Touch panel and display device

Abstract

The invention provides a touch panel and a display device.The touch panel comprises a substrate and a plurality of touch units arranged on one side of the substrate in an array mode, and each touch unit comprises a first touch electrode, a second touch electrode and a third touch electrode, the second touch electrodes extend in the second direction, and the second direction intersects with the first direction; the virtual electrodes are located between the adjacent first touch electrodes and second touch electrodes, and the virtual electrodes are used for separating the first touch electrodes from the second touch electrodes. According to the touch panel, the self-capacitance semaphore of touch control can be improved, the touch control performance is improved, and the situation that touch control is not sensitive in a pure self-capacitance scanning mode is reduced.

Description

Technical Field

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

[0002] With the development of display technologies, more and more display panels are integrated with touch functions. As a new mobile phone unlocking method, the under-screen fingerprint recognition technology has gradually become the market mainstream, which is mainly divided into optical under-screen fingerprint recognition and ultrasonic under-screen fingerprint recognition. Since users do not perform fingerprint unlocking operations all the time, to save power consumption, the fingerprint recognition chip is in a sleep state most of the time and only wakes up to start working when fingerprint recognition is required by the terminal.

[0003] However, the current touch panel is prone to insensitive touch, resulting in a low probability of successful fingerprint unlocking function and affecting the user experience. Summary of the Invention

[0004] In view of this, the purpose of the present application is to provide a touch panel and a display device, which helps to increase the self-capacitance induction amount of touch and improve the touch performance.

[0005] Based on the above purpose, the present application provides a touch panel, which includes a substrate and a plurality of touch units arranged in an array on one side of the substrate. The touch unit includes:

[0006] A first touch electrode extending along a first direction;

[0007] A second touch electrode extending along a second direction, and the second direction intersects with the first direction;

[0008] A virtual electrode located between adjacent first touch electrodes and second touch electrodes, and the first touch electrode and the second touch electrode are separated from each other by the virtual electrode.

[0009] Optionally, the first direction is perpendicular to the second direction, and the orthographic projection of the touch unit on the substrate is rectangular;

[0010] Preferably, the ratio between the size of the touch unit along the first direction and the size of the touch unit along the second direction is greater than or equal to 0.95 and less than or equal to 1.05;

[0011] Preferably, the size of the touch unit along the first direction is equal to the size of the touch unit along the second direction.

[0012] Optionally, within the same touch unit, two first touch electrodes are symmetrically arranged along the first direction, and the two first touch electrodes are connected by a first electrode connection part;

[0013] The two second touch electrodes are symmetrically arranged along the second direction, and are connected by a second electrode connecting portion between the two second touch electrodes;

[0014] Preferably, the first electrode connecting portion and the second electrode connecting portion intersect in spatial position and are located in different metal layers;

[0015] Preferably, the first electrode connecting portion or the second electrode connecting portion includes a plurality of parallel metal lines;

[0016] Preferably, the first electrode connecting portion or the second electrode connecting portion includes four parallel metal lines.

[0017] Optionally, the second touch electrode includes a second electrode top section, a second electrode middle section, and a second electrode bottom section, and the second electrode top section, the second electrode middle section, and the second electrode bottom section are sequentially connected along a direction away from the geometric center of the touch unit along the second direction;

[0018] Second electrode shoulders are respectively arranged on two sides of the second electrode middle section along the first direction, and the second electrode shoulders extend along the first direction;

[0019] Preferably, at least two groups of the second electrode shoulders are connected to the second electrode middle section and are arranged at intervals along the second direction;

[0020] Preferably, the ratio of the size of the second electrode middle section along the first direction to the size of the touch unit along the first direction is greater than or equal to 0.3 and less than or equal to 0.5;

[0021] Preferably, the ratio of the size of the second electrode shoulder along the first direction to the size of the touch unit along the first direction is greater than or equal to 0.18 and less than or equal to 0.21;

[0022] Preferably, the sizes of the second electrode top section, the second electrode middle section, and the second electrode bottom section along the first direction increase in sequence;

[0023] Preferably, within the same touch unit, the orthographic projection area of the first touch electrode on the substrate is greater than or equal to 40% and less than or equal to 50% of the orthographic projection area of the touch unit on the substrate;

[0024] Preferably, within the same touch unit, the orthographic projection area of the second touch electrode on the substrate is greater than or equal to 40% and less than or equal to 50% of the orthographic projection area of the touch unit on the substrate;

[0025] Preferably, within the same touch unit, the orthographic projection area of the virtual electrode on the substrate is greater than or equal to 8% and less than or equal to 20% of the orthographic projection area of the touch unit on the substrate.

[0026] Optionally, the first touch electrode includes a first electrode top section, a first electrode middle section, and a first electrode bottom section, which are sequentially connected in a direction away from the geometric center of the touch unit along the first direction;

[0027] On both sides of the first electrode middle section along the second direction, first electrode protrusions are respectively arranged, the first electrode protrusions extend along the first direction, and the first electrode protrusions are engaged with the second electrode shoulders;

[0028] Preferably, at least two groups of the first electrode protrusions arranged at intervals along the second direction are connected to the first electrode bottom section;

[0029] Preferably, the ratio of the size of the first electrode middle section along the second direction to the size of the touch unit along the second direction is greater than or equal to 0.2 and less than or equal to 0.4;

[0030] Preferably, the maximum size of the first electrode top section along the second direction is less than or equal to the size of the first electrode middle section along the second direction, and the size of the first electrode bottom section along the first direction is greater than the size of the first electrode middle section along the second direction.

