Lamp driving circuit

Lamp driving circuit according to the present invention, part 1 and a second printed circuit board in the lamp driving circuit of a printed circuit board, wherein the first, the printed circuit board, the switching to switch the input power; A control unit for controlling the switching units; Inverter transformer coupled to said switching unit; Connected to the inverter transformer voltage changing unit that is applied to the control unit by changing the feedback reference current to a reference voltage for the output current control is applied from the inverter transformer; and the mounting, is connected to the first feedback terminal the voltage changing section, the second printed circuit board has a plurality of balance coils are connected to the plurality of lamps to be applied with the same output current for a plurality of lamps; It is to be mounted; the current changing section connected to the second feedback terminal. Inverter transformer, coil balance, balance board, a backlight unit, an IP board