Optical image stabilization device, camera module and electronic device

Abstract

This disclosure provides an optical image stabilization device, a camera module, and an electronic device. The optical image stabilization device includes: a substrate; an image processing unit electrically connected to the substrate; a piezoelectric drive assembly located between the substrate and the image processing unit; the piezoelectric drive assembly includes a base and a piezoelectric element electrically connected to the base, the base being disposed on and electrically connected to the substrate; the piezoelectric element being disposed on the base and suspended relative to the substrate; and an elastic element, one end of which is elastically connected to the piezoelectric element, and the other end of which is elastically connected to the image processing unit, so that the image processing unit is suspended relative to the substrate. The base is used to apply a voltage to the piezoelectric element, causing the piezoelectric element to deform due to the inverse piezoelectric effect. The piezoelectric element pulls the image processing unit to move through the elastic element, compensating for camera shake during shooting, and achieving accurate and fast focusing by driving a lighter image processing unit.

Description

Technical Field

[0001] This disclosure relates to the field of camera technology, and more particularly to an optical image stabilization device, camera module, and electronic device. Background Technology

[0002] As imaging technology continues to advance across various terminal products, the industry is constantly increasing the image sensor size in pursuit of the ultimate photographic effect. Currently, the image sensor size has exceeded 1 inch, and the number of corresponding module lenses is also increasing, resulting in a significant increase in the weight of the lens. Consequently, the commonly used voice coil motors are severely lacking in driving force when performing OIS (Optical Image Sensor) motion.

[0003] To address the severe lack of driving force when the voice coil motor performs OIS (Optical Image Steering) motion, the industry has adopted larger magnets and higher currents to drive focusing. This significantly increases the size and power consumption of the module. In addition, the risk of the module being affected by external magnetic interference is also constantly increasing. Utility Model Content

[0004] This disclosure provides an optical image stabilization device, a camera module, and an electronic device to solve at least some of the related technical problems.

[0005] In a first aspect, embodiments of this disclosure provide an optical image stabilization device, comprising:

[0006] substrate;

[0007] The image processing unit is electrically connected to the substrate;

[0008] A piezoelectric driving assembly is located between the substrate and the image processing unit; the piezoelectric driving assembly includes a base and a piezoelectric body electrically connected to the base, the base being disposed on the substrate and electrically connected to the substrate; the piezoelectric body being disposed on the base and suspended relative to the substrate.

[0009] An elastic element is provided, with one end elastically connected to the piezoelectric body and the other end elastically connected to the image processing unit, so that the image processing unit is suspended relative to the substrate; the base is used to apply voltage to the piezoelectric body, so that the piezoelectric body deforms due to the inverse piezoelectric effect, and the piezoelectric body pulls the image processing unit to move through the elastic element.

[0010] In some possible implementations, the image processing unit includes a circuit board and an image sensor disposed on the circuit board, the circuit board being electrically connected to the substrate;

[0011] One end of the elastic element is elastically connected to the piezoelectric body, and the other end is elastically connected to the circuit board, so that the circuit board is suspended relative to the substrate; the piezoelectric body pulls the circuit board to move through the elastic element.

[0012] In some possible implementations, one end of the piezoelectric element is disposed on the base, and the other end is provided with a first spring sheet; the circuit board is provided with a second spring sheet corresponding to the position of the first spring sheet; one end of the elastic element is elastically connected to the first spring sheet, and the other end is elastically connected to the second spring sheet.

[0013] In some possible implementations, the piezoelectric drive assembly further includes a fixing member, with one end of the piezoelectric body disposed on the base and the other end disposed on the fixing member; the fixing member is suspended from the substrate, and the first spring is provided on the end of the fixing member facing away from the piezoelectric body.

[0014] In some possible implementations, the image processing unit includes an image sensor electrically connected to the substrate;

[0015] One end of the elastic element is elastically connected to the piezoelectric body, and the other end is elastically connected to the image sensor, so that the image sensor is suspended relative to the substrate; the piezoelectric body pulls the image sensor to move through the elastic element.

[0016] In some possible implementations, the piezoelectric drive assembly further includes two elastomers, both disposed on the base and located on either side of the piezoelectric element.

