An electronic device

Abstract

The present application discloses an electronic device, belonging to the field of intelligent devices. The electronic device includes a screen, N pressure sensing modules, a microcontroller unit MCU and a pressure sensing signal processor; N pressure sensing modules are arranged below the screen, and N is a positive integer greater than 1; the pressure sensing module is connected to the MCU, and is used to generate a voltage signal after detecting a pressing operation; wherein the voltage signal includes a positive voltage signal and a negative voltage signal; the MCU is connected to the pressure sensing signal processor, and is used to convert the voltage signal into a pressure sensing signal, wherein the pressure sensing signal includes: a positive signal corresponding to the positive voltage signal and a negative signal corresponding to the negative voltage signal; the pressure sensing signal processor is used to receive the pressure sensing signal transmitted by the MCU and process the pressure sensing signal; wherein processing the pressure sensing signal refers to reverse linear processing of the positive signal and the negative signal.

Description

Technical Field

[0001] The present application belongs to the field of smart devices, and specifically relates to an electronic device. Background Art

[0002] Existing terminals have integrated the under-screen pressure sensing function based on the piezoresistive effect, that is, the terminal includes two sets of pressure sensing modules with parallel channel structures. However, in order to avoid other components of the whole machine such as the camera, the pressure sensing module of the parallel channel structure chooses to place the upper pressure sensing module vertically to solve the stacking space problem. Figure 1 As shown, the longitudinal signal sensing area of ​​the vertically placed upper pressure sensing module is very limited. Therefore, although the pressure sensing signal can be detected at a place far away from the pressure sensing module, a negative signal is detected, and the amplitude of the negative signal increases with the distance from the pressed area, thereby affecting the detection accuracy of the pressure sensing signal and further narrowing the detection range of the pressure sensing signal. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide an electronic device that can solve the problem in the prior art that although pressure signals can be detected at places far away from the pressure sensing module, negative signals are detected, resulting in inaccurate pressure signals and a small pressure sensing detection range.

[0004] In the first aspect, an embodiment of the present application provides an electronic device, which includes a screen, N pressure sensing modules, a microcontroller unit MCU and a pressure sensing signal processor; the N pressure sensing modules are arranged below the screen, and N is a positive integer greater than 1; the pressure sensing module is connected to the MCU, and is used to generate a voltage signal after detecting a pressing operation; wherein the voltage signal includes a positive voltage signal and a negative voltage signal; the MCU is connected to the pressure sensing signal processor, and is used to convert the voltage signal into a pressure sensing signal, wherein the pressure sensing signal includes: a positive signal corresponding to the positive voltage signal and a negative signal corresponding to the negative voltage signal; the pressure sensing signal processor is used to receive the pressure sensing signal transmitted by the MCU and process the pressure sensing signal; wherein processing the pressure sensing signal refers to reverse linear processing of the positive signal and the negative signal.

[0005] In an embodiment of the present application, the pressure-sensing signal processor 86 in the electronic device can perform reverse linear processing on the positive signal and the negative signal, that is, extract the values ​​corresponding to the positive signal and the negative signal, and then perform negative correlation processing on the values ​​of the two. Since in the prior art, when the distance between the pressing position and the steel sheet arm of the pressure-sensing module exceeds a certain threshold, a negative differential voltage is finally output, by performing reverse linear processing on the positive and negative signals in the present application, the accurate pressing pressure can be detected according to the detected negative signal, thereby obtaining an accurate pressure-sensing signal, that is, the range of pressure-sensing detection is improved, thereby solving the problem in the prior art that although the pressure-sensing signal can be detected for a place far away from the pressure-sensing module, the negative signal is detected, resulting in an inaccurate pressure-sensing signal and a smaller pressure-sensing detection range. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the placement of the pressure sensing module in the prior art;

[0007] Figure 2 This is one of the schematic diagrams of deformation of the pressure sensing module in the embodiment of the present application;

[0008] Figure 3 This is the second schematic diagram of the deformation of the pressure sensing module in the embodiment of the present application;

[0009] Figure 4 This is the third schematic diagram of the deformation of the pressure sensing module in the embodiment of the present application;

[0010] Figure 5 This is the fourth schematic diagram of the deformation of the pressure sensing module in the embodiment of the present application;

[0011] Figure 6 This is the fifth schematic diagram of the deformation of the pressure sensing module in the embodiment of the present application;

[0012] Figure 7 This is the sixth schematic diagram of the deformation of the pressure sensing module in the embodiment of the present application;

[0013] Figure 8 is a schematic diagram of the structure of an electronic device according to an embodiment of the present application;

