Luminescent screen

Details Luminescent screen Luminescent screen

1995-11-22

1997-11-04

Patel, Nimeshkumar

Electric lamp and discharge devices

Cathode ray tube

Screen

313467, 313495, 313486, H01J 2920

Patent

active

056843585

ABSTRACT:
The invention relates to a display screen comprising a phosphor composition of a sulphide and/or selenide-containing phosphor which is provided with a coating which is composed of germanium disulphide and/or germanium diselenide. In such a display screen, in particular a low-energy cathode ray display screen, the advantages of the efficient sulphide or selenide-containing phosphors can be used and said display screen remains bright and rich in contrast for a long period of time because the coating, which is composed of germanium disulphide and/or germanium diselenide, surprisingly acts as a stabilizing protective coating which limits the corrosion processes in sulphide and/or selenide-containing phosphors induced by low-energy radiation.

REFERENCES:
patent: 3461077 (1969-08-01), Kobayashi et al.
patent: 3690929 (1972-09-01), Yokota et al.

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