Vehicle-mounted display screen pressure sensing system and method and storage medium

Abstract

The invention provides a vehicle-mounted display screen pressure sensing system and method and a storage medium, the system comprises a screen glass cover plate, a display module and a pressure sensing diaphragm, and the pressure sensing diaphragm is placed between the screen glass cover plate and the display module; the pressure sensing diaphragm comprises a Wheatstone resistor matrix composed of N Wheatstone bridges, wherein N is a natural number greater than or equal to 1; a processor and a discrete device or an integrated circuit are further arranged below the display module; the pressure sensing diaphragm transmits pressure monitoring information and temperature compensation detection information to the discrete device or the integrated circuit; the discrete device or the integrated circuit transmits pressure monitoring information and temperature compensation detection information to the processor. According to the scheme provided by the invention, the precision of vehicle-mounted pressure sensing detection can be improved, and full-screen pressure sensing can be realized.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle display screens, and in particular to a vehicle-mounted display screen pressure sensing system, method and storage medium. Background Art

[0002] In the current in-vehicle pressure sensing technology, whether it is a resistor, capacitor or inductor sensing principle, usually a single or multiple pressure sensors are used, and these sensors are generally arranged under the display module. In order to avoid interfering with the screen display effect, the sensor is generally placed at the edge of the screen, so black edges will appear around the screen. This black edge phenomenon affects the visual effect and has a negative impact on the user experience.

[0003] In addition, due to the layout of the sensors, the sensing capability in the middle area of ​​the screen is usually weaker, which results in uneven pressure detection of the entire display module. In particular, pressure changes in the center area of ​​the screen are difficult to accurately monitor.

[0004] In order to solve this problem, the existing technology often increases the number of sensors to cover the entire area of ​​the display module. However, this not only increases the complexity of the design, but also may affect the stability of the overall structure. At the same time, each sensor requires an independent connector and cable, which increases the complexity and cost of the system.

[0005] As the number of sensors increases, the product development process becomes more complicated, involving multiple links such as sensor selection, layout, signal processing, system testing, etc., all of which require high-level engineering technology and strict production management. Summary of the invention

[0006] To solve the above technical problems, the present application provides a vehicle-mounted display screen pressure sensing system, method and storage medium. Through a Wheatstone resistor matrix composed of multiple Wheatstone bridges, the force condition of the screen can be evenly sensed and the problem of black edges of the screen can be avoided.

[0007] In a first aspect, the present application provides a vehicle-mounted display screen pressure sensing system, comprising a screen glass cover, a display module and a pressure sensing diaphragm, wherein the pressure sensing diaphragm is placed between the screen glass cover and the display module.

[0008] in,

[0009] The pressure sensing diaphragm includes: a Wheatstone resistor matrix composed of N Wheatstone bridges, where N is a natural number greater than or equal to 1.

[0010] The display module also includes: a processor and discrete devices or integrated circuits below.

[0011] The pressure sensing diaphragm transmits pressure monitoring information and temperature compensation detection information to the discrete device or integrated circuit.

[0012] The discrete device or integrated circuit transmits pressure monitoring information and temperature compensation detection information to the processor.

[0013] The solution provided in this application places the pressure-sensing diaphragm between the screen glass cover and the display module, which can effectively cover the entire screen area. This layout enables the pressure-sensing diaphragm to sense pressure on the contact surface and transmit the pressure detection information to the display module. In order to ensure the accuracy and comprehensiveness of the sensing, the pressure-sensing diaphragm needs to have high sensitivity and uniform pressure response capabilities, and it needs to be well connected with the signal processing PCBA to achieve accurate transmission and processing of data. Using the solution proposed in this application can reduce the black edge problem and improve the pressure sensing effect of the entire display area.

[0014] The pressure sensing diaphragm is equipped with a Wheatstone resistor matrix composed of N Wheatstone bridges. The Wheatstone bridge is used to improve the detection accuracy and sensitivity, and to combine the matrix and algorithm to determine the specific position of the pressure sensing.

[0015] Furthermore, the pressure sensing diaphragm is connected to the display module via a connector.

[0016] The connector includes: an FPC and an FPC connector.

[0017] Furthermore, the input end of the FPC is connected to the pressure sensing diaphragm, and the output end of the FPC is connected to the input end of the FPC connector.

[0018] The output end of the FPC connector is connected to the discrete device or the integrated circuit input end.

