CN110275366B - Lens driving device - Google Patents
Lens driving device Download PDFInfo
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- CN110275366B CN110275366B CN201910338096.5A CN201910338096A CN110275366B CN 110275366 B CN110275366 B CN 110275366B CN 201910338096 A CN201910338096 A CN 201910338096A CN 110275366 B CN110275366 B CN 110275366B
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- 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
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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
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- Engineering & Computer Science (AREA)
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- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Adjustment Of Camera Lenses (AREA)
- Lens Barrels (AREA)
Abstract
The invention provides a lens driving device, which comprises a hollow quadrilateral frame, a driving block and a driving arm, wherein the driving block and the driving arm are positioned in the frame and are spaced from the frame; the first driving arm drives the driving block to move along a first direction; the second driving arm drives the driving block to move along a second direction; the third driving arm drives the driving block to move along a first direction; the fourth driving arm drives the driving block to move along a second direction; wherein the first direction and the second direction are perpendicular to each other; the frame, the driving block and the driving arm are all made of non-magnetic materials. Compared with the related art, the lens driving device has the advantages of high stability and reliability, small occupied space, low power consumption and low cost.
Description
[ technical field ] A method for producing a semiconductor device
The present disclosure relates to driving devices, and particularly to a lens driving device for a portable electronic device.
[ background of the invention ]
With the development of imaging technology, lens driving devices have been widely used in various imaging devices. The combination of a lens driving device with various portable electronic devices such as a mobile phone, a video camera, a computer, etc. is more popular among consumers.
The lens driving device in the related art comprises a base, a support frame fixed on the base, a lens barrel accommodated in the support frame, an elastic sheet suspending the lens barrel in the support frame, and magnetic steel and a coil which are respectively fixed on the lens barrel and the support frame, wherein the magnetic steel and the coil are matched to drive the lens barrel to move so as to realize focusing. The related art lens driving apparatus needs to satisfy not only the AF auto-focusing function but also the OIS anti-shake function, and thus needs to be assembled with an AF driving coil and an OIS anti-shake coil.
However, in order to achieve the above purpose, an additional supporting structure is required to be added to support the coil for the OIS anti-shake function, and the structure in which the coil and the magnetic steel are driven in cooperation not only occupies a large volume and is expensive in production cost, but also is susceptible to failure due to magnetic field interference, thereby reducing reliability and stability of the lens driving device.
Therefore, there is a need to provide an improved lens driving apparatus to solve the above problems.
[ summary of the invention ]
The invention aims to provide a lens driving device which is high in stability and reliability, small in occupied space, low in power consumption and low in cost.
To solve the above technical problem, the present invention provides a lens driving device, including: the frame is of a hollow quadrilateral structure; the driving block is positioned in the frame and is arranged at an interval with the frame, and the driving block is used for clamping and fixing the lens module; the driving arms comprise a first driving arm, a second driving arm, a third driving arm and a fourth driving arm, one end of each driving arm is fixed to the frame, the other end of each driving arm is fixed to the driving block, the third driving arm is arranged opposite to the first driving arm, and the fourth driving arm is arranged opposite to the first driving arm; the first driving arm is telescopically deformed along a first direction to drive the driving block to move along the first direction; the second driving arm is telescopically deformed along a second direction to drive the driving block to move along the second direction; the third driving arm is telescopically deformed along the first direction to drive the driving block to move along the first direction; the fourth driving arm is telescopically deformed along a second direction to drive the driving block to move along the second direction; the first direction and the second direction are perpendicular to each other, and a plane enclosed by the first direction and the second direction is parallel to a plane where the frame is located; the frame, the driving block and the driving arm are all made of non-magnetic materials.
Preferably, the lens driving device further includes a displacement detecting device for detecting a change in displacement of the driving block, and the displacement detecting device includes a first detecting device corresponding to the first driving arm, a second detecting device corresponding to the second driving arm, a third detecting device corresponding to the third driving arm, and a fourth detecting device corresponding to the fourth driving arm.
Preferably, the driving arm is made of a piezoelectric material or a memory alloy material, and is triggered to stretch and deform by accessing a control electric signal.
Preferably, the driving block is made of a semiconductor silicon material.
Preferably, the driving arms are elastic arms, and each driving arm has a saw-toothed or wavy cross section.
Preferably, the detection device is the driving arm, the first driving arm serves as the first detection device, the second driving arm serves as the second detection device, the third driving arm serves as the third detection device, and the fourth driving arm serves as the fourth detection device.
