Touch structure, touch display panel and touch display device

Abstract

The present disclosure relates to a touch structure, a touch display panel and a touch display device. The touch structure includes a first touch area and a second touch area. The touch sensitivity of the second touch area is greater than the touch sensitivity of the first touch area. The second touch area is used as a touch area with a higher touch sensitivity and a higher frequency of touch use, and the first touch area is used as a touch area with a lower touch sensitivity and a lower frequency of touch use. Different touch areas are distinguished according to the frequency of touch use and the touch sensitivity, so that the power consumption of the touch circuit can be reduced.

Description

Technical Field

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

[0002] In the display field, OLED display is considered to be the next generation of flat panel display emerging application technology due to its excellent characteristics. In OLED manufacturing technology, the touch circuit is usually designed as an integrated circuit with the display panel.

[0003] The touch requirements of different areas on the display panel are actually different. The touch sensitivity and touch usage frequency vary greatly in different areas. To ensure touch sensitivity, the mesh pattern of the touch area of ​​the existing touch panel is composed of a single pattern array. The touch unit of this indifferent mesh pattern is small, which will result in a large number of channels for the driving electrode (Tx) and the sensing electrode (Rx), and the power consumption of the touch circuit is higher.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] The purpose of the present disclosure is to overcome the problem of high power consumption of touch circuits caused by existing touch structures, and to provide a touch structure, a touch display panel and a touch display device.

[0006] According to one aspect of the present disclosure, a touch structure is provided, including a first touch area and a second touch area, wherein the touch sensitivity of the second touch area is greater than the touch sensitivity of the first touch area.

[0007] In one embodiment of the present disclosure, the first touch region includes a plurality of first touch units arranged in an array, and the second touch region includes a plurality of second touch units arranged in an array, and the area of ​​the second touch units is smaller than that of the first touch units.

[0008] In one embodiment of the present disclosure, the first touch area includes a plurality of first touch units arranged in an array, the second touch area includes a plurality of second touch units arranged in an array, and the touch sensitivity of the second touch units is greater than the touch sensitivity of the first touch units.

[0009] In one embodiment of the present disclosure, the second touch area is arranged adjacent to the first touch area, the first touch unit includes an intersecting first side and a second side, the second touch unit includes an intersecting third side and a fourth side, the first side of adjacent first touch units is adjacent to the third side of at least two second touch units, or the second side of adjacent first touch units is adjacent to the fourth side of at least two second touch units.

[0010] In one embodiment of the present disclosure, the first touch control unit includes a first touch control electrode portion and a second touch control electrode portion, the first side is located at the first touch control electrode portion, and the second side is located at the second touch control electrode portion, the second touch control unit includes a third touch control electrode portion and a fourth touch control electrode portion, the third side is located at the third touch control electrode portion, and the fourth side is located at the fourth touch control electrode portion, the first touch control electrode portion is adjacent to at least two third touch control electrode portions, or the second touch control electrode portion is adjacent to at least two fourth touch control electrode portions.

[0011] In one embodiment of the present disclosure, the first touch unit includes a first touch electrode portion and a second touch electrode portion, the second touch unit includes a third touch electrode portion and a fourth touch electrode portion, a first boundary line is formed between the first touch electrode portion and the second touch electrode portion through a first finger-interpolating structure, and a second boundary line is formed between the third touch electrode portion and the fourth touch electrode portion through a second finger-interpolating structure, and the length of the second boundary line is greater than the length of the first boundary line.

[0012] In one embodiment of the present disclosure, the first interdigitated finger structure includes a first interdigitated finger portion provided on the first touch electrode portion and a second interdigitated finger portion provided on the second touch electrode portion, the first interdigitated finger portion and the second interdigitated finger portion are insulated from each other on the same layer and are nested with each other, and the second interdigitated finger structure includes a third interdigitated finger portion provided on the third touch electrode portion and a fourth interdigitated finger portion provided on the fourth touch electrode portion, the third interdigitated finger portion and the fourth interdigitated finger portion are insulated from each other on the same layer and are nested with each other, and the number of the third interdigitated finger portions is greater than the number of the first interdigitated finger portions.

