WO2022166677A1 - Module de caméra, procédé anti-tremblement optique associé, et dispositif électronique - Google Patents

Module de caméra, procédé anti-tremblement optique associé, et dispositif électronique Download PDF

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Publication number
WO2022166677A1
WO2022166677A1 PCT/CN2022/073679 CN2022073679W WO2022166677A1 WO 2022166677 A1 WO2022166677 A1 WO 2022166677A1 CN 2022073679 W CN2022073679 W CN 2022073679W WO 2022166677 A1 WO2022166677 A1 WO 2022166677A1
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WIPO (PCT)
Prior art keywords
actuator
piezoelectric
camera module
shake
base
Prior art date
Application number
PCT/CN2022/073679
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English (en)
Chinese (zh)
Inventor
叶林敏
黄桢
戎琦
郑雪莹
卞强龙
阙嘉耀
Original Assignee
宁波舜宇光电信息有限公司
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Application filed by 宁波舜宇光电信息有限公司 filed Critical 宁波舜宇光电信息有限公司
Priority to CN202280012186.5A priority Critical patent/CN116802549A/zh
Publication of WO2022166677A1 publication Critical patent/WO2022166677A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
    • H04N23/682—Vibration or motion blur correction
    • H04N23/685—Vibration or motion blur correction performed by mechanical compensation
    • H04N23/687—Vibration or motion blur correction performed by mechanical compensation by shifting the lens or sensor position
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules

Definitions

  • the present invention relates to the technical field of cameras, and in particular, to a camera module and an optical anti-shake method and electronic device thereof.
  • the motor mechanism is complicated, the number of parts increases, and the thickness of the apparatus body tends to increase.
  • the density of the internal components of the motor also increases.
  • the internal magnetic field will interact with each other, causing the magnet to shift or shake, affecting the focus and image quality of the lens.
  • One of the main advantages of the present invention is to provide a camera module, an optical anti-shake method and an electronic device, wherein the camera module uses a piezoelectric driving device to convert electrical energy into elastic deformation to drive the photosensitive component to move, which is beneficial to Improve the anti-electromagnetic interference effect of the camera module.
  • Another advantage of the present invention is to provide a camera module and an optical anti-shake method and electronic device thereof, wherein the camera module uses a piezoelectric actuator as a drive to drive the photosensitive component of the camera module to move relative to the lens component, there are It is beneficial to improve the optical anti-shake stroke of the camera module.
  • Another advantage of the present invention is to provide a camera module and its optical anti-shake method and electronic device, wherein balls are arranged in the camera module, and sliding friction is replaced by rolling friction to reduce friction, which is beneficial to improve optical anti-shake. Effect.
  • Another advantage of the present invention is to provide a camera module and its optical anti-shake method and electronic device, wherein the camera module uses the bottom surface of the fixed base as a reference plane to ensure the flatness of a driving part of the optical anti-shake.
  • Another advantage of the present invention is to provide a camera module and an optical anti-shake method and electronic device thereof, wherein the camera module includes a reinforcing sheet, and the plane where the reinforcing sheet is located is used as a reference plane to ensure the optical anti-shake.
  • Another advantage of the present invention is to provide a camera module and an optical anti-shake method and electronic device thereof, wherein the optical anti-shake device includes a first actuator and a second actuator, wherein the first coincidence
  • the actuator and the second actuator form a dislocation structure on the camera module, avoiding the height direction of the first actuator and the second actuator on the same side of the photosensitive assembly
  • the upper overlapping arrangement increases the height of the photosensitive assembly, resulting in an increase in the height of the module, or the focal plane of the lens assembly cannot fall on the photosensitive chip, which affects the imaging effect.
  • Another advantage of the present invention is to provide a camera module, an optical anti-shake method, and an electronic device, wherein the camera module can move in two directions through different frames, and the movement in the two directions is driven separately, without any Mutual interference is generated, and the anti-interference effect of the camera module is improved.
  • a piezoelectric actuator of the present invention capable of achieving the aforementioned objects and other objects and advantages is suitable for driving a photosensitive component of a camera module, wherein the camera module further includes a support frame , the piezoelectric actuator is fixed to the support frame, and the piezoelectric actuator includes:
  • a vibrating substrate wherein one end of the vibrating substrate is connected to the piezoelectric substrate, and a potential is applied to the piezoelectric substrate through the vibrating plate to cause the piezoelectric substrate and the vibrating substrate to contract or inflate;
  • the drive shaft is disposed at the other end of the vibration base plate, and the drive shaft is driven to move by the vibration base plate;
  • a moving member wherein the moving member is arranged on the driving shaft, and the moving member is frictionally connected with the driving shaft, and the moving member is driven by the driving shaft to move along the direction of the driving shaft,
  • the piezoelectric actuator to drive the photosensitive component to move along the X-axis direction and/or the Y-axis direction, so as to realize the optical anti-shake of the camera module.
  • the piezoelectric substrate is a substrate that contracts or expands according to a polarization direction and an electric field direction, and the vibration substrate has a constant thickness.
  • the piezoelectric substrate and the vibration substrate are in the shape of a disk, and the piezoelectric substrate is mounted on the upper and lower surfaces of the vibration substrate.
  • the piezoelectric actuator includes a first actuator and a second actuator, wherein the first actuator is disposed on an anti-shake base of the support frame Between the seat and the photosensitive assembly, the second actuator is arranged between the anti-shake base and an outer frame of the support frame, whereby the first actuator drives the photosensitive The assembly moves along the X-axis direction, and the second actuator drives the anti-shake base to move along the Y-axis direction.
  • the first actuator and the second actuator are arranged in a staggered manner.
  • the piezoelectric substrate of the first actuator is fixed to the anti-shake base, and the moving member of the first actuator is fixed to the photosensitive component , for the first actuator to use the anti-shake base as a support to drive the moving member to move along the X-axis direction, so that the moving member drives the photosensitive component to move.
  • the piezoelectric substrate of the second actuator is fixed to the outer frame, and the moving member of the second actuator is in contact with the anti-shake base. fixed, so that the second actuator uses the outer frame as a support to drive the moving member to move along the Y-axis direction, so that the moving member drives the anti-shake base to move.
  • the first actuator is located inside the anti-shake base
  • the second actuator is located outside the anti-shake base
  • the first actuator The second actuator is located on two adjacent sides of the anti-shake base.
  • the first actuator is located inside the anti-shake base
  • the second actuator is located outside the anti-shake base
  • the first actuator The second actuator is located at two diagonal positions of the anti-shake base.
  • the first actuator is located inside the anti-shake base
  • the second actuator is located outside the anti-shake base
  • the first actuator The second actuator is located on two opposite sides of the anti-shake base.
  • the piezoelectric substrate of the first actuator and/or the piezoelectric substrate of the second actuator is fixed to a lens assembly of the camera module and the drive shaft of the first actuator extends along the X-axis direction from the vibration base plate, and the drive shaft of the second actuator extends from the vibration base plate along the Y-axis direction.
  • the piezoelectric actuator includes a first actuator and a second actuator, wherein the first actuator is disposed on an anti-shake base of the support frame Between the seat and an outer frame, the second actuator is arranged between the anti-shake base and the photosensitive assembly, whereby the first actuator drives the anti-shake assembly along the X-axis The second actuator drives the photosensitive component to move along the Y-axis direction.
  • the piezoelectric substrate of the second actuator is located outside the outer frame, and the vibration substrate, the moving member and the The drive shaft extends inward from the outer side of the outer frame to the inner side of the outer frame.
  • the piezoelectric substrate of the first actuator is originally fixed to the photosensitive component, and the moving part of the first actuator is driven by the anti-shake substrate connected, and the piezoelectric substrate of the first actuator is electrically connected to a circuit board of the photosensitive assembly.
  • the present invention further provides a camera module, comprising:
  • a photosensitive assembly wherein the lens assembly is disposed on the photosensitive path of the photosensitive assembly along the photosensitive path of the photosensitive assembly;
  • At least one piezoelectric actuator wherein the at least one piezoelectric actuator is drivingly connected with the photosensitive component, wherein the piezoelectric actuator includes a piezoelectric element, a drive shaft and a moving part, One end of the piezoelectric element is fixed, and the drive shaft is provided to the piezoelectric element, and the drive shaft is in frictional contact with the moving member, wherein the piezoelectric element drives the drive The moving member is driven by the driving shaft through friction, and then the photosensitive component is driven by the piezoelectric actuator to move along the X-axis direction and/or the Y-axis direction, so as to realize the optical anti-shake of the camera module .
  • the piezoelectric element of the piezoelectric actuator includes a piezoelectric substrate and a vibration substrate, wherein one end of the vibration substrate is connected to the piezoelectric substrate, and passes through the piezoelectric substrate.
  • the vibration plate applies a potential to the piezoelectric substrate to cause contraction or expansion of the piezoelectric substrate and the vibration substrate, wherein the drive shaft is provided at the other end of the vibration substrate, and the vibration substrate is The drive shaft is driven to move.
  • the piezoelectric substrate and the vibration substrate are in the shape of a disk, and the piezoelectric substrate is mounted on the upper and lower surfaces of the vibration substrate.
  • the piezoelectric element includes a plurality of piezoelectric stretchable bodies and a plurality of electrodes, and the plurality of piezoelectric stretchable bodies and the plurality of electrodes are alternately arranged.
  • the lens assembly includes a lens, a lens carrier, and at least a fixed base, wherein the lens is mounted on the lens carrier, wherein the piezoelectric actuator A piezoelectric element is provided on the fixed base of the lens assembly.
  • the piezoelectric actuator includes a first actuator and a second actuator
  • the support frame includes an anti-shake base and an outer frame
  • the anti-shake The base is located inside the outer frame
  • the first actuator is arranged between the anti-shake base of the support frame and the photosensitive assembly
  • the second actuator is arranged at Between the anti-shake base and the outer frame of the support frame, the first actuator drives the photosensitive assembly to move along the X-axis direction, and the second actuator drives the anti-shake The shaker base moves in the Y-axis direction.
  • the first actuator and the second actuator are arranged in a height direction offset.
  • the first stopper and the second stopper are located between the fixed base and the photosensitive assembly, and the first stopper and the second stopper are located on the fixed base below, and the first brake and the second brake are electrically connected to the fixed base.
  • the fixed base is provided with at least two LDS grooves, and the surface of the LDS grooves is plated with a conductive coating.
  • the first actuator is disposed on a side wall of the anti-shake base, the first actuator is fixed on the anti-shake base, and drives the photosensitive component Moving along the X-axis direction, the second actuator is arranged on a bottom side of the fixed base, the second actuator is fixed on the fixed base, and drives the anti-shake base along the Y move in the direction of the axis.
  • the piezoelectric element of the first actuator is fixed to the anti-shake base in a manner of bonding with an adhesive, and the second actuator is bonded with an adhesive fixed to the outer frame.
  • it further includes at least one guide unit, wherein the one-way unit is disposed opposite to the piezoelectric actuator, and the photosensitive member is guided to move by the guide unit.
  • the guide unit includes a first guide unit and a second guide unit, the first guide unit is disposed on the photosensitive assembly, and the first guide unit is consistent with the first guide unit.
  • the actuators are arranged opposite to each other, the second guide unit is arranged on the anti-shake base, and the second guide unit is arranged opposite to the second actuator.
  • the first guide unit is a guide rod whose length direction is consistent with the X direction
  • the second guide unit is a guide rod whose length direction is consistent with the Y direction.
  • the piezoelectric substrate of the first actuator is fixed to the anti-shake base, and the moving member of the first actuator is fixed to the photosensitive component , for the first actuator to use the anti-shake base as a support to drive the moving member to move along the X-axis direction, so that the moving member drives the photosensitive component to move.
  • the piezoelectric substrate of the second actuator is fixed to the outer frame, and the moving member of the second actuator is in contact with the anti-shake base. fixed, so that the second actuator uses the outer frame as a support to drive the moving member to move along the Y-axis direction, so that the moving member drives the anti-shake base to move.
  • the first actuator is located inside the anti-shake base
  • the second actuator is located outside the anti-shake base
  • the first actuator The second actuator is located on two adjacent sides of the anti-shake base.
  • the first actuator is located inside the anti-shake base
  • the second actuator is located outside the anti-shake base
  • the first actuator The second actuator is located at two diagonal positions of the anti-shake base.
  • the first actuator is located inside the anti-shake base
  • the second actuator is located outside the anti-shake base
  • the first actuator The second actuator is located on two opposite sides of the anti-shake base.
  • the piezoelectric substrate of the first actuator and/or the piezoelectric substrate of the second actuator is fixed to a lens assembly of the camera module and the drive shaft of the first actuator extends along the X-axis direction from the vibration base plate, and the drive shaft of the second actuator extends from the vibration base plate along the Y-axis direction.
  • the piezoelectric actuator includes a first actuator and a second actuator, wherein the first actuator is disposed on an anti-shake base of the support frame between the seat and an outer frame, the second actuator is arranged between the anti-shake base and the photosensitive assembly, whereby the first actuator drives the anti-shake assembly along the X-axis
  • the second actuator drives the photosensitive component to move along the Y-axis direction.
  • the piezoelectric substrate of the second actuator is located outside the outer frame, and the vibration substrate, the moving member and the The drive shaft extends inward from the outer side of the outer frame to the inner side of the outer frame.
  • the photosensitive assembly further includes at least one reinforcing sheet, the reinforcing sheet is disposed on the lower side of the circuit board of the photosensitive assembly, and is used to support the circuit board and is driveably connected to the piezoelectric actuator.
  • the lens assembly further includes at least one lens actuator, wherein the lens actuator is disposed on the fixed base and is driven with the lens carrier of the lens assembly connected to the ground, and the lens carrier is driven by the lens actuator to move up and down along the optical axis direction with the fixed base as a fulcrum, so as to realize the automatic focusing of the camera module.
  • the lens actuator includes at least one autofocus coil and at least one autofocus magnet, wherein the autofocus coil and the autofocus magnet are arranged in opposite positions, and the lens actuator
  • the AF coil is supported on the fixed base, and the AF magnet is arranged on the lens carrier.
  • the present invention further provides an optical anti-shake method for a camera module, wherein the optical anti-shake method includes the following steps:
  • the at least one piezoelectric actuator expands or contracts based on the potential signal, so as to drive the photosensitive component to move along the X-axis direction and/or the Y-axis direction, so as to realize the optical anti-shake of the camera module.
  • the step (b) of the optical anti-shake method further includes, the piezoelectric actuator includes a piezoelectric substrate and a vibration substrate disposed on the piezoelectric substrate,
  • the potential signal is applied to a piezoelectric substrate through a vibration substrate of the piezoelectric actuator, wherein the piezoelectric substrate expands or contracts based on the potential signal, and drives the vibration substrate to expand or contract to deform.
  • the piezoelectric actuator further includes a drive shaft and a moving member in frictional contact with the drive shaft, wherein the drive shaft is driven by the vibration substrate, and the drive shaft is driven by the drive shaft The moving part is driven to move.
  • the present invention further provides an electronic device, characterized in that it includes:
  • At least one camera module wherein the at least one camera module is mounted on the main body of the electronic device, and the camera module includes:
  • a photosensitive assembly wherein the lens assembly is disposed on the photosensitive path of the photosensitive assembly along the photosensitive path of the photosensitive assembly;
  • At least one piezoelectric actuator wherein the at least one piezoelectric actuator is drivingly connected with the photosensitive component, wherein the piezoelectric actuator includes a piezoelectric element, a drive shaft and a moving part, One end of the piezoelectric element is fixed, and the drive shaft is provided to the piezoelectric element, and the drive shaft is in frictional contact with the moving member, wherein the piezoelectric element drives the drive The moving member is driven by the driving shaft through friction, and then the photosensitive component is driven by the piezoelectric actuator to move along the X-axis direction and/or the Y-axis direction, so as to realize the optical anti-shake of the camera module .
  • one end of the vibration substrate is connected to the piezoelectric substrate, and a potential is applied to the piezoelectric substrate through the vibration plate to cause the piezoelectric substrate and the vibration substrate contraction or expansion, wherein the drive shaft is arranged at the other end of the vibration base plate, and the drive shaft is driven by the vibration base plate to move.
  • FIG. 1 is a schematic structural diagram of a camera module according to a preferred embodiment of the present invention.
  • FIGS. 2A to 2C are schematic diagrams showing several installation positions of a piezoelectric actuator of the camera module according to the above preferred embodiment of the present invention.
  • 3A to 3E are schematic structural diagrams of the piezoelectric actuator of the camera module according to the above preferred embodiment of the present invention.
  • Fig. 4 is a schematic diagram of the driving action of the piezoelectric actuator of the camera module according to the above preferred embodiment of the present invention.
  • FIG. 5 is a schematic plan view of the camera module according to the above-mentioned preferred embodiment of the present invention, which shows the structure of an auto-focusing device of the camera module.
  • FIG. 6 is a schematic structural diagram of a camera module according to another preferred embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a camera module according to another preferred embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a camera module according to another preferred embodiment of the present invention.
