Patent ID: 7852018

Claim:
A lamp driving apparatus of a liquid crystal display device, comprising: a plurality of lamps; a polarity signal generator generating a polarity signal; an inverter generating a first drive signal; an inverter controller driving the inverter and generating a first dimming signal, the polarity of the first dimming signal being determined by the polarity signal; a first level shifter generating a second dimming signal by shifting a voltage level of the first dimming signal; a dead time tuning part generating a second drive signal by delaying a dead time of the first drive signal; a plurality of logical sum gate parts, each of the plurality of logical sum gate parts generating a third drive signal by performing a logical sum of the second dimming signal and the second drive signal; a level shifter part generating a fourth drive signal by shifting a voltage level of the third drive signal; a plurality of switch device parts, each of the plurality of switch device parts receiving a high potential supply voltage and a low potential supply voltage and selectively outputting one of the high potential supply voltage and the low potential supply voltage in response to the fourth drive signal; and a plurality of transformers, each of the plurality of transformers transforming the selectively outputted voltage of the switch device parts and supplying the transformed voltage to the lamps.