Electric lamp and discharge devices: systems – With cathode or cathode heater supply circuit
Patent
1997-08-15
1999-09-07
Wong, Don
Electric lamp and discharge devices: systems
With cathode or cathode heater supply circuit
315106, 315112, 315595, H05B 3900
Patent
active
059491922
ABSTRACT:
An operating apparatus for a discharge lamp, which includes a pair of electrodes and an arc tube having a material enclosed therein, includes: a selective depositing device for selectively depositing the material on one electrode of the pair of electrodes when the discharge lamp is turned off; and a ballast circuit for starting operation of the discharge lamp and maintaining the operation under rated conditions. The ballast circuit includes a starting pulse generator for applying a starting pulse to the discharge lamp when the discharge lamp starts the operation. The starting pulse generates an electric field acting from the one electrode of the pair of electrodes having the material deposited thereon to the other electrode.
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Byszewski, W.W. et al.: HID Starting: Glow Discharge and Transition to the Thermionic ARC--Journal of the Illuminating Enginerring Society, vol. 20, No. 2, Jan. 1, 1991, pp. 3-9, XP000227292 * p. 3, right-hand column, line 13--p. 3, right hand column, line 29.
Pabst, W. et al.: Igniting High-Pressure Lamps With Electronic Ballasts--Journal of the Illuminating Engineering Society, vol. 21, No. 2, Jan. 1, 1992, pp. 14-20, XP000296444.
Horii Shigeru
Kominami Satoshi
Miyazaki Kouji
Matsushita Electric - Industrial Co., Ltd.
Philogene Haissa
Wong Don
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