Patent ID: 7339732
Filing Date: 2008-03-04
Classification: G02B,G03B

Abstract:
1. Rear-projection screen that comprises at least one light-scattering polymethyl methacrylate layer, the rear-projection screen comprising: a polymethyl methacrylate matrix; spherical scattering particles (A); and spherical particles (B) with a median particle size V wherein the spherical scattering particles (A) have a median size V wherein the spherical particles (B) have a median size V50 in the range from 10 to 150 μm, the difference between the refractive index of the spherical particles (B) and that of the polymethyl methacrylate matrix being in the range from 0 to 0.2, and wherein the total concentration of the spherical scattering particles (A) and particles (B) is in the range from 1 to 60% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, wherein the concentration of the spherical scattering particles (A) c wherein the thickness of the light-scattering polymethyl methacrylate layer d