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:
Nov. 04, 2003
Filed:
Aug. 27, 2002
Koichi Toyama, Kariya, JP;
Hironao Yamaguchi, Gamagori, JP;
Denso Corporation, Kariya, JP;
Abstract
Providing a discharge lamp device to reduce noise radiation and to reduce a surge pulse current resulting from a shield sheath involves providing a ballast, including a DC/DC conversion circuit for boosting a direct current voltage from a battery, an inverter circuit for converting the voltage boosted by the DC/DC conversion circuit into an alternating current voltage, a starting circuit having a second transformer for boosting to such a voltage that causes a breakdown between electrodes of a lamp in starting up the lamp, and a metal case for accommodating the DC/DC conversion circuit, the inverter circuit, and the starting circuit. A secondary winding of the second transformer of the starting circuit is connected between the lamp and the inverter circuit connected to the lamp. An electrode member is interposed between the second transformer and the metal case.