CN104267480B - Control method and camera module for camera module - Google Patents

Control method and camera module for camera module Download PDF

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Publication number
CN104267480B
CN104267480B CN201410490636.9A CN201410490636A CN104267480B CN 104267480 B CN104267480 B CN 104267480B CN 201410490636 A CN201410490636 A CN 201410490636A CN 104267480 B CN104267480 B CN 104267480B
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Prior art keywords
module
camera lens
coil
lens module
camera
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CN104267480A (en
Inventor
赵立新
侯欣楠
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Galaxycore Shanghai Ltd Corp
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Galaxycore Shanghai Ltd Corp
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    • 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
    • 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
    • H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
    • 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
    • H04N23/65—Control of camera operation in relation to power supply

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)
  • Studio Devices (AREA)

Abstract

The present invention provides a kind of control method of camera module.Wherein, camera module includes image-forming module, sleeve module, the camera lens module, at least one coil, at least one magnetic part that may correspond to sleeve module and moved relative to optical axis direction being placed in sleeve module.The control method includes directly or indirectly for camera lens module being pressed against sleeve module；There is radial pressure between camera lens module and sleeve module, produce between camera lens module and sleeve module the frictional force along optical axis direction by pressure, frictional force enables to camera lens module relative to sleeve module remains stationary state in the direction of the optical axis；Directly it is at least one coil with electric current by wire, at least one coil or at least one magnetic part selectively match with camera lens module, camera lens module is by the electromagnetic force along the optical axis direction, electromagnetic force does the driving force to move along a straight line as camera lens module along the optical axis direction, to drive camera lens module to move.

Description

Control method and camera module for camera module
Technical field
The present invention relates to the control method and camera module for camera module, wherein, camera module can be controlled The direction of motion and move distance of the lens barrel are made, realizes the flexible and/or focus function of the lens barrel.
Background technology
Camera module is made up of sensitive chip and imaging lens group, and imaging lens group is placed in the lens barrel of module, lens barrel Organic cooperation of position and sensitive chip could obtain the image or video of high-quality.Modern handheld device, on the one hand in order to Attractive in appearance needs to be designed to be more and more thinner, and the height of camera module is also more and more lower therewith, corresponding lens set total height drop Low, on the other hand for the needs of image quality, the photosurface Diagonal Dimension of sensitive chip is increasing, how to ensure eyeglass The angle of visual field of group is constant, increases sensitive chip size, and meets the handheld device appearance design requirement always hand of thinner fuselage The problem of holding equipment design industry research.The especially ultra-thin digital camera of digital camera solves this using flexible lens set Problem, such as screw thread/nut structure, gear structure or the isostructural mechanical transmission structure of turbine worm, but such structure It is relatively bulky, it can not be placed on as in mobile phone, notebook computer, Pad etc. thinner equipment.It is and universal in existing light and thin type equipment The voice coil motor used, its lens barrel can not be stretched out outside camera module, can only be used as automatic focusing, can not realize eyeglass during work The flexible function of group, thus can not solve the problems, such as above-mentioned camera module height more and more lower and bring.In addition, existing take the photograph As head mould group, lens barrel is set to be maintained at certain position, it is necessary to persistently to coil with electric current to balance the elastic force of elastomer, module Power consumption it is bigger, moreover, lens barrel is when for linear motion along optical axis direction, because optical axis direction lacks guide frame, easily Shake, cause light path eccentric, influence picture quality.
It can be seen that light and thin type electronic equipment needs a kind of new minisize pick-up head module to solve above-mentioned existing module thickness Contradiction between picture quality, and in the presence of solving the problems, such as existing module, this new camera module can Lens barrel is stretched out outside module, ensure under conditions of the angle of visual field is constant, increase the size of sensitive chip, improve picture quality, together Shi Yaoqiu is simple in construction, can be applied in the light and thin type electronic equipments such as mobile phone, pad.
The content of the invention
In view of the understanding to the technical problem in background technology, if it is possible to propose a kind of to be suitable to lightening consumer electricity The new camera module of sub- product and the corresponding control method for such camera module, that will be had very much Benefit.
The first aspect of the present invention proposes a kind of control method of camera module, wherein, the camera module bag Include image-forming module, sleeve module, be placed in can be transported corresponding to sleeve module relative to optical axis direction in the sleeve module Dynamic camera lens module, at least one coil, at least one magnetic part, the control method comprise the following steps：
A. the camera lens module is directly or indirectly pressed against sleeve module, wherein, the camera lens module and sleeve die There is radial pressure between block, produced by the pressure between the camera lens module and the sleeve module along optical axis direction Frictional force, the frictional force enables to the relatively described sleeve module of camera lens module remains stationary shape in the direction of the optical axis State；And
B. directly it is at least one coil with electric current by wire, at least one coil or described at least one Individual magnetic part selectively matches with the camera lens module, the camera lens module by the electromagnetic force along the optical axis direction, The electromagnetic force does the driving force to move along a straight line as the camera lens module along the optical axis direction, to drive the camera lens module Motion.
According to one embodiment of the present of invention, the camera module also includes：It is fixedly connected on the camera lens mould Elastomeric element on block, the camera lens module are pressed against in the sleeve module indirectly via elastomeric element.
According in one embodiment of the present of invention, in the step b, the electric current that is passed through at least one coil It is pulsed so that the camera lens module realizes that noncontinuity is moved；
The ratio between absolute value of maxima and minima of the pulse current is at least 1.2；
The single pulsewidth of the pulse current is less than 2s.
According to one embodiment of the present of invention, in the step b, initial electricity is passed through at least one coil Stream, makes at least one coil and at least one magnetic part geo-stationary, the voltage at least one coil Divided by the value of electric current remains the first relation, i.e.,：U/I=R.
According to one embodiment of the present of invention, the size of the initial current is progressively increased, is made described at least one Relative motion occurs for coil and at least one magnetic part, causes voltage at least one coil divided by electric current It is worth for the second relation, i.e. U/I ＞ R；Detect first relation hair of the value of voltage divided by electric current at least one coil Raw change can interpolate that at least one coil and at least one magnetic part, and there occurs relative motion.
According to one embodiment of the present of invention, in the step b, the motion of the camera lens module is relative to set Cylinder mould block moves forward or backwards relatively along optical axis direction, and the motion forward or backwards relatively each time has the first fortune Dynamic distance, first move distance is by the radial pressure between the camera lens module and sleeve module, at least one line The coefficient of friction between pulse current size, climbing speed, waveform widths, the camera lens module and sleeve module in circle is determined It is fixed；First move distance can be changed by changing wherein one or more parameters, to control the motion of the camera lens module.
According to one embodiment of the present of invention, in the step b, the motion of the camera lens module is relative to set Cylinder mould block moves forward or backwards relatively along optical axis direction, and the motion forward or backwards relatively each time has the first fortune Dynamic distance, first move distance are pressed against the radial pressure of sleeve module, at least one line by the elastomeric element The coefficient of friction between pulse current size, climbing speed, waveform widths, the sleeve module and the elastomeric element in circle Determine；First move distance can be changed by changing wherein one or more parameters, to control the camera lens module and elasticity The motion of part.
According to one embodiment of the present of invention, the camera lens module also includes motion and carries seat, lens barrel, friction means；
The lens barrel is placed in the motion and carried in seat, and the motion carries seat and the lens barrel and merged into a single whole shaping or solely Vertical molding assembly；The motion, which carries seat tool, to be had in some extensions radially；At least one coil is placed in described prolong In extending portion, and suitable for being moved together with the camera lens module；The friction means are placed in the extension and the elastomeric element Between.
