Capacitive touch screens and electronic devices

Abstract

This application provides a capacitive touchscreen and an electronic device, including: a touchscreen body, a first control unit, and a second control unit; the touchscreen body has a first sensing layer and a second sensing layer stacked inside, the first sensing layer and the second sensing layer not in contact; the first sensing layer has multiple first channels and multiple second channels, the first channels and second channels being arranged alternately in sequence; the second sensing layer has multiple third channels and multiple fourth channels, the third channels and fourth channels being arranged alternately in sequence; the first channels and third channels are connected to the first control unit; the second channels and fourth channels are connected to the second control unit. The capacitive touchscreen provided by this application can support the simultaneous operation of two sensing layer combinations, thereby improving the recognition speed of touch position.

Description

Technical Field

[0001] This application relates to display technology, and more particularly to a capacitive touch screen and electronic device. Background Technology

[0002] Currently, many electronic devices are equipped with touchscreens, allowing users to control them by touching the screen. Touchscreens contain a sensor layer that detects touch input.

[0003] Currently, most touchscreens use a diamond pattern as the sensing area in their sensing layer. This setup requires a long driving scan time, resulting in slow recognition of touch positions. Summary of the Invention

[0004] This application provides a capacitive touch screen and electronic device to solve the technical problem of slow speed in recognizing touch positions.

[0005] The capacitive touch screen provided in this application includes: a touch screen body, a first control unit, and a second control unit;

[0006] The touch screen body has a first sensing layer and a second sensing layer stacked inside, and the first sensing layer and the second sensing layer do not contact each other.

[0007] The first sensing layer has multiple first channels and multiple second channels, which are arranged alternately in sequence; the second sensing layer has multiple third channels and multiple fourth channels, which are arranged alternately in sequence.

[0008] The first channel and the third channel are connected to the first control unit; the second channel and the fourth channel are connected to the second control unit.

[0009] In one optional embodiment, the touch screen body further includes a first substrate and a second substrate; the first sensing layer is disposed on a first surface of the first substrate, and the second sensing layer is disposed on a first surface of the second substrate; the second surface of the first substrate is connected to the second surface of the second substrate.

[0010] In one optional embodiment, the touchscreen body further includes a substrate;

[0011] The first sensing layer is disposed on the first surface of the substrate;

[0012] The second sensing layer is disposed on the second side of the substrate.

[0013] In one alternative implementation, the first channel, the second channel, the third channel, and the fourth channel are each a metal mesh.

[0014] In one alternative implementation, the first channel includes a plurality of rhomboid block structures, and adjacent rhomboid block structures are connected.

[0015] And / or, the second channel includes a plurality of diamond-shaped block structures, with adjacent diamond-shaped block structures connected;

[0016] And / or, the third channel includes multiple rhomboid block structures, and adjacent rhomboid block structures are connected;

[0017] And / or, the fourth channel includes multiple rhomboid block structures, with adjacent rhomboid block structures connected.

[0018] In one alternative implementation, the first channel is elongated.

[0019] And / or, the second channel is elongated;

[0020] And / or, the third channel is elongated;

[0021] And / or, the fourth channel is elongated.

[0022] In one alternative embodiment, a plurality of first channels and a plurality of second channels are uniformly distributed in the first sensing layer; and / or, a plurality of third channels and a plurality of fourth channels are uniformly distributed in the second sensing layer.

[0023] In one optional implementation, the first channel in the first sensing layer and the third channel in the second sensing layer are perpendicular to each other;

[0024] The second channel in the first sensing layer is perpendicular to the fourth channel in the second sensing layer.

[0025] In one alternative implementation, when the capacitive touchscreen is operated using a stylus or hand, the first sensing layer is a driving layer and the second sensing layer is a receiving layer.

[0026] Alternatively, the second sensing layer may be a driving layer, and the first sensing layer may be a receiving layer.

[0027] In one alternative implementation, when using an active capacitive stylus to operate the capacitive touchscreen, both the first sensing layer and the second sensing layer are receiving layers.

[0028] This application also provides an electronic device, including a processor and any of the capacitive touch screens described above connected to the processor.

