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:
Oct. 03, 2006
Filed:
Jan. 10, 2006
Hiroki Abe, Suwa, JP;
Tomoo Fujimori, Suwa, JP;
Motoo Takahashi, Tokyo, JP;
Kenji Samejima, Tokyo, JP;
Hiroki Abe, Suwa, JP;
Tomoo Fujimori, Suwa, JP;
Motoo Takahashi, Tokyo, JP;
Kenji Samejima, Tokyo, JP;
Chinontec Kabushiki Kaisha, Nagano, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
The invention provides a projector having a light source, a display device to modulate light emitted from the light source, a lens device to project light emitted from the light source via the display device, wherein the lens device has a diaphragm mechanism formed having an aperture, an ambient light illuminance detector to measure illuminance of ambient light, a projected image illuminance detector to measure illuminance of an image projected on the screen, an illuminance comparator to compare an illuminance detected by the ambient light illuminance detector and an illuminance detected by the projected image illuminance detector, and a diaphragm mechanism/image signal controller to control an intensity of image signals input into the display device and to control a size of an opening of the aperture of the diaphragm mechanism in accordance with a result of comparison by the illuminance comparator.