Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Impedance or current regulator in the supply circuit
Patent
1995-12-07
1998-05-05
Pascal, Robert
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Impedance or current regulator in the supply circuit
315209R, 315307, 315DIG5, H05B 3702
Patent
active
057479410
ABSTRACT:
An electronic ballast includes an inverter producing pulses having a DC component, an output circuit connecting the filaments of one or more lamps in series, and a control circuit for detecting direct current through the filaments. The control circuit includes a capacitor charged by the DC component. When the voltage on the capacitor reaches a predetermined value, the ballast applies a high voltage to the lamps. The predetermined value is not reached unless a direct current passes from the output of the inverter through all lamp filaments to the capacitor. If a lamp filament is not intact, the inverter will not apply high voltage to the lamp.
REFERENCES:
patent: 3710177 (1973-01-01), Ward
patent: 4008414 (1977-02-01), Agnew
patent: 4370600 (1983-01-01), Zansky
patent: 4382212 (1983-05-01), Bay
patent: 4562383 (1985-12-01), Kerscher et al.
patent: 5170099 (1992-12-01), Ueoka et al.
patent: 5214355 (1993-05-01), Nilssen
patent: 5396155 (1995-03-01), Bezdon et al.
patent: 5436529 (1995-07-01), Bobel
patent: 5444336 (1995-08-01), Ozawa et al.
Bezdon Ronald J.
Crouse Kent E.
Russell Randy G.
Shackle Peter W.
Energy Savings, Inc.
Pascal Robert
Vu David H.
Wille Paul F.
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