Patent ID: 8710766
Filing Date: 2014-04-29
Classification: H05B,Y02B

Abstract:
1. An LED driving circuit connectable to a phase-control type dimmer, for inputting an alternating voltage to drive an LED, the LED driving circuit comprising: impedance detecting means for detecting an impedance value of the phase-control type dimmer; impedance adjusting means for adjusting an impedance of the LED driving circuit based on the impedance value detected by the impedance detecting means; and a current detecting means for detecting a current value of a current flowing through the impedance adjusting means; wherein the impedance detecting means outputs an adjustment signal for adjusting the impedance to the impedance adjusting means, the adjustment signal comprises a signal indicating the impedance value detected by the impedance detecting means; and the impedance adjusting means determines an adjusted impedance value based on the adjustment signal and the detected current value, detected by the current detecting means of the current flowing through the impedance adjusting means.