According to one embodiment of the present of invention, the camera lens module also includes motion and carries seat, lens barrel；
The lens barrel is placed in the motion and carried in seat, and the motion carries seat and the lens barrel and merged into a single whole shaping or solely Vertical molding assembly；The motion, which carries seat tool, to be had in some extensions radially；At least one coil is placed in described prolong In extending portion, and suitable for being moved together with the camera lens module；Described elastomeric element is connected to the extension or the coil Outside so that the elastomeric element moves together with described camera lens module.
According to one embodiment of the present of invention, the sleeve module includes magnet yoke ring and is placed in inside the magnet yoke ring Cartridge unit, the cartridge unit stretches out more than the outer face 0.2mm of the magnet yoke ring, plays and be oriented to for the camera lens module With the effect of protection camera lens module.
According to one embodiment of the present of invention, yoke block is equipped with the magnet yoke ring；The yoke block and the magnetic There is the air gap between yoke ring internal face, at least one coil is placed in the air gap and can be along optical axis direction Motion, the optical axis direction length of the air gap account for 1/3rd of the optical axis direction gross thickness of the camera module with On.
According to one embodiment of the present of invention, the magnet yoke ring, the cartridge unit and the institute of the sleeve module Yoke block is stated to be formed in one or be separately provided.
According in one embodiment of the present of invention, at least one coil by wire directly and power supply control apparatus It is electrically connected with.
According to one embodiment of the present of invention, at least one coil includes two kinds of fixed structures, solid first Determine in structure, at least one coil is directly mutually fixedly connected with the extension；In the second fixed structure, it is described at least There is relative motion distance in the direction of the optical axis, the relative motion distance is at 10 microns between one coil and the extension Between 1 millimeter.
According to one embodiment of the present of invention, in the first fixed structure, there are two kinds of drivings in the electric current Mode,
First type of drive：At least one coil is passed through the electric current consistent with relative direction, pushes directly on The camera lens module movement；
Second type of drive：At least one coil is passed through the electric current consistent with relative inverse direction, makes the mirror Head module stores certain elastic potential energy and is then passed through the electric current consistent with relative direction again, promotes the camera lens Module moves, and static under frictional force effect.
According to one embodiment of the present of invention, in second fixed structure, the current driver mode is：For At least one coil is passed through the electric current consistent with relative inverse direction, at least one coil is stored certain bullet Property potential energy and be then passed through again and do positive work, at least one coil with respect to the consistent electric current of direction, electromagnetic force Accumulate kinetic energy and collided with the camera lens module, to promote the camera lens module to move, and it is static under frictional force effect.
According to one embodiment of the present of invention, the camera lens module can have two kinds of configuration states in step a,
The first state：Shape with the focusing that direct imaging is carried out to infinite far object when the camera lens module is initial State；
Second of state：The camera lens module does not have focusing that direct imaging is carried out to infinite far object when initial State, the camera lens module need to by the coil with electric current, the telescopic process that camera lens module is stretched out in sleeve module, It is adjusted into the state for the focusing being imaged to infinite far object.
When according to one embodiment of the present of invention when second of state, the camera lens module is completed to stretch out sleeve Time in module end face or retraction sleeve module is less than 20s.
According to one embodiment of the present of invention, when the first state or the second state, the camera lens module is Discontinuously move, the distance of each persistent movement is not more than 100 microns, realizes the function of search focusing position.
According in one embodiment of the present of invention, the camera lens module relative to the sleeve module move when, pass through institute State image-forming module output image, detect described image definition, determined according to the change of described image definition and described in matching First state or the second state, realize the flexible and/or focus function of the camera lens module.
In addition, the second aspect of the present invention proposes a kind of camera module, the camera module include image-forming module, Sleeve module, it is placed in the sleeve module and can corresponds to the camera lens mould that is moved relative to optical axis direction of sleeve module Block, at least one coil, at least one magnetic part, it is characterised in that
The camera lens module is directly or indirectly pressed against sleeve module；Have between camera lens module and the sleeve module Radial pressure, the frictional force along optical axis direction is produced between the camera lens module and the sleeve module by the pressure, The frictional force enables to the relatively described sleeve module of camera lens module remains stationary state in the direction of the optical axis；
The camera module also includes power supply control apparatus, and it is directly provided by wire at least one coil Electric current, at least one coil or at least one magnetic part selectively match with the camera lens module, described Camera lens module is done by the electromagnetic force along the optical axis direction, the electromagnetic force as the camera lens module along the optical axis direction The driving force of linear motion, to drive the camera lens module to move.
According to one embodiment of the present of invention, the camera module also includes：It is fixedly connected on the camera lens mould Elastomeric element on block, the camera lens module are pressed against in the sleeve module indirectly via elastomeric element.
According to one embodiment of the present of invention, it is passed through in power supply control apparatus at least one coil Electric current is pulsed, the camera lens module is realized that noncontinuity is moved；
The ratio between absolute value of maxima and minima of the pulse current is at least 1.2；
The single pulsewidth of the pulse current is less than 2s.
According to one embodiment of the present of invention, the power supply control apparatus is that at least one coil is passed through initially Electric current, makes at least one coil and at least one magnetic part geo-stationary, the electricity at least one coil Pressure divided by the value of electric current remain the first relation, i.e.,：U/I=R.
According to one embodiment of the present of invention, the size of the initial current is progressively increased, is made described at least one Relative motion occurs for coil and at least one magnetic part, causes voltage at least one coil divided by electric current It is worth for the second relation, i.e. U/I ＞ R；Detect first relation hair of the value of voltage divided by electric current at least one coil Raw change can interpolate that at least one coil and at least one magnetic part, and there occurs relative motion.
According in one embodiment of the present of invention, the motion of the camera lens module is along optical axis side relative to sleeve module To move forward or backwards relatively, it is described each time motion has the first move distance forward or backwards relatively, described the One move distance is by the radial pressure between the camera lens module and sleeve module, the pulse current at least one coil Coefficient of friction between size, climbing speed, waveform widths, the camera lens module and sleeve module determines；Change one of them Or multiple parameters can change first move distance, to control the motion of the camera lens module.
According to one embodiment of the present of invention, in the step b, the motion of the camera lens module is relative to set Cylinder mould block moves forward or backwards relatively along optical axis direction, and the motion forward or backwards relatively each time has the first fortune Dynamic distance, first move distance are pressed against the radial pressure of sleeve module, at least one line by the elastomeric element The coefficient of friction between pulse current size, climbing speed, waveform widths, the sleeve module and the elastomeric element in circle Determine；First move distance can be changed by changing wherein one or more parameters, to control the camera lens module and elasticity The motion of part.
According to one embodiment of the present of invention, the camera lens module also includes motion and carries seat, lens barrel, friction means；
The lens barrel is placed in the motion and carried in seat, and the motion carries seat and the lens barrel and can merged into a single whole；It is described Motion, which carries seat tool, to be had in some extensions radially；At least one coil is placed in the extension, and suitable for The camera lens module moves together；The friction means are placed between the extension and the elastomeric element.
According to one embodiment of the present of invention, the camera lens module also includes motion and carries seat, lens barrel；
The lens barrel is placed in the motion and carried in seat, and the motion carries seat and the lens barrel and merged into a single whole shaping or solely Vertical molding assembly；The motion, which carries seat tool, to be had in some extensions radially；At least one coil is placed in described prolong In extending portion, and suitable for being moved together with the camera lens module；Described elastomeric element prolongs raw portion or the coil described in being connected to Outside so that the elastomeric element moves together with described camera lens module.
According to one embodiment of the present of invention, the sleeve module includes magnet yoke ring and is placed in inside the magnet yoke ring Cartridge unit, the cartridge unit stretches out more than the outer face 0.2mm of the magnet yoke ring, plays and be oriented to for the camera lens module With the effect of protection camera lens module.
