Anti-shake driving assembly and camera module

Abstract

Disclosed are an anti-shake driving assembly and a camera module, wherein the anti-shake driving assembly comprises an anti-shake fixed part with a receiving cavity, an anti-shake movable part suspendedly arranged in the receiving cavity of the anti-shake fixed part, and an anti-shake driving part arranged at the lower part of the receiving cavity, the anti-shake driving part being suitable for driving the anti-shake movable part to move in an XOY plane set by X and Y axes or to rotate in the XOY plane around a Z axis perpendicular to the X and Y axes. In particular, the anti-shake driving assembly further comprises a guide device arranged in the receiving cavity and used for guiding the anti-shake movable part to move, wherein a guide element of the guide device is clamped in the receiving cavity to generate a pre-pressing force for forcing the anti-shake driving part to be frictionally coupled to the anti-shake movable part, that is, the guide element plays a role of a pre-pressing device in addition to the role of guiding the anti-shake movable part to move.

Description

Technical Field

[0001] This application relates to the field of camera modules, and more particularly to a stabilization drive component and a camera module. Background Technology

[0002] With the popularization of mobile electronic devices, the technology of camera modules used in mobile electronic devices to help users acquire images (such as videos or pictures) has developed and progressed rapidly. In recent years, camera modules have been widely used in many fields such as medical care, security, and industrial production.

[0003] To meet increasingly diverse market demands, high pixel counts, large sensor sizes, and small dimensions are an irreversible development trend for existing camera modules. As image sensors evolve towards higher pixel counts and larger sensor sizes, the size of optical components (e.g., filters, lenses) that are compatible with the image sensors is also gradually increasing. This presents new challenges to the driving elements used to drive these optical components for adjusting optical performance (e.g., optical autofocus, optical image stabilization).

[0004] Specifically, existing driving elements for optical components are electromagnetic motors, such as voice coil motors (VCMs) and shape memory alloy actuators (SMAs). However, with the increasing size and weight of optical components, existing electromagnetic motors are gradually becoming unable to provide sufficient driving force to move them. Quantitatively speaking, existing voice coil motors and shape memory alloy actuators are only suitable for driving optical components weighing less than 100mg. That is, if the weight of the optical component exceeds 100mg, existing actuators will not meet the application requirements of camera modules.

[0005] Furthermore, as mobile terminal devices become smaller and thinner, the density of components inside the drive elements also increases. Correspondingly, existing voice coil motors contain coils and magnets. When the two magnets are too close (less than 7mm), their internal magnetic fields interact, causing magnet displacement or vibration, reducing the stability of the drive control.

[0006] Therefore, a new driving solution is needed for camera modules. The new driver can not only meet the driving requirements of camera modules for adjusting optical performance, but also meet the development needs of camera modules for lightweighting and thinning. Summary of the Invention

[0007] One advantage of this application is that it provides a stabilization drive component and a camera module, wherein the camera module uses a novel piezoelectric actuator as a drive element to not only provide a sufficiently large driving force, but also to provide higher precision and longer stroke driving performance to meet the optical performance adjustment requirements of the camera module, such as the requirements for optical image stabilization.

[0008] Another advantage of this application is that it provides a stabilization drive component and a camera module, wherein the piezoelectric actuator is arranged in the camera module using a reasonable layout scheme to meet the structural and size requirements of the camera module.

[0009] Another advantage of this application is that it provides a stabilization drive component and a camera module, wherein the stabilization drive component is configured with only one stabilization movable part to realize the stabilization of the camera module in the XOY plane, that is, the stabilization drive component has a relatively simplified drive configuration.

[0010] Another advantage of this application is that it provides a stabilization drive assembly and a camera module, wherein the guide device and the stabilization drive part of the stabilization drive assembly are disposed opposite to each other on both sides of the stabilization movable part, and the guide device, the stabilization movable part and the stabilization drive part are clamped and disposed in the receiving cavity formed by the stabilization fixing part. In this way, the guide element of the guide device, in addition to guiding the movement of the stabilization movable part, also provides pre-pressure to keep the stabilization drive part frictionally coupled to the stabilization movable part.

[0011] Other advantages and features of this application will become apparent from the following description and can be realized by means and combinations particularly pointed out in the claims.

[0012] To achieve at least one of the above advantages, this application provides a stabilization drive component, which includes:

[0013] A shock-absorbing fixing part with a receiving cavity;

[0014] A movable anti-shake component is suspended within the receiving cavity of the anti-shake fixing part, thereby dividing the receiving cavity into an upper part and a lower part, wherein the movable anti-shake component is adapted to mount a photosensitive component thereon;

[0015] A stabilization drive unit is disposed in the lower part of the receiving cavity, wherein the stabilization drive unit includes a first piezoelectric actuator and a second piezoelectric actuator frictionally coupled to the stabilization movable part, the first piezoelectric actuator and the second piezoelectric actuator being adapted to actuate the stabilization movable part to move in the XOY plane defined by the X-axis and Y-axis or to rotate in the XOY plane about a Z-axis perpendicular to the X-axis and Y-axis; and

[0016] A guide element is clamped and disposed on the upper part of the receiving cavity, wherein the clamped guide element generates a pre-pressure that forces the anti-shake movable part to abut against the first piezoelectric actuator and the second piezoelectric actuator, thereby causing the first piezoelectric actuator and the second piezoelectric actuator to be frictionally coupled to the anti-shake movable part by the pre-pressure.

[0017] In the anti-shake drive assembly according to this application, the anti-shake fixing part includes a base and an upper cover that engages with the base, the upper part of the receiving cavity is formed between the upper cover and the anti-shake movable part, and the lower part of the receiving cavity is formed between the base and the anti-shake movable part.

[0018] In the anti-shake drive assembly according to this application, there is a gap between the anti-shake movable part and the base, and a gap between the anti-shake movable part and the top cover, in such a way that the anti-shake movable part is suspended in the receiving cavity of the anti-shake fixing part.

[0019] In the anti-shake drive assembly according to this application, the anti-shake movable part is smoothly clamped between the first piezoelectric actuator and the guide element, and between the second piezoelectric actuator and the guide element.

[0020] In the anti-shake drive assembly according to this application, the anti-shake movable part includes a carrier body and a carrier extension arm extending outward from the carrier body, wherein the guide element is clamped between the lower surface of the upper cover and the upper surface of the carrier extension arm, and the first piezoelectric actuator and the second piezoelectric actuator are frictionally coupled to the lower surface of the carrier extension arm.

[0021] In the anti-shake drive assembly according to this application, the anti-shake movable part further includes a friction plate formed on the lower surface of the carrier extension arm, and the first piezoelectric actuator and the second piezoelectric actuator are frictionally coupled to the friction plate.

[0022] In the image stabilization drive assembly according to this application, the image stabilization drive assembly further includes a first guide groove recessed in the upper surface of the carrier extension arm, the guide element being received in the first guide groove, the guide element and the first guide groove forming a guide device for guiding the image stabilization movable part and the photosensitive assembly to move, wherein at least a portion of the guide element protrudes from the groove and abuts against the lower surface of the upper cover, in such a way that the guide element is clamped between the lower surface of the upper cover and the upper surface of the carrier extension arm.

[0023] In the anti-shake drive assembly according to this application, the guiding element is a ball bearing.

[0024] In the anti-shake drive assembly according to this application, the guiding element is a slider.

[0025] In the anti-shake drive assembly according to this application, the first guide groove extends along the direction set by the X-axis, and the guide device further includes a second guide groove recessed in the lower surface of the upper cover, the second guide groove extending along the direction set by the Y-axis.

[0026] In the anti-shake drive assembly according to this application, the first guide groove extends along the direction set by the Y-axis, and the guide device further includes a second guide groove recessed in the lower surface of the upper cover, the second guide groove extending along the direction set by the X-axis.

[0027] In the anti-shake drive assembly according to this application, the first guide segment and the second guide groove are arranged opposite to each other and intersect each other.

[0028] In the anti-shake drive assembly according to this application, the first piezoelectric actuator and the second piezoelectric actuator have the same height dimension.

[0029] In the anti-shake drive assembly according to this application, the height dimensions of the first piezoelectric actuator and the second piezoelectric actuator are 0.7mm-0.9mm.

[0030] In the anti-shake drive assembly according to this application, the first piezoelectric actuator and the second piezoelectric actuator are traveling wave piezoelectric actuators. The first piezoelectric actuator includes a first piezoelectric ceramic plate and a first friction drive portion protruding from the first piezoelectric ceramic plate. The first piezoelectric ceramic plate is adapted to deform after being electrically driven to drive the first friction drive portion to perform a unidirectional yaw reciprocating motion. The second piezoelectric actuator includes a second piezoelectric ceramic plate and a second friction drive portion protruding from the second piezoelectric ceramic plate. The second piezoelectric ceramic plate is adapted to deform after being electrically driven to drive the second friction drive portion to perform a unidirectional yaw reciprocating motion.

[0031] In the anti-shake drive assembly according to this application, the first piezoelectric ceramic plate is disposed on the anti-shake fixed part, the first friction drive part is frictionally coupled to the anti-shake movable part, the second piezoelectric ceramic plate is disposed on the anti-shake fixed part, and the second friction drive part is frictionally coupled to the anti-shake movable part.

[0032] In the image stabilization drive assembly according to this application, the first piezoelectric actuator and the second piezoelectric actuator are arranged parallel to each other on opposite sides of the photosensitive assembly.

[0033] In the image stabilization drive assembly according to this application, the first piezoelectric actuator and the second piezoelectric actuator are arranged symmetrically on opposite sides of the photosensitive assembly with respect to the photosensitive assembly about the X-axis or the Y-axis as the axis of symmetry.

[0034] In the image stabilization drive assembly according to this application, the first piezoelectric actuator is adapted to deform along the direction set by the X-axis to actuate the image stabilization movable part and the photosensitive component to move along the direction set by the X-axis, and the second piezoelectric actuator is adapted to deform along the direction set by the X-axis to actuate the image stabilization movable part and the photosensitive component to move along the direction set by the X-axis, so as to actuate the image stabilization movable part and the photosensitive component to move along the direction set by the X-axis by means of the first piezoelectric actuator and the second piezoelectric actuator;

[0035] The first piezoelectric actuator is adapted to deform along the direction set by the Y-axis to actuate the image stabilization movable part and the photosensitive component to move along the direction set by the Y-axis, and the second piezoelectric actuator is adapted to deform along the direction set by the Y-axis to actuate the image stabilization movable part and the photosensitive component to move along the direction set by the Y-axis, so that the image stabilization movable part and the photosensitive component are actuated along the direction set by the Y-axis by the first piezoelectric actuator and the second piezoelectric actuator;

[0036] The first piezoelectric actuator is adapted to deform along a first direction set by the X-axis to actuate the image stabilization movable part and the photosensitive component to move along the first direction set by the X-axis, and the second piezoelectric actuator is adapted to deform along a second direction set by the X-axis opposite to the first direction to actuate the image stabilization movable part and the photosensitive component to move along the second direction set by the X-axis, so that the photosensitive component is actuated to rotate about the Z-axis in the XOY plane by the first piezoelectric actuator and the second piezoelectric actuator;

[0037] The first piezoelectric actuator is adapted to deform along a first direction set by the Y-axis to actuate the image stabilization movable part and the photosensitive component to move along the first direction set by the Y-axis, and the second piezoelectric actuator is adapted to deform along a second direction set by the Y-axis opposite to the first direction to actuate the image stabilization movable part and the photosensitive component to move along the second direction set by the Y-axis, so that the photosensitive component is actuated to rotate about the Z-axis in the XOY plane by the first piezoelectric actuator and the second piezoelectric actuator.

[0038] In the image stabilization drive assembly according to this application, the image stabilization drive assembly further includes a drive substrate disposed between the image stabilization movable part and the substrate, the drive substrate including at least one conductive end and a connection end extending outward from the conductive end, the first piezoelectric actuator and the second piezoelectric actuator being electrically connected to the at least one electrical connection end.

[0039] In the anti-shake drive assembly according to this application, the at least one conductive terminal includes a first conductive terminal and a second conductive terminal, the first piezoelectric actuator is electrically connected to the first conductive terminal, and the second piezoelectric actuator is electrically connected to the second conductive terminal.

