CN109061829A - Lens driving apparatus and camera module - Google Patents
Lens driving apparatus and camera module Download PDFInfo
- Publication number
- CN109061829A CN109061829A CN201811070509.8A CN201811070509A CN109061829A CN 109061829 A CN109061829 A CN 109061829A CN 201811070509 A CN201811070509 A CN 201811070509A CN 109061829 A CN109061829 A CN 109061829A
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- China
- Prior art keywords
- support
- bracket
- driving apparatus
- lens driving
- drive module
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000003287 optical effect Effects 0.000 claims abstract description 45
- 238000006073 displacement reaction Methods 0.000 claims abstract description 12
- 239000000919 ceramic Substances 0.000 claims description 19
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 8
- 239000000463 material Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- -1 spring Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
-
- 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
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power 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
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
Abstract
The invention discloses a kind of lens driving apparatus and camera module, the first drive module connects first support and second support and forms gap therebetween, and driving line connection third bracket and second support, elastic component are set between third bracket and second support.It controls first drive module by applying driving signal to the first drive module and/or driving line and/or drives the controlled flexible spacing to drive the first support and second support along optical axis direction to relatively move and/or control the third bracket and the second support of line.Thus the coarse adjustment being displaced between bracket not only may be implemented but also the accurate adjustment of displacement may be implemented, improve the Adjustment precision being displaced between bracket, and then improve the focusing accuracy of optical lens group.
Description
Technical field
The present invention relates to camera application fields, and in particular to a kind of lens driving apparatus and camera module.
Background technique
In a mobile device, it is typically provided with the camera module for taking pictures or recording a video.In addition to being used in camera module
Photosensitive photosensitive element (such as imaging sensor) can also include optical lens group.In the high-end camera module in part, optics
Lens group can do the movement parallel or perpendicular to photosensitive element light-receiving surface, to offset since equipment shakes caused image
Shake or carry out auto-focusing.Traditional optical image stabilizing system or optical anti-vibration system is usually that voice coil motor is used to drive
Lens bracket is realized.But voice coil motor structure is complicated, is difficult to realize slimming；There are a large amount of magnetic in voice coil motor simultaneously
Iron close is interfered with each other in multimode group in use, being easy to appear side by side.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of lens driving apparatus and camera module, optical lens can be improved
The focusing accuracy of group.
According to a first aspect of the embodiments of the present invention, a kind of lens driving apparatus is provided, comprising:
First support, for fixing optical lens group；
Second support and third bracket；
At least one first drive module connects the first support and second support and forms gap therebetween,
First drive module is configured as controlled flexible to drive the first support and second support along the opposite shifting of optical axis direction
It is dynamic；And
At least one second drive module is configured as controlled flexible to drive the second support and third bracket along institute
State optical axis direction relative movement；
Wherein, second drive module includes the elastic component being set between third bracket and second support and connection institute
State the driving line of third bracket and the second support, the driving line is controlled flexible to control the third bracket and described the
The spacing of two brackets；
The displacement accuracy of first drive module controlled flexible the driving first support and second support relative movement
It is different from the controlled flexible displacement accuracy for driving the second support and third bracket to relatively move of the driving line.
Preferably, the lens driving apparatus further include:
At least two guide rods, one end are fixedly connected with the third bracket；
Wherein, the second support is provided at least two guide holes, and the other end of the guide rod passes through corresponding institute
Guide hole is stated, the second support and the third bracket is guided to relatively move along optical axis direction.
Preferably, the first support is provided with hole, the institute of the first support in the relative position with the guide hole
Hole is stated to be sheathed in a manner of it can be movable relatively on the guide rod.
Preferably, the elastic component is spring, is sheathed on the guide rod.
Preferably, the driving line both ends are fixed on the third bracket, and middle section is fixed on the second support
On；Alternatively,
The driving line both ends are fixed in the second support, and middle section is fixed on the third bracket
Preferably, the lens driving apparatus further include:
Prestressing force adjusting screw, detachably connected with the second support, the driving line bypasses the prestressing force tune
Whole screw is connect with the second support.
Preferably, the end of the prestressing force adjusting screw is round variable section structure.
Preferably, the second support is provided with wire lead slot, guides the driving line.
Preferably, the lens driving apparatus further include:
At least two first electrodes are fixedly connected with the third bracket or the second support, and the two of the driving line
End is electrically connected with corresponding first electrode respectively, is stretched for receiving driving signal.
