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, 2006
Filed:
Aug. 31, 2005
Applicants:
Satoshi Maeda, Kawasaki, JP;
Hirokazu Aritake, Kawasaki, JP;
Inventors:
Satoshi Maeda, Kawasaki, JP;
Hirokazu Aritake, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
A backlight (lighting device) is arranged on a backside of a liquid crystal panel, and comprises an LED, an optical waveguide, a reflective sheet, and a prism sheet. A diffractive optical element (DOE) constituted of a binary concave and convex pattern is formed in an end surface of the optical waveguide on an LED arranged side.