WO2014076958A1 - カメラ駆動装置 - Google Patents
カメラ駆動装置 Download PDFInfo
- Publication number
- WO2014076958A1 WO2014076958A1 PCT/JP2013/006707 JP2013006707W WO2014076958A1 WO 2014076958 A1 WO2014076958 A1 WO 2014076958A1 JP 2013006707 W JP2013006707 W JP 2013006707W WO 2014076958 A1 WO2014076958 A1 WO 2014076958A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- unit
- drive
- camera
- panning
- tilting
- Prior art date
Links
- 238000004091 panning Methods 0.000 claims abstract description 280
- 230000003287 optical effect Effects 0.000 claims abstract description 179
- 238000005096 rolling process Methods 0.000 claims abstract description 138
- 238000001514 detection method Methods 0.000 claims abstract description 76
- 238000003384 imaging method Methods 0.000 claims description 67
- 238000012545 processing Methods 0.000 claims description 39
- 230000002265 prevention Effects 0.000 claims description 29
- 230000008859 change Effects 0.000 claims description 17
- 230000005484 gravity Effects 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 11
- 229920005989 resin Polymers 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 5
- 238000012937 correction Methods 0.000 description 49
- 230000001105 regulatory effect Effects 0.000 description 13
- 238000004804 winding Methods 0.000 description 11
- 230000009467 reduction Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 4
- 239000000088 plastic resin Substances 0.000 description 4
- 238000013519 translation Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011553 magnetic fluid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/681—Motion detection
- H04N23/6815—Motion detection by distinguishing pan or tilt from motion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
- F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/0266—Field-of-view determination; Aiming or pointing of a photometer; Adjusting alignment; Encoding angular position; Size of the measurement area; Position tracking; Photodetection involving different fields of view for a single detector
-
- 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
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/682—Vibration or motion blur correction
- H04N23/685—Vibration or motion blur correction performed by mechanical compensation
- H04N23/687—Vibration or motion blur correction performed by mechanical compensation by shifting the lens or sensor position
-
- G—PHYSICS
- 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
-
- 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
- G03B2205/0007—Movement of one or more optical elements for control of motion blur
- G03B2205/0023—Movement of one or more optical elements for control of motion blur by tilting or inclining one or more optical elements with respect to the optical axis
-
- 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
Definitions
- a camera unit including a lens and an image sensor is tilted in a panning (yawing) direction and a tilting (pitching) direction, and rotated (rolled) around the optical axis of the lens.
- the present invention relates to a camera driving device capable of moving a certain image sensor two-dimensionally in a plane perpendicular to the optical axis and rotating it around the optical axis.
- a camera shake correction device that corrects image shake of a captured image due to camera shake.
- a lens, a lens barrel, a reflection mirror, an image sensor, or the like is tilted with respect to the optical axis of the camera or moved two-dimensionally on a plane orthogonal to the optical axis.
- Patent Document 1 discloses a shake correction mechanism having a structure in which a lens barrel is elastically supported at one point and the lens barrel is inclined with respect to the optical axis.
- Patent Document 2 discloses a camera shake correction device that supports a mirror in a pivot configuration and tilts the mirror with respect to the optical axis.
- Patent Document 3 discloses an imaging lens unit that supports a spherical lens barrel at three points, and moves and tilts the lens barrel along the optical axis.
- camera shake correction may not be sufficient, and it is required to control the camera unit with a greater degree of freedom.
- One non-limiting embodiment of the present application provides a camera driving device that can perform camera shake correction and can control the camera unit with a large degree of freedom.
- a camera driving apparatus includes an imaging element having an imaging surface, an optical axis, a lens that forms a subject image on the imaging surface, and a lens barrel that holds the lens.
- a movable unit having at least one attracting magnet and including the camera unit, wherein the movable unit has a first convex partial spherical surface, at least one magnetic body, and the movable unit. At least a part of the unit has a concave part, and the first convex partial spherical surface of the movable unit and the concave part are formed by a magnetic attraction force of the at least one attracting magnet to the at least one magnetic body.
- a panning drive unit that tilts the camera unit in a panning direction, a tilting drive unit that tilts the camera unit in a tilting direction perpendicular to the panning direction with respect to the fixed unit, and the camera unit with respect to the fixed unit A rolling drive unit that rotates the lens in a rolling direction about the optical axis of the lens, and a panning rotation axis direction that is a rotation axis of the panning direction and a tilting direction of the imaging element with respect to the movable unit.
- An image sensor driving unit that moves in a direction of a tilting rotation axis that is a rotation axis; a first detector that detects an inclination angle of the camera unit with respect to the fixed unit in the panning direction and the tilting direction; A second detector for detecting a rotation angle of the camera unit rotating in a rolling direction; And a third detector for detecting a moving amount of the imaging element that moves in the direction of direction and the tilting axis of rotation of the panning rotation axis.
- a panning drive unit that tilts the camera unit in the panning direction with respect to the fixed unit, and a chill that tilts the camera unit with respect to the fixed unit in a tilting direction orthogonal to the panning direction.
- An imaging device that is a part of the camera unit with respect to the movable unit, and a rolling drive unit that rotates the camera unit with respect to the fixed unit in a rolling direction around the optical axis of the lens.
- the movable unit is provided with an image sensor driving unit that moves two-dimensionally in a plane perpendicular to the plane, in addition to the three-axis shake correction control of the movable unit, the two-dimensional position of the image sensor perpendicular to the optical axis direction Correction control can be realized.
- shake correction in the translation direction of the camera which has been difficult to realize by shake correction by rotation drive, can be performed in pixel units by image pickup device drive.
- FIG. 1 It is a disassembled perspective view which shows schematic structure of the camera drive device 165 by 1 aspect of this invention. It is a disassembled perspective view which shows the detailed structure of the movable unit 180 by the 1st Embodiment of this invention. It is the perspective view seen from the upper direction of the camera drive device 165 by 1 aspect of this invention. It is the perspective view which excluded the drop-off prevention member 201 seen from the upper direction of the camera drive device 165 by 1 aspect of this invention. It is the perspective view seen from the upper direction of the different angle of the camera drive device 165 by 1 aspect of this invention. It is the perspective view which excluded the drop-off prevention member 201 seen from the upper side of a different angle of the camera driving device 165 according to one aspect of the present invention.
- FIG. 6 is a perspective view of a drop-off prevention member 201 viewed from above the camera driving device 165 according to an aspect of the present invention. It is the top view seen from the optical axis 10 direction of the lens 105 mounted in the movable unit 180 of the camera drive device 165 by 1 aspect of this invention.
- FIG. 10 is a plan view of the camera driving device 165 according to one aspect of the present invention viewed from the direction of a straight line 13; It is the perspective view of the movable unit 180 and drive part which excluded the image pick-up element drive part 99, the lens part 101, the camera cover 150, and the base 200 seen from the upper direction of the camera drive device 165 by 1 aspect of this invention.
- FIG. 1 It is the perspective view of the fixed unit 300 seen from the upper direction of the camera drive device 165 by 1 aspect of this invention. It is a disassembled perspective view which shows schematic structure of the fixing unit 300 of the camera drive device 165 by 1 aspect of this invention. It is a top view of the camera drive device 165 by the 1st Embodiment of this invention. It is sectional drawing of the camera drive device 165 by the 1st Embodiment of this invention in the plane containing the optical axis 10 and the panning direction rotating shaft 12. FIG. It is a top view of the camera drive device 165 by the 1st Embodiment of this invention.
- FIG. 1 It is sectional drawing of the camera drive device 165 by the 1st Embodiment of this invention in the plane containing the optical axis 10 and the tilting direction rotating shaft 11.
- FIG. 2 is a cross-sectional view of the camera driving device 165 according to the first embodiment of the present invention on a plane including the optical axis 10 and the straight line 14.
- FIG. It is the perspective view which looked at the component of the image sensor drive part 99 by the 1st Embodiment of this invention from upper direction. It is the perspective view which looked at the component of the image sensor drive part 99 by the 1st Embodiment of this invention from the downward direction.
- FIG. 6 is a perspective view of the movable unit 180 as viewed from above in a state where the movable unit 180 is inclined at the same angle in the panning direction 20 and the tilting direction 21 by a combined angle ⁇ xy.
- FIG. 5 is a top view of the movable unit 180 in a state where the movable unit 180 is inclined at the same angle in the panning direction 20 and the tilting direction 21 by a combined angle ⁇ xy.
- FIG. 6 is a perspective view of the movable unit 180 as viewed from above in a state where the movable unit 180 is inclined at the same angle in the panning direction 20 and the tilting direction 21 by a combined angle ⁇ xy.
- FIG. 6 is a cross-sectional view on a plane including the optical axis 10 and a straight line 14 in a state where the movable unit 180 is inclined at the same angle in the panning direction 20 and the tilting direction 21 by the combined angle ⁇ xy. It is the perspective view which looked at the 2nd magnetic sensor 700, panning drive magnet 401, and tilting drive magnet 402 which were provided in the fixed unit of camera drive device 165 by one mode of the present invention from the upper part. It is a top view of the 2nd magnetic sensor 700, panning drive magnet 401, and tilting drive magnet 402 which were provided in the fixed unit of camera drive device 165 by one mode of the present invention.
- FIG. It is a disassembled perspective view which shows the positional relationship of the fixed unit of the camera drive device 165 and the support ball
- FIG. 6 is an upper surface of a fixed unit of the camera driving device 165 according to an aspect of the present invention. It is sectional drawing in the plane containing the optical axis 10 and the center of the support ball
- FIG. 1 It is sectional drawing of the camera drive device 165 in the plane containing the optical axis 10 and the straight line 14 by the 2nd Embodiment of this invention. It is the perspective view which looked at the component of the image sensor drive part 99 by the 2nd Embodiment of this invention from the upper direction. It is the perspective view which looked at the component of the image sensor drive part 99 by the 2nd Embodiment of this invention from the downward direction. It is the other perspective view which looked at the component of the image sensor drive part 99 by the 2nd Embodiment of this invention from the downward direction.
- FIG. 1 It is sectional drawing of the camera drive device 165 in the plane containing the optical axis 10 and the straight line 14 by the 2nd Embodiment of this invention. It is the perspective view which looked at the component of the image sensor drive part 99 by the 2nd Embodiment of this invention from the upper direction. It is the perspective view which looked at the component of the image sensor drive part 99 by the 2nd Embodiment of this invention from the downward direction.
- FIG. 10 is a top view of the camera driving device 165 in a state where the movable unit 180 is inclined at the same angle in the panning direction 20 and the tilting direction 21 by a combined angle ⁇ xy according to the second embodiment of the present invention.
- FIG. 6 is a cross-sectional view on a plane including the optical axis 10 and the straight line 14 in a state where the movable unit 180 is inclined at the same angle in the panning direction 20 and the tilting direction 21 by the combined angle ⁇ xy according to the second embodiment of the present invention. is there.
- It is a perspective view which shows arrangement
- the inventor of the present application examined in detail a conventional camera capable of performing camera shake correction.
- the camera shake angle that occurs when a person takes a still image is about ⁇ 0.3 degrees, and the generated frequency component is about 20 to 30 Hz.
- the camera shake correction control needs to be performed in a frequency band of about 10 Hz.
- a conventional camera drive device that corrects image shake of a captured image due to camera shake at rest uses each part (lens, lens barrel, reflection mirror, imaging device, etc.) constituting the camera drive device as the optical axis of the lens. In spite of the slight inclination angle and the amount of movement that linearly moves two-dimensionally on a plane orthogonal to the optical axis, good camera shake correction has been realized.
- Walk shake includes hand shake
- it is ⁇ 10 degrees or more, and it is said that it is necessary to perform control in a frequency band of about 50 Hz in order to correct walking shake.
- the conventional camera driving device has problems in the configuration of the support system that supports the constituent elements and the driving system that drives the constituent elements.
- the apparatus of Patent Document 1 is suitable for tilting a lens barrel at a minute angle, but when tilting the lens barrel at a large angle exceeding ⁇ 10 degrees, it supports an elastic body. Is considered to be deformed to the plastic region. As the angle of inclination increases, the load due to the spring constant of the elastic body becomes very large, and the amplitude increase coefficient (Q value) of the natural vibration due to the elastic body also increases. As a result, it is considered that the phase characteristics and gain characteristics of the correction control are deteriorated and it is difficult to perform the correction control in the frequency band described above.
- Patent Document 2 drives a reflecting mirror to correct image shake.
- a video camera or a digital camera has a wide-angle lens system
- the reflection mirror becomes a large component in the optical system.
- the reflecting mirror is an appropriate solution for video cameras and digital cameras that are desired to be miniaturized.
- the mirror since the mirror is pivotally supported by a magnetic attraction force, the mirror may fall off due to disturbance such as vibration or impact.
- the lens holder can be inclined at a large angle.
- the rotation radius of the portion where the lens holder and the holder provided on the outside thereof are in contact with each other is large, the frictional load on the movable unit is increased and the movement distance is increased.
- the inclination angle increases, the variation of the contact friction load increases, and it is considered that accurate control is difficult.
- the distance between the lens holder and the holder provided outside is not accurately controlled, it is difficult to accurately control the inclination angle of the lens holder.
- mechanical backlash may occur, which may hinder the frequency response characteristics of the movable unit.
- the devices of Patent Documents 1 to 3 do not have a structure for rotating a component such as a lens around the optical axis of the camera unit. Therefore, it is difficult to control a large rotation angle with high accuracy around the optical axis of the camera unit.
- the first embodiment of the present invention in view of such a problem of the prior art, is an imaging that is a part of the camera unit in order to add a means for rotating the camera unit in the triaxial direction and a new function that has not existed in the past.
- a camera drive device that is movable in a total of five axes including a device that moves an element in two axes in a plane perpendicular to the optical axis.
- the second embodiment of the present invention is a part of the camera unit in order to add a means for rotating the camera unit in the three-axis direction and a new function that has not existed before.
