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:
Mar. 14, 2000
Filed:
Dec. 22, 1997
Toshiyuki Hiraoka, Numazu, JP;
Masahiro Sugiyama, Gotenba, JP;
Hiroshi Kubota, Shizuoka, JP;
Takafumi Takeda, Shizuoka, JP;
Kazuyuki Yamamoto, Ito, JP;
Kabushiki Kaisha TEC, , JP;
Abstract
A power supply device and a discharge lamp lighting device which are capable of reducing high harmonic elements and improving a crest factor. A full-wave rectifying circuit is connected to a commercial AC power supply. A first capacitor, a diode and second capacitor, having a smaller capacitance than the first capacitor, are connected to the full-wave rectifying circuit. A partially smoothed circuit consisting of a charge capacitor, an inductor and a diode is connected to the second capacitor. A parallel resonance circuit and a collector-emitter of a transistor are connected to the partially smoothed circuit. The parallel resonance circuit consists of a primary winding of an inverter transformer and a first resonance capacitor. A second resonance capacitor is connected between the emitter and the collector of the transistor. Filaments of a fluorescent lamp are connected to a secondary winding of the inverter transformer. A starting capacitor is connected to the filaments.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile