WO2006054570A1 - 撮像素子駆動装置ならびにそれを用いた撮影装置および監視カメラ装置 - Google Patents
撮像素子駆動装置ならびにそれを用いた撮影装置および監視カメラ装置 Download PDFInfo
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- WO2006054570A1 WO2006054570A1 PCT/JP2005/020998 JP2005020998W WO2006054570A1 WO 2006054570 A1 WO2006054570 A1 WO 2006054570A1 JP 2005020998 W JP2005020998 W JP 2005020998W WO 2006054570 A1 WO2006054570 A1 WO 2006054570A1
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- Prior art keywords
- unit
- image sensor
- movable
- driving device
- support
- Prior art date
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- 238000012544 monitoring process Methods 0.000 title claims description 10
- 230000003287 optical effect Effects 0.000 claims abstract description 89
- 238000003384 imaging method Methods 0.000 claims description 86
- 230000003014 reinforcing effect Effects 0.000 claims description 22
- 238000001514 detection method Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 23
- 238000006243 chemical reaction Methods 0.000 description 15
- 238000003825 pressing Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
-
- 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
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
-
- 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
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
-
- 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
- H04N23/10—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths
- H04N23/11—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths for generating image signals from visible and infrared light wavelengths
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/20—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from infrared radiation only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/30—Transforming light or analogous information into electric information
- H04N5/33—Transforming infrared radiation
Definitions
- Imaging device driving device and photographing device and surveillance camera device using the same
- the present invention relates to an imaging device such as a monitoring camera device or a video camera device, and more particularly to an imaging device driving device for moving an imaging element in the optical axis direction of a lens, and an imaging device and a monitoring camera using the imaging device Relates to the device.
- the optical path length differs depending on the presence or absence of an infrared light cut filter when photographing using visible light and photographing using infrared light. For example, when shooting including infrared light at night with a configuration optimized for the optical path length when shooting with visible light in the daytime, the shot video is blurred. There was a problem that it ended up
- a lead screw is used to move the image sensor, and the image sensor is attached to a nut portion that is rotatable with respect to the lead screw.
- the lead screw is rotated by a stepping motor.
- the image sensor is moved by the rotation of the lead screw with respect to the nut portion to which the image sensor is fixed. For this reason, there is inevitably mechanical rattling between the nut and the lead screw. Therefore, especially when you want to drive a very small distance, the rattling causes the rotation of the lead screw. There is a problem that the linearity of the moving distance of the image sensor becomes low and the driving accuracy becomes low.
- the present invention has been made in view of such problems. Even when it is desired to drive a minute distance, the drive accuracy is high !, an image sensor driving device, and an imaging device using the same. A surveillance camera device is provided.
- the imaging element driving device of the present invention includes a base portion whose position is fixed with respect to the lens portion, a movable portion provided so as to face the base portion, and an imaging surface orthogonal to the optical axis direction.
- the image sensor attached to the movable part in a state of being mounted, the first support part and the second support part provided between the base part and the movable part and supporting the movable part, the base part and the first part Provided at a position parallel to the optical axis direction from the first rotating part between the first rotating part provided between the supporting part and the base part and the second supporting part.
- the second rotating part, the third rotating part provided between the movable part and the first supporting part, and the first rotating part between the movable part and the second supporting part The position of the imaging device relative to the lens unit and the fourth rotating unit provided at a position that forms the apex of the parallelogram with respect to the second rotating unit and the third rotating unit are changed. And a rotation center axis of each of the first rotation unit, the second rotation unit, the third rotation unit, and the fourth rotation unit with respect to the optical axis direction.
- the first rotation unit, the second rotation unit, the third rotation unit, and the fourth rotation unit are parallel to each other by the drive of the drive unit. In this state, the position of the image sensor with respect to the lens unit changes.
- each of the movable parts has a rotation center axis orthogonal to the optical axis direction.
- the imaging surface of the movable part is orthogonal to the optical axis direction.
- the first support portion is rotatably connected to the base portion by the first plurality of points, and is rotatably connected to the movable portion by the second plurality of points.
- the second plurality of points are configured to maintain a flat surface
- the second support portion is rotatably connected to the movable portion and the base portion
- the first rotation portion is configured to support the base portion and the first support.
- the portion may be connected to the first plurality of points
- the third rotating portion may be configured to connect the movable portion and the first support portion at the second plurality of points.
- the first support portion further holds the base portion and the movable portion by a plurality of points, and the plurality of points are held so as to be positioned on a plane. Therefore, it is possible to prevent a three-dimensional twist from occurring when the position of the image sensor in the optical axis direction is changed, and it is possible to prevent the occurrence of an inclination error of the image pickup surface (a loose surface shake).
- At least one of the first rotating unit, the second rotating unit, the third rotating unit, and the fourth rotating unit may be a leaf spring unit! /.
- first rotation unit, the second rotation unit, the third rotation unit, and the fourth rotation unit may be configured as leaf springs, respectively.
- the movable part, the first support part, the second support part and the leaf spring part are integrally formed, At least one of the movable part, the first support part, and the second support part may have a reinforcing part that increases rigidity.
- the second support portion and the leaf spring portion can be created, a simple configuration can be realized, and at least one of the movable portion, the first support portion, and the second support portion has a reinforcing portion. A configuration having the necessary rigidity can be realized.
