Patent ID: 6477328
Filing Date: 2002-11-05
Classification: G03B

Abstract:
A shutter for a camera comprising:sectors for opening and closing a shutter opening by reciprocal pivotal movement; a motor for reciprocally and pivotally moving the sectors by forwardly and reversely rotating a rotor of the motor by forward and reverse electricity conduction to a coil of the motor; a memory circuit having stored therein electricity conduction data of the coil corresponding to operational characteristics of the motor and the sectors, the electricity conduction data including pulses for rotating the rotor in a direction of opening of the sectors during opening movement thereof, and pulses for rotating the rotor in a direction reverse to the direction of opening of the sectors for reducing acceleration of the sectors while continuing the opening movement during the opening movement of the sectors; and a control circuit for controlling electricity conduction to the coil in accordance with a brightness of an object to be photographed and executing exposure control in accordance with the brightness of the object.