CN114356152A

CN114356152A - Touch display panel and display device

Info

Publication number: CN114356152A
Application number: CN202111652662.3A
Authority: CN
Inventors: 项大林
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-04-15

Abstract

The disclosure provides a touch display panel and a display device. The touch display panel comprises a display substrate and a touch substrate, wherein the display substrate comprises a plurality of sub-pixels which are regularly arranged, the touch substrate comprises a plurality of touch electrodes, at least one touch electrode comprises a touch dense area and a touch sparse area, the touch sparse area is positioned at least one side of the touch dense area close to the adjacent touch electrode, and the number of the sub-pixels contained in an area surrounded by at least one touch grid in the touch dense area is smaller than the number of the sub-pixels contained in an area surrounded by at least one touch grid in the touch sparse area. According to the touch control electrode, the touch control dense area and the touch control sparse area are arranged in the touch control electrode, the number of sub-pixels contained in the touch control grid in the touch control dense area is smaller than the number of sub-pixels contained in the touch control grid in the touch control sparse area, so that not only can the touch control precision be ensured, but also the touch control sensitivity can be improved, and the point reporting rate and the signal to noise ratio can be improved.

Description

Touch display panel and display device

Technical Field

The present disclosure relates to but not limited to the field of display technologies, and in particular, to a touch display panel and a display device.

Background

With the rapid development of display technologies, touch technologies have been applied to various electronic devices. According to the working principle, the touch screen of the electronic device can be divided into: capacitive, resistive, infrared, surface acoustic wave, electromagnetic, vibration wave, and optical, among others. The capacitive touch substrate has the advantages of high sensitivity, long service life, high light transmittance and the like, and is widely applied to various display panels.

Based on the considerations of reducing resistance, improving sensitivity and the like, the touch electrode in the capacitive touch substrate is in a Metal Mesh (Metal Mesh) form. Compared with the touch electrode formed by adopting a transparent conductive material, the metal grid has the advantages of small resistance, small thickness, high reaction speed and the like. However, the inventor of the present application finds that the existing touch display panel adopting the metal mesh form has a problem of low touch precision.

Disclosure of Invention

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.

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

In one aspect, the disclosure provides a touch display panel, which includes a display substrate and a touch substrate disposed on the display substrate, where the display substrate includes a plurality of sub-pixels regularly arranged, the touch substrate includes a plurality of touch electrodes, at least one touch electrode includes a dense touch area and a sparse touch area, the sparse touch area is located on at least one side of the dense touch area close to an adjacent touch electrode, the number of sub-pixels included in an area surrounded by at least one touch grid in the dense touch area is smaller than the number of sub-pixels included in an area surrounded by at least one touch grid in the sparse touch area, and the touch grid is a minimum grid formed by interweaving a plurality of metal wires and having a touch function.

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.

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.

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.

In an exemplary embodiment, the touch electrodes include first touch electrodes and second touch electrodes, the first touch electrodes are sequentially disposed along a first direction, the second touch electrodes are sequentially disposed along a second direction, the first touch electrodes adjacent to each other in the first direction are connected to each other by a first connection portion, the second touch electrodes adjacent to each other in the second direction are connected to each other by a second connection portion, and the first direction and the second direction intersect each other.

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

In an exemplary embodiment, the width of the first touch sparse region is 50 μm to 200 μm in a direction away from the first touch dense region.

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

In an exemplary embodiment, the width of the second touch sparse region is 50 μm to 200 μm along a direction away from the second touch dense region.

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.

In an exemplary embodiment, the touch electrodes include third touch electrodes and fourth touch electrodes, the third touch electrodes and the fourth touch electrodes are alternately arranged along a first direction, the third touch electrodes and the fourth touch electrodes are sequentially arranged along a second direction, and the first direction and the second direction are crossed; the touch substrate further comprises a plurality of first connecting lines and a plurality of second connecting lines extending along the first direction, the first connecting lines and the second connecting lines are alternately arranged along the second direction, the third touch electrodes are connected with the first connecting lines, and the fourth touch electrodes are connected with the second connecting lines.

In an exemplary embodiment, the at least one third touch electrode includes a third touch-dense region and a third touch-sparse region, and the position of the third touch-sparse region includes any one or more of: the third touch-control dense area is positioned at least one side close to the fourth touch-control electrode, at least one side close to the first connecting line and at least one side close to the second connecting line; the third touch-dense area comprises a plurality of third touch grids, the third touch-sparse area comprises a plurality of fourth touch grids, and at least one third touch grid comprises a smaller number of sub-pixels than the fourth touch grid comprises.

In an exemplary embodiment, the width of the third touch sparse region is 50 μm to 200 μm in a direction away from the third touch dense region.

In an exemplary embodiment, the 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: the fourth touch dense area is positioned at least one side close to the third touch electrode, at least one side close to the first connecting line and at least one side close to the second connecting line; the fourth touch dense area comprises a plurality of third touch grids, the fourth touch sparse area comprises a plurality of fourth touch grids, and the number of the sub-pixels contained in at least one third touch grid is smaller than the number of the sub-pixels contained in the fourth touch grid.

In an exemplary embodiment, the width of the fourth touch sparse area is 50 μm to 200 μm in a direction away from the fourth touch dense area.

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.

In an exemplary embodiment, the at least one first connection line includes a fifth touch-dense area and a fifth touch-sparse area, and the position of the fifth touch-sparse area includes any one or more of the following: the second touch-control dense area is positioned at least one side close to the third touch-control electrode and at least one side close to the fourth touch-control electrode; the fifth touch dense area comprises a plurality of fifth touch grids, the fifth touch sparse area comprises a plurality of sixth touch grids, and the number of the sub-pixels contained in at least one fifth touch grid is smaller than the number of the sub-pixels contained in the sixth touch grids.

In an exemplary embodiment, the width of the fifth touch sparse region is 50 μm to 200 μm in a direction away from the fifth touch dense region.

In an exemplary embodiment, the 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: the sixth touch dense area is positioned at least one side close to the third touch electrode, and the sixth touch dense area is positioned at least one side close to the fourth touch electrode; the sixth touch dense area comprises a plurality of fifth touch grids, the sixth touch sparse area comprises a plurality of sixth touch grids, and the number of sub-pixels contained in at least one fifth touch grid is smaller than the number of sub-pixels contained in the sixth touch grid.

In an exemplary embodiment, the width of the sixth touch sparse region is 50 μm to 200 μm in a direction away from the sixth touch dense region.

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

On the other hand, the disclosure also provides a display device comprising the touch display panel.

The touch control electrode is provided with a touch control dense area and a touch control sparse area, the touch control sparse area is located in an edge area close to an adjacent touch control electrode, the number of sub-pixels contained in an area surrounded by touch control grids in the touch control dense area is smaller than the number of sub-pixels contained in an area surrounded by touch control grids in the touch control sparse area, touch control precision can be guaranteed, touch control sensitivity can be improved, and a point reporting rate and a signal to noise ratio are improved.

Other aspects will become apparent upon reading the attached drawings and the detailed description.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosed embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the example serve to explain the principles of the disclosure and not to limit the disclosure. The shapes and sizes of the various elements in the drawings are not to be considered as true proportions, but are merely intended to illustrate the present disclosure.

Fig. 1 is a schematic structural diagram of a touch substrate;

fig. 2 is a schematic structural view of a metal mesh-type touch substrate;

fig. 3 is a schematic cross-sectional structure diagram of a touch display panel according to an exemplary embodiment of the disclosure;

FIG. 4 is a schematic plan view of a display substrate panel;

FIG. 5 is a diagram illustrating a touch-dense area on a touch display panel according to an exemplary embodiment of the disclosure;

FIG. 6 is a schematic diagram of a touch sparse area on a touch display panel according to an exemplary embodiment of the present disclosure;

fig. 7 is a schematic plan view of a touch substrate according to an exemplary embodiment of the disclosure;

FIG. 8 is a diagram of a first touch grid according to an exemplary embodiment of the present disclosure;

FIG. 9 is a diagram of a second touch grid according to an exemplary embodiment of the present disclosure;

fig. 10 is a schematic structural diagram of a first touch electrode according to an exemplary embodiment of the disclosure;

fig. 11 is a schematic structural diagram of a second touch electrode according to an exemplary embodiment of the disclosure;

fig. 12 is a schematic plan view of another touch substrate according to an exemplary embodiment of the disclosure;

fig. 13 is a schematic structural diagram of a third touch electrode according to an exemplary embodiment of the disclosure;

fig. 14 is a schematic structural diagram of a fourth touch electrode according to an exemplary embodiment of the disclosure.

Description of reference numerals:

1-a substrate; 10 — a first touch electrode; 11 — a first connection;

20-a second touch electrode; 21-a second connection portion; 30-a third touch electrode;

31 — a first touch grid; 32-a second touch grid; 33-a third touch grid;

34-a fourth touch grid; 35-a fifth touch grid; 36-a sixth touch grid;

40-a fourth touch electrode; 41-a first metal wire; 42-a second metal wire;

43 — dummy line; 50-a dummy grid; 61 — a first connection line;

62-a second connecting line; 63 — a third connecting portion; 70-a dummy electrode;

71-a first touch insulating layer; 72-a first touch metal layer; 73-a second touch insulating layer;

74-a second touch metal layer; 75-a touch protection layer; 101-a first touch unit;

102 — a first transmission line; 103-first pad; 110 — a first touch dense area;

120-a first touch sparse area; 130-a third touch dense area; 140-a third touch sparse area;

150-a fifth touch dense area; 160-a fifth touch sparse area; 201-a second touch unit;

202-a second transmission line; 203 — second bonding pad; 210 — a second touch dense area;

220-second touch sparse area; 230-fourth touch dense area; 240-fourth touch sparse area;

250-a sixth touch dense area; 260-sixth touch sparse area.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Note that the embodiments may be implemented in a plurality of different forms. Those skilled in the art can readily appreciate the fact that the forms and details may be varied into a variety of forms without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure should not be construed as being limited to the contents described in the following embodiments. The embodiments and features of the embodiments in the present disclosure may be arbitrarily combined with each other without conflict.

The drawing scale in this disclosure may be referenced in the actual process, but is not limited thereto. For example: the width-length ratio of the channel, the thickness and the interval of each film layer, the width and the interval of each signal line and each 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, the number of metal grids in each touch electrode, and the like are not limited to the numbers shown in the drawings, and the drawings described in the present disclosure are merely schematic structural diagrams, and one embodiment of the present disclosure is not limited to the shapes, numerical values, and the like shown in the drawings.

The ordinal numbers such as "first", "second", "third", and the like in the present specification are provided for avoiding confusion among the constituent elements, and are not limited in number.

In this specification, for convenience, words such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating orientations or positional relationships are used to explain positional relationships of constituent elements with reference to the drawings, only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present disclosure. The positional relationship of the components is changed as appropriate in accordance with the direction in which each component is described. Therefore, the words described in the specification are not limited to the words described in the specification, and may be replaced as appropriate.

In this specification, the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise specifically indicated and limited. For example, it may be a fixed connection, or a detachable connection, or an integral connection; can be a mechanical connection, or an electrical connection; either directly or indirectly through intervening components, or through the communication between the two elements. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.

In this specification, a transistor refers to an element including at least three terminals, i.e., 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, a channel region refers to a region where current mainly flows.

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 of opposite polarities, or in the case of changing the direction of current flow during circuit operation, the functions of the "source electrode" and the "drain electrode" may be interchanged. Therefore, in this specification, "source electrode" and "drain electrode" may be exchanged with each other.

In this specification, "electrically connected" includes a case where constituent elements are connected together by an element having some kind of electrical action. The "element having a certain electric function" is not particularly limited as long as it can transmit and receive an electric signal between connected components. Examples of the "element having some kind of electric function" include not only an electrode and a wiring but also a switching element such as a transistor, a resistor, an inductor, a capacitor, other elements having various functions, and the like.

In the present specification, "parallel" means a state in which an angle formed by two straight lines is-10 ° or more and 10 ° or less, and therefore, includes a state in which the angle is-5 ° or more and 5 ° or less. The term "perpendicular" refers to a state in which the angle formed by two straight lines is 80 ° or more and 100 ° or less, and therefore includes a state in which the angle is 85 ° or more and 95 ° or less.

In the present specification, "film" and "layer" may be interchanged with each other. For example, the "conductive layer" may be sometimes replaced with a "conductive film". Similarly, the "insulating film" may be replaced with an "insulating layer".

In this specification, a triangle, a rectangle, a trapezoid, a pentagon, a hexagon, or the like is not strictly defined, and may be an approximate triangle, a rectangle, a trapezoid, a pentagon, a hexagon, or the like, and some small deformations due to tolerances may exist, and a lead angle, a curved edge, deformation, or the like may exist.

"about" in this disclosure means that the limits are not strictly defined, and that the numerical values are within the tolerances allowed for the process and measurement.

The capacitive touch substrate can be divided into a Mutual Capacitance (Mutual Capacitance) structure and a Self Capacitance (Self Capacitance) structure, the Mutual Capacitance structure is formed by a driving electrode (Tx) and an induction electrode (Rx), position detection is performed by using change of the Mutual Capacitance, the Self Capacitance structure is formed by a touch electrode and a human body, and position detection is performed by using change of the Self Capacitance. The self-capacitance touch substrate is of a single conductive layer structure and has the characteristics of low power consumption, simple structure and the like, and the mutual capacitance touch substrate is of a multi-conductive layer structure and has the characteristics of multi-point touch and the like.

