Konica Minolta Opto, Inc.

Shinichi Yamamoto

Ryuichi Yoshida

Satoshi Shinke

Hirohisa Sueyoshi

In order to provide a driving device that is capable of eliminating sticking of a movable member due to nonuse, the driving device includes a drive shaft that reciprocates in axial directions with expansion and contraction of an electromechanical transducer element, a movable member that frictionally engages with the drive shaft, and a drive circuit that inputs drive voltage into the electromechanical transducer element, the drive circuit outputting drive operation pattern voltage having a frequency (fd) lower than a resonance frequency (fr) of the electromechanical transducer element and lower than a frequency (fd) that maximizes moving velocity of the movable member and sticking elimination pattern voltage having a frequency lower than the frequency (fd) of the drive operation pattern voltage and in vicinity of a frequency (fd) that maximizes thrust acting on the movable member.

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Sakai, Japan

Shinichi Yamamoto