Patent ID: 8716916

Claim:
A vibration power generator comprising: a first substrate; a plurality of first electrodes disposed over one surface of the first substrate; a second substrate spaced from the first substrate and opposed to the one surface of the first substrate; and a plurality of second electrodes disposed over one surface of the second substrate so as to be opposed to the first electrodes, wherein one of the first electrodes and the second electrodes comprises a film holding a charge, wherein one of the first substrate and the second substrate is a vibratory substrate which vibrates with respect to the other of the first substrate and the second substrate, wherein the first electrodes and the second electrodes are configured such that an overlapped area between the first electrodes and the second electrodes viewed in the direction perpendicular to the surface of the first substrate changes at least one time in such a manner that the overlapped area becomes minimum and then increases to become maximum, or that the overlapped area becomes maximum and then decreases to become minimum, as the vibratory substrate is displaced from a center of vibration to an end of vibration, wherein an electrostatic capacity Cp formed between the first electrodes and the second electrodes when the overlapped area between the first electrodes and the second electrodes becomes a maximum changes while the vibratory substrate is displaced from the center of the vibration to the end of the vibration, and the change in electrostatic capacity Cp comprises an increase in electrostatic capacity Cp, and wherein power is generated by the change in the overlapped area between the first electrodes and the second electrodes.