Patent ID: 6492780
Filing Date: 2002-12-10
Classification: H05B

Abstract:
A lamp ballast system adapted to be connected to a lamp load, comprising:a rectifying and filtering unit adapted to rectify and filter an alternating current input so as to generate a direct current output; a voltage multiplying unit connected to said rectifying and filtering unit so as to receive the direct current output therefrom, said voltage multiplying unit being operable so as to generate a voltage-multiplied direct current output; a frequency inverter unit including a driver circuit connected to said voltage multiplying unit so as to receive the voltage-multiplied direct current output therefrom, an oscillator circuit connected to and driven by said driver circuit so as to generate a high-frequency oscillating current output, and a converter circuit connected to said oscillator circuit so as to receive the high-frequency oscillating current output, and operable so as to convert the oscillating current output into a stable high voltage, high frequency alternating current output; and a phase correction unit adapted to interconnect said converter circuit and the lamp load, and including at least one set of a transformer and a capacitor that are connected in series.