily lead to a decrease in the accuracy of the reported touch point after touch and false reporting.

[0085] In the example embodiment of the present disclosure shown in FIG. 6, by setting the first matching structure and the second matching structure, the signal amount of the Tx signal is increased, the coupling length between the Tx signal and the Rx signal is increased, and the initial mutual capacitance value C0 is increased, which can improve the accuracy of the reported touch point after touch and reduce false reporting, thereby improving the touch precision and bringing a more excellent human-computer interaction experience.

[0086] For example, one of the first matching structure and the second matching structure can be a protrusion, and the other can be a recess. For example, the first matching structure is a recess, the second matching structure is a protrusion, and the protrusion matches the recess. The shapes of the first matching structure and the second matching structure are not limited to protrusions and recesses, or can be wave shapes and the like.

[0087] FIG. 8 is an enlarged schematic view of part C in FIG. 3, and FIG. 3 uses a blue dashed oval to schematically show the A2 region; FIG. 9 is an enlarged schematic view of part C without the application of the technology of the present disclosure. In an example embodiment, as shown in FIGS. 3 and 8, the first stem part 111 includes two first stem subparts (111a+111b) arranged and connected in the first direction, and each first stem subpart includes a first segment 111a and a second segment 111b connected to each other or a third segment 111c and a fourth segment 111d connected to each other. The shape of the first stem subpart is “V” shaped. The two first touch electrodes 10 are connected by a first connecting part 13, and the first connecting part 13 is located between two second touch electrodes 20 adjacent in the second direction. The maximum dimension d1 of the first connecting part 13 in the first direction (as shown in FIG. 8) is greater than the distance d0 between the tips of the two first stem subparts in the first direction (as shown in FIG. 3).

[0088] For example, in FIGS. 2 and 3, the distance between the tips of the two first stem subparts is d0, and the maximum dimension of the first connecting part 13 in the first direction is d1, and d1 is greater than d0.

[0089] As shown in FIG. 9, without the application of the present disclosure, the maximum dimension of the first connecting portion 13 in the first direction is d2, which is smaller than d0.

[0090] FIG. 10 is a plan view of a touch substrate, and FIG. 11 is a partial view of the lower left corner region of FIG. 10. As shown in FIG. 10 and FIG. 11, the display region (i.e., AA region) of the touch substrate can be divided into a straight region corresponding to the straight edges of the AA region and a corner region AA1 corresponding to the corners of the AA region. The region outside the corner region is the straight region AA2. The corners of the AA region are usually rounded. The edges of the straight region are straight, and thus, the length of the Tx signal and the Rx signal accessing the AA region has no special requirements.

[0091] In the corner region AA1, the pattern integrity of the first touch electrode 10 and the second touch electrode 20 usually cannot reach 100%. If the length of the Tx signal and the Rx signal accessing the display region (AA region) is too short, the resistance and signal quantity between the signal lines will be inconsistent with those of the straight region of the touch substrate, which will reduce the touch point accuracy.

[0092] In an exemplary embodiment of the present disclosure, as shown in FIG. 8, the first connecting portion 13 in the first direction is extended to both sides compared with the first connecting portion 13 in the first direction in FIG. 9, so that the maximum dimension d1 of the first connecting portion 13 in the first direction is larger than the maximum dimension d2 of the first connecting portion 13 in the first direction in FIG. 9. The first connecting portion 13 belongs to a part of the first touch electrode 10, and the increase of the dimension of the first connecting portion 13 can increase the coupling length of the Tx signal and the Rx signal in the corner region, increase the mutual capacitance of the first touch electrode 10 and the second touch electrode 20 in the corner region, reduce the difference between the resistance and the signal quantity of the touch electrode accessing the AA region in the corner region and those in the straight region, avoid reducing the touch point accuracy, and ensure the touch performance.

