CN115242940B - Camera module and electronic equipment - Google Patents

Abstract

The application relates to a camera module and electronic equipment, wherein the camera module comprises a mounting seat, a lens cone and a piezoelectric element, the lens cone is connected to the mounting seat, the piezoelectric element is connected to the mounting seat, and the piezoelectric element is used for generating movement in a first direction and a second direction under the action of a single electric signal so as to drive the lens cone to move relative to the mounting seat and realize optical anti-shake of the camera module. According to the camera module, the piezoelectric piece can drive the lens barrel to realize nano-scale displacement under the action of a single electric signal, and sub-micron-scale displacement control of the lens barrel can be easily realized by controlling the cycle number of the single electric signal, so that the high-precision anti-shake requirement of the camera module is met; the accumulation of the lens barrel displacement can be realized by increasing the cycle number of a single electric signal, and the requirement of the camera module for large-stroke anti-shake is met.

Description

Camera module and electronic equipment

Technical Field

The present application relates to the field of camera modules, and in particular, to a camera module and an electronic device.

Background

Camera modules of electronic devices such as mobile phones and tablet computers are generally equipped with a voice coil motor, which is used for driving a lens group in the camera module to move so as to realize a focusing or anti-shake function of the camera module. The traditional voice coil motor is generally electromagnetic, the accuracy and the stroke of the anti-shake performance of the traditional voice coil motor are greatly limited by analog-to-digital conversion/digital-to-analog conversion (ADC/DAC), and the anti-shake requirements of high accuracy and large stroke are difficult to realize at the same time.

Disclosure of Invention

The embodiment of the application provides a camera module and electronic equipment, which are used for meeting the requirements of high precision and large stroke of the camera module for anti-shake.

The utility model provides a camera module, includes mount pad, lens cone and piezoelectricity spare, the lens cone piezoelectricity spare connect respectively in the mount pad, piezoelectricity spare is used for producing the motion of first direction and second direction under single electrical signal effect, in order to drive the lens cone is relative the mount pad motion and realization the optics anti-shake of camera module.

The lens barrel is connected to the mounting seat, the piezoelectric piece is connected to the mounting seat, and the piezoelectric piece is used for generating movement in a first direction and a second direction under the action of a single electric signal so as to drive the lens barrel to move relative to the mounting seat and realize optical anti-shake of the camera module, the piezoelectric piece can drive the lens barrel to realize nano-scale displacement under the action of the single electric signal, and sub-micron-level displacement control of the lens barrel can be easily realized by controlling the cycle number of the single electric signal, so that the high-precision anti-shake requirement of the camera module is met; the accumulation of the lens barrel displacement can be realized by increasing the cycle number of a single electric signal, and the requirement of the camera module for large-stroke anti-shake is met.

An electronic device comprises a shell and the camera module, wherein the camera module is arranged on the shell.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an electronic device according to an embodiment;

FIG. 2 is a schematic diagram of a camera module according to an embodiment;

FIG. 3 is a schematic diagram of a camera module according to another embodiment;

FIG. 4 is a schematic diagram showing the relative positions of the piezoelectric element, the rolling element, the position sensor, the lens barrel and the mounting base of the camera module according to an embodiment;

fig. 5 is a schematic block diagram of an electronic device according to an embodiment.

Reference numerals:

10. Electronic device 11, housing 12, and camera module

12A, an optical axis 121, a mounting seat 121a and a limit groove

1211. Base 1213, bracket 122, and lens barrel

123. Piezoelectric element 1231, piezoelectric body 1233, and friction head

124. Optical filter 125, image sensor 126, and circuit board

127. Rolling element 128, pretensioner 129, and position sensor

1291. Magnet 1293 and magnetic induction chip

Detailed Description

In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

As used herein, "electronic device" refers to a device capable of receiving and/or transmitting communication signals that includes, but is not limited to, a device connected via any one or several of the following connections:

(1) Via a wireline connection, such as via a public-switched telephone network (Public Switched Telephone Networks, PSTN), a digital subscriber line (Digital Subscriber Line, DSL), a digital cable, a direct cable connection;

(2) Via a wireless interface, such as a cellular network, a wireless local area network (Wireless Local Area Network, WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter.

