Electrodeless fluorescent lamp with cold spot control

Details Electrodeless fluorescent lamp with cold spot control Electrodeless fluorescent lamp with cold spot control

1995-11-16

1998-06-30

Zimmerman, Brian

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313 15, 313550, 315117, H01J 6128

Patent

active

057739269

ABSTRACT:
This invention relates to electrodeless fluorescent RF lamp which includes bulbous lamp envelope (10, 20) with a top, a bottom and a fill of rare gas and vaporizable amalgam (14) therein. A reentrant cavity (11, 21) is disposed adjacent the bottom of the envelope (10 a, 20a) and at least one tubulation (12, 22) extends from the envelope to hold at least a portion of the vaporizable amalgam. An induction coil (2) is disposed on lead wires and coupled with a radio frequency excitation generator for generation of a plasma to produce radiation. At least the major portion of the cold spot where the amalgam resides is maintained at a temperature between about 60.degree. and 140.degree. C. during operation of the lamp, by utilizing a portion of the induction coil to warm up to amalgam.

REFERENCES:
patent: 2975330 (1961-03-01), Bloom et al.
patent: 4262231 (1981-04-01), Anderson et al.
patent: 4622495 (1986-11-01), Smeelen
patent: 4797595 (1989-01-01), De Jong
patent: 4940923 (1990-07-01), Kroontje et al.
patent: 5204584 (1993-04-01), Ikeda et al.
patent: 5274305 (1993-12-01), Bouchard
patent: 5412288 (1995-05-01), Borowiec et al.
patent: 5412289 (1995-05-01), Thomas et al.
patent: 5434482 (1995-07-01), Borowiec et al.

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