Patent ID: 8259052

Claim:
An apparatus for driving a liquid crystal display device, comprising: a liquid crystal panel including a plurality of gate lines and a plurality of data lines arranged perpendicularly to each other; a gate driver that supplies a gate pulse to the gate lines; and a data driver that samples an input N-bit digital data signal to generate an analog data voltage, generates a modulated data voltage according to an M-bit data value of the sampled digital data signal, mixes the modulated data voltage with the analog data voltage to form a mixed data voltage, and supplies the mixed data voltage to the data lines, wherein N and M are positive integers and M is smaller than or equal to N, and wherein the data driver includes, a shift register that generates a sampling signal; a latch that latches the N-bit digital data signal in response to the sampling signal and outputs the latched N-bit digital data signal in response to a data output enable signal (SOE); a digital/analog converter that converts the N-bit digital data signal from the latch into the analog data voltage; a modulator that generates a modulated data voltage according to an M-bit data value of the sampled digital N-bit data signal from the latch; and a mixer that mixes the modulated data voltage with the analog data voltage to form the mixed data voltage and outputs the mixed data voltage to the data lines.