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:
Oct. 16, 2012
Filed:
Aug. 02, 2010
Tetsuro Kuwayama, Chiba, JP;
Tetsuro Kuwayama, Chiba, JP;
Sony Corporation, Tokyo, JP;
Abstract
The planar illumination device includes: a light guide plate formed by arranging a plurality of unit light guide plates each having a light emission surface as a front surface and a reflection surface as a back surface so that facing end surfaces of adjacent unit light guide plates of the plurality of unit light guide plates are closely arranged; one or two or more light sources arranged on a first side surface, in a direction where the plurality of unit light guide plates are arranged, of each of the plurality of unit light guide plates; and a recessed-and-projected structure arranged on a second side surface, facing the light sources, of each of the plurality of unit light guide plates and having an edge parallel to a normal to the light emission surface.