Fluorescent lamps having improved maintenance and method of maki

Details Fluorescent lamps having improved maintenance and method of maki Fluorescent lamps having improved maintenance and method of maki

1982-02-18

1984-07-10

Moore, David K.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313486, 313485, H01J 6135

Patent

active

044595077

ABSTRACT:
Lumen maintenance of fluorescent lamps is improved by applying over the phosphor of the lamps a vapor deposited film of yttrium oxide having a purity of 99.99%. The vapor is generated by electron beam bombardment of an yttrium oxide target and the film is most efficacious when applied to a thickness of from about 120 to about 600 angstroms.

REFERENCES:
patent: 2386277 (1945-10-01), Smith
patent: 4020385 (1977-04-01), Lagos
patent: 4289991 (1981-09-01), Schreurs
patent: 4396863 (1983-08-01), Ranby et al.

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