公开(公告)号：EP0495894B1

公开(公告)日：1994-02-02

申请号：EP90915927.9

申请日：1990-09-18

申请人： RCA Thomson Licensing Corporation

发明人： DATTA, Pabitra ,  McCOY, Randall, Eugene ,  FRIEL, Ronald, Norman ,  van RAALTE, John ,  STEWART, Wilber, Clarence

IPC分类号： H01J9/227

CPC分类号： H01J9/225 ,  G03G15/065 ,  G03G15/08 ,  H01J9/2276

摘要： An apparatus for electrophotographically manufacturing a luminescent screen assembly on a substrate (18), for use within a CRT includes a developer for developing a photoconductive layer (34), having a latent image thereon, with dry-powdered, triboelectrically-charged screen structure materials (48, 48'). The photoconductive layer (34) overlies a conductive layer (32) in contact with the substrate (18). A grid-developing electrode (44) is located at a distance from the photoconductive layer that is large relative to the smallest dimension of the latent image. The electrode is biased with a suitable potential, to influence the deposition of the charged screen structure materials onto the latent image on the photoconductive layer. A method for electrophotographically manufacturing the screen assembly utilizing the grid-developing electrode is also disclosed.