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. 25, 2007
Filed:
Aug. 03, 2005
Shinichi Suzuki, Fukuroi, JP;
Ryu Terada, Fukuroi, JP;
Shinichi Suzuki, Fukuroi, JP;
Ryu Terada, Fukuroi, JP;
Minebea Co., Ltd., Nagano-ken, JP;
Abstract
There is provided a rare gas fluorescent lamp lighting apparatus including: an input power source; a transformer having a rare gas fluorescent lamp connected to the secondary side thereof; a switching element connected in series to the primary side of the transformer; and a drive block to drive the switching element. The drive block includes: a constant voltage circuit to convert the voltage of the input power source into a constant voltage as an output; a constant current circuit to output a charging current according to the voltage of the input power source; a triangular waveform oscillation circuit to increase and decrease oscillation frequency according respectively to an increase and a decrease in a voltage of the input power source; and a comparison circuit to transform a triangular waveform outputted from the triangular waveform oscillation circuit into a rectangular waveform with a predetermined duty ratio as an output.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile