Anti-shake apparatus

• US 20050190268A1
• Filed: 02/25/2005
• Published: 09/01/2005
• Est. Priority Date: 02/27/2004
• Status: Active Grant

• Current Assignee: PENTAX RICOH IMAGING COMPANY, LTD.
• Original Assignee: Pentax Corporation (Hoya Corporation)
• Inventors: Uenaka, Yukio
• Granted Patent: US 7,564,483 B2
• Time in Patent Office: Days
• US Class Current: 348/208.99
• CPC Class Codes: H04N 23/68 for stable pick-up of the scene, e.g. compensating for camera body vibrations
• CPC Class Codes: H04N 23/687 by shifting the lens or sensor position

Abstract

An anti-shake apparatus of a photographing-apparatus, comprises a movable unit, a fixed unit, an indicating unit, and a control apparatus. The movable unit has an imaging device and can be moved in first- and second-directions. The first-direction is perpendicular to an optical axis of a photographing lens of the photographing-apparatus. The second-direction is perpendicular to the optical axis and the first-direction. The fixed unit slidably supports the movable unit in both the first and second-directions. The indicating unit indicates an image imaged by the imaging device. The control apparatus controls moving the movable unit and detecting a position of the movable unit. The control apparatus prohibits indicating the image on the indicating unit, from when the photographing-apparatus is set to the on state, until the movable unit has reached a specified point of a movement range of the movable unit.

Claims

1. An anti-shake apparatus of a photographing apparatus, comprising:

a movable unit that has one of an imaging device and a hand-shake correcting lens, and that can be moved in first and second directions, said first direction being perpendicular to an optical axis of a photographing lens of said photographing apparatus, and said second direction being perpendicular to said optical axis and said first direction;

a fixed unit that slidably supports said movable unit in both said first and second directions;

an indicating unit that indicates an image imaged by said imaging device; and

a control apparatus that controls moving said movable unit and detecting a position of said movable unit;

said control apparatus prohibiting indicating said image on said indicating unit, from when said photographing apparatus is set to the on state, until said movable unit has reached a specified point of a movement range of said movable unit.

2. The anti-shake apparatus according to claim 1, wherein said specified point is the center of said movement range;

and

said movable unit is located at said specified point, when a center area of said imaging device or said hand-shake correcting lens which is included in said movable unit, is located on said optical axis.

3. The anti-shake apparatus according to claim 1, wherein said control apparatus cancels the prohibition condition of said control apparatus and indicates said image on said indicating unit, even if said movable unit has not reached said specified point, when a release switch which is included in said photographing apparatus and is connected with said control apparatus, is set to the on state by the operator.

4. The anti-shake apparatus according to claim 1, wherein one of said movable unit and said fixed unit has a magnetic-field change-detecting unit, said magnetic-field change-detecting unit having a horizontal magnetic-field change-detecting element which is used for detecting said position of said movable unit in said first direction as a first location, and a vertical magnetic-field change-detecting element which is used for detecting said position of said movable unit in said second direction as a second location;

and

another of said movable unit and said fixed unit has a position-detecting magnet unit which is used for detecting said first and second locations, said position-detecting magnet unit having a first position-detecting magnet which is used for detecting said first location and which faces said horizontal magnetic-field change-detecting element, and having a second position-detecting magnet which is used for detecting said second location and which faces said vertical magnetic-field change-detecting element.

5. The anti-shake apparatus according to claim 4, wherein said movable unit has said magnetic-field change-detecting unit and a first driving coil which is used for moving said movable unit in said first direction and a second driving coil which is used for moving said movable unit in said second direction;

and

said fixed unit has said first position-detecting magnet which is used for moving said movable unit in said first direction, and has said second position-detecting magnet which is used for moving said movable unit in said second direction.

6. The anti-shake apparatus according to claim 4, wherein said magnetic-field change-detecting unit is a one-axis hall element;

and

said horizontal magnetic-field change-detecting element and said vertical magnetic-field change-detecting element are hall elements.