Pressure sensing module, touch display screen and touch electronic device

Abstract

The present invention provides a pressure sensing module, a touch display screen and a touch electronic device, wherein the pressure sensing module comprises: a substrate; a plurality of pressure sensing channels distributed in an array and arranged on the substrate, wherein any two of the plurality of pressure sensing channels are respectively a first pressure sensing channel and a second pressure sensing channel, and one end of the first pressure sensing channel and one end of the second pressure sensing channel are respectively connected to the same pin. Through the technical solution of the present invention, on the one hand, the number of pins is reduced, and the operating difficulty of the bonding process is reduced; on the other hand, the pressure sensing values ​​are richer, the results calculated according to the pressure sensing values ​​are more accurate, and the corresponding pressure sensing sensitivity is higher, thereby improving the user experience.

Description

Technical Field

[0001] The present invention relates to the field of thin film pressure-sensitive touch screens, and in particular to a pressure sensing module, a touch display screen and a touch electronic device. Background Art

[0002] In related technologies, such as Figure 1 As shown, the pin group 102 includes four pins, two of which are connected to the first pressure sensing channel 102, and the other two are connected to the first pressure sensing channel 104, that is, the four pins can only detect the channel resistance of two pressure sensing channels. When the pins are limited, the channel resistance data collected by the system is less, and the accuracy and sensitivity of the product are lower. Or under a certain number of channels, the number of pins is relatively large, the required space is large, and bonding is more difficult. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] Therefore, an object of the present invention is to provide a pressure sensing module.

[0005] Another object of the present invention is to provide a touch display screen.

[0006] Another object of the present invention is to provide a touch-controlled electronic device.

[0007] In order to achieve the above-mentioned purpose, according to an embodiment of the first aspect of the present invention, a pressure sensing module is provided, comprising: a substrate; a plurality of pressure sensing channels distributed in an array and arranged on the substrate, wherein any two pressure sensing channels among the plurality of pressure sensing channels are respectively a first pressure sensing channel and a second pressure sensing channel, one end of the first pressure sensing channel and one end of the second pressure sensing channel are respectively connected to the same pin, and the other ends of the first pressure sensing channel and the second pressure sensing channel are respectively connected to other two different pins.

[0008] In this technical solution, each pressure sensing channel has two ends. By connecting one end of any two pressure sensing channels to the same pin respectively, on the one hand, compared with the connection method in the prior art in which the first pressure sensing channel and the second pressure sensing channel are respectively connected to two different pins, the number of pins is reduced and the operating difficulty of the bonding process is reduced. On the other hand, compared with the solution in the prior art in which only the pressure sensing value of the first pressure sensing channel and the pressure sensing value of the second pressure sensing channel are collected, the first pressure channel can be connected to the second pressure channel to collect the pressure sensing values ​​at both ends of the first pressure channel and the second pressure channel, so that the pressure sensing values ​​are richer, the results calculated based on the pressure sensing values ​​are more accurate, and the corresponding pressure sensing sensitivity is higher, thereby improving the user experience.

[0009] In the above technical solution, preferably, the pressure sensing channel is any one of a resistive sensing channel, a capacitive sensing channel and a piezoelectric film sensing channel.

[0010] In this technical solution, when the pressure sensing channel is a resistive sensing channel, the pressure sensing value corresponds to the change in the resistance value of the pressure sensing channel; when the pressure sensing channel is a capacitive sensing channel, the pressure sensing value corresponds to the change in the capacitance value of the pressure sensing channel; when the pressure sensing channel is a piezoelectric film sensing channel, the pressure sensing value corresponds to the change in the charge of the pressure sensing channel. Regardless of the above sensing channel mode, it needs to be transmitted to the control chip through a pin to determine the sensing instruction based on the pressure sensing value. By sharing one pin for two channels, the data collection amount is improved.

