Patent ID: 8378589

Claim:
A dimming controller for controlling dimming of a light-emitting diode (LED) light source, said dimming controller comprising: a monitoring terminal configured to receive a switch monitoring signal indicative of an operation of a power switch, wherein said operation of said power switch is selected from a group comprising a turn-on operation and a turn-off operation, wherein said power switch transfers power from an AC power source to a bridge rectifier when said power switch is on, wherein a power converter receives input power from said bridge rectifier and provides output power to said LED light source, and wherein an average current flowing through said LED light source has a first value if said power switch performs a first turn-on operation; and a control terminal configured to generate a control signal to adjust said average current from said first value to a second value if said switch monitoring signal indicates that said power switch performs a set of operations comprising a second turn-on operation following a turn-off operation so as to control dimming of said LED light source.