Touch display substrate and display device

Abstract

The present application provides a touch display substrate and a display device. The touch electrode layer in the touch display substrate includes a first electrode, a filling electrode and a second electrode arranged in the same layer. The auxiliary electrode layer includes a plurality of first auxiliary electrode blocks, the orthographic projection of the first auxiliary electrode block on the display substrate overlaps with the orthographic projection of the filling electrode on the display substrate, and overlaps with the orthographic projection of the first electrode on the display substrate; and / or, the auxiliary electrode layer includes a plurality of second auxiliary electrode blocks, the orthographic projection of the second auxiliary electrode block on the display substrate overlaps with the orthographic projection of the filling electrode on the display substrate, and overlaps with the orthographic projection of the second electrode on the display substrate. By arranging an auxiliary electrode layer above the touch and electrode layer, when the stylus or finger moves above the filling electrode, the touch signal can be transmitted through the capacitive channel between the auxiliary electrode layer and the first electrode, or between the auxiliary electrode layer and the second electrode, thereby ensuring the touch performance.

Description

Technical Field

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

[0002] With the rapid development of display technology, touch screen panels have gradually become popular in people's lives. At present, touch screens can be divided into add-on touch screens (Addon Mode Touch Panel), on-cell touch screens (OnCell Touch Panel), and in-cell touch screens (InCell Touch Panel) according to their composition structure.

[0003] In existing touch screens, in order to reduce the parasitic capacitance between the Tx / Rx electrodes and the cathode in the touch layer, a filling electrode (Dummy electrode) is provided between the Tx electrode and the Rx electrode. However, this reduces the area occupied by the Tx electrode and the Rx electrode, which affects the touch performance. Summary of the invention

[0004] In view of the shortcomings of the existing methods, the present application proposes a touch display substrate and a display device, aiming to solve the problem of poor touch performance of the existing touch display panel.

[0005] In a first aspect, an embodiment of the present application provides a touch display substrate, comprising:

[0006] Display substrate;

[0007] A touch layer, arranged on one side of the display substrate, comprising a touch electrode layer and an auxiliary electrode layer which are stacked, wherein the auxiliary electrode layer is located on a side of the touch electrode layer away from the display substrate;

[0008] The touch electrode layer includes a first electrode, a filling electrode and a second electrode arranged in the same layer, the filling electrode is located between the first electrode and the second electrode, and the filling electrode is insulated from the first electrode and the second electrode respectively;

[0009] The auxiliary electrode layer includes a plurality of first auxiliary electrode blocks, the orthographic projections of the first auxiliary electrode blocks on the display substrate overlap with the orthographic projections of the filling electrodes on the display substrate, and overlap with the orthographic projections of the first electrodes on the display substrate; and / or, the auxiliary electrode layer includes a plurality of second auxiliary electrode blocks, the orthographic projections of the second auxiliary electrode blocks on the display substrate overlap with the orthographic projections of the filling electrodes on the display substrate, and overlap with the orthographic projections of the second electrodes on the display substrate.

[0010] Optionally, the auxiliary electrode layer further includes a plurality of third auxiliary electrode blocks, the orthographic projections of the third auxiliary electrode blocks on the display substrate do not overlap with the orthographic projections of the filling electrodes on the display substrate, and the orthographic projections of the third auxiliary electrode blocks on the display substrate overlap with the orthographic projections of the first electrodes on the display substrate; and / or,

[0011] The auxiliary electrode layer also includes a plurality of fourth auxiliary electrode blocks, the orthographic projections of the fourth auxiliary electrode blocks on the display substrate do not overlap with the orthographic projections of the filling electrodes on the display substrate, and the orthographic projections of the fourth auxiliary electrode blocks on the display substrate overlap with the orthographic projections of the second electrodes on the display substrate.

[0012] Optionally, the touch control layer includes a protection layer disposed on a side of the touch control electrode layer away from the display substrate, and the auxiliary electrode layer is located on a side of the protection layer away from the display substrate.

[0013] Optionally, the touch layer includes a polarizer disposed on a side of the protective layer away from the display substrate, and the auxiliary electrode layer is integrally formed with the polarizer and is located on a side of the polarizer close to the protective layer.

[0014] Optionally, the touch layer includes an optical functional layer disposed on a side of the protective layer away from the display substrate, and the auxiliary electrode layer is integrally formed with the optical functional layer and is located on a side of the optical functional layer close to the protective layer.

[0015] Optionally, the touch control layer includes an optical functional layer disposed on a side of the protective layer away from the display substrate, and the auxiliary electrode layer is disposed on a side of the optical functional layer away from the protective layer.

[0016] Optionally, the material of the auxiliary electrode layer includes metal, and a light shielding layer is provided on a side of the auxiliary electrode block away from the display substrate.

[0017] Optionally, the touch layer includes an optical function layer disposed on a side of the protective layer away from the display substrate, and a black matrix is ​​disposed in the optical function layer;

[0018] The orthographic projection of the black matrix on the display substrate overlaps with the orthographic projection of the light shielding layer on the display substrate, and in the distribution direction of the auxiliary electrode blocks, the width of the light shielding layer is less than or equal to the width of the black matrix.

[0019] Optionally, the touch display substrate further includes a bridging electrode layer, and at least part of the first electrodes are electrically connected via the bridging electrode layer;

[0020] The bridging electrode layer is arranged on a side of the touch electrode layer close to the display substrate; or, the bridging electrode layer is arranged on a side of the touch electrode layer away from the display substrate and is arranged in the same layer as the auxiliary electrode layer.

[0021] In a second aspect, an embodiment of the present application provides a display device, including the touch display substrate in the embodiment of the present application.