Preferably, the first electrode has elasticity；
The third bracket includes the first component and second component, and the two surrounds to form accommodating space, described for accommodating
First electrode.
Preferably, the first electrode has elasticity；
The second support includes third member and the 4th component, and the two surrounds to form accommodating space, described for accommodating
First electrode.
Preferably, which is characterized in that first drive module is piezoelectric ceramic piece or stacks type piezoelectric ceramics, the drive
Moving-wire is shape memory alloy wire.
Preferably, the second support and third bracket have guide channel；
The lens driving apparatus further include:
At least two second electrodes are electrically connected to first drive module across the guide channel.
According to a second aspect of the embodiments of the present invention, a kind of camera module is provided, comprising:
Mirror head outer shell；
Lens driving apparatus as described in relation to the first aspect is set in the mirror head outer shell；
Optical lens group is set in the lens driving apparatus；
Photosensitive element is oppositely arranged with the optical lens group.
The embodiment of the invention discloses a kind of lens driving apparatus and camera module, the first drive module connects first support
Gap is formed with second support and therebetween, and driving line connection third bracket and second support, elastic component are set to third
Between bracket and second support.First driving is controlled by applying driving signal to the first drive module and/or driving line
Module and/or driving line are controlled flexible to drive the first support and second support to relatively move and/or control along optical axis direction
Make the spacing of the third bracket and the second support.Thus the coarse adjustment being displaced between bracket not only may be implemented but also may be implemented
The accurate adjustment of displacement improves the Adjustment precision being displaced between bracket, and then improves the focusing accuracy of optical lens group.
Detailed description of the invention
By referring to the drawings to the description of the embodiment of the present invention, the above and other purposes of the present invention, feature and
Advantage will be apparent from, in the accompanying drawings:
Fig. 1 is the stereoscopic schematic diagram of the lens driving apparatus of the embodiment of the present invention；
Fig. 2 is the main view of the lens driving apparatus of the embodiment of the present invention；
Fig. 3 is the left view of the lens driving apparatus of the embodiment of the present invention；
Fig. 4 is that the driving line of the embodiment of the present invention bypasses the main view of prestressing force adjusting screw；
Fig. 5 is that the driving line of the embodiment of the present invention bypasses the top view of prestressing force adjusting screw；
Fig. 6 is the structural schematic diagram of the lens driving apparatus of the embodiment of the present invention；
Fig. 7 is the structural schematic diagram of the camera module of the embodiment of the present invention.
Specific embodiment
Below based on embodiment, present invention is described, but the present invention is not restricted to these embodiments.Under
Text is detailed to describe some specific detail sections in datail description of the invention.Do not have for a person skilled in the art
The present invention can also be understood completely in the description of these detail sections.In order to avoid obscuring essence of the invention, well known method, mistake
There is no narrations in detail for journey, process, element and circuit.
In addition, it should be understood by one skilled in the art that provided herein attached drawing be provided to explanation purpose, and
What attached drawing was not necessarily drawn to scale.
Unless the context clearly requires otherwise, "include", "comprise" otherwise throughout the specification and claims etc. are similar
Word should be construed as the meaning for including rather than exclusive or exhaustive meaning；That is, be " including but not limited to " contains
Justice.
In the description of the present invention, it is to be understood that, term " first ", " second " etc. are used for description purposes only, without
It can be interpreted as indication or suggestion relative importance.In addition, in the description of the present invention, unless otherwise indicated, the meaning of " multiple "
It is two or more.
Unless otherwise clearly defined and limited, the terms such as term " installation ", " connected ", " connection ", " fixation " should be done extensively
Reason and good sense solution may be a detachable connection for example, it may be being fixedly connected, or integral；It can be mechanical connection, it can also be with
It is electrical connection；Can be directly connected, can also indirectly connected through an intermediary, can be connection inside two elements or
The interaction relationship of two elements, unless otherwise restricted clearly.For the ordinary skill in the art, Ke Yigen
The concrete meaning of above-mentioned term in the present invention is understood according to concrete condition.
