Intelligent turnover camera module and electronic equipment

Abstract

The invention relates to an intelligent turnover camera module and electronic equipment. The intelligent turnover camera module comprises a base, a camera module body, a piezoelectric driving assembly, a rotation matching assembly, a position sensing assembly and a signal and power supply assembly, the camera module body is connected to the base through a rotating shaft and can rotate around the rotating shaft; the piezoelectric driving assembly is connected with the camera module body and is used for generating driving force to enable the camera module body to rotate when being powered on and providing friction force for keeping the position of the camera module body stable when being powered off; the rotation matching assembly is arranged between the camera module body and the base and is used for guiding the camera module body to rotate around the rotating shaft when the piezoelectric driving assembly is electrified; the position sensing assembly is used for detecting current position information of the camera module body; the signal and power supply assembly is connected with the piezoelectric driving assembly and the position sensing assembly and used for receiving signals detected by the position sensing assembly and supplying power to the piezoelectric driving assembly and the position sensing assembly. According to the invention, the high distortion problem can be solved while the field angle is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of camera modules, and particularly relates to an intelligent flip camera module and an electronic device. Background Art

[0002] In the application scenarios of intelligent learning tablets, equipping with camera modules and supporting software to achieve automatic correction of students' homework and test papers has become an important means to improve learning efficiency and teaching management quality. However, in the actual application process of existing technical solutions, many defects that need to be overcome urgently have emerged.

[0003] On the one hand, in order to solve the problem of incomplete shooting of homework and test papers, some design teams have adopted camera modules with ultra-large viewing angles, such as a field of view angle reaching 120°. Although such camera modules can cover most of the shooting ranges of homework and test papers to a certain extent, the high distortion problem they bring has become a major obstacle affecting the accuracy of automatic correction. Usually, the distortion rate of such ultra-large viewing angle camera modules can reach about 10%. Such a high distortion rate will cause serious deformation of the text and patterns at the four corners of the test paper. When the supporting software corrects homework and test papers, this deformation will greatly increase the calculation difficulty of the software, and may even cause the software to be unable to accurately identify the content of the test paper, thus unable to achieve automatic correction of homework and time, seriously affecting the application effect of intelligent learning tablets in actual teaching scenarios.

[0004] On the other hand, in order to overcome the problems brought by the distortion of ultra-large viewing angle camera modules, some design teams have proposed to use two camera modules, and increase the field of view shooting range by means of complementary and superimposed fields of view angle, so as to improve the accuracy of homework and test paper correction. Although this solution can improve the shooting effect to a certain extent, it also brings new challenges. The use of two camera modules not only doubles the product cost, increasing the cost pressure of production and sales; but also occupies more space inside the tablet, which is undoubtedly a huge obstacle for intelligent learning tablets pursuing a thin and light design; in addition, the simultaneous operation of two camera modules will consume more battery energy, shortening the battery life of the tablet and affecting the user experience.

[0005] Therefore, it is necessary to develop a new intelligent flip camera module and an electronic device. Summary of the Invention

[0006] The purpose of the present invention is to provide an intelligent flip camera module and an electronic device, which can effectively solve the problem of high distortion while increasing the field of view angle.

[0007] An intelligent flip camera module described in the present invention includes a base, a camera module body, a piezoelectric drive assembly, a rotation matching assembly, a position sensing assembly, and a signal and power supply assembly; The camera module body is connected to the base through a rotating shaft and can rotate relative to the base around the rotating shaft; The piezoelectric drive assembly is connected to the camera module body and is used to generate a driving force to rotate the camera module body when powered on, and provide a frictional force to keep the position of the camera module body stable when powered off; The rotation matching assembly is arranged between the camera module body and the base and is used to guide the camera module body to rotate around the rotating shaft when the piezoelectric drive assembly is powered on; The position sensing assembly is used to detect the current position information of the camera module body; The signal and power supply assembly are respectively connected to the piezoelectric drive assembly and the position sensing assembly, and are used to receive the signals detected by the position sensing assembly and supply power to the piezoelectric drive assembly and the position sensing assembly.

