High frequency electronic drive circuits for fluorescent lamps

Details High frequency electronic drive circuits for fluorescent lamps High frequency electronic drive circuits for fluorescent lamps

1998-05-29

2000-09-12

Wong, Don

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

315144, 315DIG2, 315DIG5, H05B 4116

Patent

active

061182273

ABSTRACT:
A high-frequency power supply system for a plurality of fluorescent tubes includes an inverter type power supply connected to the primary side of the high-voltage transformer. The secondary side of the high-voltage transformer includes two high-voltage coils arranged to provide power to four hot cathode fluorescent tubes, wherein each of said high-voltage coils is connected to two of said hot cathode fluorescent tubes connected in parallel. The secondary side of the high-voltage transformer also includes supplemental coils arranged to heat filaments of the hot cathode fluorescent tubes. The power supply also includes at least one capacitor and at least one inductor connected to the secondary side and arranged in a manner that the secondary side provides power to a substantially resistive load.

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patent: 5465010 (1995-11-01), Rimmer
patent: 5530321 (1996-06-01), Sears

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