Discharge lamp using acoustic resonant oscillations to ensure hi

Details Discharge lamp using acoustic resonant oscillations to ensure hi Discharge lamp using acoustic resonant oscillations to ensure hi

1989-05-15

1991-01-08

Pascal, Robert J.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

313641, H05B 4116

Patent

active

049838890

ABSTRACT:
In an electroded metal halide high intensity discharge lamp, the arc is ignited and acoustic resonant oscillations are excited in the fill by a high frequency electrical power supply in order to thoroughly mix the ingredients comprising the fill. Either an amplitude modulated or a non-amplitude-modulated power supply can be used to drive the arc. The result is highly efficient straight arc operation of the lamp even in the horizontal burning position.

REFERENCES:
patent: 4170746 (1979-10-01), Davenport
patent: 4605881 (1986-08-01), Dakin
patent: 4724361 (1988-02-01), Wada et al.
patent: 4783615 (1988-11-01), Dakin
patent: 4810938 (1989-03-01), Johnson et al.
Johnson, P. D., "Control of Radial Distributions in High Intensity Discharge Lamps", U.S. patent application Ser. No. 454,255, filed 12/29/82.
Dobrusskin, A., "Review of Metal Halide Lamps", 4th International Symposium on the Science and Technology of Light Sources, Spr. 7-10, 1986, pp. 3-19.

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