- At least one of the first rotating unit, the second rotating unit, the third rotating unit, and the fourth rotating unit may be a hinge unit! / ,.
- first rotating unit, the second rotating unit, the third rotating unit, and the fourth rotating unit may be configured as hinges, respectively.
- the mechanical strength can be further increased by being a hinge portion in the rotating portion to which each member is connected, so that the most shock resistant property is achieved. It is possible to realize an excellent configuration.
- an elastic part may be provided between the first support part and the second support part.
- an urging portion that urges the movable portion in a predetermined direction
- the drive portion is configured to drive the movable portion by reducing the urging force urged to the movable portion by the urging portion. May be.
- the movable portion is further biased in a predetermined direction, so that the impact resistance is excellent and the occurrence of hysteresis can be further suppressed. Can be realized.
- the imaging device of the present invention is a video that performs video signal processing on the signal output from the lens unit, the imaging device driving device of the present invention, and the imaging device of the imaging device driving device. And a signal processing unit.
- each of the movable parts is provided at the position of the apex of a parallelogram whose respective rotation center axes are orthogonal to the optical axis direction and whose one side is parallel to the optical axis direction. Since it is held via two rotating parts, the imaging surface is perpendicular to the optical axis direction of the lens unit with a simple configuration in which an imaging element with the imaging surface orthogonal to the optical axis is attached to the movable part.
- the image sensor can be moved in the optical axis direction of the lens part while maintaining the condition, the possibility of mechanical rattling such as using a lead screw and a nut part is reduced. Therefore, even when it is desired to drive a minute distance, it is possible to realize an imaging device capable of taking a sharp image and equipped with an imaging device driving device with high driving accuracy.
- a positional deviation amount calculation unit that calculates a positional deviation amount in a direction perpendicular to the optical axis direction of the imaging element, and a direction perpendicular to the optical axis direction of the imaging element calculated by the positional deviation amount calculation unit.
- the image processing apparatus may include a correction unit that corrects the video signal processed by the video signal processing unit based on the amount of displacement.
- an imaging device capable of correcting the movement of the image sensor in the direction perpendicular to the optical axis direction by mounting the image sensor driving device of the present invention is realized. can do.
- the surveillance camera device of the present invention includes a lens unit, an image sensor driving device of the present invention, an illuminance change detection unit that detects an illumination change, and an illuminance change detected by the illuminance change detection unit.
- a filter unit that attaches / detaches the infrared light cut filter on the optical axis of the lens unit, and a control unit that drives the drive unit of the image sensor driving device when the infrared light cut filter of the filter unit is attached / detached. It is characterized by that.
- the imaging surface is oriented in the optical axis direction of the lens unit by a simple configuration in which the imaging element is attached to the movable unit movable in the optical axis direction of the lens unit with respect to the surface of the base unit.
- the image sensor can be moved in the direction of the optical axis of the lens unit while maintaining the vertical position, thus reducing the possibility of mechanical rattling such as using a lead screw and a nut unit. Therefore, even when it is desired to drive a minute distance, it is possible to realize a surveillance camera device that can perform photographing regardless of the surrounding brightness with high driving accuracy of the image sensor.
- FIG. 1 is a diagram showing a configuration of a photographing apparatus according to an embodiment of the present invention.
- FIG. 2 is an exploded perspective view showing a configuration of an image sensor driving apparatus according to an embodiment of the present invention.
- FIG. 3A is a diagram of the image sensor driving apparatus according to the embodiment of the present invention viewed from the lens unit side.
- FIG. 3B is a diagram of the image sensor driving apparatus according to the embodiment of the present invention viewed from the linear actuator side.
- FIG. 4A is a plan view for explaining the configuration of the drive unit of the image sensor drive device according to the embodiment of the present invention.
- FIG. 4B is a diagram showing a state of the drive unit when the pressing force of the linear actuator is increased in the image sensor driving apparatus according to the embodiment of the present invention.
- FIG. 5A is a side view showing an example of the operation of the image sensor driving apparatus in the embodiment of the present invention.
- FIG. 5B is a side view showing an example when the position of the image sensor of the image sensor driving apparatus in the embodiment of the present invention is changed.
- FIG. 6 is a diagram showing an example of linearity characteristics between the image sensor driving device and the comparative example in the embodiment of the present invention.
- FIG. 7 is a perspective view showing a configuration of another image sensor driving device in the embodiment of the present invention.
- FIG. 8 is a diagram for explaining a configuration of an image sensor driving device using the planar first support portion in the embodiment of the present invention.
- FIG. 9A is a diagram for explaining a configuration of an imaging element driving device using the planar first support portion in the embodiment of the present invention.
- FIG. 9B is a diagram for explaining the configuration of the imaging element driving device using the planar first support portion in the embodiment of the present invention.
- FIG. 10A is a diagram for explaining a configuration of an image sensor driving device using the planar first support portion in the embodiment of the present invention.
- FIG. 10B is a diagram for explaining the configuration of the image sensor driving device using the planar first support portion in the embodiment of the present invention.
- FIG. 11 is a diagram showing a configuration of another example of the imaging element driving device according to the embodiment of the present invention.
- FIG. 12A is a diagram showing still another example of the imaging element driving device according to the embodiment of the present invention.
- FIG. 12B is a diagram showing still another example of the imaging element driving device according to the embodiment of the present invention.
