Patent ID: 7719205
Filing Date: 2010-05-18
Classification: H05B

Abstract:
1. An inverter for driving light source, comprising: a pulse control unit for producing a conduction period signal, a power switch unit driven by the conduction period signal and a power conversion unit for outputting a driving power, wherein after the inverter obtains an input power, the input power is transmitted to the power conversion unit through the conduction period of the power switch unit, and the inverter is characterized in that: a waveform modulation unit is further connected between the power switch unit and the power conversion unit, and the waveform modulation unit obtains the input power from the power switch unit and converts thereof into a modulation power, wherein the modulation power includes a positive edge modulation period with gradually rising voltage peak and a negative edge modulation period with gradually falling voltage peak, with the positive edge modulation period has a duration longer than that of the negative edge modulation period, and the modulation power is transmitted to the power conversion unit for being further converted into the driving power.