Touch display panel and display device

Abstract

The present disclosure provides a touch display panel and a display device. The touch display panel includes a display substrate and a touch substrate, the display substrate includes a plurality of regularly arranged sub-pixels, the touch substrate includes a plurality of touch electrodes, at least one touch electrode includes a touch-intensive area and a touch-sparse area, the touch-sparse area is located on at least one side of the touch-intensive area close to an adjacent touch electrode, and the number of sub-pixels contained in an area surrounded by at least one touch grid in the touch-intensive area is less than the number of sub-pixels contained in an area surrounded by at least one touch grid in the touch-sparse area. The present disclosure not only ensures touch accuracy, but also improves touch sensitivity, reporting rate, and signal-to-noise ratio by setting touch-intensive areas and touch-sparse areas in the touch electrodes, and the number of sub-pixels contained in the touch grids in the touch-intensive areas is less than the number of sub-pixels contained in the touch grids in the touch-sparse areas.

Description

Technical Field

[0001] The present disclosure relates to but is not limited to the field of display technology, and in particular to a touch display panel and a display device. Background Art

[0002] With the rapid development of display technology, touch technology has been applied to various electronic devices. According to the working principle, the touch screen of electronic devices can be divided into: capacitive, resistive, infrared, surface acoustic wave, electromagnetic, vibration wave induction and optical induction. Among them, capacitive touch substrate has the advantages of high sensitivity, long life, high light transmittance, etc., and is widely used in various display panels.

[0003] Based on the considerations of reducing resistance and improving sensitivity, the touch electrodes in the capacitive touch substrate are in the form of metal mesh. Compared with the touch electrodes formed by transparent conductive materials, metal mesh has the advantages of low resistance, small thickness and fast response speed. However, the inventors of this application have found that the existing touch display panels using metal mesh have the problem of low touch accuracy. Summary of the invention

[0004] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0005] The present disclosure provides a touch display panel and a display device to solve the problem of low touch accuracy in the existing structure.

[0006] On the one hand, the present disclosure provides a touch display panel, including a display substrate and a touch substrate arranged on the display substrate, the display substrate including a plurality of regularly arranged sub-pixels, the touch substrate including a plurality of touch electrodes, at least one touch electrode including a touch-intensive area and a touch-sparse area, the touch-sparse area being located on at least one side of the touch-intensive area close to an adjacent touch electrode, the number of sub-pixels contained in an area enclosed by at least one touch grid in the touch-intensive area being less than the number of sub-pixels contained in an area enclosed by at least one touch grid in the touch-sparse area, and the touch grid is a minimum grid formed by interweaving a plurality of metal wires and having a touch function.

[0007] In an exemplary embodiment, at least one floating dummy line is disposed in an area surrounded by at least one touch grid in the touch-sparse area, and the dummy line is electrically insulated from the touch grid.

[0008] In an exemplary embodiment, the metal lines constituting the touch grid are disposed between adjacent sub-pixels, and the dummy lines are disposed between adjacent sub-pixels.

[0009] In an exemplary embodiment, the dummy lines and the metal lines constituting the touch grid form a dummy grid, or a plurality of dummy lines are interwoven to form a dummy grid, and an area surrounded by the dummy grid includes at least one sub-pixel.

[0010] In an exemplary embodiment, the touch electrode includes a first touch electrode and a second touch electrode, a plurality of the first touch electrodes are arranged in sequence along a first direction, a plurality of the second touch electrodes are arranged in sequence along a second direction, adjacent first touch electrodes in the first direction are connected to each other through a first connecting portion, adjacent second touch electrodes in the second direction are connected to each other through a second connecting portion, and the first direction and the second direction intersect.

[0011] In an exemplary embodiment, at least one first touch electrode includes a first touch-dense area and a first touch-sparse area, and the first touch-sparse area is located on at least one side of the first touch-dense area close to the second touch electrode; the first touch-dense area includes a plurality of first touch grids, the first touch-sparse area includes a plurality of second touch grids, and the number of sub-pixels contained in at least one first touch grid is less than the number of sub-pixels contained in the second touch grid.

[0012] In an exemplary embodiment, along a direction away from the first touch-intensive area, a width of the first touch-sparse area is 50 μm to 200 μm.

[0013] In an exemplary embodiment, at least one second touch electrode 20 includes a second touch-dense area and a second touch-sparse area, and the second touch-sparse area is located on at least one side of the second touch-dense area close to the first touch electrode; the second touch-dense area includes a plurality of first touch grids, and the second touch-sparse area includes a plurality of second touch grids, and the number of sub-pixels contained in at least one first touch grid is less than the number of sub-pixels contained in the second touch grid.

[0014] In an exemplary embodiment, along a direction away from the second touch-intensive area, a width of the second touch-sparse area is 50 μm to 200 μm.

[0015] In an exemplary embodiment, a ratio of the number of sub-pixels included in the second touch grid to the number of sub-pixels included in the first touch grid is 2 to 4.

[0016] In an exemplary embodiment, the touch electrodes include third touch electrodes and fourth touch electrodes, a plurality of third touch electrodes and a plurality of fourth touch electrodes are alternately arranged along a first direction, a plurality of third touch electrodes and a plurality of fourth touch electrodes are sequentially arranged along a second direction, and the first direction intersects with the second direction; the touch substrate further includes a plurality of first connecting wires and a plurality of second connecting wires extending along the first direction, the first connecting wires and the second connecting wires are alternately arranged along the second direction, the third touch electrodes are connected to the first connecting wires, and the fourth touch electrodes are connected to the second connecting wires.

[0017] In an exemplary embodiment, at least one third touch electrode includes a third touch-dense area and a third touch-sparse area, and the position of the third touch-sparse area includes any one or more of the following: located on at least one side of the third touch-dense area close to the fourth touch electrode, located on at least one side of the third touch-dense area close to the first connecting line, and located on at least one side of the third touch-dense area close to the second connecting line; the third touch-dense area includes a plurality of third touch grids, the third touch-sparse area includes a plurality of fourth touch grids, and the number of sub-pixels contained in at least one third touch grid is less than the number of sub-pixels contained in the fourth touch grid.

[0018] In an exemplary embodiment, along a direction away from the third touch-intensive area, a width of the third touch-sparse area is 50 μm to 200 μm.

[0019] In an exemplary embodiment, at least one fourth touch electrode includes a fourth touch-dense area and a fourth touch-sparse area, and the position of the fourth touch-sparse area includes any one or more of the following: located on at least one side of the fourth touch-dense area close to the third touch electrode, located on at least one side of the fourth touch-dense area close to the first connecting line, and located on at least one side of the fourth touch-dense area close to the second connecting line; the fourth touch-dense area includes a plurality of third touch grids, the fourth touch-sparse area includes a plurality of fourth touch grids, and at least one third touch grid contains a smaller number of sub-pixels than the fourth touch grid.

[0020] In an exemplary embodiment, along a direction away from the fourth touch-intensive area, a width of the fourth touch-sparse area is 50 μm to 200 μm.

[0021] In an exemplary embodiment, a ratio of the number of sub-pixels included in the fourth touch grid to the number of sub-pixels included in the third touch grid is 2 to 4.

[0022] In an exemplary embodiment, at least one first connecting line includes a fifth touch-intensive area and a fifth touch-sparse area, and the position of the fifth touch-sparse area includes any one or more of the following: located on at least one side of the fifth touch-intensive area close to the third touch electrode, and located on at least one side of the fifth touch-intensive area close to the fourth touch electrode; the fifth touch-intensive area includes a plurality of fifth touch grids, the fifth touch-sparse area includes a plurality of sixth touch grids, and the number of sub-pixels contained in at least one fifth touch grid is less than the number of sub-pixels contained in the sixth touch grid.

[0023] In an exemplary embodiment, along a direction away from the fifth touch-intensive area, a width of the fifth touch-sparse area is 50 μm to 200 μm.

[0024] In an exemplary embodiment, at least one second connecting line includes a sixth touch-dense area and a sixth touch-sparse area, and the position of the sixth touch-sparse area may include any one or more of the following: located on at least one side of the sixth touch-dense area close to the third touch electrode, and located on at least one side of the sixth touch-dense area close to the fourth touch electrode; the sixth touch-dense area includes a plurality of fifth touch grids, the sixth touch-sparse area includes a plurality of sixth touch grids, and the number of sub-pixels contained in at least one fifth touch grid is less than the number of sub-pixels contained in the sixth touch grid.