In order to realize the miniaturization of structure and reduce the influence of electromagnetic interference, according to marmem (Shape
Memory Alloy, SMA) material characteristic realize lens bracket driving so that realize camera module auto-focusing or light
Learn stabilization.There are two types of phase (lattice states) for SMA material tool: martensitic phase and austenite phase.When SMA material itself or ambient temperature are sent out
When changing, the lattice state inside SMA material is converted between martensitic phase and austenite phase, SMA material (for example SMA
Wire rod) length stretch, voice coil motor can be substituted, optical lens group is pushed to realize auto-focusing or optical anti-vibration.
However, in the optical lens group of the auto-focusing made of SMA material or optical anti-vibration, the essence of usual Bit andits control
Degree can only achieve 0.2% magnitude.For example, largest deformation amount is 0.5mm, corresponding Bit andits control precision is 1um.SMA material
It is unable to satisfy the Bit andits control demand of the high-resolution camera system of 20M or more pixel.Therefore, the embodiment of the invention provides one
Kind lens driving apparatus, not only may be implemented the coarse adjustment to the focal length of optical lens group, but also the essence to optical lens group may be implemented
It adjusts.
Fig. 1-Fig. 3 is the structural schematic diagram of the lens driving apparatus of the embodiment of the present invention.As shown in Figure 1-Figure 3, camera lens drives
Dynamic device A includes first support 1, second support 2, third bracket 3, the first drive module 4 and the second drive module 5.Wherein,
The both ends of one drive module 4 are connect with first support 1 and second support 2 respectively.It is formed between first support 1 and second support 2
There is scheduled gap, when the first drive module 4 is controlled flexible, first support 1 and second support 2 are in the first drive module 4
It is made a relative move under drive.When the first drive module 4 is controlled flexible, drive first support 1 and second support 2 along optical axis side
To relative movement, to change the spacing between first support 1 and second support 2.In the present embodiment, the top of first support 1
It is provided with loophole 11, when being fixed with optical lens group C in first support 1, light beam enters optics by the loophole 11
In lens group C.When first support 1 and second support 2 relatively move, the focal length of adjustable optical lens.
Second drive module 5 includes elastic component 51 and driving line 52.Wherein, elastic component 51 is set to second support 2 and
Between three brackets 3, so that forming gap between second support 2 and third bracket 3 and there is the trend being located remotely from each other.Drive line
52 connection second supports 2 and third bracket 3 apply the power for making the two close to each other.It is controlled flexible by driving line 52
The spacing of the third bracket 3 and the second support 2 can be controlled.When driving line 52 to be in relaxed state, second
Spacing between frame 2 and third bracket 3 passes through the spring return of elastic component 51 to initial range.
In the present embodiment, the upper and lower ends of the first drive module 4 fix with first support 1 and second support 2 connect respectively
It connects.Its fixed form can be connected or be welded etc. to paste.In an optional implementation, first drive module 4 can
Think piezoelectric ceramic piece or stacks type piezoelectric ceramics.According to the inverse piezoelectric effect of piezoelectric ceramics, apply when to the first drive module 4
When electric field, the dielectric in the first drive module 4 just generates mechanically deform on short transverse (direction of an electric field), changes first and drives
The size of dynamic model block 4 in the height direction, and then between changing between the first support 1 being firmly connected with it and second support 2
Away from.The maximum displacement of the piezoelectric ceramics is generally the 0.1% of its size.For example, the maximum displacement of the piezoelectric ceramics of 4mm high
Amount is 4um, repetitive positioning accuracy 0.01um.It as a result, can be to first support 1 and the by the inverse piezoelectric effect of piezoelectric ceramics
Two brackets 2 carry out having high-precision fine tuning, to adapt to the demand of high-pixel camera system.
When the first drive module 4 is to stack type piezoelectric ceramics, the type piezoelectric ceramics that stacks is by n piece piezoelectric ceramic piece group
At to connect on mechanical connection manner, electric connection mode is parallel connection, can be effectively reduced and is applied to the first drive module 4
On driving voltage so that the lens driving apparatus A of the present embodiment can be adapted for through battery-driven portable electric
Sub- equipment.The upper and lower ends for stacking type piezoelectric ceramics have insulating properties, and two sides are coated with conductive layer, are respectively equipped with second electrode
9, for being connected with external drive circuit.Preferably, the thickness for stacking type piezoelectric ceramics is less than 0.05mm, and the number of plies is greater than
20。
When the first drive module 4 is formed by a piezoelectric ceramic piece, the piezoelectric ceramic piece thickness is less than 0.3mm, can
To be adapted to low voltage drive.
