Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Impedance or current regulator in the supply circuit
Patent
1991-09-09
1993-08-03
Pascal, Robert J.
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Impedance or current regulator in the supply circuit
315290, 315244, 315DIG2, 315DIG7, 315DIG4, 315307, 315DIG5, 315246, H05B 3100, H05B 4114, H05B 4124
Patent
active
052332730
ABSTRACT:
When a discharge lamp is started, high voltage pulses which superpose the voltage due to LC resonance of a resonance circuit are supplied to the discharge lamp, and breakdown occurs in the discharge lamp. The pulse energy needed for the high voltage pulses is small and the output power of the resonance circuit can be decreased. After the breakdown, the energy needed for the transfer from glow discharge to arc discharge is supplied by the resonance, and the high voltage pulses used to supply the starting energy are allowed to be stopped. Thus, the starting and restriking of a discharge lamp is sure, and the starting circuit for a discharge lamp can be made more compact.
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"Restriking Hot Metal Vapor Lamps-Lamp Characteristic and Circuit Requirements", Elms et al., Journal of IES, Oct. 1975, pp. 26-30.
Horii Shigeru
Kamitani Takayuki
Miyazaki Koji
Ozawa Masataka
Waki Atsuo
Matsushita Electric - Industrial Co., Ltd.
Pascal Robert J.
Shingleton Michael B.
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