Patent ID: 8901854

Claim:
A multi-segment LED driving circuit, used in an AC operating mode for driving a plurality of LEDs to ensure a constant current value of a drive current passing through the LEDs, and the LEDs being divided into a plurality of strings, and having a node between every two adjacent strings, characterized in that: the multi-segment LED driving circuit comprises at least one detection part, at least one comparison part and at least one adjusting part, and the detection part is electrically coupled to the strings, the comparison part is electrically coupled to the detection part and the adjusting part, and the adjusting part is electrically coupled to each string; the detection part detects an input voltage and an output voltage at both ends of each and the next string thereof to form a detected value, and the comparison part is enabled to compare an operating voltage value fed back by the adjusting part with a reference value to output a driving signal and adjust the adjusting part, so as to control the strings that the drive current passes, and then sequentially drive the LEDs to emit light.