Fig. 1 is a schematic structural diagram of a touch substrate. As shown in fig. 1, 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 a second direction D2, the plurality of second touch units 201 are sequentially arranged along a first direction D1, and the first direction D1 crosses the second direction D2.

In an exemplary embodiment, the first touch unit 101 may include a plurality of first touch electrodes 10 and a plurality of first connection parts 11 sequentially arranged in the first direction D1, the plurality of first touch electrodes 10 and the plurality of first connection parts 11 being alternately arranged and sequentially connected. The second touch unit 201 may include a plurality of second touch electrodes 20 sequentially arranged in the second direction D2, the plurality of second touch electrodes 20 being arranged at intervals, and the second touch electrodes 20 adjacent in the second direction D2 being connected to each other by second connection parts 21. The film layer where the second connection portion 21 is located is different from the film layer where the first touch electrode 10 and the second touch electrode 20 are located. The first and

second touch electrodes

10 and 20 are alternately arranged in a third direction D3, and the third direction D3 crosses the first and second directions D1 and D2.

In an exemplary embodiment, each first touch unit 101 may be connected to the first pad 103 through the first transmission line 102, and each second touch unit 201 may be connected to the second pad 203 through the second transmission line 202. In an exemplary embodiment, the first touch electrode 10 may be connected to a driver (not shown) through the first pad 103, the second touch electrode 20 may be connected to the driver through 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 may cause a capacitance change between the first touch electrode 10 and the second touch electrode 20, so as to determine a touch position and implement 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.

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, and the disclosure is not limited herein. For example, the first touch electrode 10 and the second touch electrode 20 may have a rhombus shape.

In an exemplary embodiment, the first and

second touch electrodes

10 and 20 may be in the form of a Metal Mesh (Metal Mesh), the Metal Mesh may include a plurality of Mesh patterns formed by interweaving a plurality of Metal lines, and a line width of the Metal lines may be less than or equal to 5 μm. In an exemplary embodiment, the shape of the mesh pattern surrounded by the metal wires may include any one or more of a triangle, a square, a rectangle, a rhombus, a trapezoid, a pentagon, and a hexagon. In some possible implementations, the grid pattern formed by the metal wires may be a regular shape or an irregular shape, and the edges of the grid pattern may be straight lines or may be curved lines, which is not limited in this disclosure. The touch electrode is in a metal grid form and has the advantages of small resistance, thin thickness, high reaction speed, light weight, thinness, foldability and the like.

Fig. 2 is a schematic structural diagram of a metal mesh-type touch substrate, which is an enlarged area of an area a in fig. 1. In an exemplary embodiment, the touch substrate may include a plurality of touch electrodes, which are electrodes to which a voltage may be electrically applied, and metal lines constituting the touch electrodes are connected to the transmission line, and a Dummy (Dummy) electrode, which is an electrode to which a voltage may not be electrically applied, and the metal lines constituting the Dummy electrode are disconnected from the transmission line. The metal mesh shown in fig. 2 may form 2 first touch electrodes 10, 2 second touch electrodes 20, and a dummy electrode 70, the dummy electrode 70 may be "X" shaped to isolate the first touch electrodes 10 from the second touch electrodes 20, two first touch electrodes 10 may be respectively located at both sides of the dummy electrode 70 in a first direction D1 and connected to each other by first connection portions 11, and two second touch electrodes 20 may be respectively located at both sides of the dummy electrode 70 in a second direction D2 and connected to each other by second connection portions 21.

The inventor of the present application finds that the existing touch display panel in the metal grid form has a problem of low touch precision, which is caused by the fact that a dummy electrode is arranged between a first touch electrode and a second touch electrode in a touch substrate to a great extent. In the existing touch structure, the width of the area where the dummy electrode is located is usually 100 μm to 300 μm, and when the pen point or the finger point of the active pen is located in the area where the dummy electrode is located, because the distance between the pen point or the finger point and the first touch electrode and the second touch electrode is long, the sensing signal is weak, and therefore the problem of low touch precision is caused.

In order to solve the problem of low touch precision in the existing structure, an 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 sub-pixels regularly arranged, the touch substrate includes a plurality of touch electrodes, at least one touch electrode includes a touch dense area and a touch sparse area, the touch sparse area is located on at least one side of the touch dense area close to an adjacent touch electrode, the number of sub-pixels included in an area surrounded by at least one touch grid in the touch dense area is smaller than the number of sub-pixels included 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.

In an exemplary embodiment, the touch electrodes may include first touch electrodes and second touch electrodes, a plurality of the first touch electrodes may be sequentially disposed along a first direction, a plurality of the second touch electrodes may be sequentially disposed along a second direction, the first touch electrodes adjacent to each other in the first direction are connected to each other by first connection portions, the second touch electrodes adjacent to each other in the second direction are connected to each other by second connection portions, and the first direction and the second direction cross each other. At least one of the first touch electrode and the second touch electrode may include a touch-dense area and a touch-sparse area, and the number of sub-pixels included in an area surrounded by at least one touch grid in the touch-dense area is smaller than the number of sub-pixels included in an area surrounded by at least one touch grid in the touch-sparse area.

In another exemplary embodiment, the touch electrodes include third touch electrodes and fourth touch electrodes, the third touch electrodes and the fourth touch electrodes are alternately arranged along a first direction, and the third touch electrodes and the fourth touch electrodes are sequentially arranged along a second direction; the touch substrate further comprises a plurality of first connecting lines and a plurality of second connecting lines extending along the first direction, the first connecting lines and the second connecting lines are alternately arranged along the second direction, the third touch electrodes are connected with the first connecting lines, and the fourth touch electrodes are connected with the second connecting lines. At least one of the third touch electrode, the fourth touch electrode, the first connecting line and the second connecting line may include a touch-dense area and a touch-sparse area, and the number of sub-pixels included in an area surrounded by at least one touch grid in the touch-dense area is smaller than the number of sub-pixels included in an area surrounded by at least one touch grid in the touch-sparse area.

In an exemplary embodiment, the display substrate may include any one or more of: 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 (Electro physical Display) substrate.