According to one embodiment of the present of invention, yoke block is equipped with the magnet yoke ring；The yoke block and the magnetic There is the air gap between yoke ring internal face, at least one coil is placed in the air gap and can be along optical axis direction Motion, the optical axis direction length of the air gap account for 1/3rd of the optical axis direction gross thickness of the camera module with On.
According to one embodiment of the present of invention, at least one coil includes two kinds of fixed structures, solid first Determine in structure, at least one coil is directly mutually fixedly connected with the extension；In the second fixed structure, it is described at least There is relative motion distance in the direction of the optical axis, the relative motion distance is at 10 microns between one coil and the extension Between 1 millimeter.
By means of the optimal control of camera can be realized according to control method of the present invention and camera module, from And enable this new camera module lens barrel is stretched out outside module, ensure under conditions of the angle of visual field is constant, increase sense The size of optical chip, picture quality is improved, while its is simple in construction, can be applied to the light and thin type electronic equipments such as mobile phone, pad In.Furthermore extra electric current is not needed when lens barrel is static, so as to save the power consumption of camera module, this point is for portable Formula equipment is even more important.
Brief description of the drawings
Fig. 1 is the stereoscopic structural representation according to the camera module of the present invention；
Fig. 2 is the structural decomposition diagram according to the camera module of the first embodiment of the present invention；
Fig. 3 is according to side sectional view of the camera module of the first embodiment of the present invention along optical axis direction；
Fig. 4 is the structural decomposition diagram according to the camera module of second of embodiment of the present invention；
Fig. 5 is according to side sectional view of the camera module of second of embodiment of the present invention along optical axis direction；
Fig. 6 is the structural decomposition diagram according to the camera module of the third embodiment of the present invention；
Fig. 7 is according to top view of the camera module of the third embodiment of the invention along optical axis direction；
Fig. 8 is the voltage and current signal schematic representation under the voltage source driving according to the present invention；
Fig. 9 is the electric current and voltage signal schematic diagram under the driven with current sources according to the present invention；
Figure 10 is the flow chart for the method for making single step campaign according to the control camera module lens barrel of the present invention.
Embodiment
Below in conjunction with accompanying drawing 1-10, specific embodiment of the invention is described in detail.
Fig. 1 is the stereoscopic structural representation according to the camera module of the present invention.It can be seen that in center Camera lens module can stretch out outside whole module, and be at not extending out, stretch out a part and extend out to distalmost end Deng three kinds of states.
First embodiment：
Fig. 2 is according to the structural decomposition diagram of the camera module of the first embodiment of the present invention, and Fig. 3 is according to this Side sectional view of the camera module of the first embodiment of invention along optical axis direction；
It can be seen that include according to camera module of the present invention：Image-forming module 12, sleeve module 20, The camera lens module 30, extremely that sleeve module 20 is moved relative to optical axis direction can be corresponded to by being placed in the sleeve module 20 A few coil 7 (being in the present embodiment a coil), at least one magnetic part 4 are (in the present embodiment to can be combined to Eight magnetic parts of one circle), camera lens module 30 is directly or indirectly pressed against sleeve module 20；Camera lens module 30 and sleeve die There is radial pressure between block 20, the friction along optical axis direction is produced between camera lens module 30 and sleeve module 20 by pressure Power, frictional force enable to the relative sleeve module 20 of camera lens module 30 remains stationary state in the direction of the optical axis；
Camera module also includes power supply control apparatus, and it is directly at least one coil with electric current by wire, extremely A few coil or at least one magnetic part selectively match with camera lens module, and camera lens module is by along optical axis direction Electromagnetic force, electromagnetic force do the driving force to move along a straight line as camera lens module along optical axis direction, to drive camera lens module to move.
It can also be seen that from the figure：The camera module also includes being arranged between camera lens module 30 and sleeve module 20 Elastomeric element 9, those skilled in the art, also can be by camera lens mould it is to be appreciated that elastomeric element in this 9 is not essential Block 30 is directly pressed against sleeve module 20.Alternatively, camera lens module 30 can also be pressed against sleeve module 20 indirectly, its In, in order to not need electric current under static state to maintain the inactive state so as to reduce the power consumption of whole camera module Power, according to camera module of the present invention, elastomeric element 9 is pressed against on camera lens module 30, and elastomeric element 9 is vertical In the shape of optical axis direction be changed into camera lens module 30 apply radial direction normal pressure, elastomeric element 9 by the normal pressure elastomeric element 9 with The frictional force along optical axis direction is produced on the contact surface of camera lens module 30, the frictional force can make the relative resilient part of camera lens module 30 9 remains stationary states in the direction of the optical axis；Coil 7 keeps geo-stationary to be fixedly arranged on camera lens module 30 with camera lens module 30, It is selectable, the camera lens module 30 it is direct or indirect be pressed against sleeve module 20；The camera lens module 30 and sleeve module There is radial pressure between 20, produced by the pressure between the camera lens module 30 and the sleeve module 20 along optical axis The frictional force in direction, the frictional force can make the relatively described sleeve module 20 of the camera lens module 30 keep quiet in the direction of the optical axis Only state.And
In the present embodiment, supply unit provides electric current for the camera module, is filled via the power supply control of image-forming module Put (as shown in Figure 8) and be controlled and match for the offer electric current of coil 7, coil 7 with camera lens module 30, camera lens module 30 is by edge The electromagnetic force of optical axis direction, electromagnetic force does the driving force to move along a straight line as camera lens module 30 along optical axis direction, with described in drive Camera lens module 30 moves.
Referring also to Fig. 2, Fig. 3, Fig. 8, Fig. 9, Figure 10, Fig. 8 are the voltage and electricity under the voltage source driving according to the present invention Flow signal schematic representation；Fig. 9 is the electric current and voltage signal schematic diagram under the driven with current sources according to the present invention；Figure 10 is according to this The control camera module lens barrel of invention makees the flow chart of the method for single step campaign.Specifically, driver element (not marking) passes through The control of power supply control apparatus (not marking) is that the electric current being passed through in coil 7 is pulsed, realizes the camera lens module 30 Noncontinuity is moved, and the ratio between absolute value of maxima and minima of pulse current is at least 1.2, in the present embodiment using 2 Times, and the single pulsewidth of pulse current is less than 2s, is in the present embodiment 1s.At the first moment, driver element passes through confession The control of controller for electric consumption is passed through initial current to coil 7, makes coil 7 and the geo-stationary of magnetic part 4, by detecting feedback The value of voltage divided by electric current in the detection coil 7 of first (not marking) remains the first relation, i.e.,：U/I=R.Then, will progressively The size of initial current is increased, makes coil 7 and magnetic part 4 that relative motion occur, causes voltage in coil 7 divided by electric current It is worth for the second relation, i.e. U/I ＞ R；Detect the first relation generation of the value of voltage divided by electric current in feedback unit detection coil 7 Change can interpolate that coil 7 and magnetic part 4 there occurs relative motion, and obtain making coil 7 and magnetic part 4 occur relatively The critical electric current value of motion.Wherein, the motion of camera lens module 30 be relative to elastomeric element along the relatively positive of optical axis direction or Counter motion, it is described each time relatively forward or backwards motion there is the first move distance, first move distance is by institute State the radial direction normal pressure of elastomeric element 9, the pulse current size in the coil 7, climbing speed, waveform widths, camera lens module Coefficient of friction between 30 and elastomeric element 9 determines；Specially：
The range formula of single step campaign
Wherein, n is coil turn, and B is magnetic induction intensity, and L is the effective length of a circle coil, and m is the matter of moving component Amount, f are frictional force sizes, IwIt is driving current, θ is the angle of the lens barrel direction of motion and gravity, and Δ t is square wave pulse width.
