Pressure-sensitive circuits, control methods and related devices

Abstract

This application provides a pressure-sensitive circuit, control method, and related apparatus, relating to the field of terminal technology. The circuit includes: a control unit and M rows * N columns of pressure-sensitive units; the resistance of each pressure-sensitive unit changes with the pressure applied to it; each pressure-sensitive unit includes a first terminal and a second terminal, the first terminals of any row of pressure-sensitive units are connected together, and the second terminals of any row of pressure-sensitive units are connected together; the control unit is used to select pressure-sensitive units by row and obtain the output voltage of each pressure-sensitive unit in the selected row; wherein the output voltage of the pressure-sensitive unit changes with the pressure applied to it. In this way, the electronic device can detect the output voltage of each pressure-sensitive unit in a multi-row, multi-column array and analyze the output voltage of all pressure-sensitive units to identify the pressure-applied unit. By using the position of the pressure-sensitive unit and its output voltage to achieve independent reporting of touch operations, touch functions such as single clicks and swipes are realized.

Description

Technical Field

[0001] This application relates to the field of terminal technology, and in particular to pressure-sensitive circuits, control methods and related devices. Background Technology

[0002] Wearable devices, mobile phones and other electronic devices achieve touch response on the display screen through capacitive sensing.

[0003] However, in underwater environments (such as swimming, underwater photography, etc.), wearable devices, mobile phones and other electronic devices cannot achieve touch response. Summary of the Invention

[0004] This application provides a pressure-sensitive circuit, control method, and related apparatus, applicable to the field of terminal technology. The electronic device has multiple rows and columns of pressure-sensitive units. The resistance of each pressure-sensitive unit changes with pressure. The electronic device can detect the output voltage of each pressure-sensitive unit and analyze the output voltage of all pressure-sensitive units to identify the pressure-affected unit. By using the position of the pressure-sensitive unit and its output voltage, independent reporting of touch operations is achieved, thereby enabling touch functions such as single clicks and swipes. The pressure-sensitive circuit can improve the waterproof and accidental touch prevention level of the electronic device, enabling normal touch control even under running water such as from a faucet; it can also enable full underwater operation, such as swimming and diving, to recognize touch and swipe operations; furthermore, it allows the electronic device to perform camera shooting and video recording functions in underwater environments, such as swimming and diving, enabling normal use of the electronic device without the need for an additional waterproof casing.

[0005] In a first aspect, embodiments of this application propose a pressure-sensitive circuit. The circuit includes: a control unit and M rows * N columns of pressure-sensitive units; the resistance of each pressure-sensitive unit changes with the pressure applied to it; each pressure-sensitive unit includes a first terminal and a second terminal, the first terminals of any row of pressure-sensitive units are connected in common, and the second terminals of any row of pressure-sensitive units are connected in common; the control unit is used to select pressure-sensitive units by row and obtain the output voltage of each pressure-sensitive unit in the selected row; wherein the output voltage of the pressure-sensitive unit changes with the pressure applied to it.

[0006] This design incorporates multiple rows and columns of pressure-sensitive units. By detecting and analyzing the output voltage of each unit, the pressure-sensitive unit receiving pressure is identified, and the touch operation is recognized based on its corresponding position. This pressure-sensitive circuit enhances the waterproof and accidental touch prevention capabilities of electronic devices, enabling normal touch operation even under running water such as from a faucet. It also allows for full underwater operation, such as swimming and diving, recognizing touch and swipe gestures. Furthermore, it enables electronic devices to perform camera functions and video recording in underwater environments, such as swimming and diving, without requiring an additional waterproof casing.

[0007] In one possible implementation, any pressure-sensitive unit includes: a first pressure-sensitive module and a first voltage divider module; a first terminal of the first pressure-sensitive module is the first terminal of the pressure-sensitive unit, and a second terminal of the first pressure-sensitive module is connected to the first terminal of the first voltage divider module, the second terminal of the first voltage divider module being the second terminal of the pressure-sensitive unit; the resistance of the first pressure-sensitive module changes with the applied pressure; the first voltage divider module and the first pressure-sensitive module are used to divide the voltage across the pressure-sensitive unit, so that the output voltage of the pressure-sensitive unit changes with the applied pressure.

[0008] The pressure-sensitive unit consists of two modules connected in series. Its structure is simple and it occupies a small area. This allows electronic devices to distribute more pressure-sensitive units, increasing the density of pressure-sensitive units and improving the accuracy of touch operation recognition.

[0009] In one possible implementation, the first pressure-sensitive module includes at least one piezoresistive resistor whose resistance changes with the applied pressure.

[0010] In this way, the output voltage can be changed by using a voltage transformer, which is simple in principle and easy to implement.

[0011] In one possible implementation, the resistance of the first voltage divider module changes with the applied pressure.

[0012] In this way, the first pressure divider module can also change according to pressure changes, thereby enhancing the pressure sensing unit's ability to detect pressure.

[0013] In one possible implementation, the pressure-sensitive unit further includes a support layer, which provides space for the pressure-sensitive module to deform, so that the pressure-sensitive module changes with the pressure applied to it.

[0014] In this way, the pressure-sensitive unit has a certain deformation space, which can deform with changes in pressure and thus change the resistance value.

[0015] In one possible implementation, the first pressure-sensitive module is located on one side of the support layer, and the first pressure-dividing module is located on the other side of the support layer.

[0016] In this way, the pressure-sensitive unit occupies a smaller projected area when stacked, and more pressure-sensitive units can be arranged within the same projected area, which improves the accuracy of the pressure-sensitive circuit in confirming the position of the touch operation and enhances the sensing effect of the pressure-sensitive circuit.

[0017] Furthermore, if the first pressure-sensitive module can change with the pressure it receives, the stacked distribution can further increase the pressure-sensitive unit's sensitivity to pressure, improve the sensitivity to touch operations, and enhance the sensing effect of the pressure-sensitive circuit.

[0018] In one possible implementation, the first pressure-sensitive module and the first pressure-dividing module are located on the same side of the support layer.

[0019] In this way, the planar distribution of the pressure-sensitive module and the voltage divider module can reduce the thickness of the pressure-sensitive unit, which is beneficial for the thinning and lightening of electronic devices. In addition, if the resistance of the first voltage divider module can change with the applied pressure, the pressure-sensing area of ​​the pressure-sensitive unit can be increased, improving the accuracy of the pressure-sensitive circuit in confirming the touch operation position and enhancing the sensing effect of the pressure-sensitive circuit.

[0020] In one possible implementation, the control unit includes: a first switch module and a first detection module; the first detection module is used to detect the output voltage of each pressure-sensitive unit in the selected row; the first switch module includes M first output terminals, a first input terminal, and a second input terminal, the M first output terminals are connected one-to-one with the first terminals of the M rows of pressure-sensitive units, the first input terminals are used to connect to a first voltage, and the second input terminals are used to connect to a second voltage, the first voltage and the second voltage being different; when the second terminal of the first voltage divider module is connected to the first voltage, the first switch module is used to control the M first output terminals to connect to the second input terminal in turn to achieve row-by-row selection of pressure-sensitive units; or, when the second terminal of the first voltage divider module is connected to the second voltage, the first switch module is used to control the M first output terminals to connect to the first input terminal in turn to achieve row-by-row selection of pressure-sensitive units.

[0021] In this way, the control unit selects a row of pressure-sensitive units by controlling the voltage changes at multiple first output terminals. The control method is simple and easy to implement.

[0022] In one possible implementation, the second terminals of any column of first pressure-sensitive modules are connected together; the first detection module includes: N analog-to-digital converters; the N analog-to-digital converters are connected one-to-one with the second terminals of the N columns of first pressure-sensitive modules; the N analog-to-digital converters are used to detect the output voltage of each pressure-sensitive unit in the selected row.

[0023] In this way, each row of pressure-sensitive units shares a single analog-to-digital converter (ADC) for detection, reducing the number of ADCs required and lowering the cost and footprint of the pressure-sensitive circuit. Furthermore, the ADC's method of detecting the output voltage is simple and easy to implement.

[0024] In one possible implementation, the pressure-sensitive unit is located on one side of the display screen to detect pressure applied by the user on the other side. This placement of the pressure-sensitive unit at the display screen enables the recognition of touch operations on the screen.

[0025] Secondly, embodiments of this application propose a pressure-sensitive circuit. The circuit includes: a control unit and M rows * N columns of pressure-sensitive units; the resistance of each pressure-sensitive unit changes with the pressure applied to it; each pressure-sensitive unit includes a first terminal and a second terminal, the first terminals of pressure-sensitive units in any row are connected together, and the second terminals of pressure-sensitive units in any column are connected together; the control unit is used to select pressure-sensitive units by row and obtain the output voltage of each pressure-sensitive unit in the selected row, or to select pressure-sensitive units one by one and obtain the output voltage of the selected pressure-sensitive unit; wherein the output voltage of the pressure-sensitive unit changes with the pressure applied to it.

[0026] In this way, multiple rows and columns of pressure-sensitive units are set up. By detecting the output voltage of each pressure-sensitive unit and analyzing the output voltage of all pressure-sensitive units, the pressure-sensitive unit being subjected to pressure is identified, and then the touch operation is recognized based on the position of the corresponding pressure-sensitive unit.

[0027] In one possible implementation, the pressure-sensitive circuit further includes: a second voltage divider module; each pressure-sensitive unit includes: a second pressure-sensitive module; the control unit includes: a second switch module and a second detection module; the second detection module is used to detect the output voltage of the selected pressure-sensitive unit; the second switch module includes M first output terminals, N second output terminals, a first input terminal, a second input terminal, a third input terminal, and a fourth input terminal, the M first output terminals are connected one-to-one with the first terminals of the M rows of pressure-sensitive units, the N second output terminals are connected one-to-one with the second terminals of the N columns of pressure-sensitive units, the first input terminals are used to connect to a first voltage, and the second input terminals are used to connect to a second voltage; the first voltage and the second voltage are different; the second switch module is used to control the M first output terminals to connect to the first input terminals in turn, and to control the N second output terminals to connect to the third input terminal, so as to select the pressure-sensitive units one by one.

[0028] The third input terminal is connected to one end of the second voltage divider module, the other end of the second voltage divider module is connected to the first voltage, and the fourth input terminal is used to connect to the second voltage; the second switch module is used to control M first output terminals to connect to the second input terminal in turn, and N second output terminals to connect to the fourth input terminal in turn, so as to select the pressure sensing unit one by one; or, the third input terminal is used to connect to the first voltage, the fourth input terminal is connected to one end of the second voltage divider module, and the other end of the second voltage divider module is connected to the second voltage; the second switch module is used to control M first output terminals to connect to the first input terminal in turn, and N second output terminals to connect to the third input terminal in turn, so as to select the pressure sensing unit one by one.

[0029] By having multiple pressure-sensitive units share a voltage divider module, the number of voltage divider modules in the pressure-sensitive circuit can be reduced, thus lowering the cost and footprint of the pressure-sensitive circuit. This allows for the distribution of more pressure-sensitive units in the electronic device, increasing the density of pressure-sensitive units and improving the accuracy of touch operation recognition.

[0030] In one possible implementation, the second pressure-sensitive module includes at least one piezoresistive resistor whose resistance changes with the applied pressure.

[0031] In this way, the output voltage can be changed by using a voltage transformer, which is simple in principle and easy to implement.

[0032] In one possible implementation, the second switch module includes: M first switches and N second switches; each first switch includes: one output terminal and two input terminals; the output terminals of the M first switches are connected one-to-one with the first terminals of the M rows of pressure-sensitive units; one input terminal of the M first switches is connected to a first voltage, and the other input terminal of the M first switches is connected to a second voltage; each second switch includes: one output terminal and two input terminals; the output terminals of the N second switches are connected one-to-one with the second terminals of the N columns of pressure-sensitive units; one input terminal of the N second switches is connected to the first voltage, and the other input terminal of the N second switches is connected to one end of the second voltage divider module, and the other end of the second voltage divider module is connected to the second voltage; or, one input terminal of the N second switches is connected to the second voltage, and the other input terminal of the N second switches is connected to one end of the second voltage divider module, and the other end of the second voltage divider module is connected to the first voltage.

[0033] In this way, the control unit selects the pressure-sensitive units one by one by controlling the voltage changes of multiple first output terminals and second output terminals. The control method is simple and easy to implement.

[0034] In one possible implementation, the control unit further includes a matrix controller; the matrix controller is used to control the switching connection of M first output terminals and N second output terminals to achieve sequential selection of pressure-sensitive units.

[0035] This allows for the selection of each pressure-sensitive unit individually.

[0036] In one possible implementation, the pressure-sensitive circuit includes: a second voltage divider module; the second detection module includes: an analog-to-digital converter; the analog-to-digital converter is connected to one end of the second voltage divider module; the analog-to-digital converter is used to detect the output voltage of each pressure-sensitive unit in the selected row.

