Image-shake compensation apparatus
AssigneeCanon Kabushiki Kaisha
InventorKoichi Washisu
Life of this patent
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Abstract
In an image-shake compensation apparatus, a movable unit is driven by a driving unit to provide image shake-compensation and a determination unit determines whether the driving unit is in condition to drive the movable unit. The determination unit inputs a predetermined driving signal to the driving unit for operating the driving unit. Concurrently, the determining unit detects a prescribed electromotive force induced in an electrical conductive section disposed in a magnetic flux which generates a displacement relative to the magnetic flux in response to the movement of the movable unit to perform the determination.
Claims27
An image-shake compensation apparatus comprising:
- movable means for moving for image-shake compensation;
- driving means for driving said movable means;
- and
- determination means for determining whether said driving means is in condition to drive said movable means,
- wherein said determination means inputs a predetermined driving signal for operating said driving means to said driving means, and concurrently, detects a prescribed electromotive force induced on an electrically conductive section which is disposed in a magnetic flux and which generates a displacement relative to the magnetic flux due to the movement of said movable means to perform the determination.
An image-shake compensation method comprising the steps of:
- moving a movable unit for image shake-compensation;
- driving the movable unit by a driving unit;
- and
- determining whether the driving unit is in condition to drive said movable means,
- wherein the determining step includes inputting a predetermined driving signal to the driving unit for operating the driving unit, and concurrently, detecting a prescribed electromotive force induced on an electrically conductive section which is disposed in a magnetic flux and which generates a displacement relative to the magnetic flux due to movement of the movable unit to perform the determination.
An image-shake compensation apparatus comprising:
- an optical unit for image-shake compensation;
- driving means for driving said optical unit in accordance with a driving signal;
- an electrically-conductive member disposed in a magnetic flux, wherein said electrically-conductive member induces an electromotive power when said optical unit is driven by said driving means;
- and
- judgement means for judging whether or not said optical unit is driven by detecting the electromotive power.
Dependencies are inferred from the claim text.