CN101685235A - Jitter correction device of camera - Google Patents
Jitter correction device of camera Download PDFInfo
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- CN101685235A CN101685235A CN200910177610A CN200910177610A CN101685235A CN 101685235 A CN101685235 A CN 101685235A CN 200910177610 A CN200910177610 A CN 200910177610A CN 200910177610 A CN200910177610 A CN 200910177610A CN 101685235 A CN101685235 A CN 101685235A
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- shake
- inside casing
- correction device
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- jitter correction
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
- G03B2205/0053—Driving means for the movement of one or more optical element
- G03B2205/0069—Driving means for the movement of one or more optical element using electromagnetic actuators, e.g. voice coils
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Abstract
The invention provides a jitter correction device for a camera with its drive unit (execution mechanism) having simple structure. The jitter correction device (30), correcting jitter through maintaining a lens and a camera module (20) of a shooting component orthogonal with an optical axis (O) and shaking a first axis (P) and a second axis (Y) which intersect mutually, is provided with an inner frame (32) for fixing the camera module inside, a middle frame (34) surrounding the first axis (P) from the outside of the inner frame and supporting the inner frame in a free shaking manner, an outer frame (36) surrounding the second axis (Y) from the outside of the middle frame and supporting the middle frame in a free shaking manner, and a voice coil motor (40) arranged at the bottom of the innerframe and the bottom of the outer frame. The voice coil motor (40) drives the inner frame (32) and the middle frame (34) to shake respectively around the first axis (P) and the second axis (Y).
Description
Technical field
The present invention relates to the jitter correction device of camera, the particularly shake (vibration) that produces when taking rest image of correction can photograph the jitter correction device that does not have image blurring image.
Background technology
Proposed multiple jitter correction device (image blur correction apparatus) at present,, taken clearly even when taking rest image, there is shake (vibration) also can prevent image blurring on the imaging surface.
For example, the spy opens 2006-65352 communique (patent documentation 1) and discloses a kind of " image blur correction apparatus ", it comes correction image fuzzy by move a specific lens combination (hereinafter referred to as " correction lens ") of controlling in the photographing optical system (imaging optical system) that is made of a plurality of lens combination on the both direction of mutually orthogonal in for the optical axis vertical plane thus.In patent documentation 1 in the disclosed image blur correction apparatus, move frame and frame is moved in rolling via pitching, for fixed frame on above-below direction (pitch orientation) and left and right directions (rolling direction) with can move freely supporting revise lens.
The spy opens 2008-26634 communique (patent documentation 2) and discloses a kind of " shake correction mechanism " of revising optics that include, this revise optics by with the direction of the optical axis intersection of imaging optical system on move, revise the fuzzy of the image that forms by imaging optical system.In patent documentation 2 in the disclosed correction optics,, on pitch orientation and rolling direction, can move freely twelve Earthly Branches for receiving cartridge and accept insurance and hold the lens holding frames of revising lens via pitching slide block and rolling slide block.
The spy opens 2006-215095 communique (patent documentation 3) and discloses a kind of " image blur correction apparatus ", and it can move the correction lens by little driving force, can be rapidly and carry out image blurring correction accurately.Patent documentation 3 disclosed image blur correction apparatus, have maintenance frame that keep to revise lens, on the first direction (pitch orientation) with being free to slide first slide block of this maintenances frame of supporting, on second direction (rolling direction), be free to slide twelve Earthly Branches accept insurance second slide block of holding frame, first coil electric motor of driving first slide block on the first direction and on second direction second coil electric motor of driving second slide block.
The spy open 2008-15159 communique (patent documentation 4) disclose a kind of have can with the direction of light shaft positive cross on the lens barrel of the shake correction optical system that is provided with movably.In patent documentation 4 in the disclosed shake correction optical system, the movable VR mechanism that disposes in the VR main body mechanism keeps revising lens (the 3rd lens combination), can with the XY plane of light shaft positive cross in move.
The spy opens 2007-212876 communique (patent documentation 5) and discloses a kind of " image blur correction apparatus ", correction lens that mobile frame keeps can be moved up in first and second party with the optical axis mutually orthogonal of lens combination, control by driver element and to make the optical axis of revising lens consistent, can correction image blur thus with the optical axis of lens combination.
The spy opens 2007-17957 communique (patent documentation 6) and discloses a kind of " image blur correction apparatus ", the action of its scioptics drive division, to direction and first and the second direction mutually orthogonal of conduct with the light shaft positive cross of lens combination, driving is used for the fuzzy correction lens of revising of the image of duplet lens system formation, comes correction image fuzzy.In patent documentation 6 in the disclosed image blur correction apparatus, with the side configuration lens drive division of the direction of the light shaft positive cross of revising lens.
