Patent ID: 7868516
Filing Date: 2011-01-11
Classification: H02N

Abstract:
1. An electrostatic actuator comprising: a stator having a plurality of stator-side electrodes; a mover having a plurality of mover-side electrodes; and a drive signal generating portion supplying predetermined drive signals between the stator-side electrodes and the mover-side electrodes, wherein the mover is moved toward a predetermined moving direction in a state of being opposed to the stator; wherein, when a direction perpendicular to the moving direction is defined to be a widthwise direction, the stator-side electrodes and the mover-side electrodes are formed into a linear pattern or a band shaped pattern along the widthwise direction; and both the stator-side electrodes and the mover-side electrodes have deformation patterns of a wavy shape or a mountain-and-valley shape at least in their portions; wherein in the stator-side electrodes and the mover-side electrodes, the deformation patterns are provided at a plurality of places along the widthwise direction; and a pitch dimension between deformation patterns mutually adjacent in the widthwise direction is formed larger at places away from a center line on the stator side and a center line on the mover side than at places nearer the center lines; and wherein the stator-side electrodes and the mover-side electrodes are formed into the same pattern shape.