[0013] In one embodiment of the present disclosure, a first protrusion is provided on both sides of the first fork finger portion, a second protrusion is provided on both sides of the second fork finger portion, the first protrusion and the second protrusion are arranged in the same layer and insulated and nested with each other; a third protrusion is provided on both sides of the third fork finger portion, a fourth protrusion is provided on both sides of the fourth fork finger portion, the third protrusion and the fourth protrusion are arranged in the same layer and insulated and nested with each other.

[0014] In one embodiment of the present disclosure, two adjacent first touch electrode portions form a first touch electrode unit, two adjacent second touch electrode portions form a second touch electrode unit, two adjacent third touch electrode portions form a third touch electrode unit, and two adjacent fourth touch electrode portions form a fourth touch electrode unit. The first touch electrode unit, the second touch electrode unit, the third touch electrode unit and the fourth touch electrode unit are all provided with a plurality of mesh holes for exposing sub-pixels.

[0015] According to another aspect of the present disclosure, a touch display panel is provided, comprising a display substrate and the touch structure according to one aspect of the present disclosure, wherein the touch structure is disposed on one side of the display substrate.

[0016] In one embodiment of the present disclosure, the touch display panel is provided with a game operation area, and the second touch area is provided in the game operation area.

[0017] In one embodiment of the present disclosure, the touch display panel is provided with a one-hand operation area within the reach of one hand, and the second touch area is provided in the one-hand operation area.

[0018] In one embodiment of the present disclosure, the touch display panel is provided with an opening, and the second touch area is provided around the opening.

[0019] In one embodiment of the present disclosure, the edge of the touch display panel is a curved surface, and the second touch area is disposed at the edge of the touch display panel.

[0020] In one embodiment of the present disclosure, the touch display panel is provided with a bending area, and the second touch area is provided in the bending area.

[0021] According to another aspect of the present disclosure, a touch display device is provided, including the touch display panel according to another aspect of the present disclosure.

[0022] The touch control structure disclosed in the present invention includes a first touch control area and a second touch control area, wherein the touch sensitivity of the second touch control area is greater than the touch sensitivity of the first touch control area. The second touch control area is used as a touch control area with a higher touch sensitivity and a higher frequency of touch use, and the first touch control area is used as a touch control area with a lower touch sensitivity and a lower frequency of touch use. Different touch control areas are distinguished according to the frequency of touch use and the touch sensitivity, so that the power consumption of the touch control circuit can be reduced.

[0023] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0025] Figure 1 It is a structural schematic diagram of a touch structure involved in the related technology.

[0026] Figure 2 It is a schematic diagram of the structure of the touch control structure involved in the embodiment of the present disclosure.

[0027] Figure 3 FIG. 4 is a schematic diagram of the connection between the first touch area and the second touch area involved in the embodiment of the present disclosure.

[0028] Figure 4 FIG. 4 is a schematic diagram showing the connection between the first touch control unit and the second touch control unit involved in the embodiment of the present disclosure.

[0029] Figure 5 It is a structural schematic diagram of a second touch unit involved in an embodiment of the present disclosure.

[0030] Figure 6 It is a schematic structural diagram of another second touch unit involved in an embodiment of the present disclosure.

[0031] Figure 7 It is a structural schematic diagram of another second touch unit involved in an embodiment of the present disclosure.

[0032] Figure 8 The figure is a schematic diagram of the structure of another second touch unit involved in the embodiment of the present disclosure.

[0033] Fig. 9 It is a schematic diagram of the structure of the touch control structure in the game product involved in the embodiment of the present disclosure.

[0034] Fig.10 It is a schematic diagram of the structure of the touch structure in the one-handed use product involved in the embodiment of the present disclosure.