Lens driving apparatus A further includes guide rod 6, and one end of the guide rod 6 is fixedly connected with third bracket 3.Second
Bracket 2 is provided with guide hole 21, and the diameter of the guide hole 21 is greater than the diameter of guide rod 6.The other end of the guide rod 6 is worn
The guide hole 21 is crossed, guidance first support 1 and 2 entirety of second support are relatively moved with third bracket 3 along optical axis direction.
The first support 1 is provided with hole 12 in the opposite position with guide hole 21, and the other end of the guide rod 6 is set
It is placed in the hole 12.Wherein, the diameter in the hole 12 is greater than or equal to the diameter of guide rod 6, so that first support 1 can be with
It is moved along guide rod 6.It can also be along the direction that guide rod 6 limits when this relatively moves first support 1 and second support 2
(namely optical axis direction) is mobile.The hole 12 can be through-hole or blind hole.
In an optional implementation, there are two guide rods 6 for the lens driving apparatus A tool, respectively with diagonal shape
Formula is set on third bracket 3.When second support 2 and third bracket 3 relatively move, it is possible to reduce first support 1 and second
Bracket 2 generates shake.
In another optional implementation, there are four guide rods 6 for the lens driving apparatus A tool, are distributed in the third
On four angles of bracket 3.Accordingly, it is respectively set that there are four guide hole 21 and four in the second support 2 and first support 1
Hole 12.It after each guide rod 6 passes through corresponding guide hole 21, is relatively moved along corresponding hole 12, so that first support 1 and the
Two brackets 2 more stable can be moved along optical axis direction relative to third bracket 3, generate wow and flutter when further avoiding mobile.
In the present embodiment, elastic component 51 can be made of the flexible material such as spring, rubber.Preferably, described
Elastic component 51 is spring, is sheathed on guide rod 6, so that when second support 2 and third bracket 3 relatively move, elastic component
51 direction when being stretched is parallel with optical axis direction.Optionally, when elastic component 51 is spring, the quantity of the elastic component 51
It is identical as the quantity of guide rod 6.
The both ends of driving line 52 are connect with third bracket 3, and middle part is connect with second support 2, so that the two of driving line 52
End forms isosceles triangle with middle part.When driving line 52 controlled flexible, it can control second support 2 and moved along optical axis direction.
Preferably, prestressing force adjusting screw 7 can also be arranged in lens driving apparatus A, detachably connected with the second support 2.
The middle part of the driving line 52 carries out hook connection around prestressing force adjusting screw 7.The end of the prestressing force adjusting screw 7
(i.e. exposed portion) is round variable section structure.When the depth difference in 7 precession second support 2 of prestressing force adjusting screw,
The diameter of exposed portion is different, and the length around the driving line 52 of the prestressing force adjusting screw 7 is different, it is possible thereby to installing
When achieve the purpose that adjust driving 52 length of line, as shown in Figure 4 and Figure 5.In the present embodiment, the driving line 52 be can be by
Control carries out flexible material and is formed.Preferably, the driving line 52 is shape memory alloy wire.The shape memory alloy wire
Displacement range about 400um, positioning accuracy about 1um.In the present embodiment, the diameter of the shape memory alloy wire is less than 50um.
Lens driving apparatus A further includes two first electrodes 8, is fixedly connected respectively with third bracket 3.The driving line 52
Both ends be electrically connected respectively with two first electrodes 8, connect, driven with external drive circuit by two first electrodes 8
Signal, and then controlled stretched.Two first electrodes 8 are distributed in the two sides of third bracket 3 so that driving line 52 both ends with
After first electrode 8 connects, isosceles triangular structure is formed.When driving line 52 to receive the driving signal of the output of first electrode 8,
The collapsing length that prestressing force adjusts the driving line 52 of 7 two sides of screw is equal, so that second support 2 and third bracket 3 are along optical axis
Direction relative movement.
Wire lead slot 22 is additionally provided in second support 2, the wire lead slot 22 is set to prestressing force and adjusts near screw 7,
It can be formed as channel form, for guiding the trend of driving line 52.When line 52 being driven to adjust screw 7 around prestressing force, two sides
Driving line 52 be located in the wire lead slot 22.When driving line 52 controlled, driving line 52 stretches along wire lead slot 22.
