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. 22, 2014
Filed:
Jun. 23, 2011
Megumi Fujita, Tokyo, JP;
Hiroyasu Inoue, Tokyo, JP;
Megumi Fujita, Tokyo, JP;
Hiroyasu Inoue, Tokyo, JP;
Zeon Corporation, Tokyo, JP;
Abstract
A surface light source device including: an organic EL element having a light-emitting surface for emitting light; and a light output surface structure layer provided on the organic EL element on a side of the light-emitting surface, wherein the light output surface structure layer includes concave portions which are relatively recessed and convex portions which are relatively projected, the concave portions and convex portions being provided on a surface opposite to the organic electroluminescent element in an alternate manner along an in-plane direction parallel to the surface, and the bottom of the concave portion and the top of the convex portion that are adjacent to each other are distant with distances in a thickness direction of the surface light source device, the distances being made uneven with a standard deviation range of not less than 0.05 μm.