A touch substrate, a touch display panel and a touch display device

Abstract

The present application discloses a touch substrate, a touch display panel and a touch display device, which are used to transfer static electricity generated by friction on the surface of the touch substrate and eliminate the charge on the surface of the touch substrate. The present application provides a touch substrate, the touch substrate includes: a touch module, an electrostatic shielding layer located on one side of the touch module; the touch module includes: a plurality of touch electrodes; the pattern of at least some of the touch electrodes includes a hollow area; the touch module also includes a floating electrode located in the hollow area and insulated from the touch electrode; the electrostatic shielding layer includes: a plurality of electrostatic shielding electrodes, and a first electrostatic shielding connection lead connecting adjacent electrostatic shielding electrodes; the orthographic projection of the electrostatic shielding electrode on the touch module falls into the hollow area.

Description

Technical Field

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

[0002] When using an organic light-emitting diode display, the friction between fingers and the screen generates a large amount of static electricity. If the static electricity charge is transferred to the display substrate, it will cause the threshold voltage of the thin-film transistor switch in the display substrate to shift. Due to the difference in the luminous efficiency of the red, green and blue sub-pixels, the offset of sub-pixels of different colors will be different, which will eventually destroy the red, green and blue luminous ratio and affect the display effect. Summary of the invention

[0003] The embodiments of the present application provide a touch substrate, a touch display panel and a touch display device, which are used to transfer static electricity generated by friction on the surface of the touch substrate and eliminate the charge on the surface of the touch substrate.

[0004] An embodiment of the present application provides a touch control substrate, the touch control substrate comprising: a touch control module, an electrostatic shielding layer located on one side of the touch control module;

[0005] The touch module includes: a plurality of touch electrodes; the pattern of at least some of the touch electrodes includes a hollow area; the touch module also includes a floating electrode located in the hollow area and insulated from the touch electrodes;

[0006] The electrostatic shielding layer comprises: a plurality of electrostatic shielding electrodes, and a first electrostatic shielding connecting lead connecting adjacent electrostatic shielding electrodes;

[0007] The orthographic projection of the electrostatic shielding electrode on the touch module falls into the hollow area.

[0008] In some embodiments, at least one electrostatic shielding electrode corresponds to a hollow area.

[0009] In some embodiments, each hollow area corresponds to at least one electrostatic shielding electrode.

[0010] In some embodiments, the shape of the pattern of the electrostatic shielding electrode is similar to the shape of the hollow area.

[0011] In some embodiments, the orthographic projection of the electrostatic shielding electrode on the touch module coincides with the hollow area.

[0012] In some embodiments, the electrostatic shielding electrodes correspond to the hollow regions one by one.

[0013] In some embodiments, the plurality of touch electrodes include: a plurality of first touch electrodes and a plurality of second touch electrodes;

[0014] The touch module further includes: a plurality of first connecting parts and a plurality of second connecting parts; two adjacent first touch electrodes in the first direction are connected by the first connecting parts; two adjacent second touch electrodes in the second direction are connected by the second connecting parts; the first direction intersects the second direction;

[0015] Each first electrostatic shielding connection lead extends along the first direction or the second direction.

[0016] In some embodiments, the plurality of electrostatic shielding electrodes are divided into a plurality of electrostatic shielding electrode rows;

[0017] The extension direction of the electrostatic shielding electrode row is the same as the extension direction of the first electrostatic shielding connecting lead, and two adjacent electrostatic shielding electrodes in the plurality of electrostatic shielding electrode rows are connected by the first electrostatic shielding connecting lead.

[0018] In some embodiments, the touch substrate further includes: at least one ground terminal, and a plurality of connecting leads;

[0019] In each electrostatic shielding electrode row, the first electrostatic shielding electrode and the last electrostatic shielding electrode are respectively connected to the ground terminal through connecting leads.

[0020] In some embodiments, in the first electrostatic shielding electrode row and the last electrostatic shielding electrode row in the arrangement direction of the plurality of electrostatic shielding electrode rows, each electrostatic shielding electrode is connected to the ground terminal through a connecting lead.

