Low-pressure mercury vapor discharge light source of high wall l

Details Low-pressure mercury vapor discharge light source of high wall l Low-pressure mercury vapor discharge light source of high wall l

1991-12-24

1992-12-08

Yusko, Donald J.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313487, 313490, 2523014P, 2523016P, H01J 163, C09K 1171

Patent

active

051700956

ABSTRACT:
A low-pressure mercury vapor fluorescent lamp has a luminescent coating including a small quantity of a fine grain inactive material such as a calcium, strontium or barium chloroapatite, which inactive material has a surplus of a metallic cation giving the coating a net positive charge to deter absorption of mercury ions and prolong the life of the lamp.

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patent: 4420709 (1983-12-01), Rattray
patent: 4890033 (1989-12-01), Ichinomiya et al.
patent: 4891550 (1990-01-01), Northrop et al.

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