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:
Jun. 12, 2007
Filed:
Mar. 24, 2005
Restraining temperature rise in light exiting-side polarizer constituting liquid crystal light valve
Miki Nagano, Shiojiri, JP;
Miki Nagano, Shiojiri, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
Embodiments of the invention restrain temperature rise in a light exiting-side polarizer included in a liquid crystal light valve without limiting the quantity of light incident on the liquid crystal light valve and a projector that has a liquid crystal light valve to modulate incident light in accordance with a provided image signal and that projects an image represented by modulated light exiting from the liquid crystal light valve. The projector has a black level adjusting unit to adjust black level of the image signal, a temperature-detecting unit to detect temperature of the light exiting-side polarizer, and a control unit to control operation of the black level-adjusting unit. The control unit is characterized by causing the black level-adjusting unit to adjust the black level of the image signal on the basis of the temperature detected by the temperature-detecting unit in order to restrain temperature rise in the light exiting-side polarizer.