Patent ID: 6414447
Filing Date: 2002-07-02
Classification: H05B

Abstract:
A discharge lighting device comprising:a load circuit provided with a discharge lamp, an inductance and a capacitance and having a natural resonance frequency, and a combination-type high frequency inverter which is provided with: a full-wave rectifier for rectifying a low frequency AC voltage without smoothing the voltage; at least a pair of switching means which have a function of an anti-parallel diode and are configured to be alternately switched, an inductor, a smoothing condenser, and a resonance condenser, said combination-type frequency inverter configured to operate with the duration of the â€˜onâ€™ state of one of the switching means variable and the â€˜onâ€™ duration of the other switching means fixed at a length of time where the range is 1 to 1.5 times the natural resonance cycle of the load circuit, and the combination-type high frequency inverter having a function of an active filter and serving to energize the load circuit with a high frequency output.