Image-capturing apparatus and driving method of optical system
AssigneeSony Corporation
InventorHidenori Kushida
Life of this patent
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Abstract
An image-capturing apparatus for controlling a drive system for an optical system corresponding to the position of an operation unit includes a motor for driving a control target of the drive system, a driver for the motor, position detecting means for detecting the position of the operation unit, position generating means for generating the output corresponding to the position of the operating unit with a limited movable range by configuring an initialization value and maximum and minimum values of integrated displacement by the output of the position detecting means, and controlling means for controlling the motor via the driver so as to drive the control target corresponding to the position generating output of the operating unit.
Claims26
A camera comprising:
- a control target configured to move along a path, a moveable range of said control target being between a minimum position and a maximum position;
- a displacement detector configured to detect a displacement of an actuator, said control target being movable along said path to a target position by an amount of said displacement;
- a storage area configured to store a predetermined minimum value of said minimum position and a predetermined maximum value of said maximum position,
- wherein a value of said minimum position is decreased to a renewed minimum value when a value of said target position becomes smaller than said predetermined minimum value,
- wherein a value of said maximum position is increased to a renewed maximum value when said value of said target position becomes larger than said predetermined maximum value.
A driving method for driving an optical system in a camera, the method comprising the steps of:
- initializing a value of a minimum position to a predetermined minimum value;
- initializing a value of a maximum position to a predetermined maximum value;
- initializing a target position to a predetermined target value, said target position representing a location along said path of a control target;
- detecting a displacement of an actuator;
- moving said control target along said path, said target position being varied by an amount of said displacement;
- decreasing said value of said minimum position to a renewed minimum value when a value of said target position becomes smaller than said predetermined minimum value;
- increasing said value of said maximum position to a renewed maximum value when a value of said target position becomes larger than said predetermined maximum value.
Dependencies are inferred from the claim text.