[0021] In some embodiments, the hollow region includes a plurality of sub-hollow regions; the floating electrode includes a plurality of floating sub-electrodes located in the sub-hollow regions;

[0022] Each electrostatic shielding electrode includes electrostatic shielding sub-electrodes corresponding to the sub-hollow regions one by one;

[0023] The electrostatic shielding layer further includes: a second electrostatic shielding connection lead connecting adjacent electrostatic shielding sub-electrodes in each electrostatic shielding electrode.

[0024] In some embodiments, the material of the electrostatic shielding layer includes a transparent conductive material.

[0025] In some embodiments, the touch control substrate further includes: a cover plate located between the touch control module and the electrostatic shielding layer.

[0026] A touch display panel provided in an embodiment of the present application includes a touch substrate provided in an embodiment of the present application.

[0027] A touch display device provided in an embodiment of the present application includes the touch display panel provided in an embodiment of the present application.

[0028] The touch substrate, touch display panel and touch display device provided in the embodiments of the present application include an electrostatic shielding layer, the electrostatic shielding layer includes an electrostatic shielding electrode and a first electrostatic shielding lead connecting the electrostatic shielding electrode. When a large amount of static electricity is generated by friction between the user's finger and the touch substrate, the friction static electricity can be conducted away and released through the electrostatic shielding layer to eliminate the charge on the surface of the touch substrate. The influence of friction static electricity on the working stability of other components of the touch substrate can be avoided. When the touch substrate is applied to display products, the greening of the white screen caused by the threshold voltage shift of the thin film transistor switch caused by electrostatic charge can be avoided, and the display effect can be improved. And the positive projection of the electrostatic shielding electrode in the touch module falls into the hollow area, that is, the electrostatic shielding electrode and the touch electrode do not overlap each other, so that the electrostatic shielding electrode will not affect the signal transmission between the touch electrodes, and the friction static electricity can be released and eliminated through the electrostatic shielding layer while avoiding affecting the touch accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the structure of a touch control substrate provided in an embodiment of the present application;

[0031] Figure 2 The embodiment of the present application provides Figure 1 Cross-sectional view of AA';

[0032] Figure 3 A projection diagram of an electrostatic shielding layer provided in an embodiment of the present application;

[0033] Figure 4 The embodiment of the present application provides Figure 1 Cross-sectional view of middle BB';

[0034] Figure 5 The embodiment of the present application provides Figure 1 Cross-sectional view of CC';

[0035] Figure 6 A schematic diagram of the structure of a touch electrode provided in an embodiment of the present application;

[0036] Figure 7 A schematic diagram of the structure of an electrostatic shielding electrode provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. And in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in the field without creative work belong to the scope of protection of this application.

[0038] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. "First", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and other similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0039] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual proportions, but are only intended to illustrate the content of the present application. The same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions.

[0040] The present application embodiment provides a touch control substrate, such as Figure 1 to Figure 3 As shown, the touch substrate includes: a touch module 1, and an electrostatic shielding layer 2 located on one side of the touch module 1;

[0041] The touch module 1 includes: a plurality of touch electrodes 3; the pattern of at least some of the touch electrodes 3 includes a hollow area 4; the touch module 1 also includes a floating electrode 5 located in the hollow area 4 and insulated from the touch electrodes 3;

[0042] The electrostatic shielding layer 2 includes: a plurality of electrostatic shielding electrodes 6, and a first electrostatic shielding connection lead 7 connecting adjacent electrostatic shielding electrodes 6;

[0043] The orthographic projection of the electrostatic shielding electrode 6 on the touch module falls into the hollow area 4 .

[0044] The touch substrate provided in the embodiment of the present application includes an electrostatic shielding layer, and the electrostatic shielding layer includes an electrostatic shielding electrode and a first electrostatic shielding lead connecting the electrostatic shielding electrode. When a large amount of static electricity is generated by friction between the user's finger and the touch substrate, the friction static electricity can be conducted away and released through the electrostatic shielding layer to eliminate the charge on the surface of the touch substrate. The influence of friction static electricity on the working stability of other components of the touch substrate can be avoided. When the touch substrate is applied to display products, the greening of the white screen caused by the threshold voltage shift of the thin-film transistor switch caused by electrostatic charge can be avoided, and the display effect can be improved. And the positive projection of the electrostatic shielding electrode on the touch module falls into the hollow area, that is, the electrostatic shielding electrode and the touch electrode do not overlap each other, so that the electrostatic shielding electrode will not affect the signal transmission between the touch electrodes, and can avoid affecting the touch accuracy while achieving the conduction of friction static electricity through the electrostatic shielding layer.

