Patent ID: 8378588

Claim:
A driving circuit for driving a light source comprising a plurality of light-emitting diodes (LEDs), said driving circuit comprising: a converter coupled to a power source and operable for receiving power from said power source and for providing regulated power to said light source according to a plurality of control signals; and a dimming controller coupled to said converter and operable for monitoring a power switch coupled between said power source and said converter, for receiving a color change signal indicating a first set of operations of said power switch and a dimming request signal indicating a second set of operations of said power switch, for controlling said control signals to change the color of light emitted from said light source in response to said color change signal, and for controlling said control signals to adjust the brightness of said light in response to said dimming request signal, wherein said dimming controller comprises: a trigger monitoring unit operable for receiving a detection signal indicating a conductance status of said power switch, and for identifying said first set of operations and said second set of operations based on said detection signal.