Patent ID: 7224589

Claim:
An inverter circuit for producing power factor correction effect including a power source, a rectification and filter circuit including a rectifier and a filter capacitor, and an inverter driver circuit interconnected the rectification and filter circuit and a load wherein a DC is generated by the rectification and filter circuit and is delivered to the inverter driver circuit, the inverter driver circuit comprising: a first controller for receiving input light adjustment signals and outputting light adjustment cycle signals; a second controller for receiving the light adjustment cycle signals and outputting electrical conduction cycle signals wherein the second controller is selected from being electrically connected to a power source and electrically connected to the rectification and filter circuit for obtaining a wave current, and an electrical conduction of the electrical conduction cycle signals depends on an input on/off of the wave current at the second controller; a driver for receiving the electrical conduction cycle signals and outputting varying voltage pulse signals in response to the input on/off of the DC wherein the varying voltage pulse signals are generated in response to the electrical conduction cycle signals being enabled or not by the input on/off of the DC; and a transformer for receiving the varying voltage pulse signals and outputting a converted voltage to the load for activation wherein the converted voltage is a varying voltage depending on the varying voltage pulse signals.