[0011] In any of the above technical solutions, preferably, the first pressure sensing channel is arranged adjacent to the second pressure sensing channel, the first end of the first pressure sensing channel is connected to the first pin, the second end of the first pressure sensing channel is connected to the second pin, the first end of the second pressure sensing channel is connected to the second pin, and the second end of the second pressure sensing channel is connected to the third pin, so that the first pressure sensing channel is connected to the second pressure sensing channel.

[0012] In this technical solution, the first pressure sensing channel and the second pressure sensing channel are arranged adjacent to each other. When the user's touch and pressure area covers both the first pressure sensing channel and the second pressure sensing channel, the channel connects the first end of the first pressure sensing channel to the first pin, the second end of the first pressure sensing channel to the second pin, the first end of the second pressure sensing channel to the second pin, and the second end of the second pressure sensing channel to the third pin, so that the first pressure sensing channel and the second pressure sensing channel share the second pin. Compared with the pin connection method in the prior art, the amount of sensing values ​​collected can be increased, thereby improving the accuracy of pressure sensing and improving the user experience.

[0013] In any of the above technical solutions, preferably, the first pressure sensing channel and the second pressure sensing channel are arranged on the same side of the substrate, wherein the first pressure sensing channel and the second pressure sensing channel are arranged side by side along the length direction of the substrate, or the first pressure sensing channel and the second pressure sensing channel are arranged side by side along the width direction of the substrate.

[0014] In this technical solution, when the first pressure sensing channel and the second pressure sensing channel are arranged on the same side of the substrate, according to the array method of the pressure sensing channels, the first pressure sensing channel and the second pressure sensing channel can be arranged side by side along the length direction of the substrate, or can be arranged side by side along the width direction of the substrate. When the touch and pressure area covers the first pressure sensing channel and the second pressure sensing channel at the same time, at least three sensing values ​​can be collected, and then the corresponding pressure sensing instructions can be determined through the sensing values.

[0015] In addition, when a plurality of pressure sensing channels (greater than or equal to 3) respectively have a common pin, the plurality of pressure sensing channels are arranged side by side along the length direction of the substrate, or along the width direction of the substrate.

[0016] In any of the above technical solutions, preferably, the first pressure sensing channel and the second pressure sensing channel are symmetrically arranged relative to the substrate.

[0017] In this technical solution, the first pressure sensing channel and the second pressure sensing channel can also be respectively arranged on both sides of the substrate. On the one hand, two parallel sensing channels are arranged in the same area to collect pressure sensing values ​​of the two channels, which is conducive to improving the data collection amount and thus improving the sensitivity of pressure touch. On the other hand, the first end of the first pressure sensing channel can be connected to the first pin, the second end of the first pressure sensing channel can be connected to the second pin, the first end of the second pressure sensing channel can be connected to the first pin, and the second end of the second pressure sensing channel can be connected to the second pin. When a short circuit occurs in the first pressure sensing channel or the second pressure sensing channel, one sensing channel can still be retained to collect the sensing output, thereby ensuring the normal execution of the pressure sensing operation.

[0018] In any of the above technical solutions, preferably, when the pressure sensing channel is a resistive sensing channel, the first pressure sensing channel is formed by a transparent piezoresistive line that is bent back and forth, and / or the second pressure sensing channel is formed by a transparent piezoresistive line that is bent back and forth.

[0019] In this technical solution, by setting the wiring shape of the first pressure sensing channel and the wiring shape of the second pressure sensing channel to bend back and forth in a specified direction, the wiring length of the varistor can be maximized. Since the deformation of the varistor is mainly a change in length, the reciprocating bending structure can increase the wiring length of the varistor within a limited area as much as possible, thereby increasing the output voltage signal and further improving the detection sensitivity.

[0020] In any of the above technical solutions, preferably, the pressure sensing channel is connected to the pin through a transparent wire, wherein the transparent varistor circuit is at least one of ITO, silver-doped ITO, nanosilver wire, graphene, nanometal mesh, and carbon nanotubes, and the material of the wire is at least one of transparent ITO, nanosilver wire, nanocopper wire, nanometal mesh, graphene, polyaniline, PEDOT or carbon nanotubes.

