Patent ID: 8610360

Claim:
A light-emitting diode (LED) device for preventing soft-start flicker, the LED device comprising: an LED module; a voltage converter coupled to the LED module, for converting a first voltage into a second voltage to output the second voltage to the LED module; a variable current load coupled to the LED module, for sinking a load current from the LED module; and a loop control unit coupled to the LED module, the voltage converter and the variable current load, the loop control unit comprising: a soft-start unit for activating a soft-start mechanism of the voltage converter when power of the LED device is turned on; and a dimming control unit for controlling the variable current load to progressively increase the load current to a target value and to maintain the load current on the target value until the soft-start mechanism is completed; wherein the load current does not return to zero before the soft-start mechanism is completed, and the second voltage is fixed.