  • FIG. 9 is a schematic diagram of an electronic device according to a preferred embodiment of the present invention.
  • FIG. 10 is a method flowchart of an optical image stabilization method of a camera module according to a preferred embodiment of the present invention.
  • the camera module includes a lens assembly 10 , a photosensitive assembly 20 , a support frame 30 and at least one piezoelectric actuator 40 disposed on the support frame 30 , wherein the piezoelectric actuator 40 is connected to the support frame 30 .
  • the photosensitive assembly 20 is connected in a driving manner, and the photosensitive assembly 20 is driven by the piezoelectric actuator 40 based on the position of the support frame 30 along two directions perpendicular to each other on the imaging plane, that is, the X-axis direction and/or Movement in the Y-axis direction to achieve optical anti-shake of the camera module.
  • the lens assembly 10 is disposed on the photosensitive path of the photosensitive assembly 20 , so that the photosensitive assembly 20 can receive light incident from the lens assembly 10 to perform imaging.
  • the support frame 30 includes an anti-shake base 31 and an outer frame body 32, wherein the anti-shake base 31 is located inside the outer frame body 32, and the photosensitive assembly 20 is located on the anti-shake base 31 inside, wherein the piezoelectric actuator 40 drives the photosensitive assembly 20 to move based on the anti-shake base 31 and/or the outer frame 32 of the support frame 30 to realize the camera module optical image stabilization.
  • the outer frame body 32 is fixedly arranged, that is, the position of the outer frame body 32 is fixed, wherein the anti-shake base 31 can be moved by the piezoelectric actuator relative to the outer frame body 32 40 drives.
  • the anti-shake base 31 is used to control the photosensitive component 20 to perform optical anti-shake in the optical anti-shake process.
  • the shake base 31 is accommodated in the outer frame body 32, that is, the anti-shake base 32 is disposed between the photosensitive assembly 20 and the outer frame body 32, and the outer frame body 32 is located in the outer frame body 32.
  • the outermost side of the camera module serves as its casing.
  • the piezoelectric actuator 40 further includes at least one first actuator 40a and at least one second actuator 40b, wherein the first actuator 40a is located in the Between the photosensitive assembly 20 and the anti-shake base 31 , the second actuator 40 b is located between the anti-shake base 31 and the outer frame 32 .
  • the first actuator 40a drives the photosensitive assembly 20 to move along the X-axis direction based on the anti-shake base 31, so as to realize the optical anti-shake of the camera module in the X-axis direction
  • the second actuator 40b drives the anti-shake base 31 and the photosensitive assembly 20 to move along the Y-axis direction based on the outer frame body 32, so as to realize the optical anti-shake of the camera module in the Y-axis direction.
  • first actuator 40a and the second actuator 40b of the piezoelectric actuator 40 are shown, wherein the first actuator 40a and the second actuator 40b
  • An actuator 40a and the second actuator 40b are arranged diagonally, that is, the first actuator 40a and the second actuator 40b are located at two opposite corners of the anti-shake base 31 .
  • the first actuator 40a and the second actuator 40b are arranged on adjacent sides, that is, the first actuator 40a and the second actuator 40b are located in the anti-shake two adjacent sides of the base 31 .
  • first actuator 40a and the second actuator 40b are disposed on opposite sides, that is, the first actuator 40a and the second actuator 40b are located on the anti-shake base Two opposite sides of seat 31. Therefore, it can be understood that the positions of the first actuator 40a and the second actuator 40b are provided herein only as an example and not a limitation.
  • the first actuator 40a and the second actuator 40b can be respectively disposed on adjacent sides or opposite sides of the anti-shake base 31 .
  • the first actuator 40a and the second actuator 40b are respectively disposed in the middle of the adjacent sides of the anti-shake base 31, so that the piezoelectric actuator 40 drives The photosensitive assembly 20 moves smoothly.
  • the first actuator 40a and the second actuator 40b are disposed at two corners of the anti-shake base 31, namely the first actuator 40a and the second actuator 40b
  • the first actuator 40a and the second actuator 40b may be disposed at adjacent or opposite corners of the anti-shake base 31, respectively.
  • the first actuator 40a and the second actuator 40b can also be arranged at the same corner of the anti-shake base 31, that is, the first actuator 40a and the The second actuators 40b are respectively drawn out from the same corner of the anti-shake base 31, so that when conducting circuit conduction, they can extend upward from the same corner to the circuit board of the photosensitive component through wires or flexible boards, so as to realize The circuit is turned on, thereby simplifying the circuit arrangement of the camera module.
  • the first actuator 40a and the second actuator 40b are installed in the outer frame 32 of the camera module.
  • a dislocation structure is formed, which avoids the overlapping arrangement of the first actuator 40a and the second actuator 40b in the height direction of the same side of the photosensitive assembly, increasing the height of the photosensitive assembly 20 and causing the camera Mod height increased.
  • the first actuator 40a and the second actuator 40b of the piezoelectric actuator 40 are dislocated in phase, that is, the first actuator 40a and the second actuator 40b
  • the actuator 40a and the second actuator 40b do not overlap each other in the height direction of the same side of the photosensitive assembly, so as to avoid increasing the height of the photosensitive assembly 20 .
  • the photosensitive assembly 20 is driven by the first actuator 40a to move in the X-axis direction and the photosensitive assembly 20 is driven by the second actuator 40b
  • the movement in the Y-axis direction is realized, that is, the movement in the XY direction is realized through different frames, so as to drive the optical anti-shake in two directions separately, so there will be no mutual interference.
  • one end of the first actuator 40a of the piezoelectric actuator 40 is fixed to the inner side of the anti-shake base 31, wherein the The other end of the first actuator 40a is drivingly connected with the photosensitive assembly 20, and the photosensitive assembly 20 is driven by the first actuator 40a to move along the X-axis direction based on the anti-shake base 31.
  • One end of the second actuator 40b of the piezoelectric actuator 40 is fixed to the inner side of the outer frame body 32, wherein the other end of the second actuator 40b is connected to the anti-shake base
  • the 31-phase transmission is connected, and the anti-shake base 31 and the photosensitive assembly 20 are driven by the second actuator 40b based on the outer frame 32 to move along the Y-axis direction.
  • the piezoelectric actuator 40 includes a piezoelectric element 401, a drive shaft 43 and a moving member 44, the piezoelectric element includes a piezoelectric substrate 41 and a vibration substrate 42, wherein the vibration substrate 42 is located at the between the driving shaft 43 and the piezoelectric substrate 41 , and the moving member 44 can be in frictional contact with the driving shaft 43 , and the moving member 44 is driven by the frictional force between the driving shaft 43 and the moving member 44 .
  • the moving member 44 moves in the X-axis direction. It is worth mentioning that the length direction of the drive shaft 43 of the first actuator 40a of the piezoelectric actuator 40 is arranged along the X-axis direction.
  • the vibration substrate 42 of the piezoelectric actuator 40 drives the drive shaft 43 to move in the X-axis direction, whereby the drive shaft 43 drives the moving member 44 to move through friction.
  • the piezoelectric substrate 41 of the first actuator 40 a of the piezoelectric actuator 40 is fixed to the anti-shake base 31 , and the moving member 44 is drivingly connected to the photosensitive assembly 20 , the photosensitive assembly 20 is driven by the moving member 44 to move along the X-axis direction.
  • the shape of the drive shaft 43 is suitable to be cylindrical or polygonal, preferably cylindrical, and the drive shaft 43 is fixed to the vibration substrate 42 .
  • the vibration substrate 42 is a piezoelectric ceramic rod or a piezoelectric ceramic sheet, and the vibration substrate 42 and the drive shaft 43 can be connected by adhesive or integrally formed by injection molding.
  • the substrate 42 has a simpler structure and lower cost.
  • the vibrating substrate 42 is not limited to piezoelectric ceramics, and may also be other structures capable of driving the photosensitive component to move by utilizing the piezoelectric principle.
  • the piezoelectric substrate 41 can be fixed to the inner side of the anti-shake base 31 and disposed between the photosensitive component 20 and the anti-shake base 31 , and one end of the vibration substrate 42 is connected to the piezoelectric substrate 41 to The other end is connected to the drive shaft 43 , wherein the moving member 44 can be in frictional contact with the drive shaft 43 .
  • the moving member 44 is fixed to the photosensitive assembly 20, and the photosensitive assembly is moved in the X direction by driving the vibrating substrate 42, wherein the length direction of the driving shaft 43 is consistent with the X direction.