[0035] Fig.11 It is a schematic diagram of the structure of the touch structure in the punching product involved in the embodiment of the present disclosure.

[0036] Fig.12 It is a schematic diagram of the structure of a touch structure in a product with a curved edge involved in an embodiment of the present disclosure.

[0037] Fig.13 It is a schematic diagram of the structure of the touch structure in the foldable product involved in the embodiment of the present disclosure.

[0038] In the figure: 1-first touch area, 10-first touch unit, 101-first touch electrode portion, 1011-first side, 1012-first interdigital portion, 1013-first protrusion, 102-second touch electrode portion, 1021-second side, 1022-second interdigital portion, 1023-second protrusion, 11-first touch electrode unit, 111-first mesh, 12-second touch electrode unit, 121-second mesh; 2-second touch Area, 20-second touch unit, 201-third touch electrode portion, 2011-third side, 2012-third interdigital portion, 2013-third protrusion, 202-fourth touch electrode portion, 2021-fourth side, 2022-fourth interdigital portion, 2023-fourth protrusion, 21-third touch electrode unit, 211-third mesh, 22-fourth touch electrode unit, 221-fourth mesh; 3-touch area, 30-touch unit. DETAILED DESCRIPTION

[0039] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present disclosure will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0040] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the illustration to another component, these terms are used in this specification only for convenience, such as according to the orientation of the examples described in the drawings. It is understood that if the device of the illustration is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0041] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used merely as labels and are not intended to limit the quantity of their objects.

[0042] like Figure 1As shown, in order to ensure touch sensitivity in the related art, the mesh pattern of the touch area 3 of the existing touch panel is composed of a single pattern array. The touch unit 30 of this indifferent mesh pattern is smaller, which will result in a larger number of channels of the driving electrode (Tx) and the sensing electrode (Rx), and a higher power consumption of the touch circuit.

[0043] The embodiment of the present disclosure provides a touch control structure, which includes a first touch control area 1 and a second touch control area 2 , wherein the touch sensitivity of the second touch control area 2 is greater than the touch sensitivity of the first touch control area 1 .

[0044] The second touch area 2 is used as a touch area with higher touch sensitivity and touch use frequency, and the first touch area 1 is used as a touch area with lower touch sensitivity and touch use frequency. Different touch areas are distinguished according to touch use frequency and touch sensitivity, which can reduce the power consumption of the touch circuit.

[0045] The touch control structure includes a first touch control area 1 and a second touch control area 2. The first touch control area 1 includes a plurality of first touch control units 10 arranged in an array. The second touch control area 2 includes a plurality of second touch control units 20 arranged in an array. The first touch control electrode portion 101 and the third touch control electrode portion 201 have the same area. The touch sensitivity of the second touch control unit 20 is greater than the touch sensitivity of the first touch control unit 10. Figure 2 As shown, in order to further distinguish the sensitivity of the first touch unit 10 and the second touch unit, based on the above touch structure, the area of ​​the second touch unit 20 can be set to be smaller than the area of ​​the first touch unit 10.

[0046] The second touch area 2 is arranged adjacent to the first touch area 1, and the first side 1011 of the adjacent first touch unit 10 is adjacent to at least two third sides 2011 of the second touch unit 20, or the second side 1021 of the adjacent first touch unit 10 is adjacent to at least two fourth sides 2021 of the second touch unit 20. The first touch electrode portion 101 is adjacent to at least two third touch electrode portions 201, or the second touch electrode portion 102 is adjacent to at least two fourth touch electrode portions 202. With the same touch area, the second touch area 2 has more second touch units 20 sensing the change in mutual capacitance before and after touch, which can further improve the touch sensitivity of the second touch area 2.

