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:
Jul. 26, 2005
Filed:
Jun. 25, 2003
Huang-chang Hsu, Taoyuan, TW;
Ching-chang Hsieh, Taoyuan, TW;
Chao-jung Lin, Bade, TW;
Cheng-hsiu LU, Taoyuan, TW;
Huang-Chang Hsu, Taoyuan, TW;
Ching-Chang Hsieh, Taoyuan, TW;
Chao-Jung Lin, Bade, TW;
Cheng-Hsiu Lu, Taoyuan, TW;
Darfon Electronics Corp., Taoyuan, TW;
Abstract
An inverter for driving multiple discharge lamps. The inverter has a transformer for driving a first discharge lamp and a second discharge lamp. The inverter also includes a first balancing circuit connected in series with the first discharge lamp and a second balancing circuit connected in series with the second discharge lamp. According to a matching signal, the first and the second balancing circuits adjust a first lamp current through the first discharge lamp and a second lamp current through the second discharge lamp, respectively. A comparator is provided to receive a first sensing signal from the first balancing circuit and a second sensing signal from the second balancing circuit. Comparing the first sensing signal with the second sensing signal, the comparator generates the matching signal which controls the first and the second balancing circuits to equalize the first lamp current and the second lamp current.