  • the piezoelectric substrate 41 may be fixed to the anti-shake base 31 by bonding with an adhesive.
  • an elastic adhesive soft glue
  • the drive shaft 43 can also be fixed on the photosensitive component 20 through an elastic adhesive, and the other end of the drive shaft 43 is movably connected, so The vibration substrate 42 and the drive shaft 43 of the first actuator 40a can vibrate freely.
  • the moving member 44 may be fixed to the circuit board or the bracket of the photosensitive assembly 20 by means of bonding, or may be fixed in a direction integrally formed with the bracket.
  • the piezoelectric substrate 41 may be integrally formed with the anti-shake base.
  • the piezoelectric substrate 41 is a substrate having a piezoelectric effect and shrinks or expands according to the polarization direction and the electric field direction, and the vibration substrate 42 may have a constant thickness.
  • the vibrating substrate 42 according to the present embodiment has a piezoelectric substrate 41 connected to a single crystal type or a double crystal type, and a potential is applied to the piezoelectric substrate 41, and the difference in the applied voltage is controlled by a controller to cause the piezoelectric substrate 41 and the Contraction and expansion of the vibration substrate 42 .
  • the piezoelectric substrate 41 and the vibration substrate 42 have a disc shape, and preferably the piezoelectric substrate is mounted on the upper and lower surfaces of the vibration substrate 42 .
  • the piezoelectric substrate 41 When the polarization direction of the piezoelectric substrate 41 is different from the electric field direction caused by the potential difference on the piezoelectric substrate 41 , the piezoelectric substrate 41 is stretched in the width direction and deformed in the direction in which the thickness decreases. , due to the expansion of the piezoelectric substrate 41 , the vibration substrate 42 will protrude and deform upwards.
  • the piezoelectric substrate 41 and the direction of the electric field applied to the piezoelectric substrate 41 are the same, the piezoelectric substrate 41 is deformed and contracted, so that its width becomes narrower and its thickness increases.
  • the potential difference of the voltage applied to the piezoelectric substrate 41 can be reversed instantaneously, and the piezoelectric substrate 41 and the vibration substrate 42 also change the displacement state accordingly.
  • the piezoelectric substrate 41 and the vibrating substrate 42 can vibrate up and down continuously.
  • the drive shaft 43 is fixed on the composite layer of the piezoelectric substrate 41 and the vibration substrate 42, and is fixed on the piezoelectric substrate 41 or the vibration substrate according to the uppermost layer of the composite layer. 42.
  • the control unit may generate bending deformation of the composite layer of the piezoelectric substrate 41 and the vibration substrate 42 by applying a voltage to the piezoelectric substrate 41 . As described above, if the voltage applied to the piezoelectric substrate 41 is repeatedly changed in potential difference, the piezoelectric substrate 41 and the vibration substrate 42 can vibrate up and down continuously.
  • the piezoelectric actuator 40 of this embodiment uses the law of inertia to allow the moving body/driven object to move along the direction of the drive shaft 43 .
  • the inertia of the driving shaft 43 is smaller than the static friction force between the driving shaft 43 and the moving member 44 oscillating in response to the displacement of the piezoelectric substrate 41 , the moving member 44 and the driving shaft 43 Although they move together, if the inertia of the drive shaft 43 is greater than the static friction between the drive shaft 43 and the moving member 44, the moving member 44 is stationary and only moves the drive shaft 43, and in all The position on the drive shaft 43 of the moving member 44 changes.
  • the voltage applied by the control unit of the present embodiment to the piezoelectric substrate 41 of the piezoelectric actuator 40 may include a forward voltage and a contraction voltage, and the forward voltage and the contraction voltage are obtained from the first voltage during the first period
  • the change to the second voltage is from the second voltage to the first voltage during the second period, wherein the first period of the forward voltage is longer than the second period and the second period of the systolic voltage is longer than the first period.
  • the forward voltage and the reverse voltage are configured to cause the piezoelectric substrate 41 to bulge upward during the first period and downward during the second period, so that during the first period in which the forward voltage is applied, when all the When the moving member 44 moves forward on the driving shaft 43 and a contraction voltage is applied, the moving member 44 can retreat on the driving shaft 43 during the second cycle.
  • the piezoelectric substrate 41 at one end will expand and contract, so that the vibration substrate 42 protrudes in one direction. It deforms into a bowl shape and quickly returns to its original flat shape.
  • the drive shaft 43 reciprocates in the longitudinal direction of the shaft, and due to the frictional contact between the moving member 44 and the drive shaft 43, when the vibration base plate 42 is deformed into a bowl shape in one direction , the moving member 44 and the driving shaft 43 move together, and when the vibrating substrate 42 quickly returns to the original flat shape, the driving shaft 43 also moves in the reverse direction. Since the moving member is in a high-speed state, it cannot be Following the action of the drive shaft 43, it cannot return to the original position, and can only stay at the position. Therefore, in an operation process, the moving member 44 moves with a relatively large deformation amplitude of the vibration substrate 42. By repeatedly applying the pulse voltage, the above-mentioned movement can be repeated, and the moving member 44 can be moved to the target position.
  • the piezoelectric actuator 40 has the advantages of small size, large thrust, and high precision, and the driving structure is relatively simple, which is suitable for driving heavier products. , adapt to the product trend of large image surface of camera module, glass lens and other products, used for chip anti-shake, prism anti-shake and other purposes. At the same time, in the anti-shake of the chip, the super-resolution control can be realized by taking advantage of its control accuracy.
  • the piezoelectric actuator 40 includes a piezoelectric element 401 , a driving shaft 43 and a moving member 44 , and the piezoelectric element 401 has the following laminated structure , the piezoelectric element 401 further includes a plurality of piezoelectric stretchable bodies 45 and a plurality of electrodes 46, and the plurality of piezoelectric stretchable bodies 45 and a plurality of electrodes 46 are alternately stacked.
  • the piezoelectric element 401 has a laminated structure, a large displacement amount can be obtained even when a small electric field is applied.
  • the plurality of piezoelectric stretchable bodies 45 will deform, expand or contract, and the driving force is driven by the continuous deformation of the piezoelectric element 401
  • the shaft 43 realizes the reciprocating motion.
  • the drive shaft 43 has a cylindrical shape with a flat lower surface.
  • the drive shaft 43 is bonded to the piezoelectric element 401 by adhering to the center portion of the upper surface of the piezoelectric element 401 .
  • the shape of the drive shaft 43 may be a shape other than a cylindrical shape such as a polygonal prism.
  • the drive shaft 43 is formed of a material mainly composed of carbon, heavy metals, carbides of heavy metals, borides of heavy metals, and nitrides of heavy metals.
  • the piezoelectric element 401 has a rectangular parallelepiped shape having sides along an X axis, a Y axis, and a Z axis that are orthogonal to each other, respectively.
  • the length of the piezoelectric element 401 in the X-axis direction is 1 mm
  • the length in the Y-axis direction is 1 mm
  • the length (height) in the Z-axis direction is 2 mm.
  • the plurality of electrodes 46 are arranged on the plurality of piezoelectric stretchable bodies 45 , and the plurality of electrodes 46 sandwiching the plurality of piezoelectric stretchable bodies 45 alternately are used as internal electrodes .
  • the plurality of electrodes 46 arranged on the surfaces of the plurality of piezoelectric stretchable bodies 45 and arranged at the upper and lower portions thereof are referred to as upper electrodes and lower electrodes, respectively.
  • the plurality of piezoelectric stretchable bodies 45 arranged on the surfaces of the plurality of piezoelectric stretchable bodies 45 and arranged on the side surfaces thereof are referred to as side electrodes.
  • a pair of the electrodes 46 are disposed on the upper and lower surfaces of the piezoelectric stretchable body 45 by welding or the like.
  • the side electrodes are connected to an external circuit.
  • the electrode layers of the same polarity are connected through the electrodes of the side electrodes, so that the electrode layers of the positive and negative electrodes can be drawn out on the two side surfaces.
  • the drive shaft 43 reciprocates in the longitudinal direction of the shaft, and due to the frictional contact between the moving member 44 and the driving shaft 43, when the vibration substrate 42 is deformed in one direction, the moving member 42 and the The drive shaft 43 moves together, and when the vibrating base plate 42 quickly returns to its original state, the drive shaft 43 also moves in the reverse direction. Since the moving member 44 is in a high-speed state, it cannot follow the action of the drive shaft 43. Failed to return to the original position, can only stay at the position. Therefore, in an operation process, the moving member 44 moves with a large deformation amplitude of the piezoelectric stretchable bodies 41. By repeatedly applying the pulse voltage, the above-mentioned movement can be repeated, and the moving member can be made to move. 44 to move to the target position.
