发明名称 LED driving apparatus
摘要 Provided is an LED driving apparatus capable of improving a power factor through a non-insulation type simplified circuit structure, being adaptable to a triac dimmer, being miniaturized to be economical, and including: a light emitting unit having at least one LED; a rectifier rectifying an alternate current(AC) voltage applied from external power; a power supply unit supplying driving power to the light emitting unit, and having an inductor connected to an output terminal of the light emitting unit; a switch controller receiving a voltage outputted from the rectifier to generate a reference voltage in proportion to the voltage outputted from the rectifier, and comparing the reference voltage with an input voltage generated by detecting a current flowing in the inductor, and controlling an on or off operation of a switch so as to proportion a waveform connecting peaks of the current flowing in the inductor to a waveform represented from the input voltage by turning the switch off at a point of time at which the voltages coincide with each other; and a switch connected to the switch controller to control power inputted from the light emitting unit.
申请公布号 EP2458722(A1) 申请公布日期 2012.05.30
申请号 EP20110181318 申请日期 2011.09.15
申请人 SAMSUNG LED CO., LTD. 发明人 HORINO, MAMORU
分类号 H02M1/42;H05B33/08 主分类号 H02M1/42
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