Patent ID: 8564170
Filing Date: 2013-10-22
Classification: H02N

Abstract:
1. A vibration power generator comprising: a first substrate; a first electrode disposed over at least one surface of the first substrate; a second substrate opposed to the first substrate with distance from the first substrate; and a second electrode disposed over the second substrate to be opposed to the first electrode, wherein the first substrate is capable of vibrating with respect to the second substrate, any one of the first electrode and the second electrode comprises a film holding electric charge, the power can be generated with use of a change in overlapped area viewed in a direction perpendicular to surfaces with the first electrode and the second electrode formed thereover, which further comprises: a third electrode disposed at each of both ends of the surface of the first substrate with the first electrode formed, in a vibrational direction of the first substrate, and a fourth electrode disposed at each of both ends of the surface of the second substrate with the second electrode formed, in the vibrational direction of the first substrate, wherein the third electrode and the fourth electrode comprise a film holding the electric charge with the same polarity, and wherein, in a cross section taken along in the vibrational direction of the first substrate, an angle formed between a segment connecting a centroid of the third electrode positioned at one end and a centroid of the fourth electrode positioned at the one end, and a half line extending from the centroid of the fourth electrode positioned at the one end toward the fourth electrode positioned at the other end in parallel to the main surface of the second substrate does not exceed 55 degrees while the first substrate is stationary and vibrates, and wherein another angle formed between a segment connecting a centroid of the third electrode positioned at the other end and a centroid of the fourth electrode positioned at the other end, and a half line extending from the centroid of the fourth electrode positioned at the other end toward the fourth electrode positioned at the one end in parallel to the main surface of the second substrate does not exceed 55 degrees while the first substrate is stationary and vibrates.