  • the piezoelectric actuator 40 not only has the advantages of small size, large thrust, high precision, relatively simple driving structure, and is suitable for driving heavier products, Moreover, the structure is smaller, the circuit extends through the side surface of the piezoelectric element, the circuit is relatively simple, and it is suitable for use in a module with compact space.
  • the structures of the first actuator 40a and the second actuator 40b of the piezoelectric actuator 40 are the same, and the difference lies in the first actuator 40a and the second actuator 40b.
  • the piezoelectric substrate 41 of the second actuator 40b may be fixed to the outer frame 32, and the second actuator 40b is provided on the anti-shake base 31 and the Between the outer frame bodies 32 , one end of the vibration substrate 42 is connected to the piezoelectric substrate 41 and the other end is connected to the drive shaft 43 , and the moving member 44 can be in frictional contact with the drive shaft 43 .
  • the moving part 44 of the second actuator 40b can be fixed to the outer frame, so that the vibration base plate 42 can be driven to realize the anti-shake base in Y
  • the movement in the Y direction drives the movement of the photosensitive component 20 in the Y direction
  • the length direction of the drive shaft 43 is consistent with the Y direction.
  • the piezoelectric substrate 41 may be fixed to the outer frame by bonding with an adhesive.
  • the drive shaft 43 can also be fixed on the outer frame by an elastic adhesive, or the other end of the drive shaft 43 can be movably connected, suspended on the outer frame 32 or suspended in the air, etc. , so that the vibration substrate 42 and the drive shaft 43 of the second actuator 40b can vibrate freely.
  • the moving member 44 may be fixed to the anti-shake base 31 by means of bonding, or may be fixed in a direction integrally formed with the anti-shake base 31 .
  • the piezoelectric substrate 41 may be integrally formed with the outer frame body 32 .
  • the piezoelectric actuator 40 is electrically connected to the circuit board of the photosensitive component 20 , and a pulse voltage is provided to the vibration substrate 42 of the piezoelectric actuator 40 through the circuit board of the photosensitive component 20 ,
  • the vibration base plate 42 provides vibration of the drive shaft 43 along the X (Y) axis direction, so that the drive shaft 43 slightly reciprocates in the axis direction, whereby the drive shaft 43 drives the moving member 44 Linear movement on the drive shaft 43 . It is worth mentioning that by supplying the vibration substrate 42 with pulse voltages of different frequencies, the speed of the vibration of the drive shaft 43 in the axial direction is controlled, thereby changing the movement of the moving member 44 on the drive shaft 43 . rate.
  • a pulse voltage is provided to the vibration substrate 42 of the first actuator 40a, so that the vibration substrate 42 provides vibration of the drive shaft 43 in the direction of the positive X axis, so that the drive shaft 43 is The positive direction of the X-axis is slightly reciprocating, so that the moving member 44 is driven to move linearly along the positive direction of the X-axis on the drive shaft 43, thereby driving the photosensitive assembly 20 to move in the positive direction of the X-axis.
  • the drive shaft 43 is also rapidly retracted in the negative X direction, because the moving member 44 moves along the X direction Due to the inertial effect, although there is friction, the moving part 44 will be kept in place to achieve optical anti-shake in the X-axis direction.
  • the second actuator 40b can generate a driving force along the Y-axis direction to provide a pulse voltage to the vibrating substrate 42 of the second actuator 40b, so that the vibrating substrate 42 provides the desired voltage.
  • the vibration of the drive shaft 43 in the positive direction of the Y-axis causes the drive shaft 43 to move back and forth slightly in the positive direction of the Y-axis, thereby driving the moving member 44 to linearly move along the positive direction of the Y-axis on the drive shaft 43 .
  • the second actuator 40b is supported by the outer frame 32, drives the anti-shake base to move in the positive direction of the Y-axis, and is driven by the anti-shake base 31 and the first actuator 40a
  • the photosensitive assembly 20 moves along the positive direction of the Y-axis.
  • the drive shaft 43 is also rapidly retracted in the negative direction of the Y axis, because the moving member 44 is in the positive direction of the Y axis. Due to the inertial effect of directional movement, although there is friction, the moving member 44 will be kept in place to achieve optical image stabilization in the Y-axis direction.
  • the piezoelectric actuator is used as the driving motor for driving the photosensitive component to move, which not only has the advantages of small size, large thrust, and high precision, but also has the advantages of a driving structure. It is relatively simple, and has better anti-electromagnetic interference effect than the magnetic driving method.
  • the supporting frame 30 further includes at least one actuator rolling unit 33, wherein the actuator rolling unit 33 is disposed between the anti-shake base 31 of the supporting frame 30 and the outer frame 32, It is used to support the anti-shake base 31 and reduce the friction between the anti-shake base 31 and the outer frame 32 when the anti-shake base 31 moves.
  • a rolling support space 301 is provided between the anti-shake base 31 of the supporting frame 30 and the outer frame body 32 , wherein the actuator rolling unit 33 is arranged on the rolling support of the supporting frame 30 .
  • Support space 301 It can be understood that the actuator rolling unit 33 is used to support and maintain the distance between the anti-shake base 31 and the outer frame 32, and provide the anti-shake base 31 relative to the outer frame 32.
  • the actuator rolling unit 33 may be disposed between the anti-shake base 31 and the side or bottom of the outer frame body 32 , which is not limited in this application.
  • the photosensitive component 20 includes a photosensitive chip 21 , a circuit board 22 , at least one optical filter 23 , a bracket 24 and at least one electronic component 25 .
  • the circuit board 22 is used for carrying the photosensitive chip 21 , the filter 23 , the bracket 24 , and the electronic component 25 .
  • the circuit board may be a PCB (Printed Circuit Board, printed circuit board), a flexible and rigid combination board, or a reinforced FPC (Flexible Printed Circuit, flexible printed circuit board). circuit board).
  • the flexible-rigid board includes laminated PCB and FPC
  • the reinforced flexible circuit board includes laminated FPC and reinforcing sheet
  • the reinforcing sheet can be a sheet material with good heat dissipation performance, such as a steel sheet.
  • the photosensitive chip 21 is arranged on the circuit board 22, and the photosensitive chip 21 is electrically connected to the circuit board 22.
  • the photosensitive chip 21 can sense light, and convert the light signal into a light signal through its own photosensitive function. Imaging electrical signals. It is worth mentioning that the side of the photosensitive chip 21 away from the circuit board 22 includes a photosensitive area and a non-photosensitive area arranged around the photosensitive area.
  • the filter 23 is disposed above the photosensitive chip 21 and supported by the bracket 24 , wherein the bracket 24 is fixed to the circuit board 22 .
  • the piezoelectric actuator 40 realizes optical anti-shake by driving the entire photosensitive assembly 20 to move as a whole, the circuit board 22 , the photosensitive chip 21 , the support 24 , and the filter
  • the light sheet 23 can be packaged as a whole to form a closed space, wherein the photosensitive chip 21 is accommodated in the closed space, which improves the sealing of the photosensitive chip 21 and ensures that the camera module is manufactured or used in the process of Photosensitive chip imaging is not affected by dust.
  • the circuit board 22 is connected to the external electronic device mainboard through a flexible board and a connector.
  • the bracket 24 can be replaced with a package body, that is, a package body is formed on the circuit board 22, and the package body can be used to embed the electronic components 25 and/or photosensitive chips In the non-photosensitive area 21, the package body is integrally formed on the circuit board 22, which can not only reduce the height of the camera module, but also protect the electronic components 25 from pollution and damage.
  • the lens assembly 10 includes a lens 11 and a lens carrier 12 , wherein the lens 11 is mounted on the lens carrier 12 , that is, the lens assembly 10 can be implemented as a fixed-focus lens . In other embodiments of the present invention, the lens assembly 10 may also be implemented as an autofocus lens.
  • the lens assembly 10 further includes at least one lens actuator 13 and a fixed base 14 , wherein the lens actuator 13 is disposed on the fixed base 14 and is connected with the lens assembly 10 .
  • the lens carrier 12 is connected in a driving manner, and the lens actuator 13 uses the fixed base 14 as a fulcrum to drive the lens carrier 12 to move up and down along the optical axis, so as to realize the automatic operation of the camera module.
  • the lens 11 may be mounted on the lens carrier 12 by means of bonding, snapping or screwing.
  • the lens 11 and the lens carrier 12 are integral structures, that is, the lens carrier 12 and the lens barrel of the lens 11 , and at least two lenses of the lens 11 are accommodated in the lens carrier 12 .
