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:
Dec. 06, 2011
Filed:
Sep. 07, 2007
Applicants:
Satoshi Maeda, Kawasaki, JP;
Hirokazu Aritake, Kawasaki, JP;
Inventors:
Satoshi Maeda, Kawasaki, JP;
Hirokazu Aritake, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V 7/04 (2006.01); F21V 7/22 (2006.01);
U.S. Cl.
CPC ...
Abstract
An illumination device which can be used as a front light or a back light by improving brightness unevenness in the vicinity of an LED without dropping entire brightness and a liquid crystal display device using the same. This illumination devicehas a light source on a light entering faceof a light guide plateand a light guide platein which prismsfor reflecting by polarization or emitting light out of the light guide plateare formed on a light emission face or a light reflecting face thereof and a cylindrical lensfor orienting and magnifying light is formed on the other face.