An electronic device arranged to communicate over a wireless interface may be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:

(1) Satellite phones or cellular phones;

(2) A personal communications system (Personal Communications System, PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities;

(3) A radio telephone, pager, internet/intranet access, web browser, notepad, calendar, personal digital assistant (Personal DIGITAL ASSISTANT, PDA) equipped with a global positioning system (Global Positioning System, GPS) receiver;

(4) Conventional laptop and/or palmtop receivers;

(5) Conventional laptop and/or palmtop radiotelephone transceivers, and the like.

Referring to fig. 1 and 2, in some embodiments, the electronic device 10 is a smart phone. The electronic device 10 includes a housing 11 and a camera module 12, the camera module 12 being connected to the housing 11. The camera module 12 may be used to perform shooting functions, such as near, far, and video calls. In some implementations, the electronic device 10 includes a display screen (not shown) that may be used to display images and provide an interactive interface for a user. In some embodiments, the camera module 12 is used for implementing rear-end shooting, that is, the light-entering side of the camera module 12 is located at the back of the display surface of the display screen; in other embodiments, the camera module 12 may be used to implement front-facing photography, i.e., the light-entering side of the camera module 12 is located on the same side of the display surface of the display screen. In other embodiments, the electronic device 10 may be, but is not limited to, a tablet, notebook, palm top, etc.

Referring to fig. 2, in some embodiments, the camera module 12 includes a mounting base 121, a lens barrel 122 and a piezoelectric element 123, the mounting base 121 is used for carrying the lens barrel 122 and the piezoelectric element 123, the lens barrel 122 and the piezoelectric element 123 are respectively connected to the mounting base 121, and a lens or a lens group for converging light is installed in the lens barrel 122. The piezoelectric element 123 is configured to generate a motion in a first direction and a second direction under the action of a single electric signal, so as to drive the lens barrel 122 to move relative to the mounting seat 121 and realize optical anti-shake of the camera module 12.

Specifically, in some embodiments, the mount 121 may include a base 1211 and a bracket 1213 connected to the base 1211, and the lens barrel 122 and the piezoelectric element 123 are respectively connected to the bracket 1213. The camera module 12 may also include a filter 124, an image sensor 125, and a circuit board 126. The optical filter 124 is connected to the base 1211 and is used for filtering infrared light to improve the shooting quality of the camera module 12, and the optical filter 124 is located between the lens barrel 122 and the image sensor 125. The image sensor 125 is connected to the circuit board 126, the circuit board 126 is connected to the base 1211, and the circuit board 126 can be electrically connected to an external circuit, such as a motherboard of a mobile phone, so as to realize communication connection between the camera module 12 and the motherboard.

With continued reference to fig. 2, the piezoelectric member 123 may include a piezoelectric body 1231 and a friction head 1233 connected to the piezoelectric body 1231, the piezoelectric body 1231 being connected to the bracket 1213 of the mount 121, the friction head 1233 being abutted against the lens barrel 122. The piezoelectric body 1231 is configured to generate a motion in a first direction and a second direction under the action of a single electric signal to drive the friction head 1233 to move, and further drive the lens barrel 122 to move relative to the mounting seat 121 through the friction head 1233, so as to realize optical anti-shake of the camera module 12. The friction head 1233 may be made of a material having a relatively large friction coefficient, such as silicone, rubber, etc., to increase the friction between the friction head 1233 and the barrel 122, and prevent slippage between the barrel 122 and the piezoelectric member 123.