The spy opens 2007-17874 communique (patent documentation 7) and discloses a kind of " image blur correction apparatus ", the correction lens that mobile frame is kept can move up in direction and first and the second party mutually orthogonal of conduct with the light shaft positive cross of lens combination, control and make the optical axis of revising lens consistent, can correction image blur thus with the optical axis of lens combination.These patent documentation 7 disclosed image blur correction apparatus have driver element, and this driver element has the coil and the magnet that can relatively move.Side in coil and the magnet is fixed on the mobile frame, and the opposing party is fixed on the supporting frame that supports mobile frame movably.In addition, these patent documentation 7 disclosed image blur correction apparatus have by the magnetic force that detects magnet and detect and revise first Hall element of first direction location information related of lens and second Hall element that detects and revise the second direction location information related of lens by the magnetic force that detects magnet.
Above-mentioned patent documentation 1～7 disclosed image blur correction apparatus (jitter correction device) all has to move in the plane vertical with optical axis adjusts the structure of revising lens.But there is complex structure in the image blur correction apparatus of this structure (jitter correction device), is not suitable for the problem of miniaturization.
In order to solve such problem, following a kind of image blur correction apparatus (image shake correction apparatus) has been proposed, it keeps the lens module (camera module) of lens and capturing element (imageing sensor) self to shake by making, and revises shake (image blurring).
For example, the spy opens 2007-41455 communique (patent documentation 8) and discloses a kind of " image shake correction apparatus of optical devices ", and it has the lens module that keeps lens and capturing element, the mount structure by this lens module of rotation axis rotatably support, applies driver element (topworks) that driving force makes lens module rotate for mount structure, makes driver element (topworks) apply the acting force applying unit (leaf spring) of acting force for the portion that is driven (rotor) of rotation axis by the portion that is driven (rotor) to rotation axis.Mount structure is made up of inside casing and housing.Driver element (topworks) is configured to from contact the portion that is driven (rotor) of rotation axis with the vertical direction of optical axis.Driver element (topworks) is made up of the service portion of piezoelectric element and rotation axis one side.Service portion drives rotation axis by the pitch vibration and the flexural vibrations of piezoelectric element.
In addition, the spy opens 2007-93953 communique (patent documentation 9) and discloses a kind of " jitter correction device of camera ", it has been accommodated in casing inside and has made capture lens and the incorporate camera module of imageing sensor, make camera module simultaneously and take light shaft positive cross, and can freely shake the earth's axis to first and second of orthogonal intersection at the center and be bearing on the casing, corresponding by the shake sensor to the shake of casing in the posture of the whole camera module of casing internal control, revise the shake when taking rest image.The jitter correction device of patent documentation 9 disclosed cameras has: from having fixed the inside casing outside of camera module, make first can free joltily support the center that this has fixed the inside casing of camera module at the center; Be fixed on the casing, make second housing that can free joltily support center at the center from the outside of center; Being installed in the dither signal from shake sensor (detecting the first sensor module of the shake of pitch orientation) in the center, corresponding makes inside casing center on first first driver element that shakes; Being installed in the dither signal from shake sensor (detecting second sensor assembly of the shake of rolling direction) in the housing, corresponding makes center center on second second driver element that shakes.First driver element by first stepping motor, make its rotational delay first train of reduction gears and with the gear unitary rotation of final level, via first Cam Follower that on inside casing, is provided with first cam of inside casing swing is formed.Second driver element by second stepping motor, make its rotational delay second train of reduction gears and with the gear unitary rotation of final level, form by second cam that second Cam Follower that is provided with on center shakes center.
The spy opens 2007-142938 communique (patent documentation 10) and discloses a kind of portable information terminal, and it has the function of the shake when using the correction of gyroscope constant angular velocity sensor to take.Correction for the shake of carrying out photographic images, need with the face of the light shaft positive cross of camera lens in set pitch axis mutually orthogonal, that become benchmark and axis of roll, detecting with the pitch axis is the rotation of rotary middle spindle and with the angular velocity of axis of roll as rotation two sides of rotary middle spindle.Patent documentation 10 discloses to have disposed in the side of filming apparatus and has detected around first gyroscope of the rotational angular velocity of the rotation of pitch axis and detect around second gyroscope of the rotational angular velocity of the rotation of axis of roll.
Above-mentioned patent documentation 1～7 disclosed image blur correction apparatus (jitter correction device) all move to adjust is revised lens in the plane vertical with optical axis, so have complex structure, be not suitable for the such problem of miniaturization.
On the other hand, in patent documentation 8 disclosed image shake correction apparatus,, use the topworks that forms by the service portion of piezoelectric element and rotation axis one side as driver element (topworks).Make service portion do elliptic motion, rotor (being driven portion) is rotated.When the application point place at the service portion of rotor (being driven portion) and topworks produces wearing and tearing, might hinder correct contact.Therefore, in order to lower this wearing and tearing, need to use special material as rotor (being driven portion).And, in the topworks that forms by piezoelectric element and service portion,, be difficult to make lens module to return its neutral position (initial position) because service portion is contacted with rotor (being driven portion).