[0045] It should be noted that Figure 1 Only a partial projection of the touch module is shown. Figure 2 for Figure 1 The cross-sectional view of AA', Figure 3 An orthographic projection of the electrostatic shield is shown.

[0046] It should be noted that the floating electrode is a structure that only has an electrode pattern and does not load an electrical signal to the electrode pattern during the operation of the touch substrate. When the touch substrate is applied to display products, the setting of the floating electrode can increase the capacitance of the overall touch electrode area including the hollow area, while ensuring display uniformity.

[0047] In some embodiments, Figure 2 As shown, the touch control substrate further includes: a cover plate 12 located between the touch control electrode 3 and the electrostatic shielding layer 2 .

[0048] That is, the electrostatic shielding layer in the touch control substrate provided in the embodiment of the present application is located on the side of the cover plate away from the touch control module, thereby preventing the cover plate from affecting the electrostatic shielding layer in transmitting the electrostatic charge generated by the touch control surface.

[0049] In some embodiments, Figure 2 As shown, the touch control substrate further includes: a first insulating layer 13 located between the cover plate 12 and the electrostatic shielding layer 2 , and an anti-fingerprint layer 14 located on a side of the electrostatic shielding layer 2 away from the first insulating layer 13 .

[0050] In a specific implementation, the surface of the anti-fingerprint layer facing away from the cover plate is the touch surface of the touch substrate.

[0051] The touch substrate provided in the embodiment of the present application is provided with an anti-fingerprint layer on the side of the electrostatic shielding layer away from the first insulating layer. When the touch substrate is applied to a display product, it can avoid residual traces of touch fingerprints on the surface of the display product, thereby avoiding affecting the display effect of the display product.

[0052] In some embodiments, Figure 1 , Figure 4 , Figure 5 As shown, the plurality of touch electrodes 3 include: a plurality of first touch electrodes 15 and a plurality of second touch electrodes 8;

[0053] The touch module also includes: a plurality of first connection parts 16 and a plurality of second connection parts 17; two adjacent first touch electrodes 15 in the first direction X are connected by the first connection parts 16; two adjacent second touch electrodes 8 in the second direction Y are connected by the second connection parts 17; the first direction X intersects the second direction Y.

[0054] In some embodiments, Figure 1 , Figure 4 , Figure 5 As shown, the first touch electrode 15, the second touch electrode 8, and the first connection portion 16 are arranged in the same layer; the second connection portion 17 and the second touch electrode 8 are located in a different layer, and the second connection portion 17 is a bridge connection portion.

[0055] In some embodiments, the first touch electrode and the first connecting portion are formed integrally.

[0056] In some embodiments, Figure 4 , Figure 5 As shown, the touch module 1 is arranged on one side of the substrate 11, the second connection portion 17 is located between the substrate 11 and the second touch electrode 8, and the touch module 1 further includes: a second insulating layer 10 located between the second connection portion 17 and the touch electrode 3, and a first protective layer 9 located on the side of the touch electrode 3 away from the substrate 11. The second touch electrode 8 is electrically connected to the second connection portion 17 through a via hole penetrating the second insulating layer 10.

[0057] During specific implementation, a first buffer layer may be further disposed between the substrate and the second connecting portion.

[0058] In some embodiments, the touch electrodes and the floating electrodes are both grid electrodes.

[0059] It should be noted that Figure 4 for Figure 1 The cross-sectional view of BB', Figure 5 for Figure 1 Cross-sectional view of CC'. Figure 1 In order to clearly illustrate the pattern and position of the orthographic projection of the second connecting portion, the projection of the second connecting portion is placed on the upper layer of the touch electrode for illustration.