[0008] Optionally, the piezoelectric drive assembly includes: A piezoelectric drive chip, which is used to receive an external control signal and output a corresponding drive voltage; A piezoelectric module, which is connected to the piezoelectric drive chip and deforms under the action of the drive voltage; A piezoelectric friction plate, which is arranged on the piezoelectric module. When the piezoelectric module is powered off, it prevents the camera module body from rotating through the frictional force between the contact surfaces with the base. The piezoelectric drive chip, as the control core, can accurately output the drive voltage according to the external control signal to achieve precise control of the deformation of the piezoelectric module. The piezoelectric module deforms under the drive voltage, converting electrical energy into mechanical energy, thereby generating a driving force to push the camera module body to rotate. And the piezoelectric friction plate provides frictional force when powered off, effectively preventing the camera module body from rotating undesirably due to external forces and other factors, ensuring the stability of the camera module body in a stationary state.

[0009] Optionally, the piezoelectric module is fixedly installed on the rigid-flexible board of the camera module body, and the deformation direction of the piezoelectric module is associated with the rotation direction of the camera module body to realize driving the camera module body to rotate around the rotating shaft. Fixing the piezoelectric module on the rigid-flexible board ensures a stable connection between the piezoelectric module and the camera module body, enabling the driving force generated by the piezoelectric module to be directly and effectively transmitted to the camera module body. By reasonably designing the association relationship between the deformation direction of the piezoelectric module and the rotation direction of the camera module body, the deformation of the piezoelectric module can be efficiently converted into the rotation of the camera module body, improving the driving efficiency and enabling the camera module body to rotate in the expected direction and angle.

[0010] Optionally, the rotation matching assembly includes: A ball fixing block, which is fixed on the camera module body; A ball is disposed on the ball fixing block and at least partially protrudes from the surface of the ball fixing block. An arc-shaped chute is disposed on the base. The ball can slide in the arc-shaped chute to guide the camera module body to rotate around the rotation axis. The ball fixing block fixes the ball on the camera module body to ensure the relative position stability between the ball and the camera module body. At least part of the ball protrudes from the surface of the ball fixing block so that it can contact the arc-shaped chute on the base. During the rotation of the camera module body, the ball slides in the arc-shaped chute. This rolling friction method greatly reduces the frictional resistance during rotation, making the rotation of the camera module body smoother and more flexible. At the same time, the arc-shaped chute guides the sliding of the ball, ensuring the accuracy and stability of the rotation of the camera module body around the rotation axis.

[0011] Optionally, the position sensing component includes: A magnet is installed on the base; A Hall sensor is installed on the piezoelectric module and is used to detect the change in the magnetic field strength generated by the magnet and determine the current position information of the camera module body according to the change in the magnetic field strength. By installing a magnet on the base and a Hall sensor on the piezoelectric module, the magnetic field interaction between the magnet and the Hall sensor is used to detect the position of the camera module body. When the camera module body rotates, the relative position between the magnet and the Hall sensor changes, resulting in a change in the magnetic field strength detected by the Hall sensor. The Hall sensor can accurately determine the current position information of the camera module body according to this change in the magnetic field strength, providing accurate feedback data for subsequent control and adjustment, and helping to achieve precise control of the camera module body.

[0012] Optionally, the signal and power supply component is respectively connected to the piezoelectric drive chip of the piezoelectric drive component and the Hall sensor of the position sensing component, and is used to receive the current position signal detected by the Hall sensor, transmit the current position signal to the external control circuit, and at the same time provide a working power supply for the piezoelectric drive chip and the Hall sensor. The signal and power supply component plays the role of a bridge and an energy supply. It not only provides a stable working power supply for the piezoelectric drive chip and the Hall sensor to ensure the normal operation of these two key components, but also is responsible for receiving the current position signal of the camera module body detected by the Hall sensor and accurately transmitting the current position signal to the external control circuit. This enables the external control circuit to timely obtain the current position information of the camera module body, and then precisely control and adjust the entire camera module, ensuring the stable operation of the system and the realization of its functions.