[0019] The discrete device or integrated circuit output terminal is connected to the processor input terminal.

[0020] The solution proposed in this application uses FPC and FPC connector to connect the pressure sensing diaphragm and the display module; FPC can be bent and folded in multiple directions, making it suitable for application environments with limited space or irregular shapes, and the thickness of FPC is relatively thin, which is very suitable for lightweight and miniaturized design; due to the flexible characteristics of FPC, it can be arranged more compactly inside the device, and can better withstand vibration and shock, thereby improving the reliability of the entire system; FPC can be customized in different shapes and sizes according to actual needs to meet various design requirements.

[0021] Due to the above advantages of FPC, the vehicle-mounted display screen pressure sensing system proposed in this application can meet the curved surface design requirements of the vehicle screen, as well as the lightweight and miniaturized design requirements, and can make the vehicle-mounted display screen pressure sensing system more stable when encountering bumps or collisions.

[0022] The discrete device or integrated circuit serves as an intermediate device to connect the pressure sensing diaphragm and the processor. The discrete device or integrated circuit receives the signal generated by the pressure sensing diaphragm, generates an interrupt signal and sends it to the processor. The processor obtains Wheatstone resistance matrix information according to the interrupt signal.

[0023] In a second aspect, the present application proposes a vehicle-mounted pressure sensing method, the vehicle-mounted pressure sensing method comprising:

[0024] S1: The pressure sensing diaphragm obtains pressure monitoring information.

[0025] S2: The processor constructs a Wheatstone matrix table according to the pressure monitoring information.

[0026] S3: The processor obtains the specific position of the pressure sensing according to the Wheatstone matrix table.

[0027] The vehicle-mounted pressure sensing method proposed in the present application obtains the specific position of pressure sensing through a pressure sensing diaphragm and a processor, wherein the Wheatstone resistance matrix included in the pressure sensing diaphragm constructs a Wheatstone matrix table through the Wheatstone resistance matrix, which can more accurately identify the specific position where pressure is applied and improve the accuracy of pressure sensing. Through the scheme proposed in the present application, the accuracy of vehicle-mounted pressure sensing detection can be improved and full-screen pressure sensing can be achieved.

[0028] The Wheatstone bridge is a circuit configuration used to measure resistance, often used to accurately measure unknown resistance values. It consists of four resistors that form a bridge circuit. The Wheatstone bridge makes measurements by comparing the voltage across a known resistor to the voltage across an unknown resistor. When the bridge is balanced (no current is flowing through the detection ammeter), the unknown resistance can be calculated from the values ​​of the known resistors.

[0029] The Wheatstone bridge can accurately measure changes in resistance and is suitable for high-precision sensors and measurement systems. The Wheatstone bridge can reduce the impact of temperature changes and power supply fluctuations on measurement results and improve measurement stability. In addition, the Wheatstone bridge circuit design is relatively simple and easy to implement and maintain.

[0030] These changes in resistance are sensed by the Wheatstone bridge circuit, which consists of four resistors, one or more of which are part of the pressure-sensing diaphragm. The change in resistance caused by the deformation results in a change in the bridge output voltage. The amount of change in the bridge output voltage is proportional to the applied pressure, and these changes are ultimately recorded as pressure monitoring information.

[0031] Furthermore, the step S1 is specifically as follows:

[0032] The screen glass cover is squeezed, causing the pressure-sensitive diaphragm to deform.

[0033] Based on the deformation amount, the Wheatstone resistance matrix generates a change amount, which is recorded as pressure monitoring information.

[0034] Furthermore, the pressure monitoring information includes:

[0035] The amount of change caused by the deformation of each Wheatstone bridge in the Wheatstone resistance matrix.

[0036] Furthermore, the Wheatstone matrix table is specifically:

[0037] A matrix table formed by the variation of each Wheatstone bridge in the Wheatstone resistance matrix;

[0038] The position of the variation of the deformation amount of each Wheatstone bridge in the Wheatstone matrix table corresponds to its position in the Wheatstone resistance matrix.

[0039] The step S3 is specifically as follows:

[0040] All the changes in the Wheatstone matrix table are read and sorted to obtain the maximum change. The position of the pressure sensing diaphragm corresponding to the Wheatstone bridge corresponding to the maximum change is the specific position of pressure sensing.

