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:
Apr. 29, 2008
Filed:
Sep. 29, 2006
Masanori Umeya, Tokyo-To, JP;
Masanori Umeya, Tokyo-To, JP;
Dai Nippon Printing Co., Ltd., Tokyo, JP;
Abstract
A projection screen capable of sharply displaying an image even under bright environmental light with high image visibility. A projection screen has a polarized-light selective reflection layer with a cholesteric liquid crystalline structure, capable of selectively reflecting a specific polarized light component, and a substrate for supporting the reflection layer. Of the light entering the reflection layer from the viewer's side, the right-handed light in the selective reflection wave range is reflected from the reflection layer as reflected light. As a result of structural non-uniformity in the cholesteric liquid crystalline structure, the light that is selectively reflected (reflected light) is diffused.