Electric lamp and discharge devices: systems – Surge generator or inductance in the supply circuit
Patent
1995-10-02
1997-02-25
Pascal, Robert
Electric lamp and discharge devices: systems
Surge generator or inductance in the supply circuit
315278, H05B 3702
Patent
active
056062273
ABSTRACT:
A semiconductor switching element is connected to the first winding of a transformer. A smoothing capacitor is connected to the second winding of the transformer through a rectifier diode. The charging voltage Va of this smoothing capacitor serves as the applied voltage of a discharge lamp. When the discharge lamp is lighting, the second winding serves as a power source for supplying power to the discharge lamp. A capacitor is connected to the third winding of the transformer through a rectifier diode. The charging voltage of this capacitor serves as the applied voltage of a discharge tube. When the discharge tube discharges, a high-voltage starting pulse is provided to the secondary winding of a high-voltage coil, thereby rendering the discharge lamp ready for lighting. Therefore, when the discharge lamp is starting, the third winding serves as a power source for supplying starting power to the discharge lamp.
REFERENCES:
patent: 4410837 (1983-10-01), Suzuki et al.
patent: 4939430 (1990-07-01), Droho
patent: 5241242 (1993-08-01), Daub
patent: 5426346 (1995-06-01), Allison
Ishikawa Masamichi
Yamamoto Noboru
Yoneima Kenji
Nippondenso Co. Ltd.
Pascal Robert
Shingleton Michael B.
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