[0013] Optionally, the camera module body has the ability to flip in two directions, where the two directions include a first direction and a second direction, and the first direction and the second direction are opposite directions. The flipping angle range in the first direction is from 0° to 15°, and the flipping angle range in the second direction is from 0° to 25°. Moreover, the flipping angle range is defined based on the initial horizontal state of the camera module body; the initial horizontal state is the natural state where the camera module body is parallel to the base plane and is not powered on and not under external force. The flipping angle ranges of the camera module body in two opposite directions are clearly specified, providing specific technical parameters for the flipping function of the camera module body. This two-way flipping ability combined with the clear angle range enables the camera module body to adapt to more different shooting scenarios and requirements, greatly improving its flexibility and practicality. Defining the angle based on the initial horizontal state ensures the accuracy and consistency of angle measurement, facilitating unified standard judgment and operation in different devices and application scenarios.

[0014] Optionally, the camera module body includes: A flexible printed circuit board, serving as a carrier substrate for integrating and connecting various functional components of the camera module; An image sensor chip, disposed on the flexible printed circuit board, for converting the received optical signal into an electrical signal; A filter, disposed in front of the optical path of the image sensor chip, for filtering out light of specific wavelength bands and only allowing visible light to pass through; A lens holder, for fixing the filter and providing mounting support for the lens; A lens, mounted on the lens holder, for focusing external light onto the image sensor chip. The flexible printed circuit board serves as a carrier substrate, providing a stable mounting platform for various functional components inside the camera module body, realizing the electrical connection and functional integration between components, making the entire camera module body structure compact and functionally coordinated. The image sensor chip can convert the received optical signal into an electrical signal and is one of the core components for the camera module to achieve the imaging function. The filter effectively filters out light of specific wavelength bands and only allows visible light to pass through, reducing the influence of stray light on the imaging quality and improving the imaging clarity and color reproduction. The lens holder not only fixes the filter but also provides stable mounting support for the lens, ensuring accurate focusing between the lens and the image sensor chip and stable optical path transmission. The lens is responsible for focusing external light onto the image sensor chip and is the key optical component for achieving clear imaging. These components cooperate with each other to jointly ensure that the camera module body can complete the shooting task with high quality.

[0015] In a second aspect, an electronic device according to the present invention includes an electronic device body, a control circuit, and the intelligent flipping camera module according to the present invention; The control circuit includes a control module and a touch module; The touch module is used to receive the touch operation signal of the user, and convert the touch operation signal into a data format recognizable by the control module and transmit it to the control module; The signal of the intelligent flip camera module and the power supply component, and the flexible printed circuit boards of the camera module body are respectively connected to the control module; The control module is used to obtain the current position information of the camera module body detected by the position sensing component and the touch operation signal received by the touch module, process the touch operation signal and the current position information, calculate the target angle that the camera module body needs to rotate, and determine the voltage signal parameter output to the piezoelectric drive component according to the difference value between the target angle and the current angle, so as to realize the precise adjustment of the rotation angle of the camera module body.

[0016] Optionally, the electronic device is a tablet computer or a smart phone.

[0017] Advantages of the present invention: (1) Effectively solve the problem of high distortion and improve the correction accuracy: Through innovative design, the present invention enables the camera module body to rotate flexibly around the rotating shaft, abandoning the traditional idea of simply relying on a super-large viewing angle camera module to expand the shooting range. Although the existing super-large viewing angle camera module can cover a certain range, the high distortion rate of about 10% seriously interferes with the automatic correction accuracy, resulting in the deformation of the content at the four corners of the test paper and increasing the software recognition difficulty. For the intelligent flip camera module of the present invention, when the piezoelectric drive component is energized, a driving force is generated to make the camera module body rotate, and when it is powered off, a friction force is provided to keep the position stable. The rotation cooperation component ensures the smooth and accurate rotation process, and the position sensing component real-time feedbacks the position information of the camera module body. By precisely controlling the rotation angle of the camera module body, the shooting range can be flexibly adjusted without relying on the high-distortion shooting method brought by a super-large viewing angle. When correcting homework and test papers, it can present the content of the test paper with a more real picture, greatly reducing the software calculation difficulty, effectively improving the recognition accuracy of the software for the content of the test paper, and thus significantly improving the automatic correction accuracy, fundamentally overcoming the disadvantages brought by the high distortion of the existing super-large viewing angle camera module.

