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:
Jan. 24, 2006
Filed:
Aug. 08, 2003
Applicant:
Hitomu Watanabe, Tokyo-To, JP;
Inventor:
Hitomu Watanabe, Tokyo-To, JP;
Assignee:
Dai Nippon Printing Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/60 (2006.01); G03B 21/56 (2006.01); G02B 3/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A Fresnel lens sheet includes: a sheet-shaped base; multiple first prisms with substantially triangular cross-sections formed on a light-source-side surface of the base; and multiple second prisms with substantially triangular cross-sections formed on a viewing-side surface of the base. Rear projection screens including such Fresnel lens sheets are also provided.