REAR-PROJECTION SCREEN AND METHOD OF ITS PRODUCTION Russian patent published in 2008 - IPC G03B21/62 

FIELD: rear-projection screens.

SUBSTANCE: screen has, at least, one light-diffusing polymethylmethacrylate layer, 0.05 to 4 mm-thick, containing spherical polymer particles with the size of 5 to 35 mcm in concentration of 2 to 60 % by weight on the basis of total weight of light-diffusing polymethylmethacrylate layer. The difference in refractive indices of spherical polymer particles and those of polymethylmethacrylate matrix makes from 0.02 to 0.2. The concentration c_p of spherical polymer particles, thickness d_s of light-diffusing polymethylmethacrylate layer, as well as the size D_p of spherical polymer particles are selected so that the ration c_p•d_s/D_p ³ varies from 0.001,5 to 0.015% by weight•mm/mcm³. The ration of mean roughness R_a of the polymethylmethacrylate layer surface to size D_p of spherical polymer particles varies from 0.05 to 0.4.

EFFECT: higher-quality image.

20 cl, 1 dwg