[0093] In one example embodiment, as shown in FIG. 3, the second stem portion 21 includes a first stem segment 211, which is located at one side of the second pattern portion 12 and extends in the second direction. The first stem segment 211 is located between two first touch electrodes 10 adjacent in the first direction, as shown in FIG. 2. The second touch electrode 20 includes two first stem segments, which are located at the same side of the first pattern portion 11 and the second pattern portion 12. For example, in FIG. 2 and FIG. 3, the second touch electrode 20 includes a first stem segment 211a located at the left side of the first pattern portion 11 and a first stem segment 211b located at the left side of the second pattern portion 12, which can be located on the same straight line. The two first stem segments 211a and 211b can be connected by a second stem segment 212. For example, the two first stem segments 211a and 211b located at the same side of the second stem portion 21 are connected by the second stem segment 212. The second stem segment 212 has a shape of a fold line bending towards the center of the touch area. Two second touch electrodes 20 adjacent in the first direction X are connected by the first stem segment 211. For example, as shown in FIG. 2, the two second stem segments 212 between the first stem segments 211a and 211b are oppositely arranged, and the second stem segments 212 are provided with second branch portions. The oppositely arranged two second stem segments 212 and the second branch portions thereon can be called flower portions 213, which are arranged in the gap region between two first touch electrodes 10 adjacent in the first direction. Two second touch electrodes 20 adjacent in the first direction are connected by a second connection portion, which includes the flower portions 213 and the two first stem segments 211 connected with the flower portions 213, so that the first stem segment 211 located between two first touch electrodes 10 adjacent in the first direction is shared by two second touch electrodes 20. As can be seen from FIG. 2, the first stem segment 211 is shared by the left second touch electrode 20 and the right second touch electrode 20 in the first row.

[0094] As can be seen from FIG. 2, the flower portion 213 is composed of a part of the second stem portion 21 and the second branch portion 22 thereon, and the peripheral branches of the flower portion 213 can be inserted into the gap region of the first touch electrode 10, which increases the coupling length of the second touch electrode 20 with the first touch electrode 10, increases the mutual capacity value between the Tx signal and the Rx signal, and is beneficial to improving the touch performance.

[0095] In one example embodiment of the present disclosure, the substrate includes a base and a pixel defining layer arranged on one side of the base. The pixel defining layer is provided with a plurality of openings, and the openings are provided with light emitting devices. The light emitting device can include an OLED device. Referring to FIG. 4 and FIG. 6, the first touch electrode 10 includes a plurality of first conductive wire segments (shown by yellow lines) connected with each other, and the orthogonal projection of the first conductive wire segments on the base is located between adjacent openings. Thus, each part of the first touch electrode 10 is a mesh structure.

[0096] Referring to FIGS. 4 and 6, the second touch electrode 20 includes a plurality of second conductive line segments (shown by red lines) connected to each other, and the orthogonal projection of the second conductive line segments on the substrate is located between adjacent openings. Thus, each part of the second touch electrode 20 is in a mesh structure.

[0097] As shown in FIGS. 2 and 3, the second touch electrode 20 can further include an extension 23 located in the middle of the touch area and disposed in the gap area of the first touch electrode 10. For example, the extension 23 is located in the gap area between the first pattern 11 and the second pattern 12. The second stem 21 includes a first part and a second part located on both sides of the extension 23 along the first direction, the first part and the second part are symmetrically disposed, and the first part and the second part are connected by the extension 23. In FIG. 3, the first part is located on the left side of the extension 23, and the second part is located on the right side of the extension 23.

[0098] FIG. 12 is an enlarged schematic view of the position of the filling block 231 in FIG. 3, and FIG. 13 is an enlarged schematic view of the position of the filling block 231 without applying the technology disclosed. As shown in FIG. 3, the first stem 111 includes two first sub-stems arranged and connected along the first direction, and the shape of the first sub-stem is "V" shape. The extension 23 includes a filling block 231 located between the two first sub-stems. As shown in FIGS. 3 and 12, the filling block 231 includes a first sub-edge 2311 parallel to the edge of one of the two first sub-stems, and a second sub-edge 2312 parallel to the edge of the other of the two first sub-stems. The position of the first sub-edge 2311 close to the second sub-edge 2312 is provided with a first step edge 2313, and the position of the second sub-edge 2312 close to the first sub-edge 2311 is provided with a second step edge 2314. In FIG. 12, the first sub-edge 2311, the first step edge 2313, the second step edge 2314 and the second sub-edge 2312 of the filling block 231 are shown by white dashed lines.

