LED DRIVE CIRCUIT, PHASE CONTROL TYPE DIMMER, LED LIGHTING LAMP, LED LIGHTING EQUIPMENT, AND LED LIGHTING SYSTEM

摘要

PPROBLEM TO BE SOLVED: To provide an LED drive circuit capable of reducing flickering at the time of low dimming of the LED. PSOLUTION: The LED drive circuit can be connected to a phase control type dimmer 2 and drives an LED (LED module 3) by inputting alternating voltage. The LED drive circuit includes a current extracting part 6 which continues flowing current to the phase control type dimmer 2 so that a triac Tri1 inside the phase control type dimmer 2 may not be switched off before the alternating current voltage drops to 0 V after the triac Tri1 inside the phase control type dimmer 2 is switched on and the LED is lighted. PCOPYRIGHT: (C)2011,JPO&INPIT