Stage apparatus and camera shake correction apparatus

Patent metadata

Field	Value
Publication number	US-9288394-B2
Application number	US-201313744873-A
Country	US
Kind code	B2
Filing date	Jan 18, 2013
Priority date	Feb 1, 2012
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

A stage apparatus includes a stationary support plate, magnetic force generators immovable relative to the stationary support plate, a stage member, an image sensor fixed to the stage member, a control circuit board connected to a side of the stage member, and coils which produce a driving force upon a supply of electric current thereto, the coils being fixed to the stage member at an opposite side of the center of the stage member with respect to the control circuit board, and a FPC board between the stationary support plate and the stage member. The stationary support plate is recessed, from a lateral edge of the stationary support plate at which the control circuit board is provided, in a direction toward the coils and includes an FPC board escape recess, in which said FPC board is partially positioned.

First claim

What is claimed is:

1. A stage apparatus comprising:
a stationary support plate;
a magnetic force generator which is immovable relative to said stationary support plate; a stage member that is superimposed on said stationary support plate in a thickness direction of said stationary support plate, wherein said stage member is slidably movable relative to said stationary support plate in a plane;
an image sensor fixed to said stage member;
a control circuit board which is immovably provided at a lateral side of said stage member; and
a coil, which produces a driving force upon a supply of electric current thereto, positioned within a magnetic field produced by said magnetic force generator, said coil being fixed to said stage member at a position on an opposite side of the center of said stage member with respect to said control circuit board; and
at least one FPC board provided between said stationary support plate and said stage member, said FPC board electrically connecting said image sensor and said control circuit board, and transmitting an electric signal between said image sensor and said control circuit board,
wherein said stationary support plate includes an aperture and an FPC board escape recess that opens, from a minor side of said stationary support plate at which said control circuit board is provided, in a direction toward said coil, said FPC board escape recess extending from said aperture to an exterior of said stationary support plate, said FPC board escape recess being configured to receive therein at least a part of said FPC board.

2. A camera shake correction apparatus provided in a camera, said camera shake correction apparatus using the stage apparatus according to claim 1 , wherein said stage apparatus is incorporated in said camera,
wherein said camera shake correction apparatus is further provided with a gyro sensor for detecting image shake of said camera, and
wherein said control circuit board passes electric current through said coils based on angular velocity information detected by said gyro sensor to compensate image shake of an object image captured by said image sensor.

3. The stage apparatus according to claim 1 , wherein the FPC board escape recess extends through a body of the stationary support plate.

4. A stage apparatus comprising:
a stationary support plate;
a magnetic force generator which is immovable relative to said stationary support plate;
a stage member that is superimposed on said stationary support plate in a thickness direction of said stationary support plate, wherein said stage member is slidably movable relative to said stationary support plate in a plane;
a control circuit board which is immovably provided at a lateral side of said stage member;
an image sensor fixed to said stage member; and
a first FPC board provided between said stationary support plate and said stage member, said first FPC board electrically connecting said image sensor and said control circuit board,
wherein said stage member is provided with a cover member fixed thereto, for protecting at least a part of said first FPC board, the cover member including a first cover portion fixed to the stage member and extending in a plane of the stage member, a second cover portion comprising a front surface protective portion that extends in a plane transverse to the first cover portion and a third cover portion comprising an edge protective portion that extends in a plane transverse to the plane of the second cover portion.

5. The stage apparatus according to claim 4 , further comprising:
a coil, which produces a driving force upon a supply of electric current thereto, positioned within a magnetic field produced by said magnetic force generator, said coil being fixed to said stage member at a position on an opposite side of the center of said stage member with respect to said control circuit board; and
a second FPC board provided between said stationary support plate and said stage member, said second FPC board electrically connecting said coil and said control circuit board, and supplying electric current from said control circuit board to said coil.

6. The stage apparatus according to claim 5 , wherein at least one of said first FPC board and said second FPC board comprises at least one deformed portion having a flexibly changeable shape, provided in a part facing, in said thickness direction, a clearance between said stage member and said control circuit board, and projects in a direction opposite to said stationary support plate,
wherein said cover member faces said deformed portion from a side opposite to said stationary support plate.

7. The stage apparatus according to claim 2 , the third cover portion being positioned to cover at least a part of the first FPC board.

8. The stage apparatus according to claim 2 , the stationary support plate and the stage member being received within a housing.

9. A stage apparatus configured to be included in a camera having an image sensor, the stage apparatus comprising:
an integrated movable body which is slidably movable;
a pair of coils, both of which apply a linear driving force in one driving direction to said integrated movable body upon an electric current being passed through said pair of coils, said pair of coils being positioned in a magnetic field; and
a single driver for carrying out an electric current control on said pair of coils, wherein a distance, in a direction orthogonal to said one driving direction, from a center of gravity of an said integrated movable body to the center of driving force of one of said pair of coils is longer than a distance, in the direction orthogonal to said one driving direction, from the center of gravity to the center of driving force of the other of said pair of coils, and
wherein said stage apparatus is further provided with a driving force reducer comprising an electric resistor for reducing said driving force in an electric circuit electrically connected to said one of said pair of coils that is located at a longer distance, in the direction orthogonal to said one driving direction from the center of gravity to the center of driving force of said one of said pair of coils.

10. A camera shake correction apparatus, comprising said stage apparatus according to claim 9 ,
wherein said stage apparatus is further provided with one of an image shake correction lens and an image sensor fixed thereto,
wherein said camera shake correction apparatus is further provided with a gyro sensor for detecting image shake of said camera, and
wherein said electric power supply passes electric current through said pair of coils based on angular velocity information detected by said gyro sensor to compensate image shake of an object image formed through said image shake correction lens or formed on said image sensor.

11. The camera shake correction apparatus according to claim 10 , further comprising:
at least one FPC board,
wherein one end of said at least one FPC board is electrically connected to said pair of coils, and/or said image sensor, for supplying electric current to said coils, and
wherein a control circuit board serving as said electric power supply is provided at a lateral side of said stationary support plate and at an opposite side of said image shake correction lens or image sensor with respect to said pair of coils, and wherein the other end of said FPC board is electrically connected to said control circuit board.

12. The stage apparatus according to claim 9 , said pair of coils being provided to apply a linear driving force in said one driving direction and a further pair of coils being provided to apply a linear driving force in a direction orth

Assignees

• Pentax Ricoh Imaging Co Ltd
• Ricoh Imaging Co Ltd

Inventors

• Yazawa Kazuki

Classifications

• H04N23/685

  performed by mechanical compensation · CPC title

• H04N23/6812 Primary

  based on additional sensors, e.g. acceleration sensors · CPC title

• H04N23/682 Primary

  Vibration or motion blur correction · CPC title

• H04N5/23264 Primary

  Electricity · mapped topic

• H04N5/2328

  Electricity · mapped topic