[0041] By constructing a Wheatstone matrix, the specific location of pressure sensing can be intuitively observed, because the output values ​​of each sensor in the matrix change with the change of the center of pressure position. Specifically, the sensor at the center of pressure sensing will show the largest change, and the farther the sensor is from the center of pressure, the smaller the output change will be until it approaches zero. This gradient change pattern allows precise positioning of the location where pressure is applied, and can help to more effectively analyze pressure distribution, thereby optimizing the response and adjustment of the vehicle system.

[0042] Furthermore, the step S2 further includes:

[0043] The temperature compensation detection information of the pressure sensing diaphragm is provided to the processor, and the processor generates temperature compensation information in combination with the temperature drift coefficient of the resistor to compensate the pressure monitoring information.

[0044] By providing the current resistor temperature to the processor and compensating the Wheatstone matrix table in combination with the temperature drift coefficient of the resistor, a more accurate Wheatstone matrix table can be obtained, thereby obtaining more accurate pressure sensing position information.

[0045] Furthermore, before step S1, the method further includes:

[0046] The channel data of each Wheatstone bridge in the Wheatstone resistance matrix is ​​compared with the standard channel data to determine whether the comparison result is qualified. If qualified, the process proceeds to step S1; if unqualified, the vehicle display screen pressure sensing system is turned off.

[0047] The Wheatstone bridge may age or become damaged during use, affecting its measurement accuracy. Therefore, to ensure the accuracy of the Wheatstone matrix table, the bridge must be tested before use. This testing process can identify potential faults or inconsistencies, thereby avoiding inaccurate measurement results in actual applications. Regular testing and calibration can ensure that the Wheatstone bridge maintains its high-precision performance and provides reliable pressure sensing data.

[0048] In a third aspect, based on the same inventive concept, the present application also proposes a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a control processor, the vehicle-mounted pressure sensing method as described in the second aspect is implemented.

[0049] In summary, the present application proposes a vehicle-mounted display screen pressure sensing system, which includes a screen glass cover, a display module and a pressure sensing diaphragm, and the pressure sensing diaphragm is placed between the screen glass cover and the display module. A plurality of Wheatstone bridges are arranged in the pressure sensing diaphragm to form a Wheatstone resistance matrix. By squeezing the screen glass cover, force can be transmitted to the Wheatstone resistance matrix and a Wheatstone matrix table can be generated. The vehicle-mounted pressure sensing method includes: the pressure sensing diaphragm obtains pressure monitoring information through the Wheatstone resistance matrix; the processor constructs a Wheatstone matrix table based on the pressure monitoring information; the processor obtains the specific position of pressure sensing according to the change value based on the Wheatstone matrix table. Through the scheme proposed in the present application, the accuracy of vehicle-mounted pressure sensing detection can be improved and full-screen pressure sensing can be achieved.

[0050] Compared with the prior art, this application has at least the following beneficial effects:

[0051] Simplify the structure of existing pressure sensing solutions, eliminate structural limitations, and adapt to various types of screens to achieve pressure sensing.

[0052] Implement narrow black borders and full-screen pressure sensitivity.

[0053] By increasing the number of detection circuits (Wheatstone bridges), the detection accuracy can be improved.

[0054] The detection accuracy can be improved by adding a temperature compensation circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a stacking diagram of the vehicle-mounted display screen pressure sensing system shown in the embodiment of the present application.

[0056] Figure 2 1 is a system architecture diagram of a vehicle display screen pressure sensing system shown in an embodiment of the present application.

[0057] Figure 3 It is a schematic diagram of a Wheatstone bridge shown in an embodiment of the present application.

[0058] Figure 4 Schematic diagram of the Wheatstone resistor matrix shown in the embodiment of the present application.

[0059] Figure 5 It is a flow chart of the vehicle-mounted pressure sensing method shown in an embodiment of the present application. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0061] Embodiment 1:

[0062] The present application provides a vehicle-mounted display screen pressure sensing system, Figure 1 This is a stacked diagram of the pressure sensing system for the vehicle display screen. Figure 2 The system architecture diagram of the vehicle display screen pressure sensing system includes a screen glass cover, a display module and a pressure sensing diaphragm, wherein the pressure sensing diaphragm is placed between the screen glass cover and the display module.

[0063] in,

[0064] The pressure sensing diaphragm includes: a Wheatstone resistor matrix composed of N Wheatstone bridges, where N is a natural number greater than or equal to 1.

