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:
May. 29, 2007
Filed:
Aug. 07, 2002
Atsushi Okuyama, Saitama, JP;
Hiroyuki Kodama, Tochiqi, JP;
Masayuki Abe, Tochiqi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image display optical system according to the present invention has an illumination optical system, a plurality of image display elements, a color separation/combination optical system, and a projection optical system. The image display optical system also has a light guide element which reflects illumination light from the illumination optical system with a reflectivity of substantially 100% to guide the reflected light to the color separation/combination optical system and transmits image light from the color separation/combination optical system to the projection optical system. Each optical path of the illumination light and each optical path of the image light are different from each other in the light guide element and the color separation/combination optical system. The projection optical system is an eccentric optical system. With the configuration, the use efficiency of light can be enhanced to obtain bright and high-definition display images.