First move distance can be changed by changing wherein one or more parameters, to control the camera lens module 30 Motion.
As shown in Figure 2 and Figure 3, the camera lens module 30 also includes motion load seat 6, lens barrel (is carried in seat positioned at motion and do not marked It is bright), friction means 8；
Lens barrel is placed in motion and carried in seat 6, and motion carries seat and lens barrel and can merge into a single whole to be molded and also individually be molded respectively； Motion, which carries seat 6, to be had in some extensions 61 radially；Coil 7 is placed in the extension 61, and is suitable to and camera lens mould Block 30 moves together；Friction means 8 are placed between extension 61 and the elastomeric element 9.In addition, sleeve module 20 also includes magnetic Yoke ring 2 and the cartridge unit 1 being placed in inside the magnet yoke ring 2, cartridge unit 20 stretch out the outer face 0.2mm of the magnet yoke ring 2 More than, play a part of being oriented to and 30 pieces of protective glass head mould for camera lens module 30.Furthermore yoke block 3 can be equipped with magnet yoke ring 2, Yoke block 3 is magnetic conductive material, is served as the effect of the magnetic conduction of magnetic part 4；Had time between yoke block 3 and the internal face of magnet yoke ring 2 Gas gap, coil 7 are placed in the air gap and can moved along optical axis direction, and the optical axis direction length of the air gap accounts for shooting More than/3rd of the optical axis direction gross thickness of head mould group.Wherein, the magnet yoke ring 2 of sleeve module 20, cartridge unit 1 and yoke What block 3 was formed in one or was separately provided.
Coil 7 is connected with the first conducting position (not marking) on camera lens module 30, conducting position and the phase of elastomeric element 9 Contact, elastomeric element 9, which is contacted with feeder ear, to be suitable to pass through means of power, and elastomeric element 9 can be conductive or has the Two conducting positions, so that feeder ear can be that coil 7 carries by the second conducting position of elastomeric element 9 or elastomeric element 9 Power supply stream.Coil 7 includes two kinds of fixed structures, and in first fixed structure, coil 7 is directly fixedly connected with the phase of extension 61； In the second fixed structure, there is relative motion distance, relative motion distance in the direction of the optical axis between coil 7 and extension 61 Between 10 microns and 1 millimeter.The control of power supply control apparatus sends a control signal to driver element and then is provided in camera The 7 corresponding drive signal of coil of module, the first conducting position, the second conducting position effect be suitable to power supply control apparatus via Those conducting positions are coil power supply, selectable not led to using the first conducting position, the second conducting position, power supply control apparatus Cross wire directly (connection) in electrical contact in coil be coil power supply.
In first fixed structure, there is two kinds of type of drive, the first type of drive in the electric current：Coil 7 is passed through and phase The electric current consistent to direction, push directly on the camera lens module 30 and move；Second type of drive：Coil 7 is passed through and phase The electric current consistent to inverse direction, camera lens module 30 is stored certain elastic potential energy and be then passed through again and forward direction relatively The consistent electric current in direction, camera lens module 30 is promoted to move, and it is static under frictional force effect.
Current driver mode is in the second fixed structure：The electric current consistent with relative inverse direction is passed through for coil 7, Coil 7 is stored certain elastic potential energy and be then passed through the electric current consistent with relative direction again, electromagnetic force is done just Work(, coil 7 accumulate kinetic energy and collided with the camera lens module 30, to promote the camera lens module 30 to move, and rubbed It is static under power effect.In addition, camera module is additionally provided with pedestal 10, pedestal 10, which is arranged on image-forming module 12, plays restriction mirror The effect of the optical axis direction movement position of head module 30, camera module may also include infrared fileter, be layed in image-forming module 12 Imaging sensor photosurface on.
Second embodiment：
Referring to Fig. 4, Fig. 5, Fig. 8, Fig. 9, Figure 10, Fig. 4 is the camera according to second of embodiment of the present invention The structural decomposition diagram of module；Fig. 5 is according to side of the camera module of second of embodiment of the present invention along optical axis direction Face sectional view；
The control that driver element passes through power supply control apparatus is that the electric current being passed through in coil 7 ' is pulsed, makes the mirror Head module 30 ' realizes that noncontinuity is moved, and the camera lens module 30 ' is main to be included motion load seat 6 ', be placed in motion load seat 6 ' The camera lens in portion (does not mark) the ratio between absolute value of maxima and minima of pulse current and is at least 1.2, adopts in the present embodiment With 2 times, and the single pulsewidth of pulse current is less than 2s, is in the present embodiment 1s.At the first moment, driver element passes through The control of power supply control apparatus is passed through initial current to coil 7 ', makes coil 7 ' and the geo-stationary of magnetic part 4 ', passes through detection The value of voltage divided by electric current in the detection coil 7 ' of feedback unit remains the first relation, i.e.,：U/I=R.Then, will progressively The size of initial current is increased, makes coil 7 ' and magnetic part 4 ' that relative motion occur, causes the voltage divided by electricity in coil 7 ' The value of stream is the second relation, i.e. U/I ＞ R；Detect the first relation of the value of voltage divided by electric current in feedback unit detection coil 7 ' The change of generation can interpolate that coil 7 ' and magnetic part 4 ' there occurs relative motion, and obtain making coil 7 ' and magnetic part 4 ' occur the critical electric current value of relative motion.Wherein, the motion of camera lens module 30 ' is along optical axis direction relative to elastomeric element 9 ' Move forward or backwards relatively, it is described each time motion has the first move distance forward or backwards relatively, described first Move distance is by the pulse current size in the radial direction normal pressure of the elastomeric element 9 ', the coil 7 ', climbing speed, waveform Coefficient of friction between width, camera lens module 30 ' and elastomeric element 9 ' determines；Specially：
The range formula of single step campaign
Wherein, n is the active coil number of turn of cutting magnetic line, and B is magnetic induction intensity, and L is the effective length of a circle coil, M is the quality of moving component, and f is frictional force size, IwIt is driving current, θ is the angle of the lens barrel direction of motion and gravity, Δ t It is square wave pulse width.
First move distance can be changed by changing wherein one or more parameters, to control the camera lens module 30 ' Motion.