[0018] (2) Achieve large field of view coverage with low cost, small space occupation and low energy consumption, and optimize the user experience: Compared with the solution of using two camera modules to increase the field of view shooting range by complementary and superimposed field of view angles, the present invention has significant advantages. Although the existing solution can improve the shooting effect, the problems of doubled cost, large occupied space, and high energy consumption are prominent. The intelligent flip camera module of the present invention only requires one camera module, which can be flexibly rotated through intelligent control, effectively expanding the shooting range. In an electronic device, the camera module body is intelligently controlled through a control circuit. The touch module receives the user's touch operation signal and converts it into a data format recognizable by the control module, facilitating user interaction. The control module, as the core control unit, comprehensively processes the current position information of the camera module body feedback by the position sensing component and the touch operation signal received by the touch module, accurately calculates the target angle that the camera module body needs to rotate, and dynamically adjusts the voltage signal parameters output to the piezoelectric drive component according to the difference value between the target angle and the current angle, realizing precise adjustment of the rotation angle of the camera module body. This enables the camera module to cover the current lens shooting range up to FOV + 40°. While achieving large field of view coverage, it avoids the problems of increased cost, large space occupation, and high energy consumption caused by using two camera modules. It not only reduces the product cost, eases the pressure on production and sales costs, but also meets the requirements of the thin and light design of the intelligent learning tablet. At the same time, it reduces the battery energy consumption, extends the battery life of the tablet, and significantly optimizes the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the front view of the intelligent flip camera module described in the embodiment of the present application; Figure 2 is the analysis diagram of the intelligent flip camera module described in the embodiment of the present application; Figure 3 is Figure 1 the sectional view along line A-A in Figure 4 is Figure 1 the sectional view along line B-B in Figure 5 is the principle block diagram of the electronic control part of the electronic device described in the embodiment of the present application; Figure 6 is the schematic diagram of the field of view angle of an electronic device equipped with an ordinary camera module; Figure 7 is the schematic diagram of the field of view angle of an electronic device equipped with an intelligent flip camera module; In the figure: 1. Lens, 2. Base, 3. Lens holder, 4. Rotating shaft, 5. Filter, 6. Image sensor chip, 7. Piezoelectric friction plate, 8. Piezoelectric module, 9. Rigid-flex printed circuit board, 10. Ball fixing block, 11. Ball, 12. Arc-shaped chute, 13. Installation groove, 14. Control module, 15. Touch module, 16. Piezoelectric drive chip, 17. Hall sensor, 18. Electronic device body, 19. Shoottable potential field range, 20. Test paper, 21. Ordinary camera module, 22. Intelligent flip camera module. Detailed implementation manner

[0020] The following will describe the implementation manners of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for explaining the present invention and not for limiting the protection scope of the present invention.

[0021] As Figures 1 to 5 shown, in the embodiment of the present application, an intelligent flip camera module includes a base 2, a camera module body, a piezoelectric drive assembly, a rotation matching assembly, a position sensing assembly, and a signal and power supply assembly. The camera module body is connected to the base 2 through a rotating shaft 4 and can rotate relative to the base 2 around the rotating shaft 4. The piezoelectric drive assembly is connected to the camera module body and is used to generate a driving force to rotate the camera module body when powered on and provide a frictional force to maintain the stable position of the camera module body when powered off. The rotation matching assembly is arranged between the camera module body and the base 2 and is used to guide the camera module body to rotate around the rotating shaft 4 when the piezoelectric drive assembly is powered on. The position sensing assembly is used to detect the current position information of the camera module body. The signal and power supply assembly is respectively connected to the piezoelectric drive assembly and the position sensing assembly and is used to receive the signal detected by the position sensing assembly and supply power to the piezoelectric drive assembly and the position sensing assembly. Through the collaborative work of the above components, the basic function that the camera module body can flexibly rotate around the rotating shaft 4 is realized. The piezoelectric drive assembly plays the roles of driving and maintaining position stability when powered on and off respectively. The rotation matching assembly ensures the smoothness and accuracy of the rotation process. The position sensing assembly real-time feedbacks the position information of the camera module body. The signal and power supply assembly provides energy and data transmission support for the entire system, laying a foundation for the camera module to achieve intelligent flipping and precise control.