[0029] This application provides a capacitive touchscreen and electronic device, comprising: a touchscreen body, a first control unit, and a second control unit; the touchscreen body internally has a first sensing layer and a second sensing layer stacked together, the first sensing layer and the second sensing layer not in contact; the first sensing layer has multiple first channels and multiple second channels, the first channels and the second channels being arranged alternately in sequence; the second sensing layer has multiple third channels and multiple fourth channels, the third channels and the fourth channels being arranged alternately in sequence; the first channels and the third channels are connected to the first control unit; the second channels and the fourth channels are connected to the second control unit. The capacitive touchscreen provided by this application can support the simultaneous operation of two sensing layer combinations, thereby improving the speed of touch position recognition. Furthermore, by setting the first control unit and the second control unit to recognize electrical signals of different frequencies, it can separately recognize touch operations of multiple objects, avoiding insufficient computing resources in multi-object recognition application scenarios. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1A This is a schematic diagram of an exemplary sensing layer structure;

[0032] Figure 1B This is a schematic diagram illustrating the mutual capacitance formed between an lateral electrode and a longitudinal electrode.

[0033] Figure 2 This is a schematic diagram of the structure of a capacitive touch screen according to an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the structure of a touch screen body according to an embodiment of this application;

[0035] Figure 4 This is a schematic diagram of the structure of the first sensing layer shown in an embodiment of this application;

[0036] Figure 5 This is a schematic diagram of a structure formed by cutting a metal mesh to create a first sensing layer, as shown in one embodiment of this application.

[0037] Figure 6 This is a schematic diagram of the structure of the second sensing layer according to an embodiment of this application;

[0038] Figure 7This is a schematic diagram illustrating a structure for forming a second sensing layer by cutting a metal mesh, according to an embodiment of this application.

[0039] Figure 8 This is a schematic diagram illustrating the stacked arrangement of the first group of channels and the third group of channels according to an embodiment of this application;

[0040] Figure 9 This is a schematic diagram illustrating the stacked arrangement of the second and fourth groups of channels according to an embodiment of this application;

[0041] Figure 10 This is a schematic diagram of the structure of a touch screen body according to another embodiment of this application;

[0042] Figure 11 This is a schematic diagram of the structure of the touch screen body according to another embodiment of this application;

[0043] Figure 12 This is a schematic diagram of a channel structure shown in one embodiment of this application;

[0044] Figure 13 This is a schematic diagram of a channel structure shown in another embodiment of this application.

[0045] Explanation of reference numerals in the attached figures:

[0046] 11: Electrode;

[0047] 12: Electrode;

[0048] 21: Touchscreen body;

[0049] 22: First control unit;

[0050] 23: Second control unit;

[0051] 31: First sensing layer;

[0052] 32: Second sensing layer;

[0053] 41: First Channel;

[0054] 42: Second Channel;

[0055] 51: Metal mesh;

[0056] 61: Third Channel;

[0057] 62: Fourth Channel;

[0058] 71: Metal mesh;

[0059] 72: Cutting line;

[0060] 81: Intersection location;

[0061] 91: Intersection location;

[0062] 101: First substrate;

[0063] 102: Second substrate;

[0064] 111: Substrate;

[0065] 121: Metal mesh structure;

[0066] 122: Rhombus block structure;

[0067] 131: Long strip structure. Detailed Implementation

[0068] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0069] Currently, many electronic devices are equipped with touchscreens, allowing users to control these devices by touching the screen with their fingers or a stylus. Touchscreens are further divided into resistive touchscreens and capacitive touchscreens. Capacitive touchscreens are more sensitive and are therefore widely used in various electronic devices.

[0070] A capacitive touchscreen includes a sensing layer. When a human body touches the screen, the electrical signal in the sensing layer changes, and the touch position can be determined by recognizing this change.

[0071] Capacitive touchscreens include mutual capacitance touchscreens. The sensing layer of a mutual capacitance touchscreen includes horizontal and vertical electrodes, and capacitance is formed where these two sets of electrodes intersect. Specifically, capacitance is formed where the two sets of electrodes do not directly contact each other, but their projections onto the plane intersect. Capacitance also forms between closely spaced horizontal and vertical electrodes. When a finger touches a capacitive touchscreen, it affects the coupling between the two electrodes near the touch point, thus changing the capacitance between them. To detect the mutual capacitance, the horizontal electrodes sequentially emit excitation signals, while all vertical electrodes simultaneously receive signals. This allows us to obtain the capacitance values ​​at all intersections of the horizontal and vertical electrodes, i.e., the capacitance of the entire two-dimensional plane of the touchscreen. Based on the changes in the two-dimensional capacitance of the touchscreen, the coordinates of each touch point can be calculated.