[0037] In this way, multiple pressure-sensing units share a single second voltage divider module, and multiple pressure-sensing units share a single analog-to-digital converter (ADC) for output voltage detection. The reduced number of voltage divider modules and ADCs in the pressure-sensing circuit results in lower cost and smaller footprint. Furthermore, the ADC's output voltage detection method is simple and easy to implement.

[0038] In one possible implementation, the pressure-sensitive circuit includes: N second voltage divider modules; the switching unit includes: N third input terminals or N fourth input terminals; one end of each of the N second voltage divider modules is connected to one of the N third input terminals, or one end of each of the N second voltage divider modules is connected to one of the N fourth input terminals; the second detection module includes: N analog-to-digital converters; the N analog-to-digital converters are connected to one of the N second voltage divider modules; the N analog-to-digital converters are used to detect the output voltage of the selected pressure-sensitive unit.

[0039] In this way, each row of pressure-sensitive units shares a second voltage divider module, and each row of pressure-sensitive units shares an analog-to-digital converter (ADC) for output voltage detection. The reduced number of voltage divider modules and ADCs in the pressure-sensitive circuit results in lower cost and smaller footprint. Furthermore, the ADC's output voltage detection method is simple and easy to implement.

[0040] In one possible implementation, the pressure-sensitive circuit further includes: N third voltage divider modules; each pressure-sensitive unit includes: a third pressure-sensitive module; the first terminals of the N third voltage divider modules are connected to the second terminals of the N column pressure-sensitive units; the second terminals of the third voltage divider modules are connected to a first voltage or a second voltage; the control unit includes: a third switch module and a third detection module; the third detection module is used to obtain the output voltage of each pressure-sensitive unit in the selected row; the third switch module includes M first output terminals, a first input terminal, and a second input terminal, the M first output terminals are connected one-to-one with the first terminals of the M row pressure-sensitive units, the first input terminals are used to connect to the first voltage, and the second input terminals are used to connect to the second voltage; the first voltage and the second voltage are different.

[0041] When the first voltage is connected to the second terminal of the third voltage divider module, the third switch module is used to control the M first output terminals to connect to the second input terminal in turn, so as to realize the selection of pressure sensing units by row; or, when the second voltage is connected to the second terminal of the third voltage divider module, the third switch module is used to control the M first output terminals to connect to the first input terminal in turn, so as to realize the selection of pressure sensing units by row.

[0042] By having multiple pressure-sensitive units share a voltage divider module, the number of voltage divider modules in the pressure-sensitive circuit can be reduced, thus lowering the cost and footprint of the pressure-sensitive circuit. This allows for the distribution of more pressure-sensitive units in the electronic device, increasing the density of pressure-sensitive units and improving the accuracy of touch operation recognition.

[0043] In one possible implementation, the third pressure-sensitive module includes at least one piezoresistive resistor whose resistance changes with the applied pressure.

[0044] In this way, the output voltage can be changed by using a voltage transformer, which is simple in principle and easy to implement.

[0045] In one possible implementation, the pressure-sensitive unit is located on one side of the display screen to detect pressure applied by the user on the other side. This placement of the pressure-sensitive unit at the display screen enables the recognition of touch operations on the screen.

[0046] Fourthly, embodiments of this application provide a circuit board, the circuit board including: a pressure-sensitive unit as described in the first aspect or any possible implementation of the first aspect; or, the circuit board including: a pressure-sensitive unit as described in the second aspect or any possible implementation of the second aspect.

[0047] Fifthly, embodiments of this application provide a chip, the chip including: a control unit described in the first aspect or any possible implementation of the first aspect; or, the chip including: a control unit described in the second aspect or any possible implementation of the second aspect.

[0048] In a sixth aspect, embodiments of this application provide an electronic device, which includes: a pressure-sensitive unit and a control unit as described in the first aspect or any possible implementation of the first aspect; or, the electronic device includes: a pressure-sensitive unit and a control unit as described in the second aspect or any possible implementation of the second aspect.

[0049] Seventhly, embodiments of this application provide a control method. The method includes: a control unit selecting pressure-sensitive units row by row;

[0050] The control unit obtains the output voltage of each pressure-sensitive unit in the selected row and transmits the output voltage of the pressure-sensitive unit to the processor; the processor recognizes the touch operation based on the output voltage of the pressure-sensitive unit.

[0051] In one possible implementation, the control unit selects pressure-sensitive units row by row, including: when a second voltage is connected to the second terminal of the first voltage divider module, the control unit controls M first output terminals to connect to the second input terminal in turn to achieve row-by-row selection of pressure-sensitive units; or, when a second voltage is connected to the second terminal of the first voltage divider module, the control unit controls M first output terminals to connect to the first input terminal in turn to achieve row-by-row selection of pressure-sensitive units.

[0052] Eighthly, embodiments of this application provide a control method. The method includes: a control unit selecting pressure-sensitive units one by one; the control unit obtaining the output voltage of the selected pressure-sensitive unit and transmitting the output voltage of the pressure-sensitive unit to a processor; and the processor recognizing a touch operation based on the output voltage of the pressure-sensitive unit.

[0053] In one possible implementation, the control unit selects pressure-sensitive units one by one, including: when a first voltage is connected to the second terminal of the first voltage divider module, the control unit controls M first output terminals to connect to the second input terminal in turn, and N second output terminals to connect to the fourth input terminal in turn, so as to select pressure-sensitive units one by one; or, when a second voltage is connected to the second terminal of the first voltage divider module, the control unit controls M first output terminals to connect to the first input terminal in turn, and N second output terminals to connect to the third input terminal in turn, so as to select pressure-sensitive units one by one.

[0054] Ninthly, embodiments of this application provide an electronic device including a processor and a memory, the memory for storing code instructions, and the processor for running the code instructions to perform the methods described in the seventh aspect or any possible implementation of the seventh aspect, or to perform the methods described in the eighth aspect or any possible implementation of the seventh aspect.

[0055] In a tenth aspect, embodiments of this application provide a computer-readable storage medium storing a computer program or instructions that, when executed on a computer, cause the computer to perform the method described in the seventh aspect or any possible implementation thereof, or to perform the method described in the eighth aspect or any possible implementation thereof.

[0056] In the eleventh aspect, embodiments of this application provide a computer program product including a computer program, which, when run on a computer, causes the computer to perform the method described in the seventh aspect or any possible implementation thereof, or to perform the method described in the eighth aspect or any possible implementation thereof.

[0057] In a twelfth aspect, this application provides a chip or chip system including at least one processor and a communication interface. The communication interface and the at least one processor are interconnected via a circuit. The at least one processor is used to run a computer program or instructions to perform the methods described in the seventh aspect or any possible implementation thereof, or to perform the methods described in the eighth aspect or any possible implementation thereof. The communication interface in the chip can be an input / output interface, a pin, or a circuit, etc.

[0058] In one possible implementation, the chip or chip system described above in this application further includes at least one memory storing instructions. The memory can be an internal storage unit of the chip, such as a register or cache, or it can be a storage unit of the chip itself (e.g., read-only memory, random access memory, etc.).

[0059] It should be understood that the third to twelfth aspects of this application correspond to the technical solutions of the first aspect or the second aspect of this application, and the beneficial effects obtained by each aspect and the corresponding feasible implementation are similar, and will not be repeated here. Attached Figure Description

[0060] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0061] Figure 2 This is a schematic diagram of a pressure-sensitive circuit provided in an embodiment of this application;

[0062] Figure 3 This is a schematic diagram of the structure of a pressure-sensitive unit provided in an embodiment of this application;

[0063] Figure 4 This is a schematic diagram of the structure of a pressure-sensitive unit provided in an embodiment of this application;

[0064] Figure 5 This is a schematic diagram of a pressure-sensitive circuit provided in an embodiment of this application;

[0065] Figure 6 This is a schematic diagram of the structure of a pressure-sensitive unit provided in an embodiment of this application;

[0066] Figure 7This is a schematic diagram of a pressure-sensitive circuit provided in an embodiment of this application;

[0067] Figure 8 This is a schematic diagram of a pressure-sensitive circuit provided in an embodiment of this application;

[0068] Figure 9 This is a schematic diagram of the structure of a control unit provided in an embodiment of this application;

[0069] Figure 10 This is a schematic diagram of a pressure-sensitive circuit provided in an embodiment of this application;

[0070] Figure 11 A flowchart illustrating a control method provided in an embodiment of this application;

[0071] Figure 12 This is a flowchart illustrating a control method provided in an embodiment of this application. Detailed Implementation

[0072] To facilitate a clear description of the technical solutions in the embodiments of this application, some terms and technologies involved in the embodiments of this application will be briefly introduced below:

[0073] 1. Other terms

[0074] In the embodiments of this application, terms such as "first" and "second" are used to distinguish identical or similar items with substantially the same function and purpose. For example, "first chip" and "second chip" are used only to distinguish different chips and do not limit their order of execution. Those skilled in the art will understand that terms such as "first" and "second" do not limit the quantity or execution order, and that "first" and "second" do not necessarily imply that they are different.

[0075] It should be noted that, in the embodiments of this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0076] In this application embodiment, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, a--c, bc, or abc, where a, b, and c can be single or multiple.

[0077] 2. Electronic equipment

[0078] The electronic devices in this application embodiment may include handheld devices with touch functionality, in-vehicle devices, etc. For example, some electronic devices include: mobile phones, tablet computers, PDAs, laptops, mobile internet devices (MIDs), wearable devices (e.g., smartwatches, smart glasses, smart bracelets, or smart jewelry), virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, and personal digital assistants (PDAs). The embodiments of this application do not limit this to personal assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to a wireless modem, vehicle-mounted devices, terminal devices in 5G networks or terminal devices in future evolved public land mobile networks (PLMNs).

[0079] The electronic devices in the embodiments of this application may also be referred to as: terminal equipment, user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent, or user device, etc.

[0080] In this embodiment, the electronic device or various network devices include a hardware layer, an operating system layer running on top of the hardware layer, and an application layer running on top of the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also called main memory). The operating system can be any one or more computer operating systems that implement business processing through processes, such as Linux, Unix, Android, iOS, or Windows. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software.

[0081] Mobile phones and other electronic devices use capacitive sensing to recognize touch operations such as pressing and swiping.

[0082] However, in an underwater environment, electronic devices cannot recognize touch operations such as pressing and swiping. This is because underwater, both the water and the person can be considered conductors, causing capacitive sensing to fail, and thus the electronic device cannot recognize the touch operation.

[0083] Currently, pressure sensors in electronic devices can be calibrated and pressure magnitude identified using coordinate information provided by capacitive touch. However, pressure sensors alone cannot be used to achieve position positioning for touch operations.

[0084] One possible design involves a pressure sensor in an electronic device that uses the Wheatstone bridge principle to sense pressure. This pressure sensor consists of four resistors. The resistance of the piezoresistive transformer is measured using three resistors with known resistance values. This testing method requires detecting the voltage at at least two locations to measure the resistance of the piezoresistive transformer, thereby allowing the measurement of the pressure applied to it.

[0085] Understandably, a pressure sensor composed of four resistors is relatively large and thick. If many such pressure sensors are distributed, it will increase the size and cost of the electronic device, hindering its pursuit of thinner and lighter designs and lower costs. Furthermore, the number of channels for reading the chip in the electronic device, and the fact that pressure sensors that use the Wheatstone bridge principle to sense pressure require detecting voltage at two locations necessitates a double-layer wiring layout, making the wiring complex.

[0086] In view of this, embodiments of this application provide a pressure-sensitive circuit, a control method, and related devices. The electronic device has multiple rows and columns of pressure-sensitive units. The resistance of each pressure-sensitive unit changes with pressure. The electronic device can detect the output voltage of each pressure-sensitive unit and analyze the output voltages of all pressure-sensitive units to identify the pressure-bearing unit. By using the position of the pressure-sensitive unit and its output voltage to independently report touch operation points, touch functions such as single clicks and swipes are achieved.

[0087] Pressure-sensitive circuits can enhance the waterproof and accidental touch prevention levels of electronic devices, enabling normal touch control even under running water such as from faucets. They can also enable full underwater operation, such as swimming and diving, to recognize touch and swipe operations on electronic devices. Furthermore, they allow electronic devices to perform functions such as camera shooting and video recording in underwater environments, such as swimming and diving, enabling normal use of electronic devices without the need for an additional waterproof casing.

[0088] In some embodiments, the pressure-sensitive unit is identified by comparing its output voltage with a preset value, thereby enabling the recognition of touch operations.

[0089] Specifically, without touch operation, the pressure-sensitive units are not subjected to touch pressure, their resistance remains unchanged, and their output voltage is the same as or close to the preset value. With touch operation, some pressure-sensitive units sense the touch pressure, causing their resistance to change, resulting in a significant difference in their output voltage from the preset value. Other pressure-sensitive units are not subjected to touch pressure, their resistance remains unchanged, and their output voltage is the same as or close to the preset value. The location of the pressure-sensitive unit with the largest difference in output voltage from the preset value corresponds to the location of the touch operation.