[0017] In some possible implementations, the piezoelectric drive assembly further includes a fixing member, with one end of both the piezoelectric body and the elastomer disposed on the base, and the other end of both the piezoelectric body and the elastomer disposed on the fixing member; the fixing member is suspended from the substrate, and one end of the elastomer is elastically connected to the fixing member.

[0018] In some possible implementations, the fixing member has a first spring at one end facing away from the piezoelectric body, and the image processing unit has a second spring corresponding to the position of the first spring; one end of the elastic member is elastically connected to the first spring, and the other end is elastically connected to the second spring.

[0019] In some possible implementations, the substrate has a receiving groove, and the piezoelectric drive assembly is disposed within the receiving groove.

[0020] In some possible implementations, there are multiple piezoelectric drive components distributed on the substrate; there are multiple elastic elements, which are arranged corresponding to the positions of the piezoelectric bodies of the multiple piezoelectric drive components.

[0021] In some possible implementations, the substrate is a square plate, and there are four piezoelectric drive components disposed at the four corners of the substrate; there are four elastic elements, which are disposed corresponding to the positions of the piezoelectric bodies of the four piezoelectric drive components.

[0022] In some possible implementations, the piezoelectric element extends along the diagonal direction of the substrate, one end of the piezoelectric element is disposed on the base, and the other end is elastically connected to the elastic element; the end of the piezoelectric element connected to the elastic element is located outside the end of the piezoelectric element connected to the base.

[0023] In some possible implementations, a flexible circuit board is also included, one end of which is connected to the substrate and the other end of which is connected to the image processing unit.

[0024] Secondly, embodiments of this disclosure provide a camera module including the optical image stabilization device described in the first aspect.

[0025] Thirdly, embodiments of this disclosure provide an electronic device including the camera module described in the second aspect.

[0026] The technical solutions provided by the embodiments of this disclosure can achieve at least the following beneficial technical effects:

[0027] The optical image stabilization device disclosed herein applies a voltage to a piezoelectric element via a base, causing the piezoelectric element to deform due to the inverse piezoelectric effect. The piezoelectric element can then pull the image processing unit to move via an elastic element, compensating for camera shake during shooting. By utilizing the inverse piezoelectric effect of the piezoelectric element, image stabilization or driving is achieved, thereby reducing image blur. By driving a lighter image processing unit, precise and fast focusing is achieved, thus solving the defects of related technologies such as large module size, high power consumption, and magnetic interference.

[0028] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of an optical image stabilization device according to an exemplary embodiment of the present disclosure.

[0031] Figure 2 yes Figure 1 An explosion diagram.

[0032] Figure 3 yes Figure 1 Cross-sectional view.

[0033] Figure 4 This is a schematic diagram of the structure of the piezoelectric drive assembly of an optical image stabilization device according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0034] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0035] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0036] The optical image stabilization device, camera module, and electronic device of this disclosure will now be described in detail with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can be combined with each other.

[0037] This disclosure provides an electronic device, which may be a smartphone, tablet computer, gimbal, or other mobile terminal. The electronic device may include a camera module, and the camera module may include an optical image stabilization device.

[0038] See Figures 1 to 4 As shown, the optical image stabilization device 100 may include: a substrate 10, an image processing unit 20, a piezoelectric drive assembly 30, and an elastic element 40.

[0039] The substrate 10 contains a circuit unit 11 that is electrically connected to the whole machine. The image processing unit 20 is electrically connected to the substrate 10, thereby being electrically connected to the circuit unit 11. The electrical connection between the whole machine and the image processing unit 20 is realized through the circuit unit 11.

[0040] The piezoelectric drive assembly 30 is located between the substrate 10 and the image processing unit 20. The piezoelectric drive assembly 30 includes a base 31 and a piezoelectric element 32 electrically connected to the base 31. The base 31 is disposed on and electrically connected to the substrate 10, meaning the circuit unit 11 is electrically connected to the base 31, thereby enabling circuit control of the piezoelectric drive assembly 30 to achieve optical image stabilization. The piezoelectric element 32 is disposed on the base 31 and suspended relative to the substrate 10, with a gap between them to avoid friction affecting its accuracy and increasing power consumption. Optionally, the base 31 and the substrate 10 are rigidly connected.

