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:
Feb. 14, 2006
Filed:
Jun. 06, 2003
Kenichiro Takahashi, Osaka, JP;
Satoshi Kominami, Osaka, JP;
Kouji Miyazaki, Osaka, JP;
Toshiaki Kurachi, Osaka, JP;
Yoko Matsubayashi, Nara, JP;
Mamoru Takeda, Kyoto, JP;
Kenichiro Takahashi, Osaka, JP;
Satoshi Kominami, Osaka, JP;
Kouji Miyazaki, Osaka, JP;
Toshiaki Kurachi, Osaka, JP;
Yoko Matsubayashi, Nara, JP;
Mamoru Takeda, Kyoto, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An electrodeless discharge lamp operating device including an electrodeless discharge lampand a ballast circuit, wherein the ballast circuitincludes: an AC-DC converterfor converting a phase-controlled AC voltage into a DC voltage; a DC-AC converterformed so as to intermittently drive the electrodeless discharge lampdue to the existence of an operating period during which a high-frequency voltage is applied to the electrodeless discharge lampso that the electrodeless discharge lampis operated, and an extinguishing period during which the generation of the high-frequency voltage is stopped so that the electrodeless discharge lampis extinguished; and a dimming controllerfor detecting the turn-on of the phase-controlled AC voltage, for outputting an intermittent command signal that changes the ratio between the operating period and the extinguishing period to the DC-AC converter, and for outputting a signal that maintains an intermittent dimmable operating state even if dimming state is in full illumination.