[0090] In other embodiments, the recognition of touch operation is achieved by comparing the output voltages of multiple pressure-sensitive units to confirm whether the pressure-sensitive unit senses pressure.

[0091] Specifically, without touch operation, the pressure-sensitive units are not subjected to touch pressure, their resistance remains unchanged, and the output voltages of all pressure-sensitive units are the same or similar. With touch operation, some pressure-sensitive units sense the touch pressure, causing their resistance to change, which in turn changes the output voltage of those units; other pressure-sensitive units are not subjected to touch pressure, their resistance remains unchanged, and their output voltages are the same or similar.

[0092] Understandably, in some embodiments, the area corresponding to touch operation is smaller compared to the display screen. Therefore, the electronic device can statistically analyze the output voltage of each pressure-sensitive unit, and the location corresponding to the pressure-sensitive unit whose output voltage value occurs less frequently is the location of the touch operation.

[0093] The pressure-sensitive circuit provided in this application embodiment can be applied to electronic devices. For ease of understanding, the structure of the electronic device is described below. For example, Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0094] like Figure 1 As shown, the electronic device includes a display screen 10 and a back cover 20. A mid-frame 30, a pressure-sensitive circuit 40, and a battery 50 can be disposed between the display screen 10 and the back cover 20. The pressure-sensitive circuit 40 can be disposed on the side of the mid-frame 30 facing the display screen 10, and the pressure-sensitive circuit 40 can detect the pressure of touch operations such as clicking and swiping on the display screen.

[0095] The pressure-sensitive circuit 40 is used to detect touch operations on the display screen 10. In this embodiment, the pressure-sensitive circuit 40 includes a plurality of pressure-sensitive units and a control unit. The resistance of the pressure-sensitive unit changes with the pressure applied to it. The control unit can detect the output voltage of each pressure-sensitive unit. The electronic device can determine whether the pressure-sensitive unit has sensed pressure based on the output voltage of each pressure-sensitive unit, thereby realizing the recognition of touch operations.

[0096] The structure of the pressure-sensitive circuit 40 can be referred to in the corresponding description below, and will not be repeated here.

[0097] In this embodiment, the pressure-sensitive unit in the pressure-sensitive circuit 40 can be attached to one side of the display screen to detect user touch operations on the other side of the display screen. This way, the pressure-sensitive unit does not directly contact the display screen, reducing crosstalk between pressure sensing signals, touch signals, and display signals, and lowering system redundancy.

[0098] The pressure-sensitive unit in the pressure-sensitive circuit 40 can also be integrated into the driving panel of the display screen. This can further reduce the thickness of the electronic device, which is beneficial for making the electronic device thinner and lighter.

[0099] In this embodiment, the pressure-sensitive circuit 40 may also be located in the electronic device at a location where touch sensing is required; no specific limitation is made here.

[0100] The battery 50 can be disposed on the middle frame 30, for example, on the side of the middle frame 30 facing the rear cover 20; in other embodiments, the battery 50 can also be disposed on the side of the middle frame 30 facing the display screen 10. No specific limitation is made here.

[0101] The battery 50 can provide power to the pressure-sensitive circuit 40, the display screen 10, the processor (not shown), the internal memory (not shown), the external memory (not shown), the camera assembly (not shown), and the communication module (not shown).

[0102] In this embodiment, the display screen 10 can be an organic light-emitting diode (OLED) display screen or a liquid crystal display (LCD). It should be understood that the display screen 10 may include a monitor and a touch device, the monitor being used to output display content to the user, and the touch device being used to receive touch events input by the user on the display screen 10.

[0103] The back cover 20 can be a metal back cover, a glass back cover, a plastic back cover, or a ceramic back cover. In this embodiment, the material of the back cover is not limited.

[0104] The middle frame 30 may include a metal plate 31 and a frame. The frame surrounds the outer edge of the metal plate 31. For example, the frame may include a top frame 32 and a bottom frame 33 disposed opposite each other, and a left frame 34 and a right frame 35 disposed opposite each other between the top frame 32 and the bottom frame 33. The metal plate 31 may be an aluminum plate, an aluminum alloy, or a magnesium alloy. The frames may be metal frames, ceramic frames, or glass frames. The metal middle frame 30 and the frame may be connected by welding, snap-fitting, or integral molding, or the metal middle frame 30 and the frame may be connected by injection molding of plastic parts.

[0105] like Figure 1 As shown, the electronic device may also include: a camera assembly and a flash (not shown), the camera assembly may include a front camera assembly 61 and a rear camera assembly 62.

[0106] It should be noted that, Figure 1 The electronic device structure shown does not constitute a limitation on the electronic device and may include more or fewer components than shown, or combine certain components, or have different component arrangements, different shapes, etc.

[0107] The technical solution of this application and how it solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be implemented independently or in combination with each other. The same or similar concepts or processes may not be described again in some embodiments.

[0108] Figures 2 to 5 The pressure-sensitive circuit shown corresponds to the case where the control unit selects a pressure-sensitive unit row by row. Figures 6 to 8 The pressure-sensitive circuit shown corresponds to the case where the control unit selects pressure-sensitive units one by one. The pressure-sensitive circuit involved in the embodiments of this application will be described below with reference to the accompanying drawings.

[0109] For example, Figure 2 This is a schematic diagram of a pressure-sensitive circuit provided in an embodiment of this application. Figure 2 As shown, the pressure-sensitive circuit includes: M rows * N columns of pressure-sensitive units 201, a control unit 202, M first traces 203, one second trace 204, and N third traces 205. The M first traces 203 correspond one-to-one with the M rows of pressure-sensitive units 201. The N third traces 205 correspond one-to-one with the N columns of pressure-sensitive units 201. In this embodiment,

[0110] like Figure 2 As shown, each pressure-sensitive unit 201 includes a first terminal 1a, a second terminal 1b, and a third terminal 1c. The first terminal 1a of any row of pressure-sensitive units 201 is connected together via a first trace 203, which is connected to the control unit 202. The second terminal 1b of any row of pressure-sensitive units 201 is connected together via a second trace 204; the third terminal 1c of any column of pressure-sensitive units 201 is connected together via a third trace 205, which is connected to the control unit 202.

[0111] Line 1 203 and line 2 204 are used to form a loop with each pressure-sensitive unit in the selected row; line 3 205 is used to transmit the output voltage of each pressure-sensitive unit 201 in the selected row, so that the control unit 202 can detect the output voltage of the pressure-sensitive unit 201 in that row. There can be multiple lines 204 or one line 204, which is not specifically limited here.

[0112] In this embodiment, the resistance of the pressure-sensitive unit 201 changes with the pressure applied to the pressure-sensitive unit 201. For example, the resistance of the pressure-sensitive unit 201 may increase as the pressure applied to the pressure-sensitive unit 201 increases; the resistance of the pressure-sensitive unit 201 may decrease as the pressure applied to the pressure-sensitive unit 201 increases, and no specific limitation is made here.

[0113] Figure 2In the circuit shown, the pressure-sensitive unit 201 may include a pressure-sensitive module and a voltage divider module. The pressure-sensitive module and the voltage divider module are connected in series. The resistance of the pressure-sensitive module changes with the pressure applied to the pressure-sensitive unit 201. The pressure-sensitive module includes at least one piezoresistive resistor. The resistance of the piezoresistive resistor changes with the applied pressure.

[0114] The resistance of the voltage divider module may or may not change with the pressure applied to the pressure sensing unit 201; no specific limitation is made here. The voltage divider module includes at least one resistor, which may or may not be a voltage-varying resistor; no specific limitation is made here.

[0115] For example, taking a pressure-sensitive module including resistor A and a voltage divider module including resistor B as an example, such as... Figure 3 As shown, the pressure-sensitive unit includes resistor A and resistor B. One end of resistor A is the first terminal 1a of the pressure-sensitive unit, and the other end of resistor A is connected to one end of resistor B. The other end of resistor B is the second terminal 1b of the pressure-sensitive unit, and the other end of resistor A is the third terminal 1c of the pressure-sensitive unit. The resistance of resistor A changes with the applied pressure. The resistance of resistor B may or may not change with the applied pressure. No specific limitation is made here.

[0116] In some embodiments, the pressure-sensitive module and the pressure-dividing module are stacked (e.g., Figure 4 (as shown in a).

[0117] In this way, the pressure-sensitive units occupy a smaller projected area when stacked, allowing for the arrangement of more pressure-sensitive units within the same projected area. This improves the accuracy of the pressure-sensitive circuit in confirming the touch operation position and enhances the sensing effect of the pressure-sensitive circuit.

[0118] Furthermore, if the resistance of the voltage divider module can change with the applied pressure, the stacked distribution can increase the pressure sensing unit's sensitivity to pressure, improve the sensitivity to touch operation, and enhance the sensing effect of the pressure sensing circuit.

[0119] In other embodiments, the pressure-sensitive module and the pressure-dividing module are planar distributed (e.g., Figure 4 (as shown in b).

[0120] In this way, the planar distribution of the pressure-sensitive module and the voltage divider module can reduce the thickness of the pressure-sensitive unit, which is beneficial for the thinner and lighter design of electronic devices. In addition, if the resistance of the voltage divider module can change with the applied pressure, the pressure-sensing area of ​​the pressure-sensitive unit can be increased, improving the accuracy of the pressure-sensitive circuit in confirming the touch operation position and enhancing the sensing effect of the pressure-sensitive circuit.

[0121] Based on the above embodiments, the pressure-sensitive unit 201 further includes a support layer. The support layer provides space for the pressure-sensitive module to deform. In this way, the pressure-sensitive unit has a certain deformation space, and can deform with changes in pressure to change the resistance value.

[0122] In this embodiment, the support layer can be composed of materials such as sponge or foam; alternatively, the support layer can be unused, leaving space for the pressure-sensitive module to suspend. The support layer can be located between the pressure-sensitive module and the pressure-dividing module (e.g., Figure 4 (As shown in a). The support layer can also be located on the same side of the pressure-sensitive module and the voltage divider module (e.g., as shown in a). Figure 4 (as shown in b).

[0123] Figure 2 In the circuit shown, the control unit 202 is used to select pressure sensing units 201 by row and obtain the output voltage of each pressure sensing unit 201 in the selected row.

[0124] In some embodiments, the control unit 202 can select a row of pressure-sensitive units 201 sequentially. For example, the control unit 202 can first select the first row of pressure-sensitive units 201 and obtain the output voltage of the first row of pressure-sensitive units 201. After obtaining the output voltage of the first row of pressure-sensitive units 201, the control unit selects the second row of pressure-sensitive units 201 and obtains the output voltage of the second row of pressure-sensitive units 201. The control unit can select a row of pressure-sensitive units 201 sequentially until it obtains the output voltage of the last row of pressure-sensitive units 201.

[0125] In other embodiments, the control unit 202 may also randomly select a row of pressure-sensitive units 201 and obtain the output voltage of each pressure-sensitive unit 201 in the selected row. The control unit 202 then selects a row of pressure-sensitive units 201 from the remaining row or more rows of pressure-sensitive units 201 and obtains the output voltage of each pressure-sensitive unit 201 in the selected row.

[0126] Figure 2 In the circuit shown, the control unit 202 can control the selection of pressure sensing units 201 by controlling the voltage of control trace 203. Specifically, the control unit 202 can control the selection of pressure sensing units 201 in a row by controlling the voltage of the trace 203 corresponding to each row of pressure sensing units 201.

[0127] In one possible implementation, taking grounding trace 204 as an example, when the voltage of trace 1 203 is high, the row of pressure-sensitive units 201 corresponding to trace 1 203 is selected; when the voltage of trace 1 203 is low, the row of pressure-sensitive units 201 corresponding to trace 1 203 is not selected. For example, taking the selection of the first row of pressure-sensitive units as an example, the control unit 202 can control the voltage of trace 1 203 corresponding to the first row of pressure-sensitive units 201 to be high, and control the voltage of trace 1 203 corresponding to the second to last row of pressure-sensitive units 201 to be low.

[0128] In this way, the pressure sensing units of the unselected rows remain at a low level, which can reset and calibrate the output voltage of the unselected pressure sensing units, reduce crosstalk at the voltage detection points of the pressure sensing units, and improve anti-interference capability.

[0129] In a possible implementation, taking a high-level voltage at trace 204 as an example, when the voltage at trace 1 203 is low, the row of pressure-sensitive units 201 corresponding to trace 1 203 is selected; when the voltage at trace 1 203 is high, the row of pressure-sensitive units 201 corresponding to trace 1 203 is not selected. For example, taking the selection of the first row of pressure-sensitive units as an example, the control unit 202 can control the voltage at trace 1 203 corresponding to the first row of pressure-sensitive units 201 to be low, and control the voltage at trace 1 203 corresponding to the second to last row of pressure-sensitive units 201 to be high.

