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:
Jul. 11, 2006
Filed:
Jul. 19, 2002
Satoshi Hosoda, Gifu, JP;
Satoshi Hosoda, Gifu, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A liquid crystal projector includes a reference temperature sensor, a comparison temperature sensor, and a shut-off unit for shutting off the power to a light source lamp for backlight when the difference between a temperature sensed by the reference temperature sensor and a temperature sensed by the comparison temperature sensor is more than a predetermined value. Used as the reference temperature sensor is a temperature sensor for sensing the ambient temperature of the main body of the liquid crystal projector, and used as the comparison temperature sensor is a temperature sensor for sensing the ambient temperature of a liquid crystal panel. Alternately, used as the reference temperature sensor is a temperature sensor for sensing the ambient temperature of the main body of the liquid crystal projector, and used as the comparison temperature sensor is a temperature sensor for sensing the ambient temperature of the light source lamp for backlight.