- a camera drive device that can move in a total of six axes including a means for moving a certain imaging device in two axes on a plane perpendicular to the optical axis and rotating about the optical axis.
- a camera driving device includes an imaging element having an imaging surface, a camera unit including an optical axis, a lens that forms a subject image on the imaging surface, and a lens barrel that holds the lens;
- a movable unit having at least one attracting magnet and incorporating the camera unit, the movable unit having a first convex partial spherical surface as an outer shape, at least one magnetic body, and at least a part of the movable unit Has a concave portion in which the first convex portion spherical surface and the concave portion of the movable unit are in point contact or line contact by a magnetic attraction force of the at least one attracting magnet to the at least one magnetic body.
- a movable unit that freely rotates about the spherical center of the first convex partial spherical surface, and the camera unit is panned relative to the stationary unit.
- a panning drive unit that tilts in a direction
- a tilting drive unit that tilts the camera unit in a tilting direction perpendicular to the panning direction with respect to the fixed unit
- the camera unit that moves the camera unit with respect to the fixed unit.
- a rolling drive unit that rotates in a rolling direction about the optical axis, and a panning rotation axis direction that is a rotation axis in the panning direction and a rotation axis in the tilting direction with respect to the movable unit.
- An image sensor driving unit that moves in the direction of the tilting rotation axis, a first detector that detects an inclination angle of the camera unit with respect to the fixed unit in the panning direction and the tilting direction, and rotation in the rolling direction
- a second detector for detecting a rotation angle of the camera unit, and the panning rotation
- a third detector for detecting a moving amount of the imaging element that moves in the direction of the direction the tilting axis of rotation.
- an imaging device having an imaging surface, a camera unit including an optical axis, a lens that forms a subject image on the imaging surface, and a lens barrel that holds the lens, and at least one attracting magnet
- a movable unit having a built-in camera unit, the movable unit having a first convex partial spherical surface as an outer shape, and at least one magnetic body and a recess in which at least a part of the movable unit is loosely fitted.
- the movable unit is A fixed unit that freely rotates around the spherical center of the first convex partial spherical surface, and the camera unit is inclined in the panning direction with respect to the fixed unit.
- a tilting drive unit that tilts the camera unit in a tilting direction perpendicular to the panning direction with respect to the fixed unit; and the optical axis of the lens with respect to the fixed unit.
- a rolling drive unit that rotates in a rolling direction as a center, and a direction of a panning rotation axis that is a rotation axis in the panning direction and a tilting rotation axis that is a rotation axis in the tilting direction with respect to the movable unit
- An image sensor driving unit that moves in a rolling direction around the optical axis and a tilt angle of the camera unit relative to the fixed unit in the panning direction and the tilting direction is detected. And a rotation angle of the camera unit rotating in the rolling direction is detected.
- it includes a second detector, and a third detector for detecting a moving amount of the imaging element that moves in the direction of the direction of the panning rotation axis the tilting axis of rotation.
- the fixed unit has at least three second convex partial spherical surfaces located in the concave portion, and the second convex partial spherical surface and the first convex partial spherical surface of the movable unit. And point contact.
- the fixed unit has a concave conical surface constituting an inner surface of the concave portion, and the conical surface and the first convex partial spherical surface of the movable unit are in line contact.
- the camera drive device further includes a drop-off prevention member provided on the fixed unit, the drop-preventing member having a restriction surface that restricts movement of the movable unit so that the movable unit does not drop off the fixed unit.
- the surface has a concave partial spherical surface having a center coinciding with the spherical center of the first convex partial spherical surface.
- the panning drive unit is disposed in the movable unit, the pair of panning drive magnets disposed symmetrically with respect to the optical axis, and the fixed unit so as to face the pair of panning drive magnets.
- the pair of tilting drive magnets and the pair of tilting drive coils are arranged on a straight line passing through the spherical center of the first convex partial spherical surface. Provided on another straight line passing through the
- the rolling drive unit includes four rolling drive coils wound around the pair of panning magnetic yokes and the pair of tilting magnetic yokes, respectively, and the pair of panning drive magnets and the pair of panning drive magnets.
- a tilting drive magnet is used as a rolling drive magnet.
- the at least one magnetic body is the pair of panning magnetic yokes and the pair of tilting magnetic yokes.
- the attraction magnet is the pair of panning drive magnets and the pair of tilting drive magnets.
- a straight line that is perpendicular to the winding center axis of each of the pair of panning drive coils and the pair of tilting drive coils and passes through the spherical center of the first convex partial spherical surface and each drive coil.
- the tilting drive magnet is disposed on the movable unit so as to be opposed to the one panning drive coil and the pair of tilting drive coils.
- a straight line that is perpendicular to the winding center axis of each of the pair of rolling drive coils and that passes through the spherical center of the first convex partial spherical surface is perpendicular to the optical axis and the first An inclination angle B of 45 degrees or less with respect to the spherical surface of the convex part spherical surface and the horizontal plane passing through the center of each rolling drive coil
- the rolling drive unit includes a pair of rolling drive magnets, The pair of rolling drive magnets are disposed on the movable unit so as to face the rolling drive coil.
- the inclination angle A and the inclination angle B are 20 degrees.
- a straight line that connects each spherical center of the second convex partial spherical surface and the spherical center of the first convex partial spherical surface is perpendicular to the optical axis and the first convex
- An inclination angle C of 45 degrees is formed with respect to a horizontal plane passing through the spherical surface of the partial spherical surface.
- the pair of panning drive magnets, the pair of tilting drive magnets, and the pair of rolling drive magnets are located inside the movable unit and exposed at the first convex partial spherical surface. Not.
- the pair of panning drive coils, the pair of tilting drive coils, and the pair of rolling drive coils are provided inside the fixed unit and are not exposed in the recess.
- the movable unit is made of a resin material.
- the movable unit is integrally formed with the pair of panning drive magnets, the pair of tilting drive magnets, and the pair of rolling drive magnets.
- the fixing unit is made of a resin material.
- the fixed unit includes the pair of panning drive coils, the pair of tilting drive coils, the pair of rolling drive coils, the pair of panning magnetic yokes, the pair of tilting magnetic yokes, and a pair of rolling. It is integrally molded with the magnetic yoke.
- the first detection unit includes a first magnetic sensor fixed to the fixed unit, and a tilt detection magnet provided in the movable unit, and the first magnetic sensor includes: A magnetic force change due to the inclination of the inclination detection magnet is detected, and a two-dimensional inclination angle of the camera unit in the panning direction and the tilting direction is calculated.
- the first magnetic sensor and the tilt detection magnet are located on the optical axis.
- the first detection unit includes a light sensor fixed to the fixed unit and a light detection pattern provided on a part of the first convex portion spherical surface of the movable unit,
- the optical sensor detects a change in light incident on the optical sensor due to an inclination of the light detection pattern, and calculates a two-dimensional inclination angle of the camera unit in the panning direction and the tilting direction.
- the photosensor and the photodetection pattern are located on the optical axis.
- the camera drive unit supports an image sensor holder unit on which the image sensor is mounted, and supports the image sensor holder unit movably with respect to the movable unit in a plane perpendicular to the optical axis.
- the camera drive unit supports an image sensor holder unit on which the image sensor is mounted, and supports the image sensor holder unit movably with respect to the movable unit in a plane perpendicular to the optical axis.
- a first imaging element driving coil having a winding center axis parallel to the optical axis and fixed to the imaging element holder portion, and the movable so as to face the first imaging element driving coil
- a second imaging element driving magnet fixed to the movable unit so as to face the two imaging element driving coils.
- the imaging element drive magnet is the tilt detection magnet.
- the first image sensor driving magnet is the tilt detection magnet.
- the second image sensor driving magnet is the panning driving magnet or the tilting driving magnet.
- the support means includes a first plane part provided in the imaging element holder part and having a plane perpendicular to the optical axis, and a plane perpendicular to the optical axis provided in the movable unit. And at least three support spheres sandwiched between the first plane portion and the second plane portion.
- the imaging element holder portion includes a magnetic body, and the support sphere is held by a magnetic attractive force between the magnetic body and the imaging element driving magnet.
- the imaging element holder portion includes a magnetic body, and the support sphere is held by a magnetic attraction between the magnetic body and the first imaging element driving magnet.
- the center of gravity of the movable unit coincides with the spherical center of the first convex partial spherical surface.
- the camera drive device further includes a wiring connected to the camera unit and configured by a flexible cable, and the wiring is arranged in line symmetry with respect to the optical axis, In a vertical plane, the movable unit is fixed to the movable unit in a direction forming 45 degrees with respect to a line connecting the pair of tilting drive magnets or a line connecting the pair of panning drive magnets.
- the second detector includes a second magnetic sensor fixed to the fixed unit, and a rotation detection magnet provided in the movable unit, and the second magnetic sensor includes: A magnetic force change due to rotation of the rotation detection magnet is detected, and a rotation angle of the camera unit in the rolling direction is calculated.
- the rotation detection magnet is a panning drive magnet or a tilting drive magnet.
- the third detector includes a third magnetic sensor fixed to the imaging element holder portion, and a movement detection magnet provided in the movable unit, and the third magnetic sensor Detects a change in magnetic force due to the movement of the image sensor holder unit, and calculates the amount of movement of the image sensor drive unit in the direction of the panning rotation axis and the direction of the tilting rotation axis.
- a gap is provided between the restriction surface of the drop-off preventing member and the first convex partial spherical surface of the movable unit, and the first convex partial spherical surface of the movable unit is The gap is determined so as to return to a point or line contact state by the magnetic attraction force even if the fixing unit is separated from the concave portion.
- a camera unit is based on the camera driving device defined in any one of the above, an angular velocity sensor that detects angular velocities around three orthogonal axes of the fixed unit, and an output from the angular velocity sensor.
- An arithmetic processing unit that generates a target rotation angle signal, and a drive circuit that generates a signal for driving the first drive unit and the second drive unit based on the target rotation angle signal.
- the panning drive unit that tilts the camera unit in the panning direction with respect to the fixed unit, and the camera unit is tilted with respect to the fixed unit in the tilting direction orthogonal to the panning direction.
- shake correction in the translation direction of the camera which has been difficult to realize by shake correction by rotation drive, can be performed in pixel units by image pickup device drive.
- a panning drive unit that tilts the camera unit in the panning direction with respect to the fixed unit
- a tilting drive unit that tilts the camera unit in the tilting direction perpendicular to the panning direction with respect to the fixed unit
- the fixed unit A rolling drive unit that rotates the camera unit in a rolling direction centered on the optical axis of the lens, and an image sensor that is a part of the camera unit with respect to the movable unit is moved two-dimensionally in a plane perpendicular to the optical axis direction.
- the two-dimensional image sensor that is perpendicular to the optical axis direction is provided in the movable unit. Correction control of the position and the rotation angle of the optical axis center can be realized. Thereby, shake correction and rotation correction in the translation direction of the camera, which has been difficult to realize by shake correction by rotation drive, can be performed in pixel units by image pickup device drive.
- the movable unit having the attracting magnet and the first convex partial spherical surface, and the magnetic body and the concave portion into which at least a part of the movable unit is loosely fitted are movable by the magnetic attraction force of the attracting magnet to the magnetic body. Since the unit is provided with a fixed unit that makes point or line contact, the movable unit can be freely rotated with respect to the fixed unit around the spherical center of the first convex partial spherical surface.
- the load caused by the contact can be made constant regardless of the rotation state of the movable unit.
- the following effects can be further obtained. Specifically, by providing a drop-off preventing member, even if the movable unit receives an external impact, the convex unit spherical surface can be returned to a state in which it comes into contact with the concave portion without dropping off the movable unit.
- the frictional load fluctuations with respect to the rotational angle can be achieved by adding a constant normal force due to the magnetic attractive force that does not affect the rotational angle. And a favorable phase / gain characteristic can be realized in the control frequency region.
- the drop-off prevention regulating surface on the drop-off prevention member fixed to the fixed unit the work when the movable unit is assembled into the fixed unit can be facilitated, and the assembly can be greatly improved.
- the drive unit in the panning and tilting directions is fixed to the movable unit, and is a fixed unit so as to face the drive magnets, and two pairs of drive magnets arranged orthogonally to each other around the optical axis. And two pairs of drive coils provided respectively.
- the driving unit in the rolling direction is a pair of driving magnets fixed to the movable unit and arranged circumferentially around the optical axis, and a pair of driving units provided in the fixed unit so as to face the driving magnets. Including a coil.
- a substantially ring-shaped gap formed between the convex partial spherical surface of the movable unit and the drop-off prevention regulating surface of the fixed unit is filled with a vibration-damping viscous member or magnetic fluid to provide the movable unit.
- the amplitude enhancement coefficient (Q value) due to the magnetic spring effect of the magnetic attractive force generated between the drive magnet provided and the magnetic yoke provided in the fixed unit and the Q value of mechanical natural vibration can be reduced, and good control is achieved. Characteristics can be obtained.
- the tilt detection means of the movable unit includes a tilt detection magnet on the optical axis at the bottom of the movable unit and a first magnetic sensor provided in the fixed unit so as to face the tilt detection magnet. It is possible to reduce the size of the apparatus by detecting the change in magnetic force of the tilt detection magnet due to the tilt of the movable unit and calculating the tilt angle.
- the rotation detection means is disposed at an angle of 45 degrees with respect to the panning drive unit and the tilting drive unit as viewed from the direction of the optical axis, and a plurality of drive units are provided on the circumference around the optical axis.
- the panning and tilting drive magnets are used in combination as the rolling drive magnet, and the rolling drive coil is panned and tilted so as to be orthogonal to the coil winding direction of the panning and tilting drive coils.
- the tilt detection magnet mounted on the movable unit is used in combination as an image sensor driving magnet that performs two-dimensional driving on a plane perpendicular to the optical axis, thereby saving space and reducing the size of the device. And reduction of parts count.
- the tilt detection magnet mounted on the movable unit can be used as a first image sensor driving magnet that performs two-dimensional driving on a plane perpendicular to the optical axis.