[0130] The structure of the control unit 202 is described below.

[0131] like Figure 2 As shown, the control unit 202 includes: M switches 221 and N analog-to-digital converters (ADCs) 222. The M switches 221 correspond one-to-one with the M traces 203, and the N ADCs 222 correspond one-to-one with the N traces 205.

[0132] Each switch 221 includes: one output terminal and two input terminals. See also Figure 2 The output terminal 2a of switch 221 is connected to trace 203. The input terminal 2b of switch 221 is used to input the first voltage VRH, and the input terminal 2c of switch 221 is used to input the second voltage VRL. The first voltage and the second voltage are different. For example, the first voltage is a high level, and the second voltage is a low level. The specific values ​​of the first voltage and the second voltage are not limited in this embodiment.

[0133] The control unit 202 can control the voltage of the wiring 203 corresponding to each row of pressure-sensitive units 201 by controlling the M switches 221, thereby controlling whether the pressure-sensitive unit 201 is selected or not.

[0134] The control unit 202 can detect the output voltage of the selected pressure sensing unit through N ADCs.

[0135] For example, taking the selection of the first row of pressure-sensitive units 201 as an example, the control unit 202 can control the output terminal 2a and input terminal 2b of the switch 221 corresponding to the first row of pressure-sensitive units 201 to connect to a first voltage; the control unit 202 can control the output terminal 2a and input terminal 2c of the switches 221 corresponding to the second to Mth rows of pressure-sensitive units 201 to connect to a second voltage. In this way, the first row of pressure-sensitive units 201 can be selected, and the output voltage of the first row of pressure-sensitive units 201 can be obtained.

[0136] It is understandable that the above Figure 2 In the illustrated embodiment, the selection of the pressure-sensitive unit is achieved through M switches 221. The M switches 221 can also be replaced by one or more switches. For example, taking a single switch as an example, this switch may include M output terminals and 2 input terminals. The M output terminals are connected one-to-one with the M traces 203, and the two input terminals are used to connect to a first voltage and a second voltage, respectively. Alternatively, the M switches 221 can be understood as a structure of a switch module, which can also be replaced by other structures, such as one or more switches. No specific limitations are imposed here.

[0137] The above Figure 2 In the illustrated embodiment, the output voltage of the pressure sensing unit 201 is detected using an ADC 222. The ADC 222 can also be replaced with any voltage detection structure. For example, a voltmeter can be used to detect the output voltage of the pressure sensing unit 201; the output voltage of the pressure sensing unit 201 can be detected against a preset value by controlling the conduction of a switching transistor. Alternatively, it can be understood that N ADCs 222s form one structure for the detection module, and the detection module can be replaced with other structures, such as N voltmeters. No specific limitations are made here.

[0138] In this way, the pressure-sensitive unit consists of two modules connected in series. The pressure sensitivity is determined by detecting the voltage at the connection point between the two modules. This reduces the amount of wiring involved in the detection process. Furthermore, the simple structure and small footprint of the two modules allow for increased density of pressure-sensitive units in electronic devices, improving the accuracy of touch operation recognition.

[0139] from Figure 2 As can be seen, the control unit can detect the output voltage of the M-row N-column pressure sensing unit through M traces (one), N traces (three), and one trace (two). The pressure sensing circuit involves M+N+1 traces, which is simple to implement due to the small number of traces.

[0140] The above Figures 2 to 4 In the illustrated embodiment, the pressure-sensitive unit includes a pressure-sensitive module and a voltage divider module. In some embodiments, the pressure-sensitive unit may include a pressure-sensitive module but not a voltage divider module.

[0141] For example, Figure 5 This is a schematic diagram of a pressure-sensitive circuit provided in an embodiment of this application. Figure 5 As shown, the pressure-sensitive circuit includes: a pressure-sensitive unit 501, a control unit 502, M first-line traces 503, N second-line traces 504, and N voltage divider modules 505. The M first-line traces 503 correspond one-to-one with the M rows of pressure-sensitive units 501. The N second-line traces 504 correspond one-to-one with the N columns of pressure-sensitive units 501. The N voltage divider modules 505 correspond one-to-one with the N columns of pressure-sensitive units 501.

[0142] like Figure 5 As shown, each pressure-sensitive unit 501 includes a first end 3a and a second end 3b. The first ends 3a of any row of pressure-sensitive units 501 are connected together through a first trace 503, which is connected to the control unit 502. The second ends 3b of any column of pressure-sensitive units 501 are connected together through a second trace 504, which is connected to the control unit 502.

[0143] N voltage divider modules 505 are connected one-to-one with the second terminals of N columns of pressure sensing units 501 via wiring 504. The voltage divider modules 505 are used to divide the voltage with the selected pressure sensing unit 501, enabling the pressure sensing unit 501 to output different voltages under different pressures. Furthermore, the voltage divider modules 505 can also reduce the risk of damage to the pressure sensing unit 501 due to excessive current caused by its low resistance.

[0144] Line 1 503 and line 2 504 are used to form a loop with each pressure-sensitive unit in the selected row; line 2 504 is also used to transmit the output voltage of each pressure-sensitive unit 501 in the selected row, so that the control unit 502 can detect the output voltage of the pressure-sensitive unit 501 in that row.

[0145] In this embodiment, the resistance of the pressure-sensitive unit 501 changes with the pressure applied to the pressure-sensitive unit 501. For example, the resistance of the pressure-sensitive unit 501 may increase as the pressure applied to the pressure-sensitive unit 501 increases; the resistance of the pressure-sensitive unit 501 may decrease as the pressure applied to the pressure-sensitive unit 501 increases, and no specific limitation is made here.

[0146] In this embodiment, the pressure-sensitive unit 501 includes a pressure-sensitive module. The pressure-sensitive module includes at least one piezoresistive resistor. The resistance value of the piezoresistive resistor changes with the applied pressure.

[0147] Based on the above embodiments, the pressure-sensitive unit 501 further includes a support layer. The support layer is used to provide space for the pressure-sensitive module to deform.

[0148] In this embodiment, the support layer can be composed of materials such as sponge or foam; alternatively, the support layer can be empty, leaving space for the pressure-sensitive module to suspend. This allows the pressure-sensitive unit to have a certain deformation capacity, enabling it to deform with pressure changes and thus alter its resistance. For example, as... Figure 6 As shown, the pressure-sensitive unit includes a pressure-sensitive module and a support layer. If the pressure-sensitive unit is attached to the display screen, the pressure-sensitive module is located between the display screen and the support layer.

[0149] Figure 5 In the circuit shown, the control unit 502 is used to select pressure sensing units 501 by row and obtain the output voltage of each pressure sensing unit 501 in the selected row.

[0150] In this embodiment, the control unit 502 can select a row of pressure-sensitive units 501 sequentially, or it can randomly select a row of pressure-sensitive units 501. The specific selection method is described above. Figure 2 The corresponding explanations are provided in the original text and will not be repeated here.

[0151] like Figure 5 As shown, the control unit 502 can control whether the pressure sensing unit 501 is selected by controlling the voltage of the wiring 503.

[0152] For specific control methods, please refer to the above. Figure 2 The relevant explanations are provided in the text, and no restrictions are imposed here.

[0153] like Figure 5 As shown, the control unit 502 may include: M switches 521 and N analog-to-digital converters (ADCs) 522. The M switches 521 correspond one-to-one with the M traces 503, and the N ADCs 522 correspond one-to-one with the N traces 504.

[0154] Each switch 521 includes: one output terminal and two input terminals. See also... Figure 5 The output terminal 4a of switch 521 is connected to trace 503. The input terminal 4b of switch 521 is used to input the first voltage VRH; the input terminal 4c of switch 521 is used to input the second voltage VRL. The first voltage and the second voltage are different. For example, the first voltage is a high level and the second voltage is a low level. This application embodiment does not limit the specific values ​​of the first voltage and the second voltage.

[0155] See Figure 5 One end of any voltage divider module 505 is connected to the second end 3b of the pressure sensing unit 501, and the other end of any voltage divider module 505 is connected to the first voltage or the second voltage.

[0156] ADC 522 is used to detect the output voltage of pressure sensing unit 501. ADC 723 can detect the voltage at one end of voltage divider module 505.

[0157] Figure 5 In the circuit shown, the control unit 502 can control the voltage of the wiring 503 corresponding to each row of pressure-sensitive units 501 by controlling the M switches 521, thereby controlling whether each pressure-sensitive unit 501 is selected or not.

[0158] Specifically, taking the selection of the first row of pressure-sensitive units 501 as an example, the control unit 502 can control the connection of the output terminal 4a and the input terminal 4b in the switch 521 corresponding to the first row of pressure-sensitive units. The control unit 502 can also control the connection of the output terminal 4a and the input terminal 4c in the switch 521 corresponding to the second to Mth rows of pressure-sensitive units. In this way, the first row of pressure-sensitive units 501 can be selected, and the output voltage of the first row and first column of pressure-sensitive units 501 can be obtained.

[0159] It is understandable that the above Figure 5 In the illustrated embodiment, the selection of the pressure-sensitive unit is achieved through M switches 521. The M switches 521 can also be replaced by one or more switches. For example, taking a single switch as an example, this switch may include M output terminals and 2 input terminals. The M output terminals are connected one-to-one with M traces 503, and the two input terminals are used to connect to a first voltage and a second voltage, respectively. Alternatively, the M switches 521 can be understood as one structure of a switch module, which can also be replaced by other structures, such as one or more switches. No specific limitations are made here.

[0160] The above Figure 5 In the illustrated embodiment, the output voltage of the pressure sensing unit 501 is detected using an ADC 522. The ADC 522 can also be replaced with any voltage detection structure. For example, a voltmeter can be used to detect the output voltage of the pressure sensing unit 501; the output voltage of the pressure sensing unit 501 can be detected against a preset value by controlling the conduction of a switching transistor. Alternatively, it can be understood that N ADCs 522 constitute one structure for the detection module, and the detection module can be replaced with other structures, such as N voltmeters. No specific limitations are imposed here.

[0161] Figure 5 In the circuit shown, the pressure-sensitive unit, including the pressure-sensitive module, occupies a small area, which can increase the distribution density of pressure-sensitive units in electronic devices and improve the accuracy of touch operation recognition. Furthermore, each row of pressure-sensitive units shares a single voltage divider module, further reducing the area occupied by the pressure-sensitive circuit.

[0162] The pressure sensitivity of the pressure sensor is determined by monitoring the voltage at the connection point between the pressure sensor and the voltage divider module. Each row of pressure sensors detects one position, resulting in simple wiring. Figure 5 As can be seen, the control unit can detect the output voltage of the M-row N-column pressure sensing unit through M traces and N traces. The pressure sensing circuit involves M+N traces, which is simple to implement due to the small number of traces.

[0163] In the above embodiments, the control unit selects pressure-sensitive units by row to obtain the output voltage of each pressure-sensitive unit in the selected row. The control unit can also select pressure-sensitive units by column to obtain the output voltage of each pressure-sensitive unit in the selected column. This pressure-sensitive circuit is similar to the one described above. Figures 2 to 5 The pressure-sensitive circuits shown have similar structures and implementation principles, so they will not be described in detail here.

[0164] Based on the above embodiments, the control unit may further include: a power supply, a digital control module, etc. The power supply is used to provide the operating voltage for the readout chip. The digital control module is used to control whether the control unit operates and to control the output voltage of the ADC readout pressure sensing unit.

[0165] The above Figures 2 to 6 The illustrated embodiment obtains the output voltage of each pressure-sensitive unit in the selected row by selecting the pressure-sensitive unit; the following is in conjunction with... Figures 7 to 9 The pressure sensing circuit that obtains the output voltage of each pressure sensing unit in the selected row by selecting each pressure sensing unit is explained.

[0166] For example, Figure 7 This is a schematic diagram of a pressure-sensitive circuit provided in an embodiment of this application. Figure 7 As shown, the pressure-sensitive circuit includes: a pressure-sensitive unit 701, a control unit 702, M first-line traces 703, N second-line traces 704, and a voltage divider module 705. The M first-line traces 703 correspond one-to-one with the M rows of pressure-sensitive units 701. The N second-line traces 704 correspond one-to-one with the N columns of pressure-sensitive units 701.

[0167] like Figure 7 As shown, each pressure-sensitive unit 701 includes a first terminal 6a and a second terminal 6b. The first terminals 6a of any row of pressure-sensitive units 701 are connected together via a first trace 703, which is connected to the control unit 702. The second terminals 6b of any column of pressure-sensitive units 701 are connected together via a second trace 704, which is connected to the control unit 702.

[0168] The voltage divider module 705 is connected to the control unit 702. The voltage divider module 705 is used to divide the voltage with the selected pressure sensing unit 701, enabling the pressure sensing unit 701 to output different voltages under different pressures. Furthermore, the voltage divider module 705 can reduce the risk of damage to the pressure sensing unit 701 due to excessive current caused by its low resistance. The voltage divider module 705 can be located within the control unit 702 or can operate independently of it. No specific limitations are imposed here.