In an exemplary embodiment, the display substrate may be an OLED substrate. An Organic Light Emitting Diode (OLED) is an active Light Emitting display device, and has the advantages of self-luminescence, wide viewing angle, high contrast, low power consumption, and very high response speed, and with the continuous development of display technology, a display substrate using an OLED as a Light Emitting device and signal control by a Thin Film Transistor (TFT) has become a mainstream product in the display field at present. 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 a side of the driving circuit layer away from the substrate, and an encapsulation structure layer disposed on a side of the light emitting structure layer away from the substrate. The Touch substrate may be disposed on the package structure layer to form a Touch structure on a Film package (Touch on Film Encapsulation, abbreviated as Touch on TFE).

Fig. 3 is a schematic cross-sectional structure diagram of a touch display panel according to an exemplary embodiment of the disclosure. As shown in fig. 3, in a plane perpendicular to the touch display panel, the touch display panel may include a driving circuit layer 101 disposed on a substrate 1, a light emitting structure layer 102 disposed on a side of the driving circuit layer 101 away from the substrate, an encapsulation structure layer 103 disposed on a side of the light emitting structure layer 102 away from the substrate, and a touch substrate 104 disposed on a side of the encapsulation structure layer 103 away from the substrate, where 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.

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, and only one transistor 101A and one storage capacitor 101B in the pixel driving circuit are exemplified in fig. 3. The light emitting structure layer 103 may include a pixel defining layer and a light emitting device, and the light emitting device may include an anode connected to the drain electrode of the driving transistor 101A through a via hole, an organic light emitting layer connected to the anode, and a cathode connected to the organic light emitting layer, and the organic light emitting layer emits light of a corresponding color under the driving of the anode and the cathode. The encapsulating structure layer 104 may include a first encapsulating layer, a second encapsulating layer and a third encapsulating layer, which are stacked, the first encapsulating layer and the third encapsulating layer may be made of inorganic materials, the second encapsulating layer may be made of organic materials, and the second encapsulating layer is disposed between the first encapsulating layer and the third encapsulating layer, so as to ensure that external water vapor cannot enter the light emitting structure layer 103. The touch substrate 104 may include a first touch insulating layer 71 disposed on the package structure layer 103, a first touch metal layer 72 disposed on the first touch insulating layer 71, a second touch insulating layer 73 covering the first touch metal layer 72, a second touch metal layer 74 disposed on the second touch insulating layer 73, and a touch protective 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.

Fig. 4 is a schematic plan view of a display substrate. As shown in fig. 4, the display substrate may include a plurality of pixel units P regularly arranged on a plane parallel to the display substrate, at least one of the plurality of pixel units P may include a first sub-pixel P1 emitting light of a first color, a second sub-pixel P2 emitting light of a second color, and a third sub-pixel P3 emitting light of a third color, and each of the first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3 may 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, the light emitting devices in the three sub-pixels are respectively connected with the pixel driving circuit of the sub-pixel, and the light emitting devices are configured to emit light with corresponding brightness in response to the currents output by the pixel driving circuit of the sub-pixel.

In an exemplary embodiment, the first sub-pixel P1 may be a red sub-pixel emitting red (R) light, the second sub-pixel P2 may be a blue sub-pixel emitting blue (B) light, the third sub-pixel P3 may be a green sub-pixel emitting green (G) light, three sub-pixels may adopt a delta layout, the rectangular first sub-pixel P1 and the rectangular second sub-pixel P2 may be located at one side of the pixel unit, the rectangular third sub-pixel P3 may be located at the other side of the pixel unit, and the area of the third sub-pixel P3 may be about the sum of the areas of the first sub-pixel P1 and the second sub-pixel P2.

In an exemplary embodiment, the shape of the sub-pixels in the pixel unit may be any one or more of a triangle, a square, a rectangle, a diamond, a pentagon and a hexagon, and the three sub-pixels may be arranged in a horizontal juxtaposition, a vertical juxtaposition or a delta shape, and the disclosure is not limited thereto.

In an exemplary embodiment, the pixel unit may include four sub-pixels, and the four sub-pixels may be arranged in a horizontal parallel manner, a vertical parallel manner, a square shape, a diamond shape, or the like, and the disclosure is not limited thereto.

In an exemplary embodiment, the sub-pixel on the display substrate may include a light-emitting region and a non-light-emitting region, the light-emitting region being a region of the pixel opening in the pixel defining layer, and the non-light-emitting region being a region other than the pixel opening. When the touch electrode in the touch substrate is in a metal grid form, the shape and the position of the grid pattern on the touch substrate are basically the same as those of the sub-pixels on the display substrate, namely the shape and the position of a plurality of grid patterns are in one-to-one correspondence with those of the sub-pixels, the area surrounded by the metal wires in one grid pattern comprises the light emitting areas of the sub-pixels, and the metal wires are positioned in the non-light emitting areas between the adjacent light emitting areas.

Fig. 5 is a schematic diagram of a touch-dense area on a touch display panel according to an exemplary embodiment of the disclosure, and fig. 6 is a schematic diagram of a touch-sparse area on a touch display panel according to an exemplary embodiment of the disclosure, in which dark lines represent metal lines constituting a touch grid, and light lines represent dummy lines not connected to the touch grid. In an exemplary embodiment, the touch grid refers to a minimum grid formed by interweaving a plurality of metal lines and having a touch function, the touch grid may form a voltage loop electrically, the metal lines constituting the touch grid are connected with each other, and the metal lines are disposed between adjacent sub-pixels. In an exemplary embodiment, the dummy lines are disconnected from the metal lines electrically insulated from the touch grid, i.e., the dummy lines are disconnected from the metal lines constituting the touch grid. The dummy lines are arranged between adjacent sub-pixels, the dummy lines and metal lines forming the touch grid can form a dummy grid, or a plurality of dummy lines are interwoven to form the dummy grid, and the area surrounded by the dummy grid contains at least one sub-pixel. In other words, the dummy grid is electrically unable to form a voltage loop.

In an exemplary embodiment, the touch display panel may include a display substrate and a touch substrate stacked. The display substrate may include a plurality of sub-pixels regularly arranged, 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 mesh layer, the metal mesh layer may include a plurality of mesh patterns formed by interlacing a plurality of metal lines, the plurality of mesh patterns may include a first mesh pattern corresponding to a position and a shape of a first sub-pixel on the display substrate, a second mesh pattern corresponding to a position and a shape of a second sub-pixel on the display substrate, and a third mesh pattern corresponding to a position and a shape of a third sub-pixel on the display substrate, the metal lines constituting the mesh patterns are all located in non-light emitting regions of the sub-pixels, an orthographic projection of the metal lines on a plane of the touch display panel is located within a range of an orthographic projection of the non-light emitting regions on the plane of the touch display panel, and an orthographic projection of the light emitting regions on the plane of the touch display panel is located within a range of an orthographic projection of regions surrounded by the metal lines on the plane of the touch display panel. In an exemplary embodiment, the touch-dense area may include a plurality of first touch grids 31, and the first touch grid 31 may include 1 sub-pixel, as shown in fig. 5. The touch sparse region may include a plurality of second touch grids 32, and the second touch grids 32 may include 3 sub-pixels, as shown in fig. 6.

