Electric lamp and discharge devices – Cathode ray tube – Screen
Patent
1995-12-01
1998-04-14
O'Shea, Sandra L.
Electric lamp and discharge devices
Cathode ray tube
Screen
2523016P, 2523014P, 25230116, 2523014R, 313461, H01J 2910, C09K 1108
Patent
active
057396329
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 comprises one or more catena-polyphosphates of one or more alkaline earth metals, zinc, cadmium and/or manganese. 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 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: 3602753 (1971-08-01), Evans
patent: 4340839 (1982-07-01), Fujita et al.
patent: 4377769 (1983-03-01), Beatty et al.
patent: 4539506 (1985-09-01), Ohtani et al.
"Photochemistry of semiconductor particles. I. Optical properties of ZnS sols", by Ling Zang et al., J. Photochem, Photoboil A 1994, pp. 189-195.
"Absorption and Fluorescence Behavior of Redispersible CdS Colloids in Various Organic Solvents", by U. Resch et al, Langmuir 1992, pp. 2215-2218 .
Bechtel Helmut
Czarnojan Wolfram
Haase Markus
Lauter Joseph
Mayr Walter
Fox John C.
O'Shea Sandra L.
U.S. Philips Corporation
Williams Joseph
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