LED LIGHTING CIRCUIT, LED ILLUMINATING DEVICE, AND SOCKET FOR LED ILLUMINATING UNIT

摘要

The purpose of the present invention is to provide an LED lighting circuit, which can normally light an LED even if an alternating current power supply is an electronic transformer, an LED illuminating device, and a socket for an LED illuminating unit. Disclosed is an LED lighting circuit that has: a rectifying circuit, which has alternating current output inputted thereto from an alternating current power supply; an LED drive unit, which drives the LED by having rectifying output inputted thereto from the rectifying circuit; a reverse current preventing unit, which is provided between the rectifying circuit and the LED drive unit; and a terminal voltage control unit, which reduces the output terminal voltage of the rectifying circuit in the case where the alternating current output from the alternating current power supply is unstable or stopped. Also provided are an LED illuminating device, and a socket for an LED illuminating unit.