Diffusing film comprising transparent resin and scatterers
AssigneeFuji Photo Film Co., Ltd.
InventorYoji Ito
Life of this patent
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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.
Claims20
A diffusing film comprising a transparent resin in which scatterers are dispersed, wherein 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, and wherein scatterers are flat particles having particle sizes in the range of 0.1 to 50 μm.
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 scatters which have particle size of 0.1 to 50 μm.
A polarizing plate comprising a pair of protective films and a polarizing membrane provided between them, wherein one of the protective films is a diffusing film comprising a transparent resin in which scatterers are dispersed, wherein 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, and wherein scatterers are flat particles having particle sizes in the range of 0.1 to 50 μm.
A liquid crystal display of transmission type comprising a pair of polarizing plates and a liquid crystal cell provided between them, wherein the polarizing plate comprises a pair of protective films and a polarizing membrane provided between them, and the protective film on the screen side is a diffusing film comprising a transparent resin in which scatterers are dispersed, wherein 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, and wherein scatterers are flat particles having particle sizes in the range of 0.1 to 50 μm.
A liquid crystal display of reflection type comprising a reflection board, a liquid crystal cell and a polarizing plate in this order, wherein the polarizing plate comprises a pair of protective films and a polarizing membrane provided between them, and the protective film on the screen side is a diffusing film comprising a transparent resin in which scatterers are dispersed, wherein 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, and wherein scatterers are flat particles having particle sizes in the range of 0.1 to 50 μm.
Dependencies are inferred from the claim text.