[0041] One end of the elastic element 40 (shown as the bottom end in the figure) is elastically connected to the piezoelectric element 32, and the other end (shown as the top end in the figure) is elastically connected to the image processing unit 20, so that the image processing unit 20 is suspended relative to the substrate 10, avoiding contact between components during movement, reducing friction, and thus reducing power consumption. Optionally, the elastic element 40 can be a suspension wire or metal wire made of metal, with its two ends welded to the substrate 10 and the piezoelectric drive assembly 30 respectively. In this embodiment, the image processing unit 20 is suspended above the substrate 10, and the piezoelectric element 32 of the piezoelectric drive assembly 30 is suspended between the substrate 10 and the image processing unit 20.

[0042] In this design, the substrate 10 can be considered a fixed part, and the image processing unit 20 can be considered a moving part. The base 31 is used to apply voltage to both ends of the piezoelectric element 32. The electrical signal is transmitted to the piezoelectric element 32 through the substrate 10 and the base 31, causing the piezoelectric element 32 to deform due to the inverse piezoelectric effect. By controlling the direction of the voltage across the piezoelectric element 32, the stretching and compression states of the piezoelectric element 32 can be controlled, thus achieving linear reciprocating motion. Utilizing the inverse piezoelectric effect to deform the piezoelectric element 32, the piezoelectric element 32 pulls the image processing unit 20 to move via the elastic element 40, compensating for camera shake during shooting.

[0043] Understandably, electronic devices may also include a gyroscope and a processor (hereinafter referred to as CPU). The CPU is electrically connected to the gyroscope and the optical image stabilization device of the camera module. The working principle of the optical image stabilization device 100 is as follows: When the mobile terminal takes a picture or video, the entire device is affected by external factors and will produce a certain amount of shaking. The gyroscope identifies and captures the shaking state and parameters of the entire device and feeds them back to the CPU. The CPU calculates and analyzes the compensation angle and displacement, transmits the signal to the camera module and issues a compensation command. The image processing unit of the optical image stabilization device moves under the drive of the piezoelectric drive component to compensate for the shaking during shooting and achieve image stabilization. Specifically, the electrical signal is transmitted to the piezoelectric body through the substrate and the base. Under the action of the electrical signal, the piezoelectric body generates the inverse piezoelectric effect and deforms, thereby driving the image processing unit to move to compensate for the shaking angle of the entire device.

[0044] The optical image stabilization device 100 disclosed herein applies a voltage to a piezoelectric element 32 via a base 31, causing the piezoelectric element 32 to deform due to the inverse piezoelectric effect. The piezoelectric element 32 can then pull the image processing unit 20 to move via an elastic element 40, compensating for camera shake during shooting. Image stabilization or driving is achieved using the inverse piezoelectric effect of the piezoelectric element 32, thereby reducing image blur. By driving the lighter image processing unit 20, precise and fast focusing is achieved. This realizes a piezoelectric-driven, suspended wire sensor-shift optical image stabilization device, solving the defects of related technologies such as insufficient motor driving force, poor focusing accuracy, large module size, high power consumption, and magnetic interference. It has advantages such as simple structure, small size, light weight, large driving force, low power consumption, high focusing accuracy, and no magnetic interference.

[0045] In some possible implementations, the optical image stabilization device 100 may further include a flexible circuit board 50, one end of which is connected to the substrate 10 and the other end to the image processing unit 20, thereby achieving electrical connection between the circuit unit 11 and the image processing unit 20. Optionally, the flexible circuit board 50 may be a U-shaped flexible printed circuit (FPC), and there may be two of them, connected between the substrate 10 and the image processing unit 20. The main function of the U-shaped flexible FPC is to achieve electrical connection between the image processing unit 20 and the circuit unit 11 of the substrate 10. Its material is a flexible circuit board, and when the image processing unit 20 moves, the U-shaped flexible FPC also deforms so as not to hinder the movement of the image processing unit 20. The U-shaped flexible design of the U-shaped flexible FPC is to avoid hindering the movement of the image processing unit 20.

