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, an anti-shake movable part for mounting a photosensitive assembly thereon, and an anti-shake driving part for driving the anti-shake movable part to perform optical anti-shake. The anti-shake driving part comprises a first piezoelectric actuator and a second piezoelectric actuator frictionally coupled to the anti-shake movable part, the first piezoelectric actuator and the second piezoelectric actuator are arranged in parallel to each other on opposite sides of the photosensitive assembly, and the first piezoelectric actuator and the second piezoelectric actuator are adapted to act on the anti-shake movable part and the photosensitive assembly to move in an XOY plane set by X and Y axes or rotate in the XOY plane around a Z axis perpendicular to the X and Y axes. That is, the anti-shake driving assembly can realize optical anti-shake of the camera module in multiple directions through the anti-shake movable part cooperating with the anti-shake driving part.

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, wherein the stabilization drive component enables optical stabilization of the camera module in multiple directions through a stabilization drive unit. 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] 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.

[0011] To achieve at least one of the above advantages, this application provides a stabilization drive component, which includes:

[0012] Image stabilization fixing part;

[0013] A movable image stabilization unit, wherein a photosensitive component including a photosensitive chip is adapted to be movably mounted on the movable image stabilization unit; and

[0014] A shake-proof drive unit is disposed between the shake-proof fixed part and the shake-proof movable part, the shake-proof drive unit including a first piezoelectric actuator and a second piezoelectric actuator that are frictionally coupled to the shake-proof movable part;

[0015] The first piezoelectric actuator and the second piezoelectric actuator are arranged parallel to each other on opposite sides of the photosensitive component, and the first piezoelectric actuator and the second piezoelectric actuator are adapted to actuate the anti-shake movable part and the photosensitive component to move in the XOY plane set by the X-axis and Y-axis or rotate in the XOY plane about the Z-axis perpendicular to the X-axis and the Y-axis.

[0016] In the image stabilization drive assembly according to this application, the first piezoelectric actuator and the second piezoelectric actuator are symmetrically arranged 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.

[0017] 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.

[0018] 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;

[0019] 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;

[0020] 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;

[0021] 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.

[0022] In the anti-shake drive assembly according to this application, the first piezoelectric actuator and the second piezoelectric actuator have a rectangular structure having two opposing long sides along the length direction and two opposing short sides along the width direction.

[0023] In the anti-shake drive assembly according to this application, the length direction of the first piezoelectric actuator and the second piezoelectric actuator is the X-axis direction, and the short side direction of the first piezoelectric actuator and the second piezoelectric actuator is the Y-axis direction.

[0024] In the anti-shake drive assembly according to this application, the length direction of the first piezoelectric actuator and the second piezoelectric actuator is the Y-axis direction, and the short side direction of the first piezoelectric actuator and the second piezoelectric actuator is the X-axis direction.

[0025] In the anti-shake drive assembly according to this application, the anti-shake movable part is stably supported on the first friction drive part of the first piezoelectric actuator and the second friction drive part of the second piezoelectric actuator.

[0026] 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.

[0027] In the anti-shake drive assembly according to this application, the first piezoelectric actuator and the second piezoelectric actuator have the same height dimension.

[0028] 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.

[0029] In the anti-shake drive assembly according to this application, the anti-shake fixing part has a receiving cavity, and the anti-shake movable part is suspended in the receiving cavity of the anti-shake fixing part.

[0030] In the image stabilization drive assembly according to this application, the image stabilization fixing part includes a base and an upper cover that engages with the base, and the receiving cavity is formed between the upper cover and the base.

[0031] 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.

[0032] 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 a first friction drive part of the first piezoelectric actuator and a second friction drive part of the second piezoelectric actuator are frictionally coupled to the lower surface of the carrier extension arm.

[0033] In the image stabilization drive assembly according to this application, the carrier body has a mounting groove lower than the carrier extension arm, wherein the photosensitive component is adapted to be mounted in the mounting groove.

[0034] In the anti-shake drive assembly according to this application, there is an accommodating space between the carrier extension arm and the substrate, and the first piezoelectric actuator and the second piezoelectric actuator are housed within the accommodating space.