Preferably, the frame comprises a first wall and a third wall which are arranged at intervals along a first direction, and a second wall and a fourth wall which are arranged at intervals along a second direction, wherein the first wall, the second wall, the third wall and the fourth wall are sequentially connected end to jointly enclose a rectangular structure; the deformation direction of the first driving arm is parallel to the first wall, the deformation direction of the second driving arm is parallel to the second wall, the deformation direction of the third driving arm is parallel to the third wall, and the deformation direction of the fourth driving arm is parallel to the fourth wall.
Preferably, the driving block comprises a rectangular body and a through hole penetrating through the body and used for clamping the lens module, the body comprises a first edge, a second edge, a third edge and a fourth edge which are sequentially connected end to end, the first edge is spaced and parallel to the first wall, the second edge is spaced and parallel to the second wall, the third edge is spaced and parallel to the third wall, and the fourth edge is spaced and parallel to the fourth wall; one end of the first driving arm is fixed on the fourth wall, and the other end of the first driving arm is fixed on the first edge; one end of the second driving arm is fixed on the first wall, and the other end of the second driving arm is fixed on the second edge; one end of the third driving arm is fixed on the second wall, and the other end of the third driving arm is fixed on the third edge; one end of the fourth driving arm is fixed on the third wall, and the other end of the fourth driving arm is fixed on the fourth edge.
Preferably, the frame further comprises a plurality of first adjusting positive plates arranged at intervals and extending from the first wall to the first edge, and a plurality of second adjusting positive plates arranged at intervals and extending from the second wall to the second edge; the driving block further comprises a plurality of first adjusting negative plates which are arranged at intervals and extend from the first edge to the first wall, and a plurality of second adjusting negative plates which are arranged at intervals and extend from the second edge to the second wall, and the first adjusting positive plates and the first adjusting negative plates are mutually staggered and inserted and mutually spaced; the second adjusting positive plates and the second adjusting negative plates are mutually staggered and inserted and are mutually spaced; one end of the first driving arm is fixed on the fourth wall, and the other end of the first driving arm is fixed on the first adjusting negative plate close to the fourth wall; one end of the second driving arm is fixed on the first wall, and the other end of the second driving arm is fixed on the second adjusting negative plate close to the first wall.
Preferably, the frame further comprises a plurality of third adjusting positive plates arranged at intervals and extending from the third wall to the third edge, and a plurality of fourth adjusting positive plates arranged at intervals and extending from the fourth wall to the fourth edge; the driving block further comprises a plurality of third adjusting negative plates which are arranged at intervals and extend from the third side to the third wall, and a plurality of fourth adjusting negative plates which are arranged at intervals and extend from the fourth side to the fourth wall, and the third adjusting positive plates and the third adjusting negative plates are mutually staggered and inserted and mutually spaced; the fourth adjusting positive plate and the fourth adjusting negative plate are mutually staggered and inserted and are mutually spaced; one end of the third driving arm is fixed on the second wall, and the other end of the third driving arm is fixed on the third adjusting negative plate close to the second wall; one end of the fourth driving arm is fixed to the third wall, and the other end of the fourth driving arm is fixed to the fourth adjusting negative plate close to the third wall.
Preferably, the first adjusting positive plate and the first adjusting negative plate form a first capacitance structure, the second adjusting positive plate and the second adjusting negative plate form a second capacitance structure, the third adjusting positive plate and the third adjusting negative plate form a third capacitance structure, and the fourth adjusting positive plate form a fourth capacitance structure.
Preferably, the detection device is a capacitor structure, the first capacitor structure serves as the first detection device, the second capacitor structure serves as the second detection device, the third capacitor structure serves as the third detection device, and the fourth capacitor structure serves as the fourth detection device.
Preferably, the frame, the driving block and the driving arm are made of a MEMS process.
Preferably, the width direction of the driving arm is parallel to a third direction, and the first direction, the second direction and the third direction are perpendicular to each other two by two.
Compared with the prior art, in the lens driving device, the driving block is connected to the first driving arm, the third driving arm, the second driving arm and the fourth driving arm of the frame to be deformed in a telescopic manner so as to drive the driving block to move in a positive direction and a negative direction along a first direction and in a positive direction and a negative direction along a second direction, and to drive the driving block to slightly rotate on a plane where the first direction and the second direction are located, so that the OIS anti-shake function is realized, wherein the first direction and the second direction are perpendicular to each other; the structure is simple, the occupied size is small, the production cost is low, the driving arm can stretch and retract to generate driving force through different signals, the control is convenient, and the power consumption is low; and the driving arm, the driving block and the frame are all made of non-magnetic materials, so that magnetic field interference is avoided, and the reliability and stability are better.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
fig. 1 is a schematic perspective view of a lens driving device according to the present invention;
fig. 2 is a top view of the lens driving device of the present invention.