- FIG. 13A is a diagram showing still another example of the imaging element driving device according to the embodiment of the present invention.
- FIG. 13B is a diagram showing still another example of the imaging element driving device according to the embodiment of the present invention.
- FIG. 1 is a diagram showing a configuration of a photographing apparatus 1 according to an embodiment of the present invention.
- FIG. 2 is an exploded perspective view showing a configuration of the image sensor driving device 70 in the embodiment of the present invention.
- the X-axis direction is the optical axis direction of the lens unit, and the Y-axis direction and the Z-axis direction are directions perpendicular to the optical axis direction, respectively.
- the imaging apparatus 1 includes a lens unit 101.
- a filter drive that can be moved in the Y-axis direction by driving the DC motor unit 4 that is attached to the DC motor unit 4 and DC motor unit 4 that moves the filter unit 5 (described later) in a direction perpendicular to the optical axis (Y-axis direction).
- Filter unit 5 having an infrared light cut filter 51 attached to shaft 52 and filter drive shaft 52 and movable in the Y-axis direction together with filter drive shaft 52, base unit Position detection for detecting the position of the image sensor holding unit 11 attached to the base unit 6 and the base unit 6 fixed to the lens unit 101, to which the mounting unit 3 and a U-shaped member 80 described later are attached.
- the movable part 7 is attached to the upper surface of the part 61 and the base part 6 (hereinafter referred to as the base surface 62) by the first support part 8 and the second support part 9, and is arranged to face the base face 62.
- the reinforcing plate 27 that reinforces the strength of the movable part 7 and the first support
- the fixed leaf spring part 10 and the first support part 8 are attached by screws 24 to increase the mechanical strength of the first support part 8.
- the first reinforcing plate 16 to be reinforced and the second supporting portion 9 are attached by screws 26, and the second reinforcing plate 17 to reinforce the mechanical strength of the second supporting portion 9 and the movable portion 7 are reinforced.
- the image sensor (known imaging device such as a CCD or CMOS sensor) 15 and the image sensor holder 11 attached to the image sensor circuit section 12 via the insulating sheet 13 and the image sensor holding section 11 are described in the optical axis direction (X-axis direction) as described later.
- the linear actuator 20 is driven by the shaft, the bearing 18 attached to the base surface 62, and the linear actuator 20 is pressed by the linear actuator 20 and rotates with the bearing 18 as the center of rotation.
- Driving direction to change the direction of pressing force of eta 20 The conversion unit 22, the pin 29 provided on the surface facing the base surface 62 of the image sensor holding unit 11, the drive direction conversion unit 22, and the pin 29 is sandwiched between the drive direction conversion unit 22 and the pin 29
- a leaf spring 19 that slidably holds the pin 29, a coil spring 21 that is a biasing portion that holds the drive direction converting portion 22 in a biased state in one direction, a spring stopper 30 that fixes the coil spring 21,
- a circuit unit 23 including a video signal processing unit that performs video signal processing on the electrical signal output from the image sensor 15, a control unit that performs switching control processing of the filter unit 5, and a correction unit that performs correction processing described later. .
- the imaging device 1 in the embodiment of the present invention is a surveillance camera device, and performs imaging by switching the filter unit 5 in accordance with the brightness of the surroundings in order to perform imaging regardless of day or night. Specifically, when the surroundings are bright, an infrared light cut filter 51 is placed on the optical axis to make visible light region. When the surroundings are dark, the infrared cut filter 51 placed on the optical axis is removed, and black and white images are captured with light rays of wavelengths including those in the infrared region. Do.
- the brightness of the surroundings in the photographing apparatus 1 can be detected by comparing the illuminance value detected by the illuminance change detection unit (not shown) mounted in the circuit unit 23 with a predetermined threshold.
- the unit 23 switches the filter unit 5 assuming that the time zone between daytime and nighttime is switched. Further, the switching of the filter part 5 can be performed by the DC motor part 4 attached to the base part attaching part 3.
- the filter unit 5 when the illuminance changes, the filter unit 5 is switched, and at that time, an infrared light cut filter 51 is disposed on the optical axis. Since the optical path length is changed due to being retracted (hereinafter, this operation is referred to as attachment / detachment), the surface on which the photoelectric conversion element in the image sensor 15 is arranged from the lens unit 101 (hereinafter, this surface is referred to as the imaging surface 83). The optimal in-focus position will change.
- the imaging device 1 controls the imaging element 15 and the imaging surface 83 with respect to the optical axis direction of the lens unit 101 under the control of the control unit.
- an image sensor driving device 70 is mounted that moves in the optical axis direction (X-axis direction) while maintaining the vertical state (that is, in a state parallel to the YZ plane in FIG. 1).
- the leaf spring portion 10 between the force base portion 6 and the first support portion 8 is provided in each of the leaf spring portions 10, respectively.
- the leaf spring portion 10 between the base portion 6 and the second support portion 9 is used as the second bearing portion 42 as the plate between the movable portion 7 and the first support portion 8.
- the spring part 10 functions as the third bearing part 43
- the leaf spring part 10 between the movable part 7 and the second support part 9 functions as the fourth bearing part 44, respectively.
- FIG. 3A and 3B are perspective views of the image sensor driving device 70 according to the embodiment of the present invention
- FIG. 3A is a diagram of the image sensor driving device 70 viewed from the lens unit 101 side
- FIG. 3B is an image sensor driving device. It is the figure which also looked at the linear actuator 20 side force of the apparatus 70.