[0025] In an exemplary embodiment, along a direction away from the sixth touch-intensive area, a width of the sixth touch-sparse area is 50 μm to 200 μm.

[0026] In an exemplary embodiment, a ratio of the number of sub-pixels included in the sixth touch grid to the number of sub-pixels included in the fifth touch grid is 2 to 4.

[0027] On the other hand, the present disclosure further provides a display device, comprising the aforementioned touch display panel.

[0028] The present disclosure provides a touch display panel and a display device, wherein a touch-dense area and a touch-sparse area are set in a touch electrode, the touch-sparse area is located in an edge area close to an adjacent touch electrode, and the number of sub-pixels contained in an area surrounded by a touch grid in the touch-dense area is smaller than the number of sub-pixels contained in an area surrounded by a touch grid in the touch-sparse area, thereby not only ensuring touch accuracy but also improving touch sensitivity, reporting rate and signal-to-noise ratio.

[0029] Other aspects will become apparent upon reading and understanding the drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the technical solution of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solution of the present disclosure and do not constitute a limitation on the technical solution of the present disclosure. The shapes and sizes of the components in the accompanying drawings do not reflect the actual proportions and are only intended to illustrate the contents of the present disclosure.

[0031] Figure 1 is a schematic structural diagram of a touch control substrate;

[0032] Figure 2 A schematic diagram of the structure of a metal grid touch substrate;

[0033] Figure 3 A schematic cross-sectional structure diagram of a touch display panel according to an exemplary embodiment of the present disclosure;

[0034] Figure 4 It is a schematic diagram of the planar structure of a display substrate panel;

[0035] Figure 5 A schematic diagram of a touch-intensive area on a touch display panel of an exemplary embodiment of the present disclosure;

[0036] Figure 6 A schematic diagram of a touch sparse area on a touch display panel according to an exemplary embodiment of the present disclosure;

[0037] Figure 7 A schematic plan view of a touch control substrate according to an exemplary embodiment of the present disclosure;

[0038] Figure 8 is a schematic diagram of a first touch grid according to an exemplary embodiment of the present disclosure;

[0039] Fig. 9 is a schematic diagram of a second touch grid according to an exemplary embodiment of the present disclosure;

[0040] Fig.10 It is a schematic structural diagram of a first touch electrode according to an exemplary embodiment of the present disclosure;

[0041] Fig.11 It is a schematic structural diagram of a second touch electrode according to an exemplary embodiment of the present disclosure;

[0042] Fig.12 It is a schematic plan view of another touch control substrate according to an exemplary embodiment of the present disclosure;

[0043] Fig.13 It is a schematic structural diagram of a third touch control electrode according to an exemplary embodiment of the present disclosure;

[0044] Fig.14 It is a schematic structural diagram of a fourth touch electrode according to an exemplary embodiment of the present disclosure.

[0045] Description of reference numerals:

[0046] 1—substrate; 10—first touch electrode; 11—first connecting portion;

[0047] 20—second touch electrode; 21—second connecting portion; 30—third touch electrode;

[0048] 31—first touch grid; 32—second touch grid; 33—third touch grid;

[0049] 34—fourth touch grid; 35—fifth touch grid; 36—sixth touch grid;

[0050] 40—fourth touch electrode; 41—first metal wire; 42—second metal wire;

[0051] 43—imaginary line; 50—imaginary grid; 61—first connection line;

[0052] 62—second connecting line; 63—third connecting portion; 70—dummy electrode;

[0053] 71 —first touch control insulating layer; 72 —first touch control metal layer; 73 —second touch control insulating layer;

[0054] 74—second touch metal layer; 75—touch protection layer; 101—first touch unit;

[0055] 102—first transmission line; 103—first pad; 110—first touch-intensive area;

[0056] 120—first touch sparse area; 130—third touch dense area; 140—third touch sparse area;

[0057] 150—fifth touch-intensive area; 160—fifth touch-sparse area; 201—second touch unit;

[0058] 202—second transmission line; 203—second pad; 210—second touch-intensive area;

[0059] 220—second touch sparse area; 230—fourth touch dense area; 240—fourth touch sparse area;

[0060] 250—the sixth touch-intensive area; 260—the sixth touch-sparse area. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be described in detail in conjunction with the accompanying drawings below. Note that the embodiments can be implemented in multiple different forms. A person of ordinary skill in the art can easily understand the fact that the methods and contents can be transformed into various forms without departing from the purpose and scope of the present disclosure. Therefore, the present disclosure should not be interpreted as being limited to the contents described in the following embodiments. In the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be arbitrarily combined with each other.

[0062] The proportions of the drawings in this disclosure can be used as a reference in the actual process, but are not limited to this. For example: the width-to-length ratio of the channel, the thickness and spacing of each film layer, the width and spacing of each signal line and touch line can be adjusted according to actual needs. The number of pixels in the display substrate, the number of sub-pixels in each pixel, the number of touch electrodes in the touch substrate, and the number of metal grids in each touch electrode are not limited to the numbers shown in the figures. The drawings described in this disclosure are only structural schematic diagrams, and one method of this disclosure is not limited to the shapes or values ​​shown in the drawings.

[0063] In the present specification, ordinal numbers such as “first”, “second” and “third” are provided to avoid confusion among constituent elements, and are not intended to limit the number.

[0064] In this specification, for the sake of convenience, the words and phrases indicating the orientation or positional relationship, such as "middle", "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., are used to illustrate the positional relationship of the constituent elements with reference to the drawings. This is only for the convenience of describing this specification and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. The positional relationship of the constituent elements is appropriately changed according to the direction in which each constituent element is described. Therefore, it is not limited to the words and phrases described in the specification, and can be appropriately replaced according to the situation.

[0065] In this specification, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate, or the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0066] In this specification, a transistor refers to an element including at least three terminals: a gate electrode, a drain electrode, and a source electrode. The transistor has a channel region between a drain electrode (drain electrode terminal, drain region, or drain electrode) and a source electrode (source electrode terminal, source region, or source electrode), and current can flow through the drain electrode, the channel region, and the source electrode. Note that in this specification, the channel region refers to a region where current mainly flows.

[0067] In this specification, the first electrode may be a drain electrode and the second electrode may be a source electrode, or the first electrode may be a source electrode and the second electrode may be a drain electrode. In the case of using transistors with opposite polarities or when the direction of current changes during circuit operation, the functions of the "source electrode" and the "drain electrode" are sometimes interchanged. Therefore, in this specification, the "source electrode" and the "drain electrode" may be interchanged.

[0068] In this specification, "electrical connection" includes the case where components are connected together through an element having some electrical function. There is no particular limitation on the "element having some electrical function" as long as it can transmit and receive electrical signals between the connected components. Examples of "element having some electrical function" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other elements having various functions.

[0069] In this specification, "parallel" means a state where the angle formed by two straight lines is greater than -10° and less than 10°, and therefore, also includes a state where the angle is greater than -5° and less than 5°. In addition, "perpendicular" means a state where the angle formed by two straight lines is greater than 80° and less than 100°, and therefore, also includes a state where the angle is greater than 85° and less than 95°.

[0070] In this specification, "film" and "layer" may be interchanged. For example, "conductive layer" may be replaced by "conductive film". Similarly, "insulating film" may be replaced by "insulating layer".

[0071] The triangles, rectangles, trapezoids, pentagons or hexagons in this specification are not in the strict sense, and may be approximate triangles, rectangles, trapezoids, pentagons or hexagons, etc. There may be some small deformations caused by tolerances, and there may be chamfers, arc edges and deformations.

[0072] The term "about" in the present disclosure refers to a numerical value that is not strictly limited to allow for process and measurement errors.

[0073] Capacitive touch substrates can be divided into mutual capacitance and self-capacitance structures. The mutual capacitance structure is composed of driving electrodes (Tx) and sensing electrodes (Rx) to form mutual capacitance, and the change of mutual capacitance is used for position detection. The self-capacitance structure is composed of touch electrodes and the human body to form self-capacitance, and the change of self-capacitance is used for position detection. The self-capacitance touch substrate is a single conductive layer structure with the characteristics of low power consumption and simple structure. The mutual capacitance touch substrate is a multi-conductive layer structure with the characteristics of multi-touch.

