| 摘要 |
PROBLEM TO BE SOLVED: To impart sufficient light diffusibility to a light diffusion layer without adding a large amt. of light diffusive particulates thereto in the case where this light diffusion layer is applied to a screen by using the light diffusion layer coated with specific light diffusion ink. SOLUTION: The light diffusion layer to be used for the projection screen consisting of a combination of a Fresnel lens and a lenticular sheet is obtd. by applying the light diffusion ink dispersed with the light diffusive particulates in a light transparent resin on the front surface of a transparent resin film. At this time, the light diffusive particulates are dispersed into the light transparent resin and ruggedness is formed to project from the surface. Namely, the light diffusive particulates consist of the light diffusive particulates A of an average grain size dAμm and the light diffusive particulates B of an average grain size dBμm satisfying equation I and equation II. The light diffusion layer is constituted by dispersing and compounding the light diffusive particulates A, B in and with the light transparent resin in such a manner that the light diffusive particulates B project from the surface of the light transparent resin. The thickness T of the light diffusion layer consisting of the light diffusion ink satisfies equation III.
|