In another embodiment, coil 7 ' keeps geo-stationary to be fixedly arranged on camera lens module 30 ' with camera lens module 30 ', The camera lens module 30 ' it is direct or indirect be pressed against sleeve module 20 '；Between camera lens module 30 ' and the sleeve module 20 ' With radial pressure, produced by the pressure between the camera lens module 30 ' and the sleeve module 20 ' along optical axis direction Frictional force, the frictional force can make the relatively described sleeve module 20 ' of the camera lens module 30 ' remains stationary in the direction of the optical axis State；Driver element by power supply control apparatus (such as：Power supply) control be that the electric current that is passed through is in coil 7 ' Pulsed, make the camera lens module 30 ' realize noncontinuity move, the camera lens module 30 ' mainly include motion carry seat 6 ', It is placed in 6 ' internal camera lens of motion load seat and (does not mark) the ratio between absolute value of maxima and minima of pulse current at least 1.2, in the present embodiment using 2 times, and the single pulsewidth of pulse current is less than 2s, is in the present embodiment 1s.First During the moment, driver element is passed through initial current by the control of power supply control apparatus to coil 7 ', in the present embodiment using electricity Property contact jaw 14 ' be fixed on image-forming module 12 ', power supply control apparatus is by being electrically connected with contravention 14 ' again by wire (for mark) Being electrically connected at coil 7 ' or coil block 7 ', (coil block 7 ' also includes clamping coil and contacted with camera lens module 30 ' Contact component 9 '), the power supply to coil 7 ' can be directly electric by coil 7 ' or coil block 7 ' and power supply control apparatus by wire Property connection；In another embodiment, coil 7 ' makes coil 7 ' and the geo-stationary of magnetic part 4 ', by the inspection for detecting feedback unit The value of voltage divided by electric current in test coil 7 ' remains the first relation, i.e.,：U/I=R.Then, initial current will progressively be increased Size, make coil 7 ' and magnetic part 4 ' that relative motion occur, it is second to cause the value of the voltage in coil 7 ' divided by electric current Relation, i.e. U/I ＞ R；Detect the change energy that the first relation of the value of voltage divided by electric current in feedback unit detection coil 7 ' occurs Coil 7 ' and magnetic part 4 ' are enough judged there occurs relative motion, and obtain making coil 7 ' and magnetic part 4 ' that relative fortune occur Dynamic critical electric current value.Due in another embodiment to be provided with elastomeric element 9 ', the motion of camera lens module 30 ' be relative to Sleeve module 20 ' is moved forward or backwards relatively along optical axis direction, it is described each time relatively forward or backwards motion have First move distance, first move distance is by the radial pressure between the camera lens module 30 ' and sleeve module 20 ', institute State the friction between pulse current size in coil 7 ', climbing speed, waveform widths, camera lens module 30 ' and sleeve module 20 ' Coefficient determines；Specially：
The range formula of single step campaign
Wherein, n is the active coil number of turn of cutting magnetic line, and B is magnetic induction intensity, and L is the effective length of a circle coil, M is the quality of moving component, and f is frictional force size, IwIt is driving current, θ is the angle of the lens barrel direction of motion and gravity, Δ t It is square wave pulse width.
First move distance can be changed by changing wherein one or more parameters, to control the camera lens module 30 ' Motion.
Refer to shown in Fig. 4, Fig. 5, in another embodiment of the invention, camera lens module 30 ' also include motion carry seat 6 ', Lens barrel (not marking), selectable offer friction means (not marking)；
Lens barrel is placed in motion and carried in seat 6 ', motion carry seat 6 ' and lens barrel can merge into a single whole motion carry seat 6 ' set it is oriented Spaced some extensions 61 ' of outer extension, the outer surface that motion carries seat 6 ' are provided with coil 7 ', and coil 7 ' is arranged at institute Between the extension 61 ' stated and it may be adapted to together with camera lens module 30 ' move；Sleeve module 20 ' corresponds to the position of coil 7 ' Place, magnetic part 4 ' is set；Between sleeve module 20 ' and camera lens module 30 ', elastomeric element 9 ' is provided with, it is interchangeable also Stiff contact component 9 ' is provided with, friction means are placed between extension 61 ' and the part 9 ', described extension 61 ' directly can also contact in described part 9 ', it should be pointed out that, described part 9 ' also may be included in corresponding coil block 7 ', its major function is suitable to clamp standoff coil 7 ' and is contacted with motion load seat 6 '；Do not use friction portion in another embodiment Part, the extension 61 ' of camera lens module 30 ' (or the motion that camera lens module 30 ' includes carries seat 6 ') directly connect with coil block 7 ' Touch.Camera module also includes：Pedestal 10 ', pedestal 10 ', which is arranged on image-forming module 12 ' to play, limits the optical axis of camera lens module 30 ' The working coil 7 ' of direction movement position is directly contacted with power supply control apparatus, and power supply control apparatus is that coil 7 ' provides electricity Stream, selectable offer are electrically connected with contravention 14 ', are electrically connected with the printed circuit board (PCB) that contravention 14 ' is fixed, is welded in image-forming module 12 ' On, power supply control apparatus, which is electrically connected at, is electrically connected with contravention 14 ', then is connected directly to coil 7 ' via wire.Coil 7 ' includes Two kinds of fixed structures, in first fixed structure, coil 7 ' directly carries the extension 61 ' on seat 6 ' with motion and is mutually fixedly connected；The Coil 7 ' described in two fixed structures and motion have relative motion distance along optical axis direction between carrying seat 6 ', relative motion away from From between 10 microns and 1 millimeter.The control of power supply control apparatus sends a control signal to driver element and then is provided in image The corresponding drive signal of coil 7 ' of head mould group.In the first fixed structure of second embodiment, there are two kinds of driving sides in electric current Formula,
First type of drive：Coil 7 ' is passed through the electric current consistent with relative direction, causes to push directly on the mirror Head module 30 ' is mobile；
Second type of drive：Coil 7 ' is passed through the electric current consistent with relative inverse direction, deposits the camera lens module 30 ' Certain elastic potential energy is stored up, and is then passed through the electric current consistent with relative direction again, causes to promote the camera lens mould Block 30 ' is mobile, and static under frictional force effect.In second fixed structure, current driver mode is：First give coil 7 ' are passed through the electric current consistent with relative inverse direction, coil 7 ' is stored certain elastic potential energy, and be then passed through again with The electric current consistent with respect to direction, electromagnetic force do positive work, and coil 7 ' accumulates kinetic energy and touched with the camera lens module 30 ' Hit, to promote the camera lens module 30 ' mobile, and it is static under frictional force effect.
3rd embodiment
It refer to Fig. 6, Fig. 7.Fig. 6 is illustrated according to the STRUCTURE DECOMPOSITION of the camera module of the third embodiment of the present invention Figure；
Fig. 7 is according to top view of the camera module of the third embodiment of the invention along optical axis direction；Can be with from figure Find out, include according to camera module of the present invention：Image-forming module 12 ", sleeve module 20 ", it is placed in sleeve module 20 " In may correspond to camera lens module 30 " that sleeve module 20 moves relative to optical axis direction (this part can refer to first embodiment, But the camera lens module 30 " in the present embodiment is not provided with friction means), at least one coil 7 " (be in the present embodiment one Coil), at least one magnetic part 4 " (be in the present embodiment be vertically arranged 2 magnetic parts that can be combined to, but not with This is limited), the elastomeric element 9 " that is arranged between camera lens module 30 " and sleeve module 20 ", wherein, in order in static shape Electric current is not needed to maintain the inactive state so as to reduce the power consumption of whole camera module under state, according to institute of the present invention In the camera module stated, elastomeric element 9 " snaps connection and is arranged at camera lens on camera lens module 30 ", elastomeric element 9 " is pressed against An electric conductor 13 " between module 30 " and sleeve module 20 ", electric conductor 13 " and the geo-stationary of sleeve module 20 " direct or It is indirectly fixed；Elastomeric element 9 " is changed into camera lens module 30 " and the integral electrical conductor of elastomeric element 9 " perpendicular to the shape of optical axis direction 13 " apply radial direction normal pressure, and elastomeric element 9 " produces edge by normal pressure on the contact surface of electric conductor 13 " and elastomeric element 9 " The frictional force of optical axis direction, frictional force can make camera lens module 30 " with the integral relative sleeve module 20 " of elastomeric element 9 " in optical axis side Upward remains stationary state；Coil 7 " keeps geo-stationary to be fixedly arranged on camera lens module 30 " with camera lens module 30 ", may be selected , the camera lens module 30 " it is direct or indirect be pressed against sleeve module 20 ", in lens barrel module 30 " directly against in sleeve die When on block 20 ", electric conductor 13 ", elastomeric element 9 " can not be used, the effect of electric conductor 13 " is that power supply control apparatus is led by this Electric body 13 " is powered for coil 7 ", and one end of elastomeric element 9 " is suitable to buckle, connects, is fixedly arranged on coil 7 "；Coil 7 " further with Camera lens module 30 " connects, suitable for together being moved along optical axis direction with camera lens module 30 "；Elastomeric element 9 " is selectable using firm Property contact component, is not limited only to elastic construction.；There is radial pressure between camera lens module 30 " and the sleeve module 20 ", lead to Cross the pressure and frictional force along optical axis direction is produced between the camera lens module 30 " and the sleeve module 20 ", it is described to rub The relatively described sleeve module of camera lens module remains stationary state in the direction of the optical axis can be made by wiping power.And
In the present embodiment, supply unit provides electric current for the camera module, is filled via the power supply control of image-forming module Put (as shown in Figure 8) and be controlled and provide electric current for coil 7 ", coil 7 " matches with camera lens module 30 ", camera lens module 30 " by To the electromagnetic force along optical axis direction, electromagnetic force does the driving force to move along a straight line as camera lens module 30 " along optical axis direction, to drive The camera lens module 30 " moves.