[0022] The beneficial technical effects brought about by the technical solution provided by the embodiment of the present application include:

[0023] The touch display substrate in the embodiment of the present application includes a display substrate and a touch layer arranged on one side of the display substrate, the touch layer includes a touch electrode layer and an auxiliary electrode layer arranged in a stacked manner, and the touch electrode layer includes a first electrode, a filling electrode and a second electrode arranged in the same layer. The auxiliary electrode layer includes a plurality of first auxiliary electrode blocks, the orthographic projection of the first auxiliary electrode block on the display substrate overlaps with the orthographic projection of the filling electrode on the display substrate, and overlaps with the orthographic projection of the first electrode on the display substrate; and / or, the auxiliary electrode layer includes a plurality of second auxiliary electrode blocks, the orthographic projection of the second auxiliary electrode block on the display substrate overlaps with the orthographic projection of the filling electrode on the display substrate, and overlaps with the orthographic projection of the second electrode on the display substrate. By arranging the auxiliary electrode layer above the touch electrode layer, when the stylus or finger moves above the filling electrode, the touch signal can be transmitted through the capacitive channel between the auxiliary electrode layer and the first electrode, or between the auxiliary electrode layer and the second electrode, thereby avoiding poor touch signal transmission caused by small capacitance between the filling electrode and the first electrode, and between the filling electrode and the second electrode, and ensuring touch performance.

[0024] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0026] Figure 1 A top view of a touch electrode layer in a touch display substrate of the related art;

[0027] Figure 2 for Figure 1 Schematic diagram of the structure at the middle section AA;

[0028] Figure 3 A schematic diagram of a touch circuit of a touch display substrate of the related art;

[0029] Figure 4A top view of a touch electrode layer and an auxiliary electrode layer in a touch display substrate provided in an embodiment of the present application;

[0030] Figure 5 The first touch display substrate provided in the embodiment of the present application is Figure 4 Schematic diagram of the cross-sectional structure at BB in the middle;

[0031] Figure 6 The second touch display substrate provided in the embodiment of the present application is Figure 4 Schematic diagram of the cross-sectional structure at BB in the middle;

[0032] Figure 7 The third touch display substrate provided in the embodiment of the present application is Figure 4 Schematic diagram of the cross-sectional structure at BB in the middle;

[0033] Figure 8 A schematic diagram of a touch circuit of a touch display substrate provided in an embodiment of the present application;

[0034] Fig. 9 The fourth touch display substrate provided in the embodiment of the present application is Figure 4 Schematic diagram of the cross-sectional structure at BB in the middle;

[0035] Fig.10 The fifth touch display substrate provided in the embodiment of the present application is Figure 4 Schematic diagram of the cross-sectional structure at BB in the middle;

[0036] Fig.11 The sixth touch display substrate provided in the embodiment of the present application is Figure 4 Schematic diagram of the cross-sectional structure at BB in the middle;

[0037] Fig.12 The seventh touch display substrate provided in the embodiment of the present application is Figure 4 Schematic diagram of the cross-sectional structure at BB in the middle;

[0038] Fig.13 A touch display substrate provided in an embodiment of the present application is Figure 4 Schematic diagram of the cross-sectional structure at CC in the middle;

[0039] Fig.14 Another touch display substrate provided in the embodiment of the present application is Figure 4 Schematic diagram of the cross-sectional structure at CC in the middle;

[0040] Fig.15 A schematic diagram of a process for manufacturing a touch display substrate provided in an embodiment of the present application;

[0041] Figures 16a to 16gA structural schematic diagram of different processes for manufacturing a first touch display substrate provided in an embodiment of the present application;

[0042] Figures 17a to 17d A structural schematic diagram of different processes for manufacturing a second touch display substrate provided in an embodiment of the present application;

[0043] Figures 18a to 18c A schematic diagram of a third method for manufacturing a touch display substrate according to an embodiment of the present application;

[0044] Figures 19a to 19c This is a structural schematic diagram of different processes for manufacturing a fourth touch display substrate provided in an embodiment of the present application.

[0045] In the figure:

[0046] 10-touch display substrate; 11-display substrate; 12-encapsulation layer; 13-touch layer;

[0047] 131-touch electrode layer; 132-auxiliary electrode layer; 1320-auxiliary electrode block; 1311-first electrode; 1312-second electrode; 1313-filling electrode; 1321-first auxiliary electrode block; 1322-second auxiliary electrode block; 1323-third auxiliary electrode block; 1324-fourth auxiliary electrode block; 133-bridging electrode layer;

[0048] 20 - insulating layer; 21 - polarizer; 22 - optical functional layer; 23 - black matrix; 24 - light shielding layer; 25 - optical adhesive; 26 - cover plate; 27 - protective layer; 28 - cathode; 29 - via. DETAILED DESCRIPTION

[0049] The present application is described in detail below, and examples of embodiments of the present application are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components with the same or similar functions. In addition, if the detailed description of the known technology is unnecessary for the features of the present application shown, it will be omitted. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present application.

[0050] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0051] The inventor of the present application considers that Figure 1 , Figure 2 and Figure 3 As shown, in the existing touch screen, the Tx / Rx electrodes are overlapped with the cathode 28. In order to reduce the Tx electrodes (i.e. Figure 2 The first electrode 1311), the Rx electrode (ie Figure 2 In order to reduce the parasitic capacitance between the second electrode 1312 in the Tx / Rx electrode and the cathode 28, it is necessary to reduce the overlapping area between the Tx / Rx electrode and the cathode 28, so a filling electrode 1313 (dummy electrode) is provided between the Tx electrode and the Rx electrode. However, after the dummy electrode is provided, the area ratio occupied by the Tx / Rx electrode is reduced. When the size of the stylus or finger is small and the position of the stylus or finger is located on the dummy electrode, the overlapping area between the dummy electrode and the Tx / Rx electrode is small (such as Figure 3 As shown, the dummy electrodes and Tx / Rx electrodes are only Figure 3 overlap in the horizontal direction in the ), so the capacitance between the dummy electrode and the Tx / Rx electrode ( Figure 3 Crx_dymmy and Ctx_dummy) are also small, which makes it difficult for the touch signal to be transmitted through the Tx / Rx electrodes. When the stylus or finger is above the dummy electrode, the touch sensing amount is small. When the stylus or finger slides from the dummy electrode to the Tx electrode or Rx electrode, the touch sensing amount fluctuates greatly (the touch signal is transmitted well when the stylus or finger is above the Tx / Rx electrode, and the touch sensing amount is large). Therefore, setting up the dummy electrode will affect the touch performance.