[0060] In a specific implementation, the first touch electrode is, for example, a touch sensing electrode, and the second touch electrode is, for example, a touch driving electrode. An electric field is formed between the driving signal of the second touch electrode and the receiving signal of the first touch electrode. When a touch occurs, the capacitance between the second touch electrode and the first touch electrode decreases, so that the position where the touch occurs can be determined by using the change in capacitance between the second touch electrode and the first touch electrode.

[0061] It should be noted that if the electrostatic shielding electrode is set as a whole layer, the electrostatic shielding electrode and the touch electrode overlap, the finger and the electrostatic shielding electrode will form a first capacitor C1, and a second capacitor C2 will be formed between the electrostatic shielding electrode and the touch electrode. When there is a touch, only the capacitance value of the first capacitor C1 changes, and the capacitance value of the second capacitor C2 hardly changes, which eventually leads to touch failure or random touch reporting. However, in this application, since the positive projection of the electrostatic shielding electrode on the cover plate falls into the hollow area, that is, the electrostatic shielding electrode and the touch electrode do not overlap each other, the electrostatic shielding electrode and the touch electrode will not form a capacitor, and the signal transmission between the touch sensing electrode and the touch driving electrode can be carried out through the gap between the electrostatic shielding electrodes. The setting of the electrostatic shielding electrode will not shield the touch signal, thereby achieving the elimination of the electrostatic charge on the surface of the touch substrate while minimizing signal attenuation, ensuring the touch function and touch performance.

[0062] It should be noted that Figure 1 In the example, the pattern of the second touch electrode has a hollow area and the pattern of the first touch electrode does not have a hollow area. Of course, in a specific implementation, the pattern of the first touch electrode may have a hollow area and the pattern of the second touch electrode may not have a hollow area; or the patterns of the first touch electrode and the second touch electrode may both have a hollow area.

[0063] In some embodiments, at least one electrostatic shielding electrode corresponds to a hollow area.

[0064] In a specific implementation, one electrostatic shielding electrode may correspond to one hollow area, or multiple electrostatic shielding electrodes may correspond to one hollow area. Figure 1 , Figure 3 An example is given in which one electrostatic shielding electrode corresponds to one hollow area.

[0065] In some embodiments, electrostatic shielding electrodes are disposed in regions corresponding to some of the plurality of hollow regions.

[0066] Alternatively, in some embodiments, each hollow area corresponds to at least one electrostatic shielding electrode.

[0067] In the touch substrate provided in the embodiment of the present application, an electrostatic shielding electrode is arranged in the area corresponding to each hollow area, so that the number of the electrostatic shielding electrodes can be guaranteed while ensuring that the electrostatic shielding electrodes and the touch electrodes do not overlap with each other, and the static electricity generated by the friction between the finger and the touch substrate can be promptly conducted away and released.

[0068] In some embodiments, Figure 1 , Figure 3 As shown, the shape of the pattern of the electrostatic shielding electrode 6 is similar to the shape of the hollow area 4 .

[0069] In some embodiments, Figure 2 As shown, the orthographic projection of the electrostatic shielding electrode 6 on the touch module coincides with the hollow area 4 .

[0070] In the touch substrate provided in the embodiment of the present application, the electrostatic shielding electrode has an orthographic projection on the touch module that coincides with the hollow area, thereby maximizing the area of ​​the electrostatic shielding electrode corresponding to the hollow area while ensuring that the electrostatic shielding electrode and the touch electrode do not overlap each other, thereby promptly conducting away and releasing the static electricity generated by the friction between the finger and the touch substrate.

[0071] In some embodiments, the electrostatic shielding electrodes correspond to the hollow regions one by one.

[0072] The touch substrate provided in the embodiment of the present application, when the electrostatic shielding electrodes correspond to the hollow areas one by one, and the orthographic projection of the electrostatic shielding electrodes on the touch module coincides with the hollow areas, can ensure that the number and area of ​​the electrostatic shielding electrodes are maximized while ensuring that the electrostatic shielding electrodes and the touch electrodes do not overlap with each other, and promptly conduct away and release the static electricity generated by the friction between the finger and the touch substrate.

[0073] In some embodiments, each of the first electrostatic shielding connection leads extends along the first direction or the second direction.