[0035] 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 friction drive part of the first piezoelectric actuator and the second friction drive part of the second piezoelectric actuator are frictionally coupled to the friction plate.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] In the image stabilization drive assembly according to this application, the substrate has an opening formed in its sidewall, wherein the connection end extends outward from the at least one conductive end and passes through the opening.

[0040] In the anti-shake drive assembly according to this application, the opening and the slot have a height difference.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] In the anti-shake drive assembly according to this application, the anti-shake drive assembly further includes a guide device disposed between the upper surface of the carrier extension arm and the upper cover, the guide device being adapted to guide the anti-shake movable part to move within the XOY plane defined by the X-axis and the Y-axis.

[0045] According to another aspect of this application, a camera module is also provided, comprising:

[0046] Optical lens;

[0047] 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

[0048] 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.

[0049] The further objectives and advantages of this application will become fully apparent from the following description and accompanying drawings.

[0050] 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

[0051] 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.

[0052] Figure 1 The illustration shows a schematic diagram of a camera module according to an embodiment of this application.

[0053] Figure 2 The illustration shows a schematic diagram of a modified embodiment of the camera module according to an embodiment of this application.

[0054] Figure 3 The illustration shows a schematic diagram of another modified embodiment of the camera module according to an embodiment of this application.

[0055] Figure 4 The illustration shows a schematic diagram of the photosensitive component of the camera module according to an embodiment of this application.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] Figure 10 The figure shows a schematic diagram of the modified operation of the piezoelectric actuator according to an embodiment of the present application.

[0062] Figure 11 The figure shows a half-sectional schematic diagram of the anti-shake drive component according to an embodiment of the present application.

[0063] Figure 12 Another perspective view of the anti-shake drive component according to an embodiment of this application is shown.

[0064] Figure 13 The illustration shows yet another perspective view of the anti-shake drive component according to an embodiment of this application.

[0065] 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.

[0066] 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. Detailed Implementation

[0067] 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.

[0068] Exemplary camera module

[0069] like Figures 1 to 15 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.

[0070] Accordingly, in this embodiment, the image stabilization drive assembly 20 has a mounting groove located in its central region. The photosensitive component 30 is mounted within the image stabilization drive assembly 20 and housed within the mounting groove. Thus, when the image stabilization drive assembly 20 is driven, it can carry the photosensitive component 30 to move 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 mounted on the image stabilization drive assembly 20 and fixed to its top surface, with the optical lens 10 positioned on the light-sensing path of the photosensitive component 30. This allows the photosensitive component 30 to receive light projected from the optical lens 10 for imaging.

[0071] More specifically, such as Figures 1 to 3As shown, the optical lens 10, which is held in the light-sensing path of the photosensitive component 30 to collect external imaging light, 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.

[0072] 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.

[0073] 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.

[0074] It is worth mentioning that, in some embodiments of this specific example, the lens driving part 14 further includes a lens focusing part, 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 part 14 may also include a lens image stabilization part, 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 part 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 part 14 may only include the lens focusing part or the lens image stabilization part; the lens driving part 14 may also include both the lens focusing part and the lens image stabilization part, thereby enabling the lens driving part 14 to achieve both lens focusing and lens image stabilization functions.

[0075] like Figure 4 As shown, the photosensitive assembly 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. The base 34 is disposed on the circuit board 31 and located around the photosensitive chip 32. The filter element 35 is held in 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.

[0076] In one example of this application, the photosensitive chip 32 is mounted on the upper surface of the circuit board 31 and electrically connected to the circuit board 31 by 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.

[0077] 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.

[0078] In this embodiment, the filter element 35 is held on the light-sensitive 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 light-sensitive area of ​​the photosensitive chip 32, thereby holding the filter element 35 on the light-sensitive path of the photosensitive chip 32. It is worth mentioning that in other embodiments 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 35 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 installed 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.

[0079] 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.).

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] like Figures 5 to 15As shown, 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 the image stabilization drive part 22 is frictionally coupled to the image stabilization movable part 21 so as to drive the image stabilization movable part 21 to move relative to the image stabilization fixed part 23 by 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.