- the panning driving magnet and the tilting driving magnet can be used as a second image sensor driving magnet that performs rotational driving about the optical axis.
- a panning drive coil, a tilting drive coil, and a rolling drive coil fixed to the fixed unit, and a panning drive magnet, a tilting drive magnet, and a rolling drive magnet mounted on the movable unit facing each other are arranged on the optical axis.
- the apparatus can be reduced in height by being configured at a height position (30 to 45 degrees) that is inclined downward (30 to 45 degrees) perpendicular to the horizontal plane including the spherical center of the convex partial spherical surface of the movable unit.
- the magnetic attractive force generated between the movable unit and the fixed unit can be obtained by being distributed among the plurality of drive magnets and the plurality of magnetic yokes in the panning drive unit, tilting drive unit and rolling drive unit.
- the frictional resistance due to the vertical drag between the unit and the fixed unit can be set to a constant value independent of the rotation angle.
- the panning drive magnet, the tilting drive magnet, and the rolling drive magnet are each incorporated in the movable unit, and the panning drive magnet, the tilting drive magnet, and the rolling are formed on the convex partial spherical surface of the movable unit that contacts the concave conical surface of the fixed unit. Since the drive magnet is not exposed, the friction coefficient between the movable unit and the fixed unit can be reduced.
- the coefficient of friction between the movable unit and the fixed unit can be further reduced by making the concave conical surface of the fixed unit and the convex partial spherical surface of the movable unit of plastic resin having excellent slidability.
- the friction coefficient between the movable unit and the fixed unit can be further reduced by interposing at least three support balls between the concave conical surface of the fixed unit and the convex partial spherical surface of the movable unit.
- a panning drive unit, a tilting drive unit and a rolling drive unit are configured at a height position that is orthogonal to the optical axis and inclined 30 degrees below a horizontal plane including the spherical center of the convex portion spherical surface of the movable unit, and By configuring the support ball at a height inclined 45 degrees below the horizontal plane, it is possible to achieve both reduction in the coefficient of friction between the movable unit and the fixed unit and reduction in the height of the device.
- the panning drive coil, tilting drive coil, and rolling drive coil that are components of the fixed unit are integrated with the panning magnetic yoke, tilting magnetic yoke, and rolling magnetic yoke. Molding is possible, and the cost of the apparatus can be reduced.
- plastic resin for the movable unit it is integrated with the panning drive magnet, tilting drive magnet, rolling drive magnet, rotation detection magnet, and tilt detection magnet, which are the components of the movable unit. Therefore, the cost of the apparatus can be reduced.
- the coefficient of friction between the movable unit and the fixed unit can be further reduced by making the concave conical surface of the fixed unit and the convex partial spherical surface of the movable unit a plastic resin having excellent slidability.
- the tilt detection unit of the movable unit detects movement due to the tilt of the optical sensor fixed to the fixed unit and the pattern printed on a part of the convex part spherical surface of the movable unit, in the panning and tilting directions.
- the cost of the apparatus can be reduced.
- the present invention can significantly suppress mechanical resonance in the control frequency region by realizing the center of gravity support and center of gravity driving of the movable unit with respect to the fixed unit.
- a drive support system of a movable unit capable of large tilt drive of ⁇ 10 degrees or more in the panning direction and tilting direction and rotational drive in the rolling direction, good vibration in a wide frequency range up to about 50 Hz Correction control can be realized.
- the movable unit by providing driving means for two-dimensionally moving the image sensor in a plane perpendicular to the optical axis and driving means for rotating the image sensor about the optical axis, image blur due to walking shake is reduced. Axis correction is possible. As a result, it is possible to provide a small and robust 6-axis correction camera drive device that realizes a camera shake correction and rotation correction function in units of pixels of the image sensor, which is an unprecedented function.
- FIG. 1 is an exploded perspective view showing a camera driving device 165 according to the first embodiment of the present invention.
- FIG. 2 is an exploded perspective view showing a detailed configuration of the movable unit 180 according to the first embodiment of the present invention.
- FIG. 3A and FIG. 4A are perspective views of the camera driving device 165 as viewed obliquely from above.
- FIG. 3B and FIG. 4B are perspective views of the camera driving device 165 in a state in which the dropout prevention member 201 which is a part of the constituent elements is removed, as viewed obliquely from above.
- FIG. 5 is a perspective view of the drop-off prevention member 201 as viewed obliquely from above.
- FIG. 6A is a plan view of the camera driving device 165 viewed from the direction of the optical axis 10 of the lens mounted on the lens unit 101.
- FIG. 6B is a plan view of the camera driving device 165 viewed from the direction of the straight line 13.
- FIG. 7 is a perspective view of the movable unit 180 and the drive unit as viewed from above, with the image sensor drive unit 99, the lens unit 101, the camera cover 150, and the base 200 removed.
- FIG. 8 is a perspective view of the fixed unit 300 as viewed from above.
- FIG. 9 is an exploded perspective view showing a schematic configuration of the fixed unit 300.
- 10A and 10B are a top view of the camera driving device 165 and a cross-sectional view of the camera driving device 165 in a plane including the optical axis 10 and the panning direction rotation axis 12, respectively.
- 11A and 11B are a top view of the camera driving device 165 and a cross-sectional view of the camera driving device 165 in a plane including the optical axis 10 and the tilting direction rotation axis 11, respectively.
- 12A and 12B are a top view of the camera driving device 165 and a cross-sectional view of the camera driving device 165 in a plane including the optical axis 10 and the straight line 14, respectively.
- FIG. 13A is a perspective view of the image sensor 108 and the image sensor holder 116, which are components of the image sensor drive unit, as viewed from above.
- FIG. 13B is a perspective view of the image sensor 108, the image sensor holder 116, the image sensor drive coils 117 and 118, and the tilt detection magnet 406 as viewed from below, which are components of the image sensor drive unit.
- FIG. 13C is another perspective view of the image sensor 108, the image sensor holder 116, the image sensor drive coil 118, and the tilt detection magnet 406, which are components of the image sensor drive unit, as viewed from below.
- FIG. 14 is a perspective view of the camera driving device 165 viewed from above in a state where the movable unit 180 is inclined at the same angle in the panning direction 20 and the tilting direction 21 by the combined angle ⁇ xy.
- FIG. 15A is a top view of the camera driving device 165.
- 15B is a cross-sectional view of the camera driving device 165 in a plane including the optical axis 10 and the straight line 14 in a state where the movable unit 180 is inclined at the same angle in the panning direction 20 and the tilting direction 21 by the combined angle ⁇ xy. It is.
- FIG. 16A is a perspective view of the second magnetic sensor 700, the panning drive magnet 401, and the tilting drive magnet 402 provided in the fixed unit as viewed from above.
- FIG. 16B is a top view of the second magnetic sensor 700, the panning drive magnet 401, and the tilting drive magnet 402 provided in the fixed unit.
- FIG. 16C is a cross-sectional view of the second magnetic sensor 700, the panning drive magnet 401, and the tilting drive magnet 402 provided in the fixed unit on a plane including the optical axis 10 and the panning direction rotation axis 12.
- FIG. 17 is an exploded perspective view showing the positional relationship between the fixed unit and the support ball 55.
- 18A and 18B are a top view of the fixed unit and a cross-sectional view of the fixed unit in a plane including the optical axis 10 and the tilting direction rotating shaft 11, respectively.
- 19A and 19B are a top view of the fixed unit and a cross-sectional view of the fixed unit in a plane including the optical axis 10 and the center of the support ball 55, respectively.
- 20A and 20B are perspective views seen from above showing the relative angular position of the camera driving device 165 with respect to the photographing horizontal reference.
- the main configuration of the camera driving device 165 will be described with reference to these drawings.
- the camera driving device 165 includes a movable unit 180 that houses the camera unit 100 and a fixed unit 300 that supports the movable unit 180.
- the camera unit 100 includes a lens unit 101 and an image sensor driving unit 99.
- the movable unit 180 is centered on the rolling direction 22 that rotates about the optical axis 10 of the lens, the tilting direction 21 that rotates about the tilting direction rotation axis 11, and the panning direction rotation axis 12 with respect to the fixed unit 300. It rotates freely in the rotating panning direction 20.
- the tilting direction rotating shaft 11 and the panning direction rotating shaft 12 are orthogonal to each other.
- the camera driving device 165 rotates the movable unit 180 around the optical axis 10 of the lens with respect to the fixed unit 300 and a driving unit for tilting the movable unit 180 in the panning direction 20 and the tilting direction 21. And a rolling drive unit that rotates in the rolling direction 22.
- the panning drive unit includes a pair of panning drive magnets 401 provided in the movable unit 180, a pair of panning drive coils 301 provided in the fixed unit 300, and a pair of panning magnetic yokes 203 made of a magnetic material. Further, around the pair of panning drive coils 301, a pair of rolling drive coils 303 that are rotationally driven in the rolling direction 22 around an optical axis 10 to be described later are wound.
- the tilting drive unit includes a pair of tilting drive magnets 402 provided in the movable unit 180, a pair of tilting drive coils 302 provided in the fixed unit 300, and a pair of tilting magnetic yokes 204 made of a magnetic material. .
- the rolling drive unit includes a pair of rolling drive magnets, a pair of rolling drive coils 303, and a pair of rolling magnetic yokes. Further, around the pair of tilting drive coils 302, a pair of rolling drive coils 303 that are driven to rotate in the rolling direction 22 around an optical axis 10 to be described later are wound.
- the camera driving device 165 includes a detector for detecting the inclination angle of the movable unit 180 with respect to the fixed unit 300 and the rotation angle of the lens 105 around the optical axis 10. Specifically, the two-dimensional tilt angle of the movable unit 180, that is, the first detector for detecting the rotation angle in the panning direction 20 and the tilting direction 21, and the rotation angle of the lens 105 about the optical axis 10 are detected. And a second detector for detecting.
- the first detector includes a first magnetic sensor 501 and a tilt detection magnet 406.
- the lens unit 101 forms a subject image on the imaging surface of the image sensor 108, and fixes the lens 105 having the optical axis 10, the lens holder 106 that holds the lens 105, and the lens holder 106.
- the image sensor 108 is, for example, a CMOS sensor or a CCD sensor.
- the lens unit 101 is fixed to the camera cover 150.
- the image sensor driving unit 99 includes an image sensor 108, an image sensor holder 116 that holds the image sensor 108, a magnetic member 121 that is fixed to the image sensor holder 116, and image sensor drive coils 117 and 118.
- the image sensor driving unit 99 is connected to a wiring 110 for outputting an output signal of the image sensor 108 to the outside.
- the wiring 110 is configured by a flexible cable, for example.
- the fixed unit 300 includes a base 200.
- the base 200 has a recess in which at least a part of the movable unit 180 is loosely fitted.
- the inner surface of the recess is constituted by a concave spherical surface 200A.
- the base 200 further includes openings 200P and 200T and a contact surface 200B.
- the concave spherical surface may be referred to as a concave conical surface.
- the camera driving device 165 uses a pair of panning magnetic yokes 203 and a pair of tilting magnetic yokes 204 as rolling magnetic yokes in order to rotate the movable unit 180 in the rolling direction 22.
- Four rolling drive coils 303 are provided for winding them.
- a pair of panning drive magnets 401 and a pair of tilting drive magnets 402 are used in combination as rolling drive magnets.
- the rolling drive coil 303 includes a pair of panning magnetic yokes 203 and a pair of tilting magnetic yokes 204 in the coil winding direction of the panning drive coil 301 and the tilting drive coil 302.
- the cross-winding configuration is such that they are laminated and wound so as to be orthogonal to each other, and are inserted into and fixed to the openings 200P and 200T of the base 200, respectively.
- the fixed unit 300 including the base 200 is made of resin. Further, in the fixed unit 300 including the base 200, a panning drive coil 301 and a rolling drive coil 303 wound around a pair of panning magnetic yokes 203, and a tilting drive coil 302 wound around a pair of tilting magnetic yokes 204. And the rolling drive coil 303 may be integrally formed. Further, these drive coils wound around the magnetic yoke may not be exposed on the inner surface of the base 200, that is, the concave conical surface 200A.
- the movable unit 180 includes a camera cover 150 and a lower movable portion 102.
- the camera cover 150 that fixes the lens unit 101 is fixed to the lower movable unit 102 in which the image sensor driving unit 99 is built.
- the image sensor holder-116 for fixing the image sensor 108 is provided with a plane portion 116A having a plane perpendicular to the optical axis 10, and at the bottom of the lower movable portion 102 A flat portion 102B is provided.
- the three support spheres 122 are held between the flat portion 116A and the flat portion 102B.
- the image sensor holder-116 is supported by a sphere (ball supported) on the lower movable unit 102 in a plane perpendicular to the optical axis 10. In this ball support state, the image sensor drive coils 117 and 118 are fixed to the image sensor holder-116 so as to face the inclination detection magnet 406 through a predetermined gap.
- the imaging element holder-116 is provided with a magnetic member 121, and the three support spheres 122 are held by the magnetic attraction force by the tilt detection magnet 406.
- the pair of image sensor driving coils 117 is arranged in parallel to the tilting direction rotation axis 11 with respect to the tilt detection magnet 406 that is unipolarly magnetized in the direction of the optical axis 10.
- the pair of imaging element drive coils 118 are arranged in parallel to the panning direction rotation axis 12.
- the winding central axis of the pair of image sensor driving coils 117 and 118 is parallel to the optical axis 10. A part of the image sensor driving coils 117 and 118 overlaps with a four-divided region divided by the tilting direction rotating shaft 11 and the panning direction rotating shaft 12 in a region where the tilt detection magnet 406 is projected in the optical axis 10 direction. In this manner, the image sensor driving coils 117 and 118 are arranged.
- the image sensor holder-116 receives the electromagnetic force from the tilt detection magnet 406, and the image sensor holder-116 moves in the direction of the tilting direction rotation axis 11 that is the rotation axis in the tilting direction. It becomes possible to move.