[0031] Optionally, the second touch electrode includes a second electrode main peak section and a second electrode slope section, which are sequentially connected in a direction away from the geometric center of the touch unit along the second direction;

[0032] Preferably, along the direction away from the geometric center of the touch unit, the size of the second electrode main peak section along the first direction gradually increases;

[0033] Preferably, along the direction away from the geometric center of the touch unit, the size of the second electrode slope section along the first direction gradually increases;

[0034] Preferably, the ratio of the maximum size of the second electrode main peak section along the first direction to the size of the touch unit along the first direction is greater than or equal to 0.3 and less than or equal to 0.5;

[0035] Preferably, the minimum dimension of the second electrode ramp portion in the first direction is greater than the maximum dimension of the second electrode main peak portion in the first direction;

[0036] Preferably, a second electrode side peak portion is formed at the connection between the second electrode ramp portion and the second electrode main peak portion, and two such second electrode side peak portions are symmetrically arranged on both sides of the second electrode main peak portion;

[0037] Preferably, the boundary of the second touch electrode includes a first hypotenuse located at the second electrode main peak portion and a second hypotenuse located at the second electrode ramp portion; the ratio of the length of the first hypotenuse to the dimension of the touch unit in the first direction is greater than or equal to 0.2 and less than or equal to 0.3; the ratio of the length of the second hypotenuse to the dimension of the touch unit in the first direction is greater than or equal to 0.2 and less than or equal to 0.3;

[0038] Preferably, the boundary of the second touch electrode further includes a third hypotenuse connecting the first hypotenuse and the second hypotenuse, and the third hypotenuse is located at the second electrode side peak portion; the ratio of the length of the third hypotenuse to the dimension of the touch unit in the first direction is greater than or equal to 0.05 and less than or equal to 0.1;

[0039] Preferably, the angle between the first hypotenuse and the first direction is greater than or equal to 50 degrees and less than or equal to 60 degrees; the angle between the second hypotenuse and the first direction is greater than or equal to 55 degrees and less than or equal to 65 degrees;

[0040] Preferably, the first hypotenuse and the second hypotenuse have the same inclination direction, and the third hypotenuse has an inclination direction opposite to that of the first hypotenuse and the second hypotenuse;

[0041] Preferably, at least part of the boundary of the first touch electrode has the same shape as the boundary of the second touch electrode, so that the first touch electrode and the second touch electrode are mutually embedded within the same touch unit;

[0042] Preferably, within the same touch unit, the orthographic projection area of the first touch electrode on the substrate is greater than or equal to 35% and less than or equal to 45% of the orthographic projection area of the touch unit on the substrate;

[0043] Preferably, within the same touch unit, the orthographic projection area of the second touch electrode on the substrate is greater than or equal to 35% and less than or equal to 45% of the orthographic projection area of the touch unit on the substrate;

[0044] Preferably, within the same touch unit, the orthographic projection area of the virtual electrode on the substrate is greater than or equal to 8% of the orthographic projection area of the touch unit on the substrate and less than or equal to 15% of the orthographic projection area of the touch unit on the substrate.

[0045] Optionally, the boundary of the first touch electrode includes a first serrated portion, and the boundary of the second touch electrode includes a second serrated portion;

[0046] Preferably, the first serrated portion is disposed on the top section, shoulder section, middle section, and bottom section of the second electrode;

[0047] Preferably, the second serrated portion has the same shape as the first serrated portion;

[0048] Preferably, the virtual electrode includes a third serrated portion, and the third serrated portion is located between the first serrated portion and the second serrated portion.

[0049] Optionally, the virtual electrode includes a first virtual portion disposed in the corner region of the touch unit;

[0050] Preferably, the first virtual portion is provided in all four corner regions of the touch unit;

[0051] Preferably, the ratio of the dimension of the first virtual portion in the first direction to the dimension of the touch unit in the first direction is greater than or equal to 0.08 and less than or equal to 0.2;

[0052] Preferably, the ratio of the dimension of the first virtual portion in the second direction to the dimension of the touch unit in the second direction is greater than or equal to 0.02 and less than or equal to 0.1.

[0053] Optionally, an isolation gap is formed between the boundary of the first touch electrode and the boundary of the second touch electrode, and the virtual electrode includes a second virtual portion disposed in the isolation gap;

[0054] Preferably, the second virtual portion partially fills the isolation gap;

[0055] Preferably, the second virtual portion is spaced apart from the first electrode connection portion and the second electrode connection portion respectively.

[0056] Based on the same inventive concept, the present application also provides a display device, which includes the touch panel described in any one of the above.

[0057] Compared with the related technologies, the touch panel provided by the present application can improve the self-capacitance signal amount of touch, improve the touch performance, and reduce the touch insensitivity in the pure self-capacitance scanning mode by setting the first touch electrode, the second touch electrode, and the virtual electrode. Description of the Drawings

[0058] In order to more clearly illustrate the technical solutions in the present application or related technologies, the following will briefly introduce the drawings required for use in the embodiments or related technology descriptions. Obviously, the drawings in the following descriptions are only the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0059] Figure 1 It is a schematic structural diagram of a touch panel provided by a related technology;

[0060] Figure 2 It is a schematic cross-sectional structure diagram of the touch panel in the first embodiment of the present application;

[0061] Figure 3 It is a schematic structural diagram of the touch unit in the first embodiment of the present application;

[0062] Figure 4 It is a schematic structural diagram of the touch unit in the first embodiment of the present application;

[0063] Figure 5 For Figure 4 The partial enlarged schematic diagram at position B in;

[0064] Figure 6 It is a schematic structural diagram of the second touch electrode in the first embodiment of the present application;

[0065] Figure 7 It is a schematic structural diagram of the first touch electrode in the first embodiment of the present application;

[0066] Figure 8 It is a schematic structural diagram of the virtual electrode in the first embodiment of the present application;

[0067] Figure 9 It is a schematic structural diagram of the touch unit in the second embodiment of the present application;

[0068] Figure 10 It is a schematic structural diagram of the second touch electrode in the first embodiment of the present application;

[0069] Figure 11 It is a schematic structural diagram of the virtual electrode in the first embodiment of the present application;

[0070] Figure 12 It is a schematic structural diagram of the touch unit in the third embodiment of the present application.

