Patent ID: 8872430

Claim:
A light emitting diode (LED) drive circuit, comprising: a square wave generator configured to generate a square-wave signal for driving an LED unit; an LLC resonance circuit configured to transform the square-wave signal outputted by the square wave generator into a sinuous wave of a reduced voltage level; the LED unit comprising a plurality of LED sub-units; each of the LED sub-units comprising at least a first LED lamp set and a second LED lamp set connected in parallel; and LEDs of the first LED lamp set being disposed in a direction opposite to those of the second LED lamp set; the square wave generator, the LLC resonance circuit and the LED unit are connected in sequence; wherein the LED sub-units are divided into a plurality of LED sub-unit sets; and the LLC resonance circuit comprises a primary winding and secondary windings; the primary winding comprises an inductor; the secondary windings comprise a plurality of induction inductors; and the induction inductors are connected with the LED sub-unit sets in one-to-one correspondence.