Patent ID: 9541681
Date: 2017-01-10
CPC Classifications: G02B,H01L

Claim:
1. A light extraction sheet comprising: a transparent resin film and provided thereon, a light scatter layer containing a first binder resin and light scattering particles with an average particle size of from 0.2 to 1.0 μm dispersed in the first binder resin, and a concavo-convex layer containing a second binder resin and spherical particles with an average particle size of from 3 to 10 μm, wherein a content of the spherical particles in the concavo-convex layer is from 20 to 70% by volume of the second binder resin, wherein the sheet has a haze of not less than 98%, and wherein the light scatter layer and the concavo-convex layer are disposed on a same side of the transparent resin film, and the light scatter layer is disposed between the transparent resin film and the concavo-convex layer.