Anti-shake mechanism, camera module and electronic equipment

Abstract

The invention relates to an anti-shake mechanism, a camera module and electronic equipment. The anti-shake mechanism comprises a base, a piezoelectric actuator and a rotation output element. The piezoelectric driver is arranged on the base and comprises a piezoelectric body and a friction head arranged on the piezoelectric body. The rotating output element is provided with a contact surface, and the contact surface is a spherical surface and is in contact with the friction head; wherein the piezoelectric actuator is configured in a way that the friction head can generate displacement components along two orthogonal directions under the deformation action of the piezoelectric main body, so as to drive the rotation output element to rotate around the sphere center of the contact surface. The anti-shake mechanism is simple in structure, small in occupied space, high in driving precision, high in response speed and beneficial to compression of the size of the anti-shake mechanism and improvement of the performance reliability of the anti-shake mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical image stabilization, and in particular to an image stabilization mechanism, an image capturing module, and an electronic device. BACKGROUND

[0002] With the rapid development of camera technology, some electronic devices use a periscopic design of the camera module, that is, a reflecting prism is used in the camera module to deflect the light path, so as to compress the occupied space of the camera module in the thickness direction of the electronic device while realizing long-focus design, which is beneficial to the miniaturization design of the electronic device. In the periscopic design of the camera module, the optical image stabilization effect can be achieved by driving the reflecting prism to rotate.

[0003] However, in the conventional camera module, the precision and reliability of the image stabilization mechanism for driving the reflecting prism to rotate are poor, which is difficult to meet the demand of high-quality imaging. SUMMARY

[0004] Embodiments of the present application provide an image stabilization mechanism, an image capturing module, and an electronic device to solve the problem of poor precision and reliability of the image stabilization mechanism in the conventional camera module.

[0005] An image stabilization mechanism comprises:

[0006] a base;

[0007] a piezoelectric driver disposed on the base and comprising a piezoelectric body and a friction head disposed on the piezoelectric body; and

[0008] a rotation output element having a contact surface, the contact surface being a spherical surface and being in contact with the friction head;

[0009] wherein the piezoelectric driver is configured such that the friction head can generate displacement components in two orthogonal directions under the deformation of the piezoelectric body to drive the rotation output element to rotate around the spherical center of the contact surface.

[0010] An image capturing module comprises an optical mechanism and the image stabilization mechanism as described above, and the optical mechanism is connected to the rotation output element of the image stabilization mechanism.

[0011] An electronic device comprises the image capturing module as described above.

[0012] The aforementioned image stabilization mechanism achieves optical image stabilization by controlling the displacement components of the friction head of a piezoelectric actuator in two orthogonal directions to rotate the output element. The piezoelectric actuator has a simple structure, occupies little space, offers high driving precision, and has a fast response speed, which helps to reduce the size of the image stabilization mechanism. It also helps to reduce the complexity of the circuit design, improving the response speed, precision, and practicality of the image stabilization mechanism. Furthermore, the rotational stroke of the output element is less likely to be limited, which helps to increase the range of optical image stabilization. Moreover, after power is off, the contact between the piezoelectric actuator and the contact surface can also limit the rotational output element, preventing it from shaking and affecting the imaging effect, thus improving the performance and reliability of the image stabilization mechanism. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of an electronic device in some embodiments.

[0015] Figure 2 This is a schematic diagram of the camera module in some embodiments.

[0016] Figure 3 for Figure 2 The diagram shows the structure of the camera module from another angle.

[0017] Figure 4 This is a schematic diagram of the optical path of the camera module in some embodiments.

[0018] Figure 5 for Figure 3 The diagram shows a cross-sectional view of the camera module along the AA direction.

[0019] Figure 6 This is a schematic diagram of the structure of some components of the camera module in some embodiments.

[0020] Figure 7 This is a schematic diagram of the structure of another component of the camera module in some embodiments.

[0021] Figure 8 for Figure 2 The diagram shows the structure of the camera module from another angle.

[0022] Figure 9 This is a schematic diagram of the structure of a piezoelectric actuator in some embodiments.

[0023] Figure 10 Fig. 6 is a schematic diagram of a working mode of a piezoelectric driver in some embodiments.

[0024] Figure 11 Fig. 7 is a schematic diagram of a structure of a piezoelectric driver in some embodiments.

[0025] Figure 12 Fig. 8 is a schematic diagram of a structure of a piezoelectric driver in some embodiments.

[0026] Figure 13 Fig. 9 is a schematic diagram of other elements of an electronic device in some embodiments.

[0027] Reference Signs:

[0028] 10, electronic device; 11, camera module; 111, optical mechanism; 1111, light-in surface; 1112, light-out surface; 1113, reflecting surface; 112, lens; 113, image sensor; 12, housing; 121, light-in hole; 20, anti-shake mechanism; 21, base; 211, first wall; 212, second wall; 213, third wall; 214, fourth wall; 215, inclined surface; 216, rolling surface; 22, piezoelectric driver; 221, piezoelectric body; 2211, elastic base; 2212, piezoelectric layer; 222, friction head; 23, rotating output element; 231, rotating output body; 232, magnetic structure; 233, contact surface; 24, rolling element; 25, limiting wall; 26, elastic pre-tightening element; 27, magnetic attraction element. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present application, a more comprehensive description will be made below with reference to the relevant drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0030] As used herein, “electronic device” refers to, but is not limited to, a device capable of receiving and / or sending communication signals via any one or more of the following connection means:

[0031] (1) via a wired line connection means, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection;

[0032] (2) Via wireless interface, such as cellular network, wireless local area network (WLAN), digital television network such as DVB-H network, satellite network, AM-FM broadcast transmitter.

[0033] An electronic device configured to communicate via a wireless interface can be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:

[0034] (1) Satellite phone or cellular phone;

[0035] (2) A Personal Communications System (PCS) terminal that can combine cellular radio telephone with data processing, fax and data communication capabilities;

[0036] (3) Radio telephone, pager, Internet / intranet access, web browser, notepad, calendar, personal digital assistant (PDA) equipped with a Global Positioning System (GPS) receiver;

[0037] (4) Conventional above-knee and / or palm-sized receivers;

[0038] (5) Conventional knee-mounted and / or handheld wireless telephone transceivers, etc.

[0039] Please see Figure 1 and Figure 2 , Figure 1 The following are schematic diagrams illustrating the structure of the electronic device 10 in some embodiments of this application. Figure 2 The diagram shows a schematic representation of the camera module 11 in some embodiments of this application. The electronic device 10 provided in this application includes, but is not limited to, any suitable mobile terminal such as a smartphone, tablet computer, or e-reader; a smartphone is used as an example in this application. The electronic device 10 may include a housing 12 and a camera module 11. The housing 12 has a light-entry hole 121, and the camera module 11 is disposed within the housing 12 and can collect ambient light through the light-entry hole 121 to achieve the camera function.