[0071] Marking Description:

[0072] 100, touch panel; 101, touch unit; 102, substrate;

[0073] 1. first touch electrode; 11. first electrode connecting portion; 12. first electrode top section; 13. first electrode middle section; 14. first electrode bottom section; 15. first electrode protrusion;

[0074] 2. second touch electrode; 21. second electrode connecting portion; 22. second electrode top section; 23. second electrode middle section; 24. second electrode bottom section; 25. second electrode shoulder; 26. second electrode main peak; 27. second electrode slope; 28. second electrode side peak; 201. first oblique edge; 202. second oblique edge; 203. third oblique edge;

[0075] 3. Virtual electrode; 31. First virtual portion; 32. Second virtual portion. DETAILED DESCRIPTION

[0076] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0077] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0078] In scenarios with low touch accuracy requirements (such as AOD interfaces), the touch panel can select pure self-capacitance scanning mode to save power. However, if the self-capacitance of the touch sensor is low, it is easy to experience touch unresponsiveness and disconnection in pure self-capacitance scanning mode. For example, if the touch is not sensitive on the AOD interface, the fingerprint unlocking function may fail probabilistically, affecting the user experience.

[0079] like Figure 1As shown, in the related art, the touch panel 100 includes a first touch electrode 1 and a second touch electrode 2. The first touch electrode 1 is a driving electrode (also known as a transmitting electrode, TX), and the second touch electrode 2 is a sensing electrode (also known as a receiving electrode, RX). The first touch electrode 1 and the second touch electrode 2 respectively include metal grids formed by touch conductive grid lines, and the metal grid forming the first touch electrode 1 is insulated from the metal grid forming the second touch electrode 2. Among them, the touch panel 100 may include a touch pattern composed of a plurality of identical touch units 101.

[0080] After research by the inventors of this application, it is found that in the off-screen and unlocking interfaces of mobile terminals, in order to save touch power consumption, a touch self-capacitance scanning mode is adopted. That is, when a finger presses the fingerprint recognition area of the locked mobile terminal, the touch chip (IC) only starts self-capacitance scanning to save power. When the self-capacitance induction amount reaches the preset threshold of the touch chip, the touch chip transmits the information that there is a finger touch to the mobile terminal, and then the mobile terminal wakes up the fingerprint chip to perform fingerprint recognition and other actions; when the self-capacitance induction amount fails to reach the preset threshold of the touch chip, the touch chip has no response, the mobile terminal has no action, and continues to maintain the locked state, and the unlocking fails. To sum up, in the self-capacitance scanning mode, if the self-capacitance induction amount is low, the phenomenon of no response to touch is likely to occur probabilistically, resulting in the probabilistic failure of the fingerprint unlocking function. In some related technologies, by increasing the area of the driving electrode and the sensing electrode, the capacitance to the finger is increased to increase the self-capacitance induction amount, but this method will cause too much increase in the capacitance of the touch pattern to the cathode, affecting the touch reporting rate and touch performance.

[0081] Based on this, this application provides a solution for a touch panel to solve the above problems.

[0082] As Figures 2 to 8 As shown, the first embodiment of this application provides a touch panel 100. The touch panel 100 includes a substrate 102 and a plurality of touch units 101 arranged in an array on one side of the substrate 102. The touch unit 101 includes a first touch electrode 1, a second touch electrode 2, and a virtual electrode 3. The first touch electrode 1 extends along a first direction (the X direction in the figure), the second touch electrode 2 extends along a second direction (the Y direction in the figure), and the second direction intersects the first direction. The virtual electrode 3 is located between adjacent first touch electrodes 1 and second touch electrodes 2, and the virtual electrode 3 is used to separate the first touch electrode 1 and the second touch electrode 2 to form electrical insulation.

[0083] Specifically, the touch unit 101 includes a first touch electrode 1, a second touch electrode 2, and a virtual (Dummy) electrode that are insulated from each other. The virtual electrode is a non-functional electrode, and there is a gap between any two of the first touch electrode 1, the second touch electrode 2, and the virtual electrode 3 that insulates them from each other. The first touch electrode 1 is one of the driving electrode and the sensing electrode, and the second touch electrode 2 is the other of the driving electrode and the sensing electrode.

[0084] In this embodiment, a virtual electrode 3 is provided between the first touch electrode 1 and the second touch electrode 2, which can reduce the capacitance of the driving electrode and the sensing electrode to the cathode, and avoid the unqualified touch reporting rate and touch performance caused by excessive capacitance.

[0085] It should be noted that the embodiments of the present application mainly describe the structures of the first touch electrode 1 and the second touch electrode 2 located in the same touch unit 101.

[0086] Through the analysis of the touch capacitance model, when a finger touches, the incremental capacitance formed by the touch unit 101 and the finger is Cfinger; at the same time, the capacitance corresponding to the finger touch channel is Cp, the coupling capacitance is Cm, and the capacitance of the adjacent touch channel is Ctrx. These capacitances will decrease correspondingly due to the finger touch. Here, the decreased values of each capacitance are defined as △Cp, △Cm, and △Ctrx respectively. The final self-capacitance induction amount △C = Cfinger - △Cp - △Cm - △Ctrx. In order not to increase Cp and Cfinger too much, through a certain graphic design in the embodiments of the present application, the values of △Cp, △Cm, and △Ctrx can be reduced, which can effectively improve the self-capacitance induction amount and will not cause an increase in Cp, avoiding negative impacts on the basic touch performance.