[0014] Fig. 9 is a schematic diagram of the region where the pressure sensing module of the embodiment of the present application generates positive and negative voltage signals;

[0015] Fig.10 It is a schematic diagram of processing pressure-sensing signals in the prior art;

[0016] Fig.11 It is a deformation diagram of a dual-channel pressure sensing module in the prior art;

[0017] Fig.12 It is a schematic diagram of the placement of a dual-channel pressure sensing module in the prior art;

[0018] Fig.13 is a schematic comparison diagram of a single channel and a dual channel in an embodiment of the present application;

[0019] Fig.14 This is one of the schematic diagrams of the placement of the pressure sensing module in the embodiment of the present application;

[0020] Fig.15 This is the second schematic diagram of the placement of the pressure sensing module in the embodiment of the present application;

[0021] Fig.16 It is a schematic diagram of the arrangement of a three-section FPC and a pressure sensing module in the prior art;

[0022] Fig.17 It is a schematic diagram of the placement of the direct-pull FPC and the pressure sensing module in the embodiment of the present application. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0024] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0025] First, the pressure sensing signal generated by the pressing operation in the embodiment of the present application is explained.

[0026] like Figure 2 As shown, the pressure sensing module will not deform in a static state, that is, when there is no pressing operation, but the deformation resistor will deform accordingly under the pressing operation. Figure 3 As shown in the figure, the screen is pressed at three positions, A, B, and C. Since the bottom of the pressure-sensing module is coated with glue, the function test is performed under the screen by maintaining pressure. Each pressing operation is a process of rigid deformation for the screen. When pressing at position A, the pressing position is close to the channel of the pressure-sensing module. The pressing deformation is directly transmitted to the module channel according to the transfer model. The deformation is as follows Figure 4When pressing at position B, since position B is farther from the pressure sensing module channel and the module steel sheet arm than position A, the pressure deformation can still be transmitted in the positive direction despite the distance, causing the pressure sensing module steel sheet to deflect toward the negative half axis of the Z direction of the whole machine, but the degree of deflection is much lighter than that of position A, and the output differential voltage is smaller. Its deformation is as shown in the figure below. Figure 5 When the distance between the pressing position and the steel arm of the pressure sensing module exceeds a certain threshold, such as position C, each time the screen is pressed, the stress transmitted in the positive direction is transmitted to the top of the module channel, and the deformation component borne by the steel arm is not enough to separate the two steel arms and make them shift toward the predetermined Z negative semi-axis. Instead, the entire pressure sensing module will be warped in the positive Z space along with the screen. In theory, its deformation is as follows Figure 6 As shown. At this time, the pressure sensing module no longer outputs the predetermined positive differential voltage normally. Furthermore, since the steel sheet arm is attached to the bottom of the screen, its rigidity is much higher than that of the screen. Therefore, when the screen wants to drive the steel sheet to lift up to the positive half axis in the Z direction, the steel sheet receiving channel will be affected by the lever, causing the upper half of the steel sheet to be lifted up with the screen without stress, which is equivalent to the reverse action module of the lower half of the steel sheet. Its deformation is as shown in Figure 7 As shown, the final result is characterized by pressing the screen downward, the module steel sheet deforms upward and pulls the channel, that is, a negative differential voltage is finally output.

[0027] The electronic device provided in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0028] like Figure 8 As shown, the electronic device in the embodiment of the present application includes N pressure sensing modules 82, a micro control unit MCU84, a pressure sensing signal processor 86 and a screen 88; the N pressure sensing modules are arranged below the screen, and N is a positive integer greater than 1;

[0029] The pressure sensing module 82 is connected to the MCU 84 and is used to generate a voltage signal after detecting a pressing operation; wherein the voltage signal includes a positive voltage signal and a negative voltage signal;

[0030] MCU84, connected to the pressure-sensing signal processor 86, is used to convert the voltage signal into a pressure-sensing signal, wherein the pressure-sensing signal includes: a positive signal corresponding to the positive voltage signal and a negative signal corresponding to the negative voltage signal;

[0031] The pressure-sensing signal processor 86 is used to receive the pressure-sensing signal transmitted by the MCU 84 and process the pressure-sensing signal; wherein, processing the pressure-sensing signal refers to performing reverse linear processing on the positive signal and the negative signal.