[0169] Line 1 703 and line 2 704 are used to form a loop with each pressure-sensitive unit in the selected row; line 2 704 is also used to transmit the output voltage of each pressure-sensitive unit 701 in the selected row, so that the control unit 702 can detect the output voltage of the pressure-sensitive unit 701 in that row.

[0170] In this embodiment, the resistance of the pressure-sensitive unit 701 changes with the pressure applied to the pressure-sensitive unit 701. For example, the resistance of the pressure-sensitive unit 701 may increase as the pressure applied to the pressure-sensitive unit 701 increases; the resistance of the pressure-sensitive unit 701 may decrease as the pressure applied to the pressure-sensitive unit 701 increases, and no specific limitation is made here.

[0171] In this embodiment, the pressure-sensitive unit 701 includes a pressure-sensitive module. The pressure-sensitive module includes at least one piezoresistive resistor. The resistance of the piezoresistive resistor changes with the applied pressure. The pressure-sensitive unit 701 may also include a support layer, which provides space for the deformation of the pressure-sensitive module. The support layer can be described in the corresponding description above, and will not be repeated here.

[0172] Figure 7 In the circuit shown, the control unit 702 is used to select pressure sensing units 701 one by one and obtain the output voltage of the selected pressure sensing unit 701.

[0173] In this embodiment, the control unit 702 can select the pressure-sensitive units 701 one by one in order, or it can select the pressure-sensitive units 701 randomly. This embodiment does not impose a specific limitation on the selection order of the control unit 702 for the pressure-sensitive units 701.

[0174] For example, the control unit 702 can first select the pressure-sensitive units in the first row one by one according to the row arrangement order, and obtain the output voltage of each pressure-sensitive unit 701 in the first row. After obtaining the output voltage of each pressure-sensitive unit 701 in the first row, the control unit 702 selects the pressure-sensitive units in each row one by one according to the row arrangement order to obtain the output voltage of the corresponding pressure-sensitive unit 701, until the output voltage of the pressure-sensitive unit 701 in the last row and last column is obtained.

[0175] For example, the control unit 702 can first select the pressure-sensitive units in the first column one by one according to the column arrangement order, and obtain the output voltage of each pressure-sensitive unit 701 in the first column. After obtaining the output voltage of each pressure-sensitive unit 701 in the first column, the control unit 702 selects the pressure-sensitive units in each column one by one according to the column arrangement order, and obtains the output voltage of each pressure-sensitive unit 701, until the output voltage of the pressure-sensitive units 701 in the last column and last row is obtained.

[0176] like Figure 7 As shown, the control unit 702 can control whether the pressure sensing unit 701 is selected by controlling the voltage of trace 1 703 and trace 2 704.

[0177] When the voltage of trace 1 703 is high and the voltage of trace 2 704 is low, the pressure sensing unit corresponding to the low-level trace 2 704 in the row of pressure sensing units 701 corresponding to trace 1 703 is selected; when the voltage of trace 1 703 is low and the voltage of trace 2 704 is high, the pressure sensing unit corresponding to the low-level trace 2 704 in the row of pressure sensing units 701 corresponding to trace 1 703 is selected.

[0178] When the voltages of trace 1 (703) and trace 2 (704) are both low, the pressure sensing unit in the row of pressure sensing units 701 corresponding to trace 1 (703) that corresponds to the low-level trace 2 (704) is not selected. When the voltages of trace 1 (703) and trace 2 (704) are both high, the pressure sensing unit in the row of pressure sensing units 701 corresponding to trace 1 (703) that corresponds to the high-level trace 2 (704) is not selected.

[0179] like Figure 7 As shown, the control unit 702 may include: M switches 721, N switches 722, and an analog-to-digital converter (ADC) 723. The M switches 721 correspond one-to-one with the M traces 703, and the N switches 722 correspond one-to-one with the N traces 704.

[0180] Each switch 721 includes: one output terminal and two input terminals. See also... Figure 7 The output terminal 7a of switch 721 is connected to trace 703. The input terminal 7b of switch 721 is used to input the first voltage VRH; the input terminal 7c of switch 721 is used to input the second voltage VRL. The first voltage and the second voltage are different. For example, the first voltage is a high level and the second voltage is a low level. This application embodiment does not limit the specific values ​​of the first voltage and the second voltage.

[0181] Each of the two switches 722 includes: one output terminal and two input terminals. One input terminal of the two switches 722 is used to connect to a voltage divider module, and the other input terminal is used to connect to a first voltage or a second voltage.

[0182] In some embodiments, one input terminal of switch 722 is used to connect to voltage divider module 705, and the other input terminal is used to connect to a first voltage.

[0183] See Figure 7 The output terminal 8a of switch 2 722 is connected to the trace 2 704. The input terminal 8b of switch 2 722 is used to input the first voltage VRH. The input terminal 8c of switch 2 722 is used to connect to one end of the voltage divider module 705, and the other end of the voltage divider module 705 is grounded.

[0184] The ADC 723 is used to detect the output voltage of the pressure sensing unit 701. The ADC 723 can also detect the voltage at one end of the voltage divider module 705.

[0185] Figure 7 In the circuit shown, the control unit 702 can control the voltage of the trace 703 corresponding to each row of pressure-sensitive units 701 by controlling the M switches 721, and control the voltage of the trace 704 corresponding to each column of pressure-sensitive units 701 by controlling the N switches 722, thereby controlling whether each pressure-sensitive unit 701 is selected or not.

[0186] Specifically, taking the selection of the first row and first column pressure-sensitive unit 701 as an example, the control unit 702 can control the connection of the output terminal 7a and the input terminal 7b in the switch 721 corresponding to the first row pressure-sensitive unit; the control unit 702 can control the connection of the output terminal 8a and the input terminal 8c in the switch 722 corresponding to the first column pressure-sensitive unit.

[0187] The control unit 702 can control the connection of the output terminal 7a and the input terminal 7c in the switch 721 corresponding to the pressure sensing units in rows 2 to M; the control unit 702 can control the connection of the output terminal 8a and the input terminal 8b in the switch 722 corresponding to the pressure sensing units in columns 2 to N.

[0188] In this way, the pressure-sensitive unit 701 in the first row and first column can be selected, and the output voltage of the pressure-sensitive unit 701 in the first row and first column can be obtained.

[0189] In other embodiments, one input terminal of switch 722 is used to connect to voltage divider module 705, and the other input terminal is used to connect to a second voltage.

[0190] See Figure 8The output terminal 8a of switch 722 is connected to trace 704, and the input terminal 8b of switch 722 is connected to one end of voltage divider module 705. The other end of voltage divider module 705 receives the first voltage VRH. The input terminal 8c of switch 722 is used to input the second voltage VRL.

[0191] The ADC 723 is used to detect the output voltage of the pressure sensing unit 701. The ADC 723 can also detect the voltage at one end of the voltage divider module 705.

[0192] Specifically, taking the selection of the first row and first column pressure-sensitive unit 701 as an example, the control unit 702 can control the connection of the output terminal 7a and the input terminal 7c in the switch 721 corresponding to the first row pressure-sensitive unit; the control unit 702 can control the connection of the output terminal 8a and the input terminal 8b in the switch 722 corresponding to the first column pressure-sensitive unit.

[0193] The control unit 702 can control the connection of the output terminal 7a and the input terminal 7b in the switch 721 corresponding to the pressure sensing units in rows 2 to M; the control unit 702 can control the connection of the output terminal 8a and the input terminal 8c in the switch 722 corresponding to the pressure sensing units in columns 2 to N.

[0194] This allows selection of the first row and first column pressure-sensitive unit 701, and the acquisition of its output voltage. Furthermore, the unselected pressure-sensitive units remain at a low level, enabling reset and calibration of their output voltages. This reduces crosstalk at the voltage detection points of the pressure-sensitive units, improving anti-interference capabilities.

[0195] It is understandable that the above Figure 7 and Figure 8 In the illustrated embodiment, the selection of the pressure-sensitive unit is achieved through M switches and N switches. The M switches and N switches can also be replaced with one or more switches. For example, taking a single switch as an example, this switch can include M+N output terminals and 4 input terminals. The M output terminals are connected one-to-one with M traces 703, the N output terminals are connected one-to-one with N traces 704, and the 4 input terminals are used to connect to a first voltage, a second voltage, and a third voltage. Alternatively, the M switches 721 and N switches 722 can be understood as a structure of a switch module, which can also be replaced with other structures, such as one or more switches. No specific limitations are made here.

[0196] The above Figure 7 and Figure 8In the illustrated embodiment, the output voltage of the pressure sensing unit 701 is detected using an ADC. The ADC can also be replaced with any voltage detection structure. For example, the output voltage of the pressure sensing unit 701 can be detected using a voltmeter; the output voltage of the pressure sensing unit 701 can be detected against a preset value by controlling the conduction of a switching transistor. Alternatively, the ADC 723 can be understood as one structure of the detection module, and the detection module can be replaced with other structures, such as a voltmeter. No specific limitations are made here.

[0197] The above embodiment uses one ADC as an example, but each column of pressure-sensitive units can also correspond to one ADC and one voltage divider module. No specific limitation is made here.

[0198] The above Figure 7 and Figure 8 In the pressure-sensitive circuit shown, the pressure-sensitive unit, including the pressure-sensitive module, occupies a small area, which can increase the distribution density of pressure-sensitive units in electronic devices and improve the accuracy of touch operation recognition. Furthermore, the M rows and N columns of pressure-sensitive units can share a single voltage divider module, further reducing the area occupied by the pressure-sensitive circuit.

[0199] The pressure sensitivity of the pressure sensor is determined by monitoring the voltage at the connection point between the pressure sensor and the voltage divider module. Each row of pressure sensors detects one position, resulting in simple wiring. Figure 7 or Figure 8 As can be seen, the control unit can detect the output voltage of the M-row N-column pressure sensing unit through M traces and N traces. The pressure sensing circuit involves M+N traces, which is simple to implement due to the small number of traces.

[0200] Based on the above embodiments, the control unit may further include: a power supply, a digital control module, etc. The power supply is used to provide the operating voltage for the read chip. The digital control module is used to control whether the control unit 702 operates and to control the output voltage of the ADC read pressure sensing unit.

[0201] Figures 5 to 8 In the circuit shown, the control unit can select pressure-sensitive units one by one through a matrix controller. Specifically, the matrix controller can control the switching connection of M switches and N switches.

[0202] For example, Figure 9 This is a schematic diagram of a control unit provided in an embodiment of this application. Figure 9 As shown, the control unit includes: a matrix controller 901, a digital control module 902, a sample-and-hold module 903, an ADC 904, M switches 905 (only one is shown in the figure), and N switches 906 (only one is shown in the figure).

[0203] The matrix controller 901 is used to control the switching connection of M switches 905 and N switches 906 to achieve the selection of pressure-sensitive units one by one.

[0204] For example, the matrix controller 901 can generate row selection signals to control the switching connection of M switches 905, and generate column selection signals to control the switching connection of N switches 906.

[0205] The digital control module 902 is used to control whether the matrix controller 901 works and to control the ADC 904 to read voltage signals.

[0206] The sample-and-hold module 903 is used to stabilize the output voltage of the selected pressure-sensitive unit.

[0207] The ADC 904 is used to acquire the output voltage of the selected pressure-sensitive unit.

[0208] In this way, the control unit can select each of the pressure-sensitive units mentioned above.

[0209] The above Figures 2 to 9 In the pressure-sensitive circuit shown, the control unit can detect the output voltage of the M rows and N columns of pressure-sensitive units. The control unit can then recognize touch operations based on the output voltage of these units. The control unit can also transmit the output voltage of the M rows and N columns of pressure-sensitive units to the processor in any format, such as a table or list. The processor then recognizes touch operations based on the transmitted output voltage of the M rows and N columns of pressure-sensitive units.

[0210] For example, Table 1 is a voltage reading table provided in an embodiment of this application. The voltage reading table shown in Table 1 consists of M rows and N columns of cells. Each of the M rows and N columns of cells corresponds one-to-one with an M rows and N columns of pressure sensing units.

[0211] Table 1 Voltage Reading Table

[0212] (1，1)2V (1，2)2V ...... (1, N-1)2V (1, N)2V (2，1)2V (2，2)1.8V …… (2, N-1)2V (2,N)2V (3，1)2V (3，2)1.2V …… (3, N-1)2V (3,N)2V …… …… …… …… …… (M-1,1)2V (M-1,2)2V …… (M-1, N-1)2V (M-1,N)2V (M, 1)2V (M, 2)2V …… (M, N-1)2V (M, N)2V

[0213] As can be seen from Table 1, most cells in Table 1 correspond to a voltage of 2V, the cell in the second row and second column corresponds to a voltage of 1.8V, and the cell in the third row and second column corresponds to a voltage of 1.2V.

