发明名称 |
DIFFUSER DISK FOR LCD APPLICATIONS, METHOD FOR THE PRODUCTION AND USE THEREOF |
摘要 |
<p>A scattering screen for LCD applications comprises at least one light scattering polymethylmethacrylate layer comprising a polymethylmethacrylate matrix and spherical particles (A) and spherical particles (B) having different average particle sizes with at least one particle type having a refractive index that is different to that of polymethylmethacrylate matrix. A scattering screen for LCD applications comprises at least one light scattering polymethylmethacrylate layer comprising a polymethylmethacrylate matrix and 0.5-59.5 wt.% of spherical scattering particles (A) having an average particle size of 0.1-40 mu m and a refractive index that is different to that of polymethylmethacrylate matrix by 0.02-2 and 0.5-59.5 wt.% of spherical scattering particles (B) having an average particle size of 10-150 mu m and a refractive index that is different to that of polymethylmethacrylate matrix by 0-0.2 wherby the total concentration of (A) and (B) is 1-60 wt.% (with respect to the light scattering polymethylmethacrylate layer) and the particles (A) and (B) are of different average particle diameter and the screen (I) has a transmission value of 20-70% and scattering level of greater than 0.3 whereby ratio of the square of the average surface roughness of the polymethylmethacrylate layer R z to the cube of the particle size of (B) R 2> z/DPB3 is 0.0002-0.1300 mu m -> 1>. An independent claim is included for a process for the production of the screen (I) by extrusion of a composition comprising polymethylmethacrylate, particles (A) and particles (B).</p> |
申请公布号 |
EP1660935(A1) |
申请公布日期 |
2006.05.31 |
申请号 |
EP20040732288 |
申请日期 |
2004.05.12 |
申请人 |
ROEHM GMBH & CO. KG |
发明人 |
PARUSEL, MARKUS;DR. SCHMIDT, JANN;GROOTHUES, HERBERT |
分类号 |
G02B5/02;G02F1/1335;G02F1/13357;(IPC1-7):G02F1/133;G03B21/62 |
主分类号 |
G02B5/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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