[0032] It can be seen that in the embodiment of the present application, the pressure-sensing signal processor 86 in the electronic device can perform reverse linear processing on the positive signal and the negative signal, that is, extract the values ​​corresponding to the positive signal and the negative signal, and then perform negative correlation processing on the values ​​of the two. Since in the prior art, when the distance between the pressing position and the steel sheet arm of the pressure-sensing module exceeds a certain threshold, a negative differential voltage is finally output, by performing reverse linear processing on the positive and negative signals in the present application, the accurate pressing pressure can be detected according to the detected negative signal, thereby obtaining an accurate pressure-sensing signal, that is, the range of pressure-sensing detection is improved, thereby solving the problem in the prior art that although the pressure-sensing signal can be detected for a place far away from the pressure-sensing module, the negative signal is detected, resulting in an inaccurate pressure-sensing signal and a smaller pressure-sensing detection range.

[0033] It should be noted that the electronic device in the embodiments of the present application may be a smart device such as a mobile phone, a tablet, or a smart watch.

[0034] In an optional implementation manner of the embodiment of the present application, if Fig. 9 As shown, the pressure sensing module generates a positive voltage signal after detecting a pressing operation in the first area centered on the pressure sensing module, that is, Fig. 9 The area inside the solid coil is the first area that generates a positive signal. The pressure sensing module generates a negative voltage signal after detecting a pressing operation in the second area; wherein the second area is the area of ​​the third area except the first area, that is, Fig. 9 The area outside the solid circle in the middle dotted circle, the third area ( Fig. 9 The area within the middle dotted circle is an area centered on the pressure sensing module and covering a larger area than the first area.

[0035] Based on this, the pressure sensing signal is processed as follows in the embodiment of the present application: Fig.10 As shown, the AP (Application Processor) end includes a pressure-sensitive signal processor, that is, after the pressure-sensitive module detects a pressing operation, the positive voltage signal and the negative voltage signal generated are input into the MCU, and then the positive voltage signal and the negative voltage signal are converted into corresponding pressure-sensitive signals. The positive signal and the negative signal are subjected to reverse linear processing by the pressure-sensitive signal processor on the AP end, that is, the original negative signal can be subjected to reverse linear processing to obtain the corresponding positive signal, that is, the area that was originally unable to detect the correct signal can also sense the positive signal through the method of the embodiment of the present application, so as to expand the pressure-sensitive detection range.

[0036] The design of pressure sensing modules in the prior art, including the dual-channel FPC laminate structure, is based on the Wheatstone bridge detection solution, using steel sheets and grabbing deformation resistors to achieve pressure detection. Each channel has four steel sheets and two channels of deformation resistor detection. The implementation principle is as follows Fig.11As shown, R1, R2, R3, and R4 are deformation resistors. Based on this, the arrangement method of the pressure sensing module in the prior art is as follows Fig.12 shown.

[0037] In an optional implementation of the embodiment of the present application, the pressure sensing module in the embodiment of the present application is a single-channel pressure sensing module, and some or all of the N single-channel pressure sensing modules are dispersedly arranged in the electronic device. Fig.13 As shown, the left side is a dual-channel pressure sensing module, and the right side is a single-channel pressure sensing module.

[0038] like Fig.14 As shown, when the value of N is 4, the four single-channel pressure sensing modules are divided into a first pressure sensing module and a second pressure sensing module; the first pressure sensing module and the second pressure sensing module respectively include two single-channel pressure sensing modules; at least one of the first pressure sensing module and the second pressure sensing module is dispersedly arranged in the electronic device; the first pressure sensing module and the second pressure sensing module are arranged horizontally in the electronic device, and the first pressure sensing module is arranged in the fourth area of ​​the electronic device, and the second pressure sensing module is arranged in the fifth area of ​​the electronic device; the fourth area is an area including the camera module in the two areas where the electronic device is divided by a central horizontal line, and the fifth area is an area not including the camera module in the two areas.

[0039] When the value of N is 4, Fig.15 As shown, two of the four single-channel pressure sensing modules are dispersedly arranged in the electronic device, and the remaining two single-channel modules are still combined into a dual-channel pressure sensing module and then arranged in the electronic device. Since the single-channel modules are dispersedly arranged in the electronic device, the single-channel pressure sensing modules can be arranged in corresponding positions as needed. In the prior art, since the dual-channel pressure sensing modules are limited by the dual-channel structure of the modules, they cannot be placed in corresponding positions as needed. By dispersing the two single-channel modules, the detection range of the pressure sensing signal can be expanded.

[0040] It should be noted that when the value of N is 4, four single-channel modules can be stacked freely, thus avoiding the problem of small detection area of ​​the pressure sensing module of the dual-channel combination. Moreover, the free stacking of four single-channel modules does not affect the sensitivity of pressure sensing signal detection, making the overall signal detection mechanism more perfect.