[0040] Combination Figure 3 and Figure 4As shown, in some embodiments, the camera module 11 includes a stabilization mechanism 20 and an optical mechanism 111. The optical mechanism 111 can be a prism. The imaging optical path of the camera module 11 passes through the optical mechanism 111. The stabilization mechanism 20 is used to drive the optical mechanism 111 to move relative to the housing 12 to achieve the optical stabilization function of the camera module 11. The movement of the optical mechanism 111 relative to the housing 12 is used to counteract the shaking of the housing 12 and improve the imaging quality of the camera module 11.

[0041] For example, in some embodiments, the optical mechanism 111 is a prism, and the optical mechanism 111 includes two intersecting light-incident surfaces 1111, light-outceasing surfaces 1112, and reflecting surfaces 1113. The camera module 11 also includes a lens 112 and an image sensor 113. The lens 112 includes one or more lenses with optical power, and the image sensor 113 includes, but is not limited to, a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS). The lens 112 is disposed on the side of the optical mechanism 111 corresponding to the light-incident surface 1111, and its two ends are respectively opposite to the light-incident aperture 121 and the light-incident surface 1111. The image sensor 113 is disposed on the side of the optical mechanism 111 corresponding to the light-outceasing surface 1112, and the photosensitive surface of the image sensor 113 is opposite to the light-outceasing surface 1112.

[0042] Understandably, light entering the camera module 11 through the light inlet 121 can be adjusted by the lenses in the lens 112 and then enter the optical mechanism 111 through the light inlet surface 1111. After being reflected by the reflective surface 1113, it is then emitted from the light outlet surface 1112 onto the image sensor 113 to form an image. When the image stabilization mechanism 20 drives the optical mechanism 111 to move relative to the housing 12, that is, relative to the image sensor 113 and the lens 112, it can change the exit position and / or exit angle of the light after being reflected by the reflective surface 1113, thereby compensating for the shaking of the housing 12 and realizing the optical image stabilization function.

[0043] In this application, taking the light-incident surface 1111 and the light-exit surface 1112 as perpendicular, the axis of the lens 112 as perpendicular to the light-incident surface 1111, the photosensitive surface of the image sensor 113 as parallel to and opposite to the light-exit surface 1112, and the angle between the reflective surface 1113 and both the light-incident surface 1111 and the light-exit surface 1112 as 45° as an example, the optical mechanism 111 can deflect the light path by 90° through reflection, thereby transferring part of the light path from the thickness direction of the electronic device 10 to the length and width direction, realizing a periscope design, so as to compress the size of the camera module 11 in the thickness direction of the electronic device 10, which is beneficial to realizing the miniaturization design of the electronic device 10.

[0044] Further, refer toFigure 5 , Figure 6 and Figure 7 As shown, in some embodiments, the anti-shake mechanism 20 includes a base 21, a piezoelectric actuator 22, and a rotation output element 23. The piezoelectric actuator 22 is disposed on the base 21 and includes a piezoelectric body 221 and a friction head 222 disposed on the piezoelectric body 221. The rotation output element 23 has a contact surface 233, which is spherical and contacts the friction head 222. The piezoelectric actuator 22 is configured such that the friction head 222 can generate displacement components in two orthogonal directions under the deformation of the piezoelectric body 221, thereby driving the rotation output element 23 to rotate about the center of the sphere of the contact surface 233.

[0045] It is understandable that when the friction head 222 moves under the deformation of the piezoelectric body 221, due to the contact between the friction head 222 and the contact surface 233, the frictional force between the friction head 222 and the contact surface 233 can be used to drive the rotating output element 23 to rotate around the center of the ball of the contact surface 233. Figure 7 Two dashed arrows indicate the directions of two displacement components generated by the friction head 222 under the deformation of the piezoelectric body 221. When the friction head 222 generates displacement components along two orthogonal directions, the displacement components along the two orthogonal directions can respectively drive the rotation output element 23 to rotate around two mutually perpendicular axes passing through the center of the ball of the contact surface 233, so that the rotation output element 23 generates rotational motion around the center of the ball of the contact surface 233, thereby achieving optical image stabilization.

[0046] The aforementioned image stabilization mechanism 20 achieves optical image stabilization by controlling the displacement components of the friction head 222 of a piezoelectric actuator 22 in two orthogonal directions to rotate the output element 23. The piezoelectric actuator 22 has a simple structure, occupies little space, has high driving precision, and a fast response speed, which helps to reduce the size of the image stabilization mechanism 20. It also helps to reduce the complexity of the circuit design of the image stabilization mechanism 20, improving its response speed, precision, and practicality. Furthermore, the rotational stroke of the output element 23 is less likely to be limited, which helps to increase the stroke of optical image stabilization. Moreover, after power is off, the contact between the piezoelectric actuator 22 and the contact surface 233 can also limit the rotational output element 23, preventing it from shaking and affecting the imaging effect, thus improving the performance reliability of the image stabilization mechanism 20.

[0047] Compared to traditional electromagnetic motor-based anti-shake mechanisms, the anti-shake mechanism 20 provided in this application is less susceptible to electromagnetic interference, does not easily shake after power failure, and can achieve power-off self-locking. It also boasts advantages such as compact structure, long stroke, high precision, large driving force, and miniaturization. Achieving two degrees of freedom through a single piezoelectric actuator 22 further reduces the difficulty of setting up circuit components such as flexible circuit boards in the anti-shake mechanism 20, thereby lowering manufacturing costs.

[0048] In some embodiments, a piezoelectric actuator 22 is used in the image stabilization mechanism 20. The piezoelectric actuator 22 can be programmed to drive the optical mechanism 111 to reset before power is cut off. After power is cut off, the piezoelectric actuator 22 can provide a limit to the optical mechanism 111, so that the optical mechanism 111 remains in the reset state, which is not easy to shake and generate abnormal noise. It can realize the return-to-center and power-off self-locking functions, and improve the reliability of the image stabilization mechanism 20.

[0049] refer to Figure 5 As shown, in some embodiments, the friction head 222 is capable of generating displacement components along two orthogonal directions on a first plane, which is a virtual plane not shown in the figure. Figure 7 The paper plane shown may be parallel to the first plane. In some embodiments, the first plane is parallel to the tangential plane of the contact position between the contact surface 233 and the friction head 222, and perpendicular to the radial direction of the contact position between the contact surface 233 and the friction head 222. This configuration allows the displacement component generated by the friction head 222 on the first plane to better match the rotational motion of the contact surface 233, and the displacement component of the friction head 222 to act more directly on the contact surface 233, thereby achieving a larger rotational displacement of the rotational output element 23 with the same displacement component.