[0052] The touch display substrate 10 and the display device provided in the present application are intended to solve the above technical problems in the prior art.

[0053] The touch display substrate 10 and the display device provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0054] Combination Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the touch display substrate 10 in the embodiment of the present application includes:

[0055] Display substrate 11;

[0056] The touch layer 13 is disposed on one side of the display substrate 11, and includes a touch electrode layer 131 and an auxiliary electrode layer 132 which are stacked. The auxiliary electrode layer 132 is located on a side of the touch electrode layer 131 away from the display substrate 11;

[0057] The touch electrode layer 131 includes a first electrode 1311, a filling electrode 1313 and a second electrode 1312 arranged in the same layer, the filling electrode 1313 is located between the first electrode 1311 and the second electrode 1312, and the filling electrode 1313 is insulated from the first electrode 1311 and the second electrode 1312 respectively;

[0058] The auxiliary electrode layer 132 includes a plurality of first auxiliary electrode blocks 1321, the orthographic projections of the first auxiliary electrode blocks 1321 on the display substrate 11 overlap with the orthographic projections of the filling electrode 1313 on the display substrate 11, and overlap with the orthographic projections of the first electrode 1311 on the display substrate 11; and / or, the auxiliary electrode layer 132 includes a plurality of second auxiliary electrode blocks 1322, the orthographic projections of the second auxiliary electrode blocks 1322 on the display substrate 11 overlap with the orthographic projections of the filling electrode 1313 on the display substrate 11, and overlap with the orthographic projections of the second electrode 1312 on the display substrate 11.

[0059] Specifically, Figure 5 As shown, a packaging layer 12 is disposed on the display substrate 11, and a touch layer 13 is disposed on a side of the packaging layer 12 away from the display substrate 11. The touch layer 13 includes a plurality of layers extending from the display substrate 11 to the packaging layer 12. Figure 5 The touch electrode layer 131 and the auxiliary electrode layer 132 are sequentially stacked along the first direction. The touch electrode layer 131 includes a cathode ( Figure 51312) and the first electrode 1311, the filling electrode 1313 and the second electrode 1312. It should be noted that the first electrode 1311, the filling electrode 1313 and the second electrode 1312 are arranged in the same layer, that is, the first electrode 1311, the filling electrode 1313 and the second electrode 1312 are located in the same layer, and the first electrode 1311, the filling electrode 1313 and the second electrode 1312 can be formed by the same patterning process during the manufacturing process of the touch display substrate 10. Among them, the filling electrode 1313 is spaced from the first electrode 1311 and the second electrode 1312, respectively, so the filling electrode 1313 is insulated from the first electrode 1311 and the second electrode 1312, respectively. The first electrode 1311 can be used as a Tx electrode (Transmit, transmitting electrode), and the second electrode 1312 can be used as an Rx electrode (Receive, receiving electrode). When an active capacitive stylus is used (that is, the stylus is used as a transmitting electrode), the first electrode 1311 and the second electrode 1312 are both receiving electrodes.

[0060] like Figure 5 As shown, the auxiliary electrode layer 132 may include a plurality of first auxiliary electrode blocks 1321, the orthographic projection of the first auxiliary electrode block 1321 on the display substrate 11 overlaps with the orthographic projection of the filling electrode 1313 on the display substrate 11, and overlaps with the orthographic projection of the first electrode 1311 on the display substrate 11, that is, the first auxiliary electrode block 1321 overlaps with the filling electrode 1313 and the first electrode 1311 at the same time. Figure 5 and Figure 8 As shown, a capacitor Ctx_floating is formed between the first auxiliary electrode block 1321 and the first electrode 1311 (the capacitor is relatively large, usually reaching dozens or even hundreds of farads). When the stylus or finger is located above the filling electrode 1313 and covered by the first auxiliary electrode block 1321, the touch signal can be transmitted through the capacitive channel between the first auxiliary electrode block 1321 and the first electrode 1311, thereby avoiding the problem of difficult transmission of the touch signal when the first auxiliary electrode block 1321 is not set (when the first auxiliary electrode block 1321 is not set, the touch signal is transmitted through Cpen_dummy and Ctx_dummy, and Ctx_dummy is very small), thereby ensuring the touch performance. It should be noted that the overlapping area between the first auxiliary electrode block 1321 and the filling electrode 1313 can be adjusted according to actual conditions. The larger the overlapping area between the first auxiliary electrode block 1321 and the filling electrode 1313, the larger the effective touch area above the filling electrode 1313 (that is, the area where the touch signal can be effectively transmitted when the stylus or finger is located above the filling electrode 1313), which is more conducive to improving the touch performance.

[0061] like Figure 6As shown, the auxiliary electrode layer 132 may include a plurality of second auxiliary electrode blocks 1322, the orthographic projection of the second auxiliary electrode block 1322 on the display substrate 11 overlaps with the orthographic projection of the filling electrode 1313 on the display substrate 11, and overlaps with the orthographic projection of the second electrode 1312 on the display substrate 11, that is, the second auxiliary electrode block 1322 overlaps with the filling electrode 1313 and the second electrode 1312 at the same time. Figure 8 As shown, a capacitor Crx_floating (this capacitor is relatively large, usually reaching tens or even hundreds of farads) is formed between the second auxiliary electrode block 1322 and the second electrode 1312. When the stylus or finger is located above the filling electrode 1313 and covered with the second auxiliary electrode block 1322, the touch signal can be transmitted through the capacitive channel between the second auxiliary electrode block 1322 and the second electrode 1312, thereby avoiding the problem that the touch signal is difficult to transmit when the second auxiliary electrode block 1322 is not set (when the second auxiliary electrode block 1322 is not set, the touch signal is transmitted through Cpen_dummy and Crx_dummy, and Crx_dummy is very small), thereby ensuring the touch performance. The overlapping area of ​​the second auxiliary electrode block 1322 and the filling electrode 1313 can be adjusted according to actual conditions. The larger the overlapping area of ​​the second auxiliary electrode block 1322 and the filling electrode 1313, the larger the effective touch area above the filling electrode 1313, which is conducive to improving the touch performance.

