Voltage regulated electronic ballast for multiple discharge lamps
A method and apparatus for regulating the lamp output voltage in a multiple (parallel) discharge lamp fixture irrespective of the number of operating lamps and based upon monitoring of the lamp filament current. A modification thereof provides constant and equal currents in the discharge lamps irrespective of the number of operating lamps.
Philips Electronics North America Corporation
H H H Y H
H05B H05B H05B Y10S H05B
inventional inventional inventional additional inventional
Chin Theo
Chang Stommen