Method of electrographically manufacturing a luminescent screen

Details Method of electrographically manufacturing a luminescent screen Method of electrographically manufacturing a luminescent screen

1997-03-11

1998-10-27

Goodrow, John

Radiation imagery chemistry: process, composition, or product th

Producing cathode-ray tube or element thereof

Using specified radiation-sensitive composition other than a...

430 23, G03C 500

Patent

active

058276289

ABSTRACT:
The method of electrophotographically manufacturing a screen on an interior surface of a faceplate for a CRT, according to the present invention comprises the steps of first-coating the faceplate with a volatilizable conductive layer, second-coating the conductive layer with the first photoconductive layer including a dye sensitive to ultraviolet rays, third-coating the ultraviolet-photoconductive layer with a second photoconductive layer including a dye sensitive to visible light, charging the whole area of the second photoconductive layer by exposing the whole surface of the second photoconductive layer to visible light while applying a suitable DC voltage between the conductive layer and the second photoconductive layer, and exposing selected areas of said first photoconductive layer to ultraviolet rays through a shadow mask to discharge the charge from the selected areas of the first photoconductive layer. Then, in developing a uniform density of the screen structure material is obtained.

REFERENCES:
patent: 3956526 (1976-05-01), Ohshima et al.
patent: 5229234 (1993-07-01), Riddle et al.
patent: 5240798 (1993-08-01), Ebemann et al.
patent: 5455133 (1995-10-01), Gorog et al.
patent: 5501928 (1996-03-01), Datta et al.
patent: 5552253 (1996-09-01), Kouacs et al.

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