METHOD OF DRIVING VIBRATION ACTUATOR, DRIVE DEVICE

专利名称：METHOD OF DRIVING VIBRATION

ACTUATOR, DRIVE DEVICE, AND IMAGEPICKUP APPARATUS

发明人：Akio ATSUTA申请号：US15504817申请日：20151006

公开号：US20170279380A1公开日：20170928

专利附图：

摘要：A drive device for a vibration actuator, which makes it possible to perform low-speed and stable driving and expand a dynamic range of driving speed. A first switching

circuit and a second switching circuit apply a first drive signal and a second drive signal forexciting vibration, to an electromechanical energy conversion element of a vibrating body.A position detection sensor acquires information on a relative position between thevibrating body and a driven body in pressure contact with each other. An MPU switchesthe first and second drive signal to a third drive signal and a fourth drive signal,

respectively, based on the acquired information, to thereby change a position at which alargest one of peaks of amplitude of vibration excited in the vibrating body is formed.

申请人：CANON KABUSHIKI KAISHA

地址：Tokyo JP

国籍：JP

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