[0040] In the image stabilization drive assembly according to this application, the image stabilization movable part has a slot formed in the side wall of the carrier body, the slot being configured to allow the circuit board of the photosensitive component to extend out of the mounting slot from the slot.

[0041] In the anti-shake drive assembly according to this application, the substrate has an opening formed in its sidewall, wherein the at least one conductive end of the connection terminal extends outward and passes through the opening.

[0042] In the anti-shake drive assembly according to this application, the opening and the slot have a height difference.

[0043] In the anti-shake drive assembly according to this application, the anti-shake drive assembly further includes a pre-pressure device disposed between the anti-shake drive part and the anti-shake fixed part, so as to force the anti-shake drive part to be frictionally coupled to the anti-shake movable part by the pre-pressure provided by the pre-pressure device.

[0044] In the anti-shake drive assembly according to this application, the pre-pressure device includes a first elastic element disposed between the substrate and the first piezoelectric ceramic plate of the first piezoelectric actuator, so as to generate the pre-pressure by the elastic force of the first elastic element itself to force the first friction drive portion of the first piezoelectric actuator to abut against the friction plate, thereby making the first friction drive portion of the first piezoelectric actuator frictionally coupled to the friction plate; the pre-pressure device further includes a second elastic element disposed between the substrate and the second piezoelectric ceramic plate of the second piezoelectric actuator, so as to force the second friction drive portion of the second piezoelectric actuator to abut against the friction plate by the pre-pressure generated by the elastic force of the second elastic element itself, thereby making the second friction drive portion of the second piezoelectric actuator frictionally coupled to the friction plate.

[0045] In the image stabilization drive assembly according to this application, the thickness of the first elastic element and the second elastic element is 10µm to 50µm.

[0046] According to another aspect of this application, a camera module is also provided, comprising:

[0047] Optical lens;

[0048] A photosensitive assembly includes a circuit board and a photosensitive element electrically connected to the circuit board, wherein the optical lens is held in the photosensitive path of the photosensitive element; and

[0049] In the image stabilization drive assembly described above, the photosensitive component is mounted on the image stabilization movable part of the image stabilization drive assembly.

[0050] The further objectives and advantages of this application will become fully apparent from the following description and accompanying drawings.

[0051] These and other objects, features and advantages of this application are fully apparent from the following detailed description, the accompanying drawings and the claims. Attached Figure Description

[0052] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0053] Figure 1 The illustration shows a schematic diagram of a camera module according to an embodiment of this application.

[0054] Figure 2 The illustration shows a schematic diagram of a modified embodiment of the camera module according to an embodiment of this application.

[0055] Figure 3 The illustration shows a schematic diagram of another modified embodiment of the camera module according to an embodiment of this application.

[0056] Figure 4 The illustration shows a schematic diagram of the photosensitive component of the camera module according to an embodiment of this application.

[0057] Figure 5 An exploded perspective view of the image stabilization drive component of the camera module according to an embodiment of this application is shown.

[0058] Figure 6 The figure shows a perspective view of the anti-shake movable part in the anti-shake drive assembly according to an embodiment of the present application.

[0059] Figure 7 The figure shows an exploded perspective view of the anti-shake fixing part in the anti-shake drive assembly according to an embodiment of the present application.

[0060] Figure 8 The figure shows a schematic diagram of the anti-shake drive unit in the anti-shake drive assembly according to an embodiment of the present application.

[0061] Figure 9 The figure shows a schematic diagram of the piezoelectric actuator of the anti-shake drive unit according to an embodiment of the present application.

[0062] Figure 10 The figure shows a schematic diagram of the modified operation of the piezoelectric actuator according to an embodiment of the present application.

[0063] Figure 11 The figure shows a half-sectional schematic diagram of the anti-shake drive component according to an embodiment of the present application.

[0064] Figure 12 Another perspective view of the anti-shake drive component according to an embodiment of this application is shown.

[0065] Figure 13 The illustration shows yet another perspective view of the anti-shake drive component according to an embodiment of this application.

[0066] Figure 14 The illustration shows another half of the cross-sectional view of the anti-shake drive assembly according to an embodiment of this application.

[0067] Figure 15 The illustration shows a schematic diagram of a modified embodiment of the anti-shake drive unit according to an embodiment of this application.

[0068] Figure 16 The illustration shows a schematic diagram of another modified embodiment of the image stabilization drive unit according to an embodiment of this application. Detailed Implementation

[0069] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0070] Exemplary camera module

[0071] like Figures 1 to 16 As shown, a camera module according to an embodiment of this application is illustrated, which includes a photosensitive component 30, an optical lens 10 held on the photosensitive path of the photosensitive component 30, and a stabilization drive component 20 for driving the photosensitive component 30 to move in order to adjust the optical performance of the camera module.

[0072] In this embodiment, the photosensitive component 30 is installed within the image stabilization drive component 20, for example, as... Figures 1 to 16As shown, the image stabilization drive assembly 20 has a mounting groove 2110 located in its central region. The photosensitive component 30 is mounted within the image stabilization drive assembly 20 and housed within the mounting groove 2110. Thus, when the image stabilization drive assembly 20 is driven, it can carry the photosensitive component 30 and move it along a preset direction to adjust the optical performance of the camera module, such as performing optical image stabilization. Furthermore, the optical lens 10 is held on the light-sensing path of the photosensitive component 30. For example, the optical lens 10 is mounted on the image stabilization drive assembly 20 by being fixed to the top surface of the image stabilization drive assembly 20. This arrangement ensures that the optical lens 10 is held on the light-sensing path of the photosensitive component 30, allowing the photosensitive component 30 to receive light projected from the optical lens 10 for imaging.

[0073] More specifically, such as Figures 1 to 3 As shown, the optical lens 10 includes a lens barrel 11 and a lens group installed in the lens barrel 11, wherein the lens group includes at least one optical lens 12, and the number of the at least one optical lens 12 is not limited.

[0074] In one specific example of this application, the optical lens 10 is fixedly disposed on the light-sensing path of the photosensitive component 30, directly mounted on the top surface of the image stabilization drive assembly 20. In another example of this application, the optical lens 10 can be disposed on the top surface of the image stabilization drive assembly 20 via a lens mount 13, wherein the lens mount 13 has a through hole formed therein, through which light refracted by the optical lens 10 can enter the photosensitive component 30.

[0075] In another example of this application, the optical lens 10 can be mounted on the top surface of the image stabilization drive assembly 20 via a lens drive portion 14. The lens drive portion 14 has a mounting space formed therein, the optical lens 10 is mounted within the mounting space of the lens drive portion 14, and the lens drive portion 14 is capable of driving the optical lens 10 to move, thereby achieving optical focusing and / or optical image stabilization. In this example, the lens drive portion 14 can be a voice coil lens drive portion 14, a piezoelectric lens drive portion 14, an SMA (shape memory alloy) lens drive portion 14, or a similar type of drive lens drive portion 14. Further, in one example of this application, the lens mount 13 or the lens drive portion 14 can directly accommodate a plurality of optical lenses 12 of the optical lens 10; in another example of this application, the lens mount 13 or the lens drive portion 14 can accommodate the lens barrel 11 of the optical lens 10 and a plurality of optical lenses 12 disposed within the lens barrel 11.

[0076] It is worth mentioning that, in some examples of this specific example, the lens driving section 14 further includes a lens focusing section, which is adapted to drive the optical lens 10 to translate in the Z-axis direction to adjust the distance of the optical lens 10 relative to the photosensitive component 30, thereby realizing the focusing function of the optical lens 10. Furthermore, in some embodiments of this specific example, the lens driving section 14 may also include a lens image stabilization section, which is adapted to drive the optical lens 10 to translate in the X and Y-axis directions and / or rotate around the Z-axis direction to realize translational and / or rotational image stabilization of the optical lens 10; or, the lens image stabilization section is adapted to drive the optical lens 10 to rotate around the X-axis and around the Y-axis to realize tilt image stabilization of the optical lens 10. It should be noted that the lens driving section 14 may only include the lens focusing section or the lens image stabilization section; the lens driving section 14 may also include both the lens focusing section and the lens image stabilization section, thereby enabling the lens driving section 14 to achieve both lens focusing and lens image stabilization functions.

[0077] like Figure 4 As shown in this embodiment, the photosensitive component 30 includes a circuit board 31, a photosensitive chip 32, electronic components 33, a base 34, and a filter element 35. The photosensitive chip 32 is disposed on and electrically connected to the circuit board 31. For example, the photosensitive chip 32 is mounted on and electrically connected to the circuit board 31. The base 34 is disposed on the circuit board 31 and located around the photosensitive chip 32. The filter element 35 is held on the photosensitive path of the photosensitive chip 32 by being mounted on the base 34. The photosensitive chip 32 includes a photosensitive area and a non-photosensitive area surrounding the photosensitive area. The photosensitive area is composed of a pixel array and is used to receive and sense imaging light from the outside and convert the light signal into an electrical signal.

[0078] In one example of this application, the photosensitive chip 32 is mounted to the upper surface of the circuit board 31 using an adhesive and electrically connected to the circuit board 31 via gold wire bonding. Of course, in other examples of this application, the photosensitive chip 32 can also be disposed on the circuit board 31 and / or electrically connected to the circuit board 31 in other ways, for example, attached to the lower surface of the circuit board 31 in a flip-chip manner; this is not limited to this application. It should be understood that in the embodiments of this application, the photosensitive path of the photosensitive chip 32 forms the photosensitive path of the photosensitive component 30.

[0079] The base 34 is disposed on the circuit board 31 to encapsulate the electronic component 33 located on the circuit board 31 and to support other components. In a specific example of this application, the base is implemented as a separately molded plastic bracket, which is attached to the surface of the circuit board 31 by an adhesive and is used to support other components. Of course, in other examples of this application, the base can also be formed on the circuit board 31 in other ways. For example, the base is implemented as a molded base, which is integrally formed on a predetermined position of the circuit board 31 by a molding process. This is not limited to this application.

[0080] In this embodiment, the filter element 35 is held on the photosensitive path of the photosensitive chip 32 to filter the imaging light entering the photosensitive chip 32. In a specific example, the filter element 35 is mounted on the base 34 and corresponds to at least the photosensitive area of ​​the photosensitive chip 32, thereby holding the filter element 35 on the photosensitive path of the photosensitive chip 32.

[0081] It is worth mentioning that, in other examples of this application, the filter element 35 can also be mounted on the base 34 in other ways. For example, a filter element bracket can be first provided on the base 34, and then the filter element 35 can be mounted on the filter element bracket. That is, in this example, the filter element 35 can be indirectly mounted on the base 34 through other support members. Furthermore, in other examples of this application, the filter element 35 can also be mounted at other locations in the zoom camera module. For example, the filter element 35 can be formed inside the optical lens 10 (e.g., as a filter film attached to the surface of an optical lens of the zoom lens group). This is not limited to this application.

[0082] As mentioned earlier, in order to meet the increasingly broad market demands, high pixel count, large chip size, and small size are the irreversible development trends of existing camera modules. As the image sensor 32 develops towards high pixel count and large chip size, the size of the optical components adapted to the image sensor 32 (e.g., filter element 35, optical lens 10) is also gradually increasing, which brings new challenges to the driving elements used to drive the optical components to adjust optical performance (e.g., optical focusing, optical image stabilization, etc.).

[0083] Specifically, existing driving elements for optical components are electromagnetic motors, such as voice coil motors (VCMs) and shape memory alloy actuators (SMAs). However, with the increasing size and weight of optical components, existing electromagnetic motors are gradually becoming unable to provide sufficient driving force to move them. Quantitatively speaking, existing voice coil motors and shape memory alloy actuators are only suitable for driving optical components weighing less than 100mg. That is, if the weight of the optical component exceeds 100mg, existing actuators will not meet the application requirements of camera modules.

[0084] Furthermore, as mobile terminal devices become smaller and thinner, the density of components inside the drive elements also increases. Correspondingly, existing voice coil motors contain coils and magnets. When the two magnets are too close (less than 7mm), their internal magnetic fields interact, causing magnet displacement or vibration, reducing the stability of the drive control.

