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:
Feb. 24, 2015
Filed:
Mar. 03, 2010
Michio Kobayashi, Tokyo, JP;
Michio Kobayashi, Tokyo, JP;
NEC Display Solutions, Ltd., Tokyo, JP;
Abstract
In order to minimize a change in the luminance of a projected image caused by a lamp refreshing process, projectoraccording to the present invention includes lamp refreshing controllerwhich, upon detecting that the lighting power of lampis lower than rated power thereof for a given period of time, increases the lighting power of lampto the rated power and, after elapse of a predetermined period of time, reduces the lighting power to an original level thereof, and aperture data generatorwhich controls the aperture of optical diaphragmdepending on a change in the lighting power to keep constant the amount of light passing through optical diaphragm