Patent ID: 8497953

Claim:
A prism sheet arranged on an emitting surface of a light guide plate in a backlight unit, the prism sheet comprising: a prism row on an incident surface, side of a light-transmissive substrate; and a light diffusion layer that contains porous particles on the emitting surface side of the light transmissive substrate; wherein the porous particles are irregular porous silica particles, the structure of which is such that primary particles are agglomerated and form agglomerated particles in indefinite-shaped form having 1 to 10 μm of the particle size, and the light diffusion layer is formed by a coating material containing a resin binder and the porous silica particles, wherein the light diffusion layer has a dry thickness of 2 to 10 μm, wherein the content of the porous particles in the light diffusion layer is 5 to 20 parts by mass relative to 100 parts by mass of the resin binder.