Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Periodic switch in the primary circuit of the supply...
Patent
1993-04-30
1995-06-13
Pascal, Robert J.
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Periodic switch in the primary circuit of the supply...
315244, 315239, H01P 700
Patent
active
054246156
ABSTRACT:
An electronic ballast circuit for discharge lamps, comprising a boosting transformer for applying a high voltage as a discharging voltage to the discharging lamps, the high voltage being induced in a main secondary winding of the transformer according to forward and reverse currents flowing through a primary winding of the transformer, a charging section for charging a voltage from an input power source terminal, first and second switching sections for repeatedly performing switching operations contrary to each other, a resonance section for allowing the forward current to flow through the primary winding of the boosting transformer when the first switching section conducts and allowing the reverse current to flow through the primary winding of the boosting transformer when the second switching section conducts, and a plurality of condensers, each connected between the secondary winding of the boosting transformer and a filament of a corresponding one of the discharge lamps, the condensers limiting amounts of discharging currents to the discharge lamps.
REFERENCES:
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patent: 4392087 (1983-07-01), Zansky
patent: 4463286 (1984-07-01), Justice
patent: 4503361 (1985-03-01), Hanlet
patent: 5010278 (1991-04-01), Kang
patent: 5148087 (1992-09-01), Moisin et al.
patent: 5191263 (1993-03-01), Konopka
patent: 5220247 (1993-06-01), Moisin
Gambino Darius
Goldstar Instrument & Electric Co., Ltd.
Pascal Robert J.
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