Patent ID: 8480242

Claim:
A method for manufacturing optical sheet having a plurality of layers in which at least one layer is an optical functional sheet layer comprising: light-transmissive portions configured to be arranged in a row along the surface of a base material layer; and light-absorbing portions arranged between the light-transmissive portions, the method comprising the steps of: forming the light-transmissive portions on one side of the base material layer; and forming the light-absorbing portions by repeatedly carrying out, in each of the gaps between the light-transmissive portions, filling of a binder made of a resin in which light particles are dispersed and curing of the binder, wherein at least the last step of the repeating step for forming the light-absorbing portions is carried out so that the density of the light-absorbing particles contained in the binder is lower than the density of the same at the first step for forming the light-absorbing portions.