[0022] As Figure 2As shown, in a possible embodiment, the piezoelectric drive assembly includes a piezoelectric drive chip 16, a piezoelectric module 8, and a piezoelectric friction plate 7. The piezoelectric drive chip 16 is configured to receive an external control signal and output a corresponding drive voltage. The piezoelectric module 8 is connected to the piezoelectric drive chip 16 and deforms under the action of the drive voltage. The piezoelectric friction plate 7 is disposed on the piezoelectric module 8. When the piezoelectric module 8 is powered off, the rotation of the camera module body is prevented by the frictional force between the piezoelectric friction plate 7 and the contact surface of the base 2. The piezoelectric drive chip 16, as the control core, can accurately output a drive voltage according to the external control signal to achieve precise control of the deformation of the piezoelectric module 8. The piezoelectric module 8 deforms under the drive voltage, converting electrical energy into mechanical energy, thereby generating a driving force to drive the rotation of the camera module body. The piezoelectric friction plate 7 provides frictional force when powered off, effectively preventing the camera module body from unwanted rotation due to external forces and other factors, ensuring the stability of the camera module body in a stationary state.

[0023] As Figure 2 shown, in a possible embodiment, the piezoelectric module 8 is fixedly mounted on the rigid-flex board 9 of the camera module body, and the deformation direction of the piezoelectric module 8 is associated with the rotation direction of the camera module body to drive the camera module body to rotate around the rotation axis 4. Fixing the piezoelectric module 8 on the rigid-flex board 9 ensures a stable connection between the piezoelectric module 8 and the camera module body, enabling the driving force generated by the piezoelectric module 8 to be directly and effectively transmitted to the camera module body. By reasonably designing the association relationship between the deformation direction of the piezoelectric module 8 and the rotation direction of the camera module body, the deformation of the piezoelectric module 8 can be efficiently converted into the rotation of the camera module body, improving the driving efficiency and enabling the camera module body to rotate in the expected direction and angle.

[0024] As Figure 2 and Figure 3As shown, in a possible embodiment, the rotation fitting assembly includes a ball fixing block 10, balls 11, and an arc-shaped chute 12. The ball fixing block 10 is fixed to the camera module body. An installation groove 13 is formed at the bottom of the ball fixing block 10. The balls 11 are arranged in the installation groove 13 of the ball fixing block 10, and at least part of the balls 11 protrude from the surface of the ball fixing block 10. The arc-shaped chute 12 is integrally provided on the base 2. The balls 11 can slide in the arc-shaped chute 12, and the arc-shaped chute 12 guides the camera module body to rotate around the rotating shaft 4. The ball fixing block 10 fixes the balls 11 on the back surface of the camera module body to ensure the relative position stability of the balls 11 and the camera module body. At least part of the balls 11 protrude from the surface of the ball fixing block 10, enabling them to contact the arc-shaped chute 12 on the base 2. During the rotation of the camera module body, the balls 11 slide in the arc-shaped chute 12. This rolling friction method greatly reduces the frictional resistance during rotation, making the rotation of the camera module body smoother and more flexible. At the same time, the arc-shaped chute 12 guides the sliding of the balls 11, ensuring the accuracy and stability of the rotation of the camera module body around the rotating shaft 4.

[0025] As Figure 5 shown, in a possible embodiment, the position sensing assembly includes a magnet and a Hall sensor 17. The magnet is installed on the inner side of the base 2 near the rotating shaft small hole; the Hall sensor 17 is installed on the piezoelectric module 8 and is used to detect the change in the magnetic field intensity generated by the magnet and determine the current position information of the camera module body according to the change in the magnetic field intensity. By installing a magnet on the base 2 and a Hall sensor 17 on the piezoelectric module 8, the magnetic field interaction between the magnet and the Hall sensor 17 is used to detect the position of the camera module body. When the camera module body rotates, the relative position between the magnet and the Hall sensor 17 changes, resulting in a change in the magnetic field intensity detected by the Hall sensor 17. The Hall sensor 17 can accurately determine the current position information of the camera module body according to this change in the magnetic field intensity, providing accurate feedback data for subsequent control and adjustment, and helping to achieve precise control of the camera module body.

