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:
Aug. 23, 2016
Filed:
Jul. 19, 2012
Kazuhiko Toyooka, Yamagata, JP;
Masaki Yamamuro, Tokyo, JP;
Hiroki Matsuda, Yamagata, JP;
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Abstract
A surface light source device capable of obtaining uniform and high brightness emitted light is disclosed. The surface light source device can include a light source () that emits light; a light guiding plate () that guides light from the light source that is incident on a rear surface side thereof or a side surface side thereof and emits the light from a front surface side thereof; and a diffusion plate () disposed on the front surface side of the light guiding plate that diffuses the incident light from the light guiding plate to a front surface side thereof. The diffusion plate can be made from nonwoven fabric with an areal weight of not less than 0 g/mand not more than 40 g/m.