Patent ID: 6876126
Filing Date: 2005-04-05
Classification: H02N

Abstract:
1. An actuator comprising: a first piezoelectric device serving as a driving source when a driving signal is applied in a polarization direction thereof; a second piezoelectric device disposed for crossing the first piezoelectric device at a predetermined angle and for serving as a driving source when a driving signal is applied in a polarization direction thereof; a driving member provided at a crossing point of the first and second piezoelectric devices and connected to top ends of the first and second piezoelectric devices; two driving units respectively supplying driving signals to the first and second piezoelectric devices including the following three elements (a), (b) and (c): a first controller for applying the driving signals from the driving units to the first and second piezoelectric devices with a predetermined phase difference so that the driving member is moved for trailing an ellipse or a circle and a driven object contacting to the driving member is mechanically driven.