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:
Jul. 22, 2014
Filed:
Apr. 14, 2011
Rena Nishitani, Tokyo, JP;
Tomohiro Sasagawa, Tokyo, JP;
Eiji Niikura, Tokyo, JP;
Kuniko Kojima, Tokyo, JP;
Jun Someya, Tokyo, JP;
Hiroaki Sugiura, Tokyo, JP;
Kazuhiko Tsutsumi, Tokyo, JP;
Akihiro Nagase, Tokyo, JP;
Rena Nishitani, Tokyo, JP;
Tomohiro Sasagawa, Tokyo, JP;
Eiji Niikura, Tokyo, JP;
Kuniko Kojima, Tokyo, JP;
Jun Someya, Tokyo, JP;
Hiroaki Sugiura, Tokyo, JP;
Kazuhiko Tsutsumi, Tokyo, JP;
Akihiro Nagase, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A planar light source device includes a first light source for emitting a first light ray having a punctate spatial luminance distribution; a second light source for emitting a second light ray; a first spatial luminance distribution conversion portion for changing the first light ray to a linear spatial luminance distribution; a second spatial luminance distribution conversion portion for changing a spatial luminance distribution of the first and second light rays to a planar spatial luminance distribution; wherein the first light ray is a laser light; the second light ray has a divergence angle larger than the divergence angle of the first light ray when the first light ray is emitted from the first light source; and a slow-axis direction of the first light ray entering the second spatial luminance distribution conversion portion is parallel to an outgoing direction of the planar light.