[0062] Optionally, in the embodiments of the present application, Figure 7 As shown, the auxiliary electrode layer 132 may include a plurality of first auxiliary electrode blocks 1321 and a plurality of second auxiliary electrode blocks 1322 at the same time. The orthographic projection of the first auxiliary electrode block 1321 on the display substrate 11 overlaps with the orthographic projection of the filling electrode 1313 on the display substrate 11, and overlaps with the orthographic projection of the first electrode 1311 on the display substrate 11; the orthographic projection of the second auxiliary electrode block 1322 on the display substrate 11 overlaps with the orthographic projection of the filling electrode 1313 on the display substrate 11, and overlaps with the orthographic projection of the second electrode 1312 on the display substrate 11. By simultaneously arranging a plurality of first auxiliary electrode blocks 1321 and a plurality of second auxiliary electrode blocks 1322 in the auxiliary electrode layer 132, the area covered by the auxiliary electrode layer 132 above the filling electrode 1313 can be increased to the maximum extent, that is, the area of ​​the effective touch area above the filling electrode 1313 is increased, and the poor transmission of the touch signal when the stylus or finger is located above the filling electrode 1313 is avoided, thereby ensuring the touch performance.

[0063] See also Figure 7It should be noted that when the auxiliary electrode layer 132 includes both the first auxiliary electrode block 1321 and the second auxiliary electrode block 1322, the first auxiliary electrode block 1321 and the second auxiliary electrode block 1322 are spaced apart, so that the first auxiliary electrode block 1321 can overlap only with the first electrode 1311, and the second auxiliary electrode block 1322 can overlap only with the second electrode 1312, that is, each auxiliary electrode block 1320 can overlap only with one of the first electrode 1311 and the second electrode 1312, thereby improving the accuracy of touch signal transmission (the touch signal is transmitted through the capacitor channel between the auxiliary electrode block 1320 and the first electrode 1311, or the touch signal is transmitted through the capacitor channel between the auxiliary electrode block 1320 and the second electrode 1312).

[0064] In the embodiments of the present application, optionally, Fig. 9 As shown, the auxiliary electrode layer 132 also includes a plurality of third auxiliary electrode blocks 1323, the orthographic projection of the third auxiliary electrode block 1323 on the display substrate 11 does not overlap with the orthographic projection of the filling electrode 1313 on the display substrate 11, and the orthographic projection of the third auxiliary electrode block 1323 on the display substrate 11 overlaps with the orthographic projection of the first electrode 1311 on the display substrate 11; and / or, the auxiliary electrode layer 132 also includes a plurality of fourth auxiliary electrode blocks 1324, the orthographic projection of the fourth auxiliary electrode block 1324 on the display substrate 11 does not overlap with the orthographic projection of the filling electrode 1313 on the display substrate 11, and the orthographic projection of the fourth auxiliary electrode block 1324 on the display substrate 11 overlaps with the orthographic projection of the second electrode 1312 on the display substrate 11.

[0065] Specifically, Fig. 9 As shown, in the embodiment of the present application, the auxiliary electrode layer 132 also includes a plurality of third auxiliary electrode blocks 1323, and the orthographic projection of the third auxiliary electrode block 1323 on the display substrate 11 does not overlap with the orthographic projection of the filling electrode 1313 on the display substrate 11, and the orthographic projection of the third auxiliary electrode block 1323 on the display substrate 11 overlaps with the orthographic projection of the first electrode 1311 on the display substrate 11. Therefore, it is avoided that the appearance of the touch display substrate 10 is affected only when the auxiliary electrode layer 132 is set above the filling electrode 1313 (there is no auxiliary electrode layer 132 above the first electrode 1311 and the second electrode 1312) (the visualization effect of the touch display substrate 10 is improved). Fig. 9As shown, optionally, in an embodiment of the present application, the auxiliary electrode layer 132 also includes a plurality of fourth auxiliary electrode blocks 1324, the orthographic projection of the fourth auxiliary electrode block 1324 on the display substrate 11 does not overlap with the orthographic projection of the filling electrode 1313 on the display substrate 11, and the orthographic projection of the fourth auxiliary electrode block 1324 on the display substrate 11 overlaps with the orthographic projection of the second electrode 1312 on the display substrate 11, and the setting of the fourth auxiliary electrode block 1324 can further improve the visualization effect of the touch display substrate 10.

[0066] Optional, such as Fig. 9 As shown, the auxiliary electrode layer 132 includes a plurality of third auxiliary electrode blocks 1323 and a plurality of fourth auxiliary electrode blocks 1324. Therefore, the first electrode 1311 and the second electrode 1312 can be covered with the auxiliary electrode layer 132, thereby improving the visualization effect of the touch display substrate 10 to the greatest extent. The distance between the plurality of auxiliary electrode blocks in the auxiliary electrode layer 132 can be adjusted according to actual conditions.

[0067] In the embodiments of the present application, Fig. 9 and Fig.10 As shown, the touch layer 13 includes a protective layer 27 disposed on a side of the touch electrode layer 131 away from the display substrate 11, and the auxiliary electrode layer 132 is located on a side of the protective layer 27 away from the display substrate 11. The material of the protective layer 27 includes a material with good insulation performance, and the protective layer 27 covers the touch electrode layer 131 to prevent electrostatic interference from affecting the touch performance. By disposing the auxiliary electrode layer 132 on the side of the protective layer 27 away from the display substrate 11, it is possible to ensure that the auxiliary electrode layer 132 and the touch electrode layer 131 are insulated, and a capacitive channel for transmitting touch signals is formed between the auxiliary electrode layer 132 and the touch electrode layer 131.

