AC DIRECT CONNECTION TYPE LED LIGHTING DEVICE HAVING FUNCTION OF FLICKER REDUCTION AND IMPROVING LIGHT EFFICIENCY

摘要

PURPOSE: An AC direct-coupled type LED lighting apparatus having a photonic efficiency improvement function and a flicker reduction function is provided to minimize a flicker phenomenon by driving an LED consisting of a plurality of parallel connection groups according to each group. CONSTITUTION: A bridge diode(10) is serially connected between an AC power source and a valley-fill apparatus(20). The valley-fill apparatus is serially connected between the bridge diode and a first LED group. The valley-fill apparatus controls a crest value about a peak current of a zero-crossing part which periodically generates among pulsating current waveforms of 120Hz. The first LED group and a second LED group comprise two or more LED arrays having a plurality of LEDs. A level detector is connected to a parallel connection shift of the first LED group and the second LED group.