[0099] The distance L1 between the edge of the first step edge 2313 and the edge of the corresponding first sub-stem is greater than the distance L2 between the first sub-edge 2311 and the edge of the corresponding first sub-stem. The distance L3 between the edge of the second step edge 2314 and the edge of the corresponding first sub-stem is greater than the distance L4 between the second sub-edge and the edge of the corresponding first sub-stem. As can be seen from FIG. 12, the first step edge 2313 and the second step edge 2314 are both L-shaped steps, and the long edge of the first step edge 2313, i.e., the edge parallel to the first sub-edge 2311, is the edge of the first step edge 2313, and the long edge of the second step edge 2314, i.e., the edge parallel to the second sub-edge 2312, is the edge of the second step edge 2314.

[0100] △Cm is an important index for measuring touch performance, which is the variation of the capacitance (C0-C1) between Tx signal and Rx signal before and after the finger touch. The larger the △Cm is, the easier the finger touch is detected by the scanning, and the less likely the false alarm caused by the disturbance from the external environment. In FIG. 13, the distance between the first sub-edge of the filling block part 231 and the edge of the corresponding first branch part is the same, and the distance between the second sub-edge of the filling block part 231 and the edge of the corresponding first branch part is the same, both of which are L2; L2=L4, that is, the distance between the edge of the filling block part 231 and the edge of the corresponding first branch part is the same. In FIG. 13, the area between Tx and Rx is the Dummy area, when the finger touches this area, since the area is floating, the initial mutual capacitance C0 is large, the current is less grounded when the finger touches (i.e., the C1 value changes less), and the variation of the mutual capacitance △Cm is small.

[0101] In an example embodiment of the present disclosure, as shown in FIG. 12, L1 is greater than L2, and L3 is greater than L4, so that the area of the Dummy area (shown by green lines) between the filling block part 231 and the first main branch part 111 is increased relative to FIG. 13. That is, in the non-Rx and Tx finger signal mutual winding place of the touch pattern (i.e., the Dummy area between the filling block part 231 and the first main branch part 111), FIG. 12 increases the Dummy area of the opening area by (4+3) times relative to FIG. 13, which makes the coupling capacitance between the Rx signal and the Tx signal in FIG. 12 smaller relative to FIG. 13, and the initial mutual capacitance C0 is smaller. Thus, the current is more grounded when the finger touches, so that the C1 value will become smaller, and the variation of the mutual capacitance △Cm is larger relative to FIG. 13. Thus, the touch is easier to be detected by the scanning, and is not easy to be disturbed by the external environment to generate false alarm, thereby improving the touch performance.

[0102] For example, as shown in FIG. 3, the extension part 23 is symmetrical about the first center axis O1 of the touch area, and is symmetrical about the second center axis O2 of the touch area.

[0103] In an example embodiment, as shown in FIG. 12, L1 is the same as L3, L2 is the same as L4, L2 is the same as the size of the opening, and L1=2*L2. The length of the edge part of the first step edge is 4 times the size of the opening, and the length of the edge part of the second step edge is 3 times the size of the opening.

[0104] FIG. 14 is an enlarged schematic view of the D area in FIG. 3, and FIG. 15 is an enlarged schematic view of the D area without applying the technology of the present disclosure.

[0105] In an example embodiment, as shown in FIG. 3 and FIG. 14, the second stem part 21 includes a second stem segment 212 located between the first pattern part 11 and the second pattern part 12 and outside the middle of the touch control area. For example, two first stem segments 211 of the second stem part 21 on the same side are connected by the second stem segment 212. The second stem segment 212 is in the shape of a fold line bent towards the center of the touch control area. The second branch part 22 includes a third sub-branch 223 extending from the second stem segment 212 towards the inside and inserted into the gap area of the first touch control electrode 10, and the depth of the third sub-branch 223 inserted into the gap area of the first touch control electrode 10 is greater than or equal to 3 times the size of the opening.

[0106] Without the application of the disclosed technology, as shown in FIG. 15, the depth of the third sub-branch 223 inserted into the gap area of the first touch control electrode 10 is 1 times the size of the opening, so that the interaction length of the Tx signal and the Rx signal at the position E in FIG. 14 is 1 times the size of the opening, and the coupling length of the two is small, reducing the mutual capacity value Cm of the Tx signal and the Rx signal.

[0107] In the example embodiment of the disclosed technology, as shown in FIG. 14, the depth of the third sub-branch 223 inserted into the gap area of the first touch control electrode 10 is greater than or equal to 3 times the size of the opening, greatly increasing the interaction length of the Tx signal and the Rx signal at the position D in FIG. 14 compared to FIG. 15, increasing the mutual capacity value Cm of the Tx signal and the Rx signal, and being beneficial to improving the accuracy of the touch report and avoiding false reports.