[0085] Therefore, a new driving solution is needed for camera modules. The new driver can not only meet the driving requirements of camera modules for adjusting optical performance, but also meet the development needs of camera modules for lightweighting and thinning.

[0086] Through research and experimentation, this application proposes a novel driver that not only has relatively greater driving force and better driving performance (specifically including: higher precision driving control and longer driving stroke), but also adapts to the current development trend of camera modules towards lighter and thinner designs.

[0087] Specifically, this novel driver is a piezoelectric actuator with a novel structure, which meets the technical requirements of the camera module for the driver. Furthermore, the piezoelectric actuator is arranged within the camera module in a suitable configuration to form a stabilization drive assembly 20 for driving the photosensitive component 30 to adjust its position, thereby meeting the structural and dimensional design requirements of the camera module.

[0088] like Figures 5 to 16As shown in the embodiment of this application, the image stabilization drive assembly 20 includes an image stabilization movable part 21, an image stabilization drive part 22, an image stabilization fixed part 23, a pre-pressure device 24, a guide device 25, and a drive substrate 26. The image stabilization movable part 21 is adapted to mount the photosensitive component 30 thereon. The image stabilization movable part 21 is movable relative to the image stabilization fixed part 23. The image stabilization drive part 22 is disposed between the image stabilization fixed part 23 and the image stabilization movable part 21 and is frictionally coupled to the image stabilization movable part 21. The image stabilization drive part 22 drives the image stabilization movable part 21 to move relative to the image stabilization fixed part 23 through the frictional driving force provided by the image stabilization drive part 22. In this way, the photosensitive component 30 is moved to adjust the optical performance of the camera module.

[0089] Accordingly, in the embodiments of this application, the photosensitive component 30 is linkedly mounted on the image stabilization movable part 21. For example, in a specific example of this application, the photosensitive component 30 is fixedly mounted on the image stabilization movable part 21, so that when the image stabilization driving part 22 drives the image stabilization movable part 21, the photosensitive component 30 is also driven by the image stabilization movable part 21. The image stabilization driving part 22 is disposed between the image stabilization fixed part 23 and the image stabilization movable part 21. For example, in a specific example of this application, the image stabilization driving part 22 is disposed between the image stabilization fixed part 23 and the movable part in such a way that it connects the image stabilization movable part 21 and the image stabilization fixed part 23 respectively. The image stabilization drive unit 22 is adapted to drive the photosensitive component 30 to translate in the X-axis direction (i.e., the direction set by the X-axis) and the Y-axis direction (i.e., the direction set by the Y-axis) and / or rotate around the Z-axis direction (i.e., the direction set by the Z-axis) to achieve translational image stabilization and / or rotational image stabilization of the photosensitive component 30. That is, the image stabilization drive unit 22 is adapted to actuate the image stabilization movable part 21 to move in the XOY plane set by the X-axis and Y-axis or rotate around the Z-axis perpendicular to the X-axis and the Y-axis in the XOY plane.

[0090] It is worth mentioning that, in this embodiment of the application, the X-axis direction and the Y-axis direction are perpendicular to each other, and the Z-axis direction is perpendicular to the plane containing the X-axis direction and the Y-axis direction. In other words, the X-axis, Y-axis and Z-axis constitute a three-dimensional coordinate system.

[0091] Specifically, in this embodiment, the anti-shake fixing part 23 has a receiving cavity 230, wherein the anti-shake movable part 21, the anti-shake driving part 22, the guiding device 25, the pre-pressure device 24 and the driving base plate 26 are received in the receiving cavity 230 of the anti-shake fixing part 23. That is, the anti-shake fixing part 23 can accommodate the anti-shake movable part 21, the anti-shake driving part 22, the guiding device 25, the pre-pressure device 24 and the driving base plate 26 therein. More specifically, in this embodiment of the application, the stabilizing movable part 21 is suspended and disposed within the receiving cavity 230 of the stabilizing fixed part 23 to divide the receiving cavity 230 into two parts (here, for ease of explanation, the two parts of the receiving cavity 230 are defined as: upper part 2301 and lower part 2302), wherein the pre-pressure device 24, the drive base plate 26 and the stabilizing drive part 22 are disposed in one part of the receiving cavity 230, while the pre-pressure device 24 is disposed in the other part of the receiving cavity 230.

[0092] Furthermore, in this embodiment, in one portion of the receiving cavity 230, the drive substrate 26 is electrically connected to the anti-shake drive unit 22 to enable the circuit conduction of the anti-shake drive assembly 20, and the pre-pressure device 24 maintains frictional coupling between the anti-shake drive unit 22 and the anti-shake movable part 21 through the pre-pressure it generates. In another portion of the receiving cavity 230, the guide device 25 guides the movement of the anti-shake movable part 21.

[0093] More specifically, in this embodiment, the stabilization movable part 21 is a mover that can translate in the X-axis and Y-axis directions and / or rotate around the Z-axis direction under the drive of the stabilization driving part 22, so as to realize the translational and / or rotational stabilization functions of the photosensitive component 30. In this application, since the stabilization driving part 22 uses a special driver as the driving element, the number of stabilization movable parts 21 is one, that is, only one stabilization movable part 21 is needed to realize the movement of translation in the X-axis and Y-axis directions and / or rotation around the Z-axis direction under the drive of the stabilization driving part 22.

[0094] Those skilled in the art will know that in traditional piezoelectric motor drive schemes, two movable parts (i.e., two movable carriers) are required to achieve translational movement in the X and Y axes. One movable carrier moves along the X-axis under the drive of the X-axis piezoelectric motor, and the other moves along the Y-axis under the drive of the Y-axis piezoelectric motor. Compared to traditional piezoelectric motor schemes, this application only requires one stabilization movable part 21 (i.e., only one movable carrier) to achieve translational movement in the X and Y axes. Accordingly, by reducing the number of stabilization movable parts 21, the height of the stabilization drive assembly 20 is reduced, thereby reducing the height of the camera module. Furthermore, due to the reduced number of stabilization movable parts 21, the internal component arrangement of the stabilization drive assembly 20 becomes more compact, facilitating a reduction in the length and width dimensions of the stabilization drive assembly 20.

[0095] like Figure 5 and Figure 6 As shown in this embodiment, the image stabilization movable part 21 includes a carrier body 211, a carrier extension arm 212, and a friction plate 213. The carrier body 211 forms a mounting groove 2110 for mounting the photosensitive component 30 therein, wherein the photosensitive component 30 is fixed in the mounting groove 2110 so that the photosensitive component 30 can move under the drive of the image stabilization movable part 21.

[0096] Preferably, in this embodiment, the carrier body 211 has a slot forming its sidewall, allowing the circuit board 31 of the photosensitive component 30 to extend through the slot and reach the motherboard of the electronic device. That is, in this embodiment, the carrier body 211 has a door formed on its side, allowing the circuit board 31 of the photosensitive component 30 to pass through and extend from the image stabilization drive assembly 20.

[0097] like Figure 5 and Figure 6As shown, in this embodiment, the carrier extension arm 212 extends outward from the carrier body 211. For example, the carrier extension arm 212 extends outward integrally from the carrier body 211. Specifically, in this embodiment, there is a certain height difference between the carrier extension arm 212 and the bottom surface of the carrier body 211; that is, the carrier extension arm 212 and the carrier body 211 do not extend at the same height. More specifically, in this embodiment, the height of the carrier extension arm 212 is higher than the height of the carrier body 211, and the carrier extension arm 212 extends upward and outward from the carrier body 211. Here, "upward" in this application refers to the direction from the image side to the object side, and "outward" refers to the direction away from the optical axis. The carrier extension arm 212 with the height difference, the carrier body 211, and the image stabilization fixing part 23 cooperate to form an accommodating space along the Z-axis. This accommodating space can be used to house the image stabilization driving part 22, making the structure of the camera module more compact.

[0098] like Figure 5 and Figure 6 As shown, in this embodiment, the friction plate 213 is disposed on the carrier extension arm 212. For example, the friction plate 213 is integrally formed on the carrier extension arm 212. Of course, the friction plate 213 and the carrier extension arm 212 can also be separate structures. For example, the friction plate 213 is an independent component, which is attached to the carrier extension arm 212 by an adhesive. Preferably, the friction plate 213 is disposed on the side of the carrier extension arm 212 facing the anti-shake drive part 22, that is, it is disposed on the lower surface of the carrier extension arm 212. Accordingly, in this embodiment, the friction plate 213 is clamped between the anti-shake movable part 21 and the anti-shake drive part 22, so that the anti-shake movable part 21 is frictionally coupled to the carrier extension arm 212 by the anti-shake drive part 22 and the pre-pressure device 24. It should be understood that the friction plate 213 is used to increase the friction between the anti-shake drive part 22 and the anti-shake movable part 21.

[0099] And, as Figure 5 and Figure 6 As shown in the embodiment of this application, the carrier extension arm 212 has two U-shaped grooves formed on opposite sides, wherein the anti-shake movable part 21 can be clamped through the U-shaped grooves during the installation process, which facilitates the installation.

[0100] like Figures 5 to 7As shown in a specific example of this application, the anti-shake fixing part 23 includes an upper cover 231 and a base 232 that are interlocked. A receiving cavity 230 is formed between the upper cover 231 and the base 232. The receiving cavity 230 is used to house the anti-shake movable part 21, the anti-shake driving part 22, the pre-pressure device 24, the guide device 25, and the driving base plate 26. In this way, not only can the various components in the anti-shake driving assembly 20 be protected from impact damage, but it can also prevent dust, dirt, or stray light from entering the interior of the anti-shake driving assembly 20.

[0101] More specifically, in this example, the upper cover 231 is fitted over the substrate 232, and the upper cover 231 has an opening corresponding to the photosensitive component 30, so that light reflected from the object can reach the photosensitive component 30. The upper cover 231 and the substrate 232 can be made of metal, such as cold-rolled carbon steel sheet (SPCC) or stainless steel, which not only provides magnetic conductivity (i.e., strengthens the magnetic field) but also helps dissipate heat from the photosensitive component 30. It should be understood that in this example, both the upper cover 231 and the substrate 232 are stators; that is, when the optical image stabilization function of the photosensitive component 30 is achieved, the upper cover 231 and the substrate 232 remain stationary. The optical lens 10 is fixedly mounted on the upper cover 231 and located on the light-sensing path of the photosensitive component 30.

[0102] When both the upper cover 231 and the base 232 are made of metal, notches must be provided at the four corners of the upper cover 231 and the base 232, and the sides adjacent to the notches can be bent so that the upper cover 231 and the base 232 can be nested and fixed. Since the photosensitive component 30 is disposed in the mounting groove 2110 of the image stabilization movable part 21 in this application, even if dust enters through the notch of the image stabilization fixing part 23, it will not enter the photosensitive component 30, and thus will not affect the imaging effect.

[0103] In other words, in this embodiment, the anti-shake fixing part 23 has a receiving cavity 230, and the anti-shake movable part 21 is suspended within the receiving cavity 230 of the anti-shake fixing part 23. It should be noted that in this embodiment, there is a gap between the anti-shake movable part 21 and the base 232, and a gap between the anti-shake movable part 21 and the upper cover 231. In this way, the anti-shake movable part 21 is suspended within the receiving cavity 230 of the anti-shake fixing part 23.

[0104] It should be understood that the anti-shake movable part 21 is suspended within the receiving cavity 230 to divide the receiving cavity 230 into an upper part 2301 and a lower part 2302. The upper part 2301 is formed between the upper cover 231 and the anti-shake movable part 21, while the lower part 2302 is formed between the anti-shake movable part 21 and the base 232. In other words, in this embodiment of the application, there is a gap between the bottom surface of the upper cover 231 and the top surface of the carrier extension arm 212 of the anti-shake movable part 21. The gap can be used to accommodate the guide device 25 so that the anti-shake movable part 21 can support the upper cover 231 of the anti-shake fixed part 23 through the guide device 25; and there is also a gap between the bottom surface of the base 232 and the bottom surface of the anti-shake movable part 21. The gap can be used to accommodate the anti-shake drive part 22, the drive base plate 26 and the pre-pressure device 24.