[0021] According to the technical solution of the second aspect of the present invention, a touch display screen is provided, comprising: a deformable insulating cover plate, the front side of the insulating cover plate is used to detect the user's touch operation; and also includes a pressure sensing module, the pressure sensing module is attached to the back side of the insulating cover plate, and the pressure sensing module determines the corresponding touch instruction according to the touch operation.

[0022] In this technical solution, by attaching the above-mentioned pressure sensing module (Touch Sensor) to the back side of the insulating cover glass (CG), the accuracy of the touch display screen in detecting touch commands is improved without increasing the hardware cost of the touch display screen, which is conducive to mass production and market promotion.

[0023] According to the technical solution of the third aspect of the present invention, a touch electronic device is provided, including: the touch display screen in the technical solution of the second aspect of the present invention, and the touch electronic device is one of a mobile phone, a tablet computer, a notebook, a monitor, a television and a wearable smart device.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and, in part, will be obvious from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 A schematic diagram showing the connection between the pressure sensing channel and the pin in the related art is shown;

[0027] Figure 2 A schematic diagram showing the connection between the pressure sensing channel and the pin according to an embodiment of the present invention is shown;

[0028] Figure 3 A schematic diagram showing the connection between the pressure sensing channel and the pin according to another embodiment of the present invention is shown;

[0029] Figure 4 A schematic diagram showing the connection between the pressure sensing channel and the pin according to another embodiment of the present invention is shown;

[0030] Figure 5 A circuit diagram of a Wheatstone bridge is shown;

[0031] Figure 6 A schematic plan view of a pressure sensing module according to an embodiment of the present invention is shown.

[0032] in, Figures 1 to 6 The corresponding relationship between the reference numerals and the components is as follows:

[0033] 102 pin group, 104 first pressure sensing channel, 106 second pressure sensing, 202 substrate, 204 first pressure sensing channel, 206 second pressure sensing channel, 208 first pin, 210 second pin, 212 third pin, 214 third pressure sensing channel, 216 fourth pin, 204A first resistor, 206A second resistor, 218 flexible circuit board, 220 pressure sensing chip. DETAILED DESCRIPTION

[0034] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0036] Combine the following Figures 2 to 6 The pressure sensing module according to the embodiment of the present invention is described in detail.

[0037] like Figures 2 to 6 As shown, the pressure sensing module according to an embodiment of the present invention includes: a substrate 202; a plurality of pressure sensing channels distributed in an array, which are arranged on the substrate 202, wherein any two pressure sensing channels among the plurality of pressure sensing channels are respectively a first pressure sensing channel 204 and a second pressure sensing channel 206, and one end of the first pressure sensing channel 204 and one end of the second pressure sensing channel 206 are respectively connected to the same pin.

[0038] In this embodiment, the pressure sensing channels have two ends. By connecting one end of any two pressure sensing channels to the same pin respectively, on the one hand, compared with the connection method in the prior art in which the first pressure sensing channel 204 and the second pressure sensing channel 206 are respectively connected to two different pins, the number of pins is reduced and the operating difficulty of the bonding process is reduced. On the other hand, compared with the scheme in the prior art in which only the pressure sensing value of the first pressure sensing channel 204 and the pressure sensing value of the second pressure sensing channel 206 are collected, the first pressure channel can be connected to the second pressure channel to collect the pressure sensing values ​​at both ends of the first pressure channel and the second pressure channel, so that the pressure sensing values ​​are richer, the results calculated according to the pressure sensing values ​​are more accurate, and the corresponding pressure sensing sensitivity is higher, thereby improving the user experience.

[0039] The first pressure sensing channel 204 and the second pressure sensing channel 206 may be disposed adjacent to each other or separately from each other.