Fig. 7 is a schematic plan view of a touch substrate according to an exemplary embodiment of the disclosure. As shown in fig. 7, 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 disposed along the first direction D1, and the adjacent first touch electrodes 10 in the first direction D1 may be connected to each other by the first connection parts 11. The plurality of second touch electrodes 20 may be sequentially disposed along the second direction D2, and the second touch electrodes 20 adjacent in the second direction D2 may be connected to each other by the second connection parts 21.

In an exemplary embodiment, the touch substrate may further include a plurality of first transmission lines, second transmission lines, first pads, second pads, and the like, so that the first touch electrodes and the second touch electrodes are connected to the driver through the corresponding transmission lines and pads, which is not limited in this disclosure. The driver can apply a driving signal to one touch electrode and receive an output signal from the other touch electrode, so that a stable capacitance is formed between the first touch electrode and the second touch electrode, and when a finger or an active pen touches the touch screen, the touch can cause the capacitance between the first touch electrode and the second touch electrode to change, so that the touch position is determined, and a corresponding touch operation is realized.

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

In an exemplary embodiment, the first touch electrode 10 may be a driving electrode (Tx), and the second touch electrode 20 may be a sensing electrode (Rx); alternatively, the first touch electrode 10 may be a sensing electrode, and the second touch electrode 20 may be a driving electrode.

In an exemplary embodiment, the first and

second touch electrodes

10 and 20 may have a rhombus shape. In some possible implementations, 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, and the disclosure is not limited herein.

In an exemplary embodiment, the at least one first touch electrode 10 may include a first touch-dense region 110 and a first touch-sparse region 120, and the first touch-sparse region 120 may be located at least one side of the first touch-dense region 110 close to the second touch electrode 20. The first touch-sensitive dense region 110 may include a plurality of first touch-sensitive grids, the first touch-sensitive sparse region 120 may include a plurality of second touch-sensitive grids, and the number of sub-pixels included in the region surrounded by at least one first touch-sensitive grid in the first touch-sensitive dense region 110 may be smaller than the number of sub-pixels included in the region surrounded by at least one second touch-sensitive grid in the first touch-sensitive sparse region 120.

In an exemplary embodiment, the at least one second touch electrode 20 may include a second touch-dense region 210 and a second touch-sparse region 220, the second touch-sparse region 220 may be located at least one side of the second touch-dense region 210 close to the first touch electrode 10, and the number of sub-pixels included in the region surrounded by the at least one first touch grid in the second touch-dense region 210 may be smaller than the number of sub-pixels included in the region surrounded by the at least one second touch grid in the second touch-sparse region 220.

Fig. 8 is a schematic diagram of a first touch grid according to an exemplary embodiment of the disclosure, and fig. 9 is a schematic diagram of a second touch grid according to an exemplary embodiment of the disclosure, in which dark lines represent metal lines constituting the touch grid, and light lines represent dummy lines not connected to the touch grid. In an exemplary embodiment, for the plurality of first metal lines 41 extending along the first direction D1 and the plurality of second metal lines 42 extending along the second direction D2 crossing each other, by providing cutouts on the metal lines, touch grids of different sizes may be configured.

In an exemplary embodiment, the plurality of first metal lines 41 and the plurality of second metal lines 42 cross each other to form a plurality of rectangular grid patterns, and each of the plurality of grid patterns is the first touch grid 31, as shown in fig. 8, and fig. 8 may be an enlarged view of a region B in fig. 7. In an exemplary embodiment, since the positions and shapes of the grid patterns on the touch substrate correspond to the positions and shapes of the sub-pixels on the display substrate one to one, the first touch grid 31 includes one grid pattern indicating that the first touch grid 31 includes one sub-pixel.

In the exemplary embodiment, the plurality of first metal lines 41 and the plurality of second metal lines 42 cross each other, but a cut is provided on the first metal lines 41 and/or the second metal lines 42, so that the second touch grid 32 may be formed. A slit may be understood as an imaginary line cutting the metal wire, the slit isolating the metal wires on both sides of the slit from each other. The area surrounded 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, as shown in fig. 9, where fig. 9 may be an enlarged view of the area C in fig. 7.

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 interleaved may form the dummy grid 50. As shown in fig. 9, the area surrounded by the second touch grid 32 may include three dummy grids 50. Since the dummy grid is formed by providing the cutouts in the grid pattern, the shape and area of the dummy grid are the same as those of the grid pattern, the position and shape of the dummy grid correspond to those of the sub-pixels on the display substrate one-to-one, or at least one sub-pixel is included in the area surrounded by the dummy grid, and thus the second touch grid 32 includes three dummy grids 50, which means that the second touch grid 32 includes three sub-pixels.

In an exemplary embodiment, the area surrounded by the first touch grid 31 shown in fig. 8 includes 1 sub-pixel, the area surrounded by the second touch grid 32 shown in fig. 9 includes 3 sub-pixels, the number of sub-pixels included in the area surrounded by the first touch grid 31 is smaller than the number of sub-pixels included in the area surrounded by the second touch grid 32, and thus the area where the first touch grid 31 is located is a touch-dense area, and the area where the second touch grid 32 is located is a touch-sparse area.

In an exemplary embodiment, the plurality of first metal lines and the plurality of second metal lines cross each other, a plurality of grid patterns arranged regularly may be formed, and the touch grids of different sizes may be formed by providing or not providing slits on the metal lines of the corresponding grid patterns.

In an exemplary embodiment, a notch is formed in the grid pattern at the junction of the first touch electrode and the second touch electrode, and the notch 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, and the first touch electrode and the second touch electrode can be isolated from each other.

In an exemplary embodiment, the touch dense area and the touch sparse area of the present disclosure relate to the number of sub-pixels included in the area surrounded by the touch grid, and the smaller the number of sub-pixels included in the area surrounded by the touch grid, the greater the density of the area in which the touch grid is located. For example, the area surrounded by the first touch grid 31 shown in fig. 8 includes 1 sub-pixel, the area surrounded by the second touch grid 32 shown in fig. 9 includes 3 sub-pixels, and the number of sub-pixels included in the first touch grid 31 is smaller 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 smaller, and the number of sub-pixels included in the area surrounded by the second touch grid 32 is larger, for a set area of the same size, the number of the first touch grids 31 that can be set in the set area is larger, and the number of the second touch grids 32 that can be set is smaller, so that the density of the area where the first touch grids 31 are located is greater than the density of the area where the second touch grids 32 are located. That is, the area where the first touch grid 31 is located is a touch-intensive area relative to the area where the second touch grid 32 is located, and the area where the second touch grid 32 is located is a touch-sparse area relative to the area where the first touch grid 31 is located.