[0026] As Figure 5As shown, in a possible embodiment, the signal and power supply component are respectively connected to the piezoelectric drive chip 16 of the piezoelectric drive component and the Hall sensor 17 of the position sensing component, for receiving the current position signal detected by the Hall sensor 17, and transmitting the current position signal to an external control circuit, while providing a working power supply for the piezoelectric drive chip 16 and the Hall sensor 17. The signal and power supply component is an FPC flexible board, and the piezoelectric drive chip 16 is arranged on the FPC flexible board. The FPC flexible board is also provided with related circuits that can realize functions such as receiving the current position signal detected by the Hall sensor 17, transmitting the current position signal to an external control circuit, and simultaneously providing a working power supply for the piezoelectric drive chip 16 and the Hall sensor 17. The signal and power supply component plays the role of a bridge and an energy supply. It not only provides a stable working power supply for the piezoelectric drive chip 16 and the Hall sensor 17 to ensure the normal operation of these two key components, but also is responsible for receiving the current position signal of the camera module body detected by the Hall sensor 17 and accurately transmitting the current position signal to the external control circuit. This enables the external control circuit to timely obtain the current position information of the camera module body, and then precisely control and adjust the entire camera module, ensuring the stable operation of the system and the realization of its functions.

[0027] As Figure 3 shown, in a possible embodiment, the camera module body has the ability to flip bidirectionally. The two directions include the first direction and the second direction, and the first direction and the second direction are opposite directions. The flipping angle range of the camera module body in the first direction is from 0° to 15°, and the flipping angle range in the second direction is from 0° to 25°. The flipping angle range is defined based on the initial horizontal state of the camera module body. Clearly defining the flipping angle range of the camera module body in two opposite directions provides specific technical parameters for the flipping function of the camera module body. This bidirectional flipping ability combined with the clear angle range enables the camera module body to adapt to more different shooting scenarios and requirements, greatly improving its flexibility and practicality. Defining the angle based on the initial horizontal state ensures the accuracy and consistency of angle measurement, facilitating unified standard judgment and operation in different devices and application scenarios.

[0028] As Figures 2 to 4As shown, in a possible embodiment, the camera module body includes a flexible printed circuit (FPC) board 9, an image sensor chip 6, a filter 5, a lens holder 3, and a lens 1. The FPC board 9 serves as a carrier substrate for integrating and connecting the functional components of the camera module. The image sensor chip 6 is disposed on the FPC board 9 and is used to convert the received optical signal into an electrical signal. The filter 5 is disposed in front of the optical path of the image sensor chip 6 and is used to filter out light of specific wavelength bands and only allow visible light to pass through. The lens holder 3 is used to fix the filter 5 and provide mounting support for the lens 1. The lens 1 is mounted on the lens holder 3 and is used to focus the external light onto the image sensor chip 6. The FPC board 9, as the carrier substrate, provides a stable mounting platform for the internal functional components of the camera module body, realizes the electrical connection and functional integration between the components, and makes the entire camera module body compact in structure and coordinated in function. The image sensor chip 6 can convert the received optical signal into an electrical signal and is one of the core components for the camera module to achieve the imaging function. The filter 5 effectively filters out light of specific wavelength bands and only allows visible light to pass through, reducing the influence of stray light on the imaging quality and improving the imaging clarity and color reproduction. The lens holder 3 not only fixes the filter 5 but also provides stable mounting support for the lens 1, ensuring accurate focusing between the lens 1 and the image sensor chip 6 and stable optical path transmission. The lens 1 is responsible for focusing the external light onto the image sensor chip 6 and is the key optical component for achieving clear imaging. These components cooperate with each other to jointly ensure that the camera module body can complete the shooting task with high quality.

[0029] As Figure 5 and Figure 7 shown, in the embodiment of the present application, an electronic device includes an electronic device body 18, a control circuit, and the intelligent flip camera module 22 in the embodiment of the present application. The control circuit includes a control module 14 and a touch module 15. The touch module 15 is used to receive the touch operation signal of the user and convert the touch operation signal into a data format recognizable by the control module 14 and transmit it to the control module 14. The signal of the intelligent flip camera module 22 and the FPC board 9 of the camera module body are respectively connected to the control module 14. The control module 14 is used to obtain the current position information of the camera module body detected by the position sensing component and the touch operation signal received by the touch module 15, process the touch operation signal and the current position information, calculate the target angle that the camera module body needs to rotate, and determine the voltage signal parameters output to the piezoelectric drive component according to the difference value between the target angle and the current angle, so as to realize the precise adjustment of the rotation angle of the camera module body.