[0040] The substrate 202 may be rectangular or circular, and the substrate 202 may be a rigid substrate such as glass, tempered glass, sapphire glass, etc., or a flexible substrate such as PEEK (polyetheretherketone), PI (Polyimide), PET (polyethyleneterephthalate), PC (polycarbonate), PES (polyethylene succinate), PMMA (polymethylmethacrylate) and a composite material of any two thereof.

[0041] Among them, two pressure sensing channels can have one common pin, three pressure sensing channels can have two common pins, four pressure sensing channels can have three common pins, and so on, which can further reduce the number of pins.

[0042] The number of shared pins is related to the area occupied by a pressure sensing channel.

[0043] In the above embodiment, preferably, the pressure sensing channel is any one of a resistive sensing channel, a capacitive sensing channel and a piezoelectric film sensing channel.

[0044] In this embodiment, when the pressure sensing channel is a resistive sensing channel, the pressure sensing value corresponds to the change in the resistance value of the pressure sensing channel; when the pressure sensing channel is a capacitive sensing channel, the pressure sensing value corresponds to the change in the capacitance value of the pressure sensing channel; when the pressure sensing channel is a piezoelectric film sensing channel, the pressure sensing value corresponds to the change in the charge of the pressure sensing channel. Regardless of the above sensing channel mode, it needs to be transmitted to the control chip through a pin to determine the sensing instruction based on the pressure sensing value. By sharing one pin for two channels, the data collection amount is improved.

[0045] Embodiment 1:

[0046] like Figure 2 and Figure 6 As shown, in any of the above embodiments, preferably, the first pressure sensing channel 204 is adjacent to the second pressure sensing channel 206, the first end of the first pressure sensing channel 204 is connected to the first pin 208, the second end of the first pressure sensing channel 204 is connected to the second pin 210, the first end of the second pressure sensing channel 206 is connected to the second pin 210, and the second end of the second pressure sensing channel 206 is connected to the third pin 212, so that the first pressure sensing channel 204 is connected to the second pressure sensing channel 206.

[0047] In this embodiment, the first pressure sensing channel 204 and the second pressure sensing channel 206 are arranged adjacent to each other. When the user's touch and pressure area covers both the first pressure sensing channel 204 and the second pressure sensing channel 206, the channel connects the first end of the first pressure sensing channel 204 to the first pin 208, the second end of the first pressure sensing channel 204 to the second pin 210, the first end of the second pressure sensing channel 206 to the second pin 210, and the second end of the second pressure sensing channel 206 to the third pin 212, so that the first pressure sensing channel 204 and the second pressure sensing channel 206 share the second pin 210. Compared with the pin connection method in the prior art, the amount of sensing values ​​collected can be increased, thereby improving the accuracy of pressure sensing and improving the user experience.

[0048] Embodiment 2:

[0049] like Figure 3As shown, the invention comprises a first pressure sensing channel 204, a second pressure sensing channel 206 and a third pressure sensing channel 214 arranged in parallel, wherein a first end of the first pressure sensing channel is connected to a first pin 208, a second end of the first pressure sensing channel 204 is connected to a second pin 210, a first end of the second pressure sensing channel 206 is connected to the second pin 210, a second end of the second pressure sensing channel 206 is connected to a third pin 212, a first end of the third pressure sensing channel 214 is connected to the third pin 212, and a second end of the third pressure sensing channel 214 is connected to a fourth pin 216, that is, there are two common pins, and compared with the prior art in which the pressure sensing values ​​of the first pressure sensing channel, the second pressure sensing channel and the third sensing channel are collected separately, the pressure sensing value between the first pressure sensing channel 204 and the second pressure sensing channel 206, the pressure sensing value between the second pressure sensing channel 206 and the third sensing channel 214, and the pressure sensing values ​​between the first pressure sensing channel 204, the second pressure sensing channel 206 and the third pressure sensing channel 214 are collected, so as to further improve the accuracy of pressure data calculation.

