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:
Aug. 25, 2009
Filed:
Dec. 16, 2005
Hiroshi Shinmen, Kitasaku-gun, JP;
Robert Weger, Wels, AT;
Hiroshi Shinmen, Kitasaku-gun, JP;
Robert Weger, Wels, AT;
Minebea Co., Ltd., Kitasaku-gun, JP;
Abstract
To provide a multiple-light discharge lamp lighting device that stabilizes and equalizes tube current of a plurality of discharge lamps without arranging a Ballast element to the secondary side of an inverter transformer with low costs. A multiple-light discharge lamp lighting deviceaccording to the present invention includes inverter meansand a plurality of inverter transformers TRto TR. Discharge lamps Lato Laare connected to secondary windings Nsto Nsn of the inverter transformers TRto TR. Preferably, variable impedance elements Zto Z, as variable inductance elements, are serially connected to primary windings Npto Npn of the plurality of inverter transformers TRto TR. Accordingly, the tube current can be stabilized and equalized without using an element resistant to a high voltage.