LED DRIVE CIRCUIT, LED LIGHTING FIXTURE, LED LIGHTING APPARATUS, AND LED LIGHTING SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide an LED drive circuit capable of reducing a flicker or a blink of an LED which may be caused when the LED is used together with a phase controlling dimmer.;SOLUTION: An LED drive circuit (LED drive circuit 4) for receiving an alternating voltage to drive an LED (LED module 3) comprises: a current extraction unit (bypass circuit 7) for extracting current from a current supply line through which an LED drive current is supplied to the LED; and a timing adjusting section (timing adjusting circuit 6) for adjusting current extraction start timing and current extraction duration in the current extraction unit.;COPYRIGHT: (C)2012,JPO&INPIT