Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Patent
1996-11-14
1999-02-02
Wong, Don
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
315247, 315224, 315209R, 315244, 315DIG4, G05F 100
Patent
active
058669930
ABSTRACT:
An improved ballast circuit controls the power delivered to a three-way dimmable fluorescent lamp for use in European countries and elsewhere where the input voltage is on the order of 220 volts. The ballast circuit comprises passive power factor correction to increase the overall power factor of the circuit to above 95% while also reducing the total harmonic distortion to less than 20%. Adaptations to connect a fluorescent lamp to a three-wire dimming switch are also included.
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Pacific Scientific Company
Philogene Haissa
Wong Don
LandOfFree
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