In an optional implementation, the third bracket 3 includes the first component 31 and second component 32, above and below the two
Stacked connection, which is surrounded, forms accommodating space, and first electrode 8 is set in accommodating space.Preferably, first electrode 8 is with elasticity
Metal clips, one end is fixedly connected with the first component 31, and the other end is engaged by prestressing force with second component 32.Work as drive
Moving-wire 52 is controlled when being telescoped up to the limit, and first electrode 8 starts to deform, and relative displacement occurs with second component 32.Due to first
The deformation of electrode 8 provides additional structure buffering, when driving line 52 being avoided to be more than safe operating limit, hair for driving line 52
Raw fracture.
In another optional implementation, the set-up mode and above-mentioned set-up mode for driving line 52 are on the contrary, drive line 52
Both ends can be connect with second support 2, middle part is connect with third bracket 3, as shown in Figure 6.Prestressing force adjusts screw 7 can be with
Third bracket 3 is detachably connected.Two first electrodes 8 are distributed in the two sides of second support 2.Drive line 52 both ends respectively with
First electrode 8 is electrically connected, and middle part adjusts screw 7 around prestressing force.When driving line 52 controlled flexible, second support 2 and third
Bracket 3 is relatively moved along optical axis direction.Optionally, it is also provided with wire lead slot on third bracket 3, is set to the prestressing force
The corresponding position of screw 7 is adjusted, for guiding the trend of driving line 52.Optionally, the second support 2 may be set to be
Structure identical with above-mentioned third bracket 3, the second support 2 include third member and the 4th component, and the two surrounds to form appearance
Between emptying, for accommodating first electrode 8.Two first electrodes 8 are corresponding to be arranged in the second support 2, as shown in Figure 6.
In the present embodiment, by the way that piezoelectric ceramics is arranged between first support 1 and second support 2, in 2 He of second support
Shape memory alloy wire is set between third bracket 3, so that on the one hand lens driving apparatus can use shape memory alloy wire
The precision adjustment for realizing larger displacement range, on the other hand can use the fine tuning that piezoelectric ceramics realizes small distance, reach high
The effect of precision positioning.
The second support 2 and third bracket 3 are respectively provided with guide channel 23,33 in upper and lower corresponding position.Two second
Electrode 9 draws along corresponding guide channel 23,33 connect with external drive circuit respectively, can be installed on it to avoid second electrode 9
When in its equipment, scratched by other equipment, while can also be improved installation accuracy.
In an optional implementation, lens driving apparatus A can have two the first drive modules 4 and two drivings
Line 52.Two the first drive modules 4 are distributed in the opposite two sides of first support 1 and second support 2, each first drive module
4 are all correspondingly arranged there are two second electrode 9, connect with corresponding driving circuit and obtain driving signal, so that 1 He of first support
The distance between second support 2 can be finely adjusted along optical axis direction.Two driving lines 52 are distributed in second support 2 and third branch
The opposite two sides of frame 3, each driving line 52 are correspondingly arranged there are two first electrode 8, obtain with the connection of corresponding driving circuit
Driving signal is taken, so that the distance between second support 2 and third bracket 3 can carry out coarse adjustment along optical axis direction.In this reality
It applies in example, is worked together by the first drive module of control 4 simultaneously and driving line 52, and then change the focal length of optical lens group,
Realize optical zoom or stabilization.
In another optional implementation, lens driving apparatus A can have four the first drive modules 4 and two drivings
Line 52.Four the first drive modules 4 are distributed in four sides of first support 1 and second support 2, each first drive module 4
There is independent driving circuit to be controlled.Four driving lines 52 are distributed in opposite four of second support 2 and third bracket 3
Side, each driving line 52 have independent driving circuit to control.
In another embodiment, the embodiment of the invention also provides a kind of camera modules, including mirror head outer shell B, optics
Lens group C, photosensitive element D and lens driving apparatus A, as shown in Figure 7.Wherein, in lens driving apparatus A and above-described embodiment
Lens driving apparatus A is identical, is set in mirror head outer shell B.Optical lens group C is set to the first of the lens driving apparatus A
In bracket 1, as shown in Figure 7.Photosensitive element D is set in the mirror head outer shell B, is oppositely arranged with the optical lens group C.Institute
The centre for stating third bracket 3 is set as through-hole, so that photosensitive element D can capture the image letter transmitted by optical lens group
Number, coarse adjustment and/or accurate adjustment are carried out to control lens driving apparatus A to the focal length of the optical lens group C.The photosensitive element D
It can be charge-coupled device or CMOS chips.