[0108] As can be seen from FIG. 2 and FIG. 3, a plurality of sub-branches extend outwardly on the second stem segment 212, and the flower part 213 includes the second stem segment 212 and the sub-branches located on the second stem segment 212.

[0109] In an example embodiment, as shown in FIG. 3, the first touch control electrode 10 and the second touch control electrode 20 can be images symmetrical about the second center axis O2 of the touch control area, and can be patterns symmetrical about the first center axis O1 of the touch control area. The second center axis O2 is a center axis of the touch control area parallel to the second direction, and the first center axis O1 can be a center axis of the touch control area parallel to the first direction. Such a structure can ensure the consistency of the touch control signals on the upper, lower, left and right of the touch control area, and is beneficial to improving the accuracy of the touch response.

[0110] Figure 16 is a schematic cross-sectional view of a touch substrate in an example embodiment of the present disclosure. As shown in Figure 16, the substrate 50 includes a base 51 and a thin film transistor 52 on a side of the base. The substrate 50 further includes a passivation layer 53 on a side of the thin film transistor 52 facing away from the base 51, a first planarization layer 54 on a side of the passivation layer 53 facing away from the base, a transfer metal layer 55 on a side of the first planarization layer 54 facing away from the base, and a second planarization layer 56 on a side of the transfer metal layer 55 facing away from the base. The transfer metal layer 55 is electrically connected to a drain of the thin film transistor 52. The substrate 50 further includes an anode layer 57 including a plurality of anodes 571, the anodes 571 being electrically connected to the transfer metal layer 55. The anode layer 57 is on a side of the second planarization layer 56 facing away from the base 51.

[0111] The substrate 50 can further include a pixel defining layer 58 on a side of the anode layer 57 facing away from the base, the pixel defining layer 58 being provided with a plurality of openings corresponding to the plurality of anodes 571, the anodes 571 being exposed through the openings. The substrate 50 further includes a light emitting layer 572 on the openings, and a cathode 573 on a side of the pixel defining layer 58 and the light emitting layer 572 facing away from the base 51. The cathode 573, the light emitting layer 572, and the anodes 571 form an organic light emitting diode (OLED) device.

[0112] The substrate 50 further includes a thin film encapsulation layer 59 on a side of the cathode facing away from the base, the thin film encapsulation layer 59 including a first inorganic encapsulation layer 591, an organic encapsulation layer 592, and a second inorganic encapsulation layer 593 stacked.

[0113] The touch conductive layer 60 can be on a side of the thin film encapsulation layer 59 facing away from the base, the touch conductive layer 60 can include a first conductive layer 61, a second conductive layer 62, and a touch insulating layer 63 between the first conductive layer 61 and the second conductive layer 62. A buffer layer can be further provided between the first conductive layer 61 and the substrate 50.

[0114] Figure 17 is a schematic cross-sectional view of E-E in Figure 2 in an example embodiment. As shown in Figures 16 and 17, the first conductive layer 61 can include a first touch electrode 611 and a second touch electrode 612, and the second conductive layer 62 can include a bridge electrode 621. The first pattern portion 11 and the second pattern portion 12 are connected by the bridge electrode 621. In an example embodiment, the second touch electrode 612 is drawn as a different fill pattern from the first touch electrode 611 in Figure 17 for convenience of distinguishing, it can be understood that the first touch electrode 611 and the second touch electrode 612 are provided in the same layer and are both on an upper surface of the touch insulating layer 63. The first touch electrode 611 and the second touch electrode 612 can be provided in the same conductive layer and formed by one-time mask process.

[0115] In another exemplary embodiment, the first touch electrode 611 and the second touch electrode 612 can be located in the second conductive layer, and the bridge electrode 621 can be located in the first conductive layer.

[0116] Exemplarily, the material of the conductive layer can be a conductive material, for example, a metal material such as any one or more of silver (Ag), copper (Cu), aluminum (Al), titanium (Ti), and molybdenum (Mo), or an alloy material of the above-mentioned metals, such as aluminum-neodymium alloy (AlNd) or molybdenum-niobium alloy (MoNb), which can be a single-layer structure or a multi-layer composite structure such as Ti / Al / Ti, etc. The material of the conductive layer can also be a transparent conductive material, for example, indium tin oxide, indium zinc oxide, etc.