[0086] Specifically, in this embodiment, the photosensitive component 30 is linkedly mounted to 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 linked 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 a manner that 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.

[0087] 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.

[0088] Specifically, in this embodiment, the image stabilization fixing part 23 has a receiving cavity, and the image stabilization movable part 21 and the image stabilization driving part 22 are received within the receiving cavity of the image stabilization fixing part 23. That is, in this embodiment, the image stabilization fixing part 23 can accommodate the image stabilization movable part 21 and the image stabilization driving part 22 therein. Furthermore, the top surface of the image stabilization fixing part 23 is used to mount the optical lens 10, so that the optical lens 10 can be positioned on the light-sensing path of the photosensitive component 30 via the image stabilization fixing part 23. The pre-pressure device 24 is disposed between the image stabilization fixing part 23 and the image stabilization driving part 22, and the pre-pressure device 24 maintains the image stabilization driving part 22 and the image stabilization movable part 21 in a frictional coupling by the pre-pressure it generates. The guiding device 25 is disposed between the movable anti-shake part 21 and the fixed anti-shake part 23. The movable anti-shake part 21 is suspended in the fixed anti-shake part 23 by the guiding device 25, and is used to guide the movement of the movable anti-shake part 21. The driving substrate 26 is electrically connected to the anti-shake driving part 22, and is used to realize the circuit conduction of the anti-shake driving assembly 20.

[0089] 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.

[0090] 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.

[0091] 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 for mounting the photosensitive component 30 therein, wherein the photosensitive component 30 is fixed in the mounting groove so that the photosensitive component 30 can move under the drive of the image stabilization movable part 21.

[0092] 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.

[0093] like Figure 5 and Figure 6 As 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.

[0094] like Figure 5 and Figure 6As 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 have a separate structure. For example, the friction plate 213 is a separate component and 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.

[0095] 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.

[0096] like Figures 5 to 7 As 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 is formed between the upper cover 231 and the base 232. The receiving cavity 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.

[0097] 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.

[0098] 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 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.

[0099] In other words, in this embodiment, the image stabilization fixing part 23 has a receiving cavity, and the image stabilization movable part 21 is suspended within the receiving cavity of the image stabilization fixing part 23. Specifically, the image stabilization fixing part 23 includes a base 232 and an upper cover 231 that engages with the base 232, and the receiving cavity is formed between the upper cover 231 and the base 232. Furthermore, there is a gap between the image stabilization movable part 21 and the base 232, and a gap between the image stabilization movable part 21 and the upper cover 231, thereby suspending the image stabilization movable part 21 within the receiving cavity of the image stabilization fixing part 23.

[0100] It should be noted that in this specific example, 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. This gap can be used to accommodate the guide device 25, so that the anti-shake movable part 21 can be supported by the upper cover 231 of the anti-shake fixed part 23 through the guide device 25. There is also a gap between the bottom surface of the base 232 and the bottom surface of the anti-shake movable part 21, that is, the anti-shake movable part 21 does not directly contact the upper cover 231 and the base 232 of the anti-shake fixed part 23, so as to reduce the friction generated by the anti-shake movable part 21 during movement.

[0101] Furthermore, such as Figures 8 to 14As shown in this embodiment, 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. After being installed on the anti-shake fixed part 23, the anti-shake driving part 22 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 driving part 22 is disposed on the side of the carrier body 211 of the anti-shake movable part 21, that is, the anti-shake driving part 22 is disposed within the accommodating space formed by the carrier extension arm 212 and the base 232 to avoid increasing the height of the anti-shake driving assembly 20.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] Furthermore, in this embodiment, 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.

[0106] 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.

[0107] like Figure 9As 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 produces two surface shape changes, 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.

[0108] 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.

[0109] 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 be selectively configured to change its surface shape along its length or width direction. When the piezoelectric actuator is positioned 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 positioned 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 movements, and can also achieve Z-axis rotational movement by utilizing the cooperation of the first piezoelectric actuator 221 and the second piezoelectric actuator 222. 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.

[0110] 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.

[0111] 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.