[ detailed description ] embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a lens driving apparatus 100, which includes a frame 1, a driving block 2, a driving arm 3, and a position detecting device (not numbered). In this embodiment, for convenience of description, an XYZ axis three-dimensional coordinate system is established, and a first direction is defined as an X axis direction, a second direction is defined as a Y axis direction, and a third direction is defined as a Z axis direction, where each of the first direction, the second direction, and the third direction is perpendicular to each other, and the Z axis direction is an optical axis direction.
The frame 1 has a hollow structure, such as a hollow quadrilateral structure. In the present embodiment, the frame 1 is illustrated as a hollow rectangle.
Specifically, the frame 1 includes first and third walls 11 and 13 spaced apart in a first direction and second and fourth walls 12 and 14 spaced apart in a second direction. The first wall 11, the second wall 12, the third wall 13 and the fourth wall 14 are sequentially connected end to jointly form a rectangular structure.
The driving block 2 is positioned in the frame 1 and spaced from the frame 1, and the driving block 2 is used for clamping and fixing the lens module, so that an OIS (optical Image stabilization) Image stabilization function of the lens module, namely anti-shake function, is realized.
In this embodiment, the driving block 2 includes a rectangular body 21 and a through hole 22 penetrating through the body 21 for clamping the lens module. Specifically, the body 21 includes a first side 211, a second side 212, a third side 213 and a fourth side 214 connected end to end in sequence. The first side 211 is spaced from and parallel to the first wall 11, the second side 212 is spaced from and parallel to the second wall 12, the third side 213 is spaced from and parallel to the third wall 13, and the fourth side 214 is spaced from and parallel to the fourth wall 14.
The driving arm 3 includes a first driving arm 31 having one end fixed to the frame 1 and the other end fixed to the driving block 2, a second driving arm 32, a third driving arm 33 disposed opposite to the first driving arm 31, and a fourth driving arm 34 disposed opposite to the second driving arm 32.
The deformation direction of the first driving arm 31 is parallel to the first wall 11, one end of the first driving arm 31 is fixed to the fourth wall 14, and the other end is fixed to the first edge 211. The first driving arm 31 is deformed in a first direction to drive the driving block 2 to move in the first direction.
The deformation direction of the second driving arm 32 is parallel to the second wall 12, and one end of the second driving arm 32 is fixed to the first wall 11, and the other end is fixed to the second edge 212. The second driving arm 32 is deformed in a second direction to drive the driving block 2 to move in the second direction.
The deformation direction of the third driving arm 33 is parallel to the third wall 13, and one end of the third driving arm 33 is fixed to the second wall 12, and the other end is fixed to the third edge 213. The third driving arm 33 is deformed in a first direction to drive the driving block 2 to move in the first direction.
The deformation direction of the fourth driving arm 34 is parallel to the fourth wall 14, one end of the fourth driving arm 34 is fixed to the third wall 13, and the other end is fixed to the fourth edge 214. The fourth driving arm 34 is deformed in a second direction to drive the driving block to move in the second direction.
For example, in the present embodiment, the first driving arm 31 drives the driving block 2 to move in the forward direction (X-axis forward direction) of the first direction; the third driving arm 33 drives the driving block 2 to move along the negative direction (X-axis negative direction) of the first direction; the second driving arm 32 drives the driving block 2 to move in the forward direction (Y-axis forward direction) of the second direction; the fourth drive arm 34 drives the drive block 2 to move in the negative direction of the second direction (the Y-axis negative direction). The driving direction stability is higher.
It should be noted that the driving directions of the first driving arm 31 and the third driving arm 33 may be the same, that is, when the first driving arm is compressed, the third driving arm is stretched to move the driving block in one direction; the driving directions of the second driving arm 32 and the fourth driving arm 34 may be the same, that is, when the second driving arm is compressed, the fourth driving arm is extended to move the driving block in one direction.