[0072] Figure 1A This is a schematic diagram of an exemplary sensing layer structure.

[0073] like Figure 1AAs shown, the transverse electrode 11 and the longitudinal electrode 12 are mostly configured as multiple connected rhomboid patterns.

[0074] Figure 1B This is a schematic diagram illustrating an example of mutual capacitance formed between a transverse electrode and a longitudinal electrode.

[0075] like Figure 1B As shown, a capacitor is formed where the transverse electrode 11 and the longitudinal electrode 12 intersect in the plane projection. A capacitor is also formed where the electrodes 11 and 12 are close to each other in the non-intersecting part.

[0076] The location of the touch point can be detected by scanning the capacitance at the intersection of the two.

[0077] The sensing layer contains multiple channels, which means there are multiple intersections of horizontal and vertical electrodes. As a result, the scanning time of the control unit is longer, and the computing resources required for recognizing different objects are also insufficient.

[0078] Figure 2 This is a schematic diagram of the structure of a capacitive touch screen according to an embodiment of this application.

[0079] like Figure 2 As shown, the capacitive touch screen provided in this application embodiment includes: a touch screen body 21, a first control unit 22, and a second control unit 23.

[0080] The touchscreen body 21 is connected to the first control unit 22 and also to the second control unit 23. The first control unit 22 can identify the touch position in the touchscreen body 21, and the second control unit 23 can also identify the touch position in the touchscreen body 21.

[0081] Figure 3 This is a schematic diagram of the structure of a touch screen body according to an embodiment of this application.

[0082] like Figure 3 As shown, the touch screen body 21 provided in this application has a first sensing layer 31 and a second sensing layer 32 stacked inside, and the first sensing layer 31 and the second sensing layer 32 do not contact each other.

[0083] When the first sensing layer 31 and the second sensing layer 32 are energized, a capacitor can be formed between them.

[0084] Figure 4 This is a schematic diagram of the structure of the first sensing layer shown in an embodiment of this application.

[0085] like Figure 4 As shown, the first sensing layer 31 has multiple first channels 41 and multiple second channels 42, which are arranged alternately.

[0086] In this arrangement, the first channel 41 and the second channel 42 are arranged alternately, with multiple first channels 41 forming a first group of channels and multiple second channels 42 forming a second group of channels. The first channels 41 and the second channels 42 are not connected.

[0087] Specifically, the metal mesh can be cut to obtain, for example... Figure 4 The first sensing layer 31 is shown.

[0088] Figure 5 This is a schematic diagram of a structure formed by cutting a metal mesh to create a first sensing layer, as shown in one embodiment of this application.

[0089] Furthermore, such as Figure 5 As shown, the metal mesh 51 can be cut, for example, along the cutting line 52. After cutting, multiple first channels 41 and multiple second channels 42 are formed.

[0090] In practical applications, multiple first channels 41 can be connected together using leads, and multiple second channels 42 can be connected together using leads. In the capacitive touch screen provided in this application, the first sensing layer includes two sets of independent channels.

[0091] Figure 6 This is a schematic diagram of the structure of the second sensing layer shown in an embodiment of this application.

[0092] like Figure 6 As shown, the second sensing layer 32 has multiple third channels 61 and multiple fourth channels 62, which are arranged alternately.

[0093] The third channel 61 and the fourth channel 62 are arranged alternately, with multiple third channels 61 forming a third group of channels and multiple fourth channels 62 forming a fourth group of channels. The third channels 61 and the fourth channels 62 are not connected.

[0094] Specifically, the metal mesh can be cut to obtain, for example... Figure 6 The second sensing layer 32 is shown.

[0095] Figure 7 This is a schematic diagram of a structure for forming a second sensing layer by cutting a metal mesh, as shown in one embodiment of this application.

[0096] Furthermore, such as Figure 7 As shown, the metal mesh 71 can be cut, for example, along the cutting line 72. After cutting, multiple third channels 61 and multiple fourth channels 62 are formed.

