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:
Sep. 28, 2004
Filed:
Aug. 04, 2003
Toshinori Hirobe, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A projection type display device is provided which is compact and allows an image to be displayed in appropriate colors. A color wheel is disposed in an area interposed between a light entering a total reflection mirror and a light reflected by the mirror. This makes the device compact compared to a case where the color wheel is placed in a region outside the light. Further, the color wheel is shaped like a disk divided into a plurality of color filter sections of different colors. The color wheel is irradiated with a light converged in such a shape as to pass through only a single color filter section. Consequently, the light is properly separated to allow an image to be displayed in appropriate colors.