High intensity electrodeless low pressure light source driven by

Details High intensity electrodeless low pressure light source driven by High intensity electrodeless low pressure light source driven by

1996-03-27

1998-11-10

Lee, Benny T.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

315267, 315344, H01J 6504

Patent

active

058349057

ABSTRACT:
An electric lamp assembly includes an electrodeless lamp having a closed-loop, tubular envelope enclosing mercury vapor and a buffer gas at a pressure less than about 0.5 torr, a transformer core disposed around the lamp envelope, an input winding disposed on the transformer core and a radio frequency power source coupled to the input winding. The radio frequency source supplies sufficient radio frequency energy to the mercury vapor and the buffer gas to produce in the lamp envelope a discharge having a discharge current equal to or greater than about 2 amperes. The electrodeless lamp preferably includes a phosphor on an inside surface of the lamp envelope for emitting radiation in a predetermined wavelength range in response to ultraviolet radiation emitted by the discharge.

REFERENCES:
patent: 3500118 (1970-03-01), Anderson
patent: 3987334 (1976-10-01), Anderson
patent: 4017764 (1977-04-01), Anderson
patent: 4180763 (1979-12-01), Anderson
patent: 4253047 (1981-02-01), Walker et al.
patent: 4864194 (1989-09-01), Kobayashi et al.
patent: 5146140 (1992-09-01), Piejak et al.
J. Schlejen, Inductively Coupled Fluorescent Lamps: `The QL Lighting System`, (no date).
Netten, A., Verheij, C. M. (1991), The Operating Principles of the Philips QL Lamp System, pp. 1-15.
Anderson, John M., Electrodeless Fluorescent Lamps Excited by Solenoidal Electric Fields, Illuminating Engineering (Apr. 1969), pp. 236-244.

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