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:
Nov. 22, 2005
Filed:
Sep. 30, 2002
Yoshimasa Fushimi, Neyagawa, JP;
Yoshihiro Masumoto, Kobe, JP;
Mitsuhiro Wada, Katano, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A small projection display apparatus which suppresses optical paths of incident and output light in a reflection valve from overlapping; and a rear projector and a multi-vision system using the same. The projection display apparatus includes an illumination optical system for collecting light radiated, forming illumination light, a reflection type light valve for reflecting the illumination light to output modulated light forming an optical image, a projection lens system for projecting an optical image formed by the reflection type light valve, and a lens element. The lens element is composed of one plano-convex lens, and is placed between the valve and the projection lens system with a convex surface directed to the projection lens system. The illumination light passes through the lens element to illuminate the reflection type light valve, and the modulated light output passes through the lens to be incident upon the projection lens system.