In addition, in patent documentation 9 disclosed jitter correction devices,, use the combination of stepping motor, train of reduction gears and cam as driver element.Therefore, Cam Follower is contacted with the cam surface of cam.Therefore, the complex structure of driver element.In addition, because Cam Follower is contacted with the cam surface of cam, so be difficult to make camera module to return its neutral position (initial position).
As the shake sensor, patent documentation 10 disclosed portable information terminals only disclose use gyroscope constant angular velocity sensor.
[patent documentation 1] spy opens the 2006-65352 communique
[patent documentation 2] spy opens the 2008-26634 communique
[patent documentation 3] spy opens the 2006-215095 communique
[patent documentation 4] spy opens the 2008-15159 communique
[patent documentation 5] spy opens the 2007-212876 communique
[patent documentation 6] spy opens the 2007-17957 communique
[patent documentation 7] spy opens the 2007-17874 communique
[patent documentation 8] spy opens the 2007-41455 communique
[patent documentation 9] spy opens the 2007-93953 communique
[patent documentation 10] spy open the 2007-142938 communique (paragraph 0005, paragraph 0006, Fig. 2)
Summary of the invention
Therefore, the object of the present invention is to provide the jitter correction device simple in structure of a kind of driver element (topworks).
Another object of the present invention is to provide a kind of camera module that can easily make to return the jitter correction device of its neutral position (initial position).
Other purposes of the present invention will be followed the progress of explanation and become clear and definite.
According to the present invention, obtain following jitter correction device (30; 30A), by make keep lens (L1, L2, L3) and the camera module (20) of capturing element (28) center on and optical axis (O) quadrature, and first (P) crossing one another and second (Y) shake and revise shake, at this jitter correction device (30; Have 30A): at the inside casing (32) of internal fixation camera module (20), freely from the inside casing outside around first (P) joltily support the center (34) of this inside casing, from the center outside around second (Y) the free housing (36) that joltily supports center and be provided with in the bottom of the bottom of inside casing and housing, drive the voice coil motor (40) that inside casing (32) and center (34) are shaken around first (P) and second (Y).
Jitter correction device (30 in the invention described above; 30A), preferred voice coil motor (40) is for example by 4 utmost points magnetize magnet (42), coil substrate (44) and neutral holding plate (46) formation, described 4 utmost points magnet (42) that magnetizes is installed in the bottom of housing (36), around central shaft (C) rotation of housing 4 magnetic poles is set symmetrically; Described coil substrate (44) and this 4 utmost point magnet that magnetizes is arranged on the bottom of inside casing (32) opposite to each other, cross over 4 utmost points ground that magnetizes between the adjacent magnetic pole of magnet (42), be configured to optical axis (O) and be 4 coils of center balanced configuration (44-1,44-2,44-3,44-4); Described neutral holding plate (46), is installed on the coil substrate with 4 utmost points magnet that magnetizes under the state between 4 coils opposite to each other at double team.
In the jitter correction device (30) of the invention described above, can have and be used to detect the position detection unit (50) of inside casing (32) with respect to the position of housing (36).Position detection unit (50) can by be installed on the coil substrate (44), by detect 4 utmost points magnetize the magnetic force of magnet (42) detect follow around first Hall element (51) of the primary importance of shaking of first (P) and be installed on the coil substrate (44), detect second Hall element of following around the second place of shaking of second (Y) (52) and constitute by detecting the magnetize magnetic force of magnet (42) of 4 utmost points.
In the jitter correction device (30A) of the invention described above, can be fixed on housing (36) on the casing, inside casing (32) has outer wall, this outer wall have respectively with first and second (P, Y) first of quadrature and second side (32-1,32-2).At this moment, preferred jitter correction device (30A) also have in first side (32-1) of the outer wall of inside casing and a side of second side (32-2) go up install, detect inside casing (32) around the first shake sensor (61) of the shake of first (P) and in first side (32-1) of the outer wall of inside casing and the opposing party of second side (32-2) go up install, detect inside casing (32) and shake sensor (62) around second of the shake of second (Y).The first shake sensor can be made of first angular-rate sensor (61) that detects the rotational angular velocity that centers on first (P), and the second shake sensor can be by detecting around second angular-rate sensor (62) formation of the rotational angular velocity of second (Y).First angular-rate sensor for example is made of first gyro sensor (61), and second angular-rate sensor for example is made of second gyro sensor (62).
Reference marks in the above-mentioned parantheses is added in order to understand easily, and nothing but an example, the present invention is not limited to this.
In the present invention, as driver element (topworks), because use the voice coil motor that is provided with in the bottom of the bottom of inside casing and housing, so have the advantage of simple structure of driver element (topworks).