[0112] 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 greater than or equal to the driving stroke of the first piezoelectric actuator 221.

[0113] 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.

[0114] 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 greater than or equal to the driving stroke of the first piezoelectric actuator 221.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] 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.).

[0129] 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.

[0130] 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.

[0131] In a specific example of this application, the guiding device 25 includes a groove 252 disposed in the anti-shake movable part 21 and a ball bearing 251 disposed in the 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 ball bearing 251 is placed in the groove 252, the movement trajectory of the ball bearing 251 is restricted within the groove 252. The ball bearing 251 can move within the groove 252 along a plane perpendicular to the optical axis to provide guidance for the movement of the anti-shake movable part 21.

[0132] Specifically, in this example, the groove 252 is recessed into the carrier extension arm 212 of the anti-shake movable part 21, and the opening of the 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 ball bearing 251 is a planar structure, and the portion of the carrier extension arm 212 facing the ball bearing 251 is a groove 252 structure. The ball bearing 251 is contained within the groove 252 of the carrier extension arm 212, and can only move within the groove 252. The groove 252 limits the movement of the ball bearing 251, preventing it from leaving its range of motion. In this application, the ball bearing 251 is made of ceramic. Specifically, in this particular example, the depth of the groove 252 is less than or equal to the diameter of the ball 251, so that at least a portion of the ball 251 can be exposed on the top surface of the groove 252, so that the ball 251 can make frictional contact with the carrier extension arm 212 of the anti-shake movable part 21.

[0133] 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.

[0134] It is worth mentioning that in other examples of this application, the guiding device 25 can also be a slider-groove structure, and this application does not limit this. Furthermore, in other examples of this application, a directional track can be provided between the upper cover 231 and the upper surface of the anti-shake movable part 21, with the ball bearing 251 disposed within the track. The movement trajectory of the ball bearing 251 is restricted within the track, thus providing a guiding function during the movement of the photosensitive component 30. Moreover, since the ball bearing 251 can use rolling friction instead of sliding friction, the friction between the anti-shake movable part 21 and the upper cover 231 can be further reduced.

[0135] For example, in a specific example of this application, a track along the x-axis can be provided on the bottom surface of the upper cover 231, and a track along the y-axis can be provided on the upper surface of the carrier extension arm 212 (the bottom and upper surfaces refer to the direction along the optical axis, from the photosensitive chip 32 to the optical lens 10). The x-axis track and the y-axis track are arranged opposite each other to form a cross-shaped receiving cavity to accommodate the ball bearing 251. Preferably, the number of ball bearings 251 and receiving cavities is 4, so that the image stabilization movable part 21 can remain stable. When performing optical image stabilization, the ball bearings 251 and the track serve as a guiding mechanism, which can provide a larger OIS travel for the photosensitive component 30. Of course, in other embodiments of this application, both the x-axis track and the y-axis track 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 track 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. That is, a track with a y-axis direction is provided on the upper cover 231 at a position opposite to the track with the x-axis direction on the carrier extension arm 212, and a track with a x-axis direction is provided on the upper cover 231 at a position opposite to the track with the y-axis direction on the carrier extension arm 212, so as to avoid interference.

[0136] It is worth mentioning that the guide device 25 is disposed between the anti-shake movable part 21 and the upper cover 231, and the anti-shake drive part 22 is disposed between the anti-shake movable part 21 and the base 232. Furthermore, the guide device 25 is disposed above the anti-shake movable part 21, and the anti-shake drive part 22 is disposed below the anti-shake movable part 21. In other words, the anti-shake movable part 21 is held by the guide device 25 and the anti-shake drive part 22 within the accommodating space formed by the upper cover 231 and the base 232.

[0137] It should be noted that in this embodiment, the ball bearing 251 of the guide device 25 is clamped between the anti-shake movable part 21 and the upper cover 231 of the anti-shake fixed part 23. Therefore, the ball bearing 251 can also provide a pre-pressure that causes the anti-shake movable part 21 to move downward so that the anti-shake movable part 21 is frictionally coupled to the anti-shake drive part 22. That is, in this embodiment, the ball bearing 251 of the guide device 25 also substantially functions as a pre-pressure device 24. In other words, the ball bearing 251 can both serve as the guide device 25 to provide support for the anti-shake movable part 21 and as a pre-pressure device 24 to provide the necessary pre-pressure for the anti-shake drive part 22.