[0105] Furthermore, such as Figures 8 to 14 As shown in the embodiment of this application, the anti-shake driving part 22 is disposed between the anti-shake movable part 21 and the anti-shake fixed part 23. Preferably, the anti-shake driving part 22 is disposed between the carrier extension arm 212 of the anti-shake movable part 21 and the base 232 of the anti-shake fixed part 23, that is, the anti-shake driving part 22 is disposed in the lower part 2302 of the receiving cavity 230. After the anti-shake driving part 22 is installed on the anti-shake fixed part 23, it makes frictional contact with the anti-shake movable part 21 to drive the anti-shake movable part 21 to translate in the X-axis and Y-axis directions and / or rotate around the Z-axis direction. It should be noted that in this embodiment, the anti-shake drive unit 22 is disposed on the side of the carrier body 211 of the anti-shake movable part 21, that is, the anti-shake drive unit 22 is disposed in the accommodating space formed by the carrier extension arm 212 and the base 232, so as to avoid increasing the height of the anti-shake drive assembly 20.

[0106] More specifically, in this embodiment, the image stabilization drive unit 22 includes a first piezoelectric actuator 221 and a second piezoelectric actuator 222, which are respectively disposed on opposite sides of the image stabilization drive assembly 20. Preferably, in this embodiment, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are arranged parallel to each other on opposite sides of the photosensitive assembly 30, and the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are adapted to actuate the image stabilization movable part 21 and the photosensitive assembly 30 to move in the XOY plane defined by the X-axis and Y-axis or to rotate in the XOY plane about the Z-axis perpendicular to the X-axis and the Y-axis.

[0107] The first piezoelectric actuator 221 and the second piezoelectric actuator 222 have the same height so that the anti-shake movable part 21 will not tilt when disposed on the anti-shake drive part 22. That is, the anti-shake movable part 21 is stably supported on the first piezoelectric actuator 221 and the second piezoelectric actuator 222. It should be understood that in some examples of this application, the height dimensions of the first piezoelectric actuator 221 and the second piezoelectric actuator 222 may not be unequal, but preferably, the mounting surface formed by the first piezoelectric actuator 221 and the second piezoelectric actuator 222 is always a flat surface, so that the anti-shake movable part 21 can be stably supported on the mounting surface formed by the first piezoelectric actuator 221 and the second piezoelectric actuator 222.

[0108] More specifically, in the embodiments of this application, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are arranged relatively parallel to each other along the X-axis or Y-axis direction, that is, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are symmetrically arranged on opposite sides of the photosensitive component 30 with the X-axis or the Y-axis as the axis of symmetry.

[0109] Furthermore, in this embodiment of the application, the carrier extension arm 212 extends outward from the carrier body 211, thus forming an accommodating space between the carrier extension arm 212 and the substrate 232. The first piezoelectric actuator 221 and the second piezoelectric actuator 222 are respectively disposed in the accommodating space, and the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are fixed to the substrate 232 and frictionally coupled to the friction plate 213 disposed on the lower surface of the carrier extension arm 212 along the height direction.

[0110] In this embodiment, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are implemented as the same type of piezoelectric actuator. Specifically, in this embodiment, the piezoelectric actuator is a traveling-wave piezoelectric actuator, which has nanometer-level step-level precision, enabling it to meet more demanding optical system requirements. Furthermore, the thrust of the piezoelectric actuator is 10 times greater than that of a typical VCM motor (Voice Coil Motor). Compared to a typical VCM motor, the piezoelectric actuator does not require components such as coil magnets, avoiding electromagnetic interference and reducing reliability risks. The piezoelectric actuator used in this application has a motion resolution of 1 nm, achieving a super-resolution high precision requirement of 0.5 μm. The piezoelectric actuator has a cuboid structure; that is, on the XOY plane, the cross-section of the piezoelectric actuator is a rectangular structure, including two long sides along the length direction and two short sides along the width direction. Due to the structure of the piezoelectric actuators themselves, the piezoelectric actuators are arranged relatively parallel to each other on both sides of the photosensitive component 30. That is, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are arranged relatively parallel to each other on the anti-shake fixing part 23 with the X-axis or Y-axis as the axis of symmetry. This arrangement allows the first piezoelectric actuator 221 and the second piezoelectric actuator 222 to maintain better consistency, so that the photosensitive component 30 can maintain smooth movement when driven.

[0111] like Figure 9 As shown, the piezoelectric actuator includes a piezoelectric ceramic plate 223 and a friction drive unit 224. After the piezoelectric actuator is powered, the piezoelectric ceramic plate 223 of the piezoelectric actuator undergoes two surface shape changes in a traveling wave state, thereby driving the friction drive unit 224 to produce a unidirectional oscillating reciprocating motion along the X-axis and / or Y-axis. Due to the frictional contact between the friction drive unit 224 and the friction plate 213, the friction plate 213 is moved.

[0112] Specifically, when the piezoelectric actuator is excited by one power source, the piezoelectric ceramic plate 223 will generate a wave-like motion along its length direction, and the friction part will oscillate along its length direction under the drive of the piezoelectric ceramic plate, thereby driving the friction plate 213 to move along the length direction of the piezoelectric actuator; when the piezoelectric actuator is excited by another power source, the piezoelectric ceramic plate 223 will generate a serpentine motion along its width direction, and the friction part will oscillate along its width direction under the drive, thereby driving the friction plate 213 to move along the width direction of the piezoelectric actuator.

[0113] In one example of this application, the piezoelectric actuator can achieve surface shape changes along its length or width direction, that is, the piezoelectric actuator can simultaneously achieve surface shape changes along its length and width directions. When the piezoelectric actuator is set along the X-axis, its length direction is along the X-axis and its width direction is along the Y-axis; when the piezoelectric actuator is set along the Y-axis, its length direction is along the Y-axis and its width direction is along the X-axis. Compared to existing piezoelectric motors that can only achieve drive in one direction, the piezoelectric actuator in this application can generate different waveforms to achieve X and Y direction movement, and by utilizing the cooperation of the first piezoelectric actuator 221 and the second piezoelectric actuator 222, Z-axis rotational movement can also be achieved. Furthermore, the height of the piezoelectric actuator in this application is 0.7mm to 0.9mm, which can be hidden in the anti-shake drive assembly 20 to reduce the height of the anti-shake drive assembly 20.

[0114] Therefore, driven by the piezoelectric actuator, only one of the image stabilization movable parts 21 is needed to achieve movement in the XOY plane, thereby driving the photosensitive component 30 to achieve translational image stabilization and / or rotational image stabilization functions. Compared with the existing piezoelectric motor, the number of image stabilization movable parts 21 is reduced, which not only simplifies the structure of the camera module, but also helps to reduce the height of the camera module.

[0115] Accordingly, the first piezoelectric actuator 221 includes a first piezoelectric ceramic plate 2211 and a first friction drive portion 2212. The first piezoelectric ceramic plate 2211 is composed of very small piezoelectric ceramics. After the first piezoelectric ceramic plate 2211 is provided with a power excitation, it is adapted to deform through the inverse piezoelectric effect, thereby causing the first friction drive portion 2212 on the first piezoelectric ceramic plate 2211 to move accordingly. In this application, the first piezoelectric ceramic plate 2211 is fixedly disposed on the substrate 232, and the first friction drive portion 2212 faces the friction plate 213 on the anti-vibration movable portion 21, and the first friction drive portion 2212 maintains frictional contact with the friction plate 213, so that the first friction drive portion 2212 can drive the friction plate 213 to move.

[0116] Specifically, in one example of this application, the first friction drive unit 2212 is located below the friction plate 213 and in frictional contact with the friction plate 213. Preferably, in the initial state, the first friction drive unit 2212 is located at the middle position of the friction plate 213, and the friction plate 213 can translate in the X-axis and Y-axis directions and / or rotate about the Z-axis direction under the drive of the anti-shake drive unit 22. It should be understood that in other examples of this application, in the initial state, the first friction drive unit 2212 may also be located at other positions of the friction plate 213, for example, at the end of the friction plate 213, and this is not limited to this application. Furthermore, more preferably, the area of ​​the friction plate 213 is larger than the driving stroke of the first piezoelectric actuator 221.

[0117] Accordingly, the second piezoelectric actuator 222 includes a second piezoelectric ceramic plate 2221 and a second friction drive portion 2222. The second piezoelectric ceramic plate 2221 is composed of very small piezoelectric ceramics. After the second piezoelectric ceramic plate 2221 is powered, it is adapted to deform due to the inverse piezoelectric effect, thereby causing the second friction drive portion 2222 on the second piezoelectric ceramic plate 2221 to move accordingly. In this application, the second piezoelectric ceramic plate 2221 is fixedly disposed on the substrate 232, and the second friction drive portion 2222 faces the friction plate 213 on the anti-vibration movable portion 21, and the second friction drive portion 2222 maintains frictional contact with the friction plate 213, so that the second friction drive portion 2222 can drive the friction plate 213 to move.

[0118] Specifically, in one example of this application, the second friction drive unit 2222 is located below the friction plate 213 and in frictional contact with the friction plate 213. Preferably, in the initial state, the second friction drive unit 2222 is located at the middle position of the friction plate 213, and the friction plate 213 can translate in the X-axis and Y-axis directions and / or rotate about the Z-axis direction under the drive of the anti-shake drive unit 22. Of course, in other examples of this application, in the initial state, the second friction drive unit 2222 may also be located at other positions of the friction plate 213, for example, at the end of the friction plate 213, which is not limited to this application. More preferably, the area of ​​the friction plate 213 is larger than the driving stroke of the first piezoelectric actuator 221.

[0119] Furthermore, in a specific example of this application, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are arranged relatively parallel to each other along the X-axis direction, that is, the length direction of the first piezoelectric actuator 221 and the second piezoelectric actuator 222 is along the X-axis direction, and the width direction of the first piezoelectric actuator 221 and the second piezoelectric actuator 222 is along the Y-axis direction. Accordingly, in this specific example, the first piezoelectric actuator 221 deforms along the length direction, the second piezoelectric actuator 222 deforms along the length direction, and the anti-shake movable part 21 moves along the X-axis direction under the joint drive of the first piezoelectric actuator 221 and the second piezoelectric actuator 222. Of course, in this specific example, the first piezoelectric actuator 221 generates deformation along the width direction, the second piezoelectric actuator 222 generates deformation along the width direction, and the anti-shake movable part 21 moves along the Y-axis direction under the joint drive of the first piezoelectric actuator 221 and the second piezoelectric actuator 222.

[0120] Furthermore, in this specific example, the first piezoelectric actuator 221 generates deformation along the length direction, and the second piezoelectric actuator 222 generates deformation in the opposite direction along the length direction (i.e., the +X direction and the -X direction). The image stabilization movable part 21 achieves rotational movement around the Z-axis under the drive of the first piezoelectric actuator 221 and the second piezoelectric actuator 222. That is, in this application, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 can cooperate with each other to drive the image stabilization movable part 21 to translate in the X-axis and Y-axis directions and / or rotate around the Z-axis direction, so as to achieve translational image stabilization and / or rotational image stabilization of the photosensitive component 30.

[0121] It should be understood that since the first piezoelectric actuator 221 and the second piezoelectric actuator 222 can generate deformation along both the length and width directions, only one of the anti-shake movable parts 21 can achieve translational anti-shake in the XOY plane and rotational anti-shake around the Z-axis under the drive of the first piezoelectric actuator 221 and the second piezoelectric actuator 222.

[0122] Specifically, in one example of this application, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 first generate deformation along the length direction and then generate deformation along the width direction. The anti-shake movable part 21 moves first along the X-axis direction and then along the Y-axis direction under the drive of the first piezoelectric actuator 221 and the second piezoelectric actuator 222. In this way, the anti-shake movable part 21 can move in the plane where XOY is located. Specifically, in this embodiment, although the first piezoelectric actuator 221 and the second piezoelectric actuator 222 can generate deformation in the width or length direction to provide driving force in two directions, the driving force provided by the first piezoelectric actuator 221 and the second piezoelectric actuator 222 is limited to the length and width directions, that is, limited to the X-axis and Y-axis directions. Therefore, when it is necessary to drive the photosensitive component 30 to move along a certain tilt direction for optical image stabilization, it must first move along the X-axis direction and then move along the Y-axis direction (of course, it can also move along the Y-axis direction first and then move along the X-axis direction) and cannot move directly along the tilt direction. This is also an important difference between it and the traditional image stabilization performed by a VCM motor.