[0074] That is, in the touch substrate provided in the embodiment of the present application, the first electrostatic shielding connecting lead connects two adjacent electrostatic shielding electrodes only in one of the first direction and the second direction, and the two adjacent electrostatic shielding electrodes in the other direction are not connected by the first electrostatic shielding connecting lead. Under the condition that the electrostatic shielding electrodes are turned on by the first electrostatic shielding connecting lead, the number of the first electrostatic shielding connecting leads can be reduced as much as possible to reduce the overlapping area of ​​the electrostatic shielding layer and the touch electrode, thereby avoiding the first electrostatic shielding connecting lead affecting the touch accuracy.

[0075] It should be noted that Figure 3 In the embodiment, the first electrostatic shielding connecting leads 7 extending along the first direction X are taken as an example for illustration.

[0076] In some embodiments, Figure 3As shown, the plurality of electrostatic shielding electrodes 6 are divided into a plurality of electrostatic shielding electrode rows 18;

[0077] The extension direction of the electrostatic shielding electrode row 18 is the same as the extension direction of the first electrostatic shielding connection lead 7 , and two adjacent electrostatic shielding electrodes 6 in the plurality of electrostatic shielding electrode rows 18 are connected by the first electrostatic shielding connection lead 7 .

[0078] That is, in the touch substrate provided by the embodiment of the present application, each electrostatic shielding electrode in the electrostatic shielding electrode row is connected through the electrostatic shielding connecting lead, so that the static electricity generated by the friction between the finger and the touch substrate can be conducted away and released through the electrostatic shielding electrode row. And because the first electrostatic shielding connecting lead overlaps with the touch electrode, only two electrostatic shielding electrodes adjacent to each other in the extension direction of the electrostatic shielding electrode row are connected through the first electrostatic shielding connecting lead, while two electrostatic shielding electrodes adjacent to each other in the arrangement direction of the electrostatic shielding electrode row are not connected through the first electrostatic shielding connecting lead. Under the condition that the static electricity generated by the friction between the finger and the touch substrate is conducted away through the electrostatic shielding electrode row, the number of the first electrostatic shielding connecting leads can be reduced as much as possible, the overlapping area of ​​the electrostatic shielding layer and the touch electrode can be reduced, and the first electrostatic shielding connecting lead can be avoided from affecting the touch accuracy.

[0079] It should be noted that Figure 3 In the embodiment, the first electrostatic shielding connecting leads 7 and the electrostatic shielding electrode arrays 18 extending along the first direction X are taken as an example for explanation. Figure 3 In the embodiment, the electrostatic shielding electrodes 6 in the electrostatic shielding electrode row 18 are sequentially arranged along the first direction X, and the electrostatic shielding electrode rows 18 are arranged along the second direction Y.

[0080] In some embodiments, Figure 3 As shown, the touch control substrate further includes: at least one ground terminal 19, and a plurality of connecting leads 20;

[0081] In each electrostatic shielding electrode row 18 , the first electrostatic shielding electrode 6 and the last electrostatic shielding electrode 6 are connected to the ground terminal 19 through the connecting lead wire 20 , respectively.

[0082] When static electricity is generated by friction on the touch surface of the touch substrate provided in the embodiment of the present application, the static electricity can be released through the ground terminal after passing through the static shielding layer, the connecting lead and the ground terminal, so as to eliminate the static electricity generated by friction on the touch surface.

[0083] It should be noted that Figure 3In the example, a touch control substrate includes a ground terminal surrounding multiple electrostatic shielding electrodes. Of course, in specific implementation, multiple ground terminals can also be set. As long as the interconnected electrostatic shielding electrodes are connected to the ground terminal through connecting leads, the electrostatic charge on the surface of the touch control substrate can be released and eliminated.

[0084] In a specific implementation, the connecting lead and the grounding terminal can be located on the same side of the cover plate as the electrostatic shielding layer. For example, the connecting lead can be arranged in the same layer and material as the electrostatic shielding electrode and the first electrostatic shielding connecting lead, that is, the electrostatic shielding layer also includes the connecting lead. The grounding terminal can also be arranged in the same layer and material as the electrostatic shielding electrode and the first electrostatic shielding connecting lead, that is, the electrostatic shielding layer also includes the grounding terminal. Of course, the connecting lead and the grounding terminal can also be made of a different material from the electrostatic shielding layer.

