PROBLEM TO BE SOLVED: To prevent flickering while using an AC power source.MEANS FOR SOLVING THE PROBLEM: A light-emitting diode (LED) drive device comprises: a full rectification circuit 11 which fully rectifies an AC voltage o a three-phase AC power source； a first LED part 91 which is connected in series with an output side of the full rectification circuit 11； a second LED part 92 which is connected in series with the first LED part 91； first electrification control means which is in parallel with the second LED part 92 and connected in series with the first LED part 91 for controlling the amount of electrification to the first LED part 91； and current limit means 41 which is connected in series with the first LED part 91 and the second LED part 92 for controlling the amounts of electrification to the first LED part 91 and the second LED part 92. A first forward voltage Vf1 for turning on the first LED part 91 is set lower than a second forward voltage Vf2 for turning on the first LED part 91 and the second LED part 92, and the first forward voltage Vf1 for turning on the first LED part 91 is set equal to or lower than a minimum pulsating voltage at which a rectification voltage pulsating a voltage value becomes minimum.SELECTED DRAWING: Figure 1