[0117] The touch substrate of the present disclosure can increase the coupling area between the second touch electrode 20 and the first touch electrode 10, increase the interactive capacitance change amount between the first touch electrode 10 and the second touch electrode 20 in the touch process, and thus improve the touch precision and touch response performance, and improve the human-computer interaction experience.

[0118] The exemplary embodiments of the present disclosure also provide a display device including the touch substrate of the foregoing embodiments. The display device can be any product or component with display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, etc.

[0119] In summary, in the technical solution of the present disclosure, the first touch electrode and the second touch electrode are both located in the touch area, the first touch electrode includes a first main body and a first branch extending outward from the first main body, and the second touch electrode includes a second main body arranged along the periphery of the first touch electrode and a second branch extending inward from the second main body and inserted into the gap region of the first touch electrode. Such a structure can increase the coupling area between the second touch electrode and the first touch electrode, increase the interactive capacitance change amount between the first touch electrode and the second touch electrode in the touch process, and thus improve the touch precision and touch response performance, and improve the human-computer interaction experience.

[0120] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present disclosure.

[0121] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and do not imply or suggest relative importance or a number of the technical features indicated. Thus, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0122] In the present disclosure, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, or can be detachable connection, or integrated; can be mechanical connection, or can be electrical connection, or can be communication; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0123] In the present disclosure, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0124] The above disclosure provides many different implementations or examples to implement different structures of the present disclosure. In order to simplify the present disclosure, the components and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present disclosure. In addition, the present disclosure can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0125] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any skilled person in the art can easily think of various changes or replacements within the technical scope disclosed by the present disclosure, and different parts in different embodiments can be combined with each other without conflict, which should be covered in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A touch substrate, comprising: a substrate, provided with a plurality of touch areas arranged in an array; a touch conductive layer on one side of the substrate, the touch conductive layer comprising first touch electrodes in the touch areas and second touch electrodes in the touch areas, a plurality of the second touch electrodes arranged in a first direction being connected to each other, and a plurality of the first touch electrodes arranged in a second direction being connected to each other, the first direction intersecting the second direction; wherein the first touch electrode comprises a first pattern portion and a second pattern portion arranged in the second direction and electrically connected to each other, the first pattern portion and the second pattern portion being symmetrical to each other, the first pattern portion comprising a first stem portion and a first branch portion, the first stem portion being in a shape of a broken line or a curve, and the first branch portion extending from the first stem portion towards a direction away from the first stem portion; the second touch electrode comprising a second stem portion arranged on a periphery of the first touch electrode and a second branch portion connected to the second stem portion, the second branch portion extending from the second stem portion towards the first touch electrode and being arranged in a gap region of the first touch electrode, the gap region comprising a region between adjacent first branch portions and a region between the first stem portion and the first branch portion. 2.The touch substrate of claim 1, wherein, the first stem portion is in a shape of a broken line, and the first branch portion extends perpendicularly from the first stem portion towards a direction away from the first stem portion. 3.The touch substrate of claim 1, wherein, the first stem portion is in a shape of "W", and the first stem portion in the first pattern portion is arranged opposite to the first stem portion in the second pattern portion. 4.The touch substrate of claim 1, wherein, the first branch portion comprises a first sub-branch, and the second branch portion comprises a second sub-branch, the second sub-branch being parallel and adjacent to the first sub-branch, and a width of the second sub-branch being different from a width of the first sub-branch. 5.The touch substrate of claim 4, wherein, the second sub-branch and the first sub-branch are both in a shape of a rectangular strip. 6.The touch substrate of claim 4, wherein, the second stem portion comprises a first stem segment, the first stem segment being arranged on one side of the first pattern portion and extending in the second direction, the first stem portion is in a shape of a broken line, an extending direction of the first sub-branch is perpendicular to a starting segment of the first sub-branch, the second sub-branch extends from the first stem segment towards the starting segment of the first sub-branch, and the starting segment of the first sub-branch is a portion of the first stem portion connected to the first sub-branch. 