[0087] As Figure 3 、 Figure 4 shown, the first direction is perpendicular to the second direction, and the shape of the orthographic projection of the touch unit 101 on the substrate 102 is a rectangle. Among them, the rectangle includes a square.

[0088] Optionally, the ratio of the size a of the touch unit 101 in the first direction to the size b of the touch unit 101 in the second direction is greater than or equal to 0.95 and less than or equal to 1.05, so that the touch linearity of the touch panel 100 formed by the above touch unit 101 is basically the same in the first direction and the second direction, thereby ensuring that different position areas of the touch panel have basically the same touch sensitivity.

[0089] For example, the ratio of the size a of the touch unit 101 in the first direction to the size b of the touch unit 101 in the second direction can be 0.95, 1, 1.05, etc.

[0090] Optionally, the size a of the touch unit 101 in the first direction is equal to the size b of the touch unit 101 in the second direction. That is, the shape of the orthographic projection of the touch unit 101 on the substrate 102 is a square.

[0091] As Figure 4 , Figure 5 shown, within the same touch unit 101, two first touch electrodes 1 are symmetrically arranged in the first direction, and are connected by a first electrode connection portion 11 between the two first touch electrodes 1. Two second touch electrodes 2 are symmetrically arranged in the second direction, and are connected by a second electrode connection portion 21 between the two second touch electrodes 2.

[0092] Optionally, the first electrode connection portion 11 and the second electrode connection portion 21 intersect in spatial position and are located in different metal layers, enabling electrical insulation.

[0093] Optionally, the first electrode connection portion 11 or the second electrode connection portion 21 includes multiple parallel metal lines. For example, the first electrode connection portion 11 or the second electrode connection portion 21 includes four parallel metal lines. Connecting two adjacent first touch electrodes 1 or two adjacent second touch electrodes 2 with multiple parallel metal lines can reduce the bridging impedance.

[0094] In the touch panel 100 provided in the first embodiment of the present application, as Figure 6 shown, the second touch electrode 2 includes a second electrode top section 22, a second electrode middle section 23, and a second electrode bottom section 24. The second electrode connection portion 21, the second electrode top section 22, the second electrode middle section 23, and the second electrode bottom section 24 are sequentially connected in a direction away from the geometric center A of the touch unit 101 in the second direction. Second electrode shoulders 25 are respectively provided on both sides of the second electrode middle section 23 in the first direction, and the second electrode shoulders 25 extend in the first direction. Among them, the second touch electrode 2 is integrally in a convex shape with shoulders, which can ensure sufficient induction of the second touch electrode 2.

[0095] Optionally, at least two groups of second electrode shoulders 25 arranged at intervals in the second direction are connected to the second electrode middle section 23.

[0096] Optionally, the ratio of the size d of the second electrode middle section 23 in the first direction to the size a of the touch unit 101 in the first direction is greater than or equal to 0.3 and less than or equal to 0.5. For example, the ratio of the size d of the second electrode middle section 23 in the first direction to the size a of the touch unit 101 in the first direction can be 0.3, 0.4, 0.5, etc.

[0097] Optionally, the ratio of the dimension e of the second electrode shoulder 25 in the first direction to the dimension a of the touch unit 101 in the first direction is greater than or equal to 0.18 and less than or equal to 0.21. For example, the ratio of the dimension e of the second electrode shoulder 25 in the first direction to the dimension a of the touch unit 101 in the first direction can be 0.18, 0.19, 0.2, 0.21, etc.

[0098] Specifically, the dimensions of the second electrode top section 22, the second electrode middle section 23, and the second electrode bottom section 24 in the first direction increase in sequence.

[0099] Optionally, within the same touch unit 101, the orthographic projection area of the first touch electrode 1 on the substrate 102 is greater than or equal to 40% and less than or equal to 50% of the orthographic projection area of the touch unit 101 on the substrate 102. For example, the area occupied by the first touch electrode 1 is 40%, 42%, 45%, 47%, 50%, etc. of the area occupied by the touch unit 101.

[0100] Optionally, within the same touch unit 101, the orthographic projection area of the second touch electrode 2 on the substrate 102 is greater than or equal to 40% and less than or equal to 50% of the orthographic projection area of the touch unit 101 on the substrate 102. For example, the area occupied by the second touch electrode 2 is 40%, 42%, 45%, 47%, 50%, etc. of the area occupied by the touch unit 101.

[0101] Optionally, within the same touch unit 101, the orthographic projection area of the virtual electrode 3 on the substrate 102 is greater than or equal to 8% and less than or equal to 20% of the orthographic projection area of the touch unit 101 on the substrate 102. For example, the area occupied by the virtual electrode 3 is 8%, 10%, 14%, 17%, 20%, etc. of the area occupied by the touch unit 101.

[0102] In the touch panel 100 provided in the first embodiment of the present application, as Figure 7 shown, the first touch electrode 1 includes a first electrode top section 12, a first electrode middle section 13, and a first electrode bottom section 14. The first electrode connection part 11, the first electrode top section 12, the first electrode middle section 13, and the first electrode bottom section 14 are connected in sequence in the direction away from the geometric center A of the touch unit 101 in the first direction. First electrode protrusions 15 are respectively arranged on both sides of the first electrode middle section 13 in the second direction. The first electrode protrusions 15 extend in the first direction, and the first electrode protrusions 15 are arranged in an interlocking manner with the second electrode shoulders 25, that is, the boundaries where the first touch electrode 1 is adjacent to the second touch electrode 2 are in concave-convex fit.

[0103] Optionally, at least two sets of first electrode protrusions 15 arranged at intervals in the second direction are connected to the bottom section 14 of the first electrode.

