Patent ID: 8400082
Filing Date: 2013-03-19
Classification: H05B

Abstract:
1. A power-saving LED lighting apparatus, comprising: a rectifier circuit part which full-wave rectifies commercial power and outputs a rectified voltage; an LED part in which a plurality of LED arrays having a plurality of LEDs are connected in series and the rectified voltage of the rectifier circuit part is supplied to an anode of the uppermost LED array; a driving part which is provided with a plurality of switching devices for supplying or blocking a driving current to the plurality of LED arrays, wherein one terminal of each switching device among the plurality of switching devices is connected to each corresponding anode of the plurality of LED arrays, and the other terminal thereof is connected to a cathode of the lowermost LED array together; and a control part which outputs a control signal for turning on and off the switching devices of the driving part according to a level of the rectified voltage of the rectifier circuit part, wherein the driving part further comprises a level shift circuit which shifts the control signal output from the control part to control the plurality of the switching devices.