The lens driving apparatus A and camera module of the embodiment of the present invention can be applied to electronics arbitrarily with camera function
In equipment.For example, mobile phone, tablet computer, laptop, unmanned plane, automobile camera shooting system etc..
The embodiment of the invention discloses a kind of lens driving apparatus and camera module, the first drive module connects first support
Gap is formed with second support and therebetween, and driving line connection third bracket and second support, elastic component are set to third
Between bracket and second support.Described the is controlled by applying driving signal to the first drive module and/or the second drive module
One drive module and/or driving line are controlled flexible to drive the first support and second support to relatively move along optical axis direction
And/or the spacing of control the third bracket and the second support.Thus the coarse adjustment being displaced between bracket not only may be implemented but also
The accurate adjustment that displacement may be implemented improves the Adjustment precision being displaced between bracket, and then improves the focusing essence of optical lens
Degree.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For, the invention can have various changes and changes.All any modifications made within the spirit and principles of the present invention are equal
Replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (14)
1. a kind of lens driving apparatus, comprising:
First support, for fixing optical lens group；
Second support and third bracket；
At least one first drive module connects the first support and second support and forms gap therebetween, described
First drive module is configured as controlled flexible to drive the first support and second support to relatively move along optical axis direction；With
And
At least one second drive module is configured as controlled flexible to drive the second support and third bracket along the light
Axis direction relative movement；
Wherein, second drive module includes the elastic component that is set between third bracket and second support and connects described the
The driving line of three brackets and the second support, the driving line are controlled flexible to control the third bracket and second described
The spacing of frame；
Displacement accuracy and the institute of first drive module controlled flexible the driving first support and second support relative movement
It is different to state the displacement accuracy that the controlled flexible driving second support of driving line and third bracket relatively move.
2. lens driving apparatus according to claim 1, which is characterized in that the lens driving apparatus further include:
At least two guide rods, one end are fixedly connected with the third bracket；
Wherein, the second support is provided at least two guide holes, and the guide rod passes through the corresponding guide hole, guidance
The second support and the third bracket are relatively moved along optical axis direction.
3. lens driving apparatus according to claim 2, which is characterized in that the first support with the guide hole
Relative position is provided with hole, and the hole of the first support is sheathed on the guide rod in a manner of it can be movable relatively.
4. lens driving apparatus according to claim 2, which is characterized in that the elastic component is spring, is sheathed on described
On guide rod.
5. lens driving apparatus according to claim 1, which is characterized in that the driving line both ends are fixed on the third
On bracket, middle section is fixed in the second support；Alternatively,
The driving line both ends are fixed in the second support, and middle section is fixed on the third bracket.
6. lens driving apparatus according to claim 1, which is characterized in that the lens driving apparatus further include:
Prestressing force adjusting screw, detachably connected with the second support, the driving line adjusts spiral shell around the prestressing force
Nail is connect with the second support.
7. lens driving apparatus according to claim 6, which is characterized in that the end of the prestressing force adjusting screw is circle
Deformation cross section structure.
8. lens driving apparatus according to claim 6, which is characterized in that the second support is provided with wire lead slot, guidance
The driving line.
9. lens driving apparatus according to claim 5, which is characterized in that the lens driving apparatus further include:
At least two first electrodes are fixedly connected with the second support or third bracket, it is described driving line both ends respectively with
Corresponding first electrode electrical connection, stretches for receiving driving signal.
10. lens driving apparatus according to claim 9, which is characterized in that the first electrode has elasticity；
The third bracket includes the first component and second component, and the two surrounds to form accommodating space, for accommodating described first
Electrode.
11. lens driving apparatus according to claim 9, which is characterized in that the first electrode has elasticity；
The second support includes third member and the 4th component, and the two surrounds to form accommodating space, for accommodating described first
Electrode.
12. lens driving apparatus described in any one of -11 according to claim 1, which is characterized in that first drive module
For piezoelectric ceramic piece or type piezoelectric ceramics is stacked, the driving line is shape memory alloy wire.