In the related art, the camera module 12 generally adopts an electromagnetic voice coil motor to realize focusing and anti-shake functions, and the current and the stroke of the voice coil motor have a corresponding relationship. In general, the larger the stroke of the barrel 122 or lens, the larger the required drive current; the higher the current accuracy, the higher the minimum driving accuracy. For example, when the stroke of the voice coil motor is 1mm and the maximum current is 1000mA and the minimum driving precision is 1um, a 10-bit driving IC (INTEGRATED CIRCUIT ) is generally required for control; when the stroke of the voice coil motor is correspondingly extended to 2mm and 3mm and the minimum driving precision is unchanged, the maximum current is correspondingly extended to 2000mA and 3000mA, and 11-bit and 12-bit driving ICs are generally required for control. With the lifting of the pixels of the camera module 12 on the electronic device 10, the volumes of the image sensor 125 and the corresponding optical elements of the camera module 12 are increased, and the strokes and driving forces required for focusing and anti-shake are also increased, so that the maximum driving current is increased when the voice coil motor is adopted, resulting in an increase in the power consumption of the camera module 12, and the ADC/DAC precision is also increased, resulting in a large increase in the cost and size of the driving IC.

In the embodiment of the present application, the piezoelectric body 1231 is a resonant piezoelectric body, which can drive the friction head 1233 to perform elliptical motion under the driving of a certain sine wave voltage, so as to drive the lens barrel 122 to move relative to the mounting seat 121. Since the displacement of the piezoelectric body 1231 per elliptical motion is extremely small, generally, a nano-scale motion, the sub-micro displacement of the lens barrel 122 can be easily realized by adjusting the cycle number of the sine wave voltage control signal. In addition, since the motion stroke of the piezoelectric body 1231 and the cycle number of the sine wave voltage control signal are positively correlated, when the long-stroke motion of the lens barrel 122 needs to be realized, the large-stroke motion of the lens barrel 122 can be realized without increasing the maximum control current, and the power consumption of the camera module 12 and the electronic device 10 can be effectively reduced.

Referring to fig. 2 and 3, in some embodiments, the lens barrel 122 has an optical axis 12a, and the first direction and the second direction are orthogonal to the optical axis 12 a. By using the optical axis 12a as the Z axis, the first direction as the X axis, and the second direction as the Y axis, the piezoelectric body 1231 according to the embodiment of the present application can generate the movement in the X axis direction and the Y axis direction under the action of a single electric signal to drive the friction head 1233 to move.

In the related art, the piezoelectric module generally can only drive the lens barrel 122 to move in one direction (for example, X direction), but the optical anti-shake scheme generally needs to control the displacement of the lens barrel 122 in two orthogonal directions XY, so more than 2 piezoelectric modules are generally required to be provided. The piezoelectric element 123 of the embodiment of the application can move in 2 directions (X axis and Y axis) simultaneously under the action of a single electric signal, so that the driving structure of optical anti-shake can be effectively simplified.

In addition, in the related art, one electrical signal is generally used to drive the piezoelectric module to deform in the X direction, and the other electrical signal is used to drive the piezoelectric module to deform in the Y direction, so that the piezoelectric module can synthesize elliptical motion through synchronous control of the two electrical signals, and further drive the lens barrel 122 to displace. This arrangement places high demands on the synchronicity of the two electrical signals. In the embodiment of the present application, the deformation of the piezoelectric element 123 in the first direction and the second direction can be achieved by using a single electric signal. For example, referring to fig. 4, in some embodiments, the piezoelectric body 1231 is substantially rectangular and the friction head 1233 is overlapped with the piezoelectric body 1231 in the Z-axis direction, and when a single electric signal is applied to two sides of the piezoelectric body 1231, for example, one side parallel to XOZ and one side parallel to YOZ, the piezoelectric body 1231 can be driven to deform in the X-direction and the Y-direction and synthesize an elliptical motion, so that the lens barrel 122 is driven to displace by the friction head 1233 to realize optical anti-shake of the camera module 12. Of course, in some embodiments, two terminals of a single electrical signal may be applied to the side parallel to XOZ and the side parallel to XOY, respectively, to drive the camera module 12 to displace in the Z direction and the Y direction, which will not be described herein.

Referring to fig. 2 and 3, in some embodiments, the camera module 12 includes a rolling element 127, a bracket 1213 of the mounting base 121 is provided with a limiting groove 121a, and the rolling element 127 abuts against the lens barrel 122 and is rollably disposed in the limiting groove 121a. The rolling element 127 can be a ball or a roller, and when the lens barrel 122 is driven to generate displacement, the rolling element 127 can generate relative rolling with the lens barrel 122, so as to reduce the displacement resistance of the lens barrel 122 and improve the response speed of the optical anti-shake control.