[0050] In some embodiments, the base 21 is provided with a rolling surface 216, which is spherical and opposite to the contact surface 233. The anti-shake mechanism 20 also includes a rolling element 24, which includes, but is not limited to, a ball bearing. The rolling element 24 is disposed between the rolling surface 216 and the contact surface 233 and rolls in cooperation with both the rolling surface 216 and the contact surface 233. The cooperation between the rolling surface 216 and the rolling element 24 not only improves the smoothness of the rotation of the rotation output element 23 around the center of the ball of the contact surface 233, but also provides radial support and limiting effect for the rotation output element 23, reducing the risk of swaying of the rotation output element 23 and improving the structural and performance reliability of the anti-shake mechanism 20.

[0051] refer to Figure 6 and Figure 8 As shown, in some embodiments, the anti-shake mechanism 20 further includes a limiting wall 25. The limiting wall 25 is connected to the base 21 and is disposed around the rolling element 24 and the rolling surface 216. The limiting wall 25 protrudes from the surface of the base 21 facing the rotating output element 23. The portion of the surface of the base 21 facing the rotating output element 23 within the area enclosed by the limiting wall 25 can be configured as a spherical surface to form the rolling surface 216. The limiting wall 25 can provide a limiting effect on the rolling element 24, restrict the rolling range of the rolling element 24, prevent the rolling element 24 from falling off, and improve the structural and performance reliability of the anti-shake mechanism 20.

[0052] In some embodiments, the limiting wall 25 is spaced apart from the contact surface 233, so that while the limiting wall 25 provides a limiting function for the rolling element 24, it does not easily increase the friction between the base 21 and the rotating output element 23, thereby improving the smoothness of the movement of the rotating output element 23. The number of rolling elements 24 is not limited, and can be set according to the rotation, support and limiting requirements of the rotating output element 23. In the accompanying drawings of this application, four rolling elements 24 are provided as an example.

[0053] Please see again. Figure 5 In some embodiments, the central axis of the piezoelectric actuator 22 is perpendicular to the first plane and passes through the center of the ball of the contact surface 233, and the central axis of the rolling surface 216 passes through the center of the ball of the contact surface 233. The central axes of the piezoelectric actuator 22 and the rolling surface 216 are coplanar. The central axis of the piezoelectric actuator 22 can be understood as a straight line passing through the geometric center of the projection of the piezoelectric actuator 22 onto the first plane and perpendicular to the first plane. The central axis of the rolling surface 216 can be understood as a straight line passing through the geometric center (the vertex of the rolling surface 216) and the center of the ball of the rolling surface 216. This arrangement ensures that the radial support forces exerted by the piezoelectric actuator 22 and the rolling element 24 on the rotating output element 233 are located in the same plane. This allows the piezoelectric actuator 22 and the rolling element 24 to better support the rotating output element 23, improving the performance and structural reliability of the anti-shake mechanism 20.

[0054] In some embodiments, the rolling surface 216 and the piezoelectric actuator 22 are located on opposite sides of the rotating output element 23, and the central axis of the piezoelectric actuator 22 passes through the rolling surface 216. For example, the central axis of the piezoelectric actuator 22 can coincide with the central axis of the rolling surface 216. With this configuration, the rolling element 24 can provide a force to the rotating output element 23 on the side of the rotating output element 23 facing away from the piezoelectric actuator 22, that is, apply a preload force to the rotating output element 23 to press it against the friction head 222, so that the piezoelectric actuator 22 can drive the rotating output element 23 to move more smoothly. At the same time, the rolling element 24 can also form a good fit with the piezoelectric actuator 22, providing an effective limiting effect on the rotating output element 23, preventing the rotating output element 23 from shaking and deviating, and improving the reliability of the anti-shake mechanism 20.

[0055] In some embodiments, the anti-shake mechanism 20 further includes an elastic preload member 26, which is disposed on the base 21 and located between the piezoelectric actuator 22 and the base 21. The elastic preload member 26 applies an elastic force to the piezoelectric actuator 22 pointing towards the contact surface 233, that is, applies a preload force that causes the friction head 222 of the piezoelectric actuator 22 to abut against the rotating output element 23. The provision of the elastic preload member 26 can compensate for the assembly tolerance between the piezoelectric actuator 22 and the base 21 and the rotating output element 23, and provide a preload force to the piezoelectric actuator 22, so that the piezoelectric actuator 22 can smoothly drive the rotating output element 23 to move, thereby improving the reliability of the anti-shake mechanism 20. The elastic preload member 26 includes, but is not limited to, low-modulus adhesive tape such as foam tape or double-sided tape, or elastic elements such as springs or sheet springs.

[0056] In some embodiments, the rotation output element 23 includes a rotation output body 231 and a magnetic structure 232. The magnetic structure 232 is disposed on the rotation output body 231. The anti-shake mechanism 20 also includes a magnetic attractor 27, which is disposed on the base 21 and magnetically engages with the magnetic structure 232. Through the magnetic engagement between the magnetic attractor 27 and the magnetic structure 232, a preload force can be applied to the rotation output element 23 to press it against the friction head 222, so that the movement of the friction head 222 can effectively drive the rotation output element 23 to rotate, thereby improving the reliability of the anti-shake mechanism 20. In some embodiments, the magnetic attractor 27 includes, but is not limited to, any suitable element capable of generating a magnetic field, such as a magnet or a magnetite. The magnetic structure 232 includes, but is not limited to, any suitable element capable of being magnetically attracted by the magnetic attractor 27, such as a metal or its alloy, metal oxide and ceramic, or composite material. For example, it can be a steel sheet, a magnet, or a magnetite.

[0057] refer to Figure 5 As shown, in some embodiments, at least a portion of the surface of the rotating output body 231 is spherical, and the surface of the magnetic structure 232 facing the rotating output body 231 is a spherical surface adapted to the surface of the rotating output body 231 and connected to the surface of the rotating output body 231. The surface of the magnetic structure 232 facing away from the rotating output body 231 forms a contact surface 233. That is, while the magnetic structure 232 magnetically engages with the magnetic attractor 27 to provide preload force to the rotating output element 23, the magnetic structure 232 also acts as a contact friction interface with the friction head 222, which simplifies the structural design of the anti-shake mechanism 20 and reduces manufacturing costs.

[0058] In some embodiments, the magnetic structure 232 may be made of a material with a rough surface, or the surface of the magnetic structure 232 facing away from the rotating output body 231 may be roughened to form a rough contact surface 233, which can increase the friction between the contact surface 233 and the friction head 222, so that the friction head 222 can more effectively drive the rotating output element 23 to rotate.

