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

摘要

PROBLEM TO BE SOLVED: To enhance stabilization of dimming when simultaneously lighting a plurality of illumination fixtures and suppress power loss.

SOLUTION: An LED drive circuit 4 comprises: an impedance detection means 7 which detects an impedance value of a phase control type dimmer 2; an impedance adjustment means 6 which adjusts impedance of the LED drive circuit 4 based on an impedance value detected by the impedance detection means 7.

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