- the image sensor holder-116 can move in the direction of the panning direction rotation axis 12, which is the rotation axis of the panning direction, by receiving electromagnetic force from the tilt detection magnet 406. It becomes.
- a third magnetic sensor 119 is fixed to the image sensor holder-116 in each of the four divided areas obtained by projecting the tilt detection magnet 406 in the direction of the optical axis 10.
- the third magnetic sensor 119 detects the magnetic change of the tilt detection magnet 406 to calculate the amount of movement of the image sensor holder-116 in the direction of the tilting direction rotating shaft 11 and the direction of the panning direction rotating shaft 12. To do.
- the shake correction in the direction of the direction rotation axis 11 and the direction of the panning direction rotation axis 12 can be realized.
- the lower movable part 102 includes a bowl shape having an opening 102H.
- the lower movable portion 102 has a convex partial spherical surface 102R on its outer shape.
- the convex partial spherical surface 102R may be at least a part of the spherical surface, or may be the entire spherical surface.
- the convex partial spherical surface 102 ⁇ / b> R has a spherical center 70. As shown in FIGS.
- the convex partial spherical surface 102R of the lower movable portion 102 is provided with three cylindrical concave portions 200F provided on the concave spherical surface 200A on the inner side surface of the base 200, with a resin support ball holder. A point contact is made with three support balls 55 fitted through 56.
- the convex partial spherical surface 102R covers the entire outside of the lower movable portion 102.
- the spherical center 70 of the convex partial spherical surface 102R is located substantially at the center of the lower movable portion 102.
- the lower movable unit 102 is provided with a notch 102S having a recess into which a part of the wiring 110 is inserted. Good.
- the movable unit 180 is provided with a tilt detection magnet 406, a pair of panning drive magnets 401, and a pair of tilting drive magnets 402.
- the detection magnet and the drive magnet to be mounted can be arranged from the opening 102H to the inside of the lower movable portion 102 so as not to be exposed to the convex partial spherical surface 102R.
- the tilt detection magnet 406 is disposed on the optical axis 10 at the bottom of the lower movable unit 102.
- the lower movable portion 102 is made of, for example, a resin having excellent slidability. Further, the lower movable portion 102, the tilt detection magnet 406, the pair of panning drive magnets 401, and the pair of tilting drive magnets 402 may be integrally formed.
- the panning magnetic yoke 203 and the tilting magnetic yoke 204 provided inside the base 200 are made of a magnetic material, they are provided inside the lower movable portion 102 so as to face each other.
- the panning drive magnet 401 and the tilting drive magnet 402 thus formed function as an attracting magnet, and a magnetic attraction force is generated between them.
- the magnetic attraction force F1 is obtained from the panning magnetic yoke 203 and the panning drive magnet 401
- the magnetic attraction force F1 is obtained from the tilting magnetic yoke 204 and the tilting drive magnet 402.
- the three cylindrical concave portions 200F are formed in a concave cone with an angle ⁇ b as a starting point from a straight line 14 that forms 45 degrees with the panning direction rotational axis 12 and the tilting direction rotational axis 11 when viewed from the optical axis 10 direction. It is disposed on the surface 200A.
- the cylindrical recess 200F has a conical inner surface.
- the angle ⁇ b is 120 degrees.
- each of the three support balls 55 has a convex partial spherical surface, and comes into contact with the convex partial spherical surface 102R of the lower movable portion 102 at three contact points 102P.
- Reference numeral 61 denotes an inclination angle ⁇ s (inclination angle C) downward with respect to a horizontal plane P perpendicular to the optical axis 10 and passing through the spherical center 70 of the convex partial spherical surface 102R.
- the inclination angle ⁇ s is, for example, 45 degrees, but may be in the range of 30 degrees to 60 degrees.
- the lower movable portion 102 is supported at only three points with respect to the fixed unit 300 and the support ball 55 can rotate, thereby maximizing the friction generated between the movable unit 180 and the fixed unit 300. Therefore, extremely good dynamic characteristics of the movable unit 180 can be obtained.
- the lower movable portion 102 is opposed to each other.
- Magnetic attraction force F ⁇ b> 1 is generated between the panning drive magnet 401 and the tilting drive magnet 402 that are used together as a rolling drive magnet provided inside the magnet.
- the magnetic attractive force F1 is a vertical drag between the convex partial spherical surface 102R of the movable unit 180 and the three support balls 55, and obtains the magnetic attractive force F2 as a combined vector in the direction of the optical axis 10.
- the three support balls 55 enable the movable unit 180 to be supported with respect to the fixed unit 300, and the support balls 55 are evenly arranged around the optical axis 10 at an angular interval of 120 degrees. Excellent dynamic characteristics can be realized with an extremely stable support structure. In particular, by setting the inclination angle ⁇ s to about 45 degrees, the force applied to the circumferential line contact portion between the support ball 55 and the support ball holder 56 by the magnetic attractive force F2 becomes uniform. The friction coefficient between 300 can be further reduced.
- the three movable balls 55 of the base 200 and the partial spherical surface of the convex partial spherical surface 102R of the lower movable portion 102 are in point contact at the contact point 102P, while the lower movable portion 102 is centered on the spherical center 70.
- the movable unit 180 is supported by the fixed unit 300 in a state where three contact points 102 ⁇ / b> P are arranged around the optical axis 10.
- the present embodiment is characterized in that the concave spherical surface 200A of the base 200 and the convex partial spherical surface 102R of the lower movable portion 102 are supported by at least three point contacts, and a specific example for realizing this support is provided.
- the structure is not limited to the support ball 55.
- it can be realized by a convex portion having three convex partial spherical surfaces made of resin or the like.
- a panning direction 20 that is orthogonal to the optical axis 10 and rotates around the panning direction rotation axis 12 that passes through the spherical center 70, and a chill that is orthogonal to the optical axis 10 and the panning direction rotation axis 12.
- Two kinds of tilting direction rotation of the tilting direction 21 rotating about the tilting direction rotation axis 11 and rotation of the rolling direction 22 rotating about the optical axis 10 can be performed.
- the movable unit 180 can rotate in the panning direction 20, the tilting direction 21 and the rolling direction 22 with almost the same moment. As a result, no matter how the movable unit 180 rotates in the panning direction 20, the tilting direction 21 and the rolling direction 22, the panning direction 20, the tilting direction 21 and the rolling direction 22 are always maintained with substantially the same driving force.
- the movable unit 180 can always be driven with high accuracy.
- the movable unit 180 and the center of gravity of the movable unit 180 coincide, the moment that the movable unit 180 rotates in the panning direction 20, the tilting direction 21, and the rolling direction 22 is very high. small. For this reason, the movable unit 180 can be maintained in a neutral state with a small driving force, and can be rotated in the panning direction 20, the tilting direction 21, and the rolling direction 22. For this reason, the power consumption of the camera drive device 165 can be reduced. In particular, the driving current required for maintaining the movable unit 180 in a neutral state can be made almost zero.
- the movable unit 180 including the lens unit 101 and the image sensor driving unit 99 is intensively supported at the ball center 70 which is the center of gravity. Therefore, the load due to friction can be reduced, and mechanical resonance can be significantly suppressed in the drive frequency region.
- the panning drive magnet 401 and the tilting drive magnet 402 disperse a constant vertical drag between the support ball 55 and the convex partial spherical surface 102R with a constant magnetic attraction without being affected by the rotation angle. To add. For this reason, it is possible to suppress the fluctuation of the friction load due to the rotation angle and to realize a favorable phase / gain characteristic in the drive frequency region.
- the lower movable portion 102 having the convex partial spherical surface 102R and the support ball holder 56 are made of a resin member such as plastic, it is possible to further reduce the friction between the supporting ball 55 and the convex partial spherical surface 102R that are in contact with each other. Yes, a support structure with excellent wear resistance can be realized.
- the camera driving device 165 typically includes a drop-off prevention member 201 that restricts the movement of the movable unit 180 so that the movable unit 180 does not fall off the fixed unit 300.
- the dropout prevention member 201 has a dropout prevention regulating surface 201A.
- a predetermined gap (not shown) is a convex partial spherical surface 102 ⁇ / b> R of the lower movable portion 102 so that the lower movable portion 102 can freely rotate with respect to the spherical center 70 in the entire movable range.
- the drop-off prevention regulating surface 201A of the drop-off prevention member 201 is a convex partial spherical surface 102 ⁇ / b> R of the lower movable portion 102 so that the lower movable portion 102 can freely rotate with respect to the spherical center 70 in the entire movable range.
- the drop-off prevention regulating surface 201A has a concave partial spherical surface having a center coinciding with the spherical center 70 of the convex partial spherical surface 102R of the lower movable portion 102.
- the drop-off prevention member 201 is fixed to the contact surface 200 ⁇ / b> B of the base 200.
- a gap is formed between the convex partial spherical surface 102R and the drop-off prevention regulating surface 201A in a state where the convex partial spherical surface 102R of the lower movable portion 102 is in point contact with the support ball 55 of the fixed unit 300 at the contact point 102P. Yes.
- the movable unit 180 is made convex by the magnetic partial force F1. It is possible to return to the original state where 102R is in point contact with the support ball 55.
- the shock resistance can be immediately restored to the original good support state by the magnetic attractive force F1.
- An excellent camera drive device can be provided.
- a pair of panning drive magnets 401 are arranged symmetrically with respect to the optical axis 10 in the lower movable unit 102 to rotationally drive the movable unit 180 in the panning direction 20, and the movable unit 180 is rotationally driven in the tilting direction 21.
- the pair of tilting drive magnets 402 are arranged symmetrically with respect to the optical axis 10.
- “symmetric with respect to the optical axis 10” means that the movable unit 180 is symmetric with respect to the optical axis 10 in a neutral state, that is, not inclined with respect to the fixed unit 300. It means that there is.
- the panning drive magnet 401 is magnetized in one pole so as to have a magnetic flux in the direction of the tilting direction rotating shaft 11.
- the tilting drive magnet 402 has a magnetic flux in the direction of the panning direction rotating shaft 12. Are magnetized to one pole.
- Each is provided on the circumference.
- each of the pair of panning magnetic yokes 203 arranged on the base 200 in the direction of the tilting direction rotating shaft 11 is provided with a panning drive coil 301 around which the panning magnetic yoke 203 is wound. Further, a rolling drive coil 303 is provided outside the panning drive coil 301 so as to be orthogonal to the winding direction of the panning drive coil 301.
- each of the pair of tilting magnetic yokes 204 arranged in the direction of the panning direction rotation axis 12 orthogonal to the tilting direction rotation axis 11 is provided with a tilting drive coil 302 around which the tilting magnetic yoke 204 is wound.
- the rolling drive coil 303 is provided outside the tilting drive coil 302 so as to be orthogonal to the winding direction of the tilting drive coil 302.
- the driving units in the panning direction 20, the tilting direction 21, and the rolling direction 22 are separately distributed on the circumference around the optical axis 10.
- the magnetic gap between the panning magnetic yoke 203 and the panning drive magnet 401 and the magnetic gap between the tilting magnetic yoke 204 and the tilting drive magnet 402 can be provided evenly. For this reason, each magnetic flux density can be improved uniformly, and the driving efficiency in the panning direction 20, the tilting direction 21, and the rolling direction 22 is greatly improved.
- the ball center 70 and the tilting drive coil 302 are perpendicular to the winding center axes 40 and 41 of the tilting drive coil 302 wound around the tilting magnetic yoke 204 fixed to the base 200.
- the straight lines 30 and 31 passing through the center of the vertical axis form an inclination angle ⁇ p of 45 degrees or less downward with respect to the horizontal plane P perpendicular to the optical axis 10 and passing through the spherical center 70.
- the pair of tilting drive magnets 402 are disposed on the movable unit 180 so as to face the pair of tilting drive coils 302.
- FIG. 11B it is perpendicular to the winding center axes 42 and 43 of the panning drive coil 301 wound around the panning magnetic yoke 203 fixed to the base 200, and the center of the ball core 70 and the panning drive coil 301 is centered.
- the straight lines 32 and 33 that pass through form an inclination angle ⁇ p (inclination angle A) of 45 degrees or less downward with respect to a horizontal plane P that is perpendicular to the optical axis 10 and passes through the spherical center 70.
- the pair of panning drive magnets 401 are also disposed on the movable unit 180 so as to face the pair of panning drive coils 301.
- a straight line that is perpendicular to the winding center axis of the rolling drive coil 303 and passes through the center of the spherical center 70 and the rolling drive coil 303 is also perpendicular to the optical axis 10 and to a horizontal plane P that passes through the spherical center 70.
- An inclination angle ⁇ r (inclination angle B) of 45 degrees or less is formed downward.
- the winding center shafts 40 and 41 have a pair of openings 200T for inserting the tilting magnetic yoke 204 and the tilting drive coil 302 shown in FIGS.
- the center line of the pair of openings 200P for inserting the panning magnetic yoke 203 and the panning drive coil 301 also coincides with the winding center axis of the panning drive coil 301.
- the inclination angle ⁇ p is about 20 to 25 degrees.
- the pair of panning drive magnets 401 receives a couple of electromagnetic forces, and the lower movable unit 102, that is, the movable unit 180, moves in the panning direction 20 about the panning direction rotating shaft 12. Driven by rotation.
- the pair of tilting drive magnets 402 receives a couple of electromagnetic forces, and the movable unit 180 moves the tilting direction 21 around the tilting direction rotating shaft 11. Is driven to rotate.
- the movable unit 180 on which the image sensor drive unit 99 and the lens unit 101 are mounted can be tilted two-dimensionally. 14, 15A, and 15B, the same current is applied to the panning drive coil 301 and the tilting drive coil 302 simultaneously, so that the panning direction 20 and the tilting direction 21 are inclined at the same angle, resulting in panning.
- the movable unit 180 receives electromagnetic force in the same rotational direction, and the movable unit 180 is rotationally driven about the optical axis 10 in the rolling direction 22.