The first direction and the second direction are perpendicular to each other, and a plane enclosed by the first direction and the second direction is parallel to a plane where the frame 1 is located. The first driving arm 31, the second driving arm 32, the third driving arm 33 and the fourth driving arm 34 drive the driving block 2 to move in the positive direction and the negative direction of the first direction, and to move in the positive direction and the negative direction of the second direction and to slightly rotate in a plane where the first direction and the second direction are located, so that an anti-shake function is realized. The driving arm is telescopic to generate driving force through different signals, and is convenient to control and low in power consumption.
In the present embodiment, the frame 1, the driving block 2, and the driving arm 3 are made of a non-magnetic material. The structure arrangement avoids magnetic field interference when the driving arm 3 drives the driving block 2 to move, and the reliability and stability are better.
Specifically, the driving arm 3 is made of a piezoelectric material or a memory alloy material, and is triggered to stretch and deform by accessing a control electric signal so as to realize an anti-shake function. The driving block 2 is made of semiconductor silicon material, and is integrally prevented from being interfered by a magnetic field. The frame 1, the driving block 2 and the driving arm 3 are made by an MEMS process, so that the purposes of simple structure and small occupied volume are achieved.
In the present embodiment, the driving arms 3 are elastic arms, and each driving arm 3 has a saw-toothed or wavy cross section. Preferably, the width direction of the driving arm 3 is parallel to the third direction. The above structure allows the driving arm 3 to provide support for the driving block 2 in the third direction (Z-axis direction) and to move in the first direction (X-axis direction) and the second direction (Y-axis direction) by a certain amount. Preferably, in the present embodiment, the frame 1 further includes a plurality of first adjustment front plates 111 spaced from each other and extending from the first wall 11 to the first side 211, a plurality of second adjustment front plates 112 spaced from each other and extending from the second wall 12 to the second side 212, a plurality of third adjustment front plates 113 spaced from each other and extending from the third wall 13 to the third side 213, and a plurality of fourth adjustment front plates 114 spaced from each other and extending from the fourth wall 14 to the fourth side 214.
The driving block 2 further comprises a plurality of first adjusting negative plates 23 arranged at intervals from the first side 211 to the first wall 11, a plurality of second adjusting negative plates 24 arranged at intervals from the second side 212 to the second wall 12, a plurality of third adjusting negative plates 25 arranged at intervals from the third side 213 to the third wall 13, and a plurality of fourth adjusting negative plates 26 arranged at intervals from the fourth side 214 to the fourth wall 14.
The first adjusting positive plates 111 and the first adjusting negative plates 23 are inserted in a staggered manner and spaced from each other; the second adjusting positive plates 112 and the second adjusting negative plates 24 are inserted in a staggered manner and spaced from each other; the third adjusting positive plates 113 and the third adjusting negative plates 25 are inserted in a staggered manner and spaced from each other; the fourth adjusting positive plate 114 and the fourth adjusting negative plate 26 are interleaved and spaced from each other. In the above arrangement, only the first positive adjustment plate 111 and the first negative adjustment plate 23, and only the second positive adjustment plate 112 and the second negative adjustment plate 24 may be provided; or only the third regulating positive plate 113 and the third regulating negative plate 25, and the fourth regulating positive plate 114 and the fourth regulating negative plate 26 may be provided. The arrangement of the structure is used for providing the freedom of movement and the limit of the driving block 2 in the first direction and the second direction.
Preferably, the first adjusting positive plate 111 and the first adjusting negative plate 23 form a first capacitance structure, the second adjusting positive plate 112 and the second adjusting negative plate 24 form a second capacitance structure, the third adjusting positive plate 113 and the third adjusting negative plate 25 form a third capacitance structure, and the fourth adjusting positive plate 114 and the fourth adjusting positive plate 26 form a fourth capacitance structure.
The arrangement corresponding to the driving arm 3 is specifically as follows: the first driving arm 31 has one end fixed to the fourth wall 14 and the other end fixed to the first negative adjustment plate 23 close to the fourth wall 14, that is, indirectly fixed to the first edge 211; the second driving arm 32 has one end fixed to the first wall 11 and the other end fixed to the second adjustment negative plate 24 close to the first wall 11, i.e. indirectly fixed to the second edge 212. The third driving arm 33 has one end fixed to the second wall 12 and the other end fixed to the third adjustment negative plate 25 close to the second wall 12, that is, indirectly fixed to the third edge 213; the fourth driving arm 34 is fixed to the third wall 13 at one end and to the fourth adjustment negative plate 26 close to the third wall 13 at the other end, i.e., indirectly fixed to the fourth edge 214.