Description of drawings
Fig. 1 is the three-dimensional exploded view of Camera system that expression comprises the jitter correction device of first embodiment of the invention.
Fig. 2 is the planimetric map of Camera system shown in Figure 1.
Fig. 3 is the front cross-sectional view of Camera system shown in Figure 1.
Fig. 4 is the three-dimensional exploded view that is illustrated in the voice coil motor (VCM) that uses in the jitter correction device shown in Figure 1.
Fig. 5 is used to illustrate the action of voice coil motor shown in Figure 4 (VCM).
Fig. 6 is the block scheme of structure that expression has the mobile phone of camera, and this camera has been installed Fig. 1 to Camera system shown in Figure 3.
Fig. 7 is that expression is to the block diagram of Fig. 1 to the structure of the shake correction topworks that jitter correction device (shake correction mechanism) shown in Figure 3 is controlled.
Fig. 8 has magnetized under the state of magnet and housing having taken out 4 utmost points, and expression comprises the stereographic map of Camera system of the jitter correction device of second embodiment of the invention.
Fig. 9 is the block diagram of the structure of expression shake correction topworks that jitter correction device shown in Figure 8 (shake correction mechanism) is controlled.
Symbol description
10,10A Camera system; 20 camera modules; 28 capturing elements; 30,30A jitter correction device (shake correction mechanism); 32 inside casings; 32a elevation axis bearing axle; 34 centers; 34a elevation axis bearing portion (support holes); 34b rolling bolster; 36 housings; 36a rolling support (support holes); 40 voice coil motors (VCM); 424 utmost points magnet that magnetizes; 44 coil substrates; 44-1～44-4 coil; 44P first direction topworks; 44Y second direction topworks; 46 neutral holding plates (yoke); 50 position detection unit (position transducer); 51,52 Hall elements; 61 first gyro sensors (pitch orientation gyroscope); 62 second gyro sensors (rolling gyroscopic compass); L1, L2, L3 lens; 100 have the mobile phone of camera; 112,112A shake Correction and Control portion; 200, topworks is revised in the 200A shake; 202 pitch orientation gyroscopes; 204 rolling gyroscopic compasss; 212 shakes detect; 214 sequencing circuits; 216 amount of jitter testing circuits; 218 transformation of coefficient circuit; 220,220A control circuit; 222 driving circuits; The O optical axis; The central shaft of C housing; First of P (pitch axis, pitch orientation); Second of Y (axis of roll, rolling direction)
Embodiment
Embodiments of the present invention are described with reference to the accompanying drawings.
Referring to figs. 1 through Fig. 3, the Camera system 10 of the jitter correction device 30 that comprises first embodiment of the invention is described.Fig. 1 is the three-dimensional exploded view of expression Camera system 10.Fig. 2 is the planimetric map of Camera system 10 shown in Figure 1.Fig. 3 is the front cross-sectional view of Camera system 10 shown in Figure 1.
The automatic focus lens driving unit is made of lens movable part and lens drive division.Lens drive division supporting lens movable part slidably on optical axis O direction drives the lens movable part simultaneously.
In the above-described embodiment, form the diaxon fitting portion with concavo-convex cylindrical shape.Be that a pair of elevation axis bearing axle 32a, 32a and a pair of rolling bolster 34b, 34b form protruding cylindrical shape respectively, a pair of pitching is born the 34a of portion's (bearing the hole), 34a and a pair of rolling and is born the 36a of portion's (bearing the hole), 36a and form recessed cylindrical shape respectively.Therefore, might produce some gaps at the diaxon fitting portion.As the countermeasure of this point, also can make cone shape to bolster, portion's of bearing (bearing the hole) is made the shape of alms bowl.
Fig. 4 is the three-dimensional exploded view that is illustrated in the voice coil motor (VCM) 40 that uses in the jitter correction device 30.
Except Fig. 3, also the voice coil motor (VCM) 40 that uses is described in jitter correction device 30 below with reference to Fig. 4.
Voice coil motor (VCM) 40 by 4 utmost points of the bottom that is installed in housing 36 magnetize magnet 42, constitute with this 4 utmost point coil substrate 44 and neutral holding plate (yoke) 46 that magnet 42 is arranged on the inside casing 32 opposite to each other that magnetize.
Magnetize 4 magnetic poles of magnet 42 of 4 utmost points are provided with symmetrically around the central shaft C of housing 36.On coil substrate 44, cross over 4 utmost points and magnetize and disposed first to fourth coil 44-1,44-2,44-3 and the 44-4 as the center balanced configuration between the magnetic pole of magnet 42 with optical axis O.Neutral holding plate (yoke) 46, is installed on the coil substrate 44 with 4 utmost points magnet 42 that magnetizes under the state between first to fourth coil 44-1～44-4 opposite to each other at double team.