- the present embodiment employs a moving magnet drive system in which the movable unit 180 is provided with the panning drive magnet 401 and the tilting drive magnet 402.
- a problem that the weight of the movable unit 180 generally increases can be considered.
- the image sensor driving unit 99 is a wireless camera, only the power line and the drive line of the image sensor driving unit 99 are required.
- the center of gravity of the movable unit 180 and the rotation center point of the movable unit 180 coincide with each other, even if the weight is increased by mounting the drive magnet, the rotational moment of the movable unit 180 does not increase so much. For this reason, according to this embodiment, the advantage by the moving magnet drive system aiming at the inclination and rotation of the movable unit 180 can be enjoyed while suppressing the problem due to the increase in weight.
- the camera driving device 165 is a straight line that forms 45 degrees with respect to the panning direction 20 and the tilting direction 21 around the optical axis 10 as a transmission means. It has a pair of wirings 110 arranged symmetrically in 14 directions.
- a first fixing holder 120 that fixes and positions the wiring 110 is fixed to the contact surface 200 ⁇ / b> C of the base 200. Furthermore, the inclined surface 120 ⁇ / b> A (see FIG. 1) of the first fixed holder 120 is inclined downward from a horizontal plane that is orthogonal to the optical axis 10 and includes the spherical center 70, as shown in FIGS. 12B and 15B.
- the back surface of the wiring 110 is fixed to the inclined surface 120A by adhesion or the like or by the second fixing holder 130. Further, by fixing the first fixing holder 120 to the contact surface 200C of the base 200, the wiring 110 is narrowed by the inclined surface 120A (see FIGS. 1 and 2) of the first fixing holder 120 and the second fixing holder 130. Then, the wiring 110 is positioned.
- the moving magnet drive system has a great advantage that the heat generated by the panning drive coil 301, the tilting drive coil 302, and the rolling drive coil 303 can be cooled by the base 200 via the panning magnetic yoke 203 and the tilting magnetic yoke 204. . Furthermore, even when the inclination angle in the panning direction 20 and the tilting direction 21 and the rotation angle in the rolling direction 22 are 20 degrees or more, it is advantageous in that the movable unit 180 can be reduced in size and weight. On the other hand, in the moving coil drive system, the drive coil may become too large and the weight of the fixed unit 300 may increase.
- the central axes of the support ball 55, the tilt drive unit, the rotation drive unit, and the tilt detection magnet 406 provided on the center of the support ball 55 pass through the spherical center 70 which is the support center and the drive center.
- the center of gravity of the movable unit 180 coincides with the spherical center 70, and the movable unit 180 is supported by the center of gravity.
- rotational driving about three axes that pass through the center of gravity and are orthogonal to each other can be realized, and the movable unit 180 can be prevented from falling off.
- the camera driving device 165 may include a viscous member (not shown) in order to reduce the amplitude increase coefficient (Q value) of the movable unit 180.
- a viscous member is provided between the convex partial spherical surface 102R of the lower movable portion 102 and the concave spherical surface 200A of the base 200 or the falling prevention regulating surface 201A of the falling prevention member 201. .
- the panning drive magnet 401 and the tilting drive magnet 402 provided in the movable unit 180 and the panning magnetic yoke 203 and the tilting magnetic yoke 204 provided in the base 200 are generated by an inclination and a rotation angle, respectively. Therefore, it is possible to reduce the amplitude increase coefficient (Q value) of the vibration due to the magnetic spring effect and the Q value of the mechanical natural vibration caused by the fluctuation of the magnetic attraction force, and to obtain good control characteristics.
- a convex / concave shape (not shown) may be provided on the surface of the convex partial spherical surface 102 ⁇ / b> R of the lower movable portion 102 where the locus of the contact point 102 ⁇ / b> P does not exist.
- the camera driving device 165 includes a first magnetic sensor 501 that is a first detector.
- the first magnetic sensor 501 can detect inclination or rotation around two axes, and is disposed so as to face the inclination detection magnet 406 magnetized to one pole in the direction of the optical axis 10.
- the first magnetic sensor 501 is inserted into the opening 200H through the circuit board 502 and fixed to the base 200.
- the circuit board 502 is fixed to the base 200 with compression screws via compression springs 600 at three locations.
- the three adjusting screws By rotating the three adjusting screws, the relative inclination and distance of the first magnetic sensor 501 with respect to the inclination detecting magnet 406 change. This makes it possible to optimally adjust the tilt output signal of the first magnetic sensor 501.
- the first magnetic sensor 501 is symmetrically disposed on the tilting direction rotating shaft 11 and the panning direction rotating shaft 12 one by one with respect to the optical axis 10.
- the first magnetic sensor 501 differentially detects the change in magnetic force of the tilt detection magnet 406 caused by the tilting operation of the movable unit 180 in the panning direction 20 and the tilting direction 21 as two-axis components, and the panning tilt angle and tilting.
- the tilt angle can be calculated.
- the first magnetic sensor 501 is symmetrically paired on a straight line 13 and a straight line 14 that form 45 degrees with respect to the tilting direction rotating shaft 11 and the panning direction rotating shaft 12, respectively. You may arrange.
- the distance between the inclination detection magnet 406 and the ball core 70 can be shortened, and the movement of the inclination detection magnet 406 with respect to the inclination angle can be reduced. Miniaturization is possible.
- the first magnetic sensor 501 is arranged on the straight line 13 and the straight line 14, thereby being affected by the magnetic field generated by energizing the panning drive coil 301 and the tilting drive coil 302. Therefore, the panning tilt angle and tilting tilt angle can be calculated optimally.
- the first detector includes the first magnetic sensor 501 and the tilt detection magnet 406, but the first detector may be realized by other configurations.
- the first detector may include a light sensor provided in the fixed unit 300 and a light detection pattern provided in the movable unit 180 on the optical axis 10.
- the light detection pattern is inclined, so that the light incident on the optical sensor changes. It is also possible to calculate a two-dimensional tilt angle in the panning and tilting directions by detecting the change of the light by the optical sensor.
- the second detector detects the rotation angle of the movable unit 180 in the rolling direction 22 around the optical axis 10.
- the second detector includes a pair of tilting drive magnets 402 mounted on the movable unit 180 and a base 200 so as to face the pair of tilting drive magnets 402. And a pair of second magnetic sensors 700.
- the tilting drive magnet 402 is a component of the second detector, but the panning drive magnet 401 may be a component of the second detector.
- FIG. 20A shows a shooting posture with the camera driving device 165 described above.
- the tilting direction rotation axis 11 is parallel to the horizontal reference HS of the subject, and the panning direction rotation axis 12 is vertical. It goes without saying that good camera drive can be performed even in this posture state.
- FIG. 20B shows another shooting posture of the camera driving device 165.
- the tilting direction rotating shaft 11 is inclined 45 degrees with respect to the horizontal reference HS of the subject, and the panning direction rotating shaft 12 is also inclined 45 degrees.
- the advantage in the shooting posture state shown in FIG. 20B is that when the movable unit 180 is driven (panning drive) in the horizontal reference HS direction, by energizing both the panning drive coil 301 and the tilting drive coil 302, FIG.
- the movable unit 180 is driven (tilting drive) in a direction perpendicular to the horizontal reference HS in the subject, by energizing both the panning drive coil 301 and the tilting drive coil 302, the original chill shown in FIG.
- the driving in the tilting direction 21 is possible.
- the original panning direction 20 and tilting direction 21 shown in FIG. 20A can be realized by energizing the two coils.
- the driving angle in the original panning direction and tilting direction which are assumed to be frequently used, becomes a rotation angle of 1 / ⁇ 2 times.
- the magnetic spring effect of the magnetic attractive force generated between the drive magnet provided in the movable unit 160 and the magnetic yoke provided in the fixed unit 300 can be reduced, and satisfactory camera drive can be realized.
- the spherical center 70 of the convex partial spherical surface 102 ⁇ / b> R provided on the movable part of the movable unit 180 is disposed on the optical axis of the lens of the camera unit 100.
- the central axis of the support ball 55 arranged in a circumferential shape of the fixed unit 300 passes through the spherical center 70.
- a certain vertical force is obtained by a magnetic attraction force that is not easily influenced by the rotation angle of the movable unit 180. Drag can be added. For this reason, it is possible to reduce the frictional load variation due to the rotation angle, and to realize good phase / gain characteristics in the drive frequency region.
- the movable unit 180 provided on the fixed unit 300 is rotated.
- a drop-preventing restricting surface 201A is provided through a possible predetermined gap. Therefore, it is possible to reliably prevent the movable unit 180 from dropping while avoiding an increase in the size of the apparatus.
- the convex partial spherical surface 102R of the movable unit 180 is caused by the magnetic attractive force.
- the position of the drop-off prevention regulating surface 201A can be determined so that the point can come into point contact with the support ball 55 of the fixed unit 300 again. For this reason, even if the movable unit 180 falls off instantaneously, it is possible to provide a camera drive device with extremely high impact resistance that can immediately return to the original good support state.
- the drive units provided in the panning, tilting, and rolling directions are respectively arranged on two lines orthogonal to each other on a plane perpendicular to the optical axis, and two pairs of drive magnets fixed to the movable unit 180, And two pairs of drive coils respectively disposed on the fixed unit 300 in a circumferential shape centering on the optical axis so as to face the pair of drive magnets.
- the height position in the optical axis direction in which these are arranged is arranged at a height position inclined downward from the horizontal plane including the ball center 70. For this reason, the movable unit 180 can be driven by the ball core 70, and the height can be reduced.
- the movable unit 180 and the base 200 are made of a resin material, or the convex spherical surface 102R and the surface portion of the support ball holder 56 are covered with a resin member, so that the support structure has low friction and excellent wear resistance. Is realized.
- a viscous member can be filled in the gap formed by the convex partial spherical surface 102R of the movable unit 180 and the concave spherical surface of the base inner surface or the drop-off prevention regulating surface 201A.
- the amplitude increase coefficient (Q value) of the vibration due to the magnetic spring effect caused by the magnetic attraction force fluctuation generated between the drive magnet provided in the movable unit 180 and the magnetic yoke provided in the fixed unit 300 and the machine The natural vibration Q value can be reduced, and good control characteristics can be obtained.
- the movable unit 180 is inclined at a large angle of ⁇ 10 degrees or more in the panning direction 20 and the tilting direction 21 and ⁇ 10 degrees or more in the rolling direction 22.
- the movable unit 180 can be rotated at a large angle.
- good shake correction control can be realized in a wide frequency range up to about 50 Hz.
- the shake correction in the three axis directions of the camera unit 100 is performed.
- shake correction in the translation direction of the camera which has been difficult to realize by shake correction by rotation drive, is realized in pixel units by image sensor drive.
- the movable unit 180 In addition to shake correction in the triaxial direction, shake correction in the translational direction of the camera is possible.
- the camera since the camera is provided with a small and robust drop-off prevention structure, a camera drive device having high impact resistance against external impacts such as vibration and drop impact can be realized.
- the tilt detection magnet 406 can be used as a driving magnet.
- the tilt detection magnet 406 can be used in combination as a magnet for detecting the movement amount.
- the magnet used in the drive unit and the magnet used in the detection unit can be shared.
- the camera drive device 165 can be downsized and the number of parts can be reduced.
- the rolling drive coil is laminated and wound so as to be orthogonal to the coil winding direction of the pair of panning drive coils 301 with respect to the pair of panning magnetic yokes, and the pair of tilting drives with respect to the pair of tilting magnetic yokes. It has a cross-winding configuration in which the coils 302 are stacked and wound so as to be orthogonal to the coil winding direction. For this reason, space saving of the fixed unit 300, size reduction, and reduction of a number of parts are realizable.
- the camera driving device 165 of the present embodiment high-speed panning, tilting, and rolling operations of the camera unit 100 and translational shake correction in units of pixels can be realized, and are generated due to camera shake during walking shooting. Therefore, it is possible to correct the image shake of the captured image very well.
- the camera unit 100 can be tracked and photographed at high speed by performing panning / tilting / rolling operations at high speed in a wide frequency range.
- a compact and robust drop-off prevention structure realizes a camera drive device that has high impact resistance against external impacts such as vibration and drop impact.
- FIG. 21 is an exploded perspective view showing a detailed configuration of the movable unit 180 according to the second embodiment of the present invention.
- 22A and 22B are a top view of the camera driving device 165 and a cross-sectional view in a plane including the optical axis 10 and the panning direction rotation axis 12, respectively.
- 23A and 23B are a top view of the camera driving device 165 and a cross-sectional view in a plane including the optical axis 10 and the tilting direction rotation axis 11, respectively.
- 24A and 24B are a top view of the camera driving device 165 and a cross-sectional view in a plane including the optical axis 10 and the straight line 14, respectively.
- FIG. 25A is a perspective view of the image sensor 108 and the image sensor holder 116, the panning drive magnet 401, and the tilting drive magnet 402, which are components of the image sensor drive unit 99, as viewed from above.
- FIG. 25B illustrates the image sensor 108, the image sensor holder 116, the image sensor drive coils 117 and 118, the image sensor rotation drive coil 123, the panning drive magnet 401, and the tilting drive magnet 402 that are the components of the image sensor drive unit 99.
- FIG. 25B illustrates the image sensor 108, the image sensor holder 116, the image sensor drive coils 117 and 118, the image sensor rotation drive coil 123, the panning drive magnet 401, and the tilting drive magnet 402 that are the components of the image sensor drive unit 99.
- FIG. 25C shows the image sensor 108, the image sensor holder 116, the image sensor drive coil 118, the image sensor rotation drive coil 123, the panning drive magnet 401, and the panning drive magnet 401 from below, which are components of the image sensor drive unit. It is the other perspective view seen.
- FIG. 26A is a top view of the camera driving device 165.
- FIG. FIG. 26B is a cross-sectional view of the camera driving device 165 on a plane including the optical axis 10 and the straight line 14 in a state where the movable unit 180 is inclined at the same angle in the panning direction 20 and the tilting direction 21 by the combined angle ⁇ xy. .