[0065] The display module also includes: a processor and discrete devices or integrated circuits below.

[0066] The pressure sensing diaphragm transmits pressure monitoring information and temperature compensation detection information to the discrete device or integrated circuit.

[0067] The discrete device or integrated circuit transmits pressure monitoring information and temperature compensation detection information to the processor.

[0068] In this design, the pressure-sensing diaphragm is placed between the screen glass cover and the display module, which can effectively cover the entire screen area. This layout enables the pressure-sensing diaphragm to sense pressure on the contact surface and transmit the pressure detection information to the display module. In order to ensure the accuracy and comprehensiveness of the sensing, the pressure-sensing diaphragm needs to have high sensitivity and uniform pressure response capabilities, and it needs to be well connected with the signal processing PCBA to achieve accurate data transmission and processing. This solution can reduce the black edge problem and improve the pressure sensing effect of the entire display area.

[0069] The pressure sensing diaphragm is equipped with a Wheatstone resistor matrix composed of N Wheatstone bridges. The Wheatstone bridge is used to improve the detection accuracy and sensitivity, and to combine the matrix and algorithm to determine the specific position of the pressure sensing.

[0070] As attached Figure 3 The figure below shows a schematic diagram of a Wheatstone bridge, a circuit structure used to improve detection accuracy and sensitivity, and convert single-ended data into differential data.

[0071] The potentials at points VD and VB can be calculated as follows. It can be seen that when the resistance value of R2 changes, the VBD voltage will change accordingly. At the same time, adjusting the resistance values ​​of R1, R3, and RX can adjust different output ranges.

[0072]

[0073] As attached Figure 4 The figure shows a schematic diagram of the Wheatstone resistor matrix.

[0074] Wheatstone resistance matrix: The underlying principle is to generate resistance changes through deformation to sense deformation, use Wheatstone bridge to improve detection accuracy and sensitivity, and use matrix and algorithm to determine the pressure coordinate position and improve accuracy.

[0075] In the implementation of the present invention, pressure sensing is optionally converted into electrical parameters: through pressure sensitive devices, such as resistance strain gauges (the body changes resistance through slight deformation), piezoresistive sensors (change carrier mobility through deformation, causing resistance to change), etc. The principle of this part is not limited, and only needs to meet the following requirements: ① It can be integrated on the diaphragm; ② The resistance value changes linearly, the sensing deformation range is wide, and the sensing resolution is high; ③ The single Wheatstone bridge layout ensures common ground and common power supply

[0076] In an embodiment of the present invention, optionally, the pressure sensing diaphragm is connected to the display module via a connector.

[0077] The connector includes: an FPC and an FPC connector.

[0078] In the embodiment of the present invention, optionally, the input end of the FPC is connected to the pressure sensing diaphragm, and the output end of the FPC is connected to the input end of the FPC connector.

[0079] In the embodiment of the present invention, optionally, the output end of the FPC connector is connected to the input end of the discrete device or integrated circuit.

[0080] In the embodiment of the present invention, optionally, the output terminal of the discrete device or integrated circuit is connected to the input terminal of the processor.

[0081] The solution proposed in this application uses FPC and FPC connector to connect the pressure sensing diaphragm and the display module; FPC can be bent and folded in multiple directions, making it suitable for application environments with limited space or irregular shapes, and the thickness of FPC is relatively thin, which is very suitable for lightweight and miniaturized design; due to the flexible characteristics of FPC, it can be arranged more compactly inside the device, and can better withstand vibration and shock, thereby improving the reliability of the entire system; FPC can be customized in different shapes and sizes according to actual needs to meet various design requirements.

[0082] Due to the above advantages of FPC, the vehicle-mounted display screen pressure sensing system proposed in this application can meet the curved surface design requirements of the vehicle screen, as well as the lightweight and miniaturized design requirements, and can make the vehicle-mounted display screen pressure sensing system more stable when encountering bumps or collisions.

[0083] The discrete device or integrated circuit serves as an intermediate device to connect the pressure sensing diaphragm and the processor. The discrete device or integrated circuit receives the signal generated by the pressure sensing diaphragm, generates an interrupt signal and sends it to the processor. The processor obtains Wheatstone resistance matrix information according to the interrupt signal.