  • the integrated structure can reduce the size of the lens barrel in the lens 11 and reduce the gap between the lens barrel and the carrier, so the beneficial effect of reducing the size of the camera module can be achieved.
  • the lens carrier 12 of the lens assembly is accommodated in the fixing base 14 .
  • the lens actuator 13 is arranged on the lens carrier 12 and the fixed base 14, and the fixed base 14 is used as the fulcrum position of the lens actuator 13.
  • the lens actuator 13 generates a driving force for causing the lens carrier to drive the lens to move in the direction of the optical axis, thereby driving the lens carrier 12 to move in the direction of the optical axis.
  • the lens actuator 13 includes at least one AF coil 131 and at least one AF magnet 132 , wherein the AF coil 131 and the AF magnet 132 are disposed in opposite positions.
  • the autofocus coil 131 of the lens actuator 13 is supported on the fixed base 14 .
  • the auto-focusing magnet 132 is disposed opposite to the auto-focusing coil 131 , and the auto-focusing magnet is disposed on the lens carrier 12 .
  • the AF coil 131 of the lens actuator 13 When the AF coil 131 of the lens actuator 13 is energized, the AF coil 131 uses the fixed base 14 as a support point, and generates a magnetic force along the optical axis with the AF magnet 132 . Magnetic force, wherein the auto-focusing magnet 132 drives the lens carrier 12 to move along the optical axis direction under the magnetic action, so as to realize auto-focusing.
  • the lens carrier 12 is provided with at least one magnet mounting portion 121 , wherein the AF magnet 132 is disposed on the magnet mounting portion 121 of the lens carrier 12 .
  • the magnet mounting portion 121 is an opening groove or a fitting surface formed on the outside of the lens carrier 12 .
  • the AF magnet 132 can be embedded in or attached to the side wall of the lens carrier 12, that is, the AF magnet 132 can be embedded or attached to the outer or inner side wall of the lens carrier, ie the The auto-focus coil 131 and the auto-focus magnet 132 are arranged relative to each other.
  • an auto-focus adjustment sensor is arranged on the inner side of the auto-focus coil 131 or on the adjacent side wall, wherein the auto-focus adjustment sensor can sense the movement of the lens carrier 12 of the fixed base 14 during auto-focusing. If the position changes, the auto focus adjustment sensor may be a Hall element.
  • the installation positions of the AF coil 131 and the AF magnet 132 of the lens actuator 13 can be reversed, that is, the AF coil 131 is arranged on the lens carrier 12 , the auto-focusing magnet 132 is arranged on the fixed base 14 .
  • the position of the lens actuator 13 in the present application is not limited to the above-mentioned content.
  • the auto-focus coil 131 can be installed at the corner where one side of the fixed base 14 and the adjacent side are perpendicular.
  • the AF magnet 132 is attached to the magnet attachment portion of the lens carrier facing the AF coil 131 .
  • the AF coil 131 can be fixed on the fixed base 14 through an AF substrate (FPC).
  • FPC AF substrate
  • the auto-focusing magnets 132 generate a driving force along the optical axis direction, and drive the lens carrier 12 to drive the lens 11 to move along the optical axis direction to realize automatic focusing.
  • the fixed base 14 can be used as a part of the lens actuator.
  • the lens actuator 13 further includes at least one lens rolling unit 133, wherein the at least one lens rolling unit 133 is located between the fixed base 14 and the lens carrier 12 for supporting and holding the lens carrier 12 and the fixed base 14, and when the lens actuator 13 drives the lens carrier 12 to move, the lens rolling unit 133 provides the lens carrier 12 relative to the fixed base The movement along the optical axis, and the sliding friction is replaced by rolling friction, reducing the frictional force of the lens carrier when moving.
  • At least one rolling unit accommodating cavity 101 is provided between the lens carrier 12 and the fixed base 14 , wherein the lens rolling unit 133 is held in the rolling unit accommodating cavity 101 .
  • the outer side wall of the lens carrier 12 has at least one first rail 102 along the Z-axis direction
  • the inner side wall of the fixed base 14 has at least one second rail 103 along the Z-axis direction, wherein the first rail 102
  • the position of the second rail 103 is opposite to the position of the second rail 103, so that at least one rolling unit accommodating cavity 101 is formed between the lens carrier 12 and the fixed base 14, and the rolling unit accommodating cavity 101 can accommodate all the
  • the lens rolling unit 133 is accommodated therein to provide movement of the lens carrier 12 relative to the fixed base 14 in the optical axis direction (Z-axis direction). Since the rolling unit accommodating cavity 101 is produced with directional regulations, the lens rolling unit 133 can be moved along the Z-axis direction, and the moving direction of the lens can be made more accurate during auto-focusing.
  • the number of the rolling unit accommodating cavities 101 may be two.
  • the rolling unit accommodating cavities 101 are arranged on the side where the auto-focusing magnet 132 is located, the two rolling unit accommodating cavities 101 are respectively provided On both sides of the auto-focusing magnet, the lens carrier 12 moves more smoothly without tilting during auto-focusing.
  • the rolling unit accommodating cavity 101 may also be disposed at other positions of the lens carrier 12 and the fixing base 14 , which is not limited in this application.
  • the fixing base 14 is located between the lens 11 and the photosensitive assembly 20 , the lens 11 and the photosensitive assembly 20 are respectively fixed on the fixing base 14 , and the photosensitive assembly 20 is relatively opposite to the photosensitive assembly 20 .
  • the fixed base 14 moves along directions perpendicular to each other on the image plane to achieve optical image stabilization. That is to say, during optical image stabilization, the piezoelectric actuator 40 drives the image stabilization base 31 to drive the photosensitive component 20 to move, and the fixed base 14 does not move.
  • the piezoelectric actuator 40 is disposed between the fixed base 14 and the photosensitive component 20 , and the piezoelectric actuator 40 is electrically connected to the fixed base 14 upward. That is, the first actuator 40a and the second actuator 40b are both disposed between the fixed base 14 and the photosensitive assembly 20 .
  • a circuit layer is laid on the surface of the fixing base 14, and the fixing base 14 is connected to the external electronic device mainboard through a flexible board and a connector. conduct conduction.
  • the piezoelectric actuator 40 and the photosensitive component 20 can be electrically connected to the circuit layer of the fixed base 14 through a connection circuit, so as to realize the circuit conduction of the camera module.
  • the piezoelectric actuator 40 and the photosensitive component 20 are placed under the fixed base 14 , it is necessary to extend the piezoelectric actuator 40 and the photosensitive component 20 upward through a wire or a flexible board It is electrically connected to the circuit layer on the surface 14 of the fixed base, and extending the circuit upward to conduct conduction can make full use of the height space of the camera module and avoid the increase of the height of the camera module.
  • the embodiment of the present application can reduce the length of the circuit board of the photosensitive assembly 20, thereby simplifying the wiring arrangement of the camera module.
  • the upper part is the direction in which the light enters
  • the lower part is the direction in which the light exits.
  • At least two LDS grooves may be provided on the surface of the fixed base 14 , the depth of the LDS grooves is not greater than 20-30 ⁇ m, and the width is not less than 60 ⁇ m. technology), a conductive coating (for example, a nickel-palladium-gold coating) is plated on the surface of the LDS tank, so as to avoid the interference of other metals inside, and the connection circuit of the piezoelectric actuator 40 is connected to the fixed base 14.
  • the conductive plating layer in the LDS tank is connected to lead out the circuit to realize the electrical connection with the circuit board of the photosensitive component 20 .
  • At least two wires are formed in the fixed base, so as to electrically connect the connection circuit of the piezoelectric actuator 40 with the wires so as to derive the circuit, through the
  • the fixed base 14 is electrically connected to the circuit board of the photosensitive assembly 20 .
  • the circuit board of the photosensitive assembly 20 extends upward through the corners of the camera module with the extra space, and conducts circuit connection with the circuit layer of the fixed base 14 , which not only reduces the size of the circuit The length of the board also makes wiring easier.
  • the photosensitive assembly 20 is connected to the piezoelectric actuator 40 in a driving manner.
  • the first actuator 40a is disposed on the anti-shake base 31 and drives the photosensitive assembly 20 to move along the X-axis direction.
  • Optical anti-shake in the X-axis direction is realized; the anti-shake base 31 has a connecting part for movably connecting with the photosensitive component 20, that is, the anti-shake base 31 can drive all parts of the camera through the connecting part when moving.
  • the photosensitive assembly 20 moves in the same direction, the second actuator 40b is disposed on the fixed base 14 and/or the outer frame 32, and drives the anti-shake base 31 relative to the outer frame
  • the body 32 moves along the Y-axis direction, thereby driving the photosensitive assembly 20 to move along the Y-axis direction, so as to realize optical anti-shake in the Y-axis direction.
