公开(公告)号：CA2133242A1

公开(公告)日：1995-04-07

申请号：CA2133242

申请日：1994-09-29

Applicant: THOMSON CONSUMER ELECTRONICS

Inventor： RIDDLE GEORGE H N ,  DATTA PABITRA ,  FRIEL RONALD N ,  MCCARTHY DENNIS R ,  MOSCONY JOHN J ,  POLINIAK EUGENE S ,  RITT PETER M ,  SIMMS ROBERT E ,  STEINMETZ CARL C ,  STORK HARRY R ,  WETZEL CHARLES M

IPC: H01J9/20 ,  B05B5/047 ,  G03C5/00 ,  G03G15/08 ,  H01J9/22 ,  H01J9/227

Abstract: An apparatus (200) for developing a latent image formed on a photoreceptor, which is deposited on an interior surface of a faceplate panel (12) of a CRT display device (10), is disclosed. The developing apparatus includes a developing chamber (202), having a support surface (204) for supporting the panel, a screen structure material reservoir (222) for storing, deagglomerating and feeding the screen structure material (226), and a triboelectric gun assembly (236) communicating with the reservoir. The gun assembly triboelectric charges and imparts a desired charge polarity to the screen structure material. The gun assembly further includes at least one material dispersing nozzle (238) spaced from the support surface, for distributing the charged material for deposition onto the latent image.

公开(公告)号：CA2042791A1

公开(公告)日：1991-12-27

申请号：CA2042791

申请日：1991-05-16

Applicant: THOMSON CONSUMER ELECTRONICS

Inventor： WETZEL CHARLES M ,  RITT PETER M ,  ROBERTS OWEN H JR ,  STORK HARRY R

IPC: H01J9/22 ,  H01J9/227

Abstract: RCA 86,064 The method of electrophotographically manufacturing a luminescent screen on a substrate of a color CRT includes the steps of forming a photoreceptor by sequentially coating the substrate to form a conductive layer and an overcoating of a photoconductive layer, establishing an electrostatic charge on the photoconductive layer, and exposing selected areas of the photoconductive layer to visible light to affect the charge thereon. Then, the photoconductive layer is developed by the application of suitable triboelectrically-charged, dry-powdered screen structure materials. At least one wear-resistant, conductive contact patch is provided on a peripheral portion of a surface of the substrate. The contact patch has a first portion which underlies at least one of the layers of the photoreceptor and is in electrical contact with the conductive layer, and a second portion which extends from the photoreceptor. The contact patch is utilized during the manufacturing process to electrically ground the conductive layer during charging of the photoconductive layer. The contact patch also is utilized to measure the charge on the photoconductive layer during the developing process. Additionally, the contact patch provides an electrical contact, in the finished tube, between an aluminized layer on the screen and at least one support for a shadow mask.

公开(公告)号：PL174946B1

公开(公告)日：1998-10-30

申请号：PL30531594

申请日：1994-10-05

Applicant: THOMSON CONSUMER ELECTRONICS

Inventor： RIDDLE GEORGE H N ,  DATTA PABITRA ,  FRIEL RONALD N ,  MCCARTHY DENNIS R ,  MOSCONY JOHN J ,  POLINIAK EUGENE S ,  RITT PETER M ,  SIMMS ROBERT E ,  STEINMETZ CARL C ,  STORK HARRY R ,  WETZEL CHARLES M

IPC: B05B5/047 ,  G03C5/00 ,  H01J9/20 ,  G03G15/08 ,  H01J9/22 ,  H01J9/227

Abstract: An apparatus (200) for developing a latent image formed on a photoreceptor, which is deposited on an interior surface of a faceplate panel (12) of a CRT display device (10), is disclosed. The developing apparatus includes a developing chamber (202), having a support surface (204) for supporting the panel, a screen structure material reservoir (222) for storing, deagglomerating and feeding the screen structure material (226), and a triboelectric gun assembly (236) communicating with the reservoir. The gun assembly triboelectric charges and imparts a desired charge polarity to the screen structure material. The gun assembly further includes at least one material dispersing nozzle (238) spaced from the support surface, for distributing the charged material for deposition onto the latent image.