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AC DIRECT CONNECTION TYPE LED LIGHTING DEVICE HAVING FUNCTION OF FLICKER REDUCTION AND IMPROVING LIGHT EFFICIENCY
AC DIRECT CONNECTION TYPE LED LIGHTING DEVICE HAVING FUNCTION OF FLICKER REDUCTION AND IMPROVING LIGHT EFFICIENCY
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机译:具有减少闪烁的功能和提高光效率的交流直接连接型LED照明装置
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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.
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