  • the first actuator 40 a is disposed on a side wall of the anti-shake base 14
  • the first actuator 40 b is fixed on the anti-shake base 31 and drives the photosensitive assembly 20 Move along the X axis. That is, the piezoelectric element 401 of the first stopper 40a is fixed to the anti-vibration base 31 by bonding with an adhesive.
  • an elastic adhesive soft glue
  • the length direction of the drive shaft 43 is consistent with the X direction, and the other end of the drive shaft 43 can also be fixed on the anti-shake base by an elastic adhesive; or, the drive shaft 43 The other end is movably connected (suspended on the anti-shake base 31 or suspended in the air, so as not to affect its repeated vibration), so that the piezoelectric element 401 of the first brake 40a and the drive shaft 43 can vibrate freely.
  • the moving member 44 may be fixed to the photosensitive assembly 20 by means of adhesive bonding, or may be fixed in a direction integrally formed with the photosensitive assembly 20 .
  • the piezoelectric element 401 may also be integrally formed with the anti-shake base.
  • the photosensitive assembly 20 further includes at least one reinforcing sheet 26 , wherein the reinforcing sheet 26 is disposed under the circuit board 22 of the photosensitive assembly 20 , and the photosensitive assembly is supported by the reinforcing sheet 26 . 20 of the circuit board 22 and the photosensitive chip.
  • the circuit board 22 is reinforced by the reinforcing sheet 26, so that the circuit board 22 has good flatness and also has good heat dissipation performance, preventing the circuit board 22 generates heat during the working process, which leads to the deformation of the circuit board, and the reinforcing sheet 26 can be a sheet material with good heat dissipation performance such as a steel sheet.
  • the moving member 44 of the first actuator 40a can be fixed to the reinforcing sheet 26 of the photosensitive assembly 20 by means of adhesive, wherein the first actuator 40a is flattened
  • the reinforcing sheet 26 is the reference plane to ensure the flatness of the first actuator 40a.
  • the second actuator 40b is disposed on a bottom side of the fixed base 14, the second actuator 40b is fixed on the fixed base 14, and drives the anti-shake base 31 along the Y axis direction move. That is, the piezoelectric element 401 of the second stopper 40b is fixed to the bottom surface of the fixing base 14 by adhesive bonding. According to the embodiment of the present application, an elastic adhesive (soft glue) is used.
  • the length direction of the drive shaft 43 is consistent with the Y direction, and the other end of the drive shaft 43 may also be fixed on the fixed base by an elastic adhesive, or the drive shaft 43 may be The other end is movably connected (suspended on the fixed base or suspended in the air, so as not to affect its repeated vibration), so that the piezoelectric element 401 and the drive shaft 43 of the second brake 40b can be freely Just vibrate.
  • the moving member 44 may be fixed to the anti-shake base 31 by means of bonding, or may be fixed in a direction integrally formed with the anti-shake base 31 .
  • the piezoelectric element 401 may be formed integrally with the fixed base. Using the fixing base 14 as a reference surface, fixing the second actuator 40b upward on the fixing base 14 can improve the assembly accuracy of the second actuator 40b, and the The second actuator 40b maintains good flatness.
  • the second actuator 40b may be fixed on the outer frame body 32 by means of adhesive bonding, the longitudinal direction of the drive shaft 43 is consistent with the Y direction, and , the other end of the drive shaft 43 can also be fixed on the outer frame body 32 through an elastic adhesive, or the other end of the drive shaft 43 can be movably connected (suspended on the outer frame body It suffices that the repeated vibration is not affected), and the piezoelectric element 401 and the drive shaft 43 of the second brake 40b can vibrate freely. It can be understood that, the second actuator 40b can also be fixed to the fixed base 14 and the outer frame 32 at the same time.
  • the piezoelectric substrate 41 of the second actuator 40b is fixed to the fixed base 14, that is, all parts of the second actuator 40b are fixed to the fixed base 14.
  • the piezoelectric substrate 41 extends downward from the bottom surface of the fixed base 14 and uses the bottom surface of the fixed base 14 as a reference surface to ensure the flatness of the second actuator 40b. It can be understood that, the piezoelectric substrate 41 can also fix the bottom surface of the fixing base 14 and the inner surface of the outer frame body 32 at the same time.
  • the first actuator 40a is fixed to the reinforcing sheet 26 of the photosensitive assembly 20, and the second actuator 40b is fixed to the The fixed base 14 is described.
  • the first actuator 40a and the second actuator 40b are at adjacent sides or adjacent corners of the anti-shake base 31, the first actuator 40a and the second actuator 40b are respectively installed and extended from different height directions to make full use of the height space of the camera module, thereby making the module structure more compact.
  • both the shown reinforcing sheet and the fixing base have high flatness and can be used as a reference plane, which is beneficial to reduce the assembly time when the first actuator 40a and the second actuator 40b are assembled. tolerance.
  • the camera module further includes at least one anti-shake ball unit, wherein the anti-shake ball unit is disposed between the photosensitive assembly 20 and the anti-shake base 31 for supporting and maintaining the The distance between the anti-shake base 31 and the photosensitive assembly 20, and the movement of the photosensitive assembly 20 relative to the anti-shake base 31 in the X-axis direction, and the sliding friction is replaced by rolling friction, reducing Frictional force of optical components as they move.
  • At least one anti-shake accommodating space 302 is provided between the photosensitive assembly and the anti-shake base 31 , wherein the anti-shake rolling unit is accommodated in the anti-shake accommodating space 302 .
  • the anti-shake ball unit may also be disposed between the photosensitive assembly 20 and the side or bottom of the anti-shake base 31 , which is not limited in this application.
  • the camera module further includes at least one guiding unit, and the guiding unit can provide a guiding function for the movement of the photosensitive assembly 20 .
  • the guide unit includes a first guide unit and a second guide unit, and each group of the guide units is disposed opposite to the piezoelectric actuator 40 .
  • the first guide unit is disposed on the reinforcing sheet 26 of the photosensitive assembly 20, and the first guide unit is disposed opposite to the first actuator 40a, that is, the first guide unit is disposed On one side of the anti-shake base 31 along the X-axis direction, the first actuator 40a is placed on the opposite side of the anti-shake base along the X-axis direction.
  • the second guide unit is disposed on the anti-shake base 31 , and the second guide unit is disposed opposite to the second actuator 40 b , that is, the second guide unit is disposed on the anti-shake base 31
  • the second actuator 40b is placed on the opposite side of the anti-shake base 31 in the Y-axis direction. That is to say, each group of the guide units and the piezoelectric actuator 40 are located on opposite sides and arranged in the same direction.
  • the first guide unit may be a guide rod whose length direction is consistent with the X direction
  • the reinforcing sheet 26 of the photosensitive assembly 20 has at least one opening at the position where the guide rod is set, and the The guide rod is placed in the opening so that the guide rod is movably connected to the photosensitive assembly 20, and the direction of the photosensitive assembly 20 is controlled by the direction of the guide rod, so that the photosensitive assembly 20 can move more accurately along the X-axis direction of movement.
  • the second guide unit can also be a guide rod whose length direction is consistent with the Y direction, the anti-shake base is provided with at least one opening at the position where the guide rod is set, and the guide rod is placed in the opening so that all the The guide rod is movably connected with the anti-shake base, and the direction of the anti-shake base 31 is controlled by the direction of the guide rod, so that the anti-shake base 31 can move more accurately along the Y-axis.
  • Both ends of the first guide unit are fixed on the anti-shake base, so that the anti-shake base 31 can move along the X-axis direction under the guiding action of the first guide unit; the second guide Both ends of the unit are fixed to the fixed base 14 , so that the anti-shake base 31 can move along the Y-axis direction under the guidance of the second guide unit.
  • the guiding unit may be a ball, a sliding block or other structures capable of realizing a guiding function, which is not limited in this application.
  • the module device further includes a casing 50, wherein the casing 50 is used to protect the various components of the camera module, and can also be used to block electromagnetic waves generated by the camera module during operation, thereby producing an electromagnetic shielding effect.
  • the casing 50 can be a metal material, and the casing is grounded through a grounding plate so that the casing can be used as an electromagnetic shield.
  • the material of the casing 50 may be a plastic material, and a conductive material is coated on the surface of the plastic to block electromagnetic waves, so the present application does not limit the material of the casing.