- the main configuration of the camera driving device 165 will be described with reference to these drawings.
- the difference between the present embodiment and the first embodiment is that, as shown in FIGS. 21, 25A, 25B, and 25C, in the image sensor drive unit 99, the image sensor holder 116 includes an image sensor rotation drive coil 123. That is.
- the lens unit 101 forms a subject image on the imaging surface of the image sensor 108, and fixes the lens 105 having the optical axis 10, the lens holder 106 that holds the lens 105, and the lens holder 106.
- a camera barrel 107 A camera barrel 107.
- the image sensor driving unit 99 includes an image sensor 108, an image sensor holder 116 that holds the image sensor 108, a magnetic member 121 fixed to the image sensor holder 116, image sensor drive coils 117 and 118, and an image sensor.
- a rotation drive coil 123 is included in The image sensor driving unit 99.
- the driving means for moving the image sensor 108 two-dimensionally in a plane perpendicular to the optical axis 10 and the detection means for the movement amount are the same as those in the first embodiment, and thus detailed description thereof is omitted.
- the pair of image sensor rotation driving coils 123 are panned with a gap between the pair of panning driving magnets 401 fixed to the movable unit 180 on the inner curved surface 401A on the spherical center 70 side. It is fixed to the image sensor holder 116 so as to face the magnet 401.
- the pair of imaging element rotation driving coils 123 captures an image so that the tilting driving magnet 402 faces the inner curved surface of the pair of tilting driving magnets 402 fixed to the movable unit 180 on the spherical center side with a gap. It may be fixed to the element holder 116.
- the winding center axis of the image sensor rotation drive coil 123 exists on a plane including the optical axis 10 and the tilting direction rotation axis 11 and is inclined at a predetermined angle with respect to the optical axis 10.
- the pair of image sensor rotation drive coils 123 are energized, the image sensor holder 116 on which the image sensor 108 is mounted is rotated around the optical axis 10 by receiving electromagnetic force from the pair of panning drive magnets 401.
- the image sensor 108 can linearly move between the tilting direction rotation axis 11 and the panning direction rotation axis 12 and can also rotate around the optical axis 10.
- the rolling direction 22 can be corrected in units of pixels by rotating the image sensor 108 around the optical axis 10. Accordingly, by driving the entire movable unit 180 in the rolling direction 22, it is possible to correct the minute rotational shake of the remaining image while performing the macro rotational shake correction. In this way, by controlling the image sensor in units of pixels, a camera driving device that obtains a high-quality image can be provided.
- FIG. 27 is a perspective view showing the arrangement of angular velocity sensors 900, 901, and 902 provided in the camera unit 170 according to the third embodiment of the present invention.
- FIG. 28 is a block diagram of the camera unit 170.
- a camera unit 170 according to the third embodiment of the present invention includes a camera driving device 165 and a control unit 800, and can correct image blur during walking.
- the camera unit 170 includes a camera driving device 165, angular velocity sensors 900, 901, and 902, and a control unit 800.
- the control unit 800 typically includes an arithmetic processing unit 94, an image processing unit 1000, analog circuits 91p, 91t, 91r, amplifier circuits 92p, 92t, 92r, AD converters 93p, 93t, 93r, DA converters 95p, 95t, and 95r, drive circuits 96p, 96t, and 96r, analog circuits 97p, 97t, and 97r, and amplifier circuits 98p, 98t, and 98r are included.
- the embodiment according to the present invention is not limited to this, and for example, the analog circuits 97p, 97t, 97r and the amplifier circuits 98p, 98t, 98r may be provided in the camera driving device 165.
- the angular velocity sensors 900, 901, and 902, analog circuits 91p, 91t, and 91r, amplifier circuits 92p, 92t, and 92r, and AD converters 93p, 93t, and 93r constitute an angular velocity sensor module (not shown).
- the angular velocity sensor module may be electrically connected to the arithmetic processing unit 94.
- the arithmetic processing unit 94 controls the entire camera unit 170.
- the arithmetic processing unit 94 includes, for example, a ROM that stores program information and a CPU that processes program information.
- the ROM stores, for example, an autofocus control (AF control) program, an automatic exposure control (AE control) program, and a program for controlling the overall operation of the camera unit 170.
- AF control autofocus control
- AE control automatic exposure control
- the image processing unit 1000 performs various types of processing on the image data output from the image sensor 108 to generate image data. Examples of various types of processing include, but are not limited to, gamma correction, white balance correction, YC conversion processing, electronic zoom processing, compression processing, and expansion processing.
- the image processing unit 1000 is typically an image signal processor (ISP).
- the arithmetic processing unit 94 may be configured by one semiconductor chip together with the image processing unit 1000 and the like.
- the angular velocity sensors 900, 901, and 902 are attached to the base 200 of the camera driving device 165 or a camera unit main body (not shown) that fixes the base 200.
- Each angular velocity sensor 900, 901, 902 detects an angular velocity around an axis indicated by a broken line in FIG. Specifically, the angular velocity sensors 900, 901, and 902 detect angular velocities in the panning direction 20, the tilting direction 21, and the rolling direction 22, respectively.
- FIG. 27 shows a configuration using three independent angular velocity sensors 900, 901, and 902, one angular velocity sensor that can detect angular velocities around three axes may be used.
- the angular velocity sensor can detect angular velocities around three orthogonal axes, the three axes do not need to coincide with the panning direction 20, the tilting direction 21, and the rolling direction 22.
- the arithmetic processing unit 94 converts the detected acceleration in each axial direction into the panning direction 20.
- the angular velocity in the tilting direction 21 and the rolling direction 22 may be converted.
- the shake angles in the panning direction 20 and the tilting direction 21 due to camera shake during shooting are detected by the angular velocity sensors 900 and 901, respectively.
- the angular velocity sensor 902 detects a swing angle in the rolling direction 22 that occurs due to the movement of the center of gravity of the walking during shooting.
- information on the deflection angles detected by the angular velocity sensors 900, 901, and 902 are output as angular velocity signals 80p, 80t, and 80r, respectively.
- the angular velocity signals 80p, 80t, 80r are converted into signals suitable for performing arithmetic processing in the arithmetic processing unit 94.
- the analog circuits 91p, 91t, 91r remove noise components and DC drift components from the angular velocity signals 80p, 80t, 80r and output them to the amplifier circuits 92p, 92t, 92r.
- the amplifier circuits 92p, 92t, and 92r output angular velocity signals 82p, 82t, and 82r having appropriate values, respectively.
- the AD converters 93p, 93t, and 93r convert the angular velocity signals 82p, 82t, and 82r, which are analog signals, into digital signals, respectively, and output the digital signals to the arithmetic processing unit 94.
- the arithmetic processing unit 94 performs integration processing for converting the angular velocity into a hand shake angle, and sequentially calculates the shake angles in the panning direction 20, the tilting direction 21, and the rolling direction 22.
- the arithmetic processing unit 94 performs a three-axis shake correction process.
- the movable unit 180 mounted with the camera unit 100 is driven so as to suppress the angular velocity in accordance with the angular velocity signals 83p, 83t, and 83r detected by the angular velocity sensors 900, 901, and 902, respectively. Performed by loop control.
- the arithmetic processing unit 94 sequentially outputs target rotation angle signals 84p, 84t, and 84r indicating the optimal digital shake correction amount including the frequency response characteristics of the camera driving device 165, phase compensation, gain correction, and the like.
- the DA converters 95p, 95t, and 95r convert the target rotation angle signals 84p, 84t, and 84r, which are digital signals, into the target rotation angle signals 85p, 85t, and 85r that are analog signals, and output them to the drive circuits 96p, 96t, and 96r. To do.
- the first and second magnetic sensors 501 and 700 for detecting the rotation angle of the movable unit 180 with respect to the base 200 have rotation angle signals 86p in the panning direction 20, the tilting direction 21 and the rolling direction 22, respectively.
- 86t, 86r are output.
- the analog circuits 97p, 97t, 97r remove noise components and DC drift components from the rotation angle signals 86p, 86t, 86r, and output rotation angle signals 87p, 87t, 87r.
- the amplifier circuits 98p, 98t, and 98r amplify the rotation angle signals 87p, 87t, and 87r, and output the rotation angle signals 88p, 88t, and 88r, which are appropriate values, to the drive circuits 96p, 96t, and 96r.
- the drive circuits 96p, 96t, 96r are feedback circuits configured to feed back the rotation angle signals 88p, 88t, 88r to the target rotation angle signals 85p, 85t, 85r. Accordingly, the driving circuits 96p, 96t, and 96r are configured so that the panning direction 20, the tilting direction 21, and the rolling direction 22 of the movable unit 180 are set at predetermined rotational angle positions when no external force is applied to the camera unit 170. Is controlling the angle.
- the drive circuits 96p, 96t, 96r drive signals for driving the panning drive coil 301, the tilting drive coil 302, and the rolling drive coil 303 based on the target rotation angle signals 85p, 85t, 85r and the rotation angle signals 88p, 88t, 88r. Is output.
- feedback control of the angular position of the movable unit 180 is executed in the camera driving device 165, and the movable unit 180 is driven so that the rotation angle signals 88p, 88t, 88r are equal to the target rotation angle signals 85p, 85t, 85r.
- This series of drive control corrects the shake of the movable unit 180 and makes it possible to achieve good and stable shooting even during walking.
- a control system mainly including a rotation angle signal obtained by integrating the output of the angular velocity sensor is shown.
- the present invention is not limited to this, and the arithmetic processing unit 94 outputs the rotation angle signals 88p, 88t, and 88r from the first and second magnetic sensors 501 and 700 of the camera driving device 165 via the AD converter. It is also possible to detect the rotational angular velocity signal of the movable unit 180 by performing capture and differential calculation processing.
- the accuracy of the angular velocity feedback calculation based on the angular velocity signals 83p, 83t, 83r of the camera device and the rotation angle signal of the movable unit 180 is further improved, and hand shake and walking shake are suppressed with higher accuracy. can do.
- the movable unit 180 is controlled to linearly move the image sensor holder 116 on which the image sensor 108 is mounted in the tilting direction rotation axis 11 direction and the panning direction rotation axis 12 direction, and rolling about the optical axis 10. Control for rotating the image sensor holder 116 in the direction 22 is executed based on the result of image processing of the image output signal from the image sensor 108.
- the arithmetic processing unit 94 estimates, for example, a point spread function (PSF) in the image based on the output signal from the image processing unit 1000.
- PSF indicates the amount of blur in the image.
- the arithmetic processing unit 94 controls the image sensor driving unit 99 so as to reduce the blur amount by feedback control based on the image processing signal.
- the image sensor driving unit 99 drives the image sensor holder 116 under the control of the arithmetic processing unit 94.
- the camera driving device 165 and the camera unit 170 according to the embodiment of the present invention can rotate the camera unit 100 at a larger angle than the conventional camera shake correction device. For this reason, it is also possible to realize a camera driving device that can track an object using image processing or the like so that the specified object in the image is positioned at the center of the screen, for example.
- a camera driving device capable of performing super-wide-angle shooting of still images and moving images by performing shooting while rotating the camera unit 100 in the panning direction 20 or the tilting direction 21 and sequentially synthesizing the captured still images and moving images. Can be realized.
- the rolling direction 22 can be corrected in units of pixels.
- the image sensor 108 is rotated around the optical axis, thereby microscopically correcting the minute rotational shake of the remaining image. be able to.
- a camera driving device that obtains a high-quality image can be provided.
- the camera driving device 165 and the camera unit 170 provided with the camera unit 100 have been described.
- the embodiment of the present invention includes a light emitting device and a light receiving device other than the camera unit 100.
- the present invention can also be applied to a drive device that can be freely driven in three axial directions.
- a laser device or a light detection element may be mounted on the movable unit 180 to realize a drive device that can be freely driven in three axial directions.
- the configuration of the drive system can be changed as appropriate according to design specifications and the like. For example, if the rotation in the rolling direction is unnecessary, the rolling drive unit may not be provided, and if the rotation in the tilting direction 21 is not required, the tilting drive unit may not be provided.
- panning, tilting, and rolling drive magnets are used as the attracting magnet
- panning, tilting, and rolling magnetic yokes are used as the magnetic bodies.
- the camera driving device 165 may include a magnet and a magnetic body other than the driving magnet and the magnetic yoke as the attracting magnet and the magnetic body.