[0104] Optionally, the ratio of the size of the middle section 13 of the first electrode in the second direction f to the size a of the touch control unit 101 in the second direction is greater than or equal to 0.2 and less than or equal to 0.4. For example, the ratio of the size of the middle section 13 of the first electrode in the second direction f to the size a of the touch control unit 101 in the second direction can be 0.2, 0.3, 0.4, etc. In this way, the area of the first touch electrode 1 can be ensured, and thus the induction amount of the first touch electrode 1 can be guaranteed to be sufficient.

[0105] Optionally, the maximum size of the top section 12 of the first electrode in the second direction is less than or equal to the size of the middle section 13 of the first electrode in the second direction, and the size of the bottom section 14 of the first electrode in the first direction is greater than the size of the middle section 13 of the first electrode in the second direction, and the first touch electrode 1 is also in a convex shape.

[0106] In the touch panel 100 provided in the first embodiment of the present application, as Figure 4 , Figure 8 shown, the virtual electrode 3 includes a first virtual part 31 disposed in the corner area of the touch control unit 101.

[0107] Optionally, the first virtual part 31 is disposed in all four corner areas of the touch control unit 101.

[0108] Optionally, the ratio of the size h of the first virtual part 31 in the first direction to the size a of the touch control unit 101 in the first direction is greater than or equal to 0.08 and less than or equal to 0.2. For example, the ratio of the size h of the first virtual part 31 in the first direction to the size a of the touch control unit 101 in the first direction can be 0.08, 0.1, 0.15, 0.2, etc.

[0109] Optionally, the ratio of the size g of the first virtual part 31 in the second direction to the size b of the touch control unit 101 in the second direction is greater than or equal to 0.02 and less than or equal to 0.1. For example, the ratio of the size g of the first virtual part 31 in the second direction to the size b of the touch control unit 101 in the second direction can be 0.02, 0.04, 0.06, 0.08, 0.1, etc. The size design of the virtual electrode 3 can ensure that the parasitic capacitance between adjacent first touch electrodes 1 and second touch electrodes 2 is small, so as to reduce △Ctrx.

[0110] In the touch panel 100 provided in the first embodiment of the present application, as Figure 4 , Figure 8As shown, an isolation gap is formed between the boundary of the first touch electrode 1 and the boundary of the second touch electrode 2, and the virtual electrode 3 includes a second virtual portion 32 disposed in the isolation gap.

[0111] Optionally, the second virtual portion 32 partially fills the isolation gap. Specifically, most of the isolation gap between the boundary of the first touch electrode 1 and the boundary of the second touch electrode 2 is filled with the virtual electrode 3, which can reduce △Cm.

[0112] Optionally, the second virtual portion 32 is spaced apart from the first electrode connection portion 11 and the second electrode connection portion 21 respectively to achieve electrical insulation.

[0113] As Figure 9 、 Figure 10 shown, in the touch panel 100 provided in the second embodiment of the present application, different from the above first embodiment, the second touch electrode 2 includes a second electrode main peak portion 26 and a second electrode ramp portion 27, and the second electrode connection portion 21, the second electrode main peak portion 26 and the second electrode ramp portion 27 are sequentially connected along the direction away from the geometric center of the touch unit 101 in the second direction. Among them, the second touch electrode 2 is mountain-shaped, and its contour is similar to a triangle.

[0114] Optionally, along the direction away from the geometric center A of the touch unit 101, the size of the second electrode main peak portion 26 in the first direction gradually increases.

[0115] Optionally, along the direction away from the geometric center A of the touch unit 101, the size of the second electrode ramp portion 27 in the first direction gradually increases.

[0116] Optionally, the ratio of the maximum size i of the second electrode main peak portion 26 in the first direction to the size a of the touch unit 101 in the first direction is greater than or equal to 0.3 and less than or equal to 0.5. For example, the ratio of the maximum size i of the second electrode main peak portion 26 in the first direction to the size a of the touch unit 101 in the first direction can be 0.3, 0.4, 0.5, etc.

[0117] Optionally, the minimum size of the second electrode ramp portion 27 in the first direction is greater than the maximum size of the second electrode main peak portion 26 in the first direction.

[0118] Optionally, a second electrode side peak portion 28 is formed at the connection of the second electrode ramp portion 27 and the second electrode main peak portion 26, and two second electrode side peak portions 28 are symmetrically arranged on both sides of the second electrode main peak portion 26.

[0119] Optionally, the boundary of the second touch electrode 2 includes a first hypotenuse 201 located at the second electrode main peak portion 26 and a second hypotenuse 202 located at the second electrode ramp portion 27.

[0120] Wherein, the ratio of the length j of the first hypotenuse 201 to the dimension a of the touch unit 101 in the first direction is greater than or equal to 0.2 and less than or equal to 0.3. For example, the ratio of the length j of the first hypotenuse 201 to the dimension a of the touch unit 101 in the first direction can be 0.2, 0.25, 0.3, etc.

[0121] Wherein, the ratio of the length k of the second hypotenuse 202 to the dimension a of the touch unit 101 in the first direction is greater than or equal to 0.2 and less than or equal to 0.3. For example, the ratio of the length k of the second hypotenuse 202 to the dimension a of the touch unit 101 in the first direction can be 0.2, 0.25, 0.3, etc.

[0122] Optionally, the boundary of the second touch electrode 2 further includes a third hypotenuse 203 connecting the first hypotenuse 201 and the second hypotenuse 202. The third hypotenuse 203 is located at the second electrode side peak 28. The ratio of the length n of the third hypotenuse 203 to the dimension of the touch unit 101 in the first direction a is greater than or equal to 0.05 and less than or equal to 0.1. For example, the ratio of the length n of the third hypotenuse 203 to the dimension of the touch unit 101 in the first direction a can be 0.05, 0.07, 0.1, etc.

