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US 7,031,061 B2Granted
Diffusing film comprising transparent resin and scatterers
AssigneeFuji Photo Film Co., Ltd.
InventorYoji Ito
Life of this patent
Estimating the term…
Abstract
A diffusing film comprises a transparent resin in which scatterers are dispersed. The difference between the refractive index of the transparent resin and that of the scatterers is in the range of 0.04 to 1.5. The scatterers are flat particles having sizes of 0.1 to 50 μm.
Claims3
A process for preparation of a diffusing film comprising the steps of:
- dissolving or dispersing a transparent resin and scatterers whose refractive index differs from that of the transparent resin by 0.04 to 1.5, in a mixture of a solvent having a function of dissolving a transparent substrate and another solvent having a function of not dissolving the substrate, to prepare a coating solution;
- applying the solution onto the transparent substrate;
- and drying the solution to form a scattering layer containing flat scatterers which have particle size of 0.1 to 50 μm.
Dependencies are inferred from the claim text.