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:
Nov. 12, 2013
Filed:
May. 26, 2009
Katsuyoshi Nakada, Yawata, JP;
Tomoyuki Nakano, Sakai, JP;
Junichi Hasegawa, Kashiwara, JP;
Koji Watanabe, Yawata, JP;
Katsuyoshi Nakada, Yawata, JP;
Tomoyuki Nakano, Sakai, JP;
Junichi Hasegawa, Kashiwara, JP;
Koji Watanabe, Yawata, JP;
Panasonic Corporation, Osaka, JP;
Abstract
In order to suppress a peak of an excessive current and suppress a variation in a resonance voltage of a resonator, which are likely to occur immediately after a discharge lamp starts lighting, in a case where a high-frequency current continuously flows asymmetrically with respect to a zero current instead of flowing symmetrically on positive and negative sides immediately after the lighting since electrodes of the discharge lamp are not evenly warmed, the resonance voltage and the high-frequency current are finely adjusted in a resonance voltage and high-frequency current setting method including setting a drive frequency of an inverter circuit and varying output from a down-converter.