Referring to fig. 4, the piezoelectric member 123 and the rolling element 127 are disposed in the first direction and the second direction, and the piezoelectric member 1231 and the rolling element 127 arranged in the first direction are respectively located at two opposite sides of the lens barrel 122, and the piezoelectric member 1231 and the rolling element 127 arranged in the second direction are respectively located at two opposite sides of the lens barrel 122. The piezoelectric element 123 in the first direction and the piezoelectric element 123 in the second direction may work cooperatively, for example, the piezoelectric element 123 in the first direction and the piezoelectric element 123 in the second direction may work simultaneously, so as to adjust the positions of the lens barrel 122 in the first direction and the second direction, so as to improve the control accuracy and the response speed.

Referring to fig. 2 and 3, in some embodiments, the camera module 12 may further include a pre-tightening member 128, where the pre-tightening member 128 is connected to the mounting base 121 and the lens barrel 122, so that the lens barrel 122 presses the friction head 1233 and the rolling bodies 127. In some embodiments, the pretensioning member 128 is a spring. After the elastic sheet is assembled with the bracket 1213 of the mounting seat 121 and the lens barrel 122, a pretightening force can be applied to the lens barrel 122 in the direction of the optical axis 12a (Z axis), so that the lens barrel 122 is pressed against the friction head 1233 and the rolling body 127, thereby ensuring the position accuracy of the lens barrel 122, for example, keeping the optical axis 12a in a vertical relation with the image sensor 125, and ensuring the normal operation of the piezoelectric element 123.

With continued reference to fig. 3, the camera module 12 may further include a position sensor 129, the position sensor 129 including a magnet 1291 and a magnetic induction chip 1293, one of the magnet 1291 and the magnetic induction chip 1293 being connected to the bracket 1213 of the mount 121 and the other being connected to the lens barrel 122 for detecting displacement of the lens barrel 122 relative to the mount 121. In the embodiment of the present application, the position sensor 129 including the magnet 1291 and the magnetic induction chip 1293 is one of hall sensors, which can determine the displacement between two objects by using the change of the magnetic field, and can obtain higher control accuracy. The optical anti-shake of the camera module 12 can form closed loop control by combining the setting of the position sensor 129, i.e. after the position sensor 129 is combined to feed back the displacement of the lens barrel 122 relative to the bracket 1213, the control precision of the optical anti-shake can be further improved.

Referring to fig. 4, in some embodiments, the camera module 12 may include more than 2 position sensors 129, with more than two position sensors 129 disposed around the barrel 122. For example, in the embodiment shown in fig. 4, one position sensor 129 is disposed between the piezoelectric element 123 and the lens barrel 122 in the first direction, and the other position sensor 129 is disposed between the piezoelectric element 123 and the lens barrel 122 in the second direction, which can improve the position control accuracy of the lens barrel 122 in the first direction and the second direction. Further, a position sensor 129 may be further provided between the rolling elements 127 in the first direction and the rolling elements 127 in the second direction in the circumferential direction of the lens barrel 122, so as to further improve the position control accuracy of the lens barrel 122.

Fig. 5 shows a module structure of the electronic device 10. The electronic device 10 may include Radio Frequency (RF) circuitry 501, memory 502 including one or more computer readable storage media, an input unit 503, a display unit 504, a sensor 505, audio circuitry 506, a wireless fidelity (WiFi, wireless Fidelity) module 507, a processor 508 including one or more processing cores, and a power supply 509. Those skilled in the art will appreciate that the configuration of the electronic device 10 shown in fig. 5 is not limiting of the electronic device 10 and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.

