| 摘要 |
The present invention relates to an LED lighting device, and more particularly to an alternating current power direct driving-type LED lighting device which can drive LEDs using constant voltage and constant current of commercial alternating current power direct driving. An alternating current power direct driving-type LED lighting device according to an embodiment of the present invention comprises: an LED unit which includes a plurality of LEDs; and an LED drive unit which supplies power to the LED unit. The LED drive unit comprises: an input unit which receives commercial alternating current power from the outside and outputs the commercial alternating current power; a rectification unit which receives the commercial alternating current power from the input unit and rectifies the commercial alternating current power; a smoothing unit which receives the rectified power from the rectification unit and smoothes the rectified power; a constant current control unit which receives smoothed power smoothed through the smoothing unit, and controls current, supplied to the LED unit, to be uniformly maintained; a constant voltage control unit which receives the smoothed power and controls a voltage so that a constant voltage is maintained in the LED unit; and a dimming unit which controls driving current, passing through the LED unit, to vary according to a preset range. |