7.The touch substrate of claim 1, wherein, the second stem portion comprises a first stem segment, the first stem segment being arranged on one side of the first pattern portion and extending in the second direction, the first touch electrode further comprises a first block portion connected to an end portion of the first stem portion, the first block portion being arranged between the first stem segment and the first stem portion, an edge of the first block portion parallel to an inner edge of the first stem segment is provided with a first matching structure, and an inner edge of the first stem segment is provided with a second matching structure, the first matching structure and the second matching structure being matched to each other. 8.The touch substrate of claim 7, wherein, one of the first matching structure and the second matching structure is a protrusion, and the other is a recess. 9.The touch substrate of claim 1, wherein, The first stem part includes two first sub-stem parts arranged and connected along the first direction, the first sub-stem part is in a "V" shape, two first touch electrodes are connected through a first connecting part, the first connecting part is located between two second touch electrodes adjacent in the second direction, and the maximum size of the first connecting part in the first direction is greater than the distance between the tips of the two first sub-stem parts in the first direction. 10.The touch substrate of claim 1, wherein, The second stem part includes a first stem segment, the first stem segment is located on one side of the first pattern part and extends along the second direction, the first stem segment is located between two first touch electrodes adjacent in the first direction, the second touch electrode includes two first stem segments, the two first stem segments are located on the same side of the first pattern part and the second pattern part, the two first stem segments are connected through a second stem segment, the second stem segment is in a fold line shape bent towards the center of the touch area, and two second touch electrodes adjacent in the first direction are connected through the first stem segment. 11.The touch substrate of any one of claims 1-10, wherein, The substrate includes a base and a pixel defining layer provided on one side of the base, the pixel defining layer is provided with a plurality of openings, and a light emitting device is arranged in each opening, the first touch electrode includes a plurality of first conductive wire segments connected to each other, and the orthogonal projection of the first conductive wire segment on the base is located between adjacent openings, and the second touch electrode includes a plurality of second conductive wire segments connected to each other, and the orthogonal projection of the second conductive wire segment on the base is located between adjacent openings. 12.The touch substrate of claim 11, wherein, The second touch electrode further includes an extension part located in the middle of the touch area and arranged in the first touch electrode gap area, the second stem part includes a first part and a second part located on both sides of the extension part along the first direction, the first part and the second part are symmetrically arranged, and the first part and the second part are connected through the extension part. The first stem part includes two first sub-stem parts arranged and connected along the first direction, the first sub-stem part is in a "V" shape, the extension part includes a filling block part located between the two first sub-stem parts, the filling block part includes a first sub-edge parallel to the edge of one of the two first sub-stem parts and a second sub-edge parallel to the edge of the other of the two first sub-stem parts, a first step edge is arranged at the position of the first sub-edge close to the second sub-edge, a second step edge is arranged at the position of the second sub-edge close to the first sub-edge, the distance L1 between the edge of the first step edge and the edge of the corresponding first sub-stem part is greater than the distance L2 between the first sub-edge and the edge of the corresponding first sub-stem part, and the distance L3 between the edge of the second step edge and the edge of the corresponding first sub-stem part is greater than the distance L4 between the second sub-edge and the edge of the corresponding first sub-stem part. 13.The touch substrate of claim 12, wherein, L1 and L3 are the same, L2 and L4 are the same, L2 is the same as the size of the opening, and L1=2*L2. The length of the edge part of the first step edge is 4 times the size of the opening, and the length of the edge part of the second step edge is 3 times the size of the opening. 14.The touch substrate of claim 11, wherein, The second stem part includes a second stem segment located between the first pattern part and the second pattern part and outside the middle of the touch area, the second stem segment is in the shape of a fold line bending towards the center of the touch area, the second branch part includes a third sub-branch, the third sub-branch extends from the second stem segment towards the inside and inserts into the gap area of the first touch electrode, and the depth is greater than or equal to 3 times the size of the opening. 15.The touch substrate of claim 1, wherein, The first touch electrode and the second touch electrode are both patterns symmetrical about a second center axis of the touch area, and are both patterns symmetrical about a first center axis of the touch area, the second center axis is a center axis parallel to the second direction, and the first center axis is a center axis parallel to the first direction. 16.The touch substrate of claim 1, wherein, The touch conductive layer includes a first conductive layer, a second conductive layer, and a touch insulating layer located between the first conductive layer and the second conductive layer, the first conductive layer includes the first touch electrode and the second touch electrode, the second conductive layer includes a bridge electrode, and the first pattern part and the second pattern part are connected through the bridge electrode.

17. A display device comprising the touch substrate according to any one of claims 1-16.

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