[0046] In some possible implementations, the image processing unit 20 includes a circuit board 21 and an image sensor 22 disposed on the circuit board 21. The circuit board 21 may be a PCB board, electrically connected to the image sensor 22. It is understood that one end of the flexible circuit board 50 is connected to the substrate 10, and the other end is connected to the circuit board 21, enabling electrical connection between the circuit unit 11 and the circuit board 21. The image sensor 22 performs photoelectric conversion, converting light signals into electronic signals. The circuit board 21 is electrically connected to the substrate 10, thereby enabling electrical connection between the circuit board 21 and the circuit of the piezoelectric drive assembly 30.

[0047] One end of the elastic element 40 is elastically connected to the piezoelectric element 32, and the other end is elastically connected to the circuit board 21, so that the circuit board 21 is suspended relative to the substrate 10. A voltage is applied to both ends of the piezoelectric element 32 through the base 31, causing the piezoelectric element 32 to deform due to the inverse piezoelectric effect. The piezoelectric element 32, through the elastic element 40, pulls the circuit board 21 and the image sensor 22 together to move, achieving X, Y, and Rz rotational direction compensation to achieve anti-shake purposes. The elastic element 40 acts like a spring, limiting the circuit board 21, connecting the substrate 10 and the circuit board 21, suspending the circuit board 21 relative to the substrate 10, avoiding contact between the two to reduce friction and power consumption. The circuit board 21 can generate jitter compensation under the action of the piezoelectric drive assembly 30. Furthermore, since both the circuit board 21 and the piezoelectric element 32 are suspended relative to the substrate 10, contact between the components during movement is avoided, reducing friction and thus lowering power consumption.

[0048] When taking a picture, the gyroscope identifies the camera's shaking angle and calculates the amount of displacement that needs to be compensated. The CPU then sends a command to the optical image stabilization device in the camera module. In other words, the gyroscope feeds back the camera's shaking parameters to the optical image stabilization device. The piezoelectric drive component is driven by an electrical signal to deform the piezoelectric body, thereby causing the image processing unit to move in the X and Y directions and rotate in the Rz plane to compensate for the shaking during shooting.

[0049] Furthermore, the image processing unit 20 may also include a filter assembly 23 and electronic components 24. The number of electronic components 24 may be one or more, and they are disposed on the circuit board 21. The filter assembly 23 may include an infrared filter (IR), disposed directly above the image sensor 22, and bonded to the circuit board 21 with adhesive. The bonding area with the circuit board 21 must avoid the electronic components 24 to prevent assembly interference. The main function of the filter assembly 23 is to filter light. The bottom of the image sensor 22 is rigidly connected to the circuit board 21 with adhesive. The circuit board 21 contains logic circuitry that integrates the pins of the image sensor 22 and the electronic components 24.

[0050] In some possible implementations, multiple piezoelectric drive components 30 are distributed on the substrate 10. Multiple elastic elements 40 are also present, their number corresponding to the number of piezoelectric drive components 30, and their positions corresponding to the piezoelectric bodies 32 of the multiple piezoelectric drive components 30. Thus, when a voltage is applied to both ends of each piezoelectric body 32 through the base 31, each piezoelectric body 32 deforms due to the inverse piezoelectric effect, driving the image processing unit 20 to move via the corresponding elastic element 40. Through the cooperation of the various piezoelectric drive components 30, the image processing unit 20 can move in the X and Y directions and rotate in the Rz rotation direction, compensating for camera shake during shooting to achieve image stabilization.

[0051] In this embodiment, the substrate 10 is a square plate, and four piezoelectric drive components 30 are disposed at the four corners of the substrate 10. Four elastic elements 40 are also disposed corresponding to the positions of the piezoelectric bodies of the four piezoelectric drive components 30. Through the cooperation of the four piezoelectric drive components 30, the image processing unit 20 can move in the X and Y directions and rotate in the Rz rotation direction under the action of the piezoelectric drive components 30 at the four corners, thereby achieving displacement compensation for the overall machine jitter.

[0052] Furthermore, the piezoelectric element 32 extends along the diagonal direction of the substrate 10 and is positioned at a 45° angle to the base. One end of the piezoelectric element 32 is disposed on the base 31, and the other end is elastically connected to the elastic member 40. The end of the piezoelectric element 32 connected to the elastic member 40 is located outside the end of the piezoelectric element 32 connected to the base 31, that is, the elastic member 40 is connected to the end of the piezoelectric element 32 near the edge of the substrate 10. This allows the piezoelectric element 32 to drive the image processing unit 20 to move over a larger range, thereby improving the image stabilization effect.

