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:
Jun. 29, 2010
Filed:
Jun. 28, 2007
Kengo Kimura, Niiza, JP;
Yukinari Fukumoto, Niiza, JP;
Kengo Kimura, Niiza, JP;
Yukinari Fukumoto, Niiza, JP;
Sanken Electric Co., Ltd., Niiza-shi, JP;
Abstract
A discharge-lamp lighting apparatus includes series circuits connected to each end of a DC power source, a transformer, FETs Qp, Qn, Qp, and Qn, and a drive circuit. The drive circuit includes transistors Qand Qto discharge gate-source capacitances of the Qpand Qp, resistance elements to determine gate potentials of the transistors Qand Qwhen the transistors Qand Qare turned on, transistors Qand Qto charge the gate-source capacitances of the Qpand Qp, constant current circuits, and switches connected in series with the series circuits of the constant current circuits and resistance elements, respectively, to turn on/off the constant current circuits.