[0068] Optional, such as Figure 5 , Figure 6 and Figure 7As shown, in the embodiment of the present application, the touch layer 13 includes a polarizer 21 disposed on a side of the protective layer 27 away from the display substrate 11, and the auxiliary electrode layer 132 is integrally formed with the polarizer 21 and is located on a side of the polarizer 21 close to the protective layer 27. Specifically, during the manufacturing process of the touch display substrate 10, the auxiliary electrode layer 132 is made on the polarizer 21 by a transfer process (therefore, the auxiliary electrode layer 132 and the polarizer 21 are integrated in structure), and then the polarizer 21 is attached to the protective layer 27. Optionally, the polarizer 21 is attached to the protective layer 27 by an optical adhesive 25. Since the optical adhesive 25 is transparent, it improves the structural stability while avoiding affecting the display effect. By disposing the auxiliary electrode layer 132 on the side of the polarizer 21 close to the protective layer 27 , the distance between the auxiliary electrode layer 132 and the touch electrode layer 131 can be reduced, and the capacitance between the auxiliary electrode layer 132 and the touch electrode layer 131 can be increased, thereby improving the touch performance of the touch display substrate 10 .

[0069] Optional, such as Fig.10 As shown, in the embodiment of the present application, the touch layer 13 includes an optical functional layer 22 arranged on the side of the protective layer 27 away from the display substrate 11, and the auxiliary electrode layer 132 is integrally formed with the optical functional layer 22 and is located on the side of the optical functional layer 22 close to the protective layer 27. Specifically, the optical functional layer 22 is formed by COE (Color Filter on Encapsulation) technology, that is, the optical functional layer 22 integrates the functions of the color filter, the black matrix and the polarizer at the same time, so the polarizer can be removed to reduce the thickness of the touch display substrate 10. In the manufacturing process of the touch display substrate 10, the auxiliary electrode layer 132 is manufactured on the side of the protective layer 27 away from the display substrate 11 through a patterning process, and then the optical functional layer 22 is manufactured on the side of the protective layer 27 away from the display substrate 11, and the optical functional layer 22 covers the auxiliary electrode layer 132 and the protective layer 27. By arranging the auxiliary electrode layer 132 on the side of the optical functional layer 22 close to the protective layer 27 , the distance between the auxiliary electrode layer 132 and the touch electrode layer 131 can be reduced, and the capacitance between the auxiliary electrode layer 132 and the touch electrode layer 131 can be increased, thereby improving the touch performance of the touch display substrate 10 .

[0070] like Fig.11As shown, in the embodiment of the present application, the touch layer 13 includes an optical function layer 22 disposed on a side of the protective layer 27 away from the display substrate 11, and the auxiliary electrode layer 132 is disposed on a side of the optical function layer 22 away from the protective layer 27. Specifically, during the manufacturing process of the touch display substrate 10, the optical function layer 22 can be firstly bonded to the protective layer 27, and then the auxiliary electrode layer 132 can be manufactured on the side of the optical function layer 22 away from the protective layer 27 through a patterning process, so the manufacturing of the auxiliary electrode layer 132 is relatively easy.

[0071] Specifically, the material of the auxiliary electrode layer 132 in the embodiment of the present application can be adjusted according to actual conditions, such as Fig.12 As shown, the material of the auxiliary electrode layer 132 includes metal, and a light shielding layer 24 is provided on the side of the auxiliary electrode block 1320 away from the display substrate 11, that is, the surface of the auxiliary electrode block 1320 is provided with a light shielding layer 24, and the orthographic projection of the light shielding layer 24 on the display substrate 11 overlaps with the orthographic projection of the auxiliary electrode block 1320 on the display substrate 11. When the auxiliary electrode layer 132 is made of metal material, the conductive property is good, which is conducive to improving the touch performance of the touch display substrate 10. The light shielding layer 24 is made of a material with a high light absorption rate, so it can avoid the auxiliary electrode layer 132 from reflecting light when it is made of metal material, reducing the impact on the appearance of the touch display substrate 10. The size of the light shielding layer 24 can be determined according to actual conditions.

[0072] Optionally, a black matrix 23 is provided in the optical function layer 22, in the distribution direction of the auxiliary electrode blocks 1320 ( Fig.12 In the second direction), the orthographic projection of the black matrix 23 on the display substrate 11 overlaps with the orthographic projection of the light shielding layer 24 on the display substrate 11, and the width of the light shielding layer 24 is less than or equal to the width of the black matrix 23 (the orthographic projection of the light shielding layer 24 on the display substrate 11 falls within the orthographic projection of the black matrix 23 on the display substrate 11). Therefore, when the size of the light shielding layer 24 is too large, the light transmittance of the touch display substrate 10 is reduced, and the display effect is guaranteed (when the width of the light shielding layer 24 exceeds the width of the black matrix 23, the light shielding layer 24 will block the light emitted by the display substrate 11). It should be noted that the touch electrode layer is in a grid shape, and pixels are set in the middle of the grid. To avoid blocking light, the position of the black matrix 23 corresponds to the position of the touch electrode layer 131, that is, the orthographic projection of the black matrix 23 on the display substrate 11 overlaps with the orthographic projection of the touch electrode layer 131 on the display substrate 11.

[0073] Optionally, in an embodiment of the present application, the material of the auxiliary electrode layer 132 includes a transparent conductive material, specifically, the transparent conductive material can be a material with good conductivity and light transmittance, such as indium tin oxide (ITO) and indium zinc oxide (IZO). Therefore, while ensuring the touch performance, the influence of the auxiliary electrode layer 132 on the appearance of the touch display substrate 10 is reduced.

[0074] It should be noted that when the auxiliary electrode layer 132 is made of metal material, in order to prevent affecting the transmittance of the display substrate, the auxiliary electrode layer 132 is set in a grid shape. By setting the auxiliary electrode layer 132 in a grid shape, the grid can correspond to one or more sub-pixel units, so as to avoid the auxiliary electrode layer 132 blocking the light output of the sub-pixel unit. When the auxiliary electrode layer 132 is made of transparent material, since it does not need to be made into a grid shape, the area of ​​the auxiliary electrode layer 132 can be made larger, that is, the area occupied by the auxiliary electrode block 1320 is also larger, thereby increasing the capacitance formed between the stylus or finger and the auxiliary electrode block 1320, which is conducive to improving the touch performance.

[0075] Optionally, in an embodiment of the present application, the touch display substrate 11 further includes a bridging electrode layer 133, and at least part of the first electrode 1311 is electrically connected through the bridging electrode layer 133; the bridging electrode layer 133 is arranged on a side of the touch electrode layer 131 close to the display substrate 11; or, the bridging electrode layer 133 is arranged on a side of the touch electrode layer 131 away from the display substrate 11 and is arranged on the same layer as the auxiliary electrode layer 131.

[0076] Specifically, Fig.13 As shown, an insulating layer 20 and a bridging electrode layer 133 are provided on the encapsulation layer 12 of the display substrate 11. The two first electrodes 1311 insulated from each other are electrically connected through the bridging electrode layer 133 to improve the touch function. The first electrode 1311 and the bridging electrode layer 133 can be electrically connected through the via 29. In the manufacturing process of the touch display substrate 10, after the encapsulation layer 12 is manufactured, the bridging electrode layer 133 is manufactured on the encapsulation layer 12 through a patterning process, and then the insulating layer 20 is manufactured, and the insulating layer 20 covers the encapsulation layer 12 and the bridging electrode layer 133.

[0077] Optional, combined Figure 4 , Fig.10 and Fig.14As shown, the bridging electrode layer 133 is arranged on the side of the protective layer 27 away from the display substrate 11. In the process of manufacturing the touch display substrate 11, after the protective layer 27 is manufactured, the bridging electrode layer 27 and the auxiliary electrode layer 131 can be formed on the side of the protective layer 27 away from the display substrate 11 through a composition process, that is, the bridging electrode layer 133 and the auxiliary electrode layer 131 are arranged on the same layer, thereby simplifying the manufacturing process of the touch display substrate 11.

[0078] Based on the same inventive concept, the embodiment of the present application also provides a display device, which includes the above-mentioned touch display substrate 10 provided in the embodiment of the present application. Since the display device includes the above-mentioned touch display substrate 10 provided in the embodiment of the present application, the display device has the same beneficial effects as the touch display substrate 10, which will not be described in detail here. The display device includes a mobile phone, a tablet computer, etc., which can be determined according to actual conditions.

[0079] The present application also introduces a method for manufacturing a touch display substrate 10. Fig.15 As shown, including:

[0080] S101, providing a display substrate;

[0081] S102, manufacturing a touch electrode layer on one side of the display substrate, the touch electrode layer comprising a first electrode, a filling electrode and a second electrode arranged in the same layer, the filling electrode being located between the first electrode and the second electrode and being insulated from the first electrode and the second electrode respectively;

[0082] S103. An auxiliary electrode layer is fabricated on a side of the touch electrode layer away from the display substrate, wherein the auxiliary electrode layer comprises a plurality of first auxiliary electrode blocks, wherein the orthographic projections of the first auxiliary electrode blocks on the display substrate overlap with the orthographic projections of the filling electrodes on the display substrate, and overlap with the orthographic projections of the first electrodes on the display substrate; and / or, the auxiliary electrode layer comprises a plurality of second auxiliary electrode blocks, wherein the orthographic projections of the second auxiliary electrode blocks on the display substrate overlap with the orthographic projections of the filling electrodes on the display substrate, and overlap with the orthographic projections of the second electrodes on the display substrate.

[0083] In the manufacturing method of the touch display substrate 10 provided in the embodiment of the present application, by setting an auxiliary electrode layer 132 above the touch electrode layer, when the stylus or finger moves above the filling electrode 1313, the touch signal can be transmitted through the capacitive channel between the auxiliary electrode layer 132 and the first electrode 1311, or between the auxiliary electrode layer 132 and the second electrode 1312, thereby avoiding poor touch signal transmission caused by the small capacitance between the filling electrode 1313 and the first electrode 1311 or the second electrode 1312, thereby ensuring touch performance.

[0084] Optionally, in a specific implementation, the auxiliary electrode layer 132 is formed on a side of the touch electrode layer 131 away from the display substrate 11, including:

[0085] providing a polarizing film;

[0086] The auxiliary electrode layer is fabricated on the polarizer by a transfer process;

[0087] The polarizer is attached to the side of the touch electrode layer away from the display substrate, and the auxiliary electrode layer is located on the side of the polarizer close to the touch electrode layer; or,

[0088] Providing an optical functional layer;

[0089] Fabricating an auxiliary electrode layer on the optical functional layer by a transfer process;

[0090] The optical function layer is laminated to the side of the touch electrode layer away from the display substrate, and the auxiliary electrode layer is located on the side of the optical function layer close to the touch electrode layer.

[0091] Optionally, in another specific implementation, the auxiliary electrode layer 132 is formed on a side of the touch electrode layer 131 away from the display substrate 11, including:

[0092] Providing a polarizer, and attaching the polarizer to a side of the touch electrode layer away from the display substrate;

[0093] An auxiliary electrode layer is formed on the side of the polarizer away from the touch electrode layer by a patterning process; or,

[0094] Providing an optical functional layer, and attaching the optical functional layer to a side of the touch electrode layer away from the display substrate;

[0095] An auxiliary electrode layer is formed on a side of the optical functional layer away from the touch electrode layer through a patterning process.

[0096] The following is a detailed description of the manufacturing process of the touch display substrate 10 in the first embodiment of the present application in conjunction with the accompanying drawings. The patterning process in the embodiment of the present application includes the coating, exposure, development, etching and removal of part or all of the photoresist.

