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:
Jun. 04, 2013
Filed:
Dec. 28, 2007
Applicants:
Satoru Hamada, Tokyo, JP;
Hiroshi Yamamoto, Tokyo, JP;
Junichi Sawanobori, Yamanashi, JP;
Inventors:
Assignee:
Dai Nippon Printing Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/1335 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical sheet is structured to have a translucent substrate, an optical elementprovided on one surface Sof the translucent substrate, on which a plurality of unit prismsor unit lenses are arranged, and a light diffusion layer provided between the one surface Sand the optical elementand/or on another surface Sof the translucent substrate, and at least one of the light diffusion layerincludes gap partsas a light diffusion element. At this time, the gap partsis preferably in an approximately oval shape oriented in a uniaxial direction in plan view.