[0059] In some embodiments, the rotating output element 23 may also include a friction structure (not shown). The friction structure and the magnetic structure 232 are separate structures. The friction structure is disposed on the rotating output body 231, and the surface of the friction structure facing away from the rotating output body 231 forms a contact surface 233. In embodiments where the rotating output element 23 has a friction structure, the location of the magnetic structure 232 is not limited. For example, it can be embedded inside the friction structure, or disposed between the friction structure and the rotating output body 231, or embedded on the rotating output body 231, as long as it can magnetically engage with the magnetic attractor 27. In this embodiment, the friction structure can be made of a material with a rough surface, or the surface of the friction structure facing away from the rotating output body 231 can be roughened to form a rough contact surface 233, which can increase the friction between the contact surface 233 and the friction head 222, so that the friction head 222 can more effectively drive the rotating output element 23 to rotate. Specifically, the material of the friction structure can be the same as the material of the friction head 222.

[0060] In some other embodiments, magnetic attracting elements 27, such as magnets, may also be disposed on the surface or inside of the rotating output body 231, and magnetic structures 232, such as steel sheets, may also be disposed on the base 21. Similarly, the magnetic attraction of the magnetic attracting elements 27 and magnetic structures 232 can be used to apply a preload force to the rotating output element 23 pointing towards the piezoelectric actuator 22.

[0061] refer to Figure 5 and Figure 6 As shown, in some embodiments, when the anti-shake mechanism 20 is equipped with a rolling element 24 and a magnetic attractor 27, the central axis of the piezoelectric actuator 22 intersects the central axis of the rolling surface 216. For example, the central axis of the piezoelectric actuator 22 can be perpendicular to the central axis of the rolling surface 216, or form any other applicable angle of intersection. On the plane containing the central axis of the piezoelectric actuator 22 and the central axis of the rolling surface 216, the magnetic attractor 27 is located between the central axis of the piezoelectric actuator 22 and the central axis of the rolling surface 216. With this arrangement, the positions of the magnetic attractor 27, the piezoelectric actuator 22, and the rolling element 24 can be mutually adapted. The magnetic attraction between the rolling element 24 and the magnetic structure 232 allows the contact surface 233 to be in close contact with the friction head 222 and the rolling element 24, which not only improves the sensitivity of the rotational drive element but also enhances the structural reliability of the anti-shake mechanism 20.

[0062] In some embodiments, the rotating output body 231 is generally a hemispherical structure, having interconnected spherical and planar surfaces. The planar surface is connected to the reflective surface 1113 of the optical mechanism 111, meaning the reflective surface 1113 is connected to the side of the rotating output element 23 facing away from the contact surface 233. The magnetic structure 232 is generally a spherical sheet structure, fitted onto a portion of the surface of the rotating output body 231, and can be fixedly connected to the rotating output body 231 by any applicable method such as adhesive. The surface of the magnetic structure 232 facing away from the rotating output body 231 forms the contact surface 233. When the rotating output element 23 rotates around the center of the contact surface 233 under the drive of the piezoelectric actuator 22, it can drive the optical mechanism 111 to rotate, thereby changing the exit angle of light after reflection by the optical mechanism 111 and achieving optical image stabilization.

[0063] Combination Figure 5 and Figure 6 As shown, in some embodiments, the base 21 includes a first wall 211, a second wall 212, a third wall 213, and a fourth wall 214. The first wall 211 and the second wall 212 intersect and are connected. A rolling surface 216 is formed on the side of the first wall 211 facing the rotating output element 23. The piezoelectric actuator 22 is disposed on the second wall 212. The third wall 213 and the fourth wall 214 are both connected to the first wall 211 and the second wall 212, and are both located on opposite sides of the rotating output element 23. The base 21 also has an inclined surface 215 located between the first wall 211 and the second wall 212. The inclined surface 215 is inclined to the surfaces of the first wall 211 and the second wall 212 facing the rotating output element 23, and a magnetic suction member 27 is disposed on the inclined surface 215. Thus, the base 21 can accommodate the piezoelectric actuator 22, the magnetic suction element 27 and the rolling element 24, and can also house the rotating output element 23 and the optical mechanism 111 within the space formed by the base 21, providing limiting and protection for the rotating output element 23 and improving structural reliability.

[0064] It should be noted that in the above embodiments of this application, the optical mechanism 111 is used as a prism, and the image stabilization mechanism 20 is used to drive the prism to move in order to achieve optical image stabilization. In other embodiments, the image stabilization mechanism 20 can also be used as a micro-gimbal in the camera module 11 of the electronic device 10. In this case, the optical mechanism 111 can be a lens 112, and the image stabilization mechanism 20 is used to drive the lens 112 to rotate in order to achieve the optical image stabilization function of the micro-gimbal. In still other embodiments, the camera module 11 can also be a small UAV optoelectronic pod. In this case, the image stabilization mechanism 20 can be used as a mechanical structure in the camera module 11 to adjust the attitude of the optical mechanism 111, such as a visible light lens or an infrared thermal imager. In still other embodiments, the electronic device 10 can also be a gimbal camera. In this case, the image stabilization mechanism 20 can be an image stabilization gimbal in the electronic device 10, the optical mechanism 111 can be a camera module, and the image stabilization mechanism 20 is used to drive the camera module to move in order to achieve optical image stabilization. The image stabilization mechanism 20 can also be used to drive the movement of any other applicable components in the camera module 11 that require optical image stabilization through rotational movement, which is not limited in this application.

[0065] Please see Figure 9 , Figure 9 A schematic diagram of the structure of a piezoelectric actuator 22 according to some embodiments of this application is shown. In some embodiments, the piezoelectric actuator 22 includes a piezoelectric body 221 and a friction head 222. The piezoelectric body 221 includes an elastic base 2211 and a piezoelectric layer 2212. The piezoelectric layer 2212 is disposed on at least two orthogonal sides of the elastic base 2211 (illustrated as two orthogonal sides of the elastic base 2211 in the figure). Each piezoelectric layer 2212 has a plurality of first electrodes (not shown in the figure) on the side surface away from the elastic base 2211. The friction head 222 is disposed on one side surface of the elastic base 2211 or on the first electrodes of the piezoelectric layer 2212. Under the action of different driving voltages, each first electrode can excite the piezoelectric actuator 22 to generate different orthogonal vibration modes, so that the friction head 222 supports the generation of displacement components along two orthogonal directions on different preset planes, for example, the generation of displacement components along two orthogonal directions on a first plane.

[0066] The piezoelectric layer 2212 is disposed on at least two orthogonal sides of the elastic base 2211. Each piezoelectric layer 2212 has a plurality of first electrodes on its surface away from the elastic base 2211. Each first electrode is used to apply a driving voltage, and the driving voltage applied to different first electrodes can be the same or different. Optionally, a driving circuit can apply a driving voltage to each first electrode according to configured driving parameters.

