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:
Aug. 31, 2010
Filed:
Jun. 13, 2008
Tetsuro Ikeda, Osaka, JP;
Kenzo Danjo, Osaka, JP;
Hiroki Morimoto, Osaka, JP;
Sansha Electric Manufacturing Co., Ltd., Osaka, JP;
Abstract
Lighting of a discharge lamp is controlled in a manner to reduce deterioration of the discharge lamp subjected to high temperature and extend the lifetime of the discharge lamp. A method for controlling lighting of the discharge lamp includes a first constant current control process (period T, which corresponds to steps Sand S) in which constant current control is executed by supplying a first current to the discharge lamp, a second constant current control process (period T, which corresponds to steps Sand S) in which constant current control is executed by supplying a second current greater than the first current to the discharge lamp after the first constant current control process, and a constant power control process (period T) in which constant power control is executed after the second constant current control process.