The detection device is used for detecting the displacement change of the driving block 2, so that data can be fed back to the processor, and the processor can readjust according to the fed-back data, so that the displacement of the driving block 2 can be accurately adjusted.
In the present embodiment, the displacement detecting means includes a first detecting means corresponding to the first drive arm 31, a second detecting means corresponding to the second drive arm 32, a third detecting means corresponding to the third drive arm 33, and a fourth detecting means corresponding to the fourth drive arm 34.
For example, the detection device is the driving arm 3, that is, the driving arm 3 itself serves as the detection device, in this case, the first driving arm 31 serves as the first detection device, the second driving arm 32 serves as the second detection device, the third driving arm 33 serves as the third detection device, and the fourth driving arm 34 serves as the fourth detection device.
For example, the detection device is another set of driving arms, and in this case, two driving arms are disposed in each pass of the frame, one driving arm serves as a detection device for detecting the displacement of the driving block and outputting a signal, and the other driving arm serves as a driving device for receiving the signal and driving the driving block to displace.
For another example, the detecting device is a capacitor structure, the first capacitor structure serves as the first detecting device, the second capacitor structure serves as the second detecting device, the third capacitor structure serves as the third detecting device, and the fourth capacitor structure serves as the fourth detecting device. This is also possible, as the principle of detection for feedback regulation is the same.
Compared with the prior art, in the lens driving device, the driving block is connected to the first driving arm, the third driving arm, the second driving arm and the fourth driving arm of the frame to be deformed in a telescopic manner so as to drive the driving block to move in a positive direction and a negative direction along a first direction and in a positive direction and a negative direction along a second direction, and to drive the driving block to slightly rotate on a plane where the first direction and the second direction are located, so that the OIS anti-shake function is realized, wherein the first direction and the second direction are perpendicular to each other; the structure is simple, the occupied size is small, the production cost is low, the driving arm can stretch and retract to generate driving force through different signals, the control is convenient, and the power consumption is low; and the driving arm, the driving block and the frame are all made of non-magnetic materials, so that magnetic field interference is avoided, and the reliability and stability are better.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (11)
1. A lens driving apparatus, comprising:
the frame is of a hollow quadrilateral structure;
the driving block is positioned in the frame and is arranged at an interval with the frame, and the driving block is used for clamping and fixing the lens module; and
the driving arms comprise a first driving arm, a second driving arm, a third driving arm and a fourth driving arm, one end of each driving arm is fixed to the frame, the other end of each driving arm is fixed to the driving block, the third driving arm is arranged opposite to the first driving arm, and the fourth driving arm is arranged opposite to the second driving arm; the first driving arm is telescopically deformed along a first direction to drive the driving block to move along the first direction; the second driving arm is telescopically deformed along a second direction to drive the driving block to move along the second direction; the third driving arm is telescopically deformed along the first direction to drive the driving block to move along the first direction; the fourth driving arm is telescopically deformed along a second direction to drive the driving block to move along the second direction; the first direction and the second direction are perpendicular to each other, and a plane enclosed by the first direction and the second direction is parallel to a plane where the frame is located;
the frame comprises a first wall and a third wall which are arranged at intervals along a first direction, and a second wall and a fourth wall which are arranged at intervals along a second direction, wherein the first wall, the second wall, the third wall and the fourth wall are sequentially connected end to jointly enclose a rectangular structure; the deformation direction of the first driving arm is parallel to the first wall, the deformation direction of the second driving arm is parallel to the second wall, the deformation direction of the third driving arm is parallel to the third wall, and the deformation direction of the fourth driving arm is parallel to the fourth wall;
the driving block comprises a rectangular body and a through hole which penetrates through the body and is used for clamping the lens module, the body comprises a first edge, a second edge, a third edge and a fourth edge which are sequentially connected end to end, the first edge is spaced and parallel to the first wall, the second edge is spaced and parallel to the second wall, the third edge is spaced and parallel to the third wall, and the fourth edge is spaced and parallel to the fourth wall; one end of the first driving arm is fixed on the fourth wall, and the other end of the first driving arm is fixed on the first edge; one end of the second driving arm is fixed on the first wall, and the other end of the second driving arm is fixed on the second edge; one end of the third driving arm is fixed on the second wall, and the other end of the third driving arm is fixed on the third edge; one end of the fourth driving arm is fixed on the third wall, and the other end of the fourth driving arm is fixed on the fourth edge;
the frame further comprises a plurality of first adjusting positive plates arranged at intervals and extending from the first wall to the first edge, and a plurality of second adjusting positive plates arranged at intervals and extending from the second wall to the second edge; the driving block further comprises a plurality of first adjusting negative plates which are arranged at intervals and extend from the first edge to the first wall, and a plurality of second adjusting negative plates which are arranged at intervals and extend from the second edge to the second wall, and the first adjusting positive plates and the first adjusting negative plates are mutually staggered and inserted and mutually spaced; the second adjusting positive plates and the second adjusting negative plates are mutually staggered and inserted and are mutually spaced; one end of the first driving arm is fixed on the fourth wall, and the other end of the first driving arm is fixed on the first adjusting negative plate close to the fourth wall; one end of the second driving arm is fixed on the first wall, and the other end of the second driving arm is fixed on the second adjusting negative plate close to the first wall;
the frame, the driving block and the driving arm are all made of non-magnetic materials.