[0123] Furthermore, the first piezoelectric actuator 221 generates deformation in a first direction (e.g., the positive direction of the X-axis) along the X-axis, and the second piezoelectric actuator 222 generates deformation in a second direction (e.g., the negative direction of the X-axis) along the X-axis. That is, the first friction drive unit 2212 generates a driving force in the positive direction of the X-axis, and the second friction drive unit 2222 generates a driving force in the negative direction of the X-axis. In this way, the image stabilization movable part 21 and the photosensitive component 30 achieve rotational movement about the Z-axis under the drive of the first piezoelectric actuator 221 and the second piezoelectric actuator 222.

[0124] In another example of this application, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 first generate deformation along the width direction, and then generate deformation along the length direction. The anti-shake movable part 21 moves first along the Y-axis direction and then along the X-axis direction under the drive of the first piezoelectric actuator 221 and the second piezoelectric actuator 222, so that the anti-shake movable part 21 can move in the plane where XOY is located. The first piezoelectric actuator 221 generates deformation in a first direction (e.g., the positive direction of the X-axis) along the X-axis, and the second piezoelectric actuator 222 generates deformation in a second direction (e.g., the negative direction of the X-axis) along the X-axis. That is, the first friction drive unit 2212 generates a driving force in the positive direction of the X-axis, and the second friction drive unit 2222 generates a driving force in the negative direction of the X-axis. In this way, the image stabilization movable part 21 and the photosensitive component 30 achieve rotational movement about the Z-axis under the drive of the first piezoelectric actuator 221 and the second piezoelectric actuator 222.

[0125] That is, in this embodiment of the application, the first piezoelectric actuator 221 is adapted to deform along the direction set by the X-axis to actuate the image stabilization movable part 21 and the photosensitive component 30 to move along the direction set by the X-axis, and the second piezoelectric actuator 222 is adapted to deform along the direction set by the X-axis to actuate the image stabilization movable part 21 and the photosensitive component 30 to move along the direction set by the X-axis, so that the image stabilization movable part 21 and the photosensitive component 30 are actuated along the direction set by the X-axis by the first piezoelectric actuator 221 and the second piezoelectric actuator 222. Furthermore, the first piezoelectric actuator 221 is adapted to deform along the direction set by the Y-axis to actuate the image stabilization movable part 21 and the photosensitive component 30 to move along the direction set by the Y-axis, and the second piezoelectric actuator 222 is adapted to deform along the direction set by the Y-axis to actuate the image stabilization movable part 21 and the photosensitive component 30 to move along the direction set by the Y-axis, so that the image stabilization movable part 21 and the photosensitive component 30 are actuated along the direction set by the Y-axis by the first piezoelectric actuator 221 and the second piezoelectric actuator 222. Furthermore, the first piezoelectric actuator 221 is adapted to deform along a first direction set by the X-axis to actuate the image stabilization movable part 21 and the photosensitive component 30 to move along the first direction set by the X-axis, and the second piezoelectric actuator 222 is adapted to deform along a second direction set by the X-axis opposite to the first direction to actuate the image stabilization movable part 21 and the photosensitive component 30 to move along the second direction set by the X-axis, so that the photosensitive component 30 is actuated about the Z-axis in the XOY plane by the first piezoelectric actuator 221 and the second piezoelectric actuator 222. Furthermore, the first piezoelectric actuator 221 is adapted to deform along a first direction set by the Y-axis to actuate the image stabilization movable part 21 and the photosensitive component 30 to move along the first direction set by the Y-axis, and the second piezoelectric actuator 222 is adapted to deform along a second direction set by the Y-axis opposite to the first direction to actuate the image stabilization movable part 21 and the photosensitive component 30 to move along the second direction set by the Y-axis, so that the photosensitive component 30 is actuated about the Z-axis in the XOY plane by the first piezoelectric actuator 221 and the second piezoelectric actuator 222.

[0126] In summary, in this application, the anti-shake movable part 21 can either first achieve translational anti-shake in the XOY plane and then achieve rotational anti-shake around the Z axis; or it can first achieve rotational anti-shake around the Z axis and then achieve translational anti-shake in the XOY plane.

[0127] Further, in this embodiment, the anti-shake driving part 22 is disposed below the anti-shake movable part 21 along the height direction. Specifically, the first piezoelectric ceramic plate 2211 is disposed on the anti-shake fixing part 23, the first friction driving part 2212 is frictionally coupled to the anti-shake movable part 21, the second piezoelectric ceramic plate 2221 is disposed on the anti-shake fixing part 23, and the second friction driving part 2222 is frictionally coupled to the anti-shake movable part 21. The pre-pressure device 24 is clamped and fixed between the first piezoelectric ceramic plate 2211 and the substrate 232 and between the second piezoelectric ceramic plate 2221 and the substrate 232, so that the pre-pressure provided by the pre-pressure device 24 keeps the first friction driving part 2212 and the second friction driving part 2222 in frictional contact with the friction plate 213 of the carrier extension arm 212.

[0128] In this application, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 can form a self-locking structure. That is, after the applied voltage is stopped, the first piezoelectric actuator 221 and the second piezoelectric actuator 222, under the action of the pre-pressure device 24, hold the anti-shake movable part 21 in its current position, preventing it from changing position due to external shaking. This keeps the optical system of the camera module unchanged, thus avoiding any impact on the imaging effect. It also eliminates the need to add a self-locking device to the camera module, relatively reducing the size of the camera module. Due to the self-locking structure formed by the first piezoelectric actuator 221 and the second piezoelectric actuator 222, it is not necessary to keep the piezoelectric actuators active to maintain their position.

[0129] like Figure 11 and Figure 14 As shown, in the anti-shake drive assembly 20, the pre-pressure device 24 provides pre-pressure between the anti-shake drive part 22 and the anti-shake movable part 21, so that the friction drive part 224 of the anti-shake drive part 22 can be frictionally coupled to the anti-shake movable part 21, so as to drive the anti-shake movable part 21 to move along the drive direction by friction.

[0130] Specifically, such as Figure 11 and Figure 14As shown, the pre-pressure device 24 includes a first elastic element 241 and a second elastic element 242. The first elastic element 241 is disposed between the first piezoelectric ceramic plate 2211 of the first piezoelectric actuator 221 and the substrate 232, so that the elastic force of the first elastic element 241 provides that the first piezoelectric actuator 221 is clamped between the carrier extension arm 212 of the anti-shake movable part 21 and the substrate 232 of the anti-shake fixed part 23, that is, the first friction drive part 2212 of the first piezoelectric actuator 221 abuts against the carrier extension arm 212 of the anti-shake movable part 21, and in this way, the first piezoelectric actuator 221 is frictionally coupled to the anti-shake movable part 21. The second elastic element 242 is disposed between the second piezoelectric ceramic plate 2221 of the second piezoelectric actuator 222 and the substrate 232, so that the second piezoelectric actuator 222 is clamped between the carrier extension arm 212 of the anti-shake movable part 21 and the substrate 232 of the anti-shake fixed part 23 by the elastic force of the second elastic element 242. That is, the second friction drive part 2222 of the second piezoelectric actuator 222 abuts against the carrier extension arm 212 of the anti-shake movable part 21. In this way, the second piezoelectric actuator 222 is frictionally coupled to the anti-shake movable part 21.

[0131] In a specific example of this application, the pre-pressure device 24 is implemented as an elastic adhesive, that is, the first elastic element 241 and the second elastic element 242 are implemented as an adhesive that is elastic after curing. Accordingly, during installation, an adhesive layer with a thickness of 10 μm to 50 μm can be applied between the inner bottom surface of the substrate 232 and the first piezoelectric ceramic plate 2211, and between the inner bottom surface of the substrate 232 and the second piezoelectric ceramic plate 2221, respectively, so that the first elastic element 241 and the second elastic element 242 are formed after the adhesive has cured. That is, the first elastic element 241 and the second elastic element 242 of the pre-pressure device 24 provide pre-pressure while also enabling the anti-shake drive part 22 to be fixed to the bottom surface of the inner sidewall of the substrate 232.

[0132] Preferably, the pre-pressure device 24 has a relatively high flatness, that is, when applying the adhesive to form the first elastic element 241 and the second elastic element 242, the applied adhesive is made as flat and uniform as possible, so that the anti-shake drive part 22 can be flatly fixed to the substrate 232, thereby improving the stability of the anti-shake drive part 22. Of course, in other examples of this application, the first elastic element 241 and the second elastic element 242 of the pre-pressure device 24 can also be implemented as rubber, which is elastic in its material properties, or as a spring that is elastic due to its shape; or as an elastic material with adhesive properties, such as adhesives (silicone, UV glue, thermosetting glue, UV thermosetting glue, etc.).

[0133] It should be understood that in this embodiment, the pre-pressure device 24 is disposed on the base 232, and the pre-pressure device 24 generates an upward pre-pressure along the Z-axis direction. The pre-pressure can maintain the friction drive part 224 of the anti-shake drive part 22 and the friction plate 213 of the anti-shake movable part 21 in frictional contact. Furthermore, the pre-pressure can also keep the guide device 25 clamped between the upper cover 231 and the carrier extension arm 212 of the anti-shake movable part 21. The direction of the pre-pressure is perpendicular to the direction of the driving force.

[0134] like Figures 12 to 14 As shown, in order to improve the stability of the camera module's movement during optical image stabilization and improve image quality, a guide device 25 is provided between the upper cover 231 and the movable stabilization part 21. This guide device 25 provides support to the movable stabilization part 21 during its movement relative to the fixed stabilization part 23, ensuring smooth sliding. Specifically, in this embodiment, the stabilization drive assembly 20 further includes a guide device 25 disposed between the upper surface of the carrier extension arm 212 and the upper cover 231. The guide device 25 is adapted to guide the movable stabilization part 21 to move within the XOY plane defined by the X-axis and the Y-axis.

[0135] In a specific example of this application, the guiding device 25 includes a first guiding groove 252 recessed in the anti-shake movable part 21 and a guiding element 251 housed within the first guiding groove 252. As previously described, under the action of the pre-pressure device 24, the guiding device 25 can maintain contact with the anti-shake movable part 21 and guide its movement during the movement of the anti-shake movable part 21 relative to the anti-shake fixed part 23, so that the anti-shake movable part 21 can move smoothly. It should be understood that since the guiding element 251 is placed within the first guiding groove 252, the movement trajectory of the guiding element 251 is restricted within the first guiding groove 252. The guiding element 251 can move within the first guiding groove 252 along a plane perpendicular to the optical axis to provide guidance for the movement of the anti-shake movable part 21.

[0136] Specifically, in this example, the guiding device 25 is formed in the upper part 2301 of the receiving cavity 230. The first guiding groove 252 is recessed in the upper surface of the carrier extension arm 212 of the anti-shake movable part 21, and the opening of the first guiding groove 252 faces the upper cover 231 of the anti-shake fixing part 23. That is, the portion of the upper cover 231 facing the first guiding groove 252 is a planar structure, and the portion of the carrier extension arm 212 facing the ball is a groove structure. That is, the guiding element 251 is housed in the first guiding groove 252 of the carrier extension arm 212, and the guiding element 251 can only move within the first guiding groove 252. The first guiding groove 252 limits the movement of the guiding element 251 to prevent the guiding element 251 from leaving its range of movement.

[0137] In a specific example of this application, the guide element 251 is implemented as a ball bearing, for example, the guide element 251 is implemented as a ball bearing formed of ceramic material. Preferably, in this specific example, the depth of the first guide groove 252 is less than or equal to the diameter of the ball bearing, so that at least a portion of the ball bearing can be exposed on the top surface of the first guide groove 252, so that the ball bearing can make frictional contact with the carrier extension arm 212 of the anti-shake movable part 21.

[0138] In this embodiment, the number of guiding devices 25 is at least 3, that is, the anti-shake drive assembly 20 includes at least 3 guiding devices 25. Preferably, in this embodiment, the number of guiding devices 25 is 4, which can be located at the four corners of the anti-shake drive assembly 20 to provide stable support for the anti-shake movable part 21, and can make full use of the empty corner space of the anti-shake drive assembly 20, making the structure of the anti-shake drive assembly 20 more compact.