[0085] In some embodiments, Figure 3 As shown, in the first electrostatic shielding electrode row and the last electrostatic shielding electrode row in the arrangement direction of the plurality of electrostatic shielding electrode rows 18, each electrostatic shielding electrode 6 is respectively connected to the grounding terminal 19 via a connecting lead 20. In this way, the electrostatic charge generated on the surface of the touch substrate can be more quickly transmitted to the grounding terminal for release, thereby eliminating the charge on the surface of the touch substrate as quickly as possible.

[0086] It should be noted that Figure 1 In the example, the pattern of the touch electrode includes only one complete hollow area. Of course, in a specific implementation, the hollow area may include multiple sub-hollow areas, that is, the pattern of the touch electrode may also include multiple sub-hollow areas.

[0087] In some embodiments, Figure 6 As shown, the hollow area 4 includes a plurality of sub-hollow areas 21; the floating electrode 5 includes a plurality of floating sub-electrodes 22 located in the sub-hollow areas 21;

[0088] like Figure 7 As shown, each electrostatic shielding electrode 6 includes electrostatic shielding sub-electrodes 23 corresponding to the sub-hollow regions one by one;

[0089] The electrostatic shielding layer 2 further includes: a second electrostatic shielding connection lead 24 connecting adjacent electrostatic shielding sub-electrodes 23 in each electrostatic shielding electrode 6 .

[0090] In the touch control substrate provided in the embodiment of the present application, when the hollow area includes multiple sub-hollow areas, since the electrostatic shielding electrode corresponds to the hollow area, it is necessary to set an electrostatic shielding sub-electrode corresponding to the sub-hollow area. Since the electrostatic shielding sub-electrodes in the electrostatic shielding electrode are not connected to each other, the electrostatic shielding sub-electrodes can be connected by setting a second electrostatic shielding connecting lead.

[0091] In a specific implementation, the shape of the electrostatic shielding sub-electrode is similar to the shape of the corresponding sub-hollowing area. It can also be set so that the orthographic projection of the electrostatic shielding sub-electrode on the touch module coincides with the corresponding sub-hollowing area.

[0092] It should be noted that Figure 6 In the figure, only one embodiment of the pattern of the plurality of sub-hollow regions is illustrated. In specific implementation, when the hollow region includes a plurality of sub-hollow regions, the number and pattern of the sub-hollow regions can be selected according to actual needs.

[0093] It should be noted that Figure 1 , Figure 6 In the example, the four sides of the touch electrode contour are all straight lines. In a specific implementation, the contour of the touch electrode can have a concave-convex shape. For example, the contours of the first touch electrode and the second touch electrode both have a concave-convex shape, and the first touch electrode and the second touch electrode can be complementary between the orthographic projections of the substrate, so that a greater interaction can be formed between the first touch electrode and the second touch electrode, providing a touch signal amount in the touch process.

[0094] In some embodiments, the material of the electrostatic shielding layer includes a transparent conductive material.

[0095] In some embodiments, the transparent conductive material is indium tin oxide (ITO).

[0096] In some embodiments, the materials of the first buffer layer and the second insulating layer include, for example, silicon nitride (SiNx); the material of the touch electrode includes a titanium / aluminum / titanium stack; the material of the first protective layer includes polyimide (PI); the material of the first insulating layer includes silicon oxide; and the cover plate is a glass cover plate.

[0097] A touch display panel provided in an embodiment of the present application includes a touch substrate provided in an embodiment of the present application.

[0098] In a specific implementation, the touch display panel provided in the embodiment of the present application is, for example, an electroluminescent touch display panel. The touch display panel specifically includes: a substrate substrate located on the side of the substrate away from the touch electrode, a light-emitting device layer located between the substrate substrate and the substrate, and an encapsulation layer located between the light-emitting device layer and the substrate. In a specific implementation, the substrate is, for example, a buffer layer deposited on the encapsulation layer. That is, the present application adopts a flexible multi-layer integrated touch technology (Flexible MultiLayer On Cell, FMLOC) to form a first buffer layer, touch electrodes, etc. on the encapsulation layer.