- the camera driving device 165 disclosed in the present application has a structure that can be driven in a panning direction, a tilting direction, a rolling direction, and an optical axis direction. These configurations can be suitably used for various imaging apparatuses that require image shake correction, such as wearable cameras. It is also suitable for high-speed tracking cameras, surveillance cameras, and in-vehicle cameras that require high-speed panning, tilting, and rolling operations. It is also suitable for video cameras that can perform ultra-wide-angle shooting.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Engineering & Computer Science (AREA)
- Studio Devices (AREA)
- Adjustment Of Camera Lenses (AREA)
- Accessories Of Cameras (AREA)
Abstract
Description
以下、本発明によるカメラ駆動装置の第1の実施形態を説明する。
以下、本発明によるカメラ駆動装置の第2の実施形態を説明する。
以下、本発明によるカメラ駆動装置の第3の実施形態を説明する。
11 チルティング方向回転軸
12 パンニング方向回転軸
20 パンニング方向
21 チルティング方向
22 ローリング方向
40、41、42、43 巻回中心軸
55 支持ボール
56 支持ボールホルダー
70 球心
80p、80r、80t 角速度信号
82p、82r、82t 角速度信号
83p、83r、83t 角速度信号
84p、84r、84t 目標回転角度信号
85p、85r、85t 目標角度信号
86p、86r、86t 回転角度信号
87p、87r、87t 回転角度信号
88p、88r、88t 回転角度信号
91p、91r、91t アナログ回路
92p、92r、92t 増幅回路
93p、93r、93t 変換器
94 演算処理部
95p、95r、95t 変換器
96p、96r、96t 駆動回路
97p、97r、97t アナログ回路
98p、98r、98t 増幅回路
99 撮像素子駆動部
100 カメラ部
101 レンズ部
102 下部可動部
102B 平面部
102H 開口部
102P 接触ポイント
102R 凸状部分球面
102S 切り欠き部
105 レンズ
106 レンズホルダー
107 カメラ鏡筒
108 撮像素子
110 配線
116 撮像素子ホルダー
116A 平面部
117、118 撮像素子駆動コイル
119 第3の磁気センサー
120 第1の固定ホルダ
120A 傾斜面
121 磁性部材
122 支持球体
123 撮像素子回転駆動コイル
130 第2の固定ホルダ
150 カメラカバー
160 可動ユニット
165 カメラ駆動装置
170 カメラユニット
180 可動ユニット
200 ベース
200A 凹状円錐面
200A 凹状球面
200B 接触面
200C 接触面
200F 円柱凹部
200H、200P、200T 開口部
201 脱落防止部材
201A 脱落防止用規制面
203 パンニング磁気ヨーク
204 チルティング磁気ヨーク
300 固定ユニット
301 パンニング駆動コイル
302 チルティング駆動コイル
303 ローリング駆動コイル
401 パンニング駆動磁石
401A 内側曲面
402 チルティング駆動磁石
406 傾斜検出用磁石
501 第1の磁気センサー
501 第2の磁気センサー
502 回路基板
600 圧縮バネ
700 第2の磁気センサー
800 制御部
900、901、902 角速度センサー
1000 画像処理部
Claims (41)
- 撮像面を有する撮像素子、光軸を有し、前記撮像面に被写体像を形成するレンズおよび前記レンズを保持するレンズ鏡筒を含むカメラ部と、
少なくとも1つの吸着用磁石を有し、前記カメラ部を内蔵する可動ユニットであって、第1の凸状部分球面を外形に有する可動ユニットと、
少なくとも1つの磁性体および前記可動ユニットの少なくとも一部が遊嵌する凹部を有し、前記少なくとも1つの吸着用磁石の前記少なくとも1つの磁性体に対する磁気吸引力によって、前記可動ユニットの前記第1の凸状部分球面と前記凹部とが点または線接触し、前記可動ユニットが前記第1の凸状部分球面の球心を中心として自在に回転する固定ユニットと、
前記固定ユニットに対して前記カメラ部をパンニング方向へ傾斜させるパンニング駆動部と、
前記固定ユニットに対して前記カメラ部を前記パンニング方向と直交するチルティング方向へ傾斜させるチルティング駆動部と、
前記固定ユニットに対して前記カメラ部を前記レンズの前記光軸を中心とするローリング方向へ回転させるローリング駆動部と、
前記可動ユニットに対して前記撮像素子を前記パンニング方向の回転軸であるパンニング回転軸の方向と前記チルティング方向の回転軸であるチルティング回転軸の方向とへ移動させる撮像素子駆動部と、
前記固定ユニットに対する前記カメラ部の前記パンニング方向および前記チルティング方向への傾斜角度を検出する第1の検出器と、
前記ローリング方向に回転する前記カメラ部の回転角度を検出する第2の検出器と、
前記パンニング回転軸の方向と前記チルティング回転軸の方向とに移動する前記撮像素子の移動量を検出する第3の検出器と
を備えた、カメラ駆動装置。 - 撮像面を有する撮像素子、光軸を有し、前記撮像面に被写体像を形成するレンズおよび前記レンズを保持するレンズ鏡筒を含むカメラ部と、
少なくとも1つの吸着用磁石を有し、前記カメラ部を内蔵する可動ユニットであって、第1の凸状部分球面を外形に有する可動ユニットと、
少なくとも1つの磁性体および前記可動ユニットの少なくとも一部が遊嵌する凹部を有し、前記少なくとも1つの吸着用磁石の前記少なくとも1つの磁性体に対する磁気吸引力によって、前記可動ユニットの前記第1の凸状部分球面と前記凹部とが点または線接触し、前記可動ユニットが前記第1の凸状部分球面の球心を中心として自在に回転する固定ユニットと、
前記固定ユニットに対して前記カメラ部をパンニング方向へ傾斜させるパンニング駆動部と、
前記固定ユニットに対して前記カメラ部を前記パンニング方向と直交するチルティング方向へ傾斜させるチルティング駆動部と、
前記固定ユニットに対して前記カメラ部を前記レンズの前記光軸を中心とするローリング方向へ回転させるローリング駆動部と、
前記可動ユニットに対して前記撮像素子を、前記パンニング方向の回転軸であるパンニング回転軸の方向と前記チルティング方向の回転軸であるチルティング回転軸の方向とへ移動させ、かつ前記ローリング方向へ回転させる撮像素子駆動部と、
前記固定ユニットに対する前記カメラ部の前記パンニング方向および前記チルティング方向への傾斜角度を検出する第1の検出器と、
前記ローリング方向に回転する前記カメラ部の回転角度を検出する第2の検出器と、
前記パンニング回転軸の方向と前記チルティング回転軸の方向とに移動する前記撮像素子の移動量を検出する第3の検出器と
を備えた、カメラ駆動装置。 - 前記固定ユニットは、前記凹部内に位置する少なくとも3つの第2の凸状部分球面を有し、前記第2の凸状部分球面と前記可動ユニットの第1の凸状部分球面とが点接触している、請求項1または2に記載のカメラ駆動装置。
- 前記固定ユニットは、前記凹部の内側面を構成する凹状円錐面を有し、前記凹状円錐面と前記可動ユニットの第1の凸状部分球面とが線接触している、請求項1または2に記載のカメラ駆動装置。
- 前記固定ユニットに設けられ、前記可動ユニットが前記固定ユニットから脱落しないように前記可動ユニットの移動を制限する規制面を有する脱落防止部材をさらに備え、
前記規制面は、前記第1の凸状部分球面の球心と一致した中心を有する凹状部分球面を有する、請求項1から4のいずれかに記載のカメラ駆動装置。 - 前記パンニング駆動部は、前記可動ユニットにおいて、前記光軸に対して対称に配置された一対のパンニング駆動磁石と、前記一対のパンニング駆動磁石に対向するよう前記固定ユニットに配置された一対のパンニング磁気ヨークと、前記一対のパンニング磁気ヨークに巻回された一対のパンニング駆動コイルとを含み、
前記チルティング駆動部は、前記可動ユニットにおいて、前記光軸に対して対称に配置された一対のチルティング駆動磁石と、前記一対のチルティング駆動磁石に対向するように前記固定ユニットに配置された一対のチルティング磁気ヨークと、前記一対のチルティング磁気ヨークに巻回された一対のチルティング駆動コイルとを含み、
前記一対のパンニング駆動磁石および前記一対のパンニング駆動コイルは、前記第1の凸状部分球面の球心を通る直線上に設けられ、前記一対のチルティング駆動磁石および前記一対のチルティング駆動コイルは、前記第1の凸状部分球面の球心を通る他の直線上に設けられ、前記可動ユニットの光軸方向における中心の位置は、前記第1の凸状部分球面の球心の位置とほぼ一致している、請求項1から5のいずれかに記載のカメラ駆動装置。 - 前記ローリング駆動部は、前記一対の前記パンニング磁気ヨークおよび前記一対のチルティング磁気ヨークにそれぞれ巻回された4つのローリング駆動コイルを含み、前記一対のパンニング駆動磁石および前記一対のチルティング駆動磁石をローリング駆動磁石として用いる、請求項6に記載のカメラ駆動装置。
- 前記少なくとも1つの磁性体は、前記一対のパンニング磁気ヨークおよび前記一対のチルティング磁気ヨークである、請求項6に記載のカメラ駆動装置。
- 前記少なくとも1つの吸着用磁石は、前記一対のパンニング駆動磁石および前記一対のチルティング駆動磁石である、請求項6に記載のカメラ駆動装置。
- 前記一対のパンニング駆動コイルおよび前記一対のチルティング駆動コイルのそれぞれの巻回中心軸と垂直であり、前記第1の凸状部分球面の球心およびそれぞれの駆動コイルを通る直線は、前記光軸に垂直であり且つ前記第1の凸状部分球面の球心を通る水平面に対して、45度以下の傾斜角度Aをなしており、前記一対のパンニング駆動磁石および前記一対のチルティング駆動磁石は、前記一対のパンニング駆動コイルおよび前記一対のチルティング駆動コイルに対向するように前記可動ユニットに傾斜して配置されている、請求項6または7に記載のカメラ駆動装置。
- 前記一対のローリング駆動コイルのそれぞれの巻回中心軸と垂直であり、前記第1の凸状部分球面の球心を通る直線は、前記光軸に垂直であり且つ前記第1の凸状部分球面の球心およびそれぞれのローリング駆動コイルの中心を通る水平面に対して、45度以下の傾斜角度Bをなしており、前記ローリング駆動部は、一対のローリング駆動磁石を含み、前記一対のローリング駆動磁石は、前記ローリング駆動コイルに対向するよう前記可動ユニットに傾斜して配置されている、請求項6に記載のカメラ駆動装置。
- 前記傾斜角度Aは20度である、請求項10に記載のカメラ駆動装置。
- 前記傾斜角度Bは20度である、請求項11に記載のカメラ駆動装置。
- 前記第2の凸状部分球面の各々の球心と前記第1の凸状部分球面の球心とを結ぶ直線は、前記光軸に垂直であり且つ前記第1の凸状部分球面の球心を通る水平面に対して、45度の傾斜角度Cをなしている、請求項3に記載のカメラ駆動装置。
- 前記一対のパンニング駆動磁石、前記一対のチルティング駆動磁石および前記一対のローリング駆動磁石は、前記可動ユニットの内側に位置しており、前記第1の凸状部分球面において露出していない、請求項7に記載のカメラ駆動装置。
- 前記一対のパンニング駆動コイル、前記一対のチルティング駆動コイルおよび前記ローリング駆動コイルは、前記固定ユニットの内側に設けられ、前記凹部内において露出していない、請求項7に記載のカメラ駆動装置。
- 前記可動ユニットは、樹脂材料によって構成されている、請求項15に記載のカメラ駆動装置。
- 前記可動ユニットは、前記一対のパンニング駆動磁石、前記一対のチルティング駆動磁石および前記一対のローリング駆動磁石とともに一体成型されている、請求項15に記載のカメラ駆動装置。
- 前記固定ユニットは、樹脂材料によって構成されている、請求項16に記載のカメラ駆動装置。
- 前記固定ユニットは、前記一対のパンニング駆動コイル、前記一対のチルティング駆動コイル、前記ローリング駆動コイル、前記一対のパンニング磁気ヨーク、前記一対のチルティング磁気ヨークおよび一対のローリング磁気ヨークとともに一体成型されている、請求項19に記載のカメラ駆動装置。
- 前記第1の検出器は、前記固定ユニットに固定された第1の磁気センサーと、前記可動ユニットに設けられた傾斜検出用磁石とを含み、
前記第1の磁気センサーは、前記傾斜検出用磁石の傾斜による磁力変化を検出し、前記カメラ部の前記パンニング方向および前記チルティング方向の2次元の傾斜角度を算出する、請求項1または2に記載のカメラ駆動装置。 - 前記第1の磁気センサーおよび前記傾斜検出用磁石は、前記光軸上に位置している、請求項21に記載のカメラ駆動装置。
- 前記第1の検出器は、前記固定ユニットに固定された光センサーと、前記可動ユニットの前記第1の凸状部分球面の一部に設けられた光検出パターンとを含み、
前記光センサーは、前記光検出パターンの傾斜による前記光センサーに入射する光の変化を検出し、前記カメラ部の前記パンニング方向および前記チルティング方向の2次元の傾斜角度を算出する、請求項1または2に記載のカメラ駆動装置。 - 前記撮像素子駆動部は、
前記撮像素子を搭載する撮像素子ホルダー部と、
前記撮像素子ホルダー部を、前記光軸に垂直な平面において前記可動ユニットに対して移動可能に支持する支持手段と、
前記光軸に平行な巻回中心軸を有し、前記撮像素子ホルダー部に固定された撮像素子駆動コイルと、
前記撮像素子駆動コイルに対向するように前記可動ユニットに固定された撮像素子駆動磁石と
を含む、請求項1および請求項3から5のいずれかに記載のカメラ駆動装置。 - 前記撮像素子駆動部は、
前記撮像素子を搭載する撮像素子ホルダー部と、
前記撮像素子ホルダー部を、前記光軸に垂直な平面において前記可動ユニットに対して移動可能に支持する支持手段と、
前記光軸に平行な巻回中心軸を有し、前記撮像素子ホルダー部に固定された第1の撮像素子駆動コイルと、
前記第1の撮像素子駆動コイルに対向するように前記可動ユニットに固定された第1の撮像素子駆動磁石と、
前記光軸に対して傾斜した巻回中心軸を有し、前記撮像素子ホルダー部に固定された第2の撮像素子駆動コイルと、
前記第2の撮像素子駆動コイルに対向するように前記可動ユニットに固定された第2の撮像素子駆動磁石と
を含む、請求項2から5のいずれかに記載のカメラ駆動装置。 - 前記第1の検出器は、前記固定ユニットに固定された第1の磁気センサーと、前記可動ユニットに設けられた傾斜検出用磁石とを含み、
前記第1の磁気センサーは、前記傾斜検出用磁石の傾斜による磁力変化を検出し、前記カメラ部の前記パンニング方向および前記チルティング方向の2次元の傾斜角度を算出し、
前記撮像素子駆動磁石は、前記傾斜検出用磁石である、請求項24に記載のカメラ駆動装置。 - 前記第1の検出器は、前記固定ユニットに固定された第1の磁気センサーと、前記可動ユニットに設けられた傾斜検出用磁石とを含み、
前記第1の磁気センサーは、前記傾斜検出用磁石の傾斜による磁力変化を検出し、前記カメラ部の前記パンニング方向および前記チルティング方向の2次元の傾斜角度を算出し、
前記第1の撮像素子駆動磁石は、前記傾斜検出用磁石である、請求項25に記載のカメラ駆動装置。 - 前記第2の撮像素子駆動磁石は、前記パンニング方向への前記可動ユニットの駆動に用いられるパンニング駆動磁石または前記チルティング方向への前記可動ユニットの駆動に用いられるチルティング駆動磁石である、請求項25に記載のカメラ駆動装置。
- 前記支持手段は、
前記撮像素子ホルダー部に設けられた、前記光軸に垂直な平面を有する第1の平面部と、
前記可動ユニットに設けられた、前記光軸に垂直な平面を有する第2の平面部と、
前記第1の平面部と前記第2の平面部とに狭持された少なくとも3個の支持球体と
を含む、請求項24または25に記載のカメラ駆動装置。 - 前記撮像素子ホルダー部は磁性体を含み、前記磁性体および前記撮像素子駆動磁石間の磁気吸引力により前記支持球体を狭持する、請求項29に記載のカメラ駆動装置。
- 前記撮像素子ホルダー部は磁性体を含み、前記磁性体および前記第1の撮像素子駆動磁石間の磁気吸引力により前記支持球体を狭持する、請求項29に記載のカメラ駆動装置。
- 前記可動ユニットの重心は前記第1の凸状部分球面の球心と一致している、請求項1から5のいずれかに記載のカメラ駆動装置。
- 前記カメラ部に接続され、フレキシブルケーブルによって構成された配線をさらに備え、
