| 摘要 |
<p>The invention relates to diffuser disks for LCD applications, comprising at least one light-diffusing polymethylmethacrylate layer, which has a polymethylmethacrylate matrix and 0.5 % by weight to 59.5 % by weight, with regard to the weight of the light-diffusing polymethylmethacrylate layer, of spherical diffusing particles (A), which have an average particle size V50 ranging from 0.1 to 40 mum and a refractive index difference from the polymethylmethacrylate matrix ranging from 0.02 to 0.2, and 0.5 % by weight to 59.5 % by weight, with regard to the weight of the light-diffusing polymethylmethacrylate layer, of spherical particles (B), which have an average particle size V 50 ranging from 10 to 150 mum and a refractive index difference from the polymethylmethacrylate matrix ranging from 0 to 0.2, whereby the total concentration of the spherical diffusing particles (A) and particles (B) ranges from 1 to 60 % by weight with regard to the weight of the light-diffusing polymethylmethacrylate layer, and the spherical diffusion particles (A) and the spherical particles (B) have a different average particle size V50, whereby the diffuser disks have a transmission ranging from 20 % to 70 % and a diffusion coefficient factor greater than 0.3, and the ratio of the square of the average surface roughness of the polymethylmethacrylate layer Rz to the cube of the particle size of the spherical particles (B) RZ2/DPB3 ranges from 0.0002 mum-1 to 0.1300 mum- 1.</p> |