[0099] In some embodiments, the light emitting device layer includes a plurality of light emitting devices arranged in an array, such as organic light emitting diode devices or quantum dot light emitting diode devices.

[0100] In some embodiments, the touch display panel also includes a driving layer located between the light-emitting device layer and the base substrate; the driving layer may include a pixel circuit for driving the light-emitting device to emit light, and the pixel circuit may specifically include a thin film transistor and a capacitor, and the light-emitting device may specifically include an anode, a light-emitting layer functional layer, and a cathode arranged in sequence.

[0101] The touch display panel provided in the embodiment of the present application includes the touch substrate provided in the embodiment of the present application, and the electrostatic shielding layer includes an electrostatic shielding electrode and a first electrostatic shielding lead connecting the electrostatic shielding electrode. When a large amount of static electricity is generated by friction between the user's finger and the touch display panel, the friction static electricity can be conducted away and released through the electrostatic shielding layer, thereby eliminating the charge on the surface of the touch substrate. This can prevent the electrostatic charge from being transmitted to the driving layer, causing the threshold voltage of the thin-film transistor switch of the driving layer to shift, causing the white screen of the touch display panel to turn green, and can improve the display effect of the touch display panel.

[0102] In some embodiments, the touch display panel has a display area, and the touch electrode is located in the display area. The touch display panel includes a plurality of sub-pixels arranged in an array in the display area. When the touch electrode is a grid electrode, the grid electrode includes a plurality of holes, and the orthographic projection of the hole on the substrate corresponds one-to-one to the orthographic projection of the sub-pixel on the substrate. In some embodiments, the orthographic projection of the sub-pixel light-emitting area on the substrate falls within the orthographic projection of the hole on the substrate. In this way, the touch electrode can be prevented from affecting the light output of the sub-pixel, thereby avoiding affecting the normal display of the touch display substrate. In a specific implementation, the plurality of sub-pixels include, for example, red sub-pixels, blue sub-pixels, and green sub-pixels. In a specific implementation, the shape of the grid electrode hole can correspond to the shape of the sub-pixel light-emitting area, for example, the shape of the hole is a quadrilateral, or the shape of the hole is approximately a quadrilateral, such as a rounded quadrilateral; or, the shape of the hole is a hexagon.

[0103] A touch display device provided in an embodiment of the present application includes the touch display panel provided in an embodiment of the present application.

[0104] In some embodiments, the touch display device includes a frame assembled with the touch display panel; the frame is in contact with the ground terminal.

[0105] Therefore, the touch display device provided in the embodiment of the present application can transfer electrostatic charge to the frame of the touch display device through the electrostatic shielding layer, connecting leads, and grounding terminals to release the electrostatic charge, thereby eliminating the electrostatic charge on the surface of the touch display device and avoiding the influence of electrostatic charge on touch accuracy.

[0106] The display device provided in the embodiment of the present application is any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a laptop computer, a digital photo frame, a navigator, etc. Other essential components of the display device should be understood by ordinary technicians in the field, and will not be described in detail here, nor should they be used as limitations on the present application. The implementation of the display device can refer to the above-mentioned embodiment of the display panel, and the repeated parts will not be described in detail.

[0107] In summary, the touch substrate, touch display panel and touch display device provided in the embodiments of the present application include an electrostatic shielding layer, the electrostatic shielding layer includes an electrostatic shielding electrode and a first electrostatic shielding lead connecting the electrostatic shielding electrode. When a large amount of static electricity is generated by friction between the user's finger and the touch substrate, the friction static electricity can be conducted away and released through the electrostatic shielding layer to eliminate the charge on the surface of the touch substrate. The influence of friction static electricity on the working stability of other components of the touch substrate can be avoided. When the touch substrate is applied to display products, the greening of the white screen caused by the threshold voltage shift of the thin film transistor switch caused by electrostatic charge can be avoided, and the display effect can be improved. And the positive projection of the electrostatic shielding electrode in the touch module falls into the hollow area, that is, the electrostatic shielding electrode and the touch electrode do not overlap each other, so that the electrostatic shielding electrode will not affect the signal transmission between the touch electrodes, and can release and eliminate the friction static electricity through the electrostatic shielding layer while avoiding affecting the touch accuracy.