前記配線は、前記光軸に対して線対称に配置されており、前記光軸に垂直な平面において、前記一対のチルティング駆動磁石を結ぶ線または前記一対のパンニング駆動磁石を結ぶ線に対して45度をなす方向において、前記可動ユニットに固定されている、請求項6に記載のカメラ駆動装置。 - 前記第2の検出器は、前記固定ユニットに固定された第2の磁気センサーと、前記可動ユニットに設けられた回転検出用磁石とを含み、
前記第2の磁気センサーは、前記回転検出用磁石の回転による磁力変化を検出し、前記可動ユニットの前記ローリング方向の回転角度を算出する、請求項1または2に記載のカメラ駆動装置。 - 前記回転検出用磁石は前記パンニング方向への前記可動ユニットの駆動に用いられるパンニング駆動磁石または前記チルティング方向への前記可動ユニットの駆動に用いられるチルティング駆動磁石である、請求項34に記載のカメラ駆動装置。
- 前記撮像素子駆動部は、前記撮像素子を搭載する撮像素子ホルダー部を含み、
前記第3の検出器は、前記撮像素子ホルダー部に固定された第3の磁気センサーと、前記可動ユニットに設けられた移動検出用磁石とを含み、
前記第3の磁気センサーは、前記撮像素子ホルダー部の移動による磁力変化を検出し、前記撮像素子駆動部の前記パンニング回転軸の方向と前記チルティング回転軸の方向との移動量を算出する、請求項1または2に記載のカメラ駆動装置。 - 前記第1の検出器は、前記固定ユニットに固定された第1の磁気センサーと、前記可動ユニットに設けられた傾斜検出用磁石とを含み、
前記第1の磁気センサーは、前記傾斜検出用磁石の傾斜による磁力変化を検出し、前記カメラ部の前記パンニング方向および前記チルティング方向の2次元の傾斜角度を算出し、
前記移動検出用磁石は、前記傾斜検出用磁石である、請求項36に記載のカメラ駆動装置。 - 前記脱落防止部材の前記規制面と前記可動ユニットの前記第1の凸状部分球面との間に空隙が設けられており、前記可動ユニットの前記第1の凸状部分球面が前記固定ユニットの前記凹部から離間しても、前記磁気吸引力によって、点または線接触の状態に戻るように前記空隙は決定されている、請求項5に記載のカメラ駆動装置。
- 請求項1から38のいずれかに規定されるカメラ駆動装置と、
前記固定ユニットの直交する3軸周りの角速度をそれぞれ検出する角速度センサーと、
前記角速度センサーからの出力に基づき、目標回転角度信号を生成する演算処理部と、
前記目標回転角度信号に基づき、前記第1の駆動部および前記第2の駆動部を駆動する信号を生成する駆動回路と
を備えた、カメラユニット。 - 前記カメラ部の前記光軸を中心に45°回転させた請求項1から38のいずれかに規定されるカメラ駆動装置と、
前記固定ユニットの直交する3軸周りの角速度をそれぞれ検出する角速度センサーと、
前記角速度センサーからの出力に基づき、目標回転角度信号を生成する演算処理部と、
前記目標回転角度信号に基づき、前記第1の駆動部および前記第2の駆動部を駆動する信号を生成する駆動回路と
を備えた、カメラユニット。 - 光軸を有し、光を受光または発光する光デバイスと、
少なくとも1つの吸着用磁石を有し、前記光デバイスを内蔵する可動ユニットであって、第1の凸状部分球面を外形に有する可動ユニットと、
少なくとも1つの磁性体および前記可動ユニットの少なくとも一部が遊嵌する凹部を有し、前記少なくとも1つの吸着用磁石の前記少なくとも1つの磁性体に対する磁気吸引力によって、前記可動ユニットの前記第1の凸状部分球面と前記凹部とが点または線接触し、前記可動ユニットが前記第1の凸状部分球面の球心を中心として自在に回動する固定ユニットと、
前記固定ユニットに対して前記光デバイスをパンニング方向へ傾斜させるパンニング駆動部と、
前記固定ユニットに対して前記光デバイスを前記パンニング方向と直交するチルティング方向へ傾斜させるチルティング駆動部と、
前記固定ユニットに対する前記可動ユニットの前記パンニング方向および前記チルティング方向への傾斜角度を検出する検出器と
を備えた、光デバイス駆動装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/372,275 US9225899B2 (en) | 2012-11-16 | 2013-11-14 | Camera drive device |
JP2014546878A JP6148680B2 (ja) | 2012-11-16 | 2013-11-14 | カメラ駆動装置 |
CN201380005721.5A CN104136986B (zh) | 2012-11-16 | 2013-11-14 | 相机驱动装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012-252343 | 2012-11-16 | ||
JP2012252343 | 2012-11-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014076958A1 true WO2014076958A1 (ja) | 2014-05-22 |
Family
ID=50730889
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/006707 WO2014076958A1 (ja) | 2012-11-16 | 2013-11-14 | カメラ駆動装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US9225899B2 (ja) |
JP (1) | JP6148680B2 (ja) |
CN (1) | CN104136986B (ja) |
WO (1) | WO2014076958A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019044489A1 (ja) * | 2017-08-28 | 2019-03-07 | キヤノン株式会社 | 駆動装置および撮像装置の制御方法 |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014076959A1 (ja) * | 2012-11-16 | 2014-05-22 | パナソニック株式会社 | カメラ駆動装置 |
US9674450B2 (en) * | 2014-03-31 | 2017-06-06 | Avigilon Corporation | Security camera with adjustable lens aiming mechanism |
JP6399799B2 (ja) * | 2014-05-12 | 2018-10-03 | キヤノン株式会社 | 光学機器および撮像装置 |
JP6659035B2 (ja) * | 2015-09-30 | 2020-03-04 | Necエンベデッドプロダクツ株式会社 | 多方向駆動装置及び自動カメラ |
KR102348365B1 (ko) * | 2016-05-03 | 2022-01-10 | 삼성전자주식회사 | 카메라 모듈을 포함하는 전자 장치 |
JP6765064B2 (ja) | 2016-06-23 | 2020-10-07 | パナソニックIpマネジメント株式会社 | 赤外線検出装置 |
US10495518B2 (en) * | 2016-06-23 | 2019-12-03 | Panasonic Intellectual Property Management Co., Ltd. | Infrared detection apparatus |
CN106101556B (zh) * | 2016-07-29 | 2017-10-20 | 广东欧珀移动通信有限公司 | 移动终端的图像合成方法、装置及移动终端 |
WO2018066775A2 (ko) * | 2016-10-05 | 2018-04-12 | 자화전자 주식회사 | Ois를 위한 반사계 구동장치 |
US10712580B2 (en) * | 2016-10-27 | 2020-07-14 | Tdk Taiwan Corp. | Driving mechanism and camera module |
CN207181912U (zh) * | 2016-10-27 | 2018-04-03 | 台湾东电化股份有限公司 | 驱动机构和摄像装置 |
US10678062B2 (en) | 2017-02-08 | 2020-06-09 | Samsung Electro-Mechanics Co., Ltd. | Reflecting module for optical image stabilization (OIS) and camera module including the same |
KR102166942B1 (ko) * | 2017-02-20 | 2020-10-16 | 자화전자(주) | 다축 구조의 ois용 반사계 구동장치 |
CN110998430B (zh) * | 2017-08-10 | 2022-02-22 | 索尼公司 | 相机抖动校正装置 |
KR102609149B1 (ko) * | 2018-10-15 | 2023-12-05 | 삼성전기주식회사 | 카메라 모듈의 제조 방법 |
KR102357533B1 (ko) * | 2019-04-30 | 2022-02-04 | 삼성전기주식회사 | 카메라 모듈 |
CN110933270B (zh) * | 2019-11-25 | 2021-08-06 | 天津津航技术物理研究所 | 一种六自由度精密调整成像芯片组件结构 |
KR20210100430A (ko) * | 2020-02-06 | 2021-08-17 | 엘지이노텍 주식회사 | 카메라 장치 |
JP2022057274A (ja) | 2020-09-30 | 2022-04-11 | 日本電産株式会社 | 光学ユニット |
JP2022057347A (ja) | 2020-09-30 | 2022-04-11 | 日本電産株式会社 | 光学ユニット |
CN113873164B (zh) * | 2021-10-22 | 2024-06-11 | 维沃移动通信有限公司 | 摄像头组件及电子设备 |
CN114025067A (zh) * | 2021-11-05 | 2022-02-08 | 昆山联滔电子有限公司 | 摄像装置 |
CN117329467B (zh) * | 2023-12-01 | 2024-02-02 | 恒太工业科技(深圳)股份有限公司 | 一种cob灯带及带有该灯带的照明设备 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003241298A (ja) * | 2002-02-14 | 2003-08-27 | Canon Inc | 撮像装置 |
WO2012004952A1 (ja) * | 2010-07-07 | 2012-01-12 | パナソニック株式会社 | カメラ駆動装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200187391Y1 (ko) | 1997-10-10 | 2000-07-01 | 윤종용 | 마그네트를이용한비디오카메라의손떨림보정장치 |
JP3952049B2 (ja) | 2004-08-12 | 2007-08-01 | コニカミノルタフォトイメージング株式会社 | 振れ補正機構及びこれを用いた撮像装置 |
JP2007033740A (ja) * | 2005-07-26 | 2007-02-08 | Olympus Imaging Corp | 手振れ補正機能付きカメラシステム |
JP2008058391A (ja) * | 2006-08-29 | 2008-03-13 | Samsung Yokohama Research Institute Co Ltd | 撮像レンズユニットおよび撮像装置 |
WO2010010712A1 (ja) * | 2008-07-24 | 2010-01-28 | パナソニック株式会社 | カメラ駆動装置 |
CN102472945B (zh) * | 2010-06-09 | 2015-05-27 | 松下电器(美国)知识产权公司 | 相机驱动装置 |
WO2012004994A1 (ja) * | 2010-07-07 | 2012-01-12 | パナソニック株式会社 | カメラ駆動装置 |
CN104081271B (zh) * | 2012-11-16 | 2018-09-11 | 松下电器(美国)知识产权公司 | 相机驱动装置 |
-
2013
- 2013-11-14 CN CN201380005721.5A patent/CN104136986B/zh active Active
- 2013-11-14 WO PCT/JP2013/006707 patent/WO2014076958A1/ja active Application Filing
- 2013-11-14 US US14/372,275 patent/US9225899B2/en active Active
- 2013-11-14 JP JP2014546878A patent/JP6148680B2/ja active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003241298A (ja) * | 2002-02-14 | 2003-08-27 | Canon Inc | 撮像装置 |
WO2012004952A1 (ja) * | 2010-07-07 | 2012-01-12 | パナソニック株式会社 | カメラ駆動装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019044489A1 (ja) * | 2017-08-28 | 2019-03-07 | キヤノン株式会社 | 駆動装置および撮像装置の制御方法 |
US11719906B2 (en) | 2017-08-28 | 2023-08-08 | Canon Kabushiki Kaisha | Driving apparatus |
Also Published As
Publication number | Publication date |
---|---|
US9225899B2 (en) | 2015-12-29 |
CN104136986A (zh) | 2014-11-05 |
JPWO2014076958A1 (ja) | 2017-01-05 |
US20140354833A1 (en) | 2014-12-04 |
CN104136986B (zh) | 2017-12-29 |
JP6148680B2 (ja) | 2017-06-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6148680B2 (ja) | カメラ駆動装置 | |
JP6152386B2 (ja) | カメラ駆動装置 | |
JP6195574B2 (ja) | カメラ駆動装置 | |
JP6030573B2 (ja) | カメラ駆動装置 | |
JP5802192B2 (ja) | カメラ駆動装置 | |
JP5096496B2 (ja) | カメラ駆動装置 | |
JP5689465B2 (ja) | カメラ駆動装置 | |
US20170371232A1 (en) | Anti-shake compensation structure for auto-focus | |
US7742691B2 (en) | Image stabilizer, lens device and imager apparatus | |
US8780264B2 (en) | Camera drive device | |
JP5259851B1 (ja) | 位置制御装置 | |
JP2021535443A (ja) | カメラモジュール | |
WO2019037159A1 (zh) | 一种整合相机模组的防抖微型云台 | |
WO2020243989A1 (zh) | 一种微型防抖云台以及相机模组 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ENP | Entry into the national phase |
Ref document number: 2014546878 Country of ref document: JP Kind code of ref document: A |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13855871 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14372275 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 13855871 Country of ref document: EP Kind code of ref document: A1 |