- FIG. In FIG. 2, FIG. 3A and FIG. The structure is shown in a more simplified form than that shown in FIG.
- the image sensor driving device 70 in the embodiment of the present invention is attached to the lens mount unit 2 that is fixed in position relative to the lens unit 101.
- the base part 6 attached to the base mounting part 3 with screws 72, and the base surface 62 of the base part 6 with the same height in the Y-axis direction.
- the first support portion 8 and the second support portion 9 that are powerfully parallel to each other, and the first support portion 8 and the second support portion 9 are attached so as to be parallel to the base surface 62 while being parallel to each other.
- leaf spring part 10 provided between base part 6 and second support part 9 and movable part 7 are attached to the upper surface with screws 28, respectively.
- the first reinforcing plate 16 attached to the first supporting portion 8 with screws 24 and the second supporting portion 9 are mechanically reinforced to reinforce the mechanical rigidity of the first reinforcing portion 27 and the first supporting portion 8.
- the second reinforcing plate 17 attached to the second support 9 with screws 26 and the reinforcing plate 27 of the movable portion 7 on the side (front side) opposite to the side (front side) provided (rear side) 28, and an image sensor holding unit 11 to which an image sensor circuit unit 12 having an image sensor 15 is attached by screws 25, a pin 29 provided on the lower surface of the image sensor holding unit 11 facing the base surface 62, a base Y-axis in the drawing by an actuator holding portion 81 provided on the surface 62, a linear actuator 20 held by the actuator holding portion 81, and a bearing portion 18 (not shown) provided on the base surface 62 Change of driving direction pivotally supported with the direction as the rotation axis
- the plate spring 19 is provided in the drive unit 22 and the drive direction conversion unit 22 and is slid by sandwiching the pin 29 between the drive direction conversion unit 22 and the drive direction conversion unit 22 is provided from the linear actuator 20.
- the movable portion 7, the first support portion 8, the second support portion 9 and The leaf spring portion 10 is formed by an integral U-shaped member 80 bent into a U-shape.
- a member having relatively low rigidity for example, a SUS material having a thickness of 0.12 mm can be used.
- the base mounting portion 3, the base portion 6, and the image sensor holding portion 11 can each be formed by a die casting method using aluminum.
- a relatively rigid member that can reinforce the mechanical strength of the U-shaped member 80 for example, A SUS material with a thickness of 0.5 mm can be used.
- the first support portion 8, the second support portion 9, the movable portion 7, and the leaf spring portion 10 are an integral U-shaped member 80.
- the first reinforcing plate 16 and the second reinforcing plate 17 are attached to the first support portion 8 and the second support portion 9 respectively, and the bent portion 74 is formed on the side surface.
- the rigidity of the first support portion 8 and the second support portion 9 can be made higher than that of the leaf spring portion 10.
- the bent portion 76 is provided also in the movable portion 7 of the U-shaped member 80, and the rigidity of the movable portion 7 is compared with that of the leaf spring portion 10 by attaching the reinforcing plate 27. Can be raised.
- bent portions 75 are provided at the end portions of the mounting surfaces 82 and 85 to be attached to the base surface 62 of the U-shaped member 80, and the rigidity in this portion can be increased. ing.
- the portion between the movable portion 7 of the U-shaped member 80 and the first support portion 8 and the second support portion 9 is not subjected to reinforcement such as a bending process, and the force is not reduced. Since the width is formed narrower than the portions, these portions function as the leaf spring portion 10.
- the portion between the mounting surfaces 82, 85 of the U-shaped member 80 and the first support portion 8 and the second support portion 9 is not reinforced, such as bending, and the force is Since the width is narrower than the portions, these portions also function as the leaf spring portion 10.
- the mounting surface 82 where the first support portion 8 and the base surface 62 are in contact, and the second support portion 9 and the base surface 62, are attached to the base surface 62 with screws 71 so as to be parallel to each other in the Z-axis direction in the drawing perpendicular to the optical axis direction (X-axis direction).
- FIGS. 4A to 4B are plan views for explaining the configuration of the drive unit 100 of the image sensor drive device 70 in the embodiment of the present invention.
- FIG. 4A is a plan view showing the configuration of the drive unit 100 of the image sensor drive device 70 in the embodiment of the present invention.
- linear actuator 20 has its axis movable in the vertical direction (Z-axis direction) in the drawing. 98, the drive direction conversion unit 22 is pressed downward in the drawing (one Z-axis direction).
- the drive direction conversion section 22 is provided with a coil spring 21 that applies an urging force in the opposite direction to the urging force of the linear actuator 20, and the coil spring 21 is a spring stopper 30. One end is fixed by. In the state shown in FIG. 4A, the urging force by the linear actuator 20 and the urging force by the coil spring 21 are balanced, and the drive direction converting portion 22 is in a stopped state.
- a leaf spring 19 is attached to the drive direction conversion unit 22 with screws 99 so as to sandwich the pin 29 of the image sensor holding unit 11, and the pin 29 changes the drive direction by changing the pressing force of the linear actuator 20. Slide between the conversion part 22 and the leaf spring 19.
- FIG. 4B is a diagram showing a state of the drive unit 100 when the pressing force of the linear actuator 20 is increased in the image sensor driving apparatus 70 according to the embodiment of the present invention.