Illustrated coil substrate 44 is made of the multilager base plate of many layers.Therefore, formed first to fourth coil 44-1～44-4 in the inside of coil substrate (multilager base plate) 44.On a plurality of layers of coil substrate 44, form the first coil 44-1 and tertiary coil 44-3 with the single line astragal.That is, the first coil 44-1 and tertiary coil 44-3 are connected in series.On the other hand, use the single line astragal, on other different a plurality of layers of the layer with having formed the first coil 44-1 and tertiary coil 44-3 of coil substrate 44, formed the second coil 44-2 and the 4th coil 44-4.That is, the second coil 44-2 and the 4th coil 44-4 are connected in series.
As shown in Figure 4, on pitch orientation P, dispose the first coil 44-1 and tertiary coil 44-3 mutually from optical axis O with leaving.On rolling direction Y, dispose the second coil 44-2 and the 4th coil 44-4 mutually from optical axis O with leaving.The combination of the first coil 44-1 and tertiary coil 44-3 is used for shaking camera module 20 around first (pitch axis) P, so be also referred to as the pitching coil modes.The combination of the second coil 44-2 and the 4th coil 44-4 is used for shaking camera module 20 around second (axis of roll) Y, so be also referred to as the rolling coil modes.
Under the state (during non-energising) that in first to fourth coil 44-1～44-4, does not flow through electric current, can camera module 20 being remained on mode on its neutral position (initial position), neutral holding plate 46 (yoke) is configured in 4 utmost points magnetizes on the forward surface of magnet 42.Therefore, when no power, according to Fig. 2 and Fig. 3 as can be known, optical axis O is consistent with the central shaft C of housing 36.
In addition, can not be subjected to the mode of the influence in magnetic field, 4 utmost points magnet 42 that magnetizes is configured on the bottom surface of housing 36 with the corresponding camera module 20 of automatic focus.
In illustrated embodiment, as magnet 42, use one 4 utmost point magnet that magnetizes, but also can dispose the homopolar magnet of 4 flat boards.
Illustrated jitter correction device 30 also has and is used to detect the position detection unit 50 of inside casing 32 with respect to the position of housing 36.Illustrated position detection unit 50 is made of first and second Hall element 51,52 that is installed on the coil substrate 44.With first Hall element 51 be installed on the coil substrate 44 on the pitch orientation P apart from the optical axis O position far away than tertiary coil 44-3 on.Second Hall element 52 be installed on the coil substrate 44 on the rolling direction Y apart from optical axis O than the 4th coil 44-4 position far away on.First Hall element 51 detects the primary importance of following around first (pitch axis) P of shaking (pitch position) by detecting the magnetize magnetic force of magnet 42 of 4 utmost points.Second Hall element 52 detects the second place of following around second (axis of roll) Y of shaking (roll attitude) by detecting the magnetize magnetic force of magnet 42 of 4 utmost points.
Below with reference to Fig. 5, the action of voice coil motor (VCM) 40 is described.
Fig. 5 (A) extracts 4 utmost points magnetize magnet 42 and the first to fourth coil 44-1～44-4 that forms and the figure of first and second Hall element 51,52 out on coil substrate 44.Fig. 5 (A) is illustrated in the configuration when first to fourth coil 44-1～44-4 not being switched on.Therefore, optical axis O is consistent with the central shaft C of housing 36.That is, camera module 20 places neutral position (initial position).At this moment, first and second Hall element 51,52 does not produce output voltage.
Under this state, shown in Fig. 5 (A), suppose in first and second coil (pitching coil modes) 44-1,44-3 and flow through electric current I.At this moment because 4 utmost points magnetize the magnetic field (magnetic flux) of magnet 42 with flow through the interaction of pitching with the electric current I of coil modes 44-1,44-3, according to Fleming's lefft-hand rule, produce electromagnetic force (thrust) F in coil modes 44-1,44-3 in pitching.As a result, inside casing 32 (camera module 20) shakes around first (pitch axis) P.
Fig. 5 (B) expression is by electromagnetic force (thrust) F of above-mentioned pitching with coil modes 44-1,44-3, the state of skew has taken place in the position of inside casing 32 (camera module 20), by this offset, in neutral holding plate (yoke) 46, the counter-force that the arrow of generation Fig. 5 (B) is represented.
By the counter-force balance of the thrust F of the coil shown in Fig. 5 (A) and generation in neutral holding plate (yoke) 46, keep inside casings 32 (camera module 20) with respect to housing 36.
At this moment, first Hall element 51 is because of primary importance (pitch position) skew of the magnet 42 that magnetizes with respect to 4 utmost points, so produce and the corresponding voltage of this primary importance (pitch position).
