EP 1660935 A1 20060531 - DIFFUSER DISK FOR LCD APPLICATIONS, METHOD FOR THE PRODUCTION AND USE THEREOF
Title (en)
DIFFUSER DISK FOR LCD APPLICATIONS, METHOD FOR THE PRODUCTION AND USE THEREOF
Title (de)
STREUSCHEIBE FÜR LCD-ANWENDUNGEN, VERFAHREN ZU DEREN HERSTELLUNG UND VERWENDUNG
Title (fr)
DIFFUSEUR POUR APPLICATIONS LCD, PROCEDE DE PRODUCTION CORRESPONDANT ET UTILISATION
Publication
Application
Priority
- EP 2004005058 W 20040512
- DE 10336130 A 20030804
Abstract (en)
[origin: DE10336130A1] 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).
IPC 1-7
IPC 8 full level
G02B 5/02 (2006.01); G02F 1/1335 (2006.01); G02F 1/13357 (2006.01)
CPC (source: EP KR US)
C08L 33/12 (2013.01 - KR); G02B 5/0221 (2013.01 - EP KR US); G02B 5/0242 (2013.01 - EP KR US); G02B 5/0278 (2013.01 - EP KR US); G02B 5/0294 (2013.01 - EP KR US); G02F 1/1336 (2013.01 - KR); G03B 21/62 (2013.01 - EP KR US); G02F 1/1336 (2013.01 - EP US); Y10T 428/25 (2015.01 - EP US); Y10T 428/254 (2015.01 - EP US); Y10T 428/258 (2015.01 - EP US); Y10T 428/31855 (2015.04 - EP US)
Citation (search report)
See references of WO 2005022245A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
DE 10336130 A1 20050224; AU 2004269463 A1 20050310; AU 2004269463 B2 20100520; BR PI0413302 A 20061010; CA 2534538 A1 20050310; CN 100541283 C 20090916; CN 1829936 A 20060906; EP 1660935 A1 20060531; HK 1094044 A1 20070316; JP 2007501425 A 20070125; KR 20060056365 A 20060524; MX PA06001067 A 20060411; NZ 545549 A 20100129; RU 2006106618 A 20060827; RU 2359298 C2 20090620; TW 200523645 A 20050716; US 2006240200 A1 20061026; US 7629041 B2 20091208; WO 2005022245 A1 20050310; ZA 200601021 B 20071128
DOCDB simple family (application)
DE 10336130 A 20030804; AU 2004269463 A 20040512; BR PI0413302 A 20040512; CA 2534538 A 20040512; CN 200480021703 A 20040512; EP 04732288 A 20040512; EP 2004005058 W 20040512; HK 07100701 A 20070119; JP 2006522241 A 20040512; KR 20067002393 A 20060203; MX PA06001067 A 20040512; NZ 54554904 A 20040512; RU 2006106618 A 20040512; TW 93123019 A 20040730; US 56624904 A 20040512; ZA 200601021 A 20060203