Electrodeless discharge lamp having a concave recess and foil el

Details Electrodeless discharge lamp having a concave recess and foil el Electrodeless discharge lamp having a concave recess and foil el

1994-02-01

1994-11-22

Pascal, Robert J.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

315 39, 315344, H05B 4116

Patent

active

053672267

ABSTRACT:
An electrodeless discharge lamp includes a single type auxiliary electrode for preliminary discharging, disposed on or adjacent to outer peripheral wall of lamp tube at a position for being electrostatically coupled to interior space of the tube, and supplied with a power from a second high frequency power source other than a first high frequency power source supplying a high frequency power to a main induction coil on the tube, whereby the lamp is made to attain an excellent startability without requiring any large size high frequency power source.

REFERENCES:
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patent: 4894590 (1990-01-01), Witting
patent: 4902937 (1990-02-01), Witting
patent: 4982140 (1991-01-01), Witting
patent: 5032757 (1991-07-01), Witting
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patent: 5084654 (1992-01-01), El-Hamamsy et al.
patent: 5095249 (1992-03-01), Roberts et al.
patent: 5140227 (1992-08-01), Dakin et al.
patent: 5157306 (1992-10-01), Witting
patent: 5306987 (1994-04-01), Dakin et al.

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