[0139] It is worth mentioning that in other examples of this application, the guiding device 25 can also be a slider-groove structure. This application does not limit this; that is, the guiding element 251 can also be implemented as a groove, and the first guiding groove 252 is a groove. Furthermore, in other examples of this application, a second guiding groove (not shown in the figure) with a direction can also be provided between the upper cover 231 and the upper surface of the anti-shake movable part 21. The guiding element 251 is placed in the second guiding groove, and the movement trajectory of the guiding element 251 is restricted within this track, thus playing a guiding role during the movement of the photosensitive component 30. Moreover, since when the guiding element 251 is a ball bearing, the ball bearing can replace sliding friction with rolling friction, which can further reduce the friction between the anti-shake movable part 21 and the upper cover 231.

[0140] For example, in a specific example of this application, a second guide groove along the x-axis can be provided on the bottom surface of the upper cover 231, and a second guide groove along the y-axis can be provided on the upper surface of the carrier extension arm 212 (the bottom surface and the upper surface refer to the direction along the optical axis, from the photosensitive chip 32 to the optical lens 10). The second guide groove in the x-axis direction and the second guide groove in the y-axis direction are arranged opposite each other to form a cross-shaped receiving cavity to accommodate the guide element 251. Preferably, the number of guide elements 251 and receiving cavities is 4, so that the image stabilization movable part 21 can remain stable. When performing optical image stabilization, the guide element 251 and the second guide groove serve as a guiding mechanism, which can provide a larger OIS travel for the photosensitive assembly 30. Of course, in other embodiments of this application, both a track along the x-axis direction and a second guide groove along the y-axis direction can be provided on the upper surface of the carrier extension arm 212, and the two tracks on the same side are located on the same side of the carrier extension arm 212. In contrast, a second guide groove with a different direction than the upper surface of the carrier extension arm 212 is provided on the lower surface of the upper cover 231. Specifically, a second guide groove in the y-axis direction is provided on the upper cover 231 at a position opposite to the second guide groove in the x-axis direction on the carrier extension arm 212, and a second guide groove in the x-axis direction is provided on the upper cover 231 at a position opposite to the second guide groove in the y-axis direction on the carrier extension arm 212, in order to avoid interference.

[0141] It should be noted that in this embodiment, the guide element 251 of the guide device 25 is clamped between the stabilizing movable part 21 and the upper cover 231 of the stabilizing fixed part 23. That is, the guide element 251 of the guide device 25 is clamped in the upper part 2301 of the receiving cavity 230. Therefore, the guide element 251 can also provide a pre-pressure that allows the stabilizing movable part 21 to move downward so that the stabilizing movable part 21 is frictionally coupled to the stabilizing drive part 22. In other words, in this embodiment, the guide element 251 of the guide device 25 also substantially functions as a pre-pressure device 24. That is, the guide element 251 can both provide support for the stabilizing movable part 21 as part of the guide device 25 and provide the necessary pre-pressure for the stabilizing drive part 22 as a pre-pressure device 24.

[0142] More specifically, in this embodiment, the guide element 251 is clamped between the upper cover 231 and the anti-shake movable part 21. Therefore, through the weight of the guide element 251 itself and the force applied by the upper cover 231, the guide element 251 can generate a pre-pressure that forces the anti-shake movable part 21 downward. The anti-shake drive part 22 and the pre-pressure device 24 are provided on the lower side of the anti-shake movable part 21. In this way, the pre-pressure generated by the guide element 251 can make the anti-shake movable part 21 abut against the anti-shake drive part 22. On the other hand, the pre-pressure device 24 can provide an upward pre-pressure for the anti-shake drive part 22. Thus, under the synergistic action of the guide element 251 and the pre-pressure device 24, it can be ensured that the anti-shake drive part 22 is always in frictional contact with the anti-shake movable part 21.

[0143] Further, in this embodiment, the first piezoelectric ceramic plate 2211 and the second piezoelectric ceramic plate 2221 are respectively fixed to the inner bottom surface of the substrate 232 in parallel with each other. The first friction drive part 2212 and the second friction drive part 2222 are fixed on the first piezoelectric ceramic plate 2211 and the second piezoelectric ceramic plate 2221 and face towards the anti-shake movable part 21, and maintain frictional contact with the friction plate 213 of the anti-shake movable part 21. That is, along the height direction, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are respectively disposed below the anti-shake movable part 21, and the guide element 251 is disposed between the anti-shake movable part 21 and the upper cover 231, that is, the guide element 251 is disposed above the anti-shake movable part 21. In other words, the arrangement of the module from top to bottom along the Z-axis is as follows: upper cover 231, guide element 251, anti-shake movable part 21, first piezoelectric actuator 221 and second piezoelectric actuator 222, and base 232. The anti-shake movable part 21 is clamped between the guide element 251 and the first piezoelectric actuator 221 and the second piezoelectric actuator 222. The guide element 251 can generate a downward pre-pressure under the action of the upper cover 231. The pre-pressure enables the first piezoelectric actuator 221 and the second piezoelectric actuator 222 to maintain frictional contact with the friction plate 213 of the anti-shake movable part 21.

[0144] In this application, the first friction drive unit 2212 and the second friction drive unit 2222 respectively make frictional contact with the opposite sides of the carrier extension arm 212, and the guide element 251 makes frictional contact with the four corners of the upper cover 231 and the carrier extension arm 212. The friction between the friction drive unit and the friction plate 213 is active friction, and the friction between the guide element 251 and the upper cover 231 is passive friction. The frictional force between the first friction drive unit 2212, the second friction drive unit 2222 and the friction plate 213 of the carrier extension arm 212 is greater than the frictional force between the guide element 251 and the upper cover 231. That is, under the drive of the first piezoelectric actuator 221 and the second piezoelectric actuator 222, a large frictional force is generated between the first friction drive unit 2212, the second friction drive unit 2222 and the friction plate 213 of the carrier extension arm 212, thereby driving the anti-shake movable part 21 to move. When the anti-shake movable part 21 moves, a small frictional force is generated between the guide element 251 and the upper cover 231 to avoid hindering the movement of the anti-shake movable part 21 and thus affecting the anti-shake effect.

[0145] It is worth mentioning that, in other examples of this application, the guiding device 25 may also be disposed between the anti-shake movable part 21 and the base 232 (i.e., disposed in the lower part 2302 of the receiving cavity 230), while the anti-shake drive part 22, the pre-pressure device 24, and the drive base plate 26 are disposed between the anti-shake movable part 21 and the upper cover 231 (i.e., disposed in the upper part 2301 of the receiving cavity 230). However, what remains unchanged is that the guiding element 251 of the guiding device 25 is clamped in the lower part 2302 of the receiving cavity 230 and provides pre-pressure so that the anti-shake movable part 21 abuts against the anti-shake drive part 22. That is, although the positions of the guiding device 25 and the anti-shake drive part 22 relative to the anti-shake movable part 21 can be adjusted, the guiding element 251 of the guiding device 25 can still perform a dual function: guiding and pre-pressure.

[0146] Furthermore, such as Figures 5 to 15 As shown in the embodiment of this application, the driving substrate 26 is disposed between the image stabilization driving part 22 and the substrate 232. Specifically, as... Figure 5 As shown, a set of positioning points 2321 are provided on the bottom surface of the substrate 232, and the driving substrate 26 is fixed on the substrate 232 through the positioning points 2321 of the substrate 232.

[0147] The driving substrate 26 includes a connection terminal 263 and at least one conductive terminal. Preferably, the conductive terminal has a split structure and the number of conductive terminals is two, that is, the at least one conductive terminal includes a first conductive terminal 261 and a second conductive terminal 262. The first piezoelectric ceramic plate 2211 of the first piezoelectric actuator 221 and the second piezoelectric ceramic plate 2221 of the second piezoelectric actuator 222 are respectively disposed and electrically connected to the first conductive terminal 261 and the second conductive terminal 262 of the driving substrate 26, so that the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are connected by the driving substrate 26. That is, the first conductive terminal 261 is disposed on the same side as the first piezoelectric actuator 221, and the second conductive terminal 262 is disposed on the same side as the second piezoelectric actuator 222. The connection end 263 is disposed on the side of the anti-shake drive assembly 20 where the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are not disposed. For example, the connection end 263 is disposed between the first conductive end 261 and the second conductive end 262, and the connection end 263 electrically connects the first conductive end 261 and the second conductive end 262, thereby enabling circuit connection between the first conductive end 261 and the second conductive end 262 and the electronic device motherboard. In this application, the drive substrate 26 and the circuit board 31 are respectively fixedly connected to the electronic device motherboard and circuit connection is achieved to reduce the resistance generated by the drive substrate 26 to the movement of the circuit board 31.

[0148] Of course, in other examples of this application, the driving substrate 26 may be disposed between the substrate 232 and the pre-pressure device 24, or the driving substrate 26 may be disposed between the pre-pressure device 24 and the anti-shake driving part 22. That is, the driving substrate 26 may be directly disposed on the substrate 232, or it may be indirectly disposed on the substrate 232 through the pre-pressure device 24.

[0149] Specifically, in this embodiment, the substrate 232 has a slot formed in its sidewall, through which the connecting end 263 extends and achieves circuit communication with the motherboard of the electronic device. Preferably, the circuit board 31 and the connecting end 263 extend from the same side of the image stabilization drive assembly 20, that is, the slot of the substrate 232 and the opening of the image stabilization movable part 21 are set on the same side, so that the circuit board 31 and the connecting end 263 are electrically connected to the motherboard of the electronic device from the same side of the image stabilization drive assembly 20. The image stabilization movable part 21 is disposed above the substrate 232, and the circuit board 31 is disposed above the drive substrate 26. The connecting end 263 of the circuit board 31 and the drive substrate 26 has a certain gap along the height direction. The gap prevents the circuit board 31 from contacting the drive substrate 26 during movement, thereby affecting the optical image stabilization effect. The gap ranges from 0.1mm to 0.15mm.

[0150] Of course, in other examples of this application, the driving substrate 26 and the circuit board 31 can also be extended from different sides of the anti-shake driving component 20 and electrically connected to the motherboard of the electronic device. That is, the openings of the base 232 and the sidewall of the anti-shake movable part 21 can be set on different sides, such as opposite sides or adjacent sides, so that the movement of the circuit board 31 will not be affected.

[0151] Figure 15 The figure illustrates a modified embodiment of the image stabilization drive assembly 20 according to an embodiment of this application, wherein, as shown... Figure 15 As shown, unlike the above embodiment, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 can also be arranged relatively parallel along the Y-axis direction, that is, the length direction of the first piezoelectric actuator 221 and the second piezoelectric actuator 222 is along the Y-axis direction, and the width direction of the first piezoelectric actuator 221 and the second piezoelectric actuator 222 is along the Y-axis direction.

[0152] In one example of this application, the first piezoelectric actuator 221 generates deformation along the length direction, and the second piezoelectric actuator 222 generates deformation along the length direction. The anti-shake movable part 21 moves along the Y-axis direction under the joint drive of the first piezoelectric actuator 221 and the second piezoelectric actuator 222. In another example of this application, the first piezoelectric actuator 221 generates deformation along the width direction, and the second piezoelectric actuator 222 generates deformation along the width direction. The anti-shake movable part 21 moves along the X-axis direction under the joint drive of the first piezoelectric actuator 221 and the second piezoelectric actuator 222. In yet another example of this application, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 generate deformation along the width direction. The two piezoelectric actuators 222 first generate deformation along the length direction, and then generate deformation along the width direction. The anti-shake movable part 21 moves first along the Y-axis direction and then along the X-axis direction under the drive of the first piezoelectric actuator 221 and the second piezoelectric actuator 222. That is, the anti-shake movable part 21 can move in the plane where XOY is located. In another example of this application, the first piezoelectric actuator 221 generates deformation along the length direction, and the second piezoelectric actuator 222 generates deformation in the opposite direction to the length direction (i.e., the +Y direction and the -Y direction). The anti-shake movable part 21 achieves rotational movement around the Z-axis under the drive of the first piezoelectric actuator 221 and the second piezoelectric actuator 222. In other words, in this application, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 can cooperate with each other to drive the anti-shake movable part 21 to translate in the X-axis and Y-axis directions and / or rotate around the Z-axis direction, so as to realize the translational anti-shake and / or rotational anti-shake of the photosensitive component 30.

