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:
Mar. 04, 2008
Filed:
Dec. 06, 2005
Nanu Brates, Winchester, MA (US);
Jakob Maya, Brookline, MA (US);
John C. Chamberlain, Somerville, MA (US);
Shinichi Anami, Wellesley, MA (US);
Nanu Brates, Winchester, MA (US);
Jakob Maya, Brookline, MA (US);
John C. Chamberlain, Somerville, MA (US);
Shinichi Anami, Wellesley, MA (US);
Matsushita Electric Works Ltd., Osaka, JP;
Abstract
A lamp ballast for operating a high intensity discharge lamp includes an electronic ballast circuit to supply an operating voltage to the discharge lamp, and an igniter circuit to supply starting pulses to the discharge lamp in a cold state and to supply hot restrike pulses to the discharge lamp when the discharge lamp is in a hot state following turn-off. The hot restrike pulses are sufficient to maintain ionization in the discharge lamp but do not cause the discharge lamp to generate substantial light output.