Fig. 5 has illustrated the action when flowing through electric current I in first and second coil (pitching coil modes) 44-1,44-3, moves similarly when flowing through electric current I in the second and the 4th coil (rolling coil modes) 44-2,44-4.That is, by 4 utmost points magnetize magnet 42 magnetic field (magnetic flux) with flow through the interaction of rolling with the electric current I of coil modes 44-2,44-4, according to Fleming's lefft-hand rule, produce electromagnetic force (thrust) F in coil modes 44-2,44-4 in rolling.As a result, inside casing 32 (camera module 20) shakes around second (axis of roll) Y.By the counter-force balance of the thrust F of coil and generation in neutral holding plate (yoke) 46, keep inside casings 32 (camera module 20) with respect to housing 36.Second Hall element 52 is because of the second place (roll attitude) skew of the magnet 42 that magnetizes with respect to 4 utmost points, so produce and the corresponding voltage of this second place (roll attitude).
Fig. 6 is the block diagram of structure that expression has the mobile phone 100 of camera, and this camera has been installed Fig. 1 to Camera system 10 shown in Figure 3.
The mobile phone 100 that has camera has all control parts 110.The built-in shake Correction and Control of all control part 110 portion 112.All control parts 110 are connected with timing generator (TG) 122.The signal that capturing element 28 is photographed offers simulation process portion (AFE) 124.Timing generator (TG) 122 provides timing signal to capturing element 28 and simulation process portion (AFE) 124.Signal after simulation process portion (AFE) 124 handles, after carrying out Flame Image Process by image processing part 126, record (preservation) is in video memory 128.Image processing part 126 and video memory 128 are by all control part 110 controls.
On all control parts 110, be connected with display part 130 and image recording portion 132.In addition, all control parts 110 send to focus control portion 134 and focus on command signal.Respond this focusing command signal, focus control portion 134 makes the lens L2 in the camera module 20 move along optical axis.All control parts 110 send shutter control signal to shutter drive division 136.Respond this shutter control signal, shutter drive division 136 drives the shutter (not shown) of Camera system 10.
Fig. 7 is the block diagram of the structure of expression shake correction topworks 200 that jitter correction device (shake correction mechanism) 30 is controlled.
On the casing (not shown) of the mobile phone 100 that has camera, be provided with the pitch orientation gyroscope 202 of the shake that is used to detect pitch orientation (around the shake of pitch axis P) and be used to detect the rolling gyroscopic compass 204 of the shake (around the shake of axis of roll Y) of rolling direction.
Shake Correction and Control portion 112 have according to the first and second angular velocity detection input have camera mobile phone 100 casing shake shake testing circuit 212 and receive the sequencing circuit 214 of shutter operation command signal.Shake testing circuit 212 comprises filtering circuit and amplifying circuit.Shake testing circuit 212 provides the shake detection signal to amount of jitter testing circuit 216.Amount of jitter testing circuit 216 detects the amount of jitter of the casing of the mobile phone 100 have camera according to the shake detection signal, sends the amount of jitter detection signals to transformation of coefficient circuit 218.218 pairs of amount of jitter detection signals of transformation of coefficient circuit carry out transformation of coefficient, the signal after control circuit 220 sends transformation of coefficient.Provide the position detection signal that comes the position detection unit (position transducer) 50 that is provided with in the comfortable jitter correction device (shake correction mechanism) 30 to this control circuit 220.
Signal after the control circuit 220 response coefficient conversion, according to position detection signal output control signal, this control signal is offset by the 212 detected shakes of shake testing circuit.Sequencing circuit 214 response shutter operation command signals, the timing of control amount of jitter testing circuit 216, transformation of coefficient circuit 218 and control circuit 220.Provide control signal to driving circuit 222.
As mentioned above, as voice coil motor 40, jitter correction device (shake correction mechanism) 30 has the pitching coil modes (44-1 that is used for shaking around first (pitch axis) P camera module 20,44-3) and the rolling that is used for shaking camera module 20 around second (axis of roll) Y with coil modes (44-2,44-4).(44-1 44-3) is also referred to as the 44P of first direction topworks, and (44-2 44-4) is also referred to as the 44Y of second direction topworks with coil modes in rolling with coil modes in pitching.In a word, jitter correction device (shake correction mechanism) 30 comprises 44P of first direction topworks and the 44Y of second direction topworks.
Driving circuit 222 responsive control signals drive first direction 44P of topworks and the 44Y of second direction topworks.
By such structure, can shake camera module 20, offset the shake of the casing of the mobile phone 100 that has camera.As a result, can revise shake.
With reference to Fig. 8, the Camera system 10A of the jitter correction device 30A that comprises second embodiment of the invention is described.Fig. 8 is expression with the magnetize stereographic map of the Camera system 10A under the state that magnet 42 and housing 36 take off of 4 utmost points.
