Patent ID: 7332871
Filing Date: 2008-02-19
Classification: H05B,Y02B

Abstract:
1. A high frequency power source control circuit, comprising: an active power factor corrector, which has input terminals for receiving an AC power and has functions of power factor correcting and voltage boosting; a PWM (Pulse Width Modulation) and high frequency power output circuit, which is coupled to the active power factor corrector and is a PWM integrated circuit as a main circuit; a DC power supply circuit coupled to the active power factor corrector; a DC load system, wherein the DC power supply circuit supplies a DC power to the load system; and a starting circuit, wherein the DC load system feeds a signal back to the starting circuit, and when the load system receives the DC power, the load system generates a voltage and outputs the voltage to the PWM and high frequency power output circuit in order to start CCFL tubes or EEFL tubes and offer each of the CCFL tubes or EEFL tubes a stable high frequency voltage or a stable high frequency current, such that each of the CCFL tubes or EEFL tubes gets an appropriate compensation current.