[0108] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

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

Claims

1. A touch substrate, characterized in that: The touch control substrate comprises: a touch control module, and an electrostatic shielding layer located on one side of the touch control module; The touch control module comprises: a plurality of touch control electrodes; at least a part of the patterns of the touch control electrodes comprises a hollow area; the touch control module further comprises a floating electrode located in the hollow area and insulated from the touch control electrodes; The electrostatic shielding layer comprises: a plurality of electrostatic shielding electrodes, and a first electrostatic shielding connection lead connecting adjacent electrostatic shielding electrodes; The orthographic projection of the electrostatic shielding electrode on the touch module falls into the hollow area.

2. The touch substrate according to claim 1, characterized in that: At least one of the electrostatic shielding electrodes corresponds to one of the hollow areas.

3. The touch substrate according to claim 2, characterized in that: Each of the hollow areas corresponds to at least one of the electrostatic shielding electrodes.

4. The touch substrate according to claim 2 or 3, characterized in that: The shape of the pattern of the electrostatic shielding electrode is similar to the shape of the hollow area.

5. The touch substrate according to claim 4, characterized in that: The orthographic projection of the electrostatic shielding electrode on the touch module coincides with the hollow area.

6. The touch substrate according to claim 5, characterized in that: The electrostatic shielding electrodes correspond to the hollow areas one by one.

7. The touch control substrate according to any one of claims 1 to 3, 5 or 6, characterized in that: The plurality of touch electrodes include: a plurality of first touch electrodes and a plurality of second touch electrodes; The touch module further includes: a plurality of first connecting parts and a plurality of second connecting parts; two adjacent first touch electrodes in a first direction are connected through the first connecting parts; two adjacent second touch electrodes in a second direction are connected through the second connecting parts; the first direction intersects with the second direction; Each of the first electrostatic shielding connection leads extends along the first direction or the second direction.

8. The touch substrate according to claim 7, characterized in that: The plurality of electrostatic shielding electrodes are divided into a plurality of electrostatic shielding electrode rows; The extension direction of the electrostatic shielding electrode row is the same as the extension direction of the first electrostatic shielding connecting lead, and two adjacent electrostatic shielding electrodes in the plurality of electrostatic shielding electrode rows are connected by the first electrostatic shielding connecting lead.

9. The touch substrate according to claim 8, characterized in that: The touch control substrate further includes: at least one ground terminal, and a plurality of connecting leads; In each of the electrostatic shielding electrode rows, the first electrostatic shielding electrode and the last electrostatic shielding electrode are respectively connected to the ground terminal through the connecting lead.

10. The touch control substrate according to claim 9, characterized in that: In the first electrostatic shielding electrode row and the last electrostatic shielding electrode row in the arrangement direction of the plurality of electrostatic shielding electrode rows, each of the electrostatic shielding electrodes is connected to the ground terminal via the connecting lead.

11. The touch control substrate according to any one of claims 1 to 3, 5 or 6, and any one of claims 8 to 10, characterized in that: The hollow area includes a plurality of sub-hollow areas; the floating electrode includes a plurality of floating sub-electrodes located in the sub-hollow areas; Each of the electrostatic shielding electrodes comprises electrostatic shielding sub-electrodes corresponding one-to-one to the sub-hollow regions; The electrostatic shielding layer further includes: a second electrostatic shielding connection lead connecting adjacent electrostatic shielding sub-electrodes in each of the electrostatic shielding electrodes.

12. The touch control substrate according to any one of claims 1 to 3, 5 or 6, and any one of claims 8 to 10, characterized in that: The material of the electrostatic shielding layer includes a transparent conductive material.

13. The touch control substrate according to any one of claims 1 to 3, 5 or 6, and any one of claims 8 to 10, characterized in that: The touch control substrate further includes: a cover plate located between the touch control module and the electrostatic shielding layer.

14. A touch display panel, characterized in that: It comprises the touch control substrate according to any one of claims 1 to 13.

15. A touch display device, characterized in that: It comprises the touch display panel according to claim 14.

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