[0138] Specifically, in this embodiment, the first piezoelectric ceramic plate 2211 and the second piezoelectric ceramic plate 2221 are respectively fixed parallel to each other on the inner bottom surface of the substrate 232. 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 ball bearing 251 is disposed between the anti-shake movable part 21 and the upper cover 231, that is, the ball bearing 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: top cover 231, ball bearing 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 ball bearing 251 and the first piezoelectric actuator 221 and the second piezoelectric actuator 222. The ball bearing 251 can generate a downward preload, which allows 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.

[0139] In this application, the first friction drive unit 2212 and the second friction drive unit 2222 respectively rub against the opposite sides of the carrier extension arm 212, and the ball bearings 251 rub against 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 ball bearings 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 ball bearings 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 ball 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.

[0140] Furthermore, such as Figures 5 to 15 As shown in the embodiment of this application, the driving substrate 26 is disposed between the anti-shake 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.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] In other examples of this application, the positions of the anti-shake drive unit 22 and the guide device 25 can be interchanged. Specifically, the anti-shake drive unit 22 can be positioned between the upper cover 231 and the anti-shake movable part 21, and the guide device 25 can be positioned between the base 232 and the anti-shake movable part 21. The guide device 25 is positioned below the carrier extension arm 212, and the carrier extension arm 212 has a groove 252 with an opening facing the base 232. A ball bearing 251 is disposed within the groove 252, supporting the anti-shake movable part 21 on the base 232. The carrier extension arm 212 is clamped between the ball bearing 251 and the friction drive unit, enabling the anti-shake movable part 21 to achieve XOY plane anti-shake and Z-axis anti-shake under the drive of the anti-shake drive unit 22. Furthermore, the driving substrate 26 is disposed between the upper cover 231 and the piezoelectric ceramic plate, and is used to enable the anti-shake driving unit 22 to be connected to the circuit of the electronic device motherboard.

[0146] 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 15As 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.

[0147] 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.

[0148] 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.

[0149] Indicative image stabilization drive components

[0150] According to another aspect of this application, a stabilization drive assembly is also provided, comprising: a stabilization fixing part 23, a stabilization movable part 21, and a stabilization drive part 22, wherein the stabilization movable part 21 is adapted to mount a photosensitive component 30 thereon, and the stabilization drive part 22 includes a first piezoelectric actuator 221 and a second piezoelectric actuator 222 frictionally coupled to the stabilization movable part 21. Specifically, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are arranged parallel to each other on opposite sides of the photosensitive component 30, and the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are adapted to actuate the stabilization movable part 21 and the photosensitive component 30 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 the Y-axis.

[0151] In one example of the image stabilization drive assembly 20 according to this application, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are symmetrically arranged on opposite sides of the photosensitive assembly 30 with respect to the X-axis or the Y-axis as the axis of symmetry.

[0152] In one example of 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.

[0153] In one example of 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;

[0154] 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;

[0155] 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;

[0156] 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.

[0157] In one example of the anti-shake drive assembly 20 according to this application, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 have a rectangular structure having two opposing long sides along the length direction and two opposing short sides along the width direction.

[0158] In one example of the anti-shake drive assembly 20 according to this application, the length direction of the first piezoelectric actuator 221 and the second piezoelectric actuator 222 is the X-axis direction, and the short side direction of the first piezoelectric actuator 221 and the second piezoelectric actuator 222 is the Y-axis direction.

[0159] In one example of the anti-shake drive assembly 20 according to this application, the length direction of the first piezoelectric actuator 221 and the second piezoelectric actuator 222 is the Y-axis direction, and the short side direction of the first piezoelectric actuator 221 and the second piezoelectric actuator 222 is the X-axis direction.

[0160] In one example of the anti-shake drive assembly 20 according to this application, the anti-shake movable part 21 is smoothly supported on the first friction drive part 2212 of the first piezoelectric actuator 221 and the second friction drive part 2222 of the second piezoelectric actuator 222.