[0047] like Figure 3 and Figure 4As shown, the first touch control unit 10 includes an intersecting first side 1011 and a second side 1021, the second touch control unit 20 includes an intersecting third side 2011 and a fourth side 2021, the first side 1011 of the adjacent first touch control unit 10 is adjacent to the two third sides 2011 of the second touch control unit 20, or the second side 1021 of the adjacent first touch control unit 10 is adjacent to the two fourth sides 2021 of the second touch control unit 20.

[0048] The first touch control unit 10 includes a first touch control electrode portion 101 and a second touch control electrode portion 102, and the second touch control unit 20 includes a third touch control electrode portion 201 and a fourth touch control electrode portion 202. The first touch control electrode portion 101 is equal to the area of ​​the second touch control electrode portion 102, and the third touch control electrode portion 201 is equal to the area of ​​the fourth touch control electrode portion 202. The first touch control electrode portion 101 and the second touch control electrode portion 102 are insulated from each other and spaced apart, and the third touch control electrode portion 201 and the fourth touch control electrode portion 202 are insulated from each other and spaced apart.

[0049] Two first touch electrode portions 101 adjacent in the first direction are electrically connected via a first connection portion, and two second touch electrode portions 102 adjacent in the second direction are electrically connected via a second connection portion. Two third touch electrode portions 201 adjacent in the first direction are electrically connected via a third connection portion, and two fourth touch electrode portions 202 adjacent in the second direction are electrically connected via a fourth connection portion. The first direction and the second direction may be perpendicular to each other.

[0050] The first side 1011 is located at the first touch electrode portion 101, the second side 1021 is located at the second touch electrode portion 102, the third side 2011 is located at the third touch electrode portion 201, and the fourth side 2021 is located at the fourth touch electrode portion 202. In the first touch area 1, two first touch electrode portions 101 are adjacent to each other, and two second touch electrode portions 102 are adjacent to each other. In the second touch area 2, two third touch electrode portions 201 are adjacent to each other, and two fourth touch electrode portions 202 are adjacent to each other. Between the first touch area 1 and the second touch area 2, the first touch electrode portion 101 is adjacent to the two third touch electrode portions 201, or the second touch electrode portion 102 is adjacent to the two fourth touch electrode portions 202.

[0051] The difference in sensitivity between the first touch electrode portion 101 and the third touch electrode portion 201 is explained as follows. When the areas of the first touch electrode portion 101 and the third touch electrode portion 201 remain basically unchanged, the side length of the third touch electrode portion 201 is made greater than the side length of the first touch electrode portion 101. This can effectively increase the mutual capacitance without increasing the self-capacitance of the first touch electrode portion 101 and the second touch electrode portion 102, thereby distinguishing the sensitivity of the first touch electrode portion 101 and the third touch electrode portion 201.

[0052] Specifically, the cooperation mode between the first touch electrode portion 101 and the second touch electrode portion 102 may not be changed, and a second intersection line may be formed between the third touch electrode portion 201 and the fourth touch electrode portion 202 through the cooperation of the second finger insertion structure, and the length of the second intersection line is greater than the side lengths of the first touch electrode portion 101 and the third touch electrode portion 201. The touch sensitivity of the first touch unit 10 may also be improved, and the first intersection line may be formed between the first touch electrode portion 101 and the second touch electrode portion 102 through the cooperation of the first finger insertion structure, so that the length of the second intersection line is greater than the length of the first intersection line.

[0053] The first interdigitated finger structure may include a first interdigitated finger portion 1012 provided at the first touch electrode portion 101 and a second interdigitated finger portion 1022 provided at the second touch electrode portion 102. The first interdigitated finger portion 1012 and the second interdigitated finger portion 1022 are insulated and arranged in a same layer and nested with each other. Figure 5 As shown, the second interdigitated finger structure may include a third interdigitated finger portion 2012 provided on the third touch electrode portion 201 and a fourth interdigitated finger provided on the fourth touch electrode portion 202. The third interdigitated finger portion 2012 and the fourth interdigitated finger portion 2022 are insulated on the same layer and nested with each other. The number of the third interdigitated finger portions 2012 is greater than the number of the first interdigitated finger portions 1012. Similarly, the number of the fourth interdigitated finger portions 2022 may also be greater than the number of the second interdigitated finger portions 1022.