[0030] Integrating the intelligent flip camera module 22 into electronic devices brings a revolutionary and convenient experience to application scenarios such as grading test papers 20. In the scenario where electronic devices assist in grading test papers 20, the test paper 20 will inevitably tilt or shift during placement. Once it exceeds the fixed shooting range of the conventional camera module, it will affect the acquisition of complete test paper 20 information, thereby slowing down the grading efficiency and even causing deviations in the grading results.

[0031] The electronic device equipped with the intelligent flip camera module 22 is completely different. When the test paper 20 is tilted or moved and exceeds the initial shooting range, the user only needs to touch the touch module 15 on the electronic device to issue a command to the control circuit. The control circuit responds quickly, comprehensively processes the current position information of the camera module and the touch operation signal fed back by the position sensing component, accurately calculates the target angle that the camera module needs to rotate, and dynamically adjusts the voltage signal parameters output to the piezoelectric drive component accordingly, drives the piezoelectric module 8 to deform, and then drives the camera module body to rotate flexibly, quickly adjusts the shooting range, until the complete picture of the test paper 20 is in full view, and realizes efficient and accurate correction of the test paper 20.

[0032] From the technical parameters, the smart flip camera module 22 shows excellent flip performance under the synergy of piezoelectric drive and ball 11 guidance. If the first direction is upward and the second direction is downward, the module can achieve flexible flipping of 15° upward and 25° downward. At the same time, the module is equipped with a camera module with a field of view (FOV) of 78°, and the distortion rate is controlled at an excellent level of <1%. Thanks to its unique flip design, the actual shooting range that can be covered is FOV=118°. Compared with the conventional wide-angle camera module with a field of view of 120° but a distortion rate of up to 10%, the smart flip camera module 22 can significantly reduce the amount of image deformation when acquiring the image of the test paper 20, ensuring that the formulas, symbols and other key information in the test paper 20 are presented in a more real and accurate state, which greatly improves the accuracy of processing complex content during the correction process of the test paper 20, demonstrating a high degree of intelligence and practicality.

[0033] In a possible embodiment, the electronic device is a tablet computer or a smart phone.

[0034] like Figure 6 In the scenario shown, when a tablet computer is equipped with an ordinary camera module 21, since the shooting field of view is fixed, once the test paper 20 is slightly tilted or displaced, it will quickly exceed the shooting boundary of the camera module, resulting in the inability to fully capture the test paper 20 questions, let alone achieve accurate test paper 20 grading.

[0035] However, if Figure 7As shown, when the intelligent flip camera module 22 is installed on the tablet computer, the situation is greatly improved. With its flexible flipping ability of 15° upward and 25° downward, the intelligent flip camera module 22 effectively expands the shootable potential field range 19, that is, the actual shootable range = FOV + 40°. Once the test paper 20 is tilted or displaced, the user can easily adjust the rotation angle of the intelligent flip camera module 22 through touch operation, flexibly adjust the shooting range, ensure that the entire picture of the test paper 20 is always within the shooting field of view, and thus provide a strong guarantee for accurately grading the test paper 20.

[0036] This is a preferred embodiment of the present invention. However, the embodiments of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A smart flip camera module, characterized in that, It includes a base (2), a camera module body, a piezoelectric drive assembly, a rotational mating assembly, a position sensing assembly, and a signal and power supply assembly; The camera module body is connected to the base (2) through a rotating shaft (4) and can rotate relative to the base (2) about the rotating shaft (4); The piezoelectric drive assembly is connected to the camera module body and is used to generate a driving force to rotate the camera module body when powered on and provide a frictional force to keep the position of the camera module body stable when powered off; The rotational mating assembly is arranged between the camera module body and the base (2) and is used to guide the camera module body to rotate about the rotating shaft (4) when the piezoelectric drive assembly is powered on; The position sensing assembly is used to detect the current position information of the camera module body; The signal and power supply assembly is respectively connected to the piezoelectric drive assembly and the position sensing assembly, and is used to receive the signal detected by the position sensing assembly and supply power to the piezoelectric drive assembly and the position sensing assembly.

