Patent ID: 7321182
Filing Date: 2008-01-22
Classification: H01L,H02N

Abstract:
1. An oscillatory-wave actuator configured to form first and second standing waves having positions which are shifted according to their time of generation, wherein a traveling wave is formed by synthesis of the first and second standing waves, the actuator comprising: an elastic body configured to generate standing waves; a movable body in contact with the elastic body, wherein the movable body is driven according to the traveling wave; a first electromechanical transducer configured to form the first standing wave in response to a supplied voltage; a second electromechanical transducer configured to output a vibration-detecting voltage in response to vibration from the first standing wave; and a third electromechanical transducer configured to be supplied only with the vibration-detecting voltage and form the second standing wave in response to the vibration-detecting voltage.