[0074] Figure 1 FIG. 1 is a schematic diagram of the structure of a touch control substrate. Figure 1 As shown, on a plane parallel to the touch substrate, the touch substrate may include a plurality of first touch units 101 and a plurality of second touch units 201, the first touch units 101 have a strip shape extending along a first direction D1, the plurality of first touch units 101 are sequentially arranged along a second direction D2, the second touch units 201 have a strip shape extending along the second direction D2, the plurality of second touch units 201 are sequentially arranged along the first direction D1, and the first direction D1 intersects with the second direction D2.

[0075] In an exemplary embodiment, the first touch unit 101 may include a plurality of first touch electrodes 10 and a plurality of first connecting portions 11 sequentially arranged in a first direction D1, and the plurality of first touch electrodes 10 and the plurality of first connecting portions 11 are alternately arranged and sequentially connected. The second touch unit 201 may include a plurality of second touch electrodes 20 sequentially arranged in a second direction D2, the plurality of second touch electrodes 20 are arranged at intervals, and the second touch electrodes 20 adjacent to each other in the second direction D2 are connected to each other through the second connecting portions 21. The film layer where the second connecting portions 21 are located is different from the film layer where the first touch electrodes 10 and the second touch electrodes 20 are located. The first touch electrodes 10 and the second touch electrodes 20 are alternately arranged in a third direction D3, and the third direction D3 intersects the first direction D1 and the second direction D2.

[0076] In an exemplary embodiment, each first touch unit 101 may be connected to the first pad 103 via a first transmission line 102, and each second touch unit 201 may be connected to the second pad 203 via a second transmission line 202. In an exemplary embodiment, the first touch electrode 10 may be connected to a driver (not shown) via the first pad 103, and the second touch electrode 20 may be connected to the driver via the second pad 203, and the driver may apply a driving signal to the second touch electrode 20, and receive an output signal from the first touch electrode 10, thereby forming a stable capacitance between the first touch electrode 10 and the second touch electrode 20. When a finger or an active pen touches the touch screen, the touch causes the capacitance between the first touch electrode 10 and the second touch electrode 20 to change, thereby determining the touch position and implementing a corresponding touch operation. In some possible implementations, the driver may apply a driving signal to the first touch electrode 10, and receive an output signal from the second touch electrode 20.

[0077] In an exemplary embodiment, the shapes of the first touch electrode 10 and the second touch electrode 20 may be any one or more of a triangle, a square, a rectangle, a trapezoid, a parallelogram, a rhombus, a pentagon, a hexagon, and other polygons, which are not limited in the present disclosure. For example, the shapes of the first touch electrode 10 and the second touch electrode 20 may be a rhombus.

[0078] In an exemplary embodiment, the first touch electrode 10 and the second touch electrode 20 may be in the form of a metal mesh, and the metal mesh may include a plurality of mesh patterns formed by interweaving a plurality of metal wires, and the line width of the metal wire may be less than or equal to 5 μm. In an exemplary embodiment, the shape of the mesh pattern surrounded by metal wires may include any one or more of triangles, squares, rectangles, rhombuses, trapezoids, pentagons, and hexagons. In some possible implementations, the mesh pattern surrounded by metal wires may be a regular shape or an irregular shape, and the edges of the mesh pattern may be straight lines or curves, which are not limited in the present disclosure. The touch electrode is in the form of a metal mesh, which has the advantages of low resistance, thin thickness, fast response speed, lightness, and foldability.

[0079] Figure 2 is a schematic diagram of the structure of a metal grid touch substrate. Figure 1 The enlarged area of ​​the A region in the middle. In an exemplary embodiment, the touch substrate may include a plurality of touch electrodes and dummy electrodes, wherein the touch electrodes refer to electrodes to which voltage can be applied electrically, and the metal wires constituting the touch electrodes are connected to the transmission lines, and the dummy electrodes refer to electrodes to which voltage is not applied electrically, and the metal wires constituting the dummy electrodes are disconnected from the transmission lines. Figure 2The metal grid shown can form two first touch electrodes 10, two second touch electrodes 20 and a dummy electrode 70. The dummy electrode 70 can be in an "X" shape to isolate the first touch electrode 10 from the second touch electrode 20. The two first touch electrodes 10 can be respectively located on both sides of the first direction D1 of the dummy electrode 70 and connected to each other through the first connecting portion 11. The two second touch electrodes 20 can be respectively located on both sides of the second direction D2 of the dummy electrode 70 and connected to each other through the second connecting portion 21.

[0080] The inventor of the present application has found through research that the existing touch display panel in the form of a metal grid has the problem of low touch accuracy, which is largely caused by the dummy electrode set between the first touch electrode and the second touch electrode in the touch substrate. In the existing touch structure, the width of the area where the dummy electrode is located is usually 100μm to 300μm. When the tip of the active pen or the fingertip is located in the area where the dummy electrode is located, the sensing signal is weak due to the long distance between the tip of the pen or the fingertip and the first touch electrode and the second touch electrode, resulting in the problem of low touch accuracy.

[0081] In order to solve the problem of low touch accuracy in the existing structure, the exemplary embodiment of the present disclosure provides a touch display panel. In an exemplary embodiment, the touch display panel may include a display substrate and a touch substrate disposed on the display substrate, the display substrate includes a plurality of regularly arranged sub-pixels, the touch substrate includes a plurality of touch electrodes, at least one touch electrode includes a touch-intensive area and a touch-sparse area, the touch-sparse area is located on at least one side of the touch-intensive area close to the adjacent touch electrode, the number of sub-pixels contained in the area surrounded by at least one touch grid in the touch-intensive area is less than the number of sub-pixels contained in the area surrounded by at least one touch grid in the touch-sparse area, and the touch grid is a minimum grid formed by interweaving a plurality of metal wires and having a touch function.

[0082] In an exemplary embodiment, at least one floating dummy line is disposed in an area surrounded by at least one touch grid in the touch-sparse area, and the dummy line is electrically insulated from the touch grid.

[0083] In an exemplary embodiment, the metal lines constituting the touch grid are disposed between adjacent sub-pixels, and the dummy lines are disposed between adjacent sub-pixels.

[0084] In an exemplary embodiment, the dummy lines and the metal lines constituting the touch grid form a dummy grid, or a plurality of dummy lines are interwoven to form a dummy grid, and an area surrounded by the dummy grid includes at least one sub-pixel.

[0085] In an exemplary embodiment, the touch electrode may include a first touch electrode and a second touch electrode, a plurality of the first touch electrodes may be arranged in sequence along a first direction, a plurality of the second touch electrodes may be arranged in sequence along a second direction, adjacent first touch electrodes in the first direction are connected to each other via a first connection portion, adjacent second touch electrodes in the second direction are connected to each other via a second connection portion, and the first direction and the second direction intersect. At least one of the first touch electrode and the second touch electrode may include a touch-intensive area and a touch-sparse area, and the number of sub-pixels contained in an area surrounded by at least one touch grid in the touch-intensive area is less than the number of sub-pixels contained in an area surrounded by at least one touch grid in the touch-sparse area.

[0086] In another exemplary embodiment, the touch electrodes include a third touch electrode and a fourth touch electrode, a plurality of the third touch electrodes and a plurality of the fourth touch electrodes are alternately arranged along a first direction, and a plurality of the third touch electrodes and a plurality of the fourth touch electrodes are sequentially arranged along a second direction; the touch substrate further includes a plurality of first connection lines and a plurality of second connection lines extending along the first direction, the first connection lines and the second connection lines are alternately arranged along the second direction, the third touch electrodes are connected to the first connection lines, and the fourth touch electrodes are connected to the second connection lines. At least one of the third touch electrode, the fourth touch electrode, the first connection line, and the second connection line may include a touch-intensive area and a touch-sparse area, and the number of sub-pixels contained in an area surrounded by at least one touch grid in the touch-intensive area is less than the number of sub-pixels contained in an area surrounded by at least one touch grid in the touch-sparse area.

[0087] In an exemplary embodiment, the display substrate may include any one or more of the following: a liquid crystal display (LCD) substrate, an organic light emitting diode (OLED) display substrate, a light emitting diode (LED) display substrate, an inorganic electroluminescent display (EL) substrate, a field emission display (FED) substrate, a surface-conduction electron-emitter display (SED) substrate, a plasma display panel (PDP), and an electrophoretic display (EPD) substrate.

