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:
Apr. 02, 2013
Filed:
Aug. 02, 2010
Tetsuro Kuwayama, Chiba, JP;
Hiromasa Suzuki, Tokyo, JP;
Motosuke Ohmi, Tokyo, JP;
Masaru Minami, Kanagawa, JP;
Kanji Yokomizo, Kanagawa, JP;
Tetsuro Kuwayama, Chiba, JP;
Hiromasa Suzuki, Tokyo, JP;
Motosuke Ohmi, Tokyo, JP;
Masaru Minami, Kanagawa, JP;
Kanji Yokomizo, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A 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; and one or two or more light sources arranged on a 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, in which a projection section is arranged on one of facing surfaces of two adjacent unit light guide plates in the arrangement direction and a recession section in which the projection section is engaged is arranged on the other of the facing surfaces of the two adjacent unit light guide plates.