[0053] In some possible implementations, one end of the piezoelectric element 32 is disposed on the base 31, and the other end is provided with a first spring 35. The circuit board 21 is provided with a second spring 25 corresponding to the position of the first spring 35. One end of the elastic element 40 is elastically connected to the first spring 35, and the other end is elastically connected to the second spring 25. The second spring 25 can provide support for the elastic element 40, realizing the elastic connection between the elastic element 40 and the circuit board 21, avoiding the rigid connection that would cause the elastic element 40 to be easily damaged. The first spring 35 and the second spring 25 are elastically connected through the elastic element 40, so that the circuit board 21 is in a suspended state, avoiding contact between the components during movement, reducing friction, and thus reducing power consumption. It can be understood that the function of the first spring 35 and the second spring 25 is to connect and fix the elastic element 40, so that the circuit board 21 is suspended, which facilitates its displacement and rotation under force. In addition, the function of the first spring 35 and the second spring 25 also includes realizing the elastic connection of the elastic element, avoiding stress concentration in the elastic element, and improving the service life of the elastic element.

[0054] Combination Figures 2 to 4 As shown, the first spring plate 35 has a first through hole 36, and the second spring plate 25 has a second through hole 26 corresponding to the position of the first through hole 36. The elastic member 40 passes through the first through hole 36 and the second through hole 26, and the two ends of the elastic member 40 are respectively locked to the first spring plate 35 and the second spring plate 25 through the mounting member 41.

[0055] Optionally, both the first spring 35 and the second spring 25 can be metal springs. The second spring 25 can be rigidly connected to the circuit board 21 by welding or riveting. The elastic element 40 and the second spring 25 are elastically connected. When the circuit board 21 moves, the second spring 25 can undergo slight deformation, thus preventing excessive stress on the elastic element 40 and preventing failure, thereby increasing the reliability of the elastic element 40. The first spring 35 is fixed to the elastic element 40 by glue or welding. Its main function is to achieve an elastic connection between the elastic element 40 and the second spring 25, allowing the circuit board 21 to be suspended.

[0056] Understandably, the number of first spring pieces 35 and second spring pieces 25 corresponds to the number of piezoelectric drive components 30 and elastic elements 40. In this embodiment, there are four piezoelectric drive components 30 and four elastic elements 40, and the number of first spring pieces 35 and second spring pieces 25 is also four. The four piezoelectric drive components 30 are disposed at the four corners of the substrate 10, and the four second spring pieces 25, corresponding to the positions of the four drive piezoelectric components 30, are disposed at the four corners of the circuit board 21.

[0057] In some possible implementations, the piezoelectric drive assembly 30 further includes a fixing member 34. One end of the piezoelectric body 32 is disposed on the base 31, and the other end is disposed on the fixing member 34. Both ends of the piezoelectric body 32 are rigidly connected to the base 31 and the fixing member 34 respectively, ensuring the stability of the movement of the piezoelectric body 32. The fixing member 34 is suspended from the substrate 10, and the fixing member 34 and the piezoelectric body 32 form a cantilever state with a gap between them and the substrate 10 to avoid friction affecting its accuracy and increasing power consumption. The end of the fixing member 34 facing away from the piezoelectric body 32 is provided with a first spring piece 35. The first spring piece 35 and the second spring piece 25 are elastically connected by an elastic member 40, so that the circuit board 21 is in a suspended state, avoiding contact between the components during movement, reducing friction, and thus reducing power consumption.

[0058] In some possible implementations, the piezoelectric drive assembly 30 further includes two elastic bodies 33, both disposed on the base 31 and located on both sides of the piezoelectric body 32. The two elastic bodies 33 are of equal length and work together with the piezoelectric body 32 to achieve a vibration reduction effect, forming a force balance system with the piezoelectric body 32 to ensure the stability of the piezoelectric drive assembly. In addition, the function of the elastic bodies 33 also includes enabling the piezoelectric body 32 to quickly return to its original state under the action of elastic force when the voltage across the piezoelectric body 32 is removed.

