Patent ID: 9671528
Date: 2017-06-06
CPC Classifications: F21V,F21Y,G02B,G02F

Claim:
1. An optical sheet comprising: a sheet-like base layer; a light control layer having unit shaped elements arranged in an arrangement direction parallel to a sheet surface of the base layer, each unit shaped element extending linearly in a direction intersecting the arrangement direction of the unit shaped elements; and a light diffusing layer disposed between the base layer and the light control layer, wherein the light control layer further includes a sheet-like support layer adjacent to the light diffusing layer, and the unit shaped elements are disposed on a surface, on a side opposite to the light diffusing layer, of the sheet-like support layer, wherein a surface, on a side of the light control layer, of the light diffusing layer is a rough surface having raised portions, and the raised portions are disposed at finer pitch than the unit shaped elements; wherein the light diffusing layer has a binder resin portion and particles dispersed in the binder resin portion, and wherein the particles contained in the binder resin portion include an aggregate of aggregated single particles.