[0214] Taking the identification of touch operation through the difference in output voltage between M rows and N columns of pressure-sensitive units as an example, the voltage corresponding to the cell in the second row and second column is different from that in the cell in the third row and second column. This means that both the pressure-sensitive unit in the second row and second column and the pressure-sensitive unit in the third row and third column are under pressure. By comparing the voltage values, it can be seen that the pressure-sensitive unit in the third row and third column is under greater pressure, and the touch operation position is closer to the position corresponding to the pressure-sensitive unit in the third row and third column.

[0215] Taking the comparison of the output voltage of the M rows and N columns of pressure-sensitive units with a preset value of 2V as an example, the voltage corresponding to the cell in the second row and second column differs from the preset value, as do the voltage corresponding to the cell in the third row and second column. This means that the pressure-sensitive units in the second row and second column, and the third row and third column, are both under pressure. Compared to the voltage corresponding to the cell in the second row and second column, the difference between the voltage in the third row and third column and the preset value is greater. Therefore, the location of the touch operation is closer to the location corresponding to the pressure-sensitive unit in the third row and third column.

[0216] It is understandable that electronic devices can achieve this through the above. Figures 2 to 9 The pressure-sensitive circuit shown enables the recognition of force at a single or multiple locations, thereby enabling the recognition of single-point or multi-point touch positions and the recognition of touch operations such as clicking and swiping.

[0217] It is understandable that the above Figures 2 to 8 In the illustrated embodiment, the M rows and N columns of pressure-sensitive units can be integrated onto a flexible printed circuit board (FPC), which can be attached to one side of the display screen. The control unit in the above embodiment can be integrated into a chip. This chip may include a power supply, a digital control module, etc. The power supply provides the operating voltage for the readout chip. The digital control module controls whether the chip operates and controls the output voltage of the ADC readout pressure-sensitive units.

[0218] The voltage divider module can be located on the FPC, in the control unit, or independently of both the FPC and the control unit. No specific limitations are made here.

[0219] In the above embodiments, the M rows and N columns of pressure-sensitive units can also be integrated on the driving panel of the display screen. The driving panel is used to drive the pixels in the display screen to light up. For example, the M rows and N columns of pressure-sensitive units are integrated on a thin film transistor (TFT) driving panel. No specific limitation is made here.

[0220] For example, Figure 10 A schematic diagram of the structure of an electronic device provided for the implementation of this application. For example... Figure 10As shown, the electronic device includes: a pressure-sensitive unit 1001 and a control unit 1002. The resistance of the pressure-sensitive unit changes with the pressure applied to it. In one possible implementation, each pressure-sensitive unit 1001 includes a first terminal and a second terminal; the first terminals of any row of pressure-sensitive units 1001 are connected in common, and the second terminals of any row of pressure-sensitive units 1001 are also connected in common. The control unit 1002 is used to select pressure-sensitive units 1001 by row and obtain the output voltage of each pressure-sensitive unit 1001 in the selected row. The output voltage of the pressure-sensitive unit 1001 changes with the pressure applied to it.

[0221] In this embodiment of the application, the pressure-sensitive unit 1001 can correspond to the pressure-sensitive unit 201 mentioned above, and the control unit 1002 can correspond to the control unit 202.

[0222] This design incorporates multiple rows and columns of pressure-sensitive units. By detecting the output voltage of each unit and analyzing the output voltages of all units, the pressure-sensitive unit receiving pressure is identified. Touch operation recognition is then achieved based on the corresponding position of the pressure-sensitive unit. Furthermore, the first terminals of each row of pressure-sensitive units 1001 are connected together, allowing them to share the same trace. Similarly, the second terminals of each row of pressure-sensitive units 1001 are also connected together, reducing the number of traces in the pressure-sensitive circuit and simplifying the wiring layout.

[0223] In one possible implementation, any pressure-sensitive unit includes: a first pressure-sensitive module and a first voltage divider module; a first terminal of the first pressure-sensitive module is the first terminal of the pressure-sensitive unit, and a second terminal of the first pressure-sensitive module is connected to the first terminal of the first voltage divider module, the second terminal of the first voltage divider module being the second terminal of the pressure-sensitive unit; the resistance of the first pressure-sensitive module changes with the applied pressure; the first voltage divider module and the first pressure-sensitive module are used to divide the voltage across the pressure-sensitive unit, so that the output voltage of the pressure-sensitive unit changes with the applied pressure.

[0224] The first pressure-sensitive module can correspond to the pressure-sensitive module of the pressure-sensitive unit 201 mentioned above; the first voltage divider module can correspond to the voltage divider module of the pressure-sensitive unit 201 mentioned above.

[0225] The pressure-sensitive unit consists of two modules connected in series. Its structure is simple and it occupies a small area. This allows electronic devices to distribute more pressure-sensitive units, increasing the density of pressure-sensitive units and improving the accuracy of touch operation recognition.

[0226] In one possible implementation, the first pressure-sensitive module includes at least one piezoresistive resistor whose resistance changes with the applied pressure.

[0227] In this way, the output voltage can be changed by using a voltage transformer, which is simple in principle and easy to implement.

[0228] In one possible implementation, the resistance of the first voltage divider module changes with the applied pressure.

[0229] In this way, the first pressure divider module can also change according to pressure changes, thereby enhancing the pressure sensing unit's ability to detect pressure.

[0230] In one possible implementation, the pressure-sensitive unit further includes a support layer, which provides space for the pressure-sensitive module to deform, so that the pressure-sensitive module changes with the pressure applied to it.

[0231] In this way, the pressure-sensitive unit has a certain deformation space, which can deform with changes in pressure and thus change the resistance value.

[0232] In one possible implementation, the first pressure-sensitive module is located on one side of the support layer, and the first pressure-dividing module is located on the other side of the support layer.

[0233] In this way, the pressure-sensitive unit occupies a smaller projected area when stacked, and more pressure-sensitive units can be arranged within the same projected area, which improves the accuracy of the pressure-sensitive circuit in confirming the position of the touch operation and enhances the sensing effect of the pressure-sensitive circuit.

[0234] Furthermore, if the first pressure-sensitive module can change with the pressure it receives, the stacked distribution can further increase the pressure-sensitive unit's sensitivity to pressure, improve the sensitivity to touch operations, and enhance the sensing effect of the pressure-sensitive circuit.

[0235] In one possible implementation, the first pressure-sensitive module and the first pressure-dividing module are located on the same side of the support layer.

[0236] In this way, the planar distribution of the pressure-sensitive module and the voltage divider module can reduce the thickness of the pressure-sensitive unit, which is beneficial for the thinning and lightening of electronic devices. In addition, if the resistance of the first voltage divider module can change with the applied pressure, the pressure-sensing area of ​​the pressure-sensitive unit can be increased, improving the accuracy of the pressure-sensitive circuit in confirming the touch operation position and enhancing the sensing effect of the pressure-sensitive circuit.

[0237] In one possible implementation, the control unit includes: a first switch module and a first detection module; the first detection module is used to detect the output voltage of each pressure-sensitive unit in the selected row; the first switch module includes M first output terminals, a first input terminal, and a second input terminal, the M first output terminals are connected one-to-one with the first terminals of the M rows of pressure-sensitive units, the first input terminals are used to connect to a first voltage, and the second input terminals are used to connect to a second voltage, the first voltage and the second voltage being different; when the second terminal of the first voltage divider module is connected to the first voltage, the first switch module is used to control the M first output terminals to connect to the second input terminal in turn to achieve row-by-row selection of pressure-sensitive units; or, when the second terminal of the first voltage divider module is connected to the second voltage, the first switch module is used to control the M first output terminals to connect to the first input terminal in turn to achieve row-by-row selection of pressure-sensitive units.

[0238] The first switch module can correspond to the switch module composed of switch 221 mentioned above. The M first output terminals can correspond to the output terminals 2a of the M switches 221. The first input terminal can correspond to the input terminal 2b of switch 221. The second input terminal can correspond to the input terminal 2c of switch 221.

[0239] The first switch module can also be replaced with other structures, as detailed in the structural description of the replacement of switch 221 above, which will not be repeated here. The first detection module can correspond to the detection module composed of ADC 222 mentioned above. The first detection module can also be replaced with other structures, as detailed in the structural description of the replacement of ADC 222 above, which will not be repeated here.

[0240] In this way, the control unit selects a row of pressure-sensitive units by controlling the voltage changes at multiple first output terminals. The control method is simple and easy to implement.

[0241] In one possible implementation, the second terminals of any column of first pressure-sensitive modules are connected together; the first detection module includes: N analog-to-digital converters; the N analog-to-digital converters are connected one-to-one with the second terminals of the N columns of first pressure-sensitive modules; the N analog-to-digital converters are used to detect the output voltage of each pressure-sensitive unit in the selected row.

[0242] The analog-to-digital converter can correspond to the ADC 222 mentioned above.

[0243] In this way, each row of pressure-sensitive units shares a single analog-to-digital converter (ADC) for detection, reducing the number of ADCs required and lowering the cost and footprint of the pressure-sensitive circuit. Furthermore, the ADC's method of detecting the output voltage is simple and easy to implement. Additionally, the second terminals of the first pressure-sensitive modules in any row are shared, and the third terminals of all pressure-sensitive units in a row can share the same trace, reducing the number of traces in the pressure-sensitive circuit and simplifying the wiring layout.

[0244] In one possible implementation, the pressure-sensitive unit is located on one side of the display screen to detect pressure applied by the user on the other side. This placement of the pressure-sensitive unit at the display screen enables the recognition of touch operations on the screen.

[0245] In the second possible implementation, each pressure-sensitive unit 1001 includes a first terminal and a second terminal, the first terminals of any row of pressure-sensitive units 1001 are connected together, and the second terminals of any column of pressure-sensitive units 1001 are connected together; the control unit 1002 is used to select pressure-sensitive units 1001 by row and obtain the output voltage of each pressure-sensitive unit 1001 in the selected row, or to select pressure-sensitive units 1001 one by one and obtain the output voltage of the selected pressure-sensitive unit 1001; wherein, the output voltage of the pressure-sensitive unit 1001 changes with the pressure applied to the pressure-sensitive unit 1001.

[0246] In this embodiment, pressure-sensitive unit 1001 can correspond to pressure-sensitive unit 501 mentioned above, and control unit 1002 can correspond to control unit 502. Control unit 1002 is used to select pressure-sensitive units by row and obtain the output voltage of each pressure-sensitive unit in the selected row. The output voltage of pressure-sensitive unit 1001 changes with the pressure applied to pressure-sensitive unit 1001.

[0247] Alternatively, pressure-sensitive unit 1001 can correspond to pressure-sensitive unit 701 mentioned above, and control unit 1002 can correspond to control unit 702. Control unit 1002 is used to select pressure-sensitive units 1001 one by one and obtain the output voltage of the selected pressure-sensitive unit 1001. The output voltage of pressure-sensitive unit 1001 changes with the pressure applied to pressure-sensitive unit 1001.

[0248] This design incorporates multiple rows and columns of pressure-sensitive units. By detecting the output voltage of each unit and analyzing the output voltages of all units, the pressure-sensitive unit receiving pressure is identified. Touch operation recognition is then achieved based on the corresponding position of the pressure-sensitive unit. Furthermore, the first terminals of a row of pressure-sensitive units 1001 are connected together, allowing them to share the same trace. Similarly, the second terminals of a column of pressure-sensitive units 1001 are also connected together, reducing the number of traces in the pressure-sensitive circuit and simplifying the wiring layout.

[0249] In one possible implementation, the pressure-sensitive circuit further includes: a second voltage divider module; each pressure-sensitive unit includes: a second pressure-sensitive module; the control unit includes: a second switch module and a second detection module; the second detection module is used to detect the output voltage of the selected pressure-sensitive unit; the second switch module includes M first output terminals, N second output terminals, a first input terminal, a second input terminal, a third input terminal, and a fourth input terminal, the M first output terminals are connected one-to-one with the first terminals of the M rows of pressure-sensitive units, the N second output terminals are connected one-to-one with the second terminals of the N columns of pressure-sensitive units, the first input terminals are used to connect to a first voltage, and the second input terminals are used to connect to a second voltage; the first voltage and the second voltage are different; the second switch module is used to control the M first output terminals to connect to the first input terminals in turn, and to control the N second output terminals to connect to the third input terminal, so as to select the pressure-sensitive units one by one.

[0250] The third input terminal is connected to one end of the second voltage divider module, the other end of the second voltage divider module is connected to the first voltage, and the fourth input terminal is used to connect to the second voltage; the second switch module is used to control M first output terminals to connect to the second input terminal in turn, and N second output terminals to connect to the fourth input terminal in turn, so as to select the pressure sensing unit one by one; or, the third input terminal is used to connect to the first voltage, the fourth input terminal is connected to one end of the second voltage divider module, and the other end of the second voltage divider module is connected to the second voltage; the second switch module is used to control M first output terminals to connect to the first input terminal in turn, and N second output terminals to connect to the third input terminal in turn, so as to select the pressure sensing unit one by one.