[0123] Optionally, the angle q between the first hypotenuse 201 and the first direction 1 is greater than or equal to 50 degrees and less than or equal to 60 degrees. For example, the angle q between the first hypotenuse 201 and the first direction 1 can be 50 degrees, 55 degrees, 60 degrees, etc.

[0124] The angle q between the second hypotenuse 202 and the first direction 2 is greater than or equal to 55 degrees and less than or equal to 65 degrees. For example, the angle q between the second hypotenuse 202 and the first direction 2 can be 55 degrees, 60 degrees, 65 degrees, etc.

[0125] Optionally, the first hypotenuse 201 and the second hypotenuse 202 have the same inclination direction, and the third hypotenuse 203 has an inclination direction opposite to that of the first hypotenuse 201 and the second hypotenuse 202. The third hypotenuse 203 and a part of the second hypotenuse 202 form the second electrode side peak 28.

[0126] Optionally, at least part of the boundary of the first touch electrode 1 has the same shape as the boundary of the second touch electrode 2, so that the first touch electrode 1 and the second touch electrode 2 are mutually embedded within the same touch unit 101.

[0127] Optionally, within the same touch unit 101, the orthographic projection area of the first touch electrode 1 on the substrate 102 is greater than or equal to 45% and less than or equal to 55% of the orthographic projection area of the touch unit 101 on the substrate 102. For example, the area occupied by the first touch electrode 1 is 45%, 47%, 50%, 53%, 55%, etc. of the area occupied by the touch unit 101.

[0128] Optionally, within the same touch unit 101, the orthographic projection area of the second touch electrode 2 on the substrate 102 is greater than or equal to 35% and less than or equal to 45% of the orthographic projection area of the touch unit 101 on the substrate 102. For example, the area occupied by the second touch electrode 2 is 35%, 37%, 40%, 43%, 45%, etc. of the area occupied by the touch unit 101.

[0129] Optionally, within the same touch unit 101, the orthographic projection area of the virtual electrode 3 on the substrate 102 is greater than or equal to 8% and less than or equal to 15% of the orthographic projection area of the touch unit 101 on the substrate 102. For example, the area occupied by the virtual electrode 3 is 8%, 10%, 12%, 13%, 15%, etc. of the area occupied by the touch unit 101.

[0130] In this embodiment, by adjusting the area ratios of the first touch electrode 1 and the second touch electrode 2, as well as the area ratio of the virtual electrode 3, the self-capacitance induction amounts of the first touch electrode 1 and the second touch electrode 2 can be adjusted, avoiding the problems of unqualified touch reporting rates and unqualified touch performance caused by too high Cp.

[0131] In the touch panel 100 provided in the second embodiment of the present application, as Figure 9 、 Figure 11 shown, the virtual electrode 3 includes a first virtual part 31 disposed in the corner area of the touch unit 101.

[0132] Optionally, the first virtual part 31 is provided in all four corner areas of the touch unit 101.

[0133] Optionally, the ratio of the dimension h of the first virtual part 31 in the first direction to the dimension a of the touch unit 101 in the first direction is greater than or equal to 0.08 and less than or equal to 0.2. For example, the ratio of the dimension h of the first virtual part 31 in the first direction to the dimension a of the touch unit 101 in the first direction can be 0.08, 0.1, 0.15, 0.2, etc.

[0134] Optionally, the ratio of the dimension g of the first virtual part 31 in the second direction to the dimension b of the touch control unit 101 in the second direction is greater than or equal to 0.02 and less than or equal to 0.1. For example, the ratio of the dimension g of the first virtual part 31 in the second direction to the dimension b of the touch control unit 101 in the second direction can be 0.02, 0.04, 0.06, 0.08, 0.1, etc. The dimension design of the virtual electrode 3 can ensure that the parasitic capacitance between adjacent first touch electrodes 1 and second touch electrodes 2 is small, so as to reduce △Ctrx.

[0135] In the touch panel 100 provided in the second embodiment of the present application, as Figure 9 , Figure 11 shown, an isolation gap is formed between the boundary of the first touch electrode 1 and the boundary of the second touch electrode 2, and the virtual electrode 3 includes a second virtual part 32 disposed in the isolation gap. The second virtual part 32 may have a serrated shape. At the same time, the boundaries of the first touch electrode 1 and the second touch electrode 2 also have the same serrated shape.

[0136] Optionally, the second virtual part 32 partially fills the isolation gap. Specifically, most of the isolation gap between the boundary of the first touch electrode 1 and the boundary of the second touch electrode 2 is filled with the virtual electrode 3, which can reduce △Cm.

[0137] Optionally, the second virtual part 32 is spaced apart from the first electrode connection part 11 and the second electrode connection part 21 respectively to achieve electrical insulation.

[0138] As Figure 12 shown, in the touch panel 100 provided in the third embodiment of the present application, different from the above first embodiment, the boundary of the first touch electrode 1 includes a first serrated part, and the boundary of the second touch electrode 2 includes a second serrated part.

[0139] Optionally, the first serrated part is disposed on the second electrode top segment 22, the second electrode shoulder 25, the second electrode middle segment 23, and the second electrode bottom segment 24.

[0140] Optionally, the second serrated part has the same shape as the first serrated part.

[0141] Optionally, the virtual electrode 3 includes a third serrated part, and the third serrated part is located between the first serrated part and the second serrated part.

[0142] Taking the diamond structure of the first touch electrode 1 and the second touch electrode 2 in the related art as a comparative example, after implementing the first embodiment and the second embodiment of the present application respectively, simulation data and measured data on the self-capacitance induction amounts of the first touch electrode 1 and the second touch electrode 2 are obtained, as follows. Among them, the first touch electrode 1 uses a transmitting electrode (TX), and the second touch electrode 2 uses a receiving electrode (RX).