Referring also to Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Fig. 8 are the voltage and electricity under the voltage source driving according to the present invention Flow signal schematic representation；Fig. 9 is the electric current and voltage signal schematic diagram under the driven with current sources according to the present invention；Figure 10 is according to this The control camera module lens barrel of invention makees the flow chart of the method for single step campaign.Specifically, driver element (not marking) passes through The control of power supply control apparatus (not marking) is that the electric current being passed through in coil 7 " is pulsed, makes the camera lens module 30 " real The ratio between existing noncontinuity motion, absolute value of maxima and minima of pulse current are at least 1.2, use in the present embodiment 2 times, and the single pulsewidth of pulse current is less than 2s, is in the present embodiment 1s.At the first moment, driver element passes through confession The control of controller for electric consumption is passed through initial current to coil 7 ", makes coil 7 " and the geo-stationary of magnetic part 4 ", anti-by detecting The value of voltage divided by electric current in the detection coil 7 " of feedback unit (not marking) remains the first relation, i.e.,：U/I=R.Then, The size of initial current will be progressively increased, make coil 7 " and magnetic part 4 " that relative motion occur, cause the voltage in coil 7 " Divided by the value of electric current is the second relation, i.e. U/I ＞ R；Detect the of the value of voltage divided by electric current in feedback unit detection coil 7 " The change that one relation occurs can interpolate that coil 7 " and magnetic part 4 " there occurs relative motion, and obtain making coil 7 " and magnetic Property part " 4 occur relative motions critical electric current value.Wherein, the motion of camera lens module 30 " is the phase with the one of elastomeric element 9 " For the moving forward or backwards relatively along optical axis direction of sleeve module 20 ",；The moving forward or backwards relatively each time With the first move distance, first move distance is by the radial direction normal pressure of the elastomeric element 9 ", the coil 7 " Coefficient of friction between pulse current size, climbing speed, waveform widths, elastomeric element 9 " and electric conductor 13 " determines；Specifically For：
The range formula of single step campaign
Wherein, n is coil turn, and B is magnetic induction intensity, and L is the effective length of a circle coil, and m is the matter of moving component Amount, f are frictional force sizes, IwIt is driving current, θ is the angle of the lens barrel direction of motion and gravity, and Δ t is square wave pulse width.
First move distance can be changed by changing wherein one or more parameters, to control the camera lens module 30 Motion.
As shown in Figure 6, Figure 7, the camera lens module 30 " may also include motion and carry seat 6 ", lens barrel (in motion load seat not Indicate)；
Lens barrel is placed in motion and carried in seat 6 ", motion carry seat 6 " and lens barrel can merge into a single whole shaping also individually respectively into Type；Motion, which carries seat 6 ", to be had in some extensions 61 " radially；Coil 7 " is placed in the extension 61 ", and suitable for Camera lens module 30 " moves together；.In addition, the present embodiment can also be identical with first embodiment, it is corresponding to be gone back in sleeve module 20 " Including magnet yoke ring 2 " and the internal cartridge unit 1 " of the magnet yoke ring 2 " is placed in, cartridge unit 20 " stretches out the magnet yoke ring 2 " More than outer face 0.2mm, play a part of that camera lens module 30 " is oriented to and protected for camera lens module 30 ".Furthermore in magnet yoke ring 2 " Yoke block 3 " can be equipped with, yoke block 3 " is magnetic conductive material, is served as the effect of the magnetic conduction of magnetic part 4 "；Yoke block 3 " and yoke There is the air gap between the internal face of ring 2 ", coil 7 " is placed in the air gap and can moved along optical axis direction, the air gap Optical axis direction length account for camera module optical axis direction gross thickness more than 1/3rd.Wherein, the magnetic of sleeve module 20 " Yoke ring 2 ", cartridge unit 1 " are formed in one or are separately provided with yoke block 3 ".
Coil 7 " is connected with the first conducting position (not marking) on camera lens module 30 ", the first conducting position and elasticity Part 9 " is contacted, and elastomeric element 9 ", which is contacted with feeder ear, to be suitable to pass through means of power, and elastomeric element 9 " can be conductive Or there is the second conducting position, so that feeder ear can be line by the conducting position of elastomeric element 9 " or elastomeric element 9 " Circle 7 " provides electric current.Coil 7 " includes two kinds of fixed structures, in first fixed structure, coil 7 " directly with the phase of extension 61 " It is fixedly connected；In the second fixed structure, there is relative motion distance in the direction of the optical axis between coil 7 " and extension 61 ", Relative motion distance is between 10 microns and 1 millimeter.The control of power supply control apparatus send a control signal to driver element and then It is provided in the corresponding drive signal of coil 7 " of camera module in first fixed structure, the electric current has two kinds of driving sides Formula, the first type of drive：Coil 7 " is passed through the electric current consistent with relative direction, pushes directly on the camera lens module 30 " It is mobile；Second type of drive：Coil 7 " is passed through the electric current consistent with relative inverse direction, makes the storage of camera lens module 30 " certain Elastic potential energy and be then passed through the electric current consistent with relative direction again, promote camera lens module 30 " to move, and rubbing Wipe static under power effect.
Current driver mode is in the second fixed structure：The electricity consistent with relative inverse direction is passed through for coil 7 " Stream, coil 7 " is stored certain elastic potential energy and be then passed through the electric current consistent with relative direction, electromagnetic force again Positive work is done, coil 7 " accumulates kinetic energy and collided with the camera lens module 30 ", to promote the camera lens module 30 " mobile, and It is static under frictional force effect.In addition, camera module is additionally provided with pedestal 10 ", pedestal 10 " is arranged on image-forming module 12 " Play a part of limiting the optical axis direction movement position of camera lens module 30 ", camera module may also include infrared fileter, be layed in On the photosurface of the imaging sensor of image-forming module 12 ".
In the structure that refer to first embodiment, second embodiment and 3rd embodiment, camera lens module 30,30,30 " is most There are two kinds of optical focusing states during first optical states, be respectively：
The first state：With the focusing that direct imaging is carried out to infinite far object when camera lens module 30,30 ', 30 " is initial State；
Second of state：Camera lens module 30,30 ', 30 " does not have when initial carries out direct imaging to infinite far object The state of focusing, camera lens module 30,30 ', 30 " need to by coil 7,7 ', 7 " provide electric current, by camera lens module 30,30 ', 30 " in The telescopic process stretched out in sleeve module 20 ', it is adjusted into the state for the focusing being imaged to infinite far object.When described During two kinds of states, camera lens module 30,30 ', 30 " complete to stretch out the end face of sleeve module 20,20 ', 20 " or retraction sleeve module 20, Time in 20 ', 20 " is less than 20s.When first state or the second state, camera lens module 30,30 ', 30 " is discontinuously to transport Dynamic, the distance of each persistent movement is not more than 100 microns, realizes the function of search focusing position.Camera lens module 30,30 ', 30 " Relative to the sleeve module 20,20 ', 20 " it is mobile when, by the output image of image-forming module 12,12 ', 12 ", described in detection Image definition, determined according to the change of image definition and match the first state or the second state, realize the camera lens The flexible and/or focus function of module 30,30 ', 30 ".