Illustrated jitter correction device 30A is except also having first and second gyro sensor 61 and 62, removed first and second Hall element 51,52 simultaneously, have the identical structure of the jitter correction device represented with Fig. 1 to Fig. 3 30.Therefore, to giving identical reference marks to composed component components identical shown in Figure 3, for the purpose of simplifying the description, different places only is described below with Fig. 1.
Inside casing 32 has outer wall, this outer wall have with the first side 32-1 of first (pitch axis) P quadrature and with the second side 32-2 of second (axis of roll) Y quadrature.First gyro sensor 61 is installed on the first side 32-1 of outer wall of inside casing 32, and second gyro sensor 62 is installed on the second side 32-2 of outer wall of inside casing 32.First gyro sensor 61 moves as first angular-rate sensor that detects the rotational angular velocity that centers on first (pitch axis) P, and second gyro sensor 62 moves as second angular-rate sensor of detection around the rotational angular velocity of second (axis of roll) Y.In other words, first gyro sensor 61 moves as detecting the first shake sensor of inside casing 32 around the shake of first (pitch axis) P, and second gyro sensor 62 moves as detecting the second shake sensor of inside casing 32 around the shake of second (axis of roll) Y.
Therefore, first gyro sensor 61 is also referred to as the pitch orientation gyroscope, and second gyro sensor 62 is also referred to as the rolling gyroscopic compass.
In shake correction circuit 30A shown in Figure 8, first gyro sensor 61 is installed on the first side 32-1 of outer wall of inside casing 32, and second gyro sensor 62 is installed on the second side 32-2 of outer wall of inside casing 32, but also can install on the contrary.That is, first gyro sensor 61 can be installed on the second side 32-2 of outer wall of inside casing 32, and second gyro sensor 62 can be installed on the first side 32-1 of outer wall of inside casing 32.
Fig. 9 is the block diagram of the structure of expression the shake correction 200A of topworks that jitter correction device shown in Figure 8 (shake correction mechanism) 30A is controlled.
In shake correction topworks 200 shown in Figure 7, pitch orientation gyroscope 202 and rolling gyroscopic compass 204 are installed on the casing of the mobile phone 100 that has camera, but in the shake correction 200A of topworks shown in Figure 9, first gyro sensor (pitch orientation gyroscope), 61 and second gyro sensor (rolling gyroscopic compass) 62 is directly installed on jitter correction device (shake correction mechanism) 30A.
In addition, have position transducer (Hall element) 50 with respect to jitter correction device shown in Figure 7 (shake correction mechanism) 30, jitter correction device shown in Figure 9 (shake correction mechanism) 30A does not have such position transducer (Hall element) 50.
The shake correction 200A of topworks shown in Figure 9 states such difference except following the chatting face to face of structure (action) of shake Correction and Control portion, has the structure identical with shake correction topworks shown in Figure 7 200.Therefore, the reference marks of giving 112A to shake Correction and Control portion.
The shake Correction and Control 112A of portion except the action of control circuit with shown in Figure 7 different, have the structure identical with shake Correction and Control portion shown in Figure 7 112.Therefore, control circuit is given the reference marks of 220A.
Signal behind the transformation of coefficient that control circuit 220A response provides from transformation of coefficient circuit 218, output makes the output of pitch orientation gyroscope 61 and rolling gyroscopic compass 62 become minimum feedback control signal.Respond this feedback control signal, driving circuit 222 drives first direction 44P of topworks and the 44Y of second direction topworks.
By such structure, can shake camera module 20, offset the shake of inside casing 32 of the lens mechanism 10A of the mobile phone 100 have camera.As a result, can revise shake.
As mentioned above, in jitter correction device of the present invention,, then can both revise its shake as long as camera module 20 is standardized camera modules.
More than by preferred implementation the present invention has been described, but in the scope that does not break away from spirit of the present invention, those skilled in the art can realize various distortion.For example, in the above-described embodiment, the coil substrate that voice coil motor is magnetized magnet and is arranged on inside casing by 4 utmost points that are arranged on housing constitutes, but the present invention is not limited to the voice coil motor of this spline structure.For example, voice coil motor also can be made of the coil substrate that magnetizes magnet at 4 utmost points that are provided with on the inside casing and be provided with on housing.In addition, in the above-described first embodiment,, used Hall element, but also can use other position detection unit (position transducer) as position detection unit (position transducer).And, in the above-described 2nd embodiment,, use gyro sensor constant angular velocity sensor, but also can use other shake sensor as the shake sensor.By the outside conductive shield box is installed, also can be realized the EMC countermeasure at Camera system.
Claims (7)
1. jitter correction device, its by make the camera module that keeps lens and capturing element around and light shaft positive cross, and first and second of crossing one another shake and revise shake, it is characterized in that,
Have: at the inside casing of internal fixation camera module;
Joltily support the center of this inside casing around described first freedom from the inside casing outside;
Joltily support the housing of center around second freedom from the described center outside; And
Be provided with in the bottom of the bottom of described inside casing and described housing, drive and make described inside casing and described center respectively around described first and described second voice coil motor that shakes.
