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:
Feb. 03, 1998
Filed:
Jun. 05, 1995
Shigehiko Takayama, Hachiouji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A screen for a liquid crystal projector is provided on which an image formed by the output light from a liquid crystal projector can be recognized even in the presence of extraneous light. The screen is used for a color liquid crystal projector for projecting an image formed on a liquid crystal onto the screen by causing the light from a light source to be transmitted through or reflected from the liquid crystal. Lippman-type holograms (BS, GS, RS) having great reflectances with respect to only the wavelength band of output light of the liquid crystal projector are formed on the screen. As the screen reflects substantially only the output light of the liquid crystal projector and absorbs light having other wavelengths, the reflection of extraneous light is suppressed as much as possible. Therefore, the image projected by the liquid crystal projector is recognizable even in the presence of extraneous light.