The present invention is a light emitting diode applies to the particular converter that relates to the active valley fill circuit for driving the AC power source directly connected type linear manner of the LED driving apparatus is not used to improve flicker characteristics, and high optical efficiency, high power factor and low THD characteristics an apparatus for enabling. In conventional direct-type AC power supply the LED driving method of the flicker without a reduction in the power factor because it is very difficult to improve the way the flicker characteristic with a converter case of the relevant one trillion people have been widely used. However, if the lighting using a converter with high production costs using a lot of parts, the system is reliable, relatively large and heavy, with a low downside.
In the present invention aims to provide means to improve flicker characteristics were noted in the AC power supply direct connection type linear light emitting diode Raise the advantages of the drive system problem. And through the active valley fill circuit for the LED driving of the present invention add only one capacitor and one switch of the entire lighting while achieving a flicker improved and high optical efficiency, high power factor and low THD characteristics of the AC power supply direct connection type linear way lower manufacturing costs can be reduced to keep the size and weight, and reliability can also be improved.