[0050] Embodiment three:

[0051] like Figure 2 As shown, in any of the above embodiments, preferably, the first pressure sensing channel 204 and the second pressure sensing channel 206 are arranged on the same side of the substrate 202, wherein the first pressure sensing channel 204 and the second pressure sensing channel 206 are arranged side by side along the length direction of the substrate 202, or the first pressure sensing channel 204 and the second pressure sensing channel 206 are arranged side by side along the width direction of the substrate 202.

[0052] In this embodiment, when the first pressure sensing channel 204 and the second pressure sensing channel 206 are arranged on the same side of the substrate 202, according to the array method of the pressure sensing channels, the first pressure sensing channel 204 and the second pressure sensing channel 206 can be arranged side by side along the length direction of the substrate 202, or can be arranged side by side along the width direction of the substrate 202. When the touch and pressure area covers the first pressure sensing channel 204 and the second pressure sensing channel 206 at the same time, at least three sensing values ​​can be collected, and then the corresponding pressure sensing instructions can be determined according to the sensing values.

[0053] In addition, when a plurality of pressure sensing channels (greater than or equal to 3) respectively have a common pin, the plurality of pressure sensing channels are arranged side by side along the length direction of the substrate 202 or along the width direction of the substrate 202 .

[0054] Embodiment 4:

[0055] In any of the above embodiments, preferably, the first pressure sensing channel 204 and the second pressure sensing channel 206 are symmetrically arranged relative to the substrate 202 .

[0056] In this embodiment, the first pressure sensing channel 204 and the second pressure sensing channel can also be respectively arranged on both sides of the substrate 202. On the one hand, two parallel sensing channels are arranged in the same area to collect pressure sensing values ​​of the two channels, which is beneficial to improve the data collection amount and thus improve the sensitivity of pressure touch. On the other hand, the first end of the first pressure sensing channel 204 can be connected to the first pin 208, the second end of the first pressure sensing channel 204 can be connected to the second pin 210, the first end of the second pressure sensing channel 206 can be connected to the first pin 208, and the second end of the second pressure sensing channel 206 can be connected to the second pin 210. When a short circuit occurs in the first pressure sensing channel 204 or the second pressure sensing channel 206, one sensing channel can still be retained to collect the sensing output, thereby ensuring the normal execution of the pressure sensing operation.

[0057] Embodiment five:

[0058] like Figures 2 to 4 As shown, in any of the above embodiments, preferably, when the pressure sensing channel is a resistive sensing channel, the first pressure sensing channel is formed by a transparent piezoresistive line that is bent back and forth to form R1, and / or the second pressure sensing channel is formed by a transparent piezoresistive line that is bent back and forth to form R2.

[0059] In this embodiment, by setting the wiring shape of the first pressure sensing channel and the wiring shape of the second pressure sensing channel to bend back and forth in a specified direction, the wiring length of the varistor can be maximized. Since the deformation of the varistor is mainly a change in length, the reciprocating bending structure can increase the wiring length of the varistor within a limited area as much as possible, thereby increasing the output voltage signal and further improving the detection sensitivity.

[0060] In addition, the first pressure sensing channel and the second pressure sensing channel may also be in a spirally nested fan-shaped or arc-shaped shape.

[0061] Specifically, Figure 2 and Figure 4 As shown, after the sensing channel is bent back and forth in a specified direction, it is bent back and forth in the opposite direction to form a loop.

[0062] In any of the above embodiments, preferably, the pressure sensing channel is connected to the pin through a transparent wire, wherein the transparent varistor circuit is at least one of ITO, silver-doped ITO, nanosilver wire, graphene, nanometal mesh, and carbon nanotubes, and the material of the wire is at least one of transparent ITO, nanosilver wire, nanocopper wire, nanometal mesh, graphene, polyaniline, PEDOT, or carbon nanotubes.