[0067] It is understood that the plurality of first electrodes in this embodiment includes one or more. Optionally, the surface of the piezoelectric layer 2212 away from the elastic base 2211 can be divided into a plurality of first electrode partitions as needed, and each first electrode partition is provided with a first electrode. Each first electrode can be used to achieve polarization and can also be used as a working electrode when a voltage is applied. When a driving voltage is applied to the piezoelectric layer 2212 via the first electrode, the piezoelectric material will undergo deformations such as stretching, bending, etc., thereby driving the friction head 222 to form a displacement component. Optionally, the first electrodes on the surface of each piezoelectric layer 2212 can be prepared by magnetron sputtering or screen printing. Optionally, the plurality of first electrodes on the piezoelectric layer 2212 completely cover the surface of the piezoelectric layer 2212, so that the piezoelectric layer 2212 can be completely polarized. The polarization method has a high overall utilization rate of the piezoelectric material, which is beneficial to enhance the deformation effect of the piezoelectric material and further enhance the thrust of the friction head 222.

[0068] Optionally, the piezoelectric layer 2212 can be prepared using piezoelectric ceramics, piezoelectric single crystals, or textured ceramics. To reduce the driving voltage, multilayer co-fired ceramics can also be prepared using tape casting technology. Further optionally, the piezoelectric ceramics and textured ceramics can be made of lead-containing components such as lead zirconate titanate (PZT)-based, lead magnesium niobate-lead titanate (PMN-PT)-based, and lead indium niobate-lead magnesium niobate-lead titanate (PIN-PMN-PT)-based, or lead-free components such as barium titanate (BT)-based, sodium bismuth titanate (BNT)-based, potassium sodium niobate (KNN)-based, and barium calcium zirconate titanate (BCZT)-based. Alternatively, the piezoelectric single crystal may be made of lead-containing components such as lead zinc niobate-lead titanate (PZN-PT), lead magnesium niobate-lead titanate (PMN-PT), lead indium niobate-lead zinc niobate-lead titanate (PIN-PZN-PT), lead indium niobate-lead magnesium niobate-lead titanate (PIN-PMN-PT), or lead-free components such as sodium bismuth titanate (BNT), sodium bismuth titanate-potassium bismuth titanate (BNT-BKT), and sodium potassium bismuth titanate (KNN).

[0069] The elastic base 2211 can be used to support each piezoelectric layer 2212. Specifically, piezoelectric layers 2212 are provided on at least two intersecting sides of the elastic base 2211. When the piezoelectric layers 2212 generate vibration modes, the elastic base 2211 can undergo elastic deformation due to its elasticity. When a voltage is applied to each of the first electrodes, a second electrode can be led out from the elastic base 2211. The second electrode is electrically connected to the surface of each piezoelectric layer 2212 near the elastic base 2211 for grounding.

[0070] Optionally, the elastic base 2211 can be made of non-conductive materials such as plastic or glass, or it can be made of conductive materials such as metal or metal oxide. When the elastic base 2211 is made of a conductive material, it can be directly used as a second electrode for grounding. When the elastic base 2211 is made of a non-conductive material, the second electrode can be provided on the end face of the elastic base 2211, or the center of the elastic base 2211 can have a partially hollowed-out structure to house the second electrode. The hollowed-out shape can be cylindrical, cuboid, cube, etc., to facilitate modal excitation or the lead-out of the second electrode.

[0071] The friction head 222 is disposed on one side of the elastic base 2211. Optionally, it can be disposed on the first electrode of the piezoelectric layer 2212 on one side of the elastic base 2211, or it can be directly disposed on one side of the elastic base 2211 (i.e., the position on the elastic base 2211 where the piezoelectric layer 2212 is not disposed). The friction head 222 can be used to generate displacement components along two orthogonal directions along a preset plane, i.e., micro-amplitude vibration, when the piezoelectric actuator 22 simultaneously generates vibration modes with mutually orthogonal displacement directions, thereby generating an elliptical trajectory moving along the preset plane. When different driving voltages and driving methods are adjusted, the friction head 222 can generate displacement components along two orthogonal directions on different preset planes, generating macroscopic linear or rotational motion on the preset plane through the action of friction, thereby driving the contacting optical mechanism 111 to move.

[0072] Optionally, the friction head 222 can be designed in regular shapes such as square, cylindrical, semi-cylindrical, spherical, hemispherical, or triangular pyramid, or it can be designed in other irregular shapes. The material of the friction head 222 can be single crystal or polycrystalline materials such as alumina (Al2O3), silicon oxide (SiO2) or zirconium oxide (ZrO2), or wear-resistant materials such as carbon fiber, polyester fiber, aluminum, iron, copper, or stainless steel, to prevent wear during long-term operation and maintain fitting accuracy.

[0073] The piezoelectric actuator 22 provided in this embodiment can generate different orthogonal vibration modes by adjusting different driving voltages applied to the first electrode, enabling the friction head 222 to generate displacement components along two orthogonal directions on different preset planes. Therefore, the piezoelectric actuator 22 in this embodiment has a simple structure; a single piezoelectric actuator 22 can drive the optical mechanism 111 to achieve two degrees of freedom motion, simplifying the design structure of a two-degree-of-freedom piezoelectric motor, reducing the overall thickness and volume of the piezoelectric motor, which is beneficial for miniaturization. It also improves the problem of limited motion stroke. Furthermore, through vibration driving, nanometer-level displacement accuracy can be achieved, realizing high-precision displacement control.

[0074] In one embodiment, please refer toFigure 10 Under different driving voltages, the piezoelectric actuator 22 supports a first-order extensional vibration mode, a first-order second-order bending vibration mode, and a second-order second-order bending vibration mode. The first-order extensional vibration mode is coupled with the first-order second-order bending vibration mode, causing the friction head 222 to generate an elliptical trajectory along a first preset plane. The first-order second-order bending vibration mode is coupled with the second-order second-order bending vibration mode, causing the friction head 222 to generate an elliptical trajectory along a second preset plane. The first preset plane and the second preset plane are perpendicular to each other.

[0075] By adjusting different driving voltages and driving methods, the piezoelectric actuator 22 can support first-order stretching vibration mode, first and second-order bending vibration mode, and second and second-order bending vibration mode. For example... Figure 10 As shown, a first-order stretching vibration mode can be understood, for example, as a stretching vibration mode along the X-axis (L in the figure). 1,X Vibration modes), the first and second order bending vibration modes can be understood, for example, as bending vibration modes along the Z-axis (B 2,Z Vibration modes), the second-order bending vibration mode can be understood, for example, as the bending vibration mode along the Y-axis (B 2,Y Vibration modes). For example... Figure 10 As shown, L 1,X Vibration modes and B 2,Z Vibration mode coupling causes the friction head 222 to generate an elliptical trajectory along a first preset plane (the XOZ plane in the figure); B 2,Y Vibration modes and B 2,Z Vibration mode coupling causes the friction head 222 to generate an elliptical trajectory along the second preset plane (YOZ plane in the figure). The movement of the friction head 222 on the first preset plane and the second preset plane can realize the displacement of the friction head 222 in two orthogonal directions on the first plane.