  • the casing 50 has an opening, so that the light passing through the lens assembly 10 can be incident on the photosensitive assembly for imaging, and the casing 50 and the outer frame 32 form a receiving cavity for storing
  • the lens assembly 10 , the photosensitive assembly 20 and the piezoelectric actuator 40 are accommodated therein to prevent the lens assembly 10 , the photosensitive assembly 20 and the piezoelectric actuator 40 from falling off and being damaged due to external impact.
  • the housing 50 is fixed to the upper part of the fixed base 14
  • the outer frame 32 is fixed to the lower part of the fixed base 14 .
  • the first actuator 40a of the piezoelectric actuator 40 of the camera module is disposed on the anti-shake base 31 and the outer frame 32 In between, that is, the piezoelectric substrate 41 of the first actuator 40a is fixed to the outer frame 32, and the drive shaft 43 of the first actuator 40a extends in the X-axis direction.
  • One end of the vibration substrate 42 is connected to the piezoelectric substrate 41 , and the other end of the vibration substrate 42 is connected to the drive shaft 43 , wherein the moving member 44 is in frictional contact with the drive shaft 43 .
  • the moving member 44 is fixed to the anti-shake base, and the anti-shake base 31 is moved in the X direction by driving the vibration substrate 42, thereby driving the photosensitive assembly 20 to move in the X direction,
  • the longitudinal direction of the drive shaft 43 is the same as the X direction.
  • the second actuator 40b of the piezoelectric actuator 40 is disposed between the photosensitive component 20 and the anti-shake base 31, that is, the The piezoelectric substrate 41 of the second actuator 40 b is fixed to the inner side of the anti-shake base 31 and located between the photosensitive element 20 and the anti-shake base 31 .
  • One end of the vibration substrate 42 is connected to the piezoelectric substrate 41 , and the other end of the vibration substrate 42 is connected to the drive shaft 43 , wherein the moving member 44 is in frictional contact with the drive shaft 43 .
  • the moving member 44 is fixed to the photosensitive assembly 20, and the moving member 44 is driven to move in the Y-axis direction by driving the vibrating substrate 42, so as to realize the movement of the photosensitive assembly 20 in the Y-direction, wherein the driving shaft 43
  • the length direction is the same as the Y direction.
  • the second actuator 40b of the piezoelectric actuator 40 extends from the outside of the outer frame 32 to the Inside the outer frame body 32 .
  • the outer frame body 32 is provided with a fixing hole, wherein the second actuator 40b is fixed to the fixing hole of the outer frame body 32, and all the second actuator 40b is fixed to the fixing hole of the outer frame body 32.
  • the piezoelectric substrate 41 is fixed to the outside of the fixing hole.
  • the vibration substrate 42 of the piezoelectric actuator, the moving member 44 and the drive shaft 43 are placed inside the outer frame body 32 through the opening, and the piezoelectric substrate 42 is arranged on the outer frame
  • the outer side of the body 32 that is, the inner surface of the piezoelectric substrate 42 is fixed to the outer side of the outer frame body 32 by adhesive.
  • the arrangement of this embodiment can electrically connect the piezoelectric actuator 40 to the flexible board of the circuit board 22 through a flexible board or a plurality of lead wires, which can conduct conduction from the outside, and the conduction line is simpler.
  • FIG. 8 of the accompanying drawings of the present invention a camera module according to another preferred embodiment of the present invention is explained in the following description.
  • the difference from the above-mentioned preferred embodiment is the installation method of the first actuator 40 a of the piezoelectric actuator 40 .
  • the first actuator 40a is disposed between the photosensitive assembly 20 and the anti-shake base 31, and the first actuator 40a uses the anti-shake base 31 as a supporting point to drive the The photosensitive member 20 moves in the X-axis direction.
  • the piezoelectric substrate 41 of the first actuator 40a is fixed to the photosensitive assembly 20, and the first actuator 40a is electrically connected to the circuit board 22 of the photosensitive assembly 20, That is, the first actuator 40a is electrically connected to the photosensitive assembly 20 .
  • the piezoelectric substrate 41 of the first actuator 40a is fixed to the circuit board 22, and the moving member 44 of the first actuator 40a and the anti-shake base 31 connected in a phase-driven manner.
  • the circuit board 22 of the photosensitive assembly 20 provides a pulse voltage to the vibrating substrate 42, so that the vibrating substrate 42 provides the drive shaft 43 in the X-axis vibration in the direction.
  • the drive shaft 43 slightly reciprocates in the X-axis direction, thereby driving the moving member 44 to linearly move along the X-axis direction on the drive shaft 43, and the piezoelectric substrate 41 drives the
  • the photosensitive assembly 20 moves relative to the anti-shake base along the X-axis direction to realize optical anti-shake in the X-axis direction.
  • the arrangement of the first actuator 40a in this embodiment can electrically connect the vibrating substrate 42 to the circuit board, no flexible board or leads are required, and the conduction method is simpler.
  • the electronic device includes an electronic device main body 100 and at least one camera module 200 , wherein the camera module is mounted on the electronic device main body 100 and provided by the electronic device main body 100 and the camera module 200 . electrical energy.
  • the camera module 200 is electrically connected to the electronic device main body 100 . It is worth mentioning that, in this preferred embodiment of the present invention, the camera module 200 has the same structure and function as the camera module in the above-mentioned preferred embodiment, which is not repeated here.
  • the electronic device body 100 may be, but not limited to, a mobile phone, a computer, a tablet computer, a smart camera device, and the like.
  • the present invention further provides an optical anti-shake method for a camera module.
  • the optical anti-shake method includes the following steps:
  • the at least one piezoelectric actuator expands or contracts based on the potential signal, so as to drive the photosensitive component to move along the X-axis direction and/or the Y-axis direction, so as to realize the optical anti-shake of the camera module.
  • the step (b) of the optical anti-shake method further includes, the piezoelectric actuator includes a piezoelectric substrate and a vibration substrate disposed on the piezoelectric substrate , applying the potential signal to a piezoelectric substrate through a vibration substrate of the piezoelectric actuator, wherein the piezoelectric substrate expands or contracts based on the potential signal, and drives the vibration substrate to expand or contract to deform.
  • the piezoelectric actuator further includes a driving shaft and a moving member in frictional contact with the driving shaft, wherein the driving shaft is driven by the vibration substrate, and the moving member is driven by the driving shaft to move.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Adjustment Of Camera Lenses (AREA)
  • Studio Devices (AREA)

Abstract

La présente invention concerne un module de caméra, un procédé anti-tremblement optique associé, et un dispositif électronique. Au moins un actionneur piézoélectrique est relié en transmission à l'ensemble photosensible. L'actionneur piézoélectrique comprend un élément piézoélectrique, un arbre d'entraînement et un élément mobile. Une extrémité de l'élément piézoélectrique est fixée, et l'arbre d'entraînement est disposé sur l'élément piézoélectrique. L'arbre d'entraînement est en contact de frottement avec l'élément mobile. L'élément piézoélectrique entraîne l'arbre d'entraînement, et l'arbre d'entraînement entraîne l'élément mobile par frottement, de telle sorte que l'actionneur piézoélectrique entraîne l'ensemble photosensible à se déplacer dans une direction d'axe X et/ou une direction d'axe Y de façon à réaliser un anti-tremblement optique du module de caméra.
PCT/CN2022/073679 2021-02-05 2022-01-25 Module de caméra, procédé anti-tremblement optique associé, et dispositif électronique WO2022166677A1 (fr)

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CN101067709A (zh) * 2006-05-02 2007-11-07 三星Techwin株式会社 图像抖动校正设备和方法
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JP2008145894A (ja) * 2006-12-12 2008-06-26 Sony Corp 撮像装置、移動装置及び圧電バイモルフアクチュエータ
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CN212135043U (zh) * 2020-03-17 2020-12-11 睿恩光电有限责任公司 具有光学防抖功能的透镜驱动装置、相机装置及电子设备

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JP4116185B2 (ja) * 1999-04-22 2008-07-09 株式会社リコー 撮像装置
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CN101067709A (zh) * 2006-05-02 2007-11-07 三星Techwin株式会社 图像抖动校正设备和方法
CN101093288A (zh) * 2006-06-19 2007-12-26 三星Techwin株式会社 用于数码相机的手抖动校正模块
JP2008145894A (ja) * 2006-12-12 2008-06-26 Sony Corp 撮像装置、移動装置及び圧電バイモルフアクチュエータ
CN111399163A (zh) * 2020-03-17 2020-07-10 睿恩光电有限责任公司 具有光学防抖功能的透镜驱动装置、相机装置及电子设备
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CN116802549A (zh) 2023-09-22
CN114885088B (zh) 2024-01-26

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