Patent Number: 6,512,321

Title: Driving apparatus and method of using same

Abstract: A driving apparatus includes an electromechanical conversion element that expands and contracts through the application of a drive voltage, the electromechanical conversion element includes a first end and a second end. The apparatus further includes a support member that is fixed to the first end of the electromechanical conversion element in a direction of expansion or contraction of the electromechanical conversion element; a drive member that is fixed to the second end of the electromechanical conversion element in the direction of expansion or contraction; an engaging member that engages with the drive member with a friction force; and a drive circuit that drives the electromechanical conversion element. The drive circuit generates a rectangular waveform drive voltage and applies the rectangular waveform drive voltage to the electromechanical conversion element to cause the electromechanical conversion element to expand and contract at different speeds to thereby move the support member and the engaging member relative to each other.

Inventors: Yoshida; Ryuichi (Sakai, JP), Okamoto; Yasuhiro (Tondabayashi, JP), Okada; Hiroyuki (Izumi, JP)

Assignee: Minolta Co., Ltd.

International Classification: H01L 41/09 (20060101); H01L 041/08 ()

Expiration Date: 01/28/2020