[0076] It is understandable that the first plane is... Figure 10 The XOY plane shown Figure 10 The Z-axis direction shown is perpendicular to the first plane. The friction head 222 generates elliptical motion on the XOZ or YOZ plane. The motion trajectory of the friction head 222 can be regarded as a circular or elliptical trajectory including displacement components in the direction perpendicular to the first plane and in the direction parallel to the first plane. The friction head 222 generates displacement components in the direction perpendicular to the first plane, which can more effectively drive the rotation output element 23 to move.

[0077] When there are two friction heads 222, the two friction heads 222 will alternately contact the contact surface 233 within one vibration cycle, thereby driving the rotation output element 23 to move alternately through friction.

[0078] Optionally, the resonant frequency of the first-order stretching vibration mode is equal to the resonant frequencies of the first-order bending vibration mode and the second-order bending vibration mode, respectively. It is understood that the equality in this embodiment is not strictly equal. Within an acceptable range, when the resonant frequency of the first-order stretching vibration mode is infinitely close to the resonant frequencies of the first-order bending vibration mode and the second-order bending vibration mode, this embodiment also considers it to be within the range of equality. When the resonant frequency of the first-order stretching vibration mode differs from the resonant frequencies of the first-order bending vibration mode and the second-order bending vibration mode due to limitations such as material and manufacturing process, as long as the friction head 222 can achieve elliptical motion in the corresponding plane through the corresponding vibration mode to achieve the corresponding driving function, the difference in resonant frequency can be considered to be within an acceptable range and can also be considered to be within the scope of equality in this application. Therefore, when the resonant frequencies are nearly equal, by applying different driving voltages to different electrodes, the piezoelectric actuator 22 can simultaneously excite mutually orthogonal first-order stretching vibration mode and second-order bending vibration mode, or mutually orthogonal first-order bending vibration mode and second-order bending vibration mode. Optionally, the dimensions of the piezoelectric actuator 22 can be optimized by finite element simulation so that the vibration frequencies of its first-order stretching vibration mode and second-order bending vibration mode are infinitely close.

[0079] It is understood that in terms of modal excitation, this embodiment uses the coupling between the first-order stretching vibration mode and the second-order bending vibration mode. In actual operation, it is not necessary to strictly select these two modes. As long as the elliptical motion of the friction head 222 can be excited, any combination of two or more modes is acceptable.

[0080] In one embodiment, the polarization direction of each piezoelectric layer 2212 is parallel to the thickness direction of each piezoelectric layer 2212, and the polarization directions of the two piezoelectric layers 2212 on the two orthogonal sides are orthogonal.

[0081] In this embodiment, each piezoelectric layer 2212 adopts a thickness-direction polarization method. The piezoelectric material of each piezoelectric layer 2212 is polarized in a direction parallel to the thickness of each layer, such that the polarization directions of two piezoelectric layers 2212 on two orthogonal sides are orthogonal. This allows different piezoelectric layers 2212 to be excited to generate different orthogonal vibration modes when a driving voltage is applied through the first electrode. Optionally, the polarization directions of two piezoelectric layers 2212 on two parallel sides can be the same or opposite; this embodiment does not specifically limit this.

[0082] It should be noted that the polarization direction of each piezoelectric layer 2212 is not limited to the thickness direction. In other embodiments, the polarization direction of each piezoelectric layer 2212 can also be parallel to the width direction of each piezoelectric layer 2212. It can be understood that, based on the different polarization directions, the directions of the first vibration mode and the second vibration mode generated by the piezoelectric actuator 22 are also different.

[0083] In one embodiment, such as Figure 11 As shown, the elastic base 2211 has four sides, any two adjacent sides are orthogonal, and each side is provided with a piezoelectric layer 2212. Each piezoelectric layer 2212 is provided with a plurality of spaced-apart first electrodes. Figure 11 The illustration is based on an example where each side has two first electrodes (the specific first electrodes are not shown; the gaps represent the intervals between them). Each piezoelectric layer 2212 on each side can generate vibration modes through a driving voltage applied to the first electrodes. On one hand, more identical or different vibration modes can be excited through more first electrodes, achieving macroscopic motion output. On the other hand, it makes the overall vibration modes of the piezoelectric actuator 22 more uniform, enhancing its overall driving capability. Thus, the piezoelectric actuator 22 can achieve high-thrust drive while maintaining miniaturization and high precision.

[0084] Optionally, the piezoelectric layers 2212 on parallel sides can have the same shape and size to achieve symmetrical arrangement between the parallel piezoelectric layers 2212; the first electrodes of the piezoelectric layers 2212 on parallel sides can also have the same shape and size to achieve symmetrical arrangement of the first electrodes between the parallel piezoelectric layers 2212. It is understood that the piezoelectric layers 2212 on orthogonal sides can have the same or different shapes and sizes, and the first electrodes of the piezoelectric layers 2212 on orthogonal sides can also have the same or different shapes and sizes; this embodiment does not further limit this. It is understood that the number of first electrodes on each side of the piezoelectric layer 2212 is not limited; to further improve the uniformity of the vibration modes, an even number of first electrodes can be provided on each side of the piezoelectric layer 2212.

[0085] In one embodiment, two friction heads 222 are provided, each disposed on a different first electrode on the same side. The two friction heads 222 are used to alternately contact the contact surface 233 within one vibration cycle. Thus, the two friction heads 222 can alternately drive the optical mechanism 111 to move within one vibration cycle, which helps reduce power consumption and improves the ability of the piezoelectric actuator 22 to drive the sliding component. Optionally, the vibration trajectories of the two friction heads 222 are 180° out of phase, and are driven alternately and in the same direction twice within one vibration cycle, which helps to further achieve high driving speed, high driving force, and high power density of the piezoelectric actuator 22.

[0086] In one embodiment, the extension direction of each side is perpendicular to the thickness direction of the elastic base 2211; two friction heads 222 are arranged along the extension direction. Thus, the friction heads 222 are located on one side of the length of the piezoelectric actuator 22, thereby greatly reducing the thickness of the piezoelectric actuator 22, enabling miniaturized integration and saving device space.

[0087] In one embodiment, such as Figure 12 As shown, at least two sides each have multiple layers of stacked piezoelectric layers 2212, and each piezoelectric layer 2212 has a plurality of first electrodes (not shown in the figure) on the surface away from the elastic base 2211. Thus, more layers of piezoelectric layers 2212 can be driven by their respective first electrodes. By controlling the driving voltage of more piezoelectric layers 2212, higher precision control can be achieved, matching more vibration modes and simultaneously achieving greater thrust. Optionally, the internal electrodes of each piezoelectric layer 2212 can be divided into multiple regions by an interdigitated electrode design, and a plurality of first electrodes can be provided on the surface away from the elastic base 2211 corresponding to the divided regions of the piezoelectric layer 2212. It is understood that the multilayer stacked piezoelectric layers 2212 are still relatively smaller than the stacked design of the dual piezoelectric actuator 22 with double-layer guide rails, thus still achieving miniaturization. It is understood that the number of stacked layers can be adjusted according to actual driving requirements and overall size requirements; this embodiment does not further limit this. It is understood that when there are multiple first electrodes on the same piezoelectric layer 2212, the multiple first electrodes are spaced apart. At this time, when forming the first electrode on the same piezoelectric layer 2212, multiple first electrodes can be formed directly by electroplating, or multiple first electrodes can be formed by cutting after forming one electrode. The spacing between the corresponding first electrodes on the same piezoelectric layer 2212 can be flush with other positions, or grooves can be formed.