- the drive unit 100 includes the drive direction conversion unit 22 that converts the output direction of the linear actuator 20.
- the linear actuator 20 can be arranged in a direction (Z-axis direction) perpendicular to the optical axis direction, which is not required to be arranged in the optical axis direction (X-axis direction), and the entire apparatus can be reduced in size. . If it is not necessary to reduce the size, the linear actuator 20 does not use the drive direction converter 22 but directly presses and moves the pin 29. It is pretty cute.
- FIG. 5A shows the operation of the image sensor driving apparatus 70 according to the embodiment of the present invention.
- FIG. 5A is a side view showing an example of the operation of the image sensor driving device 70 in the embodiment of the present invention
- FIG. 5B is a side view showing an example when the position of the image sensor 15 is changed. It is.
- FIG. 5A shows a state in which the first support portion 8 and the second support portion 9 are perpendicular to the base surface 62 in the image sensor driving device 70.
- the distance A on the base surface 62 between the first support portion 8 and the second support portion 9 is the optical axis direction between the first support portion 8 and the second support portion 9 at the connection portion with the movable portion 7. To be equal to the distance A in the (X-axis direction)
- the movable part 7 is
- the movable unit 7 is also held in a state parallel to the optical axis direction of the lens unit 101! RU
- the image sensor holding unit 11 including the image sensor circuit unit 12 having the image sensor 15 is disposed on the lower surface of the movable unit 7.
- the image pickup surface 83 of the image pickup device 15 is attached to the image pickup device holding portion 11 so that the image pickup surface 83 of the image pickup device 15 is perpendicular to the surface of the movable portion 7 of the image pickup device holding portion 11. It is held in a state perpendicular to the optical axis direction.
- the imaging element As shown in FIG. 5B, the child holding unit 11 moves in the left direction (the ⁇ X axis direction). Further, when the image sensor holding unit 11 moves leftward in the drawing, the movable unit 7 and the first support unit 8, the movable unit 7 and the second support unit 9, the base surface 62 and the first support unit 8 and The leaf spring portions 10 respectively provided between the base surface 62 and the second support portion 9 are elastically deformed. Therefore, in the image sensor driving device 70 according to the embodiment of the present invention, the first support portion 8 and the second support portion 9 each have the leaf spring portion 10 as a rotation center, that is, in the optical axis direction. Rotate with respect to the base portion 6 and the movable portion 7, respectively, with the directions perpendicular to each other and parallel to each other (the Z-axis direction in FIG. 5B) as the directions of the rotation center axes.
- the movable part 7, the first support part 8, the second support part 9, and the base surface 62 are deformed in a state where a substantially parallelogram is formed. Therefore, in the image sensor driving device 70 according to the embodiment of the present invention, it is possible to move the position of the image sensor 15 in the optical axis direction while the movable portion 7 is kept parallel to the base surface 62. It becomes. At this time, the image pickup surface 83 of the image pickup element 15 provided perpendicular to the movable portion 7 moves in a state of being kept perpendicular to the optical axis direction.
- the rotation center axes of the first rotation part 41, the second rotation part 42, the third rotation part 43, and the fourth rotation part 44 each have a vertex of a substantially parallelogram.
- the movable part 7 moves with respect to the base part 6, and the image sensor 15 can be moved in the optical axis direction while maintaining the surface direction of the image pickup surface 83.
- the pressing force of the linear actuator 20 is increased.
- the urging force against the drive direction conversion unit 22 is increased.
- the biasing force that the linear actuator 20 biases the drive direction converting portion 22 is greater than the biasing force that the coil spring 21 biases the driving direction converting portion 22.
- the driving direction converting portion 22 rotates about the bearing portion 18 in the opposite direction (clockwise), and the pin 29 provided at the tip also moves to the right in FIG. 5A. Move this pin 29 As a result, the image sensor holding unit 11 moves in the right direction (X-axis direction) of the drawing.
- the heights from the base surface 62 are equal to each other and are parallel to each other and rotated in the direction along the optical axis direction. Since the movable portion 7 is supported by the movable first support portion 8 and the second support portion 9, the movable portion 7 is always in the optical axis direction while maintaining a state parallel to the base surface 62. It can move in the direction along.
- the imaging element holding unit 11 is attached to the movable part 7 so that the imaging surface 83 of the imaging element 15 is arranged in a vertical direction. Therefore, the imaging element 15 has an imaging axis 83 on the optical axis.
- the image sensor 15 can be moved with high accuracy by moving in the optical axis direction while maintaining a state perpendicular to the direction.
- the first support portion 8 is held between the base portion 6 by a pair of first rotating portions 41 (also referred to as a first plurality of points 111), and is movable.
- the space between the parts 7 is held by a pair of third rotating parts 43 (also referred to as second plural points 112).
- the first rotating portion 41 rotatably connects the base portion 6 and the first support portion 8 at the first plurality of points 111
- the third rotating portion 43 is At the second plurality of points 112
- the movable part 7 and the second support part 8 are rotatably connected.
- the first support unit 8 can hold the first plurality of points 111 and the second plurality of points 112 on a plane while the image sensor 15 is moving.
- the image sensor driving device 70 it is possible to prevent three-dimensional torsion when the position of the image sensor 15 in the optical axis direction is changed, and the tilt error ( ) Can be prevented.
