Vibration generator, vibration generation device, and electronic equipment and communication device provided with vibration generation device
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United States of America Patent
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May 6, 2014
Grant Date -
Aug 29, 2013
app pub date -
Jun 7, 2012
filing date -
Jun 10, 2011
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Abstract
A vibration power generator including a first substrate; 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 second electrodes disposed over one surface of the second substrate so as to be opposed to the first electrodes, wherein one of the first and second electrodes includes a film holding a charge; one of the first and second substrates is a vibratory substrate; and an overlapped area between the first and second electrodes becomes minimum and then maximum, or becomes maximum and minimum, and an electrostatic capacity Cp formed between the first and second electrodes when the overlapped area becomes maximum changes, and the change of Cp comprises an increase of Cp, while the vibratory substrate is displaced from the vibration center to the vibration end.
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