Patent ID: 8222824

Claim:
A light emitting diode driving apparatus, comprising: a switching converter having an inductor and a switching device; a plurality of serial light emitting diode lines each having a plurality of light emitting diodes connected in series; a plurality of rectifier diodes respectively connected in series to the plurality of serial light emitting diode lines; a plurality of capacitors respectively connected to nodes between the serial light emitting diode lines and the rectifier diodes for smoothing a voltage; at least three current distribution coils in which one end of the first winding of a first current distribution coil, one end of the first winding of a second current distribution coil, and one end of the first winding of a third current distribution coil are connected to the switching converter, an other end of the first winding of the first current distribution coil is connected to one end of the second winding of the second current distribution coil, an other end of the first winding of the second current distribution coil is connected to one end of the second winding of the third current distribution coil, and an other end of the first winding of the third current distribution coil is connected to one end of the second winding of the first current distribution coil; wherein the plurality of serial light emitting diode lines comprise: a first serial light emitting diode line connected to an other end of the second winding of the first current distribution coil via a first rectifier diode; a second serial light emitting diode line connected to an other end of the second winding of the second current distribution coil via a second rectifier diode; and a third serial light emitting diode line connected to an other end of the second winding of the third current distribution coil via a third rectifier diode.