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. 17, 2006
Filed:
Aug. 29, 2003
Applicants:
Hitomu Watanabe, Shinjuku-ku, JP;
Makoto Honda, Shinjuku-ku, JP;
Inventors:
Hitomu Watanabe, Shinjuku-ku, JP;
Makoto Honda, Shinjuku-ku, JP;
Assignee:
Dai Nippon Printing Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 3/08 (2006.01); G03B 21/60 (2006.01);
U.S. Cl.
CPC ...
Abstract
A Fresnel lens sheet has a light-receiving surface and a light-emitting surface. The light-receiving surface is provided with a plurality of prism groups, each including a plurality of straight or circular prisms. Each of the prisms of the prism groups has a total reflection surface that reflects incident light totally toward a viewing side. The height of the prisms formed in a predetermined specific region in the light-receiving surface of the Fresnel lens sheet is bigger than that of the prisms in another region.