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:
Sep. 27, 2016
Filed:
Nov. 18, 2015
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Keisuke Seki, Osaka, JP;
Takeshi Kamoi, Kyoto, JP;
Daisuke Yamahara, Osaka, JP;
Hiroyuki Asano, Nara, JP;
Masafumi Yamamoto, Kyoto, JP;
Masato Himeda, Nara, JP;
Katsuyuki Doi, Osaka, JP;
Abstract
A lighting device includes a rectifier circuit, a conversion circuit and a control circuit. A first inductor of a first series circuit and a second inductor of a second series circuit have inductances by which a time period, during which a diode is electrically conducted, is made shorter than a half period of a resonance period of a closed loop circuit. The closed loop circuit includes a first capacitor, the first inductor, a second capacitor and a third capacitor. The control circuit is configured to control a switching element in such a manner that the switching element is turned on at fixed periods.