Patent ID: 8653752

Claim:
A light-emitting diode driving apparatus comprising: a rectifying circuit that can be connected to AC power supply and rectifies an AC voltage of the AC power supply to provide a rectified voltage; a first LED section that includes at least one LED device connected to said rectifying circuit; a second LED section that includes at least one LED device serially connected to said first LED section; a first portion that is connected in parallel to said second LED section, and controls the flowing current amount in said first LED section; a fourth portion that is serially connected to said first portion, and controls the flowing current amount in said first and second LED sections; a first current control portion that controls said first portion; a fourth current control portion that controls said fourth portion; a current detection portion that detects a current detection signal based on the amount of a current flowing in an output line serially connected from said first LED section to said second LED section; and a harmonic suppression signal providing portion that provides a harmonic suppression signal voltage based on the rectified voltage provided from said rectifying circuit, wherein said first and fourth current control portions compare the current detection signal detected by said current detection portion with the harmonic suppression signal voltage provided by said harmonic suppression signal providing portion, and control said first and fourth portions based on the comparison result whereby suppressing harmonic components.