[0088] In one embodiment, the plurality of first electrodes are divided into at least two groups, each group including at least two first electrodes. The first electrodes in the same group are connected to the same AC voltage, and the AC voltages connected to the first electrodes in different groups are 90° or 270° out of phase. The second electrode of the piezoelectric layer 2212 for grounding is led out through the elastic base 2211.

[0089] The multiple first electrodes are divided into at least two groups, meaning that all the first electrodes of the entire piezoelectric actuator 22 can be divided into at least two driving groups to apply different driving voltages. Each group includes at least two first electrodes, which can come from the same side of the piezoelectric layer 2212 or from different piezoelectric layers 2212. The second electrode for grounding the piezoelectric layer 2212 can be led out through the elastic base 2211 in the following ways: the second electrode is directly disposed on the end face of the elastic base 2211, serving as both the grounding electrode of the piezoelectric layer 2212 and the lead-out electrode of the grounding electrode, and the second electrode is at least partially in contact with the piezoelectric layer 2212; or the second electrode is disposed between the elastic base 2211 and the piezoelectric layer 2212, and then led out to ground through the lead-out electrode disposed on the end face of the elastic base 2211. The first electrode, the second electrode, and the lead-out electrode can all be metal sheets or conductive layers such as conductive silver paste. The piezoelectric layer 2212 is connected to the ground voltage on the side near the elastic base 2211. The polarization direction of each piezoelectric layer 2212 points from the side of the piezoelectric layer 2212 near the elastic base 2211 to the side away from the elastic base 2211, and a voltage difference is formed on different sides of each piezoelectric layer 2212.

[0090] Each piezoelectric layer 2212 is excited to generate vibration modes by AC voltages with a phase difference of 90°, 180° or 270° applied through different groups of first electrodes. The piezoelectric material of the piezoelectric layer 2212 is displaced along the polarization direction due to the inverse piezoelectric effect of the piezoelectric mode, so that the orthogonal vibration modes of the piezoelectric layer 2212 are excited simultaneously under the action of the electric field. Since there is a phase difference in the applied voltage, the displacement components that are perpendicular to each other along the preset plane generated by the friction head 222 will couple to form a micro elliptical motion.

[0091] refer to Figure 13 , Figure 13 This is a schematic diagram of the structure of an electronic device 10 provided in an embodiment of this application. The electronic device 10 may include a radio frequency (RF) circuit 501, a memory 502 including one or more computer-readable storage media, an input unit 503, a display unit 504, a sensor 505, an audio circuit 506, a wireless Fidelity (WiFi) module 507, a processor 508 including one or more processing cores, and a power supply 509, among other components. Those skilled in the art will understand that... Figure 13 The structure of the electronic device 10 shown does not constitute a limitation on the electronic device 10. It may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0092] The radio frequency (RF) circuit 501 can be used to send and receive information, or to receive and send signals during a call. Specifically, it receives downlink information from the base station and hands it over to one or more processors 508 for processing; additionally, it sends uplink data to the base station. Typically, the RF circuit 501 includes, but is not limited to, an antenna, at least one amplifier, a tuner, one or more oscillators, a Subscriber Identity Module (SIM) card, a transceiver, a coupler, a low-noise amplifier (LNA), a duplexer, etc. Furthermore, the RF circuit 501 can also communicate wirelessly with networks and other devices. This wireless communication can use any communication standard or protocol, including but not limited to GSM, GPRS, CDMA, WCDMA, LTE, email, and SMS.

[0093] Memory 502 can be used to store applications and data. The applications stored in memory 502 contain executable code. Applications can be composed of various functional modules. Processor 508 executes various functional applications and data processing by running the applications stored in memory 502. Memory 502 may primarily include a program storage area and a data storage area. The program storage area may store the operating system, applications required for at least one function (such as sound playback, image playback, etc.), etc.; the data storage area may store data created based on the use of electronic device 10 (such as audio data, phonebook, etc.). Furthermore, memory 502 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, memory 502 may also include a memory controller to provide access to memory 502 for processor 508 and input unit 503.

[0094] Input unit 503 can 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. Specifically, in one embodiment, input unit 503 may include a touch-sensitive surface and other input devices. The touch-sensitive surface, also known as a touch display or touchpad, can collect user touch operations on or near it (such as user operations using fingers, styluses, or any suitable object or accessory on or near the touch-sensitive surface) and drive corresponding connection devices according to a pre-set program. Optionally, the touch-sensitive surface may include a touch detection device and a touch controller. The touch detection device detects the user's touch orientation and the signal generated by the touch operation, transmitting the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into touch point coordinates, sends it to the processor 508, and can receive and execute commands from the processor 508.

[0095] Display unit 504 can be used to display information input by the user or information provided to the user, as well as various graphical user interfaces of electronic device 10. These graphical user interfaces can be composed of graphics, text, icons, video, and any combination thereof. Display unit 504 may include a display panel. Optionally, the display panel can be configured in the form of a liquid crystal display (LCD), organic light-emitting diode (OLED), etc. Further, a touch-sensitive surface can cover the display panel. When the touch-sensitive surface detects a touch operation on or near it, it transmits the information to processor 508 to determine the type of touch event. Subsequently, processor 508 provides corresponding visual output on the display panel according to the type of touch event. Although in Figure 13 In this context, the touch-sensitive surface and the display panel are two separate components for implementing input and output functions. However, in some embodiments, the touch-sensitive surface and the display panel can be integrated to achieve both input and output functions.

[0096] The electronic device 10 may also include at least one sensor 505, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor. The ambient light sensor can adjust the brightness of the display panel according to the ambient light level, and the proximity sensor can turn off the display panel and / or backlight when the electronic device 10 is moved to the ear. As a type of motion sensor, a gravity acceleration sensor can detect the magnitude of acceleration in various directions (generally three axes). When stationary, it can detect the magnitude and direction of gravity and can be used for applications that recognize the phone's posture (such as landscape / portrait switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc. Other sensors that may be configured in the electronic device 10, such as gyroscopes, barometers, hygrometers, thermometers, and infrared sensors, will not be described in detail here.