[0097] like Fig.16a As shown, a display substrate 11 is provided, and a packaging layer 12 is provided on one side of the display substrate 11. Specifically, the display substrate 11 can be an OLED display substrate.

[0098] like Fig.16b As shown, then, a touch electrode layer 131 is formed on a side of the encapsulation layer 12 away from the display substrate 11 by a patterning process. The touch electrode layer 131 includes a first electrode 1311 layer, a filling electrode 1313 layer, and a second electrode 1312 layer that are spaced apart from each other.

[0099] like Fig.16c As shown, next, a protection layer 27 is formed on a side of the touch electrode layer 131 away from the display substrate 11 . The material of the protection layer 27 includes a material with good insulation performance.

[0100] like Fig.16d As shown, a polarizer 21 is provided.

[0101] like Fig.16e As shown, next, the auxiliary electrode layer 132 is formed on the polarizer 21 through a transfer process.

[0102] like Fig.16f As shown, then, the polarizer 21 is laminated to the side of the protective layer 27 away from the display substrate 11, and the auxiliary electrode layer 132 is located on the side of the polarizer 21 close to the protective layer 27 (the auxiliary electrode layer 132 is facing downward during lamination).

[0103] like Figure 16g As shown, the cover plate 26 is then attached to the side of the polarizer 21 away from the display substrate 11 by means of the optical adhesive 25 to complete the manufacture of the touch display substrate 10 .

[0104] The following is a detailed description of the manufacturing process of the touch display substrate 10 in the second embodiment of the present application in conjunction with the accompanying drawings. It should be noted that in the second embodiment, the process of manufacturing the touch electrode layer 131 on one side of the display substrate 11 is the same as that in the first embodiment, and will not be repeated here.

[0105] like Fig.17a As shown, an optical function layer 22 is provided. The optical function layer 22 integrates the functions of a polarizer and a color filter. The specific manufacturing method of the optical function layer 22 is similar to the prior art and will not be described in detail here.

[0106] like Fig.17b As shown, next, the auxiliary electrode layer 132 is formed on the optical function layer 22 by a transfer process.

[0107] like Fig.17c As shown, then, the optical function layer 22 is laminated to the side of the protective layer 27 away from the display substrate 11, and the auxiliary electrode layer 132 is located on the side of the optical function layer 22 close to the protective layer 27 (the auxiliary electrode layer 132 is facing downward during lamination).

[0108] like Fig.17d As shown, the cover plate 26 is then attached to the side of the optical function layer 22 away from the display substrate 11 by means of the optical adhesive 25 to complete the manufacturing of the touch display substrate 10 .

[0109] The following is a detailed description of the manufacturing process of the touch display substrate 10 in the third embodiment of the present application in conjunction with the accompanying drawings. It should be noted that in the third embodiment, the process of manufacturing the touch electrode layer 131 on one side of the display substrate 11 is the same as that in the first embodiment, and will not be repeated here.

[0110] like Fig.18a As shown, a polarizer 21 is provided and attached to a side of the protective layer 27 away from the display substrate 11 .

[0111] like Fig.18b As shown, next, an auxiliary electrode layer 132 is formed on a side of the polarizer 21 away from the display substrate 11 through a patterning process.

[0112] like Fig.18c As shown, the cover plate 26 is then attached to the side of the polarizer 21 away from the display through the optical adhesive 25 to complete the manufacturing of the touch display substrate 10 .

[0113] The following is a detailed description of the manufacturing process of the touch display substrate 10 in the fourth embodiment of the present application in conjunction with the accompanying drawings. It should be noted that in the fourth embodiment, the process of manufacturing the touch electrode layer 131 on one side of the display substrate 11 is the same as that in the first embodiment, and will not be repeated here.

[0114] like Fig.19a As shown, an optical function layer 22 is provided (the optical function layer 22 integrates the functions of a polarizer and a color filter), and the optical function layer 22 is attached to a side of the protective layer 27 away from the display substrate 11 .

[0115] like Fig.19b As shown, next, an auxiliary electrode layer 132 is formed on a side of the optical function layer 22 away from the display substrate 11 through a patterning process.

[0116] like Fig.19c As shown, the cover plate 26 is then attached to the side of the optical functional layer 22 away from the display through the optical adhesive 25 to complete the manufacturing of the touch display substrate 10 .

[0117] By applying the embodiments of the present application, at least the following beneficial effects can be achieved:

[0118] 1. In the embodiment of the present application, by setting an auxiliary electrode layer 132 above the touch and electrode layer, when the stylus or finger moves above the filling electrode 1313, the touch signal can be transmitted through the capacitive channel between the auxiliary electrode layer 132 and the first electrode 1311, or between the auxiliary electrode layer 132 and the second electrode 1312, thereby avoiding poor touch signal transmission caused by the small capacitance between the filling electrode 1313 and the first electrode 1311, or between the filling electrode 1313 and the second electrode 1312, thereby ensuring touch performance.

[0119] 2. In the embodiment of the present application, by providing a plurality of third auxiliary electrode blocks 1323 and a plurality of fourth auxiliary electrode blocks 1324, the orthographic projection of the third auxiliary electrode block 1323 on the display substrate 11 does not overlap with the orthographic projection of the filling electrode 1313 on the display substrate 11, and the orthographic projection of the third auxiliary electrode block 1323 on the display substrate 11 overlaps with the orthographic projection of the first electrode 1311 on the display substrate 11, the orthographic projection of the fourth auxiliary electrode block 1324 on the display substrate 11 does not overlap with the orthographic projection of the filling electrode 1313 on the display substrate 11, and the orthographic projection of the fourth auxiliary electrode block 1324 on the display substrate 11 overlaps with the orthographic projection of the second electrode 1312 on the display substrate 11. Therefore, it is avoided that the appearance of the touch display substrate 10 is affected when the auxiliary electrode layer 132 is provided only above the filling electrode 1313 (there is no auxiliary electrode layer 132 above the first electrode 1311 and the second electrode 1312).