[0059] One end of both the piezoelectric element 32 and the elastomer 33 is disposed on the base 31, and the other end of both the piezoelectric element 32 and the elastomer 33 is disposed on the fixing member 34. Both ends of the piezoelectric element 32 and the elastomer 33 are rigidly connected to the base 31 and the fixing member 34 to ensure the stability of the movement of the piezoelectric element 32. The base 31 and the fixing member 34 serve to fix the piezoelectric element 32 and the elastomer 33. The fixing member 34 is suspended from the substrate 10, with a gap between them to avoid friction affecting its accuracy and increasing power consumption. One end of the elastomer 40 is elastically connected to the fixing member 34.

[0060] Optionally, the fixing member 34 has a first spring 35 at the end facing away from the piezoelectric body 32, and the circuit board 21 of the image processing unit 20 has a second spring 25 corresponding to the position of the first spring 35. One end of the elastic member 40 is elastically connected to the first spring 35, and the other end is elastically connected to the second spring 25. The fixing member 34 has a first spring 35 at the end facing away from the piezoelectric body 32, and the first spring 35 and the second spring 25 are elastically connected through the elastic member 40, so that the image processing unit 20 is in a suspended state, avoiding contact between the components during movement, reducing friction, and thus reducing power consumption.

[0061] When an electrical signal is transmitted to the piezoelectric element 32 through the substrate 10 and the base 31, the piezoelectric element 32 deforms, causing the first elastic piece 35 to undergo planar displacement. This displacement is then transmitted through the elastic element 40 to the second elastic piece 25, thereby moving the circuit board 21. The piezoelectric element 32 can be stretched or compressed by controlling the direction of the control circuit, and its deformation can be controlled by controlling the magnitude of the electrical signal. Under the combined action of the piezoelectric element 32 and the elastic element 33, the piezoelectric drive assembly 30 can output movement, that is, movement to the circuit board 21.

[0062] In some possible embodiments, the substrate 10 has a receiving groove 12, and the piezoelectric drive assembly 30 is disposed within the receiving groove 12. It is understood that the substrate 10 is recessed and cut out to create clearance at the mounting position of the piezoelectric drive assembly 30, facilitating the installation and fixation of the piezoelectric drive assembly 30 and reducing the overall device height. Optionally, such as... Figure 4 As shown, the two ends of the receiving groove 12 form a first groove 121 and a second groove 122 respectively. The base 31 is disposed in the first groove 121, and the first spring piece 35 is disposed in the second groove 122 to provide space for the elastic member 40.

[0063] It should be noted that, in addition to the above-described embodiment including circuit board 21 and image sensor 22, in other embodiments, image processing unit 20 may not include circuit board 21, but only image sensor 22, which is electrically connected to substrate 10. Correspondingly, one end of flexible circuit board 50 is connected to substrate 10, and the other end can be connected to image sensor 22, realizing electrical connection between circuit unit 11 and image sensor 22. Second spring contact 25 can be directly disposed on image sensor 22.

[0064] One end of the elastic element 40 is elastically connected to the piezoelectric element 32, and the other end is elastically connected to the image sensor 22, so that the image sensor 22 is suspended relative to the substrate 10. A voltage is applied to both ends of the piezoelectric element 32 through the base 31, so that the piezoelectric element 32 deforms due to the inverse piezoelectric effect. The piezoelectric element 32 pulls the image sensor 22 to move together through the elastic element 40, so as to achieve X, Y and Rz rotation direction compensation and achieve the purpose of image stabilization.

[0065] The optical image stabilization device disclosed herein, through the above-described technical solution, has the following beneficial effects:

[0066] 1. It adopts sensor-shift optical image stabilization, which can effectively overcome the shortcomings of insufficient driving force of conventional OIS motors compared with the current related technologies that use lens-shift optical image stabilization. It also has advantages such as low power consumption, small size and light weight.

[0067] 2. Driven by the inverse piezoelectric effect principle of piezoelectric materials, it has high precision and supports chip rotation compensation of image processing units, resulting in better image stabilization.

[0068] 3. It contains no electromagnetic devices, so it will not be affected by external magnetic interference.