The radio frequency circuit 501 may be used to send and receive information, or receive and send signals during a call, specifically, after receiving downlink information of a base station, the downlink information is processed by one or more processors 508; in addition, data relating to uplink is transmitted to the base station. Typically, the radio frequency circuitry 501 includes, but is not limited to, an antenna, at least one amplifier, a tuner, one or more oscillators, a subscriber identity module (SIM, subscriber Identity Module) card, a transceiver, a coupler, a low noise amplifier (LNA, low Noise Amplifier), a duplexer, and the like. In addition, the radio frequency circuit 501 may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol including, but not limited to, global system for mobile communications (GSM, global System of Mobile communication), universal packet Radio Service (GPRS, general Packet Radio Service), code division multiple access (CDMA, code Division Multiple Access), wideband code division multiple access (WCDMA, wideband Code Division Multiple Access), long term evolution (LTE, long Term Evolution), email, short message Service (SMS, short MESSAGING SERVICE), and the like.

Memory 502 may be used to store applications and data. The memory 502 stores application programs including executable code. Applications may constitute various functional modules. The processor 508 executes various functional applications and data processing by running application programs stored in the memory 502. The memory 502 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like; the storage data area may store data created according to the use of the electronic device 10 (such as audio data, phonebooks, etc.), and the like. In addition, memory 502 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 502 may also include a memory controller to provide access to the memory 502 by the processor 508 and the input unit 503.

The input unit 503 may be used to receive input numbers, character information or user characteristic information such as fingerprints, and to generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control. In particular, in one particular embodiment, the input unit 503 may include a touch-sensitive surface, as well as other input devices. The touch-sensitive surface, also referred to as a touch display screen or a touch pad, may collect touch operations thereon or thereabout by a user (e.g., operations thereon or thereabout by a user using any suitable object or accessory such as a finger, stylus, etc.), and actuate the corresponding connection means according to a predetermined program. Alternatively, the touch-sensitive surface may comprise two parts, a touch detection device and a touch controller. The touch detection device detects the touch azimuth of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device and converts it into touch point coordinates, which are then sent to the processor 508, and can receive commands from the processor 508 and execute them.

The display unit 504 may be used to display information entered by a user or provided to a user as well as various graphical user interfaces of the electronic device 10, which may be composed of graphics, text, icons, video, and any combination thereof. The display unit 504 may include a display panel. Alternatively, the display panel may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like. Further, the touch-sensitive surface may overlay a display panel, and upon detection of a touch operation thereon or thereabout, the touch-sensitive surface is passed to the processor 508 to determine the type of touch event, and the processor 508 then provides a corresponding visual output on the display panel based on the type of touch event. Although in fig. 5 the touch sensitive surface and the display panel are implemented as two separate components for input and output functions, in some embodiments the touch sensitive surface may be integrated with the display panel to implement the input and output functions. It is understood that the display 110 may include an input unit 503 and a display unit 504.

The electronic device 10 may also include at least one sensor 505, such as a light sensor, a motion sensor, and other sensors. In particular, the light sensor may include an ambient light sensor that may adjust the brightness of the display panel according to the brightness of ambient light, and a proximity sensor that may turn off the display panel and/or backlight when the electronic device 10 is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and the direction when the mobile phone is stationary, and can be used for applications of recognizing the gesture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking), and the like; other sensors such as gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc. that may also be configured with the electronic device 10 are not described in detail herein.

Audio circuitry 506 may provide an audio interface between the user and electronic device 10 through speakers, microphones, and so forth. The audio circuit 506 may convert the received audio data into an electrical signal, transmit to a speaker, and convert the electrical signal into a sound signal for output by the speaker; on the other hand, the microphone converts the collected sound signals into electrical signals, which are received by the audio circuit 506 and converted into audio data, which are processed by the audio data output processor 508 for transmission to, for example, another electronic device 10 via the radio frequency circuit 501, or which are output to the memory 502 for further processing. The audio circuit 506 may also include a headset base to provide communication of the peripheral headset with the electronic device 10.

Wireless fidelity (WiFi) belongs to a short-range wireless transmission technology, and the electronic device 10 can help a user to send and receive e-mail, browse web pages, access streaming media and the like through the wireless fidelity module 507, so that wireless broadband internet access is provided for the user. Although fig. 5 illustrates a wireless fidelity module 507, it is understood that it is not a necessary component of the electronic device 10 and may be omitted entirely as desired without changing the essence of the invention.