[0088] In an exemplary embodiment, the display substrate may be an OLED substrate. Organic Light Emitting Diode (OLED for short) is an active light-emitting display device with the advantages of self-luminescence, wide viewing angle, high contrast, low power consumption, and extremely high response speed. With the continuous development of display technology, display substrates with OLED as light-emitting devices and signal control by thin film transistors (TFT for short) have become the mainstream products in the current display field. In an exemplary embodiment, the OLED substrate may include a substrate, a driving circuit layer disposed on the substrate, a light-emitting structure layer disposed on the side of the driving circuit layer away from the substrate, and an encapsulation structure layer disposed on the side of the light-emitting structure layer away from the substrate. The touch substrate may be disposed on the encapsulation structure layer to form a touch structure on a thin film encapsulation (Touch on Thin Film Encapsulation, referred to as Touch on TFE) structure.

[0089] Figure 3 FIG. 1 is a schematic cross-sectional structure diagram of a touch display panel according to an exemplary embodiment of the present disclosure. Figure 3 As shown, on a plane perpendicular to the touch display panel, the touch display panel may include a driving circuit layer 101 arranged on a substrate 1, a light-emitting structure layer 102 arranged on a side of the driving circuit layer 101 away from the substrate, an encapsulation structure layer 103 arranged on a side of the light-emitting structure layer 102 away from the substrate, and a touch substrate 104 arranged on a side of the encapsulation structure layer 103 away from the substrate. The substrate 1, the driving circuit layer 101, the light-emitting structure layer 102 and the encapsulation structure layer 103 constitute the display substrate of the present disclosure.

[0090] In an exemplary embodiment, the substrate 1 may be a flexible substrate, or may be a rigid substrate. The driving circuit layer 102 may include a plurality of transistors and storage capacitors constituting a pixel driving circuit. Figure 3Only a transistor 101A and a storage capacitor 101B in the pixel driving circuit are taken as examples. The light-emitting structure layer 103 may include a pixel definition layer and a light-emitting device. The light-emitting device may include an anode, an organic light-emitting layer and a cathode. The anode is connected to the drain electrode of the driving transistor 101A through a via, the organic light-emitting layer is connected to the anode, and the cathode is connected to the organic light-emitting layer. The organic light-emitting layer emits light of corresponding colors under the drive of the anode and the cathode. The encapsulation structure layer 104 may include a first encapsulation layer, a second encapsulation layer and a third encapsulation layer stacked together. The first encapsulation layer and the third encapsulation layer may be made of inorganic materials, and the second encapsulation layer may be made of organic materials. The second encapsulation layer is arranged between the first encapsulation layer and the third encapsulation layer to ensure that external water vapor cannot enter the light-emitting structure layer 103. The touch substrate 104 may include a first touch insulation layer 71 arranged on the packaging structure layer 103, a first touch metal layer 72 arranged on the first touch insulation layer 71, a second touch insulation layer 73 covering the first touch metal layer 72, a second touch metal layer 74 arranged on the second touch insulation layer 73 and a touch protection layer 75 covering the second touch metal layer 74, the first touch metal layer 72 may include a plurality of connecting bridges, the second touch metal layer 74 may include a plurality of driving electrodes and sensing electrodes, and the driving electrodes or the sensing electrodes may be connected to the bridging electrodes through vias.

[0091] Figure 4 FIG. 1 is a schematic diagram of a planar structure of a display substrate. Figure 4 As shown, on a plane parallel to the display substrate, the display substrate may include a plurality of pixel units P arranged regularly, at least one of the plurality of pixel units P may include a first sub-pixel P1 emitting a first color light, a second sub-pixel P2 emitting a second color light, and a third sub-pixel P3 emitting a third color light, and the first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3 may all include a pixel driving circuit and a light-emitting device. The pixel driving circuits in the three sub-pixels are configured to output corresponding currents, and the light-emitting devices in the three sub-pixels are respectively connected to the pixel driving circuits of the sub-pixels in which they are located, and the light-emitting devices are configured to emit light of corresponding brightness in response to the current output by the pixel driving circuit of the sub-pixel in which they are located.

[0092] In an exemplary embodiment, the first subpixel P1 may be a red subpixel that emits red (R) light, the second subpixel P2 may be a blue subpixel that emits blue (B) light, and the third subpixel P3 may be a green subpixel that emits green (G) light. The three subpixels may be arranged in a herringbone shape, the rectangular first subpixel P1 and the rectangular second subpixel P2 may be located on one side of the pixel unit, the rectangular third subpixel P3 may be located on the other side of the pixel unit, and the area of ​​the third subpixel P3 may be approximately the sum of the areas of the first subpixel P1 and the second subpixel P2.

[0093] In an exemplary embodiment, the shape of the sub-pixels in the pixel unit can be any one or more of a triangle, a square, a rectangle, a rhombus, a pentagon and a hexagon, and the three sub-pixels can be arranged horizontally, vertically or in a triangular pattern, which is not limited in the present disclosure.

[0094] In an exemplary embodiment, a pixel unit may include four sub-pixels, and the four sub-pixels may be arranged in a horizontal parallel arrangement, a vertical parallel arrangement, a square shape, a diamond shape, etc., which is not limited in the present disclosure.

[0095] In an exemplary embodiment, the sub-pixel on the display substrate may include a light-emitting area and a non-light-emitting area, the light-emitting area is the area of ​​the pixel opening in the pixel definition layer, and the non-light-emitting area is the area outside the pixel opening. When the touch electrode in the touch substrate adopts a metal grid form, the shape and position of the grid pattern on the touch substrate are substantially the same as the shape and position of the sub-pixel on the display substrate, that is, the shapes and positions of the plurality of grid patterns correspond one-to-one to the shapes and positions of the plurality of sub-pixels, the area surrounded by the metal lines in one grid pattern includes the light-emitting area of ​​the sub-pixel, and the metal lines are located in the non-light-emitting area between adjacent light-emitting areas.

[0096] Figure 5 is a schematic diagram of a touch-intensive area on a touch display panel of an exemplary embodiment of the present disclosure, Figure 6 Schematic diagram of a touch sparse area on a touch display panel of an exemplary embodiment of the present disclosure, in which dark lines represent metal wires constituting a touch grid, and light lines represent virtual wires that are not connected to the touch grid. In an exemplary embodiment, a touch grid refers to a minimum grid formed by interweaving a plurality of metal wires and having a touch function, the touch grid can electrically form a voltage loop, the metal wires constituting the touch grid are interconnected, and the metal wires are arranged between adjacent sub-pixels. In an exemplary embodiment, the virtual wires are metal wires electrically insulated from the touch grid, that is, the virtual wires are disconnected from the metal wires constituting the touch grid. The virtual wires are arranged between adjacent sub-pixels, and the virtual wires and the metal wires constituting the touch grid can form a virtual grid, or a plurality of virtual wires can be interwoven to form a virtual grid, and the area surrounded by the virtual grid contains at least one sub-pixel. In other words, the virtual grid cannot electrically form a voltage loop.

[0097] In an exemplary embodiment, the touch display panel may include a stacked display substrate and a touch substrate. The display substrate may include a plurality of regularly arranged sub-pixels, and the plurality of sub-pixels may include a first sub-pixel, a second sub-pixel, and a third sub-pixel. The touch substrate may include a metal grid layer, and the metal grid layer may include a plurality of grid patterns formed by interweaving a plurality of metal wires, and the plurality of grid patterns may include a first grid pattern corresponding to the position and shape of the first sub-pixel on the display substrate, a second grid pattern corresponding to the position and shape of the second sub-pixel on the display substrate, and a third grid pattern corresponding to the position and shape of the third sub-pixel on the display substrate, and the metal wires constituting the grid patterns are all located in the non-luminous area of ​​the sub-pixel, and the orthographic projection of the metal wire on the plane of the touch display panel is located within the range of the orthographic projection of the non-luminous area on the plane of the touch display panel, and the orthographic projection of the luminous area on the plane of the touch display panel is located within the range of the orthographic projection of the area enclosed by the metal wire on the plane of the touch display panel. In an exemplary embodiment, the touch-intensive area may include a plurality of first touch grids 31, and the first touch grid 31 may include 1 sub-pixel, such as Figure 5 The touch sparse area may include a plurality of second touch grids 32, and the second touch grid 32 may include three sub-pixels, such as Figure 6 shown.

[0098] Figure 7 FIG. 1 is a schematic plan view of a touch control substrate according to an exemplary embodiment of the present disclosure. Figure 7 As shown, the touch substrate may include a metal mesh layer, and the metal mesh layer may include a plurality of mesh patterns formed by interweaving a plurality of metal lines. In an exemplary embodiment, a plurality of first touch electrodes 10 and a plurality of second touch electrodes 20 may be formed on the metal mesh layer. The plurality of first touch electrodes 10 may be sequentially arranged along a first direction D1, and the first touch electrodes 10 adjacent to each other in the first direction D1 may be connected to each other through a first connecting portion 11. The plurality of second touch electrodes 20 may be sequentially arranged along a second direction D2, and the second touch electrodes 20 adjacent to each other in the second direction D2 may be connected to each other through a second connecting portion 21.