[0161] In one example of 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.

[0162] In one example of the image stabilization drive assembly 20 according to this application, the first piezoelectric actuator 221 and the second piezoelectric actuator 222 have the same height dimension.

[0163] In one example of 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.

[0164] In one example of the image stabilization drive assembly 20 according to this application, the image stabilization fixing part 23 has a receiving cavity, and the image stabilization movable part 21 is suspended in the receiving cavity of the image stabilization fixing part 23.

[0165] In one example of 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, and the receiving cavity is formed between the upper cover 231 and the base 232.

[0166] In one example of 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 top cover 231, in such a way that the anti-shake movable part 21 is suspended in the receiving cavity of the anti-shake fixing part 23.

[0167] In one example of 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 a first friction drive portion 2212 of the first piezoelectric actuator 221 and a second friction drive portion 2222 of the second piezoelectric actuator 222 are frictionally coupled to the lower surface of the carrier extension arm 212.

[0168] In one example of the image stabilization drive assembly 20 according to this application, the carrier body 211 has a mounting groove lower than the carrier extension arm 212, wherein the photosensitive assembly 30 is adapted to be mounted in the mounting groove.

[0169] In one example of the anti-shake drive assembly 20 according to this application, there is an accommodating space between the carrier extension arm 212 and the substrate 232, in which the first piezoelectric actuator 221 and the second piezoelectric actuator 222 are accommodated.

[0170] In one example of 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, wherein the first friction drive part 2212 of the first piezoelectric actuator 221 and the second friction drive part 2222 of the second piezoelectric actuator 222 are frictionally coupled to the friction plate 213.

[0171] In one example of 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.

[0172] In one example of the image stabilization 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.

[0173] In one example of 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 from the slot.

[0174] In one example of 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.

[0175] In one example of the anti-shake drive assembly 20 according to this application, the opening and the slot have a height difference.

[0176] In one example of 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 portion 22 and the image stabilization fixing portion 23, so as to force the image stabilization drive portion 22 to be frictionally coupled to the image stabilization movable portion 21 by the pre-pressure provided by the pre-pressure device 24.

[0177] In one example of 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 to force the first friction drive portion 2212 of the first piezoelectric actuator 221 to abut against the friction plate 213, thereby causing the first friction drive portion 2212 of the first piezoelectric actuator 221 to frictionally contact the friction plate 213. Coupled to the friction plate 213; 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.

[0178] In one example of 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.

[0179] In one example of the anti-shake drive assembly 20 according to this application, the anti-shake 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 being adapted to guide the anti-shake movable part 21 to move within the XOY plane defined by the X-axis and the Y-axis.

[0180] In summary, the image stabilization drive component 20 based on the embodiments of this application is explained, which uses a special piezoelectric actuator as the drive element and only configures one image stabilization movable part 21 to achieve image stabilization of the camera module in the XOY plane.

[0181] 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: Image stabilization fixing part; A movable image stabilization unit, wherein a photosensitive component including a photosensitive chip is adapted to be movably mounted on the movable image stabilization unit; and A shake-proof drive unit is disposed between the shake-proof fixed part and the shake-proof movable part, the shake-proof drive unit including a first piezoelectric actuator and a second piezoelectric actuator that are frictionally coupled to the shake-proof movable part; The first piezoelectric actuator and the second piezoelectric actuator are arranged parallel to each other on opposite sides of the photosensitive component, and the first piezoelectric actuator and the second piezoelectric actuator are adapted to actuate the anti-shake movable part and the photosensitive component to move in the XOY plane set by the X-axis and Y-axis or rotate in the XOY plane about the Z-axis perpendicular to the X-axis and the Y-axis; The first piezoelectric actuator and the second piezoelectric actuator are adapted to deform along the length and width directions, such that only one of the anti-shake movable parts can perform X-axis direction movement anti-shake, Y-axis direction movement anti-shake, and rotational anti-shake about the Z-axis direction 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 first piezoelectric actuator and the second piezoelectric actuator are symmetrically arranged on opposite sides of the photosensitive component with respect to the X-axis or the Y-axis as the axis of symmetry.

