Patent ID: 6582783
Filing Date: 2003-06-24
Classification: C09K,G02B,G02F,G09F

Abstract:
A laminated film which comprises (1) an anisotropic light-scattering layer and (2) at least one transparent resin layer laminated on at least one side of the light-scattering layer, wherein the light-scattering layer is composed of a continuous phase of crystalline or non-crystalline resin and a particulate dispersed phase of non-crystalline resin, which phases differ in the index of refraction from each other, the mean aspect ratio of the particulate dispersed phase is 5 to 1000 and the major axis of the particulate dispersed phase is oriented in a direction, and wherein the transparent resin layer is composed of the same kind of resin as one of those constituting the continuous layer,the film diffusing incident light in its advance direction and having a light-scattering characteristic F(&thgr;) satisfying the following expression, which represents the relationship between the angle of light scattering &thgr; and the intensity of scattered light F over a range of &thgr;=2 to 30Â°, Fy(&thgr;)/Fx(&thgr;)>10 wherein Fx(&thgr;) represents the light-scattering characteristic in the direction of the major axis of the particulate dispersed phase and Fy(&thgr;) represents the light-scattering characteristic in the direction normal to the major axis of the particulate dispersed phase.