The processor 508 is a control center of the electronic device 10, connects various portions of the entire electronic device 10 using various interfaces and lines, and performs various functions of the electronic device 10 and processes data by running or executing applications stored in the memory 502, and invoking data stored in the memory 502, thereby performing overall monitoring of the electronic device 10. Optionally, the processor 508 may include one or more processing cores; preferably, the processor 508 may integrate an application processor that primarily handles operating systems, user interfaces, applications, etc., with a modem processor that primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 508.

The electronic device 10 also includes a power supply 509 that provides power to the various components. Preferably, the power supply 509 may be logically connected to the processor 508 through a power management system, so as to perform functions of managing charging, discharging, and power consumption management through the power management system. The power supply 509 may also include one or more of any of a direct current or alternating current power supply, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and the like.

Although not shown in fig. 5, the electronic device 10 may further include a bluetooth module or the like, which is not described herein. In the implementation, each module may be implemented as an independent entity, or may be combined arbitrarily, and implemented as the same entity or several entities, and the implementation of each module may be referred to the foregoing method embodiment, which is not described herein again.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (8)

1. A camera module, comprising:

a mounting base;

the lens cone is connected to the mounting seat; and

The piezoelectric piece is connected with the mounting seat, and the single piezoelectric piece is used for generating movement in a first direction and a second direction under the action of a single electric signal so as to drive the lens cone to move relative to the mounting seat and realize optical anti-shake of the camera module;

the camera module comprises a rolling body, the mounting seat is provided with a limit groove, and the rolling body is propped against the lens barrel and can be arranged in the limit groove in a rolling manner;

The piezoelectric piece and the rolling body are respectively positioned at two opposite sides of the lens cone;

The piezoelectric piece comprises a piezoelectric body and a friction head connected with the piezoelectric body, the piezoelectric body is connected with the mounting seat, and the friction head is abutted against the lens barrel; the piezoelectric body is used for generating movement in a first direction and a second direction under the action of a single electric signal so as to drive the friction head to move;

The lens barrel is provided with an optical axis, the first direction and the second direction are orthogonal to the optical axis in pairs, a rectangular coordinate system is established by taking the optical axis as a Z axis, taking the first direction as an X axis and taking the second direction as a Y axis, the piezoelectric body is rectangular block-shaped, and two terminals of a single electric signal are respectively applied to one side face of the piezoelectric body parallel to the XOZ and one side face parallel to the YOZ.

2. The camera module of claim 1, wherein the camera module comprises a pre-tightening member connected to the mount and the lens barrel such that the lens barrel presses the friction head and the rolling element.

3. The camera module of claim 2, wherein the piezoelectric body is a resonant piezoelectric body, the pretensioner is a spring plate, and the rolling body is a ball.

4. The camera module according to claim 1, wherein the piezoelectric element and the rolling element are disposed in the first direction and the second direction, the piezoelectric element and the rolling element disposed in the first direction are disposed on opposite sides of the lens barrel, and the piezoelectric element and the rolling element disposed in the second direction are disposed on opposite sides of the lens barrel.

5. The camera module of claim 1, wherein the camera module comprises a position sensor comprising a magnet and a magnetic induction chip, one of the magnet and the magnetic induction chip being connected to the mount and the other being connected to the lens barrel for detecting displacement of the lens barrel relative to the mount.

6. The camera module of claim 5, wherein the camera module comprises more than 2 of the position sensors, and more than two of the position sensors are disposed around the lens barrel.

7. The camera module according to any one of claims 1 to 6, wherein the mount includes a base and a bracket connected to the base, and the lens barrel and the piezoelectric element are respectively connected to the bracket; the camera module comprises an optical filter, an image sensor and a circuit board, wherein the optical filter is connected to the base, the image sensor is connected to the circuit board, the circuit board is connected to the base, and the optical filter is located between the lens cone and the image sensor.

8. An electronic device comprising a housing and the camera module of any one of claims 1-7, the camera module being disposed on the housing.