[0084] Embodiment 2:

[0085] This application proposes a vehicle-mounted pressure sensing method, as shown in the attached Figure 5 As shown, the vehicle-mounted pressure sensing method includes:

[0086] S1: The pressure sensing diaphragm obtains pressure monitoring information.

[0087] S2: The processor constructs a Wheatstone matrix table according to the pressure monitoring information.

[0088] S3: The processor obtains the specific position of the pressure sensing according to the Wheatstone matrix table.

[0089] The vehicle-mounted pressure sensing method proposed in the present application obtains the specific position of pressure sensing through a pressure sensing diaphragm and a processor, wherein the Wheatstone resistance matrix included in the pressure sensing diaphragm constructs a Wheatstone matrix table through the Wheatstone resistance matrix, which can more accurately identify the specific position where pressure is applied and improve the accuracy of pressure sensing. Through the scheme proposed in the present application, the accuracy of vehicle-mounted pressure sensing detection can be improved and full-screen pressure sensing can be achieved.

[0090] The Wheatstone bridge is a circuit configuration used to measure resistance, often used to accurately measure unknown resistance values. It consists of four resistors that form a bridge circuit. The Wheatstone bridge makes measurements by comparing the voltage across a known resistor to the voltage across an unknown resistor. When the bridge is balanced (no current is flowing through the detection ammeter), the unknown resistance can be calculated from the values ​​of the known resistors.

[0091] The Wheatstone bridge can accurately measure changes in resistance and is suitable for high-precision sensors and measurement systems. The Wheatstone bridge can reduce the impact of temperature changes and power supply fluctuations on measurement results and improve measurement stability. In addition, the Wheatstone bridge circuit design is relatively simple and easy to implement and maintain.

[0092] In the embodiment of the present invention, optionally, the step S1 is specifically:

[0093] The screen glass cover is squeezed, causing the pressure-sensitive diaphragm to deform.

[0094] Based on the deformation amount, the Wheatstone resistance matrix generates a change amount, which is recorded as pressure monitoring information.

[0095] As a preferred embodiment, when the vehicle-mounted screen glass cover is squeezed, the applied pressure will cause the pressure-sensitive diaphragm to deform, and this deformation will cause the resistance in the diaphragm to change.

[0096] In this case, these changes in resistance are sensed by a Wheatstone bridge circuit, which consists of four resistors, one or more of which are part of the pressure-sensing diaphragm. The change in resistance caused by the deformation results in a change in the bridge output voltage. The amount of change in the bridge output voltage is proportional to the applied pressure, and these changes are ultimately recorded as pressure monitoring information.

[0097] The relationship between deformation and resistance is usually reflected through the piezoelectric effect or strain effect of the material. Specifically:

[0098] Piezoelectric effect: When pressure acts on a piezoelectric material, it generates an electric charge, which affects a change in resistance. Although this effect is not always directly relevant, in some sensors it can indirectly affect the resistance measurement.

[0099] Strain Effect: In a pressure sensing diaphragm, the applied pressure causes the diaphragm to deform. For some materials, this deformation causes the material's resistance to change. This is known as the strain resistance effect, where the material's resistance increases or decreases as the amount of deformation increases. This is often used in a Wheatstone bridge circuit, where the change in resistance caused by the deformation is converted into a voltage signal.

[0100] In a Wheatstone bridge circuit, the change in resistance caused by deformation results in a change in the bridge output voltage that is proportional to the applied pressure.

[0101] In the embodiment of the present invention, optionally, the pressure monitoring information includes:

[0102] The amount of change caused by the deformation of each Wheatstone bridge in the Wheatstone resistance matrix.

[0103] In the embodiment of the present invention, optionally, the Wheatstone matrix table is specifically:

[0104] A matrix table formed by the changes of each Wheatstone bridge in the Wheatstone resistance matrix.

[0105] The position of the variation of the deformation amount of each Wheatstone bridge in the Wheatstone matrix table corresponds to its position in the Wheatstone resistance matrix.

[0106] The step S3 is specifically as follows:

[0107] All the changes in the Wheatstone matrix table are read and sorted to obtain the maximum change. The position of the pressure sensing diaphragm corresponding to the Wheatstone bridge corresponding to the maximum change is the specific position of pressure sensing.

