Patent Number: 8,576,291

Title: Drive unit, movable module, and autofocus control method

Abstract: To provide a drive unit and a drive module which include a shape memory alloy as a drive source to move a driven member and are capable of the high-precision movement of the driven member to a reference position. A drive unit and a drive module can be provided by controlling, in the drive unit and the drive module which include the shape memory alloy as the drive source to move the driven member, the shape memory alloy so that the resistance of the shape memory alloy is equal to the resistance when the driven member is located at the reference position.

Inventors: Tanimura; Yasutaka (Nara, JP), Aoi; Takeshi (Nishinomiya, JP), Hara; Yoshihiro (Takatsuki, JP), Shiota; Natsuko (Ibaraki, JP)

Assignee: Konica Minolta Opto, Inc.

International Classification: H04N 5/228 (20060101); H04N 5/232 (20060101)

Expiration Date: 1/05/12017