[0069] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An optical image stabilization device, characterized by comprising: include: substrate; The image processing unit is electrically connected to the substrate; A piezoelectric driving assembly is located between the substrate and the image processing unit; the piezoelectric driving assembly includes a base and a piezoelectric body electrically connected to the base, the base being disposed on the substrate and electrically connected to the substrate; the piezoelectric body being disposed on the base and suspended relative to the substrate. An elastic element, one end of which is elastically connected to the piezoelectric element and the other end of which is elastically connected to the image processing unit, so that the image processing unit is suspended relative to the substrate. The base is used to apply voltage to the piezoelectric element, causing the piezoelectric element to deform due to the inverse piezoelectric effect, and the piezoelectric element pulls the image processing unit to move through the elastic element.

2. The optical image stabilizer according to claim 1, characterized by The image processing unit includes a circuit board and an image sensor disposed on the circuit board, and the circuit board is electrically connected to the substrate. One end of the elastic element is elastically connected to the piezoelectric body, and the other end is elastically connected to the circuit board, so that the circuit board is suspended relative to the substrate; the piezoelectric body pulls the circuit board to move through the elastic element.

3. The optical image stabilizer according to claim 2, wherein One end of the piezoelectric element is disposed on the base, and the other end is provided with a first spring sheet. The circuit board is provided with a second spring sheet corresponding to the position of the first spring sheet. One end of the elastic element is elastically connected to the first spring sheet, and the other end is elastically connected to the second spring sheet.

4. The optical image stabilizer according to claim 3, characterized by The piezoelectric drive assembly further includes a fixing member, one end of the piezoelectric body is disposed on the base, and the other end is disposed on the fixing member; the fixing member is suspended from the substrate, and the first spring is provided on the end of the fixing member facing away from the piezoelectric body.

5. The optical image stabilizer according to claim 1, wherein The image processing unit includes an image sensor, which is electrically connected to the substrate. One end of the elastic element is elastically connected to the piezoelectric body, and the other end is elastically connected to the image sensor, so that the image sensor is suspended relative to the substrate; the piezoelectric body pulls the image sensor to move through the elastic element.

6. The optical image stabilizer according to claim 1, characterized by The piezoelectric drive assembly also includes two elastomers, both disposed on the base and located on both sides of the piezoelectric body.

7. The optical image stabilizer according to claim 6, wherein The piezoelectric drive assembly further includes a fixing member, one end of the piezoelectric body and the elastic body are both disposed on the base, and the other end of the piezoelectric body and the elastic body are both disposed on the fixing member; the fixing member is suspended from the substrate, and one end of the elastic body is elastically connected to the fixing member.

8. The optical image stabilizer according to claim 7, wherein The fixing member has a first spring piece at one end facing away from the piezoelectric body, and the image processing unit has a second spring piece corresponding to the position of the first spring piece; one end of the elastic member is elastically connected to the first spring piece, and the other end is elastically connected to the second spring piece.

9. The optical image stabilizer according to claim 1, wherein The substrate has a receiving groove, and the piezoelectric drive assembly is disposed in the receiving groove.

10. The optical image stabilizer according to claim 1, characterized by There are multiple piezoelectric drive components distributed on the substrate; there are multiple elastic elements, which are arranged corresponding to the positions of the piezoelectric bodies of the multiple piezoelectric drive components.

11. The optical image stabilization apparatus according to claim 10, wherein The substrate is a square plate, and there are four piezoelectric driving components, which are disposed at the four corners of the substrate; there are four elastic elements, which are disposed corresponding to the positions of the piezoelectric bodies of the four piezoelectric driving components.

12. The optical image stabilizer according to claim 11, wherein The piezoelectric element extends along the diagonal direction of the substrate, with one end of the piezoelectric element disposed on the base and the other end elastically connected to the elastic element; the end of the piezoelectric element connected to the elastic element is located outside the end of the piezoelectric element connected to the base.

13. The optical image stabilization device according to claim 1, characterized in that, It also includes a flexible circuit board, one end of which is connected to the substrate and the other end of which is connected to the image processing unit.

14. A camera module, comprising: The optical image stabilization device includes any one of claims 1-13.

15. An electronic device, comprising: Includes the camera module as described in claim 14.

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