A liquid crystal television 100 displays an image on a liquid crystal display by transmitting a light source from a backlight unit 10. The backlight unit 10 drives two cold-cathode tubes 13a, 13b as the backlight 13 at the high frequency voltages each with different polarity generated by a self-excited inverter circuit 11 to generate a light source. The backlight unit 10 connects an inter-lamp coil L2 between two U-shaped cold-cathode tubes 13a, 13b to form a series circuit, and further connects capacitors C5, C6 in parallel with the cold-cathode tubes 13a, 13b.