LED ILLUMINATION DEVICE

摘要

When an LED lighting apparatus which is a lighter load than an incandescent lamp or halogen lamp is connected to a dimmer, a malfunction may occur. The invention prevents the occurrence of such malfunction without defeating the purpose of low power consumption of the LED lighting apparatus. More specifically, the LED lighting apparatus includes a rectifier circuit, a light-emitting circuit connected to the rectifier circuit and containing a single or a plurality of LEDs in which current begins to flow when an output voltage of the rectifier circuit exceeds a threshold voltage, and a bypass circuit having a bypass path for making the current flow to the rectifier circuit without passing through the light-emitting circuit, and a detecting unit for detecting the current flowing through the light-emitting circuit, and wherein when the current detected by the detecting unit exceeds a predetermined value, the bypass circuit shuts off the current flowing through the bypass path.