[0054] like Figures 6 to 8 As shown, in order to further improve the sensitivity of the first touch unit 10 and the second touch unit 20, a first protrusion 1013 can be provided on both sides of the first interdigitated finger portion 1012, and a second protrusion 1023 can be provided on both sides of the second interdigitated finger portion 1022, and the first protrusion 1013 and the second protrusion 1023 are arranged in the same layer and insulated and nested with each other; a third protrusion 2013 is provided on both sides of the third interdigitated finger portion 2012, and a fourth protrusion 2023 is provided on both sides of the fourth interdigitated finger portion 2022, and the third protrusion 2013 and the fourth protrusion 2023 are arranged in the same layer and insulated and nested with each other.

[0055] In any of the touch structures described above, two adjacent first touch electrode portions 101 form a first touch electrode unit 11, and two adjacent second touch electrode portions 102 form a second touch electrode unit 12. The first touch electrode portion 101 is half of the first touch electrode unit 11, and the second touch electrode portion 102 is half of the second touch electrode unit 12. Two adjacent first touch electrode units 11 in the first direction are electrically connected through a first connecting portion to form a plurality of first electrodes, and two adjacent second touch electrode units 12 in the second direction are electrically connected through a second connecting portion to form a plurality of second electrodes.

[0056] Two adjacent third touch electrode portions 201 form a third touch electrode unit 21, and two adjacent fourth touch electrode portions 202 form a fourth touch electrode unit 22. The third touch electrode portion 201 is half of the third touch electrode unit 21, and the fourth touch electrode portion 202 is half of the fourth touch electrode unit 22. Two adjacent third touch electrode units 21 in the first direction are electrically connected through a third connecting portion to form a plurality of third electrodes, and two adjacent fourth touch electrode units 22 in the second direction are electrically connected through a fourth connecting portion to form a plurality of fourth electrodes.

[0057] In an exemplary embodiment, the first touch electrode and the second touch electrode may be in a rhombus shape, for example, a regular rhombus, a horizontally long rhombus, or a vertically long rhombus. In some possible implementations, the first touch electrode and the second touch electrode may be in any one or more of a triangle, a square, a trapezoid, a parallelogram, a pentagon, a hexagon, and other polygons, which is not limited in the present disclosure.

[0058] The first touch electrode unit 11, the second touch electrode unit 12, the third touch electrode unit 21 and the fourth touch electrode unit 22 are all provided with a plurality of mesh holes for exposing sub-pixels. Each touch electrode unit can be made of a material with good electrical conductivity but poor light transmittance, such as metal, so that each touch electrode unit has a lower resistance, which is conducive to improving the touch effect.

[0059] The mesh may include a first mesh 111, a second mesh 121, and a third mesh 211, corresponding to a pixel unit including three sub-pixels, the first mesh 111 is used to expose the first sub-pixel, the second mesh 121 is used to expose the second sub-pixel, and the third mesh 211 is used to expose the third sub-pixel. The first sub-pixel may be a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel. The mesh may also include a fourth mesh 221, and the fourth mesh 221 is used to expose the fourth sub-pixel. The fourth sub-pixel may be a white sub-pixel.

[0060] The shape of each sub-pixel can be any one or more of a triangle, square, rectangle, rhombus, trapezoid, parallelogram, pentagon, hexagon and other polygons, and the arrangement can be parallel, square, cross or herringbone, etc., which is not limited in the present disclosure.

