摘要 |
<P>PROBLEM TO BE SOLVED: To provide a driving device with less power consumption, by regulating any of voltage levels in two-phase AC voltages to be applied to an actuator body in accordance with an operating condition. <P>SOLUTION: The driving device 1 is equipped with an actuator body 4 constituted by using a piezoelectric element; an ultrasonic actuator 2 mounted on the actuator body 4 with driving units 8, 8 to output driving power when moved by the vibration of the actuator body 4; and a controller 10 to generate the vibration in the actuator body 4, by applying first and second AC voltages of the same frequencies and different phases to the piezoelectric element. The controller 10 regulates the first and the second AC voltages to have the different voltage levels, respectively. <P>COPYRIGHT: (C)2010,JPO&INPIT |