[0041] In an optional implementation of an embodiment of the present application, N single-channel pressure sensing modules include a first pressure sensing module and a second pressure sensing module; at least one of the first pressure sensing module and the second pressure sensing module is dispersedly arranged in the electronic device; the first pressure sensing module is arranged in a fourth area of ​​the electronic device, and the second pressure sensing module is arranged in a fifth area of ​​the electronic device; the fourth area is an area including a camera module in two areas where the electronic device is divided by a central horizontal line, and the fifth area is an area that does not include the camera module in the two areas.

[0042] In an optional implementation of the embodiment of the present application, when the value of N is 4, the first pressure sensing module includes two single-channel pressure sensing modules, and the second pressure sensing module includes two single-channel pressure sensing modules; wherein the two single-channel pressure sensing modules in the first pressure sensing module are dispersedly arranged in the fourth area; and the two single-channel pressure sensing modules in the second pressure sensing module form a parallel channel and are arranged in the fifth area. Fig.15 As shown, the fourth area includes two single-channel modules, which are the first pressure sensing modules, and the fifth area includes two single-channel modules, which are the second pressure sensing modules. Of course, the above is only an example of N being 4. If N is other values, a corresponding number of single-channel pressure sensing modules can be set in the fourth area and the fifth area according to needs.

[0043] In an optional implementation manner of the embodiment of the present application, at least one of the first pressure sensing module and the second pressure sensing module is dispersedly disposed in the electronic device and includes at least one of the following:

[0044] 1) Each single-channel pressure sensing module of the first pressure sensing module and the second pressure sensing module is dispersedly arranged in the electronic device;

[0045] 2) The single-channel pressure sensing modules in the first pressure sensing module are all dispersedly arranged in the electronic device, and the single-channel pressure sensing modules in the second pressure sensing module are arranged in pairs to form parallel channels in the electronic device; that is, Fig.13 The setting method of the single-channel pressure sensing module is shown.

[0046] 3) The single-channel pressure sensing modules in the second pressure sensing module are all dispersedly arranged in the electronic device, and the single-channel pressure sensing modules in the first pressure sensing module are arranged in pairs to form parallel channels in the electronic device.

[0047] That is to say, in the embodiment of the present application, the placement positions of the first pressure sensing module and the second pressure sensing module in the electronic device content can be set as needed.

[0048] In the prior art, the three-section type in electronic equipment refers to a flexible printed circuit (FPC). In order to avoid the FPC wiring, the whole device is made thinner, such as Fig.16 As shown. However, this arrangement means that the pressure sensing module needs to be close to the side of the electronic device and cannot be set in the center. Although the entire device does not become thicker, the pressure sensing detection range becomes smaller. Therefore, in an optional implementation of an embodiment of the present application, the electronic device in the embodiment of the present application also includes a straight-pull FPC; the straight-pull FPC is longitudinally arranged close to one side of the electronic device; and N single-channel pressure sensing modules are arranged in the electronic device along the longitudinal center line of the electronic device.

[0049] like Fig.17 As shown, when the value of N is 4, the four single-channel pressure sensing modules are divided into a first pressure sensing module and a second pressure sensing module; the first pressure sensing module and the second pressure sensing module respectively include two single-channel pressure sensing modules; the first pressure sensing module is arranged in the fourth area of ​​the electronic device along the longitudinal center line of the electronic device, and the second pressure sensing module is arranged in the fifth area of ​​the electronic device along the longitudinal center line of the electronic device; the fourth area is an area including the camera module in the two areas where the electronic device is divided by the central horizontal line, and the fifth area is an area not including the camera module in the two areas.

[0050] In an optional implementation of the embodiment of the present application, the placement direction of the single-channel pressure sensing module in the electronic device includes at least one of the following: horizontally arranged in the electronic device, vertically arranged in the electronic device. Fig.14 and 15 The single channel mode in is set horizontally. Fig.16 and 17 The single-channel module in the vertical arrangement is based on this, and for the direct-pull FPC, the overlap between the two can be avoided by setting a vertically arranged pressure-sensing module.

[0051] It should be noted that the horizontal setting and vertical setting in the embodiments of the present application refer to the horizontal setting and vertical setting of the pressure sensing module relative to the normal operating posture of the electronic device. For example, the normal operating posture of a mobile phone is to hold the mobile phone vertically, and the normal operating posture of a tablet computer is to hold the tablet computer horizontally.

