Annular light source unit using electrodeless discharge and a me

Details Annular light source unit using electrodeless discharge and a me Annular light source unit using electrodeless discharge and a me

1988-04-18

1989-09-12

Yusko, Donald J.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

315 39, 31511121, 31323121, 31323161, H05B 4116, H01J 746

Patent

active

048663514

ABSTRACT:
Disclosed are an annular light source unit using electrodeless discharge and a method of lighting the same. The unit comprises an annular electrodeless discharge tube, a bowl-shaped microwave cavity device, and a plurality of microwave oscillators. The cavity unit is disposed in such a manner as to cover substantially the whole outer surface of the discharge tube excluding an underside thereof. The unit has slit antennas at a plurality of portions thereof prepared by dividing into substantially equal parts a whole circumferential portion thereof facing a whole circumferential surface of the discharge tube. The method comprises the step of individually sequentially starting the operations of the microwave oscillators after the stabilization of the discharge at a portion of the discharge tube in the vicinity of the corresponding slit antenna due to supply, therefrom, of microwave powers transmitted from the immediately preceding microwave oscillator.

REFERENCES:
patent: 4070603 (1978-01-01), Regan et al.
patent: 4498029 (1985-02-01), Yoshizawa et al.
patent: 4633140 (1986-12-01), Lynch et al.
patent: 4673846 (1987-06-01), Yoshizawa et al.
patent: 4712046 (1967-12-01), Butler et al.
patent: 4749915 (1988-06-01), Lynch et al.

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