- the first support from the mechanism for moving the image sensor 15 in the optical axis direction that is, the mounting surface 82 in contact with the base surface 62.
- the mechanism up to the part 8, the movable part 7, the second support part 9, the mounting surface 85 and the leaf spring part 10 can all be created by punching, molding, etc., for example, an integral plate material. .
- the occurrence of friction and rattling is extremely small, and therefore it is possible to drive with high accuracy even when a minute driving is performed.
- FIG. 10 is a diagram showing an example of linearity characteristics between the image sensor driving device 70 and the comparative example in the embodiment of the present invention.
- the horizontal axis represents the number of drive steps of the linear actuator 20, and the vertical axis represents the output value when the position of the image sensor 15 at that time is measured by the position detector 61 described above. Is shown. In such a relationship, when the output value of the position detector 61 changes smoothly with respect to the number of drive steps of the linear actuator 20, it can be evaluated that the linearity characteristic is good.
- the image sensor driving device 70 according to the embodiment of the present invention, the image sensor 15 moves in the optical axis direction by about 5 ⁇ m every time the linear actuator 20 is driven by one step. It shall be configured.
- the linearity characteristic of the imaging element driving device 70 in the embodiment of the present invention is compared with the linearity characteristic of the imaging element driving device of the comparative example. It can be seen that it has improved dramatically. As described above, this is considered to be due to the fact that there are few members that cause friction and rattling such as lead screws in the configuration.
- FIG. 6 is a result of plotting the relationship between the output value of the position detector 61 provided in the image sensor driving device 70 and the number of drive steps of the linear actuator 20. Therefore, FIG. 6 shows the reality characteristic near the approximate center (origin) position of the movable range of the image sensor 15 in the optical axis direction (X-axis direction). Further, although not shown, in the imaging element driving apparatus 70 according to the embodiment of the present invention, the movable range of the imaging element 15 in the optical axis direction (X-axis direction) (for example, the number of driving steps is about 650.
- the imaging element driving device 70 is between the base portion 6 and the movable portion 7, each having a columnar shape and a pair of the first support portion 8 and the second support portion 9.
- the mechanical strength of the first support portion 8 is reinforced by the first reinforcing plate 16, and the mechanical strength of the second support portion 9 is reinforced by the second reinforcing plate 17.
- FIG. 7 is a perspective view showing a configuration of another image sensor driving apparatus 170 in the embodiment of the present invention. As shown in FIG.
- the first support portion 108 is a planar member having a hole in a portion where light rays that are not columnar are transmitted, and the base portion 6
- the connecting portion is formed thinly to form the first plurality of points 111 (first rotating portion 41), and the connecting portion with the movable portion 7 is formed to be thinned to form the second plurality of points. 11 2 (third rotating portion 43) is configured.
- the first reinforcing plate 16 is not necessary.
- the first support portion 108 is formed with a bent portion 120 to reinforce its surface strength. Also with this configuration, it is possible to suppress the occurrence of surface blurring when the image sensor 15 is moved.
- the second support portion 9 side may be configured in a planar shape.
- FIG. 8 shows the configurations of the image sensor driving devices 270, 370, and 470 using the planar first support portion 108 in the embodiment of the present invention, respectively. It is a figure for demonstrating.
- the peripheral portion of the opening where the light beam should pass is bent. Therefore, by providing the bent portion 130, the rigidity of the first support portion 108 can be increased. As shown in FIG. 8, the bending direction of the bent portion 130 may be directed to the outside of the image sensor driving device 270, or may be directed to the inside. It is possible to increase the rigidity.
- FIG. 9B is a diagram showing a cross-sectional shape of the drawn portion 140 shown in FIG. 9A.
- the drawing unit 140 is drawn so that the cross section is a substantially circular curved surface.
- FIG. 10B is a diagram showing a cross-sectional shape of the drawn portion 150 shown in FIG. 10A.
- the drawing portion 140 is drawn so that the periphery of the opening protrudes.
- the protruding direction may also face the outside of the image sensor driving device 470, or may face the inside.
- the image sensor driving device of the present invention is limited to this configuration is not.
- FIG. 11 is a diagram showing a configuration of another example of the image sensor driving apparatus according to the embodiment of the present invention
- FIGS. 12A to 12B are diagrams showing still other examples.
- the image sensor driving device 90 shown in FIG. 11 includes a movable part 7 and a first support part 8, a movable part 7 and a second support part 9, a base surface 62 and a first support part 8 and A hinge portion 91 is formed at a portion between the base surface 62 and the second support portion 9.
- the first support portion 8 and the second support portion 9 are elastic to each other. It is desirable to provide an elastic part 96 such as a coil spring to be connected to the cable.
- the movable part 7 and the first support part 8, the movable part 7 and the second support part 9, the base surface 62 and the first support part 8, and the base surface 62 and the first support part 8 are used.
- 2 shows an example in which a hinge portion 91 is formed in each of the portions between the support portions 9. Is not limited to this example.
- some portions may have a leaf spring portion 10 and other portions may have a hinge portion 91.
- the image sensor driving devices 70 and 90 are configured to include the pair of first support portions 8 and the pair of second support portions 9.
- the imaging element driving device of the invention is not limited to this.
- the first support portion 8 has a pair configuration
- the second support portion 9 has one configuration.
