Low-pressure mercury vapor discharge lamp

Details Low-pressure mercury vapor discharge lamp Low-pressure mercury vapor discharge lamp

1990-03-30

1991-08-20

DeMeo, Palmer C.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313489, H01J 162

Patent

active

050417584

ABSTRACT:
Low-pressure mercury vapor discharge lamp in which the envelope (1) is provided on its inside with a luminescent layer (5), which comprises green luminescing Zn.sub.2 SiO.sub.4 :Mn.sup.2+ (willemite), while between the luminescent layer (5) and the envelope (1) a luminescent intermediate layer (6) is present, which comprises luminescent Sr.sub.4 Al.sub.14 O.sub.24 : Eu.sup.2+, in which the Sr may be replaced for up to 25 mol. % by Ca.

REFERENCES:
patent: 4208448 (1980-06-01), Panaccione
patent: 4524300 (1985-06-01), Rutten et al.
patent: 4705986 (1987-11-01), Iwama et al.
"Fluorescent Lamp Phosphers: Technology and Theory", by Keith H. Butler, The Pennsylvania State University Press, pp. 6-8, 12/1980.

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