Fig. 10 is a schematic structural diagram of a first touch electrode according to an exemplary embodiment of the disclosure. As shown in fig. 10, the first touch electrode 10 may include a first touch-dense region 110 and a first touch-sparse region 120, the first touch-dense region 110 may be located in a middle region of the first touch electrode 10, the first touch-sparse region 120 may be located in an edge region of the first touch electrode 10, and the first touch-sparse region 120 may be located on at least one side of the first touch-dense region 110.

In an exemplary embodiment, the first touch-dense region 110 may include a plurality of first touch grids 31, the first touch-sparse region 120 may include a plurality of second touch grids 32, and the number of sub-pixels included in the region surrounded by at least one first touch grid 31 in the first touch-dense region 110 may be smaller than the number of sub-pixels included in the region surrounded by the second touch grids 32 in the first touch-sparse region 120.

In an exemplary embodiment, the first width L1 of the first touch sparse region 120 may be about 50 μm to 200 μm along a direction away from the first touch dense region 110.

Fig. 11 is a schematic structural diagram of a second touch electrode according to an exemplary embodiment of the disclosure. As shown in fig. 11, the second touch electrode 20 may include a second touch-dense region 210 and a second touch-sparse region 220, the second touch-dense region 210 may be located in a middle region of the second touch electrode 20, the second touch-sparse region 220 may be located in an edge region of the second touch electrode 20, and the second touch-sparse region 220 may be located on at least one side of the second touch-dense region 210.

In an exemplary embodiment, the second touch-dense region 210 may include a plurality of first touch grids 31, the second touch-sparse region 220 may include a plurality of second touch grids 32, and the number of sub-pixels included in the region surrounded by at least one first touch grid 31 in the second touch-dense region 210 may be smaller than the number of sub-pixels included in the region surrounded by the second touch grids 32 in the second touch-sparse region 220.

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

In an exemplary embodiment, the 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 about 2 to 4.

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

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.

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

In an exemplary embodiment, at least one Dummy (Dummy) area may be disposed in the first touch-dense area 110 and the second touch-dense area 210, and the disclosure is not limited thereto.

The structure of the first touch electrode and the second touch electrode shown in fig. 10 and fig. 11 is merely an example, and in actual implementation, the corresponding structure may be changed according to actual needs, and the disclosure is not limited herein. For example, for an adjacent first touch electrode 10 and an adjacent second touch electrode 20, the edge area of the first touch electrode 10 close to the second touch electrode 20 is provided with a first sparse touch area 120, the edge area of the second touch electrode 20 close to the first touch electrode 10 is provided with a second sparse touch area 220, the first sparse touch area 120 of the first touch electrode 10 is adjacent to the second sparse touch area 220 of the second touch electrode 20, and the first sparse touch area 120 and the second sparse touch area 220 are isolated from each other by providing a plurality of cuts. For another example, for an adjacent first touch electrode 10 and an adjacent second touch electrode 20, the edge area of the first touch electrode 10 close to the second touch electrode 20 is provided with a first sparse touch region 120, the edge area of the second touch electrode 20 close to the first touch electrode 10 is not provided with a second sparse touch region 220, the first sparse touch region 120 of the first touch electrode 10 is adjacent to the second dense touch region 210 of the second touch electrode 20, and the first sparse touch region 120 and the second dense touch region 210 are isolated from each other by providing a plurality of cuts. For another example, for an adjacent first touch electrode 10 and an adjacent second touch electrode 20, the edge area of the first touch electrode 10 close to the second touch electrode 20 is not provided with the first touch sparse region 120, the edge area of the second touch electrode 20 close to the first touch electrode 10 is provided with the second touch sparse region 220, the first touch dense region 110 of the first touch electrode 10 is adjacent to the second touch sparse region 220 of the second touch electrode 20, and the first touch dense region 110 and the second touch sparse region 220 are isolated from each other by providing a plurality of cuts.

Fig. 12 is a schematic plan view of another touch substrate according to an exemplary embodiment of the disclosure. As shown in fig. 12, in an exemplary embodiment, the touch substrate may include a metal mesh layer including a plurality of mesh patterns formed by interweaving a plurality of metal lines. 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 disposed along the first direction D1, the plurality of third touch electrodes 30 may be sequentially disposed along the second direction D2, and the plurality of fourth touch electrodes 40 may be sequentially disposed along the second direction D2. The first connection lines 61 and the second connection lines 62 may have a line shape 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 plurality of third touch electrodes 30 and the plurality of fourth touch electrodes 40 alternately arranged along the first direction D1, the plurality of third touch electrodes 30 are connected to the first connection line 61, the plurality of fourth touch electrodes 40 are connected to the second connection line 62, and portions of the fourth touch electrodes 40 adjacent in the second direction D2 may be connected to each other by the third connection portions 63.

In an exemplary embodiment, the touch substrate may further include a plurality of third transmission lines, fourth transmission lines, third pads, fourth pads, and the like, so that the third touch electrodes and the fourth touch electrodes are connected to the driver through the corresponding transmission lines and pads, which is not limited in this disclosure. The driver can apply a driving signal to one touch electrode and receive an output signal from the other touch electrode, so that a stable capacitance is formed between the third touch electrode and the fourth touch electrode, and when a finger or an active pen touches the touch screen, the touch can cause the capacitance between the third touch electrode and the fourth touch electrode to change, so that the touch position is determined, and a corresponding touch operation is realized.

In an exemplary embodiment, the touch substrate may include a bridge layer, an insulating layer, and a metal mesh layer stacked on a plane perpendicular to the touch substrate. In an exemplary embodiment, the plurality of third touch electrodes 30, the plurality of fourth touch electrodes 40, the plurality of first connection lines 61, and the plurality of second connection lines 62 may be disposed on the same layer on the metal mesh layer and may be formed through 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 on 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 hole.

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); alternatively, the third touch electrode 30 may be a sensing electrode, and the fourth touch electrode 40 may be a driving electrode.

In an exemplary embodiment, the third and

fourth touch electrodes

30 and 40 may have a rectangular shape. 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, and the disclosure is not limited herein.

Fig. 13 is a schematic structural diagram of a third touch electrode according to an exemplary embodiment of the disclosure. As shown in fig. 12 and 13, the at least one third touch electrode 30 may include a third touch-dense region 130 and a third touch-sparse region 140, the third touch-dense region 130 may be located in a middle region of the third touch electrode 30, the third touch-sparse region 140 may be located in an edge region of the third touch electrode 30, and the third touch-sparse region 140 may be located at least one side of the third touch-dense region 130.

