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. 20, 1990
Filed:
Nov. 30, 1989
Applicant:
Inventors:
Shigeo Aoki, Habikino, JP;
Yasuhiro Ukai, Kobe, JP;
Assignee:
Hosiden Electronics Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
353 31 ; 353 37 ; 353 98 ; 353122 ;
Abstract
In projection device light from a point light source unit is reflected by a first reflecting mirror to produce parallel rays, which are applied to a color active matrix liquid crystal display unit. The parallel rays having passed through the liquid crystal display unit are converted by a second reflecting mirror into a bundle of rays of a desired solid angle for projection onto a screen.