[0099] In an exemplary embodiment, the touch substrate may further include a plurality of first transmission lines, second transmission lines, first pads, and second pads, so that the first touch electrode and the second touch electrode are connected to the driver through the corresponding transmission lines and pads, which is not limited in the present disclosure. The driver may apply a driving signal to one touch electrode and receive an output signal from another touch electrode, thereby forming a stable capacitance between the first touch electrode and the second touch electrode. When a finger or an active pen touches the touch screen, the touch causes the capacitance between the first touch electrode and the second touch electrode to change, thereby determining the touch position and achieving the corresponding touch operation.

[0100] In an exemplary embodiment, on a plane perpendicular to the touch substrate, the touch substrate may include at least a stacked bridge layer, an insulating layer and a metal mesh layer. In an exemplary embodiment, a plurality of first touch electrodes 10, a plurality of second touch electrodes 20 and a plurality of first connecting portions 11 may be arranged in the same layer on the metal mesh layer (which may be referred to as the touch layer), and may be formed simultaneously by the same patterning process, and the first touch electrodes 10 and the first connecting portions 11 may be an integral structure connected to each other. The second connecting portion 21 (which may be referred to as a connecting bridge) may be arranged in the bridge layer, an insulating layer may be arranged between the metal mesh layer and the bridge layer, and the second connecting portion 21 may be connected to the adjacent second touch electrodes 20 through a via. In some possible implementations, a plurality of first touch electrodes 10, a plurality of second touch electrodes 20 and a plurality of second connecting portions 21 may be arranged in the same layer on the metal mesh layer, the second touch electrodes 20 and the second connecting portions 21 may be an integral structure connected to each other, and the first connecting portion 11 may be arranged in the bridge layer, and connected to the adjacent first touch electrodes 10 through a via.

[0101] In an exemplary embodiment, the first touch electrodes 10 may be driving electrodes (Tx), and the second touch electrodes 20 may be sensing electrodes (Rx); or, the first touch electrodes 10 may be sensing electrodes, and the second touch electrodes 20 may be driving electrodes.

[0102] In an exemplary embodiment, the first touch electrode 10 and the second touch electrode 20 may be in a rhombus shape. In some possible implementations, the first touch electrode 10 and the second touch electrode 20 may be in any one or more of a triangle, a square, a rectangle, a trapezoid, a parallelogram, a rhombus, a pentagon, a hexagon, and other polygons, which is not limited in the present disclosure.

[0103] In an exemplary embodiment, at least one first touch electrode 10 may include a first touch-intensive area 110 and a first touch-sparse area 120, and the first touch-sparse area 120 may be located on at least one side of the first touch-intensive area 110 close to the second touch electrode 20. The first touch-intensive area 110 may include a plurality of first touch grids, and the first touch-sparse area 120 may include a plurality of second touch grids, and the number of sub-pixels contained in an area surrounded by at least one first touch grid in the first touch-intensive area 110 may be less than the number of sub-pixels contained in an area surrounded by at least one second touch grid in the first touch-sparse area 120.

[0104] In an exemplary embodiment, at least one second touch electrode 20 may include a second touch-intensive area 210 and a second touch-sparse area 220. The second touch-sparse area 220 may be located on at least one side of the second touch-intensive area 210 close to the first touch electrode 10. The number of sub-pixels contained in the area enclosed by at least one first touch grid in the second touch-intensive area 210 may be smaller than the number of sub-pixels contained in the area enclosed by at least one second touch grid in the second touch-sparse area 220.

[0105] Figure 8 is a schematic diagram of a first touch grid according to an exemplary embodiment of the present disclosure, Fig. 9 FIG. 1 is a schematic diagram of a second touch grid of an exemplary embodiment of the present disclosure, in which dark lines represent metal lines constituting the touch grid, and light lines represent virtual lines not connected to the touch grid. In an exemplary embodiment, for a plurality of first metal lines 41 extending along the first direction D1 and a plurality of second metal lines 42 extending along the second direction D2 that cross each other, by providing cuts on the metal lines, touch grids of different sizes can be formed.

[0106] In an exemplary embodiment, the plurality of first metal wires 41 and the plurality of second metal wires 42 intersect each other to form a plurality of rectangular grid patterns, and the plurality of grid patterns are all first touch grids 31, such as Figure 8 As shown, Figure 8 Can be Figure 7 In the exemplary embodiment, since the position and shape of the grid pattern on the touch substrate correspond to the position and shape of the sub-pixel on the display substrate, the first touch grid 31 including one grid pattern indicates that the first touch grid 31 includes one sub-pixel.

[0107] In an exemplary embodiment, a plurality of first metal lines 41 and a plurality of second metal lines 42 intersect each other, but a cut is provided on the first metal lines 41 and / or the second metal lines 42 to form a second touch grid 32. The cut can be understood as an imaginary line that cuts the metal lines, and the cut isolates the metal lines on both sides of the cut from each other. The area enclosed by the second touch grid 32 includes a plurality of dummy lines 43, and the dummy lines 43 are electrically insulated from the second touch grid 32, such as Fig. 9 As shown, Fig. 9 Can be Figure 7 Magnified view of area C.

[0108] In an exemplary embodiment, the dummy lines 43 and the metal lines constituting the second touch grid 32 may form the dummy grid 50, or a plurality of dummy lines 43 may be interwoven to form the dummy grid 50. Fig. 9As shown, the area surrounded by the second touch grid 32 may include three dummy grids 50. Since the dummy grid is formed by setting cutouts in the grid pattern, the shape and area of ​​the dummy grid are the same as the shape and area of ​​the grid pattern, and the position and shape of the dummy grid correspond one-to-one to the position and shape of the sub-pixel on the display substrate, or the area surrounded by the dummy grid contains at least one sub-pixel, so the second touch grid 32 includes three dummy grids 50, indicating that the second touch grid 32 includes three sub-pixels.

[0109] In an exemplary embodiment, Figure 8 The area enclosed by the first touch grid 31 shown in FIG. 1 includes one sub-pixel. Fig. 9 The area enclosed by the second touch grid 32 shown includes 3 sub-pixels, and the number of sub-pixels included in the area enclosed by the first touch grid 31 is less than the number of sub-pixels included in the area enclosed by the second touch grid 32. Therefore, the area where the first touch grid 31 is located is a touch-intensive area, and the area where the second touch grid 32 is located is a touch-sparse area.

[0110] In an exemplary embodiment, a plurality of first metal lines and a plurality of second metal lines cross each other to form a plurality of regularly arranged grid patterns, and touch grids of different sizes can be formed by setting cutouts or not setting cutouts on the metal lines of the corresponding grid patterns.

[0111] In an exemplary embodiment, a cut is provided on the grid pattern at the junction of the first touch electrode and the second touch electrode, and the cut cuts off the metal wires of the grid pattern, so that each grid pattern is divided into two parts, one part belongs to the first touch electrode, and the other part belongs to the second touch electrode, so that the first touch electrode and the second touch electrode can be isolated from each other.

[0112] In an exemplary embodiment, the touch-intensive area and the touch-sparse area of ​​the present disclosure are related to the number of sub-pixels contained in the area surrounded by the touch grid. The fewer the number of sub-pixels contained in the area surrounded by the touch grid, the denser the area where the touch grid is located. Figure 8 The area enclosed by the first touch grid 31 shown in FIG. 1 includes one sub-pixel. Fig. 9The area surrounded by the second touch grid 32 shown in the figure includes 3 sub-pixels, and the number of sub-pixels included in the first touch grid 31 is less than the number of sub-pixels included in the second touch grid 32. Since the number of sub-pixels included in the area surrounded by the first touch grid 31 is small, and the number of sub-pixels included in the area surrounded by the second touch grid 32 is large, for a set area of ​​the same size, a large number of first touch grids 31 can be set in the set area, and a small number of second touch grids 32 can be set, so the density of the area where the first touch grid 31 is located is greater than the density of the area where the second touch grid 32 is located. In other words, relative to the area where the second touch grid 32 is located, the area where the first touch grid 31 is located is a touch-intensive area, and relative to the area where the first touch grid 31 is located, the area where the second touch grid 32 is located is a touch-sparse area.

