公开(公告)号：EP1774558A1

公开(公告)日：2007-04-18

申请号：EP04757423.1

申请日：2004-08-05

申请人： Thomson Licensing SAS

发明人： PARSAPOUR, Farzad ,  GUNTURI, Bhanumurthy, Venkatrama, Subrahmanya ,  COLBERT, Steven, Anthony ,  COLLINS, Brian, Thomas

IPC分类号： H01J29/88

CPC分类号： H01J9/20 ,  H01J9/244 ,  H01J29/88 ,  H01J29/898

摘要： A composition and method of forming an enhanced internal neutral density filter on a luminescent screen assembly of a cathode ray tube (CRT) is disclosed. The luminescent screen assembly is formed on an interior surface of a glass faceplate panel of the CRT tube. The luminescent screen assembly includes a patterned light-absorbing matrix that defines three sets of fields corresponding to one of a blue region, a green region and a red region. An enhanced internal neutral density filter is formed on the light-absorbing matrix. An array of blue, green and red color phosphors is formed on the internal neutral density filter corresponding to one of the blue region, the green region and the red region defined in the light-absorbing matrix. The enhanced internal neutral density filter has a composition including a red pigment, a blue pigment, one or more surface active agents and at least one non-pigmented oxide particle. The enhanced internal neutral density filter preferably has the surface active agent in the amount of about 0.7 to 1.2 weight % based upon the total mass in the filter.