Gas probe starter for an electrodeless high intensity discharge

Details Gas probe starter for an electrodeless high intensity discharge Gas probe starter for an electrodeless high intensity discharge

1990-12-04

1992-03-10

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

315344, 313234, H05B 4116

Patent

active

050952498

ABSTRACT:
A gas probe starter for an electrodeless high intensity discharge (HID) lamp includes a fixed starting electrode for coupling a starting voltage to a chamber which is attached to the outer wall of the arc tube and contains a gas. The gas in the starting chamber, which is preferably at a low pressure relative to that of the arc tube fill, is switched between conducting and nonconducting states corresponding to lamp-starting and normal running operation, respectively. To start the lamp, the starting voltage is applied to the starting electrode, causing a discharge current to flow in the gas chamber which, in turn, results in the capacitive coupling of a sufficiently high voltage to the arc tube in order to initiate an arc discharge therein. After the arc discharge is initiated, the starting voltage is substantially reduced so that the discharge current in the starting chamber is extinguished.

REFERENCES:
patent: 4810938 (1989-03-01), Johnson et al.
patent: 4812702 (1989-03-01), Anderson
patent: 4894589 (1990-01-01), Borowiec
patent: 4894590 (1990-01-01), Witting
patent: 4902937 (1990-02-01), Witting
patent: 4959584 (1990-09-01), Anderson
Ingold, John H.; "Glow Discharges at Low Frequences"; Gaseous Electronics, vol. I, edited by M. N. Hirsh and H. J. Oskam, Academic Press, N.Y.; 1978, pp. 19-20.

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