Patent ID: 9287804
Filing Date: 2016-03-15
CPC Classification: H02N

Claim Text:
1. A power generation apparatus comprising: a dielectric; a movable member being opposed to the dielectric with a predetermined distance; an electret and an opposing electrode that are formed on the surface of the movable member facing the dielectric so as to generate a fringe electric field penetrating into the dielectric between the electret and opposing electrode when the moveable member is in a first position relative to the dielectric; and a metal layer formed on the surface of the dielectric facing the movable member so as to prevent the fringe electric field from penetrating into the dielectric when the moveable member is in a second position relative to the dielectric wherein when the volume occupancy of the dielectric between the electret and the opposing electrode varies in accordance with a displacement of the movable member, the power generation apparatus outputs the electric charge induced in the opposing electrode as electric current.