[0097] In practical applications, multiple third channels 61 can be connected together using leads, and multiple fourth channels 62 can be connected together using leads. In the capacitive touch screen provided in this application, the second sensing layer includes two sets of independent channels.

[0098] The first channel 41 and the third channel 61 are connected to the first control unit 22. The first control unit 22 can receive the first electrical signal generated by the stacked arrangement of the first channel 41 and the third channel 61, and thus determine the touch position based on the first electrical signal.

[0099] Figure 8 This is a schematic diagram illustrating the stacked arrangement of the first group of channels and the third group of channels in one embodiment of this application.

[0100] like Figure 8 As shown, after the first group of channels and the third group of channels are stacked, a capacitance will be generated at the intersection 81. The first control unit determines the touch position by detecting these capacitance values.

[0101] Specifically, the second channel 42 and the fourth channel 62 are connected to the second control unit 23. The second control unit 23 can receive the second electrical signal generated by the stacked arrangement of the second channel 42 and the fourth channel 62, and thus determine the touch position based on the second electrical signal.

[0102] Figure 9 This is a schematic diagram illustrating the stacked arrangement of the second and fourth groups of channels according to an embodiment of this application.

[0103] like Figure 9 As shown, after the second group of channels and the fourth group of channels are stacked, a capacitance will be generated at the intersection 91. The second control unit determines the touch position by detecting these capacitance values.

[0104] The capacitive touchscreen provided in this solution uses a combination of multiple first channels 41 and multiple third channels 61 to sense touch operations. When a user touches the screen, the first control unit can recognize a touch result. Similarly, a combination of multiple second channels 42 and multiple fourth channels 62 can sense touch operations, and when a user touches the screen, the second control unit can recognize another touch result. Therefore, the capacitive touchscreen provided in this application can simultaneously support both of these sensing layer combinations, allowing both combinations to work concurrently, thereby improving the speed of touch location recognition.

[0105] Furthermore, when different sensor layer combinations operate at different frequencies, the solution provided in this application can also recognize two or more touch objects. Specifically, adaptive touch objects corresponding to different frequency classes can be designed, thereby supporting two or more customized frequency touch objects. For example, a stylus can be set up, with pens emitting different operating frequencies corresponding to different frequency sensor layer combinations. In this implementation, the touchscreen can support two or even more pens.

[0106] The capacitive touch screen provided in this application includes a touch screen body, a first control unit, and a second control unit. The touch screen body has a first sensing layer and a second sensing layer stacked inside, and the first sensing layer and the second sensing layer do not contact each other. The first sensing layer has multiple first channels and multiple second channels, which are arranged alternately in sequence. The second sensing layer has multiple third channels and multiple fourth channels, which are arranged alternately in sequence. The first channel and the third channel are connected to the first control unit. The second channel and the fourth channel are connected to the second control unit.

[0107] The capacitive touchscreen provided in this application supports the simultaneous operation of two sets of sensing channels. Simultaneous operation of two sets of sensing channels can shorten the response time to touch. For example, by setting the scanning order of the two sets of sensing channels, starting from opposite sides of the sensing area, the time to scan the entire touch area can be significantly reduced, as each channel only needs to scan half the area to cover the entire area for recognition, greatly accelerating the screen's response time and speeding up multi-point recognition and positioning. In this implementation, each sensing combination only needs to scan half the area to achieve the full coverage effect of a single sensing layer in existing solutions, thus improving the speed of touch position recognition. Furthermore, by configuring the first and second control units to recognize electrical signals of different frequencies, it is possible to separately recognize touch operations on multiple objects, avoiding insufficient computing resources in multi-object recognition applications.

[0108] In one optional embodiment, the capacitive touchscreen further includes a first substrate and a second substrate. Specifically, the touchscreen body also includes the first substrate and the second substrate.

[0109] Figure 10 This is a schematic diagram of the structure of a touch screen body according to another embodiment of this application.

[0110] like Figure 10 As shown, the touch screen body 21 includes a first substrate 101 and a second substrate 102.

[0111] The first sensing layer 31 is disposed on the first surface of the first substrate 101, and the second sensing layer is disposed on the first surface of the second substrate 102; the second surface of the first substrate is connected to the second surface of the second substrate.