2. A lens driving device according to claim 1, further comprising displacement detecting means for detecting a change in displacement of the driving block, the displacement detecting means including first detecting means corresponding to the first driving arm, second detecting means corresponding to the second driving arm, third detecting means corresponding to the third driving arm, and fourth detecting means corresponding to the fourth driving arm.
3. A lens driving device as claimed in claim 1, wherein the driving arm is made of piezoelectric material or memory alloy material, and is actuated to deform telescopically by receiving a control electrical signal.
4. The lens driving device according to claim 1, wherein the driving block is made of a semiconductor silicon material.
5. A lens driving device according to claim 2, wherein the driving arms are elastic arms, each of which has a saw-tooth or wave-like cross section.
6. A lens driving device according to claim 5, wherein the detecting means is the driving arm, the first driving arm functions as the first detecting means, the second driving arm functions as the second detecting means, the third driving arm functions as the third detecting means, and the fourth driving arm functions as the fourth detecting means.
7. A lens driving apparatus according to claim 2, wherein the frame further includes a plurality of third regulating positive plates provided at intervals from each other and extending from the third wall toward the third side, and a plurality of fourth regulating positive plates provided at intervals from each other and extending from the fourth wall toward the fourth side; the driving block further comprises a plurality of third adjusting negative plates which are arranged at intervals and extend from the third side to the third wall, and a plurality of fourth adjusting negative plates which are arranged at intervals and extend from the fourth side to the fourth wall, and the third adjusting positive plates and the third adjusting negative plates are mutually staggered and inserted and mutually spaced; the fourth adjusting positive plate and the fourth adjusting negative plate are mutually staggered and inserted and are mutually spaced; one end of the third driving arm is fixed on the second wall, and the other end of the third driving arm is fixed on the third adjusting negative plate close to the second wall; one end of the fourth driving arm is fixed to the third wall, and the other end of the fourth driving arm is fixed to the fourth adjusting negative plate close to the third wall.
8. The lens driving device according to claim 7, wherein the first adjustment positive plate and the first adjustment negative plate form a first capacitance structure, the second adjustment positive plate and the second adjustment negative plate form a second capacitance structure, the third adjustment positive plate and the third adjustment negative plate form a third capacitance structure, and the fourth adjustment positive plate form a fourth capacitance structure.
9. A lens driving apparatus according to claim 8, wherein said detecting means is a capacitive structure, said first capacitive structure serves as said first detecting means, said second capacitive structure serves as said second detecting means, said third capacitive structure serves as said third detecting means, and said fourth capacitive structure serves as said fourth detecting means.
10. The lens driving device according to claim 1, wherein the frame, the driving block, and the driving arm are made by a MEMS process.
11. A lens driving apparatus according to claim 1, wherein a width direction of the driving arm is parallel to a third direction, and the first direction, the second direction and the third direction are perpendicular to each other two by two.
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| CN201910338096.5A CN110275366B (en) | 2019-04-25 | 2019-04-25 | Lens driving device |
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| CN201910338096.5A CN110275366B (en) | 2019-04-25 | 2019-04-25 | Lens driving device |
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| JP2006276224A (en) * | 2005-03-28 | 2006-10-12 | Sony Corp | Lens drive mechanism, lens unit and imaging apparatus |
| JP2007192847A (en) * | 2006-01-17 | 2007-08-02 | Nikon Corp | Driving gear of optical equipment, lens barrel, and camera system |
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| CN108292074A (en) * | 2015-12-08 | 2018-07-17 | 剑桥机电有限公司 | Control to SMA actuation means |
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| CN110275366A (en) | 2019-09-24 |
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