[0120] 3. In some embodiments of the present application, by setting the auxiliary electrode layer 132 on the side of the polarizer 21 close to the protective layer 27, the distance between the auxiliary electrode layer 132 and the touch electrode layer 131 can be reduced, and the capacitance between the auxiliary electrode layer 132 and the touch electrode layer 131 can be increased, thereby improving the touch performance of the touch display substrate 10.

[0121] 4. By replacing the polarizer 21 with the optical functional layer 22 integrating the functions of the color filter, the black matrix 23 and the polarizer 21, the thickness of the touch display substrate 10 is reduced, thereby achieving lightness and thinness.

[0122] 5. In the embodiment of the present application, by making the auxiliary electrode layer 132 a metal material, the conductive property of the auxiliary electrode layer 132 can be improved, which is beneficial to improving the touch performance. By providing a light shielding layer 24 on the side of the auxiliary electrode layer 132 away from the display substrate 11, it is possible to avoid the auxiliary electrode layer 132 from reflecting light when it is made of metal material, thereby reducing the impact on the appearance of the touch display substrate 10.

[0123] 6. In an embodiment of the present application, by making the width of the light-shielding layer 24 in the distribution direction of the auxiliary electrode blocks 1320 smaller than the width of the black matrix 23 in the optical functional layer 22 in the distribution direction of the auxiliary electrode blocks 1320, it is possible to avoid a reduction in the light transmittance of the touch display substrate 10 when the size of the light-shielding layer 24 is too large, thereby ensuring the display effect.

[0124] 7. In the embodiment of the present application, by using a transparent conductive material as the material of the auxiliary electrode layer 132 , the influence of the auxiliary electrode layer 132 on the appearance of the touch display substrate 10 can be reduced.

[0125] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0126] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0127] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0128] The above description is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A touch display substrate, characterized in that: include: Display substrate; A touch layer, arranged on one side of the display substrate, comprising a touch electrode layer and an auxiliary electrode layer which are stacked, wherein the auxiliary electrode layer is located on a side of the touch electrode layer away from the display substrate; The touch electrode layer includes a first electrode, a filling electrode and a second electrode arranged in the same layer, the filling electrode is located between the first electrode and the second electrode, and the filling electrode is insulated from the first electrode and the second electrode respectively; The auxiliary electrode layer includes a plurality of first auxiliary electrode blocks, the orthographic projections of the first auxiliary electrode blocks on the display substrate overlap with the orthographic projections of the filling electrodes on the display substrate, and overlap with the orthographic projections of the first electrodes on the display substrate; and / or, the auxiliary electrode layer includes a plurality of second auxiliary electrode blocks, the orthographic projections of the second auxiliary electrode blocks on the display substrate overlap with the orthographic projections of the filling electrodes on the display substrate, and overlap with the orthographic projections of the second electrodes on the display substrate.

2. The touch display substrate according to claim 1, characterized in that: The auxiliary electrode layer further includes a plurality of third auxiliary electrode blocks, the orthographic projections of the third auxiliary electrode blocks on the display substrate do not overlap with the orthographic projections of the filling electrodes on the display substrate, and the orthographic projections of the third auxiliary electrode blocks on the display substrate overlap with the orthographic projections of the first electrodes on the display substrate; and / or, The auxiliary electrode layer also includes a plurality of fourth auxiliary electrode blocks, the orthographic projections of the fourth auxiliary electrode blocks on the display substrate do not overlap with the orthographic projections of the filling electrodes on the display substrate, and the orthographic projections of the fourth auxiliary electrode blocks on the display substrate overlap with the orthographic projections of the second electrodes on the display substrate.

3. The touch display substrate according to claim 1, characterized in that: The touch control layer includes a protection layer disposed on a side of the touch control electrode layer away from the display substrate, and the auxiliary electrode layer is located on a side of the protection layer away from the display substrate.

4. The touch display substrate according to claim 3, characterized in that: The touch control layer includes a polarizer disposed on a side of the protective layer away from the display substrate. The auxiliary electrode layer is integrally formed with the polarizer and is located on a side of the polarizer close to the protective layer.

5. The touch display substrate according to claim 3, characterized in that: The touch control layer includes an optical function layer disposed on a side of the protective layer away from the display substrate, and the auxiliary electrode layer is integrally formed with the optical function layer and is located on a side of the optical function layer close to the protective layer.

6. The touch display substrate according to claim 3, characterized in that: The touch control layer includes an optical function layer disposed on a side of the protective layer away from the display substrate, and the auxiliary electrode layer is disposed on a side of the optical function layer away from the protective layer.

7. The touch display substrate according to any one of claims 1 to 6, characterized in that: The material of the auxiliary electrode layer includes metal, and a light shielding layer is provided on a side of the auxiliary electrode block away from the display substrate.

8. The touch display substrate according to claim 7, characterized in that: The touch layer includes a protective layer arranged on a side of the touch electrode layer away from the display substrate, the touch layer includes an optical function layer arranged on a side of the protective layer away from the display substrate, and a black matrix is ​​arranged in the optical function layer; The orthographic projection of the black matrix on the display substrate overlaps with the orthographic projection of the light shielding layer on the display substrate, and in the distribution direction of the auxiliary electrode blocks, the width of the light shielding layer is less than or equal to the width of the black matrix.

9. The touch display substrate according to any one of claims 1 to 6, characterized in that: The touch display substrate further comprises a bridging electrode layer, and at least part of the first electrodes are electrically connected via the bridging electrode layer; The bridging electrode layer is arranged on a side of the touch electrode layer close to the display substrate; or, the bridging electrode layer is arranged on a side of the touch electrode layer away from the display substrate and is arranged in the same layer as the auxiliary electrode layer.

10. A display device, characterized in that: The touch display substrate comprises the touch display substrate as claimed in any one of claims 1 to 9.

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