3. The image stabilization drive component according to claim 2, 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.

4. The image stabilization drive component according to claim 3, 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.

5. The image stabilization drive assembly according to claim 4, wherein, The first piezoelectric actuator and the second piezoelectric actuator have a rectangular structure, having two opposing long sides along the length direction and two opposing short sides along the width direction.

6. The image stabilization drive assembly according to claim 5, wherein, The length direction of the first piezoelectric actuator and the second piezoelectric actuator is the X-axis direction, and the short side direction of the first piezoelectric actuator and the second piezoelectric actuator is the Y-axis direction.

7. The image stabilization drive assembly according to claim 5, wherein, The length direction of the first piezoelectric actuator and the second piezoelectric actuator is the Y-axis direction, and the short side direction of the first piezoelectric actuator and the second piezoelectric actuator is the X-axis direction.

8. The image stabilization drive assembly according to claim 5, wherein, The anti-shake movable part is stably supported on the first friction drive part of the first piezoelectric actuator and the second friction drive part of the second piezoelectric actuator.

9. The image stabilization drive assembly according to claim 8, 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.

10. The image stabilization drive assembly according to claim 9, wherein, The first piezoelectric actuator and the second piezoelectric actuator have the same height dimension.

11. The image stabilization drive assembly according to claim 10, wherein, The height of the first piezoelectric actuator and the second piezoelectric actuator is 0.7mm-0.9mm.

12. The image stabilization drive assembly according to claim 8, wherein, The anti-shake fixing part has a receiving cavity, and the anti-shake movable part is suspended in the receiving cavity of the anti-shake fixing part.

13. The image stabilization drive assembly according to claim 12, wherein, The anti-shake fixing part includes a base and an upper cover that engages with the base, and the receiving cavity is formed between the upper cover and the base.

14. The image stabilization drive assembly according to claim 13, 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.

15. The image stabilization drive assembly according to claim 14, wherein, The anti-shake movable part includes a carrier body and a carrier extension arm extending outward from the carrier body, wherein the first friction drive part of the first piezoelectric actuator and the second friction drive part of the second piezoelectric actuator are frictionally coupled to the lower surface of the carrier extension arm.

16. The image stabilization drive assembly according to claim 15, wherein, The carrier body has a mounting groove lower than the carrier extension arm, wherein the photosensitive component is adapted to be installed in the mounting groove.

17. The image stabilization drive assembly according to claim 15, wherein, There is an accommodating space between the carrier extension arm and the substrate, and the first piezoelectric actuator and the second piezoelectric actuator are housed within the accommodating space.

18. The image stabilization drive assembly according to claim 15, wherein, The anti-shake movable part further includes a friction plate formed on the lower surface of the carrier extension arm, wherein the first friction drive part of the first piezoelectric actuator and the second friction drive part of the second piezoelectric actuator are frictionally coupled to the friction plate.

19. The anti-shake driving assembly according to claim 18, 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.

20. The image stabilization drive assembly according to claim 19, 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.

21. The image stabilization drive assembly according to claim 19, wherein, The carrier body has a mounting groove lower than the carrier extension arm, wherein the photosensitive component is adapted to be mounted in the mounting groove, and 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.

22. The image stabilization drive assembly according to claim 21, wherein, The substrate has an opening formed in its sidewall, wherein the connection end extends outward from the at least one conductive end and passes through the opening.

23. The image stabilization drive assembly according to claim 22, wherein, The opening and the slot have a height difference.

24. The anti-shake drive assembly according to claim 19, 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.

25. The image stabilization drive assembly according to claim 24, wherein, 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 through 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 also 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 through 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.

26. The image stabilization drive assembly according to claim 25, wherein, The thickness of the first elastic element and the second elastic element is 10µm to 50µm.

27. The anti-shake drive assembly according to claim 25, further comprising a guide device disposed between the upper surface of the carrier extension arm and the upper cover, the guide device being adapted to guide the anti-shake movable part to move within the XOY plane defined by the X-axis and the Y-axis.

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

Images