[0061] Taking the first touch area 1 as an example, on a plane perpendicular to the touch structure, the touch structure may include a stacked bridging layer, an insulating layer and a touch layer. In an exemplary embodiment, a plurality of first touch electrodes, a plurality of second touch electrodes and a plurality of first connecting portions may be arranged in the same layer on the touch layer, and may be formed by the same patterning process, and the first touch electrodes and the first connecting portions may be interconnected integral structures. The second connecting portion may be arranged in the bridging layer, and the adjacent second touch electrodes may be interconnected by vias, and an insulating layer may be arranged between the touch layer and the bridging layer. In an exemplary embodiment, the first touch electrode may be a driving electrode (Tx), and the second touch electrode may be a sensing electrode (Rx); or, the first touch electrode may be a sensing electrode (Rx), and the second touch electrode may be a driving electrode (Tx).

[0062] The first touch electrode and the second touch electrode can be in the form of a metal mesh, which is formed by interweaving a plurality of metal wires, and the metal mesh includes a plurality of mesh patterns, and the mesh pattern is a polygon formed by a plurality of metal wires. The first touch electrode and the second touch electrode are in the form of a metal mesh, which has the advantages of low resistance, thin thickness, fast response speed, lightness, thinness, and foldability.

[0063] In an exemplary embodiment, the area surrounded by the metal lines in a grid pattern includes the area of ​​the sub-pixels in the display panel, and the metal lines are located between adjacent sub-pixels. For example, when the display panel is an OLED display panel, the area of ​​the sub-pixels may be the light-emitting area defined by the pixel definition layer in the light-emitting layer, the area surrounded by the metal lines includes the light-emitting area, and the metal lines are located at the corresponding position of the pixel definition layer, that is, in the non-light-emitting area. The edges of the grid pattern may be straight lines or curves, which are not limited in the present disclosure.

[0064] Each first touch electrode is connected to the first pad electrode via a first transmission line, and each second touch electrode is connected to the second pad electrode via a second transmission line. In an exemplary embodiment, the first touch electrode can be connected to a driver of a touch display panel via the first pad electrode, and the second touch electrode can be connected to the driver via the second pad electrode. The driver can apply a drive signal to the second touch electrode and receive an output signal from the first touch electrode, thereby forming a stable capacitance between the first touch electrode and the second touch electrode. When a finger 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 a corresponding touch operation.

[0065] Through Figures 5 to 8 The simulation results shown in Table 1 can be obtained by simulating the touch parameters of the four different second touch units 20. Figure 5 are various touch parameters of the first second touch unit 20, Figure 6 are various touch parameters of the second touch unit 20 of the second type, Figure 7 are various touch parameters of the third second touch unit 20, Figure 8 These are the touch parameters of the fourth type of the second touch unit 20 .

[0066] Table 1 Simulation results of various touch parameters of different second touch units 20

[0067] Second touch unit The first The second The third The fourth Cm(PF) 1.108 1.260 1.282 1.245 Cm'(PF) 1.01 1.168 1.171 1.148 ΔCm(PF) 0.098 0.092 0.111 0.096 ΔCm / Cm 8.8％ 7.33％ 8.66％ 7.74％ Cptx(PF) 11.111 10.979 10.417 10.924 Cprx(PF) 10.706 10.840 10.413 10.790 Cftx(PF) 0.360 0.353 0.446 0.348 Cfrx(PF) 0.351 0.351 0.460 0.347 LGM 0.351 0.524 0.490 0.554 Rx 17.6 18.81 15.5 16.75 Rx 17.2 18.49 13.3 16.22

[0068] Wherein, Cm is the mutual capacitance value between the first touch electrode and the second touch electrode before touch occurs, Cm' is the mutual capacitance value between the first touch electrode and the second touch electrode after touch occurs, ΔCm is the change of the mutual capacitance value, Cftx is the capacitance value between the first touch electrode and the touched object, Cfrx is the capacitance value between the second touch electrode and the touched object, Cptx is the capacitance value of the parasitic capacitance between the first touch electrode and the electrode layer in the display substrate, Cprx is the capacitance value of the parasitic capacitance between the second touch electrode and the electrode layer in the display substrate, Rtx is the resistance of the first touch electrode, Rrx is the resistance of the second touch electrode, LGM is a weak grounding parameter (Low Ground Mass), and the weak grounding parameter LGM=ΔCm / Cftx+ΔCm / Cfrx. Weak grounding means that the display device and the human body do not have a common ground.