[0113] Fig.10 FIG. 1 is a schematic diagram of the structure of a first touch control electrode according to an exemplary embodiment of the present disclosure. Fig.10 As shown, the first touch electrode 10 may include a first touch-intensive area 110 and a first touch-sparse area 120. The first touch-intensive area 110 may be located in the middle area of ​​the first touch electrode 10, the first touch-sparse area 120 may be located in the edge area of ​​the first touch electrode 10, and the first touch-sparse area 120 may be located on at least one side of the first touch-intensive area 110.

[0114] In an exemplary embodiment, the first touch-intensive area 110 may include multiple first touch grids 31, and the first touch-sparse area 120 may include multiple second touch grids 32. The number of sub-pixels contained in the area enclosed by at least one first touch grid 31 in the first touch-intensive area 110 may be smaller than the number of sub-pixels contained in the area enclosed by the second touch grids 32 in the first touch-sparse area 120.

[0115] In an exemplary embodiment, along a direction away from the first touch-intensive area 110 , the first width L1 of the first touch-sparse area 120 may be approximately 50 μm to 200 μm.

[0116] Fig.11 FIG. 1 is a schematic diagram of the structure of a second touch control electrode according to an exemplary embodiment of the present disclosure. Fig.11 As shown, the second touch electrode 20 may include a second touch-intensive area 210 and a second touch-sparse area 220. The second touch-intensive area 210 may be located in the middle area of ​​the second touch electrode 20, the second touch-sparse area 220 may be located in the edge area of ​​the second touch electrode 20, and the second touch-sparse area 220 may be located on at least one side of the second touch-intensive area 210.

[0117] In an exemplary embodiment, the second touch-intensive area 210 may include multiple first touch grids 31, and the second touch-sparse area 220 may include multiple second touch grids 32. The number of sub-pixels contained in the area enclosed by at least one first touch grid 31 in the second touch-intensive area 210 may be smaller than the number of sub-pixels contained in the area enclosed by the second touch grids 32 in the second touch-sparse area 220.

[0118] In an exemplary embodiment, the second width L2 of the second touch sparse area 220 may be about 50 μm to 200 μm.

[0119] In an exemplary embodiment, a ratio of the number of sub-pixels included in the second touch grid 32 to the number of sub-pixels included in the first touch grid 31 may be approximately 2 to 4.

[0120] In an exemplary embodiment, the sum of the first width L1 and the second width L2 may be approximately 100 μm to 300 μm.

[0121] In an exemplary embodiment, the shapes and areas of the plurality of first touch grids 31 in the first touch dense area 110 and the second touch dense area 210 may be the same, or the shapes and areas of the plurality of first touch grids 31 in the first touch dense area 110 and the second touch dense area 210 may be different.

[0122] In an exemplary embodiment, the shapes and areas of the plurality of second touch grids 32 in the first touch sparse area 120 and the second touch sparse area 220 may be the same, or the shapes and areas of the plurality of second touch grids 32 in the first touch sparse area 120 and the second touch sparse area 220 may be different.

[0123] In an exemplary embodiment, at least one dummy area may be provided in the first touch-intensive area 110 and the second touch-intensive area 210 , which is not limited in the present disclosure.

[0124] like Fig.10 and Fig.11The structure of the first touch electrode and the second touch electrode shown is only an example. In actual implementation, the corresponding structure can be changed according to actual needs, and the present disclosure does not limit it here. For example, for an adjacent first touch electrode 10 and a second touch electrode 20, a first touch sparse area 120 is provided at an edge area of ​​the first touch electrode 10 close to the second touch electrode 20, and a second touch sparse area 220 is provided at an edge area of ​​the second touch electrode 20 close to the first touch electrode 10. The first touch sparse area 120 of the first touch electrode 10 is adjacent to the second touch sparse area 220 of the second touch electrode 20, and the first touch sparse area 120 and the second touch sparse area 220 are isolated from each other by setting a plurality of incisions. For another example, for an adjacent first touch electrode 10 and a second touch electrode 20, a first touch sparse area 120 is provided at an edge area of ​​the first touch electrode 10 close to the second touch electrode 20, and a second touch sparse area 220 is not provided at an edge area of ​​the second touch electrode 20 close to the first touch electrode 10. The first touch sparse area 120 of the first touch electrode 10 is adjacent to the second touch dense area 210 of the second touch electrode 20, and the first touch sparse area 120 and the second touch dense area 210 are isolated from each other by setting a plurality of incisions. For another example, for an adjacent first touch electrode 10 and a second touch electrode 20, the first touch sparse area 120 is not set in the edge area of ​​the first touch electrode 10 close to the second touch electrode 20, and the second touch sparse area 220 is set in the edge area of ​​the second touch electrode 20 close to the first touch electrode 10. The first touch dense area 110 of the first touch electrode 10 is adjacent to the second touch sparse area 220 of the second touch electrode 20, and the first touch dense area 110 and the second touch sparse area 220 are isolated from each other by setting a plurality of incisions.

[0125] Fig.12 FIG. 2 is a schematic plan view of another touch control substrate according to an exemplary embodiment of the present disclosure. Fig.12As shown, in an exemplary embodiment, the touch substrate may include a metal mesh layer, and the metal mesh layer includes a plurality of mesh patterns formed by interweaving a plurality of metal wires. In an exemplary embodiment, a plurality of third touch electrodes 30, a plurality of fourth touch electrodes 40, a plurality of first connection lines 61, and a plurality of second connection lines 62 may be formed on the metal mesh layer. The plurality of third touch electrodes 30 and the plurality of fourth touch electrodes 40 may be alternately arranged along the first direction D1, the plurality of third touch electrodes 30 may be sequentially arranged along the second direction D2, and the plurality of fourth touch electrodes 40 may be sequentially arranged along the second direction D2. The first connection lines 61 and the second connection lines 62 may be line-shaped extending along the first direction D1, and the plurality of first connection lines 61 and the plurality of second connection lines 62 may be alternately arranged along the second direction D2. Among the multiple third touch electrodes 30 and the multiple fourth touch electrodes 40 alternately arranged along the first direction D1, the multiple third touch electrodes 30 are connected to the first connecting line 61, the multiple fourth touch electrodes 40 are connected to the second connecting line 62, and some of the fourth touch electrodes 40 adjacent in the second direction D2 can be connected to each other through the third connecting portion 63.

[0126] In an exemplary embodiment, the touch substrate may further include a plurality of third transmission lines, a fourth transmission line, a third pad, and a fourth pad, so that the third touch electrode and the fourth touch electrode are connected to the driver through the corresponding transmission lines and pads, which is not limited in the present disclosure. The driver may apply a driving signal to one touch electrode and receive an output signal from another touch electrode, thereby forming a stable capacitance between the third touch electrode and the fourth touch electrode. When a finger or an active pen touches the touch screen, the touch causes the capacitance between the third touch electrode and the fourth touch electrode to change, thereby determining the touch position and achieving the corresponding touch operation.

[0127] In an exemplary embodiment, on a plane perpendicular to the touch substrate, the touch substrate may include a stacked bridge layer, an insulating layer, and a metal mesh layer. In an exemplary embodiment, a plurality of third touch electrodes 30, a plurality of fourth touch electrodes 40, a plurality of first connection lines 61, and a plurality of second connection lines 62 may be disposed in the same layer on the metal mesh layer, and may be formed by the same patterning process, the third touch electrodes 30 and the first connection lines 61 may be an integral structure connected to each other, and the fourth touch electrodes 40 and the second connection lines 62 may be an integral structure connected to each other. The third connection portion 63 (which may be referred to as a connection bridge) may be disposed in the bridge layer, an insulating layer may be disposed between the metal mesh layer and the bridge layer, and the third connection portion 63 is connected to the adjacent fourth touch electrode 40 through a via.

[0128] In an exemplary embodiment, the third touch electrode 30 may be a driving electrode (Tx), and the fourth touch electrode 40 may be a sensing electrode (Rx); or, the third touch electrode 30 may be a sensing electrode, and the fourth touch electrode 40 may be a driving electrode.

[0129] In an exemplary embodiment, the third touch electrode 30 and the fourth touch electrode 40 may be rectangular. In some possible implementations, the third touch electrode 30 and the fourth touch electrode 40 may be any one or more of a triangle, a square, a rectangle, a trapezoid, a parallelogram, a rhombus, a pentagon, a hexagon and other polygons, which are not limited in the present disclosure.