2. jitter correction device according to claim 1 is characterized in that,
Described voice coil motor has: 4 utmost points magnet that magnetizes, and it is installed in the bottom of described housing, around the central shaft rotation of described housing 4 magnetic poles is set symmetrically;
Coil substrate is arranged on the bottom of described inside casing opposite to each other with described 4 utmost points magnet that magnetizes, and crosses over described 4 utmost points ground that magnetizes between the adjacent magnetic pole of magnet, and being configured to described optical axis is 4 coils of center balanced configuration; And
Neutral holding plate, it, is installed on the described coil substrate with described 4 utmost points magnet that magnetizes under the state between described 4 coils opposite to each other at double team.
3. jitter correction device according to claim 2 is characterized in that,
Have and be used to detect the position detection unit of described inside casing with respect to the position of described housing.
4. jitter correction device according to claim 3 is characterized in that,
Described position detection unit has: be installed on the described coil substrate, detect first Hall element follow around described first primary importance of shaking by detecting the magnetize magnetic force of magnet of described 4 utmost points; And
Be installed on the described coil substrate, detect second Hall element of following around described second second place of shaking by detecting the magnetize magnetic force of magnet of described 4 utmost points.
5. according to claim 1 or 2 described jitter correction devices, it is characterized in that,
Described housing is fixed on the casing,
Described inside casing has outer wall, and this outer wall has respectively first and second side with described first and second quadrature,
Also have on a side of described first side of the outer wall of described inside casing and described second side, install, detect the first shake sensor of described inside casing around described first shake; And
On the opposing party of described first side of the outer wall of described inside casing and described second side, install, detect the second shake sensor of described inside casing around described second shake.
6. jitter correction device according to claim 5 is characterized in that,
The described first shake sensor is made of first angular-rate sensor that detects around described first rotational angular velocity,
The described second shake sensor is made of second angular-rate sensor that detects around described second rotational angular velocity.
7. jitter correction device according to claim 6 is characterized in that,
Described first angular-rate sensor is made of first gyro sensor,
Described second angular-rate sensor is made of second gyro sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110437648.1A CN102436118B (en) | 2008-09-25 | 2009-09-24 | Lens driver and camera |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-246410 | 2008-09-25 | ||
| JP2008246410A JP4626780B2 (en) | 2008-09-25 | 2008-09-25 | Camera shake correction device |
| JP2008246410 | 2008-09-25 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110437648.1A Division CN102436118B (en) | 2008-09-25 | 2009-09-24 | Lens driver and camera |
Publications (2)
| Publication Number | Publication Date |
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| CN101685235A true CN101685235A (en) | 2010-03-31 |
| CN101685235B CN101685235B (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110437648.1A Active CN102436118B (en) | 2008-09-25 | 2009-09-24 | Lens driver and camera |
| CN2009101776108A Active CN101685235B (en) | 2008-09-25 | 2009-09-24 | Jitter correction device of camera |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110437648.1A Active CN102436118B (en) | 2008-09-25 | 2009-09-24 | Lens driver and camera |
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| Country | Link |
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| JP (1) | JP4626780B2 (en) |
| KR (1) | KR101031857B1 (en) |
| CN (2) | CN102436118B (en) |
| TW (3) | TWI414815B (en) |
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| CN112986238B (en) * | 2021-01-31 | 2022-12-02 | 荣旗工业科技(苏州)股份有限公司 | Visual detection system and method with camera core anti-shake compensation structure |
| CN112986238A (en) * | 2021-01-31 | 2021-06-18 | 荣旗工业科技(苏州)股份有限公司 | Visual detection system and method with camera core anti-shake compensation structure |
| CN113589543B (en) * | 2021-08-13 | 2023-09-26 | 新思考电机有限公司 | Anti-shake system, movable structure, lens driving device, image pickup device, and electronic apparatus |
| CN113589543A (en) * | 2021-08-13 | 2021-11-02 | 新思考电机有限公司 | Anti-shake system, movable structure, lens drive, image pickup apparatus, and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101685235B (en) | 2012-01-04 |
| TWI414815B (en) | 2013-11-11 |
| TW201344239A (en) | 2013-11-01 |
| CN102436118B (en) | 2015-09-02 |
| TWI592695B (en) | 2017-07-21 |
| TWI494592B (en) | 2015-08-01 |
| KR101031857B1 (en) | 2011-05-02 |
| KR20100035097A (en) | 2010-04-02 |
| CN102436118A (en) | 2012-05-02 |
| JP4626780B2 (en) | 2011-02-09 |
| JP2010078842A (en) | 2010-04-08 |
| TW201534961A (en) | 2015-09-16 |
| TW201015108A (en) | 2010-04-16 |
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