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. 19, 1995
Filed:
Apr. 05, 1994
Sony Corporation, Tokyo, JP;
Abstract
A projector rear is simple in structure uses reflection type liquid crystal plates to project images on a screen. R light emitted by a light source is directed to a first liquid crystal plate via a first dichroic mirror. Light reflected from the first liquid crystal plate is reflected toward a projection axis by the first dichroic mirror. B light transmitted through the first dichroic mirror is reflected by a second dichroic mirror and impinges on a second liquid crystal plate. Light reflected by this second liquid crystal plate is again reflected toward the projection axis by the second dichroic mirror. G light is made to directly enter a third liquid crystal plate. G light reflected by the third liquid crystal plate travels along the projection axis. The angular positional relations among optical elements are so set that the angle of incidence to the normal to each dichroic mirror is close to the angle of reflection.