In an exemplary embodiment, the third touch-dense region 130 may include a plurality of third touch grids 33, the third touch-sparse region 140 may include a plurality of fourth touch grids 34, and the number of sub-pixels included in the region surrounded by at least one third touch grid 33 in the third touch-dense region 130 may be smaller than the number of sub-pixels included in the region surrounded by the fourth touch grid 34 in the third touch-sparse region 140.

In an exemplary embodiment, the third width L3 of the third touch sparse region 140 may be about 50 μm to 200 μm along a direction away from the third touch dense region 130.

In an exemplary embodiment, the position of the third touch sparse region 140 of the third touch electrode 30 may include any one or more of the following: the third touch-sensitive dense region 130 may be located at least one side close to the fourth touch electrode 40, the third touch-sensitive dense region 130 may be located at least one side close to the first connecting line 61, and the third touch-sensitive dense region 130 may be located at least one side close to the second connecting line 62.

In an exemplary embodiment, the at least one first connection line 61 may include a fifth touch-dense region 150 and a fifth touch-sparse region 160, the fifth touch-dense region 150 may be located in a middle region of the second direction D2 of the first connection line 61, and the fifth touch-sparse region 160 may be located in an edge region of the second direction D2 of the first connection line 61, that is, the fifth touch-sparse region 160 may be located at one side or both sides of the second direction D2 of the fifth touch-dense region 150.

In an exemplary embodiment, the fifth touch-dense region 150 may include a plurality of fifth touch grids 35, the fifth touch-sparse region 160 may include a plurality of sixth touch grids 36, and the number of sub-pixels included in the region surrounded by at least one fifth touch grid 35 in the fifth touch-dense region 150 may be smaller than the number of sub-pixels included in the region surrounded by the sixth touch grids 36 in the fifth touch-sparse region 160.

In an exemplary embodiment, the position of the fifth touch sparse region 160 of the first connection line 61 may include any one or more of the following: can be located on at least one side of the fifth touch-sensitive dense region 150 close to the third touch-sensitive electrode 30, and can be located on at least one side of the fifth touch-sensitive dense region 150 close to the fourth touch-sensitive electrode 40.

In an exemplary embodiment, the fifth width L5 of the fifth touch sparse region 160 may be about 50 μm to 200 μm along a direction away from the fifth touch dense region 150.

Fig. 14 is a schematic structural diagram of a fourth touch electrode according to an exemplary embodiment of the disclosure. As shown in fig. 12 and 14, the at least one fourth touch electrode 40 may include a fourth touch-dense region 230 and a fourth touch-sparse region 240, the fourth touch-dense region 230 may be located in a middle region of the fourth touch electrode 40, the fourth touch-sparse region 240 may be located in an edge region of the fourth touch electrode 40, and the fourth touch-sparse region 240 may be located at least one side of the fourth touch-dense region 230.

In an exemplary embodiment, the fourth touch-dense region 230 may include a plurality of third touch grids 33, the fourth touch-sparse region 240 may include a plurality of fourth touch grids 34, and the number of sub-pixels included in the region surrounded by at least one third touch grid 33 in the fourth touch-dense region 230 may be smaller than the number of sub-pixels included in the region surrounded by the fourth touch grid 34 in the fourth touch-sparse region 240.

In an exemplary embodiment, the fourth width L4 of the fourth touch sparse region 240 may be about 50 μm to 200 μm along a direction away from the fourth touch dense region 230.

In an exemplary embodiment, the position of the fourth touch sparse region 240 of the fourth touch electrode 40 may include any one or more of the following: the fourth touch-dense region 230 may be located at least one side of the third touch electrode 30, the fourth touch-dense region 230 may be located at least one side of the first connecting line 61, and the fourth touch-dense region 230 may be located at least one side of the second connecting line 62.

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

In an exemplary embodiment, the sixth touch-dense region 250 may include a plurality of fifth touch grids 35, the sixth touch-sparse region 260 may include a plurality of sixth touch grids 36, and the number of sub-pixels included in the region surrounded by at least one fifth touch grid 35 in the sixth touch-dense region 250 may be smaller than the number of sub-pixels included in the region surrounded by the sixth touch grids 36 in the sixth touch-sparse region 260.

In an exemplary embodiment, the position of the sixth touch sparse region 260 of the second connection line 62 may include any one or more of the following: can be located on at least one side of the sixth touch-sensitive dense region 250 close to the third touch-sensitive electrode 30, and can be located on at least one side of the sixth touch-sensitive dense region 250 close to the fourth touch-sensitive electrode 40.

In an exemplary embodiment, the sixth width L6 of the sixth touch sparse region 260 may be about 50 μm to 200 μm in a direction away from the sixth touch dense region 250.

In an exemplary embodiment, the 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 about 2 to 4.

In an exemplary embodiment, the 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 about 2 to 4.

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

In an exemplary embodiment, the shapes and areas of the third and

fifth touch grids

33 and 35 may be substantially the same, and the shapes and areas of the fourth and

sixth touch grids

34 and 36 may be substantially the same.

In an exemplary embodiment, the shapes and areas of the plurality of third touch grids 33 in the third touch-dense region 130 and the fourth touch-dense region 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 region 140 and the fourth touch sparse region 240 may be the same, or may be different.

In an exemplary embodiment, at least one dummy area may be disposed in the third touch-dense area 130 and the fourth touch-dense area 230, and the disclosure is not limited herein.

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 region 160 and the sixth touch sparse region 260 may be the same, or may be different.

In an exemplary embodiment, the structures of the third touch electrode, the fourth touch electrode, the first connection line and the second connection line shown in fig. 13 and 14 are only an example, and in actual implementation, the corresponding structures may be changed according to actual needs, and the touch sparse area of the two touch electrodes may be adjacent, or the touch dense area and the touch dense area of the two touch electrodes may be adjacent, and the disclosure is not limited herein.

As can be seen from the structure of the touch display panel, in the exemplary embodiment of the disclosure, the touch electrode is provided with the dense touch area and the sparse touch area, the sparse touch area is located in the edge area close to the adjacent touch electrode, and the number of sub-pixels included in the area surrounded by the touch grid in the dense touch area is smaller than the number of sub-pixels included in the area surrounded by the touch grid in the sparse touch area, so that not only can the touch precision be ensured, but also the touch sensitivity can be improved, and the report rate and the signal-to-noise ratio can be improved. For current structure sets up the dummy electrode between two touch-control electrodes, this disclosure is through setting up the sparse district of touch-control that has the touch-control function between two touch-control electrodes, and when initiative pen point or fingertip are located the sparse district of touch-control, because the distance of nib or fingertip and touch-control electrode is nearer, the inductive signal is strong, therefore has higher touch-control precision and linearity, has effectively solved the lower problem of current structure touch-control precision. By arranging the touch sparse area in the touch electrode, the basic mutual capacitance value (Cm) formed between the driving electrode and the sensing electrode is reduced on the whole, and the mutual capacitance value change amount (delta Cm) caused by touch and no touch is improved on the whole, so that the touch sensitivity (delta Cm/Cm) is improved, and the touch precision and the linearity are further improved. By arranging the 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 report rate and the signal-to-noise ratio are improved, and the touch performance is improved.