[0112] Specifically, the first substrate 101 and the second substrate 102 can be transparent glass. The first sensing layer 31 can be deposited on the first surface of the first substrate 101, and the second sensing layer 32 can be deposited on the first surface of the second substrate 102. The second surfaces of the first substrate 101 and the second substrate 102 can be bonded together to connect them.

[0113] In another alternative embodiment, the touchscreen body further includes a substrate.

[0114] Figure 11 This is a schematic diagram of the structure of a touch screen body according to another embodiment of this application.

[0115] like Figure 11 As shown, the touch screen body 21 also includes a substrate 111, a first sensing layer 31 disposed on the first surface of the substrate 111, and a second sensing layer 32 disposed on the second surface of the substrate 111.

[0116] Furthermore, the substrate 111 can be transparent glass, and a first sensing layer 31 and a second sensing layer 32 can be deposited on both sides of the substrate 111 respectively.

[0117] In one alternative implementation, the first channel, the second channel, the third channel, and the fourth channel are all metal meshes.

[0118] Figure 12 This is a schematic diagram of a channel structure shown in one embodiment of this application.

[0119] like Figure 12 As shown, the first channel, second channel, third channel, and fourth channel can each contain a metal mesh structure 121.

[0120] In this embodiment, the specific shape of the grid is not limited.

[0121] During manufacturing, a metal mesh structure can be plated onto a substrate, and then the mesh can be cut to form a shape like... Figure 12 The channel shown.

[0122] In one alternative implementation, the first channel includes a plurality of rhomboid block structures, and adjacent rhomboid block structures are connected.

[0123] And / or, the second channel includes a plurality of diamond-shaped block structures, with adjacent diamond-shaped block structures connected;

[0124] And / or, the third channel includes multiple rhomboid block structures, and adjacent rhomboid block structures are connected;

[0125] And / or, the fourth channel includes multiple rhomboid block structures, with adjacent rhomboid block structures connected.

[0126] Please continue to refer to this. Figure 12 The channel includes multiple interconnected rhomboid block structures 122. For example, the metal mesh can be cut into shapes such as... Figure 12 The pattern shown forms a channel.

[0127] In one alternative implementation, the first channel is elongated.

[0128] And / or, the second channel is elongated;

[0129] And / or, the third channel is elongated;

[0130] And / or, the fourth channel is elongated.

[0131] Figure 13 This is a schematic diagram of a channel structure shown in another embodiment of this application.

[0132] Any channel structure can be like Figure 13 The structure shown.

[0133] like Figure 13 As shown, the channel can be a long strip structure 131. For example, a metal mesh can be cut into shapes such as... Figure 13 The pattern shown forms a channel.

[0134] In one optional embodiment, a plurality of first channels 41 and a plurality of second channels 42 are uniformly distributed in the first sensing layer 31; and / or, a plurality of third channels 61 and a plurality of fourth channels 62 are uniformly distributed in the second sensing layer.

[0135] Specifically, the interval between adjacent first channels 41 and second channels 42 is equal to a first preset value, and the interval between adjacent third channels 61 and fourth channels 62 is equal to a second preset value. The intervals between adjacent channels are all equal, thereby enabling the channels to be evenly distributed on the sensing layer.

[0136] In one alternative embodiment, the first channel 41 in the first sensing layer 31 is perpendicular to the third channel 61 in the second sensing layer 32; the second channel 42 in the first sensing layer 31 is perpendicular to the fourth channel 62 in the second sensing layer 32.

[0137] The first channel 41 and the third channel 61 are connected to the first control unit 22. Since the two channels are set vertically, many intersection areas will be generated between the multiple first channels 41 and the multiple third channels 61. These intersections will generate capacitance, which will be detected by the first control unit 22.

[0138] The second channel 42 and the fourth channel 62 are connected to the second control unit 23. Since the two channels are set vertically, many intersection areas will be generated between the multiple second channels 42 and the multiple fourth channels 62. These intersections will generate capacitance, which will be detected by the second control unit 23.

[0139] Specifically, when using a stylus or hand to operate the capacitive touchscreen provided in this application, the first sensing layer is the driving layer and the second sensing layer is the receiving layer; or, the second sensing layer is the driving layer and the first sensing layer is the receiving layer.

[0140] At the location touched by the stylus or hand, the sensing layer, acting as the driving layer, can send electrical signals, and the sensing layer, acting as the receiving layer, can receive the electrical signals sent by the driving layer. The control unit connected to the receiving layer can determine the touch position based on the electrical signals received by the receiving layer.