[0130] Fig.13 FIG. 1 is a schematic diagram of the structure of a third touch control electrode according to an exemplary embodiment of the present disclosure. Fig.12 and Fig.13 As shown, at least one third touch electrode 30 may include a third touch-intensive area 130 and a third touch-sparse area 140. The third touch-intensive area 130 may be located in the middle area of ​​the third touch electrode 30, the third touch-sparse area 140 may be located in the edge area of ​​the third touch electrode 30, and the third touch-sparse area 140 may be located on at least one side of the third touch-intensive area 130.

[0131] In an exemplary embodiment, the third touch-intensive area 130 may include multiple third touch grids 33, and the third touch-sparse area 140 may include multiple fourth touch grids 34. The number of sub-pixels contained in the area enclosed by at least one third touch grid 33 in the third touch-intensive area 130 may be smaller than the number of sub-pixels contained in the area enclosed by the fourth touch grids 34 in the third touch-sparse area 140.

[0132] In an exemplary embodiment, along a direction away from the third touch-intensive area 130 , the third width L3 of the third touch-sparse area 140 may be approximately 50 μm to 200 μm.

[0133] In an exemplary embodiment, the position of the third touch sparse area 140 of the third touch electrode 30 may include any one or more of the following: it may be located on at least one side of the third touch dense area 130 close to the fourth touch electrode 40, it may be located on at least one side of the third touch dense area 130 close to the first connection line 61, and it may be located on at least one side of the third touch dense area 130 close to the second connection line 62.

[0134] In an exemplary embodiment, at least one first connection line 61 may include a fifth touch-intensive area 150 and a fifth touch-sparse area 160. The fifth touch-intensive area 150 may be located in the middle area of ​​the first connection line 61 in the second direction D2, and the fifth touch-sparse area 160 may be located in the edge area of ​​the first connection line 61 in the second direction D2, that is, the fifth touch-sparse area 160 may be located on one side or both sides of the fifth touch-intensive area 150 in the second direction D2.

[0135] In an exemplary embodiment, the fifth touch-intensive area 150 may include multiple fifth touch grids 35, and the fifth touch-sparse area 160 may include multiple sixth touch grids 36. The number of sub-pixels contained in the area enclosed by at least one fifth touch grid 35 in the fifth touch-intensive area 150 may be smaller than the number of sub-pixels contained in the area enclosed by the sixth touch grids 36 in the fifth touch-sparse area 160.

[0136] In an exemplary embodiment, the position of the fifth touch sparse area 160 of the first connecting line 61 may include any one or more of the following: it may be located on at least one side of the fifth touch dense area 150 close to the third touch electrode 30 , and it may be located on at least one side of the fifth touch dense area 150 close to the fourth touch electrode 40 .

[0137] In an exemplary embodiment, along a direction away from the fifth touch-intensive area 150 , the fifth width L5 of the fifth touch-sparse area 160 may be approximately 50 μm to 200 μm.

[0138] Fig.14 FIG. 1 is a schematic diagram of the structure of a fourth touch control electrode according to an exemplary embodiment of the present disclosure. Fig.12 and Fig.14 As shown, at least one fourth touch electrode 40 may include a fourth touch-intensive area 230 and a fourth touch-sparse area 240. The fourth touch-intensive area 230 may be located in the middle area of ​​the fourth touch electrode 40, the fourth touch-sparse area 240 may be located in the edge area of ​​the fourth touch electrode 40, and the fourth touch-sparse area 240 may be located on at least one side of the fourth touch-intensive area 230.

[0139] In an exemplary embodiment, the fourth touch-intensive area 230 may include multiple third touch grids 33, and the fourth touch-sparse area 240 may include multiple fourth touch grids 34. The number of sub-pixels contained in the area enclosed by at least one third touch grid 33 in the fourth touch-intensive area 230 may be smaller than the number of sub-pixels contained in the area enclosed by the fourth touch grids 34 in the fourth touch-sparse area 240.

[0140] In an exemplary embodiment, along a direction away from the fourth touch-intensive area 230 , the fourth width L4 of the fourth touch-sparse area 240 may be approximately 50 μm to 200 μm.

[0141] In an exemplary embodiment, the position of the fourth touch sparse area 240 of the fourth touch electrode 40 may include any one or more of the following: it may be located on at least one side of the fourth touch dense area 230 close to the third touch electrode 30, it may be located on at least one side of the fourth touch dense area 230 close to the first connection line 61, and it may be located on at least one side of the fourth touch dense area 230 close to the second connection line 62.

[0142] In an exemplary embodiment, at least one second connection line 62 may include a sixth touch-intensive area 250 and a sixth touch-sparse area 260. The sixth touch-intensive area 250 may be located in the middle area of ​​the second direction D2 of the second connection line 62, and the sixth touch-sparse area 260 may be located in the edge area of ​​the second direction D2 of the second connection line 62, that is, the sixth touch-sparse area 260 may be located on one side or both sides of the sixth touch-intensive area 250 in the second direction D2.

[0143] In an exemplary embodiment, the sixth touch-intensive area 250 may include multiple fifth touch grids 35, and the sixth touch-sparse area 260 may include multiple sixth touch grids 36. The number of sub-pixels contained in the area enclosed by at least one fifth touch grid 35 in the sixth touch-intensive area 250 may be smaller than the number of sub-pixels contained in the area enclosed by the sixth touch grids 36 in the sixth touch-sparse area 260.

[0144] In an exemplary embodiment, the position of the sixth touch sparse area 260 of the second connecting line 62 may include any one or more of the following: it may be located on at least one side of the sixth touch dense area 250 close to the third touch electrode 30 , and it may be located on at least one side of the sixth touch dense area 250 close to the fourth touch electrode 40 .

[0145] In an exemplary embodiment, along a direction away from the sixth touch-intensive area 250 , the sixth width L6 of the sixth touch-sparse area 260 may be approximately 50 μm to 200 μm.

[0146] In an exemplary embodiment, a ratio of the number of sub-pixels included in the fourth touch grid 34 to the number of sub-pixels included in the third touch grid 33 may be approximately 2 to 4.

[0147] In an exemplary embodiment, a ratio of the number of sub-pixels included in the sixth touch grid 36 to the number of sub-pixels included in the fifth touch grid 35 may be approximately 2 to 4.

[0148] In an exemplary embodiment, the sum of the third width L3 and the fourth width L4 may be approximately 100 μm to 300 μm.

[0149] In an exemplary embodiment, the third touch grid 33 and the fifth touch grid 35 may have substantially the same shape and area, and the fourth touch grid 34 and the sixth touch grid 36 may have substantially the same shape and area.

[0150] In an exemplary embodiment, the shapes and areas of the plurality of third touch grids 33 in the third touch dense area 130 and the fourth touch dense area 230 may be the same, or may be different. The shapes and areas of the plurality of fourth touch grids 34 in the third touch sparse area 140 and the fourth touch sparse area 240 may be the same, or may be different.

[0151] In an exemplary embodiment, at least one dummy area may be provided in the third touch-intensive area 130 and the fourth touch-intensive area 230 , which is not limited in the present disclosure.

[0152] In an exemplary embodiment, the shapes and areas of the plurality of fifth touch grids 35 in the fifth touch dense area 150 and the sixth touch dense area 250 may be the same, or may be different. The shapes and areas of the plurality of sixth touch grids 36 in the fifth touch sparse area 160 and the sixth touch sparse area 260 may be the same, or may be different.

[0153] In an exemplary embodiment, Fig.13 and Fig.14 The structure of the third touch electrode, the fourth touch electrode, the first connecting line and the second connecting line shown is only an example. In actual implementation, the corresponding structure can be changed according to actual needs. The touch sparse areas of the two touch electrodes can be adjacent to the touch sparse areas, or the touch dense areas of the two touch electrodes can be adjacent to the touch sparse areas, or the touch dense areas of the two touch electrodes can be adjacent to the touch dense areas. The present disclosure does not limit this herein.