[0069] In the weak grounding state, the transmission (Rtransmission) effect is obvious, and the difficulty of transferring charge from the display device to the ground increases, resulting in a small change in the mutual capacitance value that can be collected by the touch detection module (TIC) in the display device, which makes it difficult for the touch detection module to accurately identify the touch. Therefore, the touch detection performance in the weak grounding state is poor. The current touch detection module can process weak grounding parameters in the range of 0.49 to 0.56. The weak grounding parameters are high, which is conducive to touch detection. The Cm, Cm' and ΔCm of each second touch unit 20 are in a relatively ideal state. The ΔCm of the four second touch units 20 are all high, so the sensitivity of the second touch unit 20 is high.

[0070] The embodiment of the present disclosure provides a touch display panel. The touch display panel includes a display substrate and a touch structure as described in any one of the embodiments of the present disclosure, and the touch structure is disposed on one side of the display substrate. The touch display panel can refer to the specific structure and beneficial effects of the touch structure, which have been described in detail above and will not be described in detail.

[0071] like Fig. 9As shown, the above touch display panel can be used in game products. The touch display panel is provided with a game operation area, and the second touch area 2 is provided in the game operation area to improve the sensitivity of the game operation position. Fig.10 As shown, the above touch display panel can also be used for a one-handed product. The touch display panel is provided with a one-handed operation area within the reach of one hand, and the second touch area 2 is provided in the one-handed operation area to improve the sensitivity within the reach of one hand. Fig.11 As shown, the above touch display panel can also be used for an opening product. The touch display panel is provided with an opening, and the shape of the opening includes but is not limited to a circle. The second touch area is provided around the opening to improve the sensitivity around the opening. Fig.12 As shown, the above touch display panel can also be used for products with curved edges. The edge of the touch display panel is a curved surface. The second touch area 2 is arranged at the edge of the touch display panel to improve the sensitivity of the edge and prevent accidental touches. Fig.13 As shown, the above touch display panel can also be used for folding products. The touch display panel is provided with a bending area, and the second touch area 2 is provided in the bending area. The touch function of the bending area is enhanced to increase the service life of the touch function of the folding product.

[0072] The embodiment of the present disclosure provides a touch display device. The touch display device includes the touch display panel described in any one of the above embodiments of the present disclosure. The touch display panel can also refer to the specific structure and beneficial effects of the touch structure.

[0073] The display device can be a traditional electronic device, such as a mobile phone, a computer, a television, and a camcorder, or it can be an emerging wearable device, such as a virtual reality device and an augmented reality device, which are not listed here one by one.

[0074] It should be noted that, in addition to the touch display panel, the display device also includes other necessary components and components, such as a housing, a circuit board, etc., taking a mobile phone as an example. Those skilled in the art can make corresponding supplements according to the specific usage requirements of the display device, which will not be repeated here.

[0075] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A touch structure, characterized in that: include: A first touch area; a second touch area, wherein the touch sensitivity of the second touch area is greater than the touch sensitivity of the first touch area; The first touch control area includes a plurality of first touch control units arranged in an array, the second touch control area includes a plurality of second touch control units arranged in an array, and the area of ​​the second touch control units is smaller than the area of ​​the first touch control units; The first touch unit includes a first touch electrode portion and a second touch electrode portion, the second touch unit includes a third touch electrode portion and a fourth touch electrode portion, a first boundary line is formed between the first touch electrode portion and the second touch electrode portion through a first interdigitated finger structure, a second boundary line is formed between the third touch electrode portion and the fourth touch electrode portion through a second interdigitated finger structure, and a length of the second boundary line is greater than a length of the first boundary line.