[0153] Figure 16 The illustration shows another modified embodiment of the image stabilization drive assembly 20 according to an embodiment of this application, wherein, as Figure 16 As shown, unlike the previous embodiment, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are arranged perpendicularly to each other. Specifically, the length direction of the first piezoelectric actuator 221 is along the X-axis, and its width direction is along the Y-axis; the length direction of the second piezoelectric actuator 222 is along the Y-axis, and its width direction is along the X-axis. The first piezoelectric actuator 221 and the second piezoelectric actuator 222 are located on adjacent sides of the drive assembly 20.

[0154] In one example of this application, the first piezoelectric actuator 221 generates deformation along the length direction, and the second piezoelectric actuator 222 generates deformation along the width direction. The anti-shake movable part 21 moves along the X-axis direction under the combined drive of the first piezoelectric actuator 221 and the second piezoelectric actuator 222. In another example of this application, the first piezoelectric actuator 221 generates deformation along the width direction, and the second piezoelectric actuator 222 generates deformation along the length direction. The anti-shake movable part 21 moves along the X-axis direction under the combined drive of the first piezoelectric actuator 221 and the second piezoelectric actuator 222. Driven by the piezoelectric actuators 222, the device moves along the Y-axis. In another example of this application, the first piezoelectric actuator 221 first deforms along the length direction and then deforms along the width direction; the second piezoelectric actuator 222 first deforms along the width direction and then deforms along the length direction. Driven by the first and second piezoelectric actuators 221 and 222, the anti-shake movable part 21 first moves along the X-axis and then along the Y-axis, meaning the anti-shake movable part 21 can move within the XOY plane. In other words, in this application, the first and second piezoelectric actuators 221 and 222 can cooperate to drive the anti-shake movable part 21 to translate along both the X and Y axes.

[0155] In summary, the camera module based on the embodiments of this application is explained, wherein the camera module uses a novel piezoelectric actuator as a driving element to not only provide a sufficiently large driving force, but also to provide driving performance with higher precision and longer stroke, so as to meet the optical performance adjustment requirements of the camera module, such as the requirement for optical image stabilization.

[0156] Indicative image stabilization drive components

[0157] According to another aspect of this application, a stabilization drive assembly 20 is also provided, comprising: a stabilization fixing portion 23 having a receiving cavity 230; a stabilization movable portion 21 suspended within the receiving cavity 230 of the stabilization fixing portion 23, dividing the receiving cavity 230 into an upper portion 2301 and a lower portion 2302 by the stabilization movable portion 21, wherein the stabilization movable portion 21 is adapted to mount a photosensitive component 30 thereon; and a stabilization drive portion 22 disposed in the lower portion 2302 of the receiving cavity 230, wherein the stabilization drive portion 22 includes a first piezoelectric actuator 221 and a second piezoelectric actuator 222 frictionally coupled to the stabilization movable portion 21, the first piezoelectric actuator 221 being a first piezoelectric actuator 221 being a second piezoelectric actuator 222 being a second piezoelectric actuator 222 being a third piezoelectric actuator 221 being a third piezoelectric actuator 2 ... The electric actuator 221 and the second piezoelectric actuator 222 are adapted to actuate the anti-shake movable part 21 to move in the XOY plane defined by the X and Y axes or to rotate in the XOY plane about a Z axis perpendicular to the X and Y axes; and a guide element 251 is clampedly disposed in the upper part 2301 of the receiving cavity 230, wherein the clamped guide element 251 generates a pre-force that forces the anti-shake movable part 21 to abut against the first piezoelectric actuator 221 and the second piezoelectric actuator 222 so that the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are frictionally coupled to the anti-shake movable part 21 by the pre-force.

[0158] In the image stabilization drive assembly 20 according to this application, the image stabilization fixing part 23 includes a base 232 and an upper cover 231 that engages with the base 232, the upper part 2301 of the receiving cavity 230 is formed between the upper cover 231 and the image stabilization movable part 21, and the lower part 2302 of the receiving cavity 230 is formed between the base 232 and the image stabilization movable part 21.

[0159] In the anti-shake drive assembly 20 according to this application, there is a gap between the anti-shake movable part 21 and the base 232, and a gap between the anti-shake movable part 21 and the upper cover 231, in such a way that the anti-shake movable part 21 is suspended in the receiving cavity 230 of the anti-shake fixing part 23.

[0160] In the anti-shake drive assembly 20 according to this application, the anti-shake movable part 21 is stably clamped between the first piezoelectric actuator 221 and the guide element 251 and between the second piezoelectric actuator 222 and the guide element 251.

[0161] In the anti-shake drive assembly 20 according to this application, the anti-shake movable part 21 includes a carrier body 211 and a carrier extension arm 212 extending outward from the carrier body 211, wherein the guide element 251 is clamped between the lower surface of the upper cover 231 and the upper surface of the carrier extension arm 212, and the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are frictionally coupled to the lower surface of the carrier extension arm 212.

[0162] In the anti-shake drive assembly 20 according to this application, the anti-shake movable part 21 further includes a friction plate 213 formed on the lower surface of the carrier extension arm 212, and the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are frictionally coupled to the friction plate 213.

[0163] In the image stabilization drive assembly 20 according to this application, the image stabilization drive assembly 20 further includes a first guide groove 252 recessed in the upper surface of the carrier extension arm 212, and a guide element 251 is received in the first guide groove 252. The guide element 251 and the first guide groove 252 form a guide device 25 for guiding the movement of the image stabilization movable part 21 and the photosensitive assembly 30. At least a portion of the guide element 251 protrudes from the groove and abuts against the lower surface of the upper cover 231, thereby clamping the guide element 251 between the lower surface of the upper cover 231 and the upper surface of the carrier extension arm 212.

[0164] In the anti-shake drive assembly 20 according to this application, the guiding element 251 is a guiding element 251.

[0165] In the anti-shake drive assembly 20 according to this application, the guide element 251 is a slider.

[0166] In the anti-shake drive assembly 20 according to this application, the first guide groove 252 extends along the direction set by the X-axis, and the guide device 25 further includes a second guide groove recessed in the lower surface of the upper cover 231, the second guide groove extending along the direction set by the Y-axis.

[0167] In the anti-shake drive assembly 20 according to this application, the first guide groove 252 extends along the direction set by the Y-axis, and the guide device 25 further includes a second guide groove recessed in the lower surface of the upper cover 231, the second guide groove extending along the direction set by the X-axis.

[0168] In the anti-shake drive assembly 20 according to this application, the first guide segment and the second guide groove are arranged opposite to each other and intersect each other.

[0169] In the anti-shake drive assembly 20 according to this application, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 have the same height dimension.

[0170] In the anti-shake drive assembly 20 according to this application, the height dimensions of the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are 0.7mm-0.9mm.

[0171] In the anti-shake drive assembly 20 according to this application, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are traveling wave piezoelectric actuators. The first piezoelectric actuator 221 includes a first piezoelectric ceramic plate 2211 and a first friction drive portion 2212 protruding from the first piezoelectric ceramic plate 2211. The first piezoelectric ceramic plate 2211 is adapted to deform after being electrically driven to drive the first friction drive portion 2212 to perform a unidirectional yaw reciprocating motion. The second piezoelectric actuator 222 includes a second piezoelectric ceramic plate 2221 and a second friction drive portion 2222 protruding from the second piezoelectric ceramic plate 2221. The second piezoelectric ceramic plate 2221 is adapted to deform after being electrically driven to drive the second friction drive portion 2222 to perform a unidirectional yaw reciprocating motion.

[0172] In the anti-shake drive assembly 20 according to this application, the first piezoelectric ceramic plate 2211 is disposed on the anti-shake fixing part 23, the first friction drive part 2212 is frictionally coupled to the anti-shake movable part 21, the second piezoelectric ceramic plate 2221 is disposed on the anti-shake fixing part 23, and the second friction drive part 2222 is frictionally coupled to the anti-shake movable part 21.

[0173] In the image stabilization drive assembly 20 according to this application, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are arranged parallel to each other on opposite sides of the photosensitive assembly 30.

[0174] In the image stabilization drive assembly 20 according to this application, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are arranged symmetrically on opposite sides of the photosensitive assembly 30 with respect to the X-axis or the Y-axis as the axis of symmetry.

[0175] In the image stabilization drive assembly 20 according to this application, the first piezoelectric actuator 221 is adapted to deform along the direction set by the X-axis to actuate the image stabilization movable part 21 and the photosensitive component 30 to move along the direction set by the X-axis, and the second piezoelectric actuator 222 is adapted to deform along the direction set by the X-axis to actuate the image stabilization movable part 21 and the photosensitive component 30 to move along the direction set by the X-axis, so that the image stabilization movable part 21 and the photosensitive component 30 are actuated along the direction set by the X-axis by the first piezoelectric actuator 221 and the second piezoelectric actuator 222;

[0176] The first piezoelectric actuator 221 is adapted to deform along the direction set by the Y-axis to actuate the image stabilization movable part 21 and the photosensitive component 30 to move along the direction set by the Y-axis, and the second piezoelectric actuator 222 is adapted to deform along the direction set by the Y-axis to actuate the image stabilization movable part 21 and the photosensitive component 30 to move along the direction set by the Y-axis, so that the image stabilization movable part 21 and the photosensitive component 30 are actuated along the direction set by the Y-axis by the first piezoelectric actuator 221 and the second piezoelectric actuator 222;

[0177] The first piezoelectric actuator 221 is adapted to deform along a first direction set by the X-axis to actuate the image stabilization movable part 21 and the photosensitive component 30 to move along the first direction set by the X-axis, and the second piezoelectric actuator 222 is adapted to deform along a second direction set by the X-axis opposite to the first direction to actuate the image stabilization movable part 21 and the photosensitive component 30 to move along the second direction set by the X-axis, so that the photosensitive component 30 is rotated about the Z-axis in the XOY plane by the first piezoelectric actuator 221 and the second piezoelectric actuator 222;

[0178] The first piezoelectric actuator 221 is adapted to deform along a first direction set by the Y-axis to actuate the image stabilization movable part 21 and the photosensitive component 30 to move along the first direction set by the Y-axis, and the second piezoelectric actuator 222 is adapted to deform along a second direction set by the Y-axis opposite to the first direction to actuate the image stabilization movable part 21 and the photosensitive component 30 to move along the second direction set by the Y-axis, so that the photosensitive component 30 is rotated about the Z-axis in the XOY plane by the first piezoelectric actuator 221 and the second piezoelectric actuator 222.

[0179] In the image stabilization drive assembly 20 according to this application, the image stabilization drive assembly 20 further includes a drive substrate 26 disposed between the image stabilization movable part 21 and the substrate 232. The drive substrate 26 includes at least one conductive end and a connection end 263 extending outward from the conductive end. The first piezoelectric actuator 221 and the second piezoelectric actuator 222 are electrically connected to the at least one electrical connection end 263.

[0180] In the anti-shake drive assembly 20 according to this application, the at least one conductive end includes a first conductive end 261 and a second conductive end 262, the first piezoelectric actuator 221 is electrically connected to the first conductive end 261, and the second piezoelectric actuator 222 is electrically connected to the second conductive end 262.

[0181] In the image stabilization drive assembly 20 according to this application, the image stabilization movable part 21 has a slot formed in the side wall of the carrier body 211, the slot being configured to allow the circuit board 31 of the photosensitive assembly 30 to extend out of the mounting slot 2110 from the slot.

[0182] In the image stabilization drive assembly 20 according to this application, the substrate 232 has an opening formed in its sidewall, wherein the connection end 263 extends outward from the at least one conductive end and passes through the opening.

[0183] In the anti-shake drive assembly 20 according to this application, the opening and the slot have a height difference.

[0184] In the image stabilization drive assembly 20 according to this application, the image stabilization drive assembly 20 further includes a pre-pressure device 24 disposed between the image stabilization drive part 22 and the image stabilization fixing part 23, so as to force the image stabilization drive part 22 to be frictionally coupled to the image stabilization movable part 21 by the pre-pressure provided by the pre-pressure device 24.