[0097] Audio circuit 506 provides an audio interface between the user and electronic device 10 via a speaker and microphone. Audio circuit 506 converts received audio data into electrical signals, transmits them to the speaker, and the speaker outputs them as sound signals. Conversely, the microphone converts collected sound signals into electrical signals, which are then received by audio circuit 506, converted back into audio data, and processed by processor 508. The audio data is then transmitted via radio frequency circuit 501 to, for example, another electronic device 10, or output to memory 502 for further processing. Audio circuit 506 may also include a headphone jack to facilitate communication between peripheral headphones and electronic device 10.

[0098] WiFi (Wireless Fidelity) is a short-range wireless transmission technology. Electronic device 10, through WiFi module 507, can help users send and receive emails, browse web pages, and access streaming media, providing users with wireless broadband internet access. Although Figure 13 The wireless fidelity module 507 is shown, but it is understood that it is not a necessary component of the electronic device 10 and can be omitted as needed without changing the nature of the invention.

[0099] The processor 508 is the control center of the electronic device 10. It connects various parts of the electronic device 10 via various interfaces and lines. By running or executing applications stored in the memory 502 and calling data stored in the memory 502, it performs various functions and processes data of the electronic device 10, thereby providing 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 and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 508.

[0100] The electronic device 10 also includes a power supply 509 that supplies power to the various components. Preferably, the power supply 509 can be logically connected to the processor 508 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 509 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0101] although Figure 13 As not shown in the diagram, the electronic device 10 may also include a Bluetooth module, etc., which will not be described in detail here. In specific implementation, the above modules can be implemented as independent entities, or they can be arbitrarily combined and implemented as the same or several entities. For the specific implementation of the above modules, please refer to the previous method embodiments, which will not be described in detail here.

[0102] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0103] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A stabilization mechanism, characterized in that, include: Base; A piezoelectric actuator, disposed on the base, includes a piezoelectric body and a friction head disposed on the piezoelectric body; and, The rotating output element has a contact surface, which is spherical and contacts the friction head. The piezoelectric actuator is configured such that the friction head can generate displacement components in two orthogonal directions under the deformation of the piezoelectric body, thereby driving the rotation output element to rotate around the center of the contact surface.

2. The image stabilization mechanism according to claim 1, characterized in that, The friction head is capable of generating displacement components along two orthogonal directions on a first plane, the first plane being parallel to the tangent plane of the contact position between the contact surface and the friction head, and perpendicular to the radial direction of the contact position between the contact surface and the friction head.

3. The image stabilization mechanism according to claim 1, characterized in that, The base is provided with a rolling surface, which is spherical and opposite to the contact surface. The anti-shake mechanism also includes a rolling element, which is disposed between the rolling surface and the contact surface and rolls in cooperation with the rolling surface and the contact surface.

4. The image stabilization mechanism according to claim 3, characterized in that, The anti-shake mechanism also includes a limiting wall, which is connected to the base and arranged around the rolling element and the rolling surface, and the limiting wall is spaced apart from the contact surface.

5. The image stabilization mechanism according to claim 3, characterized in that, The friction head is capable of generating displacement components in two orthogonal directions on a first plane. The central axis of the piezoelectric actuator is perpendicular to the first plane and passes through the center of the ball of the contact surface. The central axis of the rolling surface passes through the center of the ball of the contact surface. The central axis of the piezoelectric actuator and the central axis of the rolling surface are coplanar; and / or, The friction head can also generate a displacement component in a direction perpendicular to the first plane, and the motion trajectory of the friction head is a circular or elliptical trajectory that includes displacement components in both directions perpendicular to and parallel to the first plane.

6. The image stabilization mechanism according to claim 3, characterized in that, The rolling surface and the piezoelectric actuator are located on opposite sides of the rotating output element, and the central axis of the piezoelectric actuator passes through the rolling surface.

7. The image stabilization mechanism according to claim 1, characterized in that, The anti-shake mechanism also includes an elastic preload member, which is disposed on the base and located between the piezoelectric actuator and the base. The elastic preload member is used to apply an elastic force to the piezoelectric actuator in the direction of the contact surface.

8. The image stabilization mechanism according to claim 1, characterized in that, The rotating output element includes a rotating output body and a magnetic structure. The magnetic structure is disposed on the rotating output body. The anti-shake mechanism also includes a magnetic suction component, which is disposed on the base and magnetically engages with the magnetic structure. Alternatively, the anti-shake mechanism may further include a magnetic attractor disposed on the rotating output body and a magnetic structure disposed on the base, wherein the magnetic attractor and the magnetic structure are magnetically attracted to each other.

9. The image stabilization mechanism according to claim 8, characterized in that, When the rotating output element includes a magnetic structure, at least a portion of the surface of the rotating output body is a sphere, the surface of the magnetic structure facing the rotating output body is a sphere adapted to the surface of the rotating output body and connected to the surface of the rotating output body, and the surface of the magnetic structure facing away from the rotating output body forms the contact surface.

10. The image stabilization mechanism according to claim 1, characterized in that, The rotating output element includes a rotating output body and a friction structure. The friction structure is disposed on the rotating output body, and the surface of the friction structure facing away from the rotating output body forms the contact surface.

11. The image stabilization mechanism according to claim 10, characterized in that, The anti-shake mechanism further includes a magnetic suction component, which is disposed on the base. The rotating output element further includes a magnetic structure, which magnetically engages with the magnetic suction component. The magnetic structure is disposed on the friction structure or on the rotating output body.

12. The image stabilization mechanism according to any one of claims 8, 9, and 11, characterized in that, The base is provided with a rolling surface, which is spherical and opposite to the contact surface. The anti-shake mechanism also includes a rolling element, which is disposed between the rolling surface and the contact surface and rolls in cooperation with the rolling surface and the contact surface. The central axis of the piezoelectric actuator intersects the central axis of the rolling surface, and the magnetic attractor is located between the central axis of the piezoelectric actuator and the central axis of the rolling surface on the same plane.

13. The image stabilization mechanism according to claim 12, characterized in that, The base includes a first wall, a second wall, a third wall, and a fourth wall. The first wall and the second wall intersect and are connected. The rolling surface is formed on the side of the first wall facing the rotating output element. The piezoelectric actuator is disposed on the second wall. The third wall and the fourth wall are both connected to the first wall and the second wall and are located on opposite sides of the rotating output element. The base also has an inclined surface located between the first wall and the second wall. The inclined surface is inclined to the surfaces of the first wall and the second wall facing the rotating output element. The magnetic suction element is disposed on the inclined surface.

14. A camera module, characterized in that, It includes an optical mechanism and a stabilization mechanism as described in any one of claims 1-13, wherein the optical mechanism is connected to the rotational output element of the stabilization mechanism.

15. The camera module according to claim 14, characterized in that, The optical mechanism is a prism, which includes an incident light surface, an exit light surface, and a reflecting surface that intersect each other. The reflecting surface is connected to the side of the rotating output element that faces away from the contact surface.

16. An electronic device, characterized in that, Includes the camera module as described in claim 14 or 15.

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