[0251] The second switch module can correspond to the switch module composed of switch one 721 and switch two 722 mentioned above. The M first output terminals can correspond to the M output terminals 7a of switch one 721, the first input terminal can correspond to the input terminal 7b of switch one 721, and the second input terminal can correspond to the input terminal 7c of switch one 721. The N second output terminals can correspond to the N output terminals 8a of switch two 722, the third input terminal can correspond to the input terminal 8b of switch two 722, and the fourth input terminal can correspond to the input terminal 8c of switch two 722. See the above for details. Figure 7 and Figure 8 .

[0252] The second switch module can also be replaced with other structures, as detailed in the description of the replaceable structures of switch 721 and switch 722 above, which will not be repeated here. The second detection module can correspond to the detection module composed of ADC 723 above. The second detection module can also be replaced with other structures, as detailed in the description of the replacement structures of ADC 723 above, which will not be repeated here.

[0253] By having multiple pressure-sensitive units share a voltage divider module, the number of voltage divider modules in the pressure-sensitive circuit can be reduced, thus lowering the cost and footprint of the pressure-sensitive circuit. This allows for the distribution of more pressure-sensitive units in the electronic device, increasing the density of pressure-sensitive units and improving the accuracy of touch operation recognition.

[0254] In one possible implementation, the second pressure-sensitive module includes at least one piezoresistive resistor whose resistance changes with the applied pressure.

[0255] The second pressure-sensitive module can correspond to the pressure-sensitive module in the pressure-sensitive unit 701 mentioned above.

[0256] In this way, the output voltage can be changed by using a voltage transformer, which is simple in principle and easy to implement.

[0257] In one possible implementation, the second switch module includes: M first switches and N second switches; each first switch includes: one output terminal and two input terminals; the output terminals of the M first switches are connected one-to-one with the first terminals of the M rows of pressure-sensitive units; one input terminal of the M first switches is connected to a first voltage, and the other input terminal of the M first switches is connected to a second voltage; each second switch includes: one output terminal and two input terminals; the output terminals of the N second switches are connected one-to-one with the second terminals of the N columns of pressure-sensitive units; one input terminal of the N second switches is connected to the first voltage, and the other input terminal of the N second switches is connected to one end of the second voltage divider module, and the other end of the second voltage divider module is connected to the second voltage; or, one input terminal of the N second switches is connected to the second voltage, and the other input terminal of the N second switches is connected to one end of the second voltage divider module, and the other end of the second voltage divider module is connected to the first voltage.

[0258] The first switch can correspond to switch 721 mentioned above, the second switch can correspond to switch 722 mentioned above, and the second voltage divider module can correspond to voltage divider module 705 mentioned above.

[0259] In this way, the control unit selects the pressure-sensitive units one by one by controlling the voltage changes of multiple first output terminals and second output terminals. The control method is simple and easy to implement.

[0260] In one possible implementation, the control unit further includes a matrix controller; the matrix controller is used to control the switching connection of M first output terminals and N second output terminals to achieve sequential selection of pressure-sensitive units.

[0261] This allows for the selection of each pressure-sensitive unit individually.

[0262] In one possible implementation, the pressure-sensitive circuit includes: a second voltage divider module; the second detection module includes: an analog-to-digital converter; the analog-to-digital converter is connected to one end of the second voltage divider module; the analog-to-digital converter is used to detect the output voltage of each pressure-sensitive unit in the selected row.

[0263] The first switch can correspond to switch 721 mentioned above, the second switch can correspond to switch 722 mentioned above, and the second voltage divider module can correspond to voltage divider module 705 mentioned above.

[0264] In this way, multiple pressure-sensing units share a single second voltage divider module, and multiple pressure-sensing units share a single analog-to-digital converter (ADC) for output voltage detection. The reduced number of voltage divider modules and ADCs in the pressure-sensing circuit results in lower cost and smaller footprint. Furthermore, the ADC's output voltage detection method is simple and easy to implement.

[0265] In one possible implementation, the pressure-sensitive circuit includes: N second voltage divider modules; the switching unit includes: N third input terminals or N fourth input terminals; one end of each of the N second voltage divider modules is connected to one of the N third input terminals, or one end of each of the N second voltage divider modules is connected to one of the N fourth input terminals; the second detection module includes: N analog-to-digital converters; the N analog-to-digital converters are connected to one of the N second voltage divider modules; the N analog-to-digital converters are used to detect the output voltage of the selected pressure-sensitive unit.

[0266] It is understandable that each third input terminal corresponds to one ADC. Alternatively, each fourth input terminal corresponds to one ADC.

[0267] In this way, each row of pressure-sensitive units shares a second voltage divider module, and each row of pressure-sensitive units shares an analog-to-digital converter (ADC) for output voltage detection. The reduced number of voltage divider modules and ADCs in the pressure-sensitive circuit results in lower cost and smaller footprint. Furthermore, the ADC's output voltage detection method is simple and easy to implement.

[0268] In one possible implementation, the pressure-sensitive circuit further includes: N third voltage divider modules; each pressure-sensitive unit includes: a third pressure-sensitive module; the first terminals of the N third voltage divider modules are connected to the second terminals of the N column pressure-sensitive units; the second terminals of the third voltage divider modules are connected to a first voltage or a second voltage; the control unit includes: a third switch module and a third detection module; the third detection module is used to obtain the output voltage of each pressure-sensitive unit in the selected row; the third switch module includes M first output terminals, a first input terminal, and a second input terminal, the M first output terminals are connected one-to-one with the first terminals of the M row pressure-sensitive units, the first input terminals are used to connect to the first voltage, and the second input terminals are used to connect to the second voltage; the first voltage and the second voltage are different.

[0269] When the first voltage is connected to the second terminal of the third voltage divider module, the third switch module is used to control the M first output terminals to connect to the second input terminal in turn, so as to realize the selection of pressure sensing units by row; or, when the second voltage is connected to the second terminal of the third voltage divider module, the third switch module is used to control the M first output terminals to connect to the first input terminal in turn, so as to realize the selection of pressure sensing units by row.

[0270] The third voltage divider module can correspond to the voltage divider module 505 mentioned above, and the third pressure sensing module can correspond to the pressure sensing module of the pressure sensing unit 505 mentioned above. The third switch module can correspond to the switch module composed of switch 521 mentioned above. The M first output terminals can correspond to the output terminals 4a of the M switches 521, the first input terminals can correspond to the input terminals 4b of switches 521, and the second input terminals can correspond to the input terminals 4c of switches 521. See the above for details. Figure 5 .

[0271] By sharing a voltage divider module among multiple pressure-sensitive units, the number of voltage divider modules in the pressure-sensitive circuit can be reduced, thereby lowering the cost and footprint of the pressure-sensitive circuit. This allows for the distribution of more pressure-sensitive units in the electronic device, increasing the density of pressure-sensitive units and improving the accuracy of touch operation recognition. Furthermore, the first terminals of a row of pressure-sensitive units 1001 are connected together, and the first terminals of a row of pressure-sensitive units 1001 can share the same trace connection; similarly, the second terminals of a column of pressure-sensitive units 1001 are also connected together, and the second terminals of a column of pressure-sensitive units 1001 can share the same trace connection, reducing the number of traces in the pressure-sensitive circuit and simplifying the wiring layout.

[0272] In one possible implementation, the third pressure-sensitive module includes at least one piezoresistive resistor whose resistance changes with the applied pressure.

[0273] In this way, the output voltage can be changed by using a voltage transformer, which is simple in principle and easy to implement.

[0274] In one possible implementation, the pressure-sensitive unit is located on one side of the display screen to detect pressure applied by the user on the other side. This placement of the pressure-sensitive unit at the display screen enables the recognition of touch operations on the screen.

[0275] Based on the above embodiments, the control unit 1002 can process the output voltage of the pressure-sensitive unit to recognize touch operations. The control unit 1002 can also transmit the output voltage of each pressure-sensitive unit to the processor 1003; the processor 1003 recognizes the touch operation based on the output voltage of the pressure-sensitive unit.

[0276] It should be noted that the module names involved in the embodiments of this application can all be defined as other names, as long as they can achieve the function of each module, and no specific restrictions are placed on the module names.

[0277] This application provides a circuit board including the pressure-sensitive unit described above. The circuit board can be an FPC or any type of circuit board, and is not specifically limited here.

[0278] The following is combined Figure 11 and Figure 12 right Figure 10 The control method of the pressure-sensitive circuit shown will be explained.

[0279] For example, Figure 11 This is a flowchart illustrating a control method provided in an embodiment of this application. Figure 11 As shown, the method includes: S1101, the control unit selects the pressure-sensitive unit by row.

[0280] For details, please refer to the above explanations; they will not be repeated here.

[0281] S1102 The control unit obtains the output voltage of each pressure-sensitive unit in the selected row and transmits the output voltage of the pressure-sensitive unit to the processor.

[0282] The control unit can transmit the output voltage of the pressure-sensitive unit to the processor in a tabular or arbitrary form. Please refer to the relevant descriptions above for details, which will not be repeated here.

[0283] S1103 The processor recognizes touch operations based on the output voltage of the pressure-sensitive unit.

[0284] In some embodiments, the processor can identify the pressure-sensitive unit by comparing its output voltage with a preset value, thereby recognizing the touch operation. For details, please refer to the above description; further elaboration is omitted here.

[0285] In other embodiments, the processor can determine whether a pressure-sensitive unit senses pressure by comparing the output voltages of multiple pressure-sensitive units, thereby recognizing touch operations. For details, please refer to the above description; further elaboration is unnecessary here.

[0286] In this way, the output voltage of each pressure-sensitive unit is detected, and the output voltage of all pressure-sensitive units is analyzed to identify the pressure-sensitive unit that is under pressure. Then, the touch operation is recognized based on the position of the pressure-sensitive unit.

[0287] In one possible implementation, the control unit selects pressure-sensitive units row by row, including: when a second voltage is connected to the second terminal of the first voltage divider module, the control unit controls M first output terminals to connect to the second input terminal in turn to achieve row-by-row selection of pressure-sensitive units; or, when a second voltage is connected to the second terminal of the first voltage divider module, the control unit controls M first output terminals to connect to the first input terminal in turn to achieve row-by-row selection of pressure-sensitive units.

[0288] The first voltage divider module and the control unit can be referred to the corresponding descriptions above, and will not be repeated here.

[0289] For example, Figure 12 This is a flowchart illustrating a control method provided in an embodiment of this application. Figure 12 As shown, the method includes:

[0290] S1201, the control unit selects the pressure-sensitive units one by one.

[0291] For details, please refer to the above explanations; they will not be repeated here.

[0292] S1202 The control unit obtains the output voltage of the selected pressure-sensitive unit and transmits the output voltage of the pressure-sensitive unit to the processor.

[0293] The control unit can transmit the output voltage of the pressure-sensitive unit to the processor in a tabular or arbitrary form. Please refer to the relevant descriptions above for details, which will not be repeated here.

[0294] S1203 The processor recognizes touch operations based on the output voltage of the pressure-sensitive unit.

[0295] For details, please refer to S1103; further details will not be provided here.

[0296] In this way, the output voltage of each pressure-sensitive unit is detected, and the output voltage of all pressure-sensitive units is analyzed to identify the pressure-sensitive unit being subjected to pressure. Then, the touch operation is recognized based on the position of the corresponding pressure-sensitive unit.

[0297] In one possible implementation, the control unit selects pressure-sensitive units one by one, including: when a first voltage is connected to the second terminal of the first voltage divider module, the control unit controls M first output terminals to connect to the second input terminal in turn, and N second output terminals to connect to the fourth input terminal in turn, so as to select pressure-sensitive units one by one; or, when a second voltage is connected to the second terminal of the first voltage divider module, the control unit controls M first output terminals to connect to the first input terminal in turn, and N second output terminals to connect to the third input terminal in turn, so as to select pressure-sensitive units one by one.

[0298] The second voltage divider module and the control unit can be referred to the corresponding descriptions above, and will not be repeated here.

[0299] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in the embodiments of this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of related data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0300] The control method of the embodiments of this application has been described above. The apparatus for executing the above method provided in the embodiments of this application is described below. Those skilled in the art will understand that the methods and apparatus can be combined with and referenced by each other, and the related apparatus provided in the embodiments of this application can execute the steps in the above method.

[0301] The control method provided in this application can be applied to electronic devices with touch functionality. Electronic devices include terminal devices; the specific device form of the terminal device can be referred to the above-described related features, and will not be repeated here.

[0302] This application provides a terminal device, which includes a processor and a memory; the memory stores computer execution instructions; the processor executes the computer execution instructions stored in the memory, causing the terminal device to perform the above-described method.

[0303] This application provides a chip. The chip includes a processor, which is used to call a computer program in memory to execute the technical solutions in the above embodiments. Its implementation principle and technical effects are similar to those in the related embodiments described above, and will not be repeated here.

