| 摘要 |
An operational amplifier, and an apparatus and a method for driving an LCD device using the same are provided to reduce power consumption by minimizing a static current during a non-driving period. An apparatus for driving an LCD(Liquid Crystal Display) device includes an operational amplifier for supplying a gradation voltage to a panel. The operational amplifier includes amplifying and outputting stages(92,94), and first and second bias switching units(82,84). The amplifying and outputting stages receive first and second bias voltages(HVDD,HVSS), and differential input signals(INP,INN), and amplify and buffer the received voltages and signals. The first and second bias switching units apply first and second bias voltages to the amplifying and outputting stages according to first and second control signals(ENB,EN), respectively, so as to remove a bias current.
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