[0108] By constructing a Wheatstone matrix, the specific location of pressure sensing can be intuitively observed, because the output values ​​of each sensor in the matrix change with the change of the center of pressure position. Specifically, the sensor at the center of pressure sensing will show the largest change, and the farther the sensor is from the center of pressure, the smaller the output change will be until it approaches zero. This gradient change pattern allows precise positioning of the location where pressure is applied, and can help to more effectively analyze pressure distribution, thereby optimizing the response and adjustment of the vehicle system.

[0109] The following table shows a preferred Wheatstone matrix table given in this embodiment.

[0110] 1 1 1 1 1 1 1 0 1 2 2 2 2 2 1 0 1 2 3 3 3 2 1 0 1 2 3 4 3 2 1 0 1 2 3 3 3 2 1 0 1 2 2 2 2 2 1 0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0

[0111] From the matrix table, the largest change value appears at 4 in the center, and the pressure sensing diaphragm corresponding to this position is the specific position of pressure sensing. The change values ​​at other positions will gradually decrease as the distance from the center increases. This shows that the pressure sensing diaphragm at the center has the most significant change response, while the response is weakened at positions far from the center.

[0112] In the embodiment of the present invention, optionally, the step S2 further includes:

[0113] The temperature compensation detection information of the pressure sensing diaphragm is provided to the processor, and the processor generates temperature compensation information in combination with the temperature drift coefficient of the resistor to compensate the pressure monitoring information.

[0114] By providing the current resistor temperature to the processor and compensating the Wheatstone matrix table in combination with the temperature drift coefficient of the resistor, a more accurate Wheatstone matrix table can be obtained, thereby obtaining more accurate pressure sensing position information.

[0115] As a preferred embodiment, an NTC (negative temperature coefficient) thermistor can be used to compensate for the effect of temperature change on resistance measurement. Specifically:

[0116] Function of NTC thermistor: The resistance value of NTC thermistor decreases as the temperature increases. By using NTC thermistor together with pressure sensing diaphragm, the temperature change of the diaphragm can be monitored in real time.

[0117] The processor receives temperature data from the NTC thermistor and uses this data to compensate for the temperature drift coefficient of the Wheatstone resistor matrix (i.e., the degree to which the resistance changes with temperature). This can accurately adjust the resistance measurement value to eliminate the interference of temperature changes on the pressure sensing results.

[0118] By connecting the NTC thermistor in series or in parallel with the pressure sensing diaphragm, the sensor system will read both pressure and temperature data. The processor will use this information to perform temperature compensation, ensuring that the final output data is more accurate and reliable.

[0119] This method can effectively improve the stability and accuracy of the system under various temperature conditions.

[0120] In the embodiment of the present invention, optionally, before step S1, the following step is further included:

[0121] The channel data of each Wheatstone bridge in the Wheatstone resistance matrix is ​​compared with the standard channel data to determine whether the comparison result is qualified. If qualified, the process proceeds to step S1; if unqualified, the vehicle display screen pressure sensing system is turned off.

[0122] The Wheatstone bridge may age or become damaged during use, affecting its measurement accuracy. Therefore, to ensure the accuracy of the Wheatstone matrix table, the bridge must be tested before use. This testing process can identify potential faults or inconsistencies, thereby avoiding inaccurate measurement results in actual applications. Regular testing and calibration can ensure that the Wheatstone bridge maintains its high-precision performance and provides reliable pressure sensing data.

[0123] Embodiment three:

[0124] Based on the same inventive concept, the present application also proposes a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are executed by a control processor, the vehicle-mounted pressure sensing method as described in the second aspect is implemented.

[0125] In the computer-readable storage medium, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state hard disk SolidState Disk (SSD)), etc.

[0126] In summary, the present application proposes a vehicle-mounted display screen pressure sensing system, which includes a screen glass cover, a display module and a pressure sensing diaphragm, and the pressure sensing diaphragm is placed between the screen glass cover and the display module. A plurality of Wheatstone bridges are arranged in the pressure sensing diaphragm to form a Wheatstone resistance matrix. By squeezing the screen glass cover, force can be transmitted to the Wheatstone resistance matrix and a Wheatstone matrix table can be generated. The vehicle-mounted pressure sensing method includes: the pressure sensing diaphragm obtains pressure monitoring information through the Wheatstone resistance matrix; the processor constructs a Wheatstone matrix table based on the pressure monitoring information; the processor obtains the specific position of pressure sensing according to the numerical value based on the Wheatstone matrix table. Through the scheme proposed in the present application, the accuracy of vehicle-mounted pressure sensing detection can be improved and full-screen pressure sensing can be realized.