[0154] It can be seen from the structure of the aforementioned touch display panel that the exemplary embodiment of the present disclosure sets a touch-intensive area and a touch-sparse area in the touch electrode, and the touch-sparse area is located in the edge area close to the adjacent touch electrode. The number of sub-pixels contained in the area surrounded by the touch grid in the touch-intensive area is less than the number of sub-pixels contained in the area surrounded by the touch grid in the touch-sparse area. This can not only ensure touch accuracy, but also improve touch sensitivity, reporting rate and signal-to-noise ratio. Compared with the existing structure of setting a dummy electrode between two touch electrodes, the present disclosure sets a touch-sparse area with touch function between two touch electrodes. When the tip of the active pen or the fingertip is located in the touch-sparse area, the tip of the pen or the fingertip is close to the touch electrode, and the sensing signal is strong, so it has higher touch accuracy and linearity, which effectively solves the problem of low touch accuracy of the existing structure. By setting a touch sparse area in the touch electrode, the basic mutual capacitance (Cm) formed between the driving electrode and the sensing electrode is reduced overall, and the change in mutual capacitance (ΔCm) caused by touch and no touch is increased overall, thereby improving the touch sensitivity (ΔCm / Cm), and further improving the touch accuracy and linearity. By setting a touch sparse area in the touch electrode, the parasitic capacitance between the touch electrode and the cathode in the light-emitting device is effectively reduced, the delay (RC) time is reduced, the reporting rate and signal-to-noise ratio are increased, and the touch performance is improved.

[0155] An exemplary embodiment of the present disclosure further provides a display device, which may include the aforementioned touch display panel.

[0156] In an exemplary embodiment, the display device may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, or the like.

[0157] Those skilled in the art should understand that the technical solutions of the present disclosure may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present disclosure, and all should be included in the scope of the claims of this application.

Claims

1. A touch display panel, characterized in that: The invention comprises a display substrate and a touch substrate arranged on the display substrate, wherein the display substrate comprises a plurality of regularly arranged sub-pixels, the touch substrate comprises a plurality of touch electrodes, at least one touch electrode comprises a touch-intensive area and a touch-sparse area, the touch-sparse area is located on at least one side of the touch-intensive area close to an adjacent touch electrode, the number of sub-pixels contained in an area surrounded by at least one touch grid in the touch-intensive area is less than the number of sub-pixels contained in an area surrounded by at least one touch grid in the touch-sparse area, and the touch grid is a minimum grid formed by interweaving a plurality of metal wires and having a touch function.

2. The touch display panel according to claim 1, characterized in that: At least one floating dummy line is arranged in an area surrounded by at least one touch grid in the touch sparse area, and the dummy line is electrically insulated from the touch grid.

3. The touch display panel according to claim 2, characterized in that: The metal lines constituting the touch grid are arranged between adjacent sub-pixels, and the dummy lines are arranged between adjacent sub-pixels.

4. The touch display panel according to claim 3, characterized in that: The dummy lines and the metal lines constituting the touch grid form a dummy grid, or a plurality of dummy lines are interwoven to form a dummy grid, and the area surrounded by the dummy grid includes at least one sub-pixel.

5. The touch display panel according to any one of claims 1 to 4, characterized in that: The touch electrodes include first touch electrodes and second touch electrodes, a plurality of the first touch electrodes are arranged in sequence along a first direction, a plurality of the second touch electrodes are arranged in sequence along a second direction, adjacent first touch electrodes in the first direction are connected to each other through a first connecting portion, adjacent second touch electrodes in the second direction are connected to each other through a second connecting portion, and the first direction and the second direction intersect.

6. The touch display panel according to claim 5, characterized in that: At least one first touch electrode includes a first touch-dense area and a first touch-sparse area, and the first touch-sparse area is located on at least one side of the first touch-dense area close to the second touch electrode; the first touch-dense area includes a plurality of first touch grids, the first touch-sparse area includes a plurality of second touch grids, and the number of sub-pixels contained in at least one first touch grid is less than the number of sub-pixels contained in the second touch grid.

7. The touch display panel according to claim 6, characterized in that: Along a direction away from the first touch-intensive area, a width of the first touch-sparse area is 50 μm to 200 μm.

8. The touch display panel according to claim 5, characterized in that: At least one second touch electrode includes a second touch-dense area and a second touch-sparse area, and the second touch-sparse area is located on at least one side of the second touch-dense area close to the first touch electrode; the second touch-dense area includes a plurality of first touch grids, and the second touch-sparse area includes a plurality of second touch grids, and at least one first touch grid contains a greater number of sub-pixels than the second touch grid.

9. The touch display panel according to claim 8, characterized in that: Along a direction away from the second touch-intensive area, a width of the second touch-sparse area is 50 μm to 200 μm.

10. The touch display panel according to claim 6 or 8, characterized in that: The ratio of the number of the sub-pixels included in the second touch grid to the number of the sub-pixels included in the first touch grid is 2 to 4.

11. The touch display panel according to any one of claims 1 to 4, characterized in that: The touch electrodes include third touch electrodes and fourth touch electrodes, and the plurality of third touch electrodes and the plurality of fourth touch electrodes are alternately arranged along a first direction, and the plurality of third touch electrodes and the plurality of fourth touch electrodes are sequentially arranged along a second direction, and the first direction intersects the second direction; the touch substrate also includes a plurality of first connecting lines and a plurality of second connecting lines extending along the first direction, and the first connecting lines and the second connecting lines are alternately arranged along the second direction, the third touch electrodes are connected to the first connecting lines, and the fourth touch electrodes are connected to the second connecting lines.

12. The touch display panel according to claim 11, characterized in that: At least one third touch electrode includes a third touch-dense area and a third touch-sparse area, and the position of the third touch-sparse area includes any one or more of the following: located on at least one side of the third touch-dense area close to the fourth touch electrode, located on at least one side of the third touch-dense area close to the first connecting line, and located on at least one side of the third touch-dense area close to the second connecting line; the third touch-dense area includes multiple third touch grids, the third touch-sparse area includes multiple fourth touch grids, and the number of sub-pixels contained in at least one third touch grid is less than the number of sub-pixels contained in the fourth touch grid.

13. The touch display panel according to claim 12, characterized in that: Along the direction away from the third touch-intensive area, the width of the third touch-sparse area is 50 μm to 200 μm.

14. The touch display panel according to claim 11, characterized in that: At least one fourth touch electrode includes a fourth touch-dense area and a fourth touch-sparse area, and the position of the fourth touch-sparse area includes any one or more of the following: located on at least one side of the fourth touch-dense area close to the third touch electrode, located on at least one side of the fourth touch-dense area close to the first connection line, and located on at least one side of the fourth touch-dense area close to the second connection line; the fourth touch-dense area includes a plurality of third touch grids, the fourth touch-sparse area includes a plurality of fourth touch grids, and at least one third touch grid contains a smaller number of sub-pixels than the fourth touch grid.

15. The touch display panel according to claim 14, characterized in that: Along the direction away from the fourth touch-intensive area, the width of the fourth touch-sparse area is 50 μm to 200 μm.

16. The touch display panel according to claim 12 or 14, characterized in that: The ratio of the number of sub-pixels included in the fourth touch grid to the number of sub-pixels included in the third touch grid is 2 to 4.

17. The touch display panel according to claim 11, characterized in that: At least one first connection line includes a fifth touch-intensive area and a fifth touch-sparse area, and the position of the fifth touch-sparse area includes any one or more of the following: located on at least one side of the fifth touch-intensive area close to the third touch electrode, and located on at least one side of the fifth touch-intensive area close to the fourth touch electrode; the fifth touch-intensive area includes a plurality of fifth touch grids, the fifth touch-sparse area includes a plurality of sixth touch grids, and at least one fifth touch grid contains a smaller number of sub-pixels than the sixth touch grid.

18. The touch display panel according to claim 17, characterized in that: Along the direction away from the fifth touch-intensive area, the width of the fifth touch-sparse area is 50 μm to 200 μm.

19. The touch display panel according to claim 11, characterized in that: At least one second connection line includes a sixth touch-dense area and a sixth touch-sparse area, and the position of the sixth touch-sparse area may include any one or more of the following: located on at least one side of the sixth touch-dense area close to the third touch electrode, and located on at least one side of the sixth touch-dense area close to the fourth touch electrode; the sixth touch-dense area includes a plurality of fifth touch grids, the sixth touch-sparse area includes a plurality of sixth touch grids, and at least one fifth touch grid contains a smaller number of sub-pixels than the sixth touch grid.

20. The touch display panel according to claim 19, characterized in that: Along the direction away from the sixth touch-intensive area, the width of the sixth touch-sparse area is 50 μm to 200 μm.

21. The touch display panel according to claim 17 or 19, characterized in that: The ratio of the number of sub-pixels included in the sixth touch grid to the number of sub-pixels included in the fifth touch grid is 2 to 4.

22. A display device, characterized in that: Comprising the touch display panel as described in any one of claims 1 to 21.

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