[0143] Simulation data: The self-capacitance induction of the first touch electrode 1 in the comparative example is 260, and the self-capacitance induction of the second touch electrode 2 is 410. After the implementation of the first embodiment, the self-capacitance induction of the first touch electrode 1 is increased to 293, and the improvement ratio compared with the comparative example reaches 12.6%. The self-capacitance induction of the second touch electrode 2 is increased to 465, and the improvement ratio is 13.4%. The second embodiment increases the self-capacitance induction of the first touch electrode 1 significantly to 329, with an improvement ratio as high as 26.5%, and the self-capacitance induction of the second touch electrode 2 is increased to 452, with an improvement ratio of 10.2%. This shows that both solutions can effectively improve the self-capacitance induction in the simulation environment, and the improvement effect of the second embodiment on the self-capacitance induction of the first touch electrode 1 is particularly prominent.

[0144] Measured data: The self-capacitance induction of the first touch electrode 1 in the comparative example is 146, and the self-capacitance induction of the second touch electrode 2 is 198. After the first embodiment is measured, the self-capacitance induction of the first touch electrode 1 becomes 169, with an improvement ratio of 16%, and the self-capacitance induction of the second touch electrode 2 becomes 229, with an improvement ratio of 16%. In the second embodiment, the measured self-capacitance induction of the first touch electrode 1 reaches 175, with an improvement ratio of 20%, and the self-capacitance induction of the second touch electrode 2 is 217, with an improvement ratio of 9%. The measured data further verifies the effectiveness of the solution, and the first embodiment has a relatively balanced improvement in the self-capacitance induction of the first touch electrode 1 and the second touch electrode 2 during the measurement, while the second embodiment performs better in improving the self-capacitance induction of the first touch electrode 1.

[0145] Through the analysis of these data, it can be known that the design solution of the touch unit 101 in the embodiments of the present application can solve the problem of low touch self-capacitance induction, improve the touch performance, can improve the touch experience of these devices in the pure self-capacitance scanning mode, and reduce the probability of failure of the fingerprint unlocking function.

[0146] Based on the same inventive concept, the fourth embodiment of the present application also provides a display device, which includes the touch panel 100 in the above embodiments.

[0147] Furthermore, the display device can be a wearable product, a mobile phone, a computer, a television, an in-vehicle display device, or other display devices with a display function.

[0148] Although the present application has been described in combination with specific embodiments of the present application, many substitutions, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description.

[0149] It should be noted that some embodiments of the present application have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the above embodiments and still achieve the desired results. Additionally, the processes depicted in the figures do not necessarily require the particular order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0150] Embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application shall be included within the protection scope of the present application.

Claims

1. A touch panel, characterized in that: The touch panel includes a substrate and a plurality of touch units arranged in an array on one side of the substrate, wherein the touch units include: A first touch electrode extending along a first direction; A second touch electrode is extended along a second direction, and the second direction intersects the first direction; The virtual electrode is located between the adjacent first touch electrode and the second touch electrode, and the first touch electrode and the second touch electrode are separated from each other by the virtual electrode.

2. The touch panel according to claim 1, characterized in that: The first direction is perpendicular to the second direction, and the shape of the orthographic projection of the touch control unit on the substrate is a rectangle; Preferably, a ratio between a size of the touch unit along the first direction and a size of the touch unit along the second direction is greater than or equal to 0.95 and less than or equal to 1.05; Preferably, a size of the touch control unit along the first direction is equal to a size of the touch control unit along the second direction.

3. The touch panel according to claim 1, characterized in that: In the same touch control unit, two first touch control electrodes are symmetrically arranged along the first direction, and the two first touch control electrodes are connected via a first electrode connecting portion; The two second touch control electrodes are symmetrically arranged along the second direction, and the two second touch control electrodes are connected via a second electrode connecting portion; Preferably, the first electrode connecting portion and the second electrode connecting portion intersect in space and are located in different metal layers; Preferably, the first electrode connection portion or the second electrode connection portion comprises a plurality of metal wires connected in parallel; Preferably, the first electrode connecting portion or the second electrode connecting portion includes four metal wires connected in parallel.

4. The touch panel according to claim 2, characterized in that: The second touch control electrode comprises a second electrode top section, a second electrode middle section and a second electrode bottom section, and the second electrode top section, the second electrode middle section and the second electrode bottom section are sequentially connected along the second direction away from the geometric center of the touch control unit; Second electrode shoulders are respectively arranged on both sides of the second electrode middle section along the first direction, and the second electrode shoulders extend along the first direction; Preferably, the second electrode middle section is connected to at least two groups of second electrode shoulders arranged at intervals along the second direction; Preferably, a ratio between a size of the middle section of the second electrode along the first direction and a size of the touch control unit along the first direction is greater than or equal to 0.3 and less than or equal to 0.5; Preferably, a ratio between a size of the second electrode shoulder along the first direction and a size of the touch control unit along the first direction is greater than or equal to 0.18 and less than or equal to 0.21; Preferably, the sizes of the second electrode top section, the second electrode middle section and the second electrode bottom section along the first direction increase sequentially; Preferably, in the same touch control unit, the orthographic projection area of ​​the first touch control electrode on the substrate is greater than or equal to 40% of the orthographic projection area of ​​the touch control unit on the substrate, and less than or equal to 50% of the orthographic projection area of ​​the touch control unit on the substrate; Preferably, in the same touch control unit, the orthographic projection area of ​​the second touch control electrode on the substrate is greater than or equal to 40% of the orthographic projection area of ​​the touch control unit on the substrate, and less than or equal to 50% of the orthographic projection area of ​​the touch control unit on the substrate; Preferably, in the same touch unit, the orthographic projection area of ​​the virtual electrode on the substrate is greater than or equal to 8% of the orthographic projection area of ​​the touch unit on the substrate, and less than or equal to 20% of the orthographic projection area of ​​the touch unit on the substrate.

