Patent ID: 8488079

Claim:
An optical sheet for use as a display device surface, which has a functional layer on at least one side of a transparent base material and has a diffusion factor on the outer surface and/or interior of the functional layer, wherein said functional layer comprises a resin composition, comprising a surfactant and translucent inorganic particles and/or translucent organic particles which provide concavoconvexities on the surface of the functional layer, coated on one side of said transparent base material to form said functional layer and said optical sheet satisfies the relationship represented by the following formula: 2.1 <Q/U< 21.4, where Q (regular transmission intensity): is diffuse transmission intensity at 0 degrees, and U (virtual regular transmission intensity): is transmission intensity which is a straight line connecting the transmission intensities at diffusion regular transmission ±2 degrees and diffusion regular transmission ±1 degree, extrapolated from the diffuse regular transmission angle.