In first embodiment, second embodiment and 3rd embodiment, as Fig. 8 and Fig. 9 respectively illustrate two kinds it is different The schematic diagram of voltage source and current source is respectively adopted.Ignore the inductance of coil 7,7 ', 7 ", the both end voltage of coil 7,7 ', 7 " and electricity Flow relation is U=RI+nBLv, wherein, U is the both end voltage of coil 7,7 ', 7 ", and R is the resistance value of coil 7,7 ', 7 ", and I is coil 7th, the current value in 7 ', 7 ", n is coil turn, and B is magnetic induction intensity, and L is the effective length of a circle coil 7,7 ', 7 ", and v is The movement velocity of coil 7,7 ', 7 ".
It can be seen from the formula, as shown in figure 8, during using voltage source, magnitude of voltage U is constant, and a. moves when coil 7,7 ', 7 " When, according to mechanics principle, movement velocity can first increase again it is constant, so the electric current I in coil 7,7 ', 7 " can first reduce again it is permanent It is fixed；B. when coil 7,7 ', 7 " does not move, the current Iconst in coil 7,7 ', 7 ".
And as shown in figure 9, during using current source, current value I is constant, and a. is when coil 7,7 ', 7 " moves, with motion speed The increase of degree, the both end voltage U of coil 7,7 ', 7 " also gradually increase；B. when coil does not move, the both end voltage U of coil 7,7 ', 7 " It is constant.Thus just can control camera lens module 30 or 30 ' motion.
Figure 10 shows the flow chart for the method for making single step campaign according to the control camera module lens barrel of the present invention.Please be same When reference picture 8, Fig. 9 in lens barrel motion process, in detection feedback unit detection coil 7,7 ', 7 " because camera lens module 30,30 ', The change of the value of voltage divided by electric current caused by 30 " motions, by coherent detection information transmission to power supply control apparatus, power supply control According to the change of this ratio, the critical electric current value of relative motion occurs device processed for the camera lens module 30,30 ', 30 " that must send as an envoy to, and Corresponding control signal is provided to driver element, driver element provides drive signal to camera module, controls in camera module Camera lens module 30,30 ', 30 " respectively the coil 7 in first embodiment, 3rd embodiment, 7 " synchronous optical axis directions motions or Optical axis direction motion synchronous with magnetic part 4 ' in a second embodiment, and by constantly detecting feedback, control calculating, driving Cause the forward direction relative in sleeve module 20,20 ', 20 " of camera lens module 30,30 ', 30 " and counter motion.
Specifically, change of the power supply control apparatus according to voltage divided by the value of electric current, leads to upper corresponding in coil 7,7 ', 7 " The pulse current of size, the electromagnetic force of driving camera lens module 30,30 ', 30 " is overcome the resistances such as frictional force, promote lens barrel relative The contact surface of elastomeric element 9,9 ', 9 " slides, and then stops at a certain position under kinetic force of friction effect, i.e., camera lens module 30 or 30 ' realize a stepping.
Preferably, a stepping of camera lens module 30,30 ', 30 ", i.e. the relative resilient part of camera lens module 30,30 ', 30 " 9th, 9 ', 9 " contact surface slides certain distance, and selectable camera lens module 30,30 ', 30 " is the one of elastomeric element 9,9 ', 9 ", Now, elastomeric element 9,9 ', 9 " slides certain distance with camera lens module 30,30 ', 30 " relative to sleeve module 20,20 ', 20 ", The distance is by the factor such as radical elasticity, axial rigidity, electromagnetic force, the coefficient of friction decision of elastomeric element 9,9 ', 9 ", each hyposynchronization The distance entered is not more than 100 microns, and possesses repeatability, so repeating above-mentioned stepping process, it becomes possible to control camera lens module 30th, 30 ', 30 " position, the flexible and/or focus function of camera module is realized.
During the stepping of camera lens module 30,30 ', 30 ", camera lens module 30,30 ', 30 " is changed into relative with module from motion In static process, by the control of electromagnetic actuation force, make an each stepping, i.e., camera lens module 30,30 ', 30 " is with respect to bullet Property part 9,9 ', 9 " contact surface slide certain distance.
By means of the optimal control of camera can be realized according to control method of the present invention and camera module, from And enable this new camera module camera lens module 30,30 ', 30 " is stretched out outside module, ensure constant in the angle of visual field Under the conditions of, the size of sensitive chip is increased, improves picture quality, while its is simple in construction, and it is light can be applied to mobile phone, pad etc. In low profile electronic equipment.Furthermore extra electric current is not needed when camera lens module 30,30 ', 30 " is static, so as to save shooting The power consumption of head mould group, this point are even more important for portable set.
Although the present invention is elaborated and described in the drawings and foregoing description, it is considered that this is illustrated and description is to say It is bright property and exemplary rather than restricted；The invention is not restricted to above-mentioned embodiment.
The those skilled in the art of those the art can be by studying specification, disclosure and accompanying drawing and appended Claims, understand and implement other changes to the embodiment of disclosure.In the practical application of the present invention, one zero The function of cited multiple technical characteristics in the possible perform claim requirement of part.In the claims, word " comprising " is not excluded for Other elements and step, and wording "one" be not excluded for plural number.Any reference in claim should not be construed as Limitation to scope.

Claims (25)

1. a kind of control method of camera module, wherein, the camera module includes image-forming module, sleeve module, placement It can correspond to camera lens module, at least one line that sleeve module is moved relative to optical axis direction in the sleeve module Circle, at least one magnetic part, the control method comprise the following steps：
A. the camera lens module is directly pressed against sleeve module, wherein, have between camera lens module and the sleeve module Radial pressure, the frictional force along optical axis direction is produced between the camera lens module and the sleeve module by the pressure, The frictional force enables to the relatively described sleeve module of camera lens module remains stationary state in the direction of the optical axis；And
B. directly it is at least one coil with electric current, at least one coil and the camera lens module phase by wire Matching, the camera lens module is by the electromagnetic force along the optical axis direction, and the electromagnetic force is as the camera lens module described in Optical axis direction does the driving force to move along a straight line, to drive the camera lens module to move, wherein at least one coil be suitable to The camera lens module moves together, wherein at least one coil is directly electrically connected with by wire with power supply control apparatus.
2. according to the method for claim 1, it is characterised in that in the step b, be passed through at least one coil Electric current be pulsed so that the camera lens module realize noncontinuity move；
The ratio between absolute value of maxima and minima of the pulse current is at least 1.2；
The single pulsewidth of the pulse current is less than 2s.
3. according to the method for claim 2, it is characterised in that in the step b, be passed through at least one coil Initial current, makes at least one coil and at least one magnetic part geo-stationary, at least one coil Voltage divided by the value of electric current remain the first relation, i.e.,：U/I=R.
4. according to the method for claim 3, it is characterised in that progressively increase the size of the initial current, make it is described extremely Relative motion occurs for a few coil and at least one magnetic part, cause voltage at least one coil divided by The value of electric current is the second relation, i.e. U/I>R；Detect the value of voltage divided by electric current at least one coil described first is closed The change that system occurs can interpolate that at least one coil and at least one magnetic part, and there occurs relative motion.