[0141] Furthermore, when using an active capacitive pen to control a capacitive touchscreen, both the first sensing layer and the second sensing layer are receiving layers.

[0142] In practical applications, when an active capacitive stylus performs touch operations on a capacitive touchscreen, both the first and second sensing layers can receive the electrical signals sent by the stylus. The first control unit connected to the first sensing layer can receive the electrical signals sent by the first sensing layer, and the second control unit connected to the second sensing layer can receive the electrical signals sent by the second sensing layer. In this implementation, the touch position can be determined based on the two control units, thus making the recognition results more accurate.

[0143] Optionally, this application also provides an electronic device, which includes a processor and a capacitive touch screen provided in any of the above embodiments connected to the processor.

[0144] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0145] It should be noted that in the description of this application, the terms "first" and "second" are used only for convenience in describing different components and should not be construed as indicating or implying a sequential relationship, relative importance, or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features.

[0146] In this application, unless otherwise expressly specified, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly defined. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0147] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A capacitive touch screen, characterized by, The capacitive touch screen comprises a touch screen body, a first control unit and a second control unit. The touch screen body is internally provided with a first sensing layer and a second sensing layer arranged in layers, and the first sensing layer and the second sensing layer are not in contact with each other. The first sensing layer has a plurality of first channels and a plurality of second channels, and the first channels and the second channels are arranged in alternately staggered order; the second sensing layer has a plurality of third channels and a plurality of fourth channels, and the third channels and the fourth channels are arranged in alternately staggered order; wherein the first channels and the second channels are not in communication with each other; the third channels and the fourth channels are not in communication with each other. The first channels, the third channels and the first control unit are connected; the second channels, the fourth channels and the second control unit are connected; the first control unit is configured to independently determine a first touch position based on the interaction of the first channels and the third channels; the second control unit is configured to independently determine a second touch position based on the interaction of the second channels and the fourth channels. When the capacitive touch screen is controlled by using an active capacitive pen, the first sensing layer and the second sensing layer are both receiving layers. The touch screen body further comprises a first substrate and a second substrate.

2. The capacitive touch screen of claim 1, wherein, The first sensing layer is arranged on a first surface of the first substrate, and the second sensing layer is arranged on a first surface of the second substrate; a second surface of the first substrate is connected to a second surface of the second substrate. The touch screen body further comprises a substrate.

3. The capacitive touch screen of claim 1, wherein, The first sensing layer is arranged on a first surface of the substrate. The second sensing layer is arranged on a second surface of the substrate. The first channels, the second channels, the third channels and the fourth channels are metal grids respectively.

4. The capacitive touch screen according to any one of claims 1-3, wherein, 5. The capacitive touch screen according to any one of claims 1-3, wherein: the first channels comprise a plurality of diamond block structures, and adjacent diamond block structures are in communication; and / or, the second channels comprise a plurality of diamond block structures, and adjacent diamond block structures are in communication; and / or, the third channels comprise a plurality of diamond block structures, and adjacent diamond block structures are in communication; and / or, the fourth channels comprise a plurality of diamond block structures, and adjacent diamond block structures are in communication.

6. The capacitive touch screen according to any one of claims 1-3, wherein: the first channels are long strips; and / or, the second channels are long strips; and / or, the third channels are long strips; and / or, the fourth channels are long strips.

7. The capacitive touch screen according to any one of claims 1-3, wherein: the first sensing layer uniformly has a plurality of first channels and a plurality of second channels; and / or, the second sensing layer uniformly has a plurality of third channels and a plurality of fourth channels.

8. The capacitive touch screen according to any one of claims 1-3, wherein: the first channels in the first sensing layer and the third channels in the second sensing layer are perpendicular to each other; the second channels in the first sensing layer and the fourth channels in the second sensing layer are perpendicular to each other. ​ 9. The capacitive touch screen according to any one of claims 1-3, wherein, In the use of the capacitive touch screen by a stylus or a hand, the first sensing layer is a driving layer and the second sensing layer is a receiving layer. Or, the second sensing layer is a driving layer and the first sensing layer is a receiving layer.

10. An electronic device, comprising: A capacitive touch screen as claimed in any one of claims 1-9, comprising a processor.

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