Patent ID: 9167640
Filing Date: 2015-10-20
Classification: H05B

Abstract:
1. An AC-direct-type LED lighting device, comprising: a compensation circuit including a compensation inductor and a first compensation capacitor parallelly connected to one terminal of an AC input and a second compensation capacitor connected in series to the parallelly-connected compensation inductor and first compensation capacitor, and configured to compensate the AC input; a rectifying unit configured to rectify an output from terminals of the second compensation capacitor to obtain a direct current; and an LED array configured to be driven by an output of the rectifying unit, wherein capacities of the first compensation capacitor, the second compensation capacitor and the compensation inductor, and an output voltage of the LED array are determined to cause 0.9 or larger cosine value of a phase, with respect to a voltage of the AC input, of a resulting current, obtained by dividing the voltage of the AC input by a sum of (i) a parallel value of an equivalent impedance R