5. according to the method for claim 1, it is characterised in that in the step b, the motion of the camera lens module is phase For sleeve module moving forward or backwards relatively along optical axis direction, it is described each time relatively forward or backwards motion have First move distance, first move distance by the radial pressure between the camera lens module and sleeve module, it is described at least The friction system between pulse current size, climbing speed, waveform widths, the camera lens module and sleeve module in one coil Number determines；First move distance can be changed by changing wherein one or more parameters, to control the fortune of the camera lens module It is dynamic.
6. according to the method for claim 1, it is characterised in that the camera lens module also includes motion and carries seat, lens barrel；
The lens barrel is placed in the motion and carried in seat, and the motion carries seat and the lens barrel and merged into a single whole shaping or independent dress With shaping；The motion, which carries seat tool, to be had in some extensions radially；At least one coil is placed in the extension In, and suitable for being moved together with the camera lens module.
7. according to the method for claim 6, it is characterised in that the sleeve module includes magnet yoke ring and is placed in the yoke Cartridge unit inside ring, the cartridge unit stretch out more than the outer face 0.2mm of the magnet yoke ring, played as the camera lens mould Block is oriented to and the effect of protection camera lens module.
8. according to the method for claim 7, it is characterised in that yoke block is equipped with the magnet yoke ring；The yoke block with There is the air gap between the magnet yoke ring internal face, at least one coil is placed in the air gap and can be along light Direction of principal axis move, the optical axis direction length of the air gap account for the optical axis direction gross thickness of the camera module three/ More than one.
9. according to the method for claim 7, it is characterised in that the magnet yoke ring of the sleeve module, the sleeve list It is first to be formed in one or be separately provided with the yoke block.
10. according to the method for claim 6, it is characterised in that at least one coil includes two kinds of fixed structures, In first fixed structure, at least one coil is directly mutually fixedly connected with the extension；In the second fixed structure, institute State has relative motion distance in the direction of the optical axis between at least one coil and the extension, the relative motion distance exists Between 10 microns and 1 millimeter.
11. according to the method for claim 10, it is characterised in that in the first fixed structure, the electric current is present Two kinds of type of drive,
First type of drive：At least one coil is passed through the electric current consistent with relative direction, pushes directly on described Camera lens module moves；
Second type of drive：At least one coil is passed through the electric current consistent with relative inverse direction, makes the camera lens mould Block stores certain elastic potential energy and is then passed through the electric current consistent with relative direction again, promotes the camera lens module It is mobile and static under frictional force effect.
12. according to the method for claim 10, it is characterised in that in second fixed structure, the electric current driving Mode is：The electric current consistent with relative inverse direction is passed through at least one coil, deposits at least one coil Store up certain elastic potential energy and be then passed through again and with respect to the consistent electric current of direction, electromagnetic force does positive work, it is described extremely A few coil accumulates kinetic energy and collided with the camera lens module, to promote the camera lens module to move, and in frictional force It is static under effect.
13. according to the method for claim 1, it is characterised in that the camera lens module can have two kinds of structure shapes in step a State,
The first state：State with the focusing that direct imaging is carried out to infinite far object when the camera lens module is initial；
Second of state：The camera lens module does not have the shape for the focusing that direct imaging is carried out to infinite far object when initial State, the camera lens module need to be by the coil with electric current, the telescopic process that camera lens module is stretched out in sleeve module, adjust The whole state for entering the focusing being imaged to infinite far object.
14. according to the method for claim 13, it is characterised in that when second of state, the camera lens module is complete It is less than 20s into the time stretched out in sleeve module end face or retraction sleeve module.
15. according to the method for claim 14, it is characterised in that when the first state or the second state, the mirror For head module discontinuously to move, the distance of each persistent movement is not more than 100 microns, realizes the function of search focusing position.
16. according to the method for claim 15, it is characterised in that the camera lens module moves relative to the sleeve module When, by the image-forming module output image, described image definition is detected, is determined simultaneously according to the change of described image definition The first state or the second state are matched, realizes the flexible and/or focus function of the camera lens module.
17. a kind of camera module, the camera module includes image-forming module, sleeve module, is placed in the sleeve module In can correspond to sleeve module moved relative to optical axis direction camera lens module, at least one coil, at least one magnetic Part, it is characterised in that
The camera lens module is directly pressed against sleeve module；There is radial pressure between camera lens module and the sleeve module, The frictional force along optical axis direction, the frictional force are produced between the camera lens module and the sleeve module by the pressure Enable to the relatively described sleeve module of camera lens module remains stationary state in the direction of the optical axis；
The camera module also includes power supply control apparatus, and it directly provides electricity by wire at least one coil Stream, at least one coil match with the camera lens module, and the camera lens module is by the electromagnetism along the optical axis direction Power, the electromagnetic force do the driving force to move along a straight line as the camera lens module along the optical axis direction, to drive the camera lens Block motion, wherein at least one coil is suitable to move together with the camera lens module, wherein at least one coil Directly it is electrically connected with by wire with the power supply control apparatus.
18. camera module according to claim 17, it is characterised in that the power supply control apparatus is described at least one The electric current being passed through in individual coil is pulsed, the camera lens module is realized that noncontinuity is moved；
The ratio between absolute value of maxima and minima of the pulse current is at least 1.2；
The single pulsewidth of the pulse current is less than 2s.
19. camera module according to claim 18, it is characterised in that the power supply control apparatus is described at least one Individual coil is passed through initial current, makes at least one coil and at least one magnetic part geo-stationary, it is described at least The value of voltage divided by electric current in one coil remains the first relation, i.e.,：U/I=R.
20. camera module according to claim 19, it is characterised in that the size of the initial current is progressively increased, Make at least one coil and at least one magnetic part that relative motion occur, cause at least one coil The value of voltage divided by electric current is the second relation, i.e. U/I>R；Detect the institute of the value of voltage divided by electric current at least one coil The change for stating the generation of the first relation can interpolate that at least one coil and at least one magnetic part there occurs relative Motion.
21. camera module according to claim 17, it is characterised in that the motion of the camera lens module is relative to set Cylinder mould block moves forward or backwards relatively along optical axis direction, and the motion forward or backwards relatively each time has the first fortune Dynamic distance, first move distance is by the radial pressure between the camera lens module and sleeve module, at least one line The coefficient of friction between pulse current size, climbing speed, waveform widths, the camera lens module and sleeve module in circle is determined It is fixed；First move distance can be changed by changing wherein one or more parameters, to control the motion of the camera lens module.
22. camera module according to claim 17, it is characterised in that the camera lens module also include motion carry seat, Lens barrel；
The lens barrel is placed in the motion and carried in seat, and the motion carries seat and the lens barrel and merged into a single whole shaping or independent dress With shaping；The motion, which carries seat tool, to be had in some extensions radially；At least one coil is placed in the extension In, and suitable for being moved together with the camera lens module.
23. camera module according to claim 22, it is characterised in that the sleeve module includes magnet yoke ring with being placed in Cartridge unit inside the magnet yoke ring, the cartridge unit stretch out more than the outer face 0.2mm of the magnet yoke ring, played as institute State the effect that camera lens module is oriented to and protects camera lens module.
24. camera module according to claim 23, it is characterised in that yoke block is equipped with the magnet yoke ring；It is described Have the air gap between yoke block and the magnet yoke ring internal face, at least one coil be placed in the air gap and It can be moved along optical axis direction, the optical axis direction length of the air gap accounts for the optical axis direction gross thickness of the camera module More than 1/3rd.
25. camera module according to claim 22, it is characterised in that at least one coil includes two kinds of fixations Structure, in first fixed structure, at least one coil is directly mutually fixedly connected with the extension；In the second fixed knot In structure, there is relative motion distance, the relative fortune in the direction of the optical axis between at least one coil and the extension Dynamic distance is between 10 microns and 1 millimeter.
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