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:
May. 21, 2002
Filed:
Jun. 19, 2000
Noboru Yamamoto, Kariya, JP;
Yasutoshi Horii, Nagoya, JP;
Hiroaki Okuchi, Anjo, JP;
Hiromi Hiramatsu, Kariya, JP;
Kenji Yoneima, Anjo, JP;
Yuji Kajita, Chita-gun, JP;
Masamichi Ishikawa, Hekinan, JP;
Goichi Oda, Shimizu, JP;
Tomoyuki Ichikawa, Shimizu, JP;
Yukinobu Hiranaka, Shimizu, JP;
Yasushi Noyori, Shimizu, JP;
Denso Corporation, Kariya, JP;
Abstract
A hybrid IC of electronic circuit for a discharge lamp is disposed on the bottom of a metal case. A transformer, an inductor, a transformer, and a capacitor are disposed in a resin case. The resin case is contained in a metal case. In this instance, the transformer, the inductor, the transformer, and the capacitor are located outside the outer periphery of the IC so that the IC does not overlap on the transformer and other components. The transformer for a starter circuit has a secondary winding the inductance of which is 2.5 mH or larger, and a capacitance of a smoothing capacitor of a DC—DC converter is 0.5 &mgr;F or smaller. The switching frequency f of a MOS transistor is selected so that L2×C1 is equal to or larger than 1×10 ×f .