[0304] This application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, it implements the methods described above. The methods described in the above embodiments can be implemented wholly or partially by software, hardware, firmware, or any combination thereof. If implemented in software, the functionality can be stored as one or more instructions or code on or transmitted over the computer-readable medium. The computer-readable medium can include computer storage media and communication media, and can also include any medium that can transfer a computer program from one place to another. The storage medium can be any target medium accessible by a computer.

[0305] In one possible implementation, a computer-readable medium may include RAM, ROM, compact disc read-only memory (CD-ROM) or other optical disc storage, disk storage or other magnetic storage devices, or any other medium targeted to carry or to store the required program code in the form of instructions or data structures, and accessible by a computer. Furthermore, any connection is appropriately referred to as a computer-readable medium. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. As used herein, disks and optical discs include optical discs, laser discs, optical discs, Digital Versatile Discs (DVDs), floppy disks, and Blu-ray discs, where disks typically reproduce data magnetically, while optical discs optically reproduce data using lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0306] This application provides a computer program product, which includes a computer program that, when run, causes a computer to perform the above-described method.

[0307] This application describes embodiments of methods, apparatus (systems), and computer program products according to embodiments of this application with reference to flowchart illustrations and / or block diagrams. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processing unit of a general-purpose computer, special-purpose computer, embedded processor, or other programmable device to produce a machine, such that the instructions, which execute via the processing unit of the computer or other programmable data processing device, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0308] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solution of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pressure-sensitive circuit, characterized in that, include: Control unit and M line N rows of pressure-sensitive units; The resistance of the pressure-sensitive unit changes with the pressure applied to it. Each pressure-sensitive unit includes a first terminal and a second terminal, the first terminals of the pressure-sensitive units in any row are connected together, and the second terminals of the pressure-sensitive units in any row are connected together; the control unit is used to select the pressure-sensitive units by row and obtain the output voltage of each pressure-sensitive unit in the selected row; The output voltage of the pressure-sensitive unit varies with the pressure applied to it. Each of the pressure-sensitive units includes a first voltage divider module; The control unit includes: a first switching module and a first detection module; the first detection module is used to detect the output voltage of each pressure-sensitive unit in the selected row; The first switch module includes M first output terminals, a first input terminal, and a second input terminal. The M first output terminals are connected one-to-one with the first terminals of the M rows of pressure-sensitive units. The first input terminal is used to connect to a first voltage, and the second input terminal is used to connect to a second voltage. The first voltage and the second voltage are different. When the first voltage is connected to the second terminal of the first voltage divider module, the first switch module is used to control the M first output terminals to be connected to the second input terminal in turn, so as to realize the row selection of the pressure sensing unit; Alternatively, when the second voltage is connected to the second terminal of the first voltage divider module, the first switch module is used to control the M first output terminals to connect to the first input terminal in turn, so as to achieve row-by-row selection of the pressure-sensitive unit.

2. The circuit according to claim 1, characterized in that, Each of the pressure-sensitive units further includes: a first pressure-sensitive module; a first end of the first pressure-sensitive module is the first end of the pressure-sensitive unit, and a second end of the first pressure-sensitive module is connected to the first end of the first voltage divider module, wherein the second end of the first voltage divider module is the second end of the pressure-sensitive unit; The resistance of the first pressure-sensitive module changes with the applied pressure; The first voltage divider module and the first pressure sensing module are used to divide the voltage across the pressure sensing unit, so that the output voltage of the pressure sensing unit changes with the pressure applied to the pressure sensing unit.

3. The circuit according to claim 2, characterized in that, The first pressure-sensitive module includes at least one pressure-transformer resistor, the resistance of which changes with the applied pressure.

4. The circuit according to claim 3, characterized in that, The resistance of the first voltage divider module changes with the applied pressure.

5. The circuit according to any one of claims 2-4, characterized in that, The pressure-sensitive unit further includes a support layer, which provides space for the pressure-sensitive module to deform, so that the pressure-sensitive module changes with the pressure it receives.

6. The circuit according to claim 5, characterized in that, The first pressure-sensitive module is located on one side of the support layer, and the first pressure-dividing module is located on the other side of the support layer; Alternatively, the first pressure-sensitive module and the first pressure-dividing module are located on the same side of the support layer.

7. The circuit according to any one of claims 2-4 and 6, characterized in that, The second terminals of any column of the first pressure-sensitive modules are connected together; The first detection module includes: N analog-to-digital converters; the N analog-to-digital converters are connected one-to-one with the second terminals of the N columns of the first pressure-sensitive modules; The N analog-to-digital converters are used to detect the output voltage of each pressure-sensitive unit in the selected row.

8. The circuit according to any one of claims 1-4 and 6, characterized in that, The pressure-sensitive unit is located on one side of the display screen to detect the pressure applied by the user on the other side of the display screen.

9. A pressure-sensitive circuit, characterized in that, include: Control unit and M line N columns of pressure-sensitive units; the resistance of each pressure-sensitive unit changes with the pressure applied to it; Each of the pressure-sensitive units includes a first end and a second end, the first ends of the pressure-sensitive units in any row are connected together, and the second ends of the pressure-sensitive units in any column are connected together; The control unit is configured to select the pressure-sensitive units row by row and obtain the output voltage of each pressure-sensitive unit in the selected row, or to select the pressure-sensitive units one by one and obtain the output voltage of the selected pressure-sensitive units; wherein the output voltage of the pressure-sensitive unit changes with the pressure applied to the pressure-sensitive unit. The pressure-sensitive circuit further includes a second voltage divider module; the control unit includes a second switch module and a second detection module; the second detection module is used to detect the output voltage of the selected pressure-sensitive unit; The second switch module includes M first output terminals, N second output terminals, a first input terminal, a second input terminal, a third input terminal, and a fourth input terminal. The M first output terminals are connected one-to-one with the first terminals of the M rows of pressure-sensitive units, and the N second output terminals are connected one-to-one with the second terminals of the N columns of pressure-sensitive units. The first input terminals are used to connect to a first voltage, and the second input terminals are used to connect to a second voltage; the first voltage and the second voltage are different. The second switch module is used to control the M first output terminals to connect to the first input terminal in turn, and to control the N second output terminals to connect to the third input terminal, so as to select the pressure-sensitive unit one by one; Wherein, the third input terminal is connected to one end of the second voltage divider module, the other end of the second voltage divider module is connected to the first voltage, and the fourth input terminal is used to connect to the second voltage; the second switch module is used to control the M first output terminals to be connected to the second input terminal in turn, and the N second output terminals to be connected to the fourth input terminal in turn, so as to select the pressure-sensitive unit one by one; or, the third input terminal is used to connect to the first voltage, the fourth input terminal is connected to one end of the second voltage divider module, and the other end of the second voltage divider module is connected to the second voltage; the second switch module is used to control the M first output terminals to be connected to the first input terminal in turn, and the N second output terminals to be connected to the third input terminal in turn, so as to select the pressure-sensitive unit one by one; Alternatively, the pressure-sensitive circuit may further include: N third voltage divider modules; the first terminals of the N third voltage divider modules are connected to the second terminals of the N columns of pressure-sensitive units; the second terminals of the third voltage divider modules are connected to a first voltage or a second voltage; The control unit includes a third switch module and a third detection module; the third detection module is used to obtain the output voltage of each pressure-sensitive unit in the selected row. The third switch module includes M first output terminals, a first input terminal, and a second input terminal. The M first output terminals are connected one-to-one with the first terminals of the M rows of pressure-sensitive units. The first input terminal is used to connect to a first voltage, and the second input terminal is used to connect to a second voltage. The first voltage and the second voltage are different. When the first voltage is connected to the second terminal of the third voltage divider module, the third switch module is used to control the M first output terminals to be connected to the second input terminal in turn, so as to realize the row selection of the pressure sensing unit; Alternatively, when the second voltage is connected to the second terminal of the third voltage divider module, the third switch module is used to control the M first output terminals to be connected to the first input terminal in turn, so as to realize the row-by-row selection of the pressure sensing unit.

10. The circuit according to claim 9, characterized in that, Each of the pressure-sensitive units includes: a second pressure-sensitive module.

11. The circuit according to claim 10, characterized in that, The second pressure-sensitive module includes at least one pressure-transformer resistor, the resistance of which changes with the applied pressure.

12. The circuit according to claim 10 or 11, characterized in that, The second switch module includes: M first switches and N second switches; Each of the first switches includes: one output terminal and two input terminals; the output terminals of the M first switches are connected one-to-one with the first terminals of the M rows of pressure-sensitive units; one input terminal of the M first switches is connected to a first voltage, and the other input terminal of the M first switches is connected to a second voltage; Each of the second switches includes: one output terminal and two input terminals; the output terminals of the N second switches are connected one-to-one with the second terminals of the N columns of pressure-sensitive units; One input terminal of the N second switches is connected to the first voltage, and the other input terminal of the N second switches is connected to one end of the second voltage divider module, and the other end of the second voltage divider module is connected to the second voltage. Alternatively, one input terminal of the N second switches is connected to the second voltage, the other input terminal of the N second switches is connected to one end of the second voltage divider module, and the other end of the second voltage divider module is connected to the first voltage.

13. The circuit according to claim 10 or 11, characterized in that, The control unit further includes: a matrix controller; The matrix controller is used to control the switching connection of the M first output terminals and the N second output terminals to select the pressure-sensitive units one by one.

14. The circuit according to claim 10 or 11, characterized in that, The pressure-sensitive circuit includes: a second voltage divider module; the second detection module includes: an analog-to-digital converter; the analog-to-digital converter is connected to one end of the second voltage divider module; the analog-to-digital converter is used to detect the output voltage of each pressure-sensitive unit in the selected row; Alternatively, the pressure-sensitive circuit includes: N second voltage divider modules, and the number of third input terminals is N or the number of fourth input terminals is N; one end of each of the N second voltage divider modules is connected to one of the N third input terminals, or one end of each of the N second voltage divider modules is connected to one of the N fourth input terminals; the second detection module includes: N analog-to-digital converters; the N analog-to-digital converters are connected to the second terminals of the N columns of second pressure-sensitive modules; the N analog-to-digital converters are used to detect the output voltage of each pressure-sensitive unit in the selected row.

15. The circuit according to claim 9, characterized in that, Each of the pressure-sensitive units includes: a third pressure-sensitive module.

16. The circuit according to claim 15, characterized in that, The third pressure-sensitive module includes at least one pressure-sensitive resistor whose resistance changes with the applied pressure.

17. The circuit according to any one of claims 9-11 and 15-16, characterized in that, The pressure-sensitive unit is located on one side of the display screen to detect the pressure applied by the user on the other side of the display screen.

18. A circuit board, characterized in that, include: The pressure-sensitive unit in the pressure-sensitive circuit according to any one of claims 1-17.

19. A chip, characterized in that, include: The control unit in the pressure-sensitive circuit according to any one of claims 1-17.

20. An electronic device, characterized in that, include: The pressure-sensitive unit in the pressure-sensitive circuit according to any one of claims 1-17, and the control unit in the pressure-sensitive circuit according to any one of claims 1-17.

21. A control method, characterized in that, The method, applied to the pressure-sensitive circuit according to any one of claims 1-8, 9, and 15-16, comprises: The control unit selects the pressure-sensitive unit by row; The control unit obtains the output voltage of each pressure-sensitive unit in the selected row and transmits the output voltage of the pressure-sensitive unit to the processor; The processor identifies touch operations based on the output voltage of the pressure-sensitive unit.

22. The method according to claim 21, characterized in that, The control unit selects pressure-sensitive units by row, including: When a second voltage is connected to the second terminal of the first voltage divider module, the control unit controls M first output terminals to connect to the second input terminal in turn, so as to select the pressure sensing unit by row; Alternatively, when a second voltage is connected to the second terminal of the first voltage divider module, the control unit controls the M first output terminals to connect to the first input terminal in turn, so as to select the pressure-sensitive unit by row.

23. A control method, characterized in that, The method, applied to the pressure-sensitive circuit according to any one of claims 9-14, comprises: The control unit selects the pressure-sensitive units one by one; The control unit obtains the output voltage of the selected pressure-sensitive unit and transmits the output voltage of the pressure-sensitive unit to the processor. The processor identifies touch operations based on the output voltage of the pressure-sensitive unit.

24. The method according to claim 23, characterized in that, The control unit selects pressure-sensitive units one by one, including: When the second voltage is connected to the second terminal of the second voltage divider module, the control unit controls M first output terminals to connect to the second input terminal in turn, and N second output terminals to connect to the fourth input terminal in turn, so as to select the pressure sensing unit one by one; Alternatively, when a second voltage is connected to the second terminal of the second voltage divider module, the control unit controls the M first output terminals to connect to the first input terminal in turn, and the N second output terminals to connect to the third input terminal in turn, so as to select the pressure sensing unit one by one.

Images