13. lens driving apparatus according to claim 12, which is characterized in that the second support and third bracket have
Guide channel；
The lens driving apparatus further include:
At least two second electrodes are electrically connected to first drive module across the guide channel.
14. a kind of camera module, comprising:
Mirror head outer shell；
Such as lens driving apparatus of any of claims 1-13, it is set in the mirror head outer shell；
Optical lens group is set in the lens driving apparatus；
Photosensitive element is oppositely arranged with the optical lens group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811070509.8A CN109061829A (en) | 2018-09-13 | 2018-09-13 | Lens driving apparatus and camera module |
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| CN110750023A (en) * | 2019-09-11 | 2020-02-04 | 瑞声科技(新加坡)有限公司 | Lens module and electronic equipment |
| CN110913099A (en) * | 2019-10-28 | 2020-03-24 | 华为技术有限公司 | Camera module and terminal |
| CN111158105A (en) * | 2020-02-10 | 2020-05-15 | 睿恩光电有限责任公司 | SMA wire lens drive device for auto-focusing, camera device, and electronic apparatus |
| WO2020243859A1 (en) * | 2019-06-01 | 2020-12-10 | 瑞声光学解决方案私人有限公司 | Automatic focusing lens assembly and automatic focusing method thereof |
| WO2020243870A1 (en) * | 2019-06-01 | 2020-12-10 | 瑞声光学解决方案私人有限公司 | Prism device applied to periscope-type lens module, and periscope-type lens module |
| WO2021000161A1 (en) * | 2019-06-30 | 2021-01-07 | 瑞声光学解决方案私人有限公司 | Lens module |
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| CN112672019A (en) * | 2020-12-24 | 2021-04-16 | 维沃移动通信有限公司 | Electronic equipment and camera module thereof |
| WO2021104402A1 (en) * | 2019-11-29 | 2021-06-03 | 华为技术有限公司 | Camera module and electronic device |
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| CN113325544A (en) * | 2021-06-07 | 2021-08-31 | 上海比路电子股份有限公司 | Continuous zooming optical lens driving device |
| CN114114602A (en) * | 2021-12-07 | 2022-03-01 | 新思考电机有限公司 | Lens driving device and image pickup device |
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| WO2020243859A1 (en) * | 2019-06-01 | 2020-12-10 | 瑞声光学解决方案私人有限公司 | Automatic focusing lens assembly and automatic focusing method thereof |
| WO2020243870A1 (en) * | 2019-06-01 | 2020-12-10 | 瑞声光学解决方案私人有限公司 | Prism device applied to periscope-type lens module, and periscope-type lens module |
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| CN110913099A (en) * | 2019-10-28 | 2020-03-24 | 华为技术有限公司 | Camera module and terminal |
| CN113873110B (en) * | 2019-10-28 | 2023-01-03 | 华为技术有限公司 | Camera module and terminal |
| WO2021104402A1 (en) * | 2019-11-29 | 2021-06-03 | 华为技术有限公司 | Camera module and electronic device |
| CN111158105A (en) * | 2020-02-10 | 2020-05-15 | 睿恩光电有限责任公司 | SMA wire lens drive device for auto-focusing, camera device, and electronic apparatus |
| CN114666461A (en) * | 2020-12-22 | 2022-06-24 | 宁波舜宇光电信息有限公司 | Retractable camera module and electronic equipment |
| CN114666461B (en) * | 2020-12-22 | 2023-08-29 | 宁波舜宇光电信息有限公司 | Telescopic camera module and electronic equipment |
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| CN113114907A (en) * | 2021-04-21 | 2021-07-13 | 维沃移动通信有限公司 | Camera module and electronic equipment |
| CN113325544A (en) * | 2021-06-07 | 2021-08-31 | 上海比路电子股份有限公司 | Continuous zooming optical lens driving device |
| CN113325544B (en) * | 2021-06-07 | 2022-06-03 | 上海比路电子股份有限公司 | Continuous zooming optical lens driving device |
| WO2023005039A1 (en) * | 2021-07-29 | 2023-02-02 | 上海信迈电子科技有限公司 | Lens driving apparatus, camera device, and mobile terminal |
| CN114114602A (en) * | 2021-12-07 | 2022-03-01 | 新思考电机有限公司 | Lens driving device and image pickup device |
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