[0063] Embodiment six:

[0064] like Figures 4 to 6 As shown, in any of the above embodiments, preferably, it also includes: a pressure sensing chip 220, the pressure sensing chip 220 includes a Wheatstone bridge circuit, the first pin 208, the second pin 210 and the third pin 212 are respectively connected to the Wheatstone bridge circuit, wherein after the substrate 202 is touched, the resistance change between the first pin 208 and the second pin 210, the resistance change between the second pin 210 and the third pin 212, and the resistance change between the first pin 208 and the third pin 212 are respectively generated by detection through the Wheatstone bridge circuit.

[0065] like Figure 4 and Figure 5 As shown, in this embodiment, the resistance change is detected by connecting the auxiliary resistors R1, R2, R3 in the Wheatstone bridge circuit and the first resistor 204A and the second resistor 206A constituting the pressure sensing channel in series and parallel, and the change of the electrical signal caused by the change of the resistance value is transmitted to the pressure sensing chip 220. Compared with the single-arm bridge solution in the prior art, Figure 5 As shown, the variable resistance value of the pressure sensing channel is two variable resistors △R1 and △R2 connected in parallel. Compared with collecting only one variable resistance value, the variable resistance value corresponding to the sensing value is more accurate. Since the resistance value of the pressure sensing channel changes little after being touched, in order to facilitate subsequent signal analysis and processing, the Wheatstone bridge circuit is used here to detect the resistance value change of the pressure sensing channel, and then other module circuits of the pressure sensing chip 220 perform signal amplification and other processing.

[0066] In any of the above embodiments, preferably, the first pin 208 , the second pin 210 and the third pin 212 are fixed in the flexible circuit board 218 by pressing.

[0067] In this embodiment, the first pin 208, the second pin 210 and the third pin 212 are pressed and fixed in the flexible circuit board 218. When two adjacent pressure sensing channels share a pin, they are divided into a group. Compared with the wiring method in the prior art, one group of pressure sensing channels can reduce one pin entity, and multiple groups of pressure sensing channels can reduce multiple pin entities. On the one hand, the width of the flexible circuit board can be reduced. On the other hand, the difficulty of the bonding operation can be reduced, thereby improving the preparation yield of the pressure sensing module.

[0068] In any of the above embodiments, preferably, the substrate 202 is a polyester plastic carrier, a cycloolefin plastic carrier, or a glass carrier.

[0069] In this embodiment, the polyester plastic carrier, the cycloolefin plastic carrier or the glass carrier are all non-conductive optical plastics. By setting the substrate 202 to a polyester plastic carrier, the cycloolefin plastic carrier or the glass carrier, the folding resistance, high temperature resistance and transparency of the substrate 202 can be improved, which is beneficial to improving the structural reliability of the pressure sensing module.

[0070] According to an embodiment of the present invention, a touch display screen 200 is provided, comprising: a deformable insulating cover plate, the front side of the insulating cover plate is used to detect the user's touch operation; and also comprising a pressure sensing module, the pressure sensing module is attached to the back side of the insulating cover plate, and the pressure sensing module determines the corresponding touch instruction according to the touch operation.

[0071] In this embodiment, by attaching the above-mentioned pressure sensing module (Touch Sensor) to the back side of the insulating cover glass (CG), the accuracy of the touch display screen 200 in detecting touch commands is improved without increasing the hardware cost of the touch display screen 200, which is conducive to mass production and market promotion.

[0072] The insulating cover plate may be made of hard plastic, tempered glass, sapphire glass or other tempered hard plates.

[0073] According to an embodiment of the present invention, a touch-controlled electronic device is provided, including: the above-mentioned touch display screen 200, and the touch-controlled electronic device is one of a mobile phone, a tablet computer, a notebook, a display, a television, and a wearable smart device.

