Patent ID: 8659534

Claim:
A backlight driving apparatus comprising: a plurality of light emitting diode arrays including a plurality of light emitting diodes connected in series; a power source for generating a driving current; a current generator for generating currents to drive the light emitting diode arrays using the driving current, respectively, wherein the current generator comprises a plurality of first choke coils connected between the power source and the light emitting diode arrays and compensates for an impedance difference between the light emitting diode arrays; a base current generator for generating a plurality of base currents using a current from any one of the light emitting diode arrays; and a current mirror circuit for allowing the same amount of currents to flow respectively through the light emitting diode arrays based respectively on the base currents, wherein the base current generator comprises a plurality of second choke coils connected between any one of the light emitting diode arrays and the current mirror circuit, wherein a plurality of second choke coils: generate the plurality of base currents based on a first current flowing through the any one the light emitting diode arrays, respectively supply the plurality of base currents to a plurality of base terminals as control terminals of transistors of the current mirror circuit, have a plurality of first terminals which are commonly connected with the any one of the light emitting diode arrays, and have a plurality of second terminals which are respectively connected with the plurality of base terminals of transistors of the current mirror circuit.