- the second support portion 9 may have a pair configuration
- the first support portion 8 may be one. Even in such a configuration, since the first support portion 8 or the second support portion 9 has a paired configuration, the rigidity in the direction perpendicular to the optical axis direction can be increased.
- the base surface 62 and the movable part 7 are each parallel to the optical axis, and the first support part 8
- the force showing the example in which the heights of the second support portions 9 are the same and are parallel to each other is not limited to this configuration.
- FIGS. 13A to 13B show side views of still another example of the image sensor driving apparatus 70 in the embodiment of the present invention.
- the image sensor driving device 93 shown in Figs. 13A to 13B includes a base unit 6 fixed in position relative to a lens unit (not shown), a movable unit 7 provided at a position facing the base unit 6, and a base unit.
- First support portion 8 and second support portion 9 provided on base surface 62 of 6 and supporting movable portion 7, and a first rotation provided between base portion 6 and first support portion 8.
- the third rotating portion 75b provided between the moving portion 75a and the second supporting portion 9b of the base portion 6 and the second rotating portion 75b provided between the first supporting portion 8 and the movable portion 7.
- a moving part 75c, a fourth rotating part 75d provided between the second support part 9 and the movable part 7, and an imaging element holding part 11 having an imaging element 15 provided in the movable part 7. ing.
- the first rotating portion 75a, the second rotating portion 75b, the third rotating portion 75c, and the fourth rotating portion 75d each have a hinge function similar to that of the hinge portion 91 described above.
- the image sensor driving device 93 shown in FIGS. 13A to 13B is different from the image sensor driving device 70 shown in FIGS. 5A to 5B in that the movable portion 7 and the base portion 6 are optical axes of the lens portion.
- the first support portion 8 and the second support portion 9 that are not parallel to the direction are not linear.
- the rotation center axis of the first rotation unit 75a (hereinafter referred to as the first rotation center axis) 76a and the second rotation unit 75b are applied.
- the rotation center axes (hereinafter, referred to as fourth rotation center axes) 76d of the rotation unit 75d are arranged so as to be parallel to each other and to face in a direction perpendicular to the optical axis direction.
- the first rotation center axis 76a and the second rotation center axis 76b are positioned in a direction parallel to the optical axis direction.
- the third rotation center axis 76c and the fourth rotation center axis 76d are located in a direction parallel to the optical axis direction, and the first rotation center axis 76a The distance A from the second rotation center axis 76b
- each is located at a vertex of the parallelogram.
- the third rotation center shaft 76c and the fourth rotation center shaft 76d have a length of one side of the distance A.
- the image sensor 15 has a first rotation center axis 76a, a second rotation center axis 76b, a third rotation center axis 76c, and a fourth rotation center axis 76d. While remaining at the top of the parallelogram (the direction connecting the first rotation center axis 76a and the second rotation center axis 76b and the third rotation center axis 76c and the fourth rotation center It moves (with the direction connecting the axes 76d parallel to the optical axis direction). Accordingly, the movable portion 7 moves in the optical axis direction while maintaining the angle formed with the optical axis direction. Therefore, the imaging device 15 maintains the direction of the imaging surface 83 in the optical axis direction ( It is possible to move in the X axis direction.
- the center position of the image pickup surface 83 of the image pickup device 15 is changed by the force position detection unit 61 that changes with the movement with respect to the optical axis direction (X-axis direction) of the image pickup device 15.
- a displacement amount calculation unit that detects a position in the optical axis direction (X-axis direction) of the image sensor, calculates a displacement amount in a direction perpendicular to the optical axis direction of the image sensor 15 (Y-axis direction) from the position, and the amount Therefore, by mounting the correction unit, which is a circuit that corrects the signal readout area so as to shift and output the signal, in the circuit unit 23 (not shown), it is practically perpendicular to the optical axis direction of the image sensor 15. The effect of displacement in the direction (Y-axis direction) can be eliminated. If the amount of movement of the image sensor 15 in the optical axis direction (X-axis direction) is small, there is no practical problem even if the above correction processing is not performed.
- the image sensor holding unit 11 that holds the image sensor 15 is provided on the surface of the movable unit 7 that faces the base unit 6.
- the present invention is not limited to this configuration.
- the movable portion 7 is provided on the surface opposite to the surface facing the base portion 6 (for example, the upper surface of the movable portion 7 in FIG. 5A), as described above,
- the imaging element 15 can be moved in the optical axis direction while keeping the imaging surface 83 perpendicular to the optical axis direction.
- the image sensor driving device in the embodiment of the present invention has been described using an example mounted on a monitoring camera device, the use of the imaging device of the present invention is limited to the monitoring camera device. It is not a thing. For example, it can be installed in any known camera such as a video camera or a digital camera.
- the image pickup surface is made of the light of the lens unit with a simple configuration in which the image pickup element is attached to the movable unit movable in the optical axis direction of the lens unit with respect to the base surface.
- the image sensor can be moved in the direction of the optical axis of the lens while keeping the axis perpendicular to the axial direction, resulting in mechanical rattling like using a lead screw and nut. Even if you want to drive a small distance, you can reduce the possibility.
- the photographing device can be realized with high driving accuracy of the child, it has an excellent effect, and the photographing device such as a surveillance camera device or a video camera device, in particular, the image sensor in the optical axis direction of the lens unit. It is useful as an image sensor driving device for moving and an imaging device using the image sensor driving device.