5. The touch panel according to claim 4, characterized in that: The first touch electrode comprises a first electrode top section, a first electrode middle section and a first electrode bottom section, wherein the first electrode top section, the first electrode middle section and the first electrode bottom section are sequentially connected along the first direction away from the geometric center of the touch unit; The first electrode middle section is provided with first electrode protrusions on both sides along the second direction, the first electrode protrusions extend along the first direction, and the first electrode protrusions and the second electrode shoulders are mutually engaged; Preferably, the first electrode bottom section is connected to at least two groups of the first electrode protrusions arranged at intervals along the second direction; Preferably, a ratio between a size of the middle section of the first electrode along the second direction and a size of the touch unit along the second direction is greater than or equal to 0.2 and less than or equal to 0.4; Preferably, the maximum dimension of the first electrode top section along the second direction is smaller than or equal to the dimension of the first electrode middle section along the second direction, and the dimension of the first electrode bottom section along the first direction is larger than the dimension of the first electrode middle section along the second direction.

6. The touch panel according to claim 3, characterized in that: The second touch control electrode comprises a second electrode main peak portion and a second electrode slope portion, and the second electrode main peak portion and the second electrode slope portion are sequentially connected along the second direction away from the geometric center of the touch control unit; Preferably, along the direction away from the geometric center of the touch control unit, the size of the main peak portion of the second electrode along the first direction gradually increases; Preferably, along a direction away from the geometric center of the touch control unit, a size of the second electrode slope portion along the first direction gradually increases; Preferably, a ratio between a maximum dimension of a main peak portion of the second electrode along the first direction and a dimension of the touch control unit along the first direction is greater than or equal to 0.3 and less than or equal to 0.5; Preferably, the minimum dimension of the slope portion of the second electrode along the first direction is greater than the maximum dimension of the main peak portion of the second electrode along the first direction; Preferably, the second electrode side peak portion is formed at the connection between the second electrode slope portion and the second electrode main peak portion, and two second electrode side peak portions are symmetrically arranged on both sides of the second electrode main peak portion; Preferably, the boundary of the second touch electrode includes a first oblique side located at a main peak portion of the second electrode and a second oblique side located at a slope portion of the second electrode; the ratio between the length of the first oblique side and the size of the touch unit along the first direction is greater than or equal to 0.2 and less than or equal to 0.3; the ratio between the length of the second oblique side and the size of the touch unit along the first direction is greater than or equal to 0.2 and less than or equal to 0.3; Preferably, the boundary of the second touch electrode further includes a third oblique side connecting the first oblique side and the second oblique side, and the third oblique side is located at the side peak of the second electrode; the ratio between the length of the third oblique side and the size of the touch unit along the first direction is greater than or equal to 0.05 and less than or equal to 0.1; Preferably, the angle between the first hypotenuse and the first direction is greater than or equal to 50 degrees and less than or equal to 60 degrees; the angle between the second hypotenuse and the first direction is greater than or equal to 55 degrees and less than or equal to 65 degrees; Preferably, the first oblique side and the second oblique side have the same inclination direction, and the third oblique side has an inclination direction opposite to the first oblique side and the second oblique side; Preferably, at least part of the shape of the boundary of the first touch electrode and the boundary of the second touch electrode are the same, so that the first touch electrode and the second touch electrode are embedded in the same touch unit; Preferably, in the same touch control unit, an orthographic projection area of ​​the first touch control electrode on the substrate is greater than or equal to 35% of an orthographic projection area of ​​the touch control unit on the substrate, and less than or equal to 45% of an orthographic projection area of ​​the touch control unit on the substrate; Preferably, in the same touch control unit, an orthographic projection area of ​​the second touch control electrode on the substrate is greater than or equal to 35% of an orthographic projection area of ​​the touch control unit on the substrate, and less than or equal to 45% of an orthographic projection area of ​​the touch control unit on the substrate; Preferably, in the same touch unit, the orthographic projection area of ​​the virtual electrode on the substrate is greater than or equal to 8% of the orthographic projection area of ​​the touch unit on the substrate, and less than or equal to 15% of the orthographic projection area of ​​the touch unit on the substrate.

7. The touch panel according to claim 4 or 6, characterized in that: The boundary of the first touch electrode includes a first sawtooth portion, and the boundary of the second touch electrode includes a second sawtooth portion; Preferably, the first sawtooth portion is arranged at the second electrode top section, the second electrode shoulder, the second electrode middle section and the second electrode bottom section; Preferably, the second sawtooth portion has the same shape as the first sawtooth portion; Preferably, the virtual electrode comprises a third sawtooth portion, and the third sawtooth portion is located between the first sawtooth portion and the second sawtooth portion.

8. The touch panel according to claim 2, characterized in that: The virtual electrode includes a first virtual portion disposed in a corner region of the touch unit; Preferably, the first virtual part is disposed at four corner regions of the touch unit; Preferably, a ratio between a size of the first virtual portion along the first direction and a size of the touch unit along the first direction is greater than or equal to 0.08 and less than or equal to 0.2; Preferably, a ratio between a size of the first virtual portion along the second direction and a size of the touch control unit along the second direction is greater than or equal to 0.02 and less than or equal to 0.

1.

9. The touch panel according to claim 3, characterized in that: An isolation gap is formed between a boundary of the first touch electrode and a boundary of the second touch electrode, and the virtual electrode includes a second virtual portion disposed in the isolation gap; Preferably, the second dummy portion partially fills the isolation gap; Preferably, the second dummy portion is spaced apart from the first electrode connecting portion and the second electrode connecting portion respectively.

10. A display device, characterized in that: It comprises a touch panel as described in any one of claims 1 to 9.

Images