Patent ID: 8089450

Claim:
A liquid crystal display device comprising: a liquid crystal panel; a light source device having a discharge tube; and a light source driving circuit driving the discharge tube which performs a blinking operation in synchronism with a frame period, and an ON period of the blinking period being shorter than the frame period, wherein the light source driving circuit includes a primary side circuit outputting a primary voltage, a frequency of the primary voltage being higher than a frequency of the blinking operation, and lower than a frequency of a lump current and a lamp voltage of the discharge tube, a transformer circuit boosting the primary voltage to an alternating voltage, and a secondary circuit receiving the alternating voltage and applying the lamp voltage to the discharge tube, wherein voltage applied to the discharge tube during a burst-off period are greater than voltage applied during a burst-on period, and wherein current applied to the discharge tube during the burst-off period are greater than zero, and smaller than current applied during a burst-on period.