The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 26, 2018
Filed:
Feb. 02, 2016
National University Corporation Tohoku University, Sendai-shi, Miyagi, JP;
Murata Manufacturing Co., Ltd., Nagaokakyo-shi, Kyoto-fu, JP;
Kanjuro Makihara, Sendai, JP;
Hitoshi Sakaguchi, Nagaokakyo, JP;
Chikahiro Horiguchi, Nagaokakyo, JP;
NATIONAL UNIVERSITY CORPORATION TOHOKU UNIVERSITY, Sendai-Shi, Miyagi, JP;
MURATA MANUFACTURING CO., LTD., Nagaokakyo-Shi, Kyoto-Fu, JP;
Abstract
A power generating device is disclosed that includes a power generating unit, an inductor, a switch connected to the inductor in series, and a control circuit. The power generating unit includes a piezoelectric element, and upper and lower electrodes disposed on surfaces of the piezoelectric element. The inductor is electrically connected to the electrodes in parallel, with the inductor and a capacitance component constituting a resonance circuit. The control circuit has a driving mode in which it controls the switch to an ON state in synchronism with the voltage generated in the piezoelectric element becoming a peak value. Further, in a rest mode, the control circuit controls the switch to be in an OFF state when the voltage generated in the piezoelectric element has the peak value.