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:
Mar. 18, 2008
Filed:
Apr. 26, 2007
Makoto Fuse, Matsumoto, JP;
Makoto Fuse, Matsumoto, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
Aspects of the invention can provide a projector capable of projecting a high-quality image by illumination that does not produce a difference in size among illumination areas for respective colors including red, green, and blue. A light-source light from a light source can be separated into color lights by first and second dichroic mirrors provided in a color separation system, which independently go incident on corresponding liquid crystal light valves as illumination lights. Herein, a mutual chromatic aberration can be corrected by adjusting, as needed, the radii of curvature of respective field lenses provided in the color separation system for use in adjusting angles of incidence of illumination lights with respect to the liquid crystal light valves. This configuration makes it possible to illuminate the respective liquid crystal light valves by illumination areas of exactly the same size, which in turn enables a high-quality image having no display shadow to be projected.