The exemplary embodiment of the present disclosure also provides a display device, which may include the aforementioned touch display panel.

In an exemplary embodiment, the display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.

It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made in the present disclosure without departing from the spirit and scope of the present disclosure and shall be covered by the appended claims.

Claims

1. A touch display panel is characterized by comprising a display substrate and a touch substrate arranged on the display substrate, wherein the display substrate comprises a plurality of sub-pixels which are regularly distributed, the touch substrate comprises a plurality of touch electrodes, at least one touch electrode comprises a touch dense area and a touch sparse area, the touch sparse area is positioned on at least one side, close to an adjacent touch electrode, of the touch dense area, the number of the sub-pixels contained in an area defined by at least one touch grid in the touch dense area is smaller than the number of the sub-pixels contained in an area defined by at least one touch grid in the touch sparse area, and the touch grid is a minimum grid which is formed by interweaving a plurality of metal wires and has a touch function.

2. The touch display panel according to claim 1, wherein 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.

3. The touch display panel according to claim 2, wherein the metal lines constituting the touch grid are disposed between adjacent sub-pixels, and the dummy lines are disposed between adjacent sub-pixels.

4. The touch display panel according to claim 3, wherein the dummy lines and the metal lines constituting the touch grid form a dummy grid, or a plurality of dummy lines are interlaced to form a dummy grid, and the area surrounded by the dummy grid comprises at least one sub-pixel.

5. The touch display panel according to any one of claims 1 to 4, wherein the touch electrodes include first touch electrodes and second touch electrodes, the first touch electrodes are sequentially arranged along a first direction, the second touch electrodes are sequentially arranged along a second direction, the first touch electrodes adjacent to each other in the first direction are connected to each other by a first connection portion, the second touch electrodes adjacent to each other in the second direction are connected to each other by a second connection portion, and the first direction and the second direction intersect each other.

6. The touch display panel according to claim 5, wherein the at least one first touch electrode comprises 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 comprises a plurality of first touch grids, the first touch sparse area comprises a plurality of second touch grids, and the number of the sub-pixels contained in at least one first touch grid is smaller than the number of the sub-pixels contained in the second touch grid.

7. The touch display panel according to claim 6, wherein the width of the first touch sparse area is 50 μm to 200 μm in a direction away from the first touch dense area.

8. The touch display panel according to claim 5, wherein the at least one second touch electrode comprises a second touch-dense region and a second touch-sparse region, the second touch-sparse region being located on at least one side of the second touch-dense region close to the first touch electrode; the second touch-sensitive dense area comprises a plurality of first touch-sensitive meshes, the second touch-sensitive sparse area comprises a plurality of second touch-sensitive meshes, and at least one first touch-sensitive mesh contains a greater number of the sub-pixels than the second touch-sensitive mesh contains.

9. The touch display panel according to claim 8, wherein the width of the second touch sparse area is 50 μm to 200 μm in a direction away from the second touch dense area.

10. The touch display panel of claim 6 or 8, wherein the 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.

11. The touch display panel according to any one of claims 1 to 4, wherein the touch electrodes include third touch electrodes and fourth touch electrodes, the third touch electrodes and the fourth touch electrodes are alternately arranged along a first direction, the third touch electrodes and the fourth touch electrodes are sequentially arranged along a second direction, and the first direction and the second direction intersect; the touch substrate further comprises a plurality of first connecting lines and a plurality of second connecting lines extending along the first direction, the first connecting lines and the second connecting lines are alternately arranged along the second direction, the third touch electrodes are connected with the first connecting lines, and the fourth touch electrodes are connected with the second connecting lines.

12. The touch display panel of claim 11, wherein the at least one third touch electrode comprises a third touch-dense area and a third touch-sparse area, and the position of the third touch-sparse area comprises any one or more of the following: the third touch-control dense area is positioned at least one side close to the fourth touch-control electrode, at least one side close to the first connecting line and at least one side close to the second connecting line; the third touch-dense area comprises a plurality of third touch grids, the third touch-sparse area comprises a plurality of fourth touch grids, and at least one third touch grid comprises a smaller number of sub-pixels than the fourth touch grid comprises.

13. The touch display panel of claim 12, wherein the third touch sparse region has a width of 50 μ ι η to 200 μ ι η along a direction away from the third touch dense region.

14. The touch display panel of claim 11, wherein at least one fourth touch electrode comprises a fourth touch-dense area and a fourth touch-sparse area, and the position of the fourth touch-sparse area comprises any one or more of the following: the fourth touch dense area is positioned at least one side close to the third touch electrode, at least one side close to the first connecting line and at least one side close to the second connecting line; the fourth touch dense area comprises a plurality of third touch grids, the fourth touch sparse area comprises a plurality of fourth touch grids, and the number of the sub-pixels contained in at least one third touch grid is smaller than the number of the sub-pixels contained in the fourth touch grid.

15. The touch display panel of claim 14, wherein the fourth touch sparse area has a width of 50 μ ι η to 200 μ ι η along a direction away from the fourth touch dense area.

16. The touch display panel of claim 12 or 14, wherein 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.

17. The touch display panel of claim 11, wherein the at least one first connection line comprises a fifth touch-dense area and a fifth touch-sparse area, and a position of the fifth touch-sparse area comprises any one or more of the following: the second touch-control dense area is positioned at least one side close to the third touch-control electrode and at least one side close to the fourth touch-control electrode; the fifth touch dense area comprises a plurality of fifth touch grids, the fifth touch sparse area comprises a plurality of sixth touch grids, and the number of the sub-pixels contained in at least one fifth touch grid is smaller than the number of the sub-pixels contained in the sixth touch grids.

18. The touch display panel of claim 17, wherein the width of the fifth touch sparse area is 50 μ ι η to 200 μ ι η along a direction away from the fifth touch dense area.

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

20. The touch display panel of claim 19, wherein the sixth sparse touch area has a width of 50 μ ι η to 200 μ ι η along a direction away from the sixth dense touch area.

21. The touch display panel of claim 17 or 19, wherein 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.

22. A display device comprising the touch display panel according to any one of claims 1 to 21.