Patent Number: 7,085,484

Title: Driving device, position controller provided with driving device, and camera provided with position controller

Abstract: A driving device for an ultrasonic actuator for driving a movable member is provided with a member sensor for detecting a present position of the movable member, a calculator for calculating a control target position of the movable member, a driving circuit for generating such a drive voltage as to drive the ultrasonic actuator in a specified resonant state, and a control circuit for controlling an operative state of the movable member by adjusting at least one of physical quantities specifying the drive voltage as a maneuverable physical quantity in accordance with a difference between the present position and the control target position so that the movable member pursues the control target position. There can be provided a driving device capable of executing a position servo control while being driven in a specified resonant state, and a position controller and a camera provided with such a driving device.

Inventors: Hara; Yoshihiro (Kishiwada, JP)

Assignee: Minolta Co., Ltd.

International Classification: G03B 17/00 (20060101); H01L 41/04 (20060101)

Expiration Date: 8/01/02018