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05806677A EP1814312B1 (en) | 2004-11-17 | 2005-11-16 | Image pickup element driving device, and image pickup device and monitoring camera device using such image pickup element driving device |
US10/579,944 US7607841B2 (en) | 2004-11-17 | 2005-11-16 | Pickup device driving apparatus, photographing device using the same, and monitoring camera apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004333015A JP3738777B1 (ja) | 2004-11-17 | 2004-11-17 | 撮像素子駆動装置およびそれを用いた撮影装置 |
JP2004-333015 | 2004-11-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006054570A1 true WO2006054570A1 (ja) | 2006-05-26 |
Family
ID=35798450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/020998 WO2006054570A1 (ja) | 2004-11-17 | 2005-11-16 | 撮像素子駆動装置ならびにそれを用いた撮影装置および監視カメラ装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7607841B2 (ja) |
EP (1) | EP1814312B1 (ja) |
JP (1) | JP3738777B1 (ja) |
KR (1) | KR100917538B1 (ja) |
CN (1) | CN1910905A (ja) |
RU (1) | RU2368092C2 (ja) |
WO (1) | WO2006054570A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2275600A2 (en) | 2006-05-19 | 2011-01-19 | Seed Co., Ltd. | Used paper recycling apparatus and its constituent devices |
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JP4508010B2 (ja) * | 2005-06-30 | 2010-07-21 | パナソニック株式会社 | 撮像素子駆動装置およびそれを用いた撮影装置 |
JP4231075B2 (ja) | 2006-10-30 | 2009-02-25 | パナソニック株式会社 | 監視カメラ装置 |
US7889627B2 (en) * | 2007-11-05 | 2011-02-15 | Seagate Technology Llc | Preload modulation to reduce head motion hysteresis |
CN102520565A (zh) | 2008-09-11 | 2012-06-27 | 松下电器产业株式会社 | 摄像装置 |
CN102170556A (zh) * | 2010-02-25 | 2011-08-31 | 远业科技股份有限公司 | 智能化功能的监控摄影系统及其监控摄影的方法 |
TW201210330A (en) * | 2010-08-19 | 2012-03-01 | Hon Hai Prec Ind Co Ltd | Power-source circuit for infrared-cut filter removable device |
JP2012088685A (ja) | 2010-09-22 | 2012-05-10 | Panasonic Corp | カメラ装置 |
JP2014032297A (ja) * | 2012-08-03 | 2014-02-20 | Casio Comput Co Ltd | 撮像装置 |
JP2014045304A (ja) | 2012-08-27 | 2014-03-13 | Sony Corp | カメラモジュールおよび電子機器 |
US10051211B2 (en) * | 2013-12-05 | 2018-08-14 | Omnivision Technologies, Inc. | Image sensors for capturing both visible light images and infrared light images, and associated systems and methods |
CN107333039B (zh) * | 2017-07-07 | 2019-02-12 | 杭州潇楠科技有限公司 | 一种方便移动的智能摄像装置 |
EP3570103B1 (en) | 2018-05-17 | 2020-07-01 | Axis AB | Camera arrangement and method for aligning a sensor board and an optics unit |
EP3627815B1 (en) | 2018-09-19 | 2021-10-06 | Canon Kabushiki Kaisha | Image pickup device |
JP2022117068A (ja) | 2021-01-29 | 2022-08-10 | i-PRO株式会社 | 撮像装置 |
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2005
- 2005-11-16 RU RU2006126096/09A patent/RU2368092C2/ru not_active IP Right Cessation
- 2005-11-16 KR KR1020067009929A patent/KR100917538B1/ko not_active IP Right Cessation
- 2005-11-16 CN CNA2005800026195A patent/CN1910905A/zh active Pending
- 2005-11-16 US US10/579,944 patent/US7607841B2/en active Active
- 2005-11-16 EP EP05806677A patent/EP1814312B1/en not_active Not-in-force
- 2005-11-16 WO PCT/JP2005/020998 patent/WO2006054570A1/ja active Application Filing
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Cited By (4)
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EP2275600A2 (en) | 2006-05-19 | 2011-01-19 | Seed Co., Ltd. | Used paper recycling apparatus and its constituent devices |
EP2281941A2 (en) | 2006-05-19 | 2011-02-09 | Seed Co., Ltd. | Used paper recycling apparatus and its constituent devices |
EP2290158A2 (en) | 2006-05-19 | 2011-03-02 | Seed Co., Ltd. | Used paper recycling apparatus and its constituent devices |
EP2290157A2 (en) | 2006-05-19 | 2011-03-02 | Seed Co., Ltd. | Used paper recycling apparatus and its constituent devices |
Also Published As
Publication number | Publication date |
---|---|
US20070147193A1 (en) | 2007-06-28 |
KR100917538B1 (ko) | 2009-09-16 |
EP1814312B1 (en) | 2011-08-17 |
EP1814312A1 (en) | 2007-08-01 |
CN1910905A (zh) | 2007-02-07 |
JP2006148299A (ja) | 2006-06-08 |
RU2006126096A (ru) | 2008-01-27 |
US7607841B2 (en) | 2009-10-27 |
EP1814312A4 (en) | 2010-04-28 |
JP3738777B1 (ja) | 2006-01-25 |
RU2368092C2 (ru) | 2009-09-20 |
KR20070085034A (ko) | 2007-08-27 |
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