[0127] This application achieves:

[0128] Simplify the structure of existing pressure sensing solutions, eliminate structural limitations, and adapt to various types of screens to achieve pressure sensing.

[0129] Implement narrow black borders and full-screen pressure sensitivity.

[0130] By increasing the number of detection circuits (Wheatstone bridges), the detection accuracy can be improved.

[0131] The detection accuracy can be improved by adding a temperature compensation circuit.

[0132] In several embodiments provided in the present application, it is understood that each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved.

[0133] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for enabling an electronic device to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0134] The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the scope of protection of the present application. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A vehicle-mounted display screen pressure sensing system, comprising a screen glass cover, a display module and a pressure sensing diaphragm, characterized in that: The pressure-sensitive diaphragm is placed between the screen glass cover and the display module; in, The pressure sensing diaphragm includes: a Wheatstone resistor matrix composed of N Wheatstone bridges, where N is a natural number greater than or equal to 1; and below the display module also includes: a processor and discrete devices or integrated circuits; The pressure sensing diaphragm transmits pressure monitoring information and temperature compensation detection information to the discrete device or integrated circuit; The discrete device or integrated circuit transmits pressure monitoring information and temperature compensation detection information to the processor.

2. The vehicle-mounted display screen pressure sensing system according to claim 1, characterized in that: The pressure sensing diaphragm is connected to the display module via a connector; The connector includes: an FPC and an FPC connector.

3. The vehicle-mounted display screen pressure sensing system according to claim 2, characterized in that: The input end of the FPC is connected to the pressure sensing diaphragm, and the output end of the FPC is connected to the input end of the FPC connector; the output end of the FPC connector is connected to the input end of the discrete device or integrated circuit; The discrete device or integrated circuit output terminal is connected to the processor input terminal.

4. A vehicle-mounted pressure sensing method based on the vehicle-mounted display screen pressure sensing system according to any one of claims 1 to 3, the vehicle-mounted pressure sensing method comprising: S1: pressure sensing diaphragm obtains pressure monitoring information; S2: The processor constructs a Wheatstone matrix table according to the pressure monitoring information; S3: The processor obtains the specific position of the pressure sensing according to the Wheatstone matrix table.

5. The vehicle-mounted pressure sensing method according to claim 4, characterized in that: The step S1 is specifically as follows: The screen glass cover is squeezed, and the pressure-sensitive diaphragm generates a deformation amount; Based on the deformation amount, the Wheatstone resistance matrix generates a change amount, which is recorded as pressure monitoring information.

6. The vehicle-mounted pressure sensing method according to claim 5, characterized in that: The pressure monitoring information includes: The amount of change caused by the deformation of each Wheatstone bridge in the Wheatstone resistance matrix.

7. The vehicle-mounted pressure sensing method according to claim 6, characterized in that: The Wheatstone matrix table is specifically: A matrix table formed by the variation of each Wheatstone bridge in the Wheatstone resistance matrix; The position of the variation of the deformation amount of each Wheatstone bridge in the Wheatstone matrix table corresponds to its position in the Wheatstone resistance matrix; The step S3 is specifically as follows: All the changes in the Wheatstone matrix table are read and sorted to obtain the maximum change. The position of the pressure sensing diaphragm corresponding to the Wheatstone bridge corresponding to the maximum change is the specific position of pressure sensing.

8. The vehicle-mounted pressure sensing method according to claim 4, characterized in that: The step S2 further comprises: The temperature compensation detection information of the pressure sensing diaphragm is provided to the processor, and the processor generates temperature compensation information in combination with the temperature drift coefficient of the resistor to compensate the pressure monitoring information.

9. The vehicle-mounted pressure sensing method according to claim 4, characterized in that: Before step S1, the method further includes: The channel data of each Wheatstone bridge in the Wheatstone resistance matrix is ​​compared with the standard channel data to determine whether the comparison result is qualified. If qualified, the process proceeds to step S1; if unqualified, the vehicle display screen pressure sensing system is turned off.

10. A computer-readable storage medium storing computer-executable instructions, characterized in that: When the computer executable instructions are executed by the control processor, the vehicle-mounted pressure sensing method as described in any one of claims 4 to 9 is implemented.

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