2. The touch control structure according to claim 1, characterized in that: The first touch control area includes a plurality of first touch control units arranged in an array, and the second touch control area includes a plurality of second touch control units arranged in an array. The touch sensitivity of the second touch control units is greater than the touch sensitivity of the first touch control units.

3. The touch control structure according to claim 1, characterized in that: The second touch area is arranged adjacent to the first touch area, the first touch unit includes an intersecting first side and a second side, the second touch unit includes an intersecting third side and a fourth side, the first side of adjacent first touch units is adjacent to the third side of at least two second touch units, or the second side of adjacent first touch units is adjacent to the fourth side of at least two second touch units.

4. The touch control structure according to claim 3, characterized in that: The first touch unit includes a first touch electrode portion and a second touch electrode portion, the first side is located in the first touch electrode portion, and the second side is located in the second touch electrode portion, the second touch unit includes a third touch electrode portion and a fourth touch electrode portion, the third side is located in the third touch electrode portion, and the fourth side is located in the fourth touch electrode portion, the first touch electrode portion is adjacent to at least two of the third touch electrode portions, or the second touch electrode portion is adjacent to at least two of the fourth touch electrode portions.

5. The touch control structure according to claim 1 or 2, characterized in that: The first interdigitated finger structure includes a first interdigitated finger portion provided on the first touch electrode portion and a second interdigitated finger portion provided on the second touch electrode portion, the first interdigitated finger portion and the second interdigitated finger portion are insulated on the same layer and are nested with each other, and the second interdigitated finger structure includes a third interdigitated finger portion provided on the third touch electrode portion and a fourth interdigitated finger portion provided on the fourth touch electrode portion, the third interdigitated finger portion and the fourth interdigitated finger portion are insulated on the same layer and are nested with each other, and the number of the third interdigitated finger portions is greater than the number of the first interdigitated finger portions.

6. The touch control structure according to claim 5, characterized in that: A first protrusion is provided on both sides of the first interdigitated finger portion, and a second protrusion is provided on both sides of the second interdigitated finger portion. The first protrusion and the second protrusion are insulated and arranged in the same layer and nested with each other; a third protrusion is provided on both sides of the third interdigitated finger portion, and a fourth protrusion is provided on both sides of the fourth interdigitated finger portion. The third protrusion and the fourth protrusion are insulated and arranged in the same layer and nested with each other.

7. The touch control structure according to claim 1 or 2, characterized in that: Two adjacent first touch electrode portions form a first touch electrode unit, two adjacent second touch electrode portions form a second touch electrode unit, two adjacent third touch electrode portions form a third touch electrode unit, and two adjacent fourth touch electrode portions form a fourth touch electrode unit. The first touch electrode unit, the second touch electrode unit, the third touch electrode unit and the fourth touch electrode unit are all provided with a plurality of mesh holes for exposing sub-pixels.

8. A touch display panel, characterized in that: include: Display substrate; The touch structure according to any one of claims 1 to 7, wherein the touch structure is arranged on one side of the display substrate.

9. The touch display panel according to claim 8, characterized in that: The touch display panel is provided with a game operation area, and the second touch area is provided in the game operation area.

10. The touch display panel according to claim 8, characterized in that: The touch display panel is provided with a one-hand operation area located within the reach of one hand, and the second touch area is provided in the one-hand operation area.

11. The touch display panel according to claim 8, characterized in that: The touch display panel is provided with an opening, and the second touch area is provided around the opening.

12. The touch display panel according to claim 8, characterized in that: The edge of the touch display panel is a curved surface, and the second touch area is arranged at the edge of the touch display panel.

13. The touch display panel according to claim 8, characterized in that: The touch display panel is provided with a bending area, and the second touch area is provided in the bending area.

14. A touch display device, characterized in that: It comprises a touch display panel according to any one of claims 8 to 13.

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