[0185] In the anti-shake drive assembly 20 according to this application, the pre-pressure device 24 includes a first elastic element 241 disposed between the substrate 232 and the first piezoelectric ceramic plate 2211 of the first piezoelectric actuator 221, so as to generate the pre-pressure by the elastic force of the first elastic element 241 itself, thereby forcing the first friction drive portion 2212 of the first piezoelectric actuator 221 to abut against the friction plate 213, so that the first friction drive portion 2212 of the first piezoelectric actuator 221 is frictionally coupled to the substrate 232. The friction plate 213 is described above; the pre-pressure device 24 further includes a second elastic element 242 disposed between the substrate 232 and the second piezoelectric ceramic plate 2221 of the second piezoelectric actuator 222, so that the pre-pressure generated by the elastic force of the second elastic element 242 itself forces the second friction drive portion 2222 of the second piezoelectric actuator 222 to abut against the friction plate 213, thereby making the second friction drive portion 2222 of the second piezoelectric actuator 222 frictionally coupled to the friction plate 213.

[0186] In the image stabilization drive assembly 20 according to this application, the thickness of the first elastic element 241 and the second elastic element 242 is 10µm to 50µm.

[0187] In summary, the image stabilization drive assembly 20 based on the embodiments of this application is explained, wherein the guide device 25 and the image stabilization drive part 22 of the image stabilization drive assembly 20 are disposed opposite to each other on both sides of the image stabilization movable part 21, and the guide device 25, the image stabilization movable part 21 and the image stabilization drive part 22 are all clampedly disposed in the receiving cavity 230 formed by the image stabilization fixing part 23. In this way, the guide element 251 of the guide device 25, in addition to guiding the movement of the image stabilization movable part 21, also provides pre-pressure to keep the image stabilization drive part 22 frictionally coupled to the image stabilization movable part 21.

[0188] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and any variations or modifications may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A shake stabilization drive component, characterized in that, include: A shock-absorbing fixing part with a receiving cavity; A movable anti-shake component is suspended within the receiving cavity of the anti-shake fixing part, thereby dividing the receiving cavity into an upper part and a lower part, wherein the movable anti-shake component is adapted to mount a photosensitive component thereon; A vibration damping drive unit is disposed in the lower part of the receiving cavity, wherein the vibration damping drive unit includes a first piezoelectric actuator and a second piezoelectric actuator; and A guide element is clamped and disposed on the upper part of the receiving cavity, wherein the clamped guide element generates a pre-pressure that forces the anti-shake movable part to abut against the first piezoelectric actuator and the second piezoelectric actuator so that the first piezoelectric actuator and the second piezoelectric actuator are frictionally coupled to the anti-shake movable part by the pre-pressure; The first piezoelectric actuator and the second piezoelectric actuator are respectively frictionally coupled to the anti-shake movable part; wherein the first piezoelectric actuator and the second piezoelectric actuator are adapted to deform along the length direction and the width direction, so that only one of the anti-shake movable parts can perform X-axis direction movement anti-shake, Y-axis direction movement anti-shake, and Z-axis direction rotational anti-shake in the XOY plane under the drive of the first piezoelectric actuator and the second piezoelectric actuator.

2. The image stabilization drive component according to claim 1, wherein, The anti-shake fixing part includes a base and an upper cover that engages with the base. The upper part of the receiving cavity is formed between the upper cover and the anti-shake movable part, and the lower part of the receiving cavity is formed between the base and the anti-shake movable part.

3. The image stabilization drive component according to claim 2, wherein, There is a gap between the anti-shake movable part and the base, and there is a gap between the anti-shake movable part and the top cover. In this way, the anti-shake movable part is suspended in the receiving cavity of the anti-shake fixed part.

4. The image stabilization drive component according to claim 3, wherein, The anti-shake movable part is stably clamped between the first piezoelectric actuator and the guiding element, and between the second piezoelectric actuator and the guiding element.

5. The image stabilization drive assembly according to claim 4, wherein, The anti-shake movable part includes a carrier body and a carrier extension arm extending outward from the carrier body, wherein the guiding element is clamped between the lower surface of the upper cover and the upper surface of the carrier extension arm, and the first piezoelectric actuator and the second piezoelectric actuator are frictionally coupled to the lower surface of the carrier extension arm.

6. The image stabilization drive assembly according to claim 5, wherein, The anti-shake movable part further includes a friction plate formed on the lower surface of the carrier extension arm, and the first piezoelectric actuator and the second piezoelectric actuator are frictionally coupled to the friction plate.

7. The image stabilization drive assembly according to claim 6, further comprising a first guide groove recessed in the upper surface of the carrier extension arm, the guide element being received within the first guide groove, the guide element and the first guide groove forming a guide device for guiding the image stabilization movable part and the photosensitive assembly to move, wherein, At least a portion of the guiding element protrudes from the first guiding groove and abuts against the lower surface of the upper cover, thereby clamping the guiding element between the lower surface of the upper cover and the upper surface of the carrier extension arm.

8. The image stabilization drive assembly according to claim 7, wherein, The guiding element is a ball bearing.

9. The image stabilization drive assembly according to claim 7, wherein, The guiding element is a slider.

10. The image stabilization drive assembly according to claim 8, wherein, The first guide groove extends along the direction set by the X-axis, and the guide device further includes a second guide groove recessed in the lower surface of the upper cover, the second guide groove extending along the direction set by the Y-axis.

11. The image stabilization drive assembly according to claim 8, wherein, The first guide groove extends along the direction set by the Y-axis, and the guide device further includes a second guide groove recessed in the lower surface of the upper cover, the second guide groove extending along the direction set by the X-axis.

12. The image stabilization drive assembly according to claim 10 or 11, wherein, The first guide groove and the second guide groove are arranged opposite to each other and intersect each other.

13. The image stabilization drive assembly according to claim 6, wherein, The first piezoelectric actuator and the second piezoelectric actuator have the same height dimension.

14. The image stabilization drive assembly according to claim 13, wherein, The height of the first piezoelectric actuator and the second piezoelectric actuator is 0.7mm-0.9mm.

15. The image stabilization drive assembly according to claim 13, wherein, The first piezoelectric actuator and the second piezoelectric actuator are traveling wave piezoelectric actuators. The first piezoelectric actuator includes a first piezoelectric ceramic plate and a first friction drive portion protruding from the first piezoelectric ceramic plate. The first piezoelectric ceramic plate is adapted to deform after being electrically driven to drive the first friction drive portion to perform a unidirectional oscillating reciprocating motion. The second piezoelectric actuator includes a second piezoelectric ceramic plate and a second friction drive portion protruding from the second piezoelectric ceramic plate. The second piezoelectric ceramic plate is adapted to deform after being electrically driven to drive the second friction drive portion to perform a unidirectional oscillating reciprocating motion.

16. The image stabilization drive assembly according to claim 15, wherein, The first piezoelectric ceramic plate is disposed on the anti-shake fixing part, the first friction drive part is frictionally coupled to the anti-shake movable part, the second piezoelectric ceramic plate is disposed on the anti-shake fixing part, and the second friction drive part is frictionally coupled to the anti-shake movable part.

17. The image stabilization drive assembly according to claim 13, wherein, The first piezoelectric actuator and the second piezoelectric actuator are arranged in parallel on opposite sides of the photosensitive component.

18. The image stabilization drive assembly according to claim 17, wherein, The first piezoelectric actuator and the second piezoelectric actuator are arranged symmetrically on opposite sides of the photosensitive component with respect to the X-axis or the Y-axis as the axis of symmetry.

19. The image stabilization drive assembly according to claim 18, wherein, The first piezoelectric actuator is adapted to deform along the direction set by the X-axis to actuate the image stabilization movable part and the photosensitive component to move along the direction set by the X-axis, and the second piezoelectric actuator is adapted to deform along the direction set by the X-axis to actuate the image stabilization movable part and the photosensitive component to move along the direction set by the X-axis, so that the image stabilization movable part and the photosensitive component are actuated along the direction set by the X-axis by the first piezoelectric actuator and the second piezoelectric actuator; The first piezoelectric actuator is adapted to deform along the direction set by the Y-axis to actuate the image stabilization movable part and the photosensitive component to move along the direction set by the Y-axis, and the second piezoelectric actuator is adapted to deform along the direction set by the Y-axis to actuate the image stabilization movable part and the photosensitive component to move along the direction set by the Y-axis, so that the image stabilization movable part and the photosensitive component are actuated along the direction set by the Y-axis by the first piezoelectric actuator and the second piezoelectric actuator; The first piezoelectric actuator is adapted to deform along a first direction set by the X-axis to actuate the image stabilization movable part and the photosensitive component to move along the first direction set by the X-axis, and the second piezoelectric actuator is adapted to deform along a second direction set by the X-axis opposite to the first direction to actuate the image stabilization movable part and the photosensitive component to move along the second direction set by the X-axis, so that the photosensitive component is actuated to rotate about the Z-axis in the XOY plane by the first piezoelectric actuator and the second piezoelectric actuator; The first piezoelectric actuator is adapted to deform along a first direction set by the Y-axis to actuate the image stabilization movable part and the photosensitive component to move along the first direction set by the Y-axis, and the second piezoelectric actuator is adapted to deform along a second direction set by the Y-axis opposite to the first direction to actuate the image stabilization movable part and the photosensitive component to move along the second direction set by the Y-axis, so that the photosensitive component is actuated to rotate about the Z-axis in the XOY plane by the first piezoelectric actuator and the second piezoelectric actuator.

20. The anti-shake driving assembly according to claim 5, further comprising a driving substrate disposed between the anti-shake movable part and the substrate, the driving substrate comprising at least one conductive end and a connecting end extending outward from the conductive end, the first piezoelectric actuator and the second piezoelectric actuator being electrically connected to the connecting end.

21. The image stabilization drive assembly according to claim 20, wherein, The at least one conductive end includes a first conductive end and a second conductive end, the first piezoelectric actuator is electrically connected to the first conductive end, and the second piezoelectric actuator is electrically connected to the second conductive end.

22. The image stabilization drive assembly according to claim 21, wherein, The carrier body has a mounting groove lower than the carrier extension arm; the anti-shake movable part has a slot formed in the side wall of the carrier body, the slot being configured to allow the circuit board of the photosensitive component to extend out of the mounting groove from the slot.

23. The image stabilization drive assembly according to claim 22, wherein, The substrate has an opening formed in its sidewall, wherein the at least one conductive end of the connection terminal extends outward and passes through the opening.

24. The image stabilization drive assembly according to claim 23, wherein, The opening and the slot have a height difference.

25. The anti-shake drive assembly according to claim 5, further comprising a pre-pressure device disposed between the anti-shake drive portion and the anti-shake fixed portion, so as to force the anti-shake drive portion to be frictionally coupled to the anti-shake movable portion by the pre-pressure provided by the pre-pressure device.

26. The image stabilization drive assembly according to claim 25, wherein, The anti-shake movable part further includes a friction plate formed on the lower surface of the carrier extension arm; the pre-pressure device includes a first elastic element disposed between the substrate and the first piezoelectric ceramic plate of the first piezoelectric actuator, so as to generate the pre-pressure by the elastic force of the first elastic element itself to force the first friction drive part of the first piezoelectric actuator to abut against the friction plate, thereby making the first friction drive part of the first piezoelectric actuator frictionally coupled to the friction plate; the pre-pressure device further includes a second elastic element disposed between the substrate and the second piezoelectric ceramic plate of the second piezoelectric actuator, so as to force the second friction drive part of the second piezoelectric actuator to abut against the friction plate by the pre-pressure generated by the elastic force of the second elastic element itself, thereby making the second friction drive part of the second piezoelectric actuator frictionally coupled to the friction plate.

27. The image stabilization drive assembly according to claim 26, wherein, The thickness of the first elastic element and the second elastic element is 10µm to 50µm.

28. A camera module, characterized in that, include: Optical lens; A photosensitive assembly includes a circuit board and a photosensitive element electrically connected to the circuit board, wherein the optical lens is held in the photosensitive path of the photosensitive element; and The image stabilization drive assembly as described in any one of claims 1 to 27, wherein the photosensitive component is mounted on the image stabilization movable part of the image stabilization drive assembly.

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