[0074] The technical scheme of the present invention is described in detail above in conjunction with the accompanying drawings. The present invention proposes a pressure sensing module, a touch display screen and a touch display device. By connecting one end of any two pressure sensing channels to the same pin respectively, on the one hand, compared with the connection method in the prior art in which the first pressure sensing channel and the second pressure sensing channel are respectively connected to two different pins, the number of pins is reduced and the operating difficulty of the bonding process is reduced. On the other hand, compared with the scheme in the prior art in which only the pressure sensing value of the first pressure sensing channel and the pressure sensing value of the second pressure sensing channel are collected, the first pressure channel can be connected to the second pressure channel to collect the pressure sensing values ​​at both ends of the first pressure channel and the second pressure channel, so that the pressure sensing values ​​are richer, the results calculated according to the pressure sensing values ​​are more accurate, and the corresponding pressure sensing sensitivity is higher, thereby improving the user experience.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pressure sensing module, characterized in that: include: substrate; A plurality of pressure sensing channels distributed in an array are arranged on the substrate, Wherein, any two pressure sensing channels among the plurality of pressure sensing channels are respectively a first pressure sensing channel and a second pressure sensing channel, one end of the first pressure sensing channel and one end of the second pressure sensing channel are respectively connected to the same pin, the other ends of the first pressure sensing channel and the second pressure sensing channel are respectively connected to other two different pins, the first pressure sensing channel and the second pressure sensing channel are adjacently arranged, the first end of the first pressure sensing channel is connected to the first pin, the second end of the first pressure sensing channel is connected to the second pin, the first end of the second pressure sensing channel is connected to the second pin, and the second end of the second pressure sensing channel is connected to the third pin, so that the first pressure sensing channel and the second pressure sensing channel are connected; A pressure sensing chip, wherein the pressure sensing chip comprises a Wheatstone bridge circuit, wherein the first pin, the second pin and the third pin are respectively connected to the Wheatstone bridge circuit; Wherein, after the substrate is touched, the resistance change between the first pin and the second pin, the resistance change between the second pin and the third pin, and the resistance change between the first pin and the third pin are respectively generated by detecting the Wheatstone bridge circuit.

2. The pressure sensing module according to claim 1, characterized in that: The pressure sensing channel is any one of a resistive sensing channel, a capacitive sensing channel and a piezoelectric film sensing channel.

3. The pressure sensing module according to claim 1, characterized in that: The first pressure sensing channel and the second pressure sensing channel are arranged on the same side of the substrate, The first pressure sensing channel and the second pressure sensing channel are arranged side by side along the length direction of the substrate, or the first pressure sensing channel and the second pressure sensing channel are arranged side by side along the width direction of the substrate.

4. The pressure sensing module according to claim 1, characterized in that: The first pressure sensing channel and the second pressure sensing channel are symmetrically arranged relative to the substrate.

5. The pressure sensing module according to claim 2, characterized in that: When the pressure sensing channel is the resistive sensing channel, the first pressure sensing channel is formed by a piezoresistive line that is bent back and forth, and / or the second pressure sensing channel is formed by a piezoresistive line that is bent back and forth.

6. The pressure sensing module according to claim 5, characterized in that: The pressure sensing channel is connected to the pins through a plurality of transparent wires, and the plurality of transparent wires are arranged in parallel on the substrate. Among them, the varistor circuit is transparent, and its material is at least one of ITO, silver-doped ITO, nano silver wire, graphene, metal grid, and carbon nanotubes. The material of the wire is at least one of transparent ITO, nano silver wire, nano copper wire, metal grid, graphene, polyaniline, PEDOT or carbon nanotubes.

7. A touch display screen, characterized in that: include: A deformable insulating cover plate, the front side of which is used to detect a user's touch operation; The pressure sensing module according to any one of claims 1 to 6, wherein the pressure sensing module is attached to the back side of the insulating cover plate, and the pressure sensing module determines a corresponding touch instruction according to the touch operation.

8. A touch-controlled electronic device, characterized in that: include: The touch display screen as claimed in claim 7.

9. The touch-controlled electronic device according to claim 8, characterized in that: The touch-controlled electronic device is one of a mobile phone, a tablet computer, a notebook, a display, a television, and a wearable smart device.

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