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. 09, 2016
Filed:
Nov. 18, 2014
Fujifilm Corporation, Tokyo, JP;
Osamu Iwasaki, Ashigara-kami-gun, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
A large-sized thin light guide plate has a first layer on a light exit surface side and a second layer on a rear surface side containing scattering particles at a higher particle concentration than the first layer. Thicknesses of the layers in a direction substantially perpendicular to the light exit surface change to change a combined particle concentration. The scattering particles, obtained by mixing a particle group with an average particle size Ds of less than 7 μm having one or more local maximum values and a particle group with an average particle size Db of more than 7 μm having one or more local maximum values, satisfy 1 μm≦Ds<7 μm, 7 μm<Db≦12 μm and 0.3≦a≦0.5. High light use efficiency, reduction of luminance and color unevenness, a convex brightness distribution and easy manufacture can be achieved.