Electric lamp and discharge devices: systems – With cathode or cathode heater supply circuit
Patent
1989-05-18
1991-10-08
Pascal, Robert J.
Electric lamp and discharge devices: systems
With cathode or cathode heater supply circuit
315106, 315197, 315300, 315164, H05B 4100
Patent
active
050557424
ABSTRACT:
A dimming system, which provides a time-varying current from a power source between the electrodes of a gas discharge lamp, simultaneously provides high-frequency, low-level current between the electrodes to sustain an electric discharge in the lamp when the time varying current alone is insufficient. The system provides reduced starting stress in the lamp and, therefore, longer lamp life by delaying the formation of an arc discharge, during start-up, until the electrodes have been heated. The system can be used with standard magnetic ballasts to provide full-range dimming of gas discharge lamps from 3 to 100 percent light output with minimal striations, lamp drop out, and flicker.
REFERENCES:
patent: 3619716 (1971-11-01), Spira et al.
patent: 3731142 (1973-05-01), Spira et al.
patent: 4350935 (1982-09-01), Spira et al.
patent: 4651060 (1987-03-01), Clark
patent: 4663569 (1987-05-01), Alley et al.
patent: 4663570 (1987-05-01), Luchaco et al.
May & Christe GMBH Transformatarenwerke brochure.
Welding Power Handbook, Union Carbide.
Cherry/Gas Plasma Displays brochure.
Luciano DiFraia, "A Method to Achieve Continuous Dimming of Low Pressure Sodium and Other Gas Discharge Lamps" Journal of IES (Jul. 1981), pp. 245-252.
Capewell Dennis M.
Hausman Donald F.
Jurell Scott R.
Luchaco David G.
Motto Eric R.
Lutron Electronics Co. Inc.
Pascal Robert J.
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