2. The intelligent flip camera module according to claim 1, wherein The piezoelectric drive assembly includes: A piezoelectric drive chip (16) for receiving an external control signal and outputting a corresponding drive voltage; A piezoelectric module (8) connected to the piezoelectric drive chip (16) and deforming under the action of the drive voltage; A piezoelectric friction plate (7) arranged on the piezoelectric module (8). When the piezoelectric module (8) is powered off, it prevents the camera module body from rotating through the frictional force between the contact surfaces with the base (2).

3. The intelligent flip camera module according to claim 2, wherein The piezoelectric module (8) is fixedly installed on the rigid-flex board (9) of the camera module body, and the deformation direction of the piezoelectric module (8) is associated with the rotation direction of the camera module body to realize driving the camera module body to rotate about the rotating shaft (4).

4. The intelligent flip camera module according to claim 1, wherein, The rotational mating assembly includes: A ball fixing block (10) fixed to the camera module body; Balls (11) arranged on the ball fixing block (10) and at least partially protruding from the surface of the ball fixing block (10); An arc-shaped chute (12) arranged on the base (2). The balls (11) can slide in the arc-shaped chute (12) to guide the camera module body to rotate about the rotating shaft (4).

5. The intelligent flip camera module according to claim 2, wherein The position sensing assembly includes: A magnet installed on the base (2); A Hall sensor (17) installed on the piezoelectric module (8) and used to detect the change in the magnetic field intensity generated by the magnet and determine the current position information of the camera module body according to the change in the magnetic field intensity.

6. The intelligent flip camera module according to claim 5, characterized in that, The signal and power supply assembly is respectively connected to the piezoelectric drive chip (16) of the piezoelectric drive assembly and the Hall sensor (17) of the position sensing assembly, and is used to receive the current position signal detected by the Hall sensor (17), transmit the current position signal to an external control circuit, and at the same time provide a working power supply for the piezoelectric drive chip (16) and the Hall sensor (17).

7. The intelligent flip camera module according to claim 1, wherein The camera module body has the ability to flip in two directions. The two directions include a first direction and a second direction, and the first direction and the second direction are opposite directions. The flipping angle range of the camera module body in the first direction is from 0° to 15°, and the flipping angle range in the second direction is from 0° to 25°. The flipping angle range is defined based on the initial horizontal state of the camera module body.

8. The intelligent flip camera module according to claim 1, wherein The camera module body includes: A flexible printed circuit board (9), serving as a carrier substrate for integrating and connecting various functional components of the camera module; An image sensor chip (6), disposed on the flexible printed circuit board (9), for converting the received optical signal into an electrical signal; A filter (5), disposed in front of the optical path of the image sensor chip (6), for filtering out light of a specific wavelength band and allowing only visible light to pass through; A lens holder (3), for fixing the filter (5) and providing mounting support for the lens (1); A lens (1), mounted on the lens holder (3), for focusing external light onto the image sensor chip (6).

9. An electronic device, characterized in that, It includes an electronic device body (18), a control circuit, and the intelligent flipping camera module (22) according to any one of claims 1 - 8; The control circuit includes a control module (14) and a touch module (15); The touch module (15) is configured to receive a touch operation signal from a user and convert the touch operation signal into a data format recognizable by the control module (14) and transmit it to the control module (14); The signals of the intelligent flipping camera module (22), the power supply component, and the flexible printed circuit board (9) of the camera module body are respectively connected to the control module (14); The control module (14) is configured to obtain the current position information of the camera module body detected by the position sensing component and the touch operation signal received by the touch module (15), process the touch operation signal and the current position information, calculate the target angle that the camera module body needs to rotate, and determine the voltage signal parameters output to the piezoelectric drive component according to the difference value between the target angle and the current angle, so as to achieve precise adjustment of the rotation angle of the camera module body.

10. The electronic device according to claim 9, wherein The electronic device is a tablet computer or a smart phone.

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