[0052] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An electronic device, characterized in that: The electronic device comprises a screen, N pressure sensing modules, a microcontroller unit MCU and a pressure sensing signal processor; the N pressure sensing modules are arranged below the screen, and N is a positive integer greater than 1; The pressure sensing module is connected to the MCU and is used to generate a voltage signal after detecting a pressing operation; wherein the voltage signal includes a positive voltage signal and a negative voltage signal; The MCU is connected to the pressure-sensing signal processor and is used to convert the voltage signal into a pressure-sensing signal, wherein the pressure-sensing signal includes: a positive signal corresponding to the positive voltage signal and a negative signal corresponding to the negative voltage signal; The pressure-sensing signal processor is used to receive the pressure-sensing signal transmitted by the MCU and process the pressure-sensing signal; wherein, processing the pressure-sensing signal refers to performing reverse linear processing on the positive signal and the negative signal.

2. The electronic device according to claim 1, characterized in that The pressure sensing module generates the positive voltage signal after detecting a pressing operation in a first area centered on the pressure sensing module, and generates the negative voltage signal after detecting a pressing operation in a second area; wherein the second area is an area of ​​the third area excluding the first area, and the third area is an area centered on the pressure sensing module and covering a larger range than the first area.

3. The electronic device according to claim 1, characterized in that The pressure sensing module is a single-channel pressure sensing module, and some or all of the N single-channel pressure sensing modules are dispersedly arranged in the electronic device.

4. The electronic device according to claim 3, characterized in that The N single-channel pressure sensing modules include a first pressure sensing module and a second pressure sensing module; at least one of the first pressure sensing module and the second pressure sensing module is dispersedly disposed in the electronic device; The first pressure sensing module is arranged in the fourth area of ​​the electronic device, and the second pressure sensing module is arranged in the fifth area of ​​the electronic device; The fourth area is an area including the camera module among the two areas divided by the central horizontal line of the electronic device, and the fifth area is an area not including the camera module among the two areas.

5. The electronic device according to claim 4, characterized in that At least one of the first pressure sensing module and the second pressure sensing module is dispersedly disposed in the electronic device and includes at least one of the following: Each single-channel pressure sensing module of the first pressure sensing module and the second pressure sensing module is dispersedly arranged in the electronic device; The single-channel pressure sensing modules in the first pressure sensing module group are all dispersedly arranged in the electronic device, and the single-channel pressure sensing modules in the second pressure sensing module group are arranged in pairs to form parallel channels in the electronic device; The single-channel pressure sensing modules in the second pressure sensing modules are all dispersedly arranged in the electronic device, and the single-channel pressure sensing modules in the first pressure sensing modules are arranged in pairs to form parallel channels in the electronic device.

6. The electronic device according to claim 4, characterized in that When the value of N is 4, the first pressure sensing module includes two single-channel pressure sensing modules, and the second pressure sensing module includes two single-channel pressure sensing modules; Two single-channel pressure sensing modules in the first pressure sensing module are dispersedly arranged in the fourth area; Two single-channel pressure sensing modules in the second pressure sensing module form parallel channels and are arranged in the fifth area.

7. The electronic device according to claim 3, characterized in that The electronic device further comprises a straight-pull FPC; the straight-pull FPC is longitudinally arranged close to one side of the electronic device; N single-channel pressure sensing modules are arranged in the electronic device along the longitudinal center line of the electronic device.

8. The electronic device according to claim 7, characterized in that When the value of N is 4, the four single-channel pressure sensing modules are divided into a first pressure sensing module and a second pressure sensing module; the first pressure sensing module and the second pressure sensing module include two single-channel pressure sensing modules respectively; The first pressure sensing module is arranged in the fourth area of ​​the electronic device along the longitudinal center line of the electronic device, and the second pressure sensing module is arranged in the fifth area of ​​the electronic device along the longitudinal center line of the electronic device; the fourth area is an area including the camera module that divides the electronic device into two areas by the central horizontal line, and the fifth area is an area that does not include the camera module among the two areas.

9. The electronic device according to claim 3, characterized in that When the value of N is 4, the four single-channel pressure sensing modules are divided into a first pressure sensing module and a second pressure sensing module; the first pressure sensing module and the second pressure sensing module include two single-channel pressure sensing modules respectively; At least one of the first pressure sensing module and the second pressure sensing module is dispersedly disposed in the electronic device; The first pressure sensing module and the second pressure sensing module are arranged transversely in the electronic device, and the first pressure sensing module is arranged in the fourth area of ​​the electronic device, and the second pressure sensing module is arranged in the fifth area of ​​the electronic device; The fourth area is an area including the camera module among the two areas divided by the central horizontal line of the electronic device, and the fifth area is an area not including the camera module among the two areas.

10. The electronic device according to claim 3, characterized in that The placement direction of the single-channel pressure sensing module in the electronic device includes at least one of the following: horizontally arranged in the electronic device, and vertically arranged in the electronic device.

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