Data driver and liquid crystal display device using the same

A liquid crystal display device, comprising:

• a liquid crystal display panel displaying data by a gradation voltage provided in response to a gate driving signal;
• a data driving unit generating the gradation voltage based on a gamma voltage and providing the same to the liquid crystal display panel in response to a data control signal, the data driving unit comprising a plurality of data driving integrated circuits;
• a gate driving unit providing the gate driving signal to the liquid crystal display panel in response to a gate control signal;
• and
• a timing controller providing the data control signal and the gate control signal, wherein each of the plurality of data driving integrated circuits comprises a plurality of output switches switching electrical connections between a plurality of amplifiers for providing a gradation voltage and a plurality of data lines corresponding to the amplifiers and provided with the gradation voltage, respectively, a first charge sharing line sharing electric charges of the plurality of data lines, a second charge sharing line sharing electric charges between first and last data lines connected to first and last amplifiers in the plurality of amplifiers, and a plurality of charge sharing switches switching electrical connections between the first charge sharing line and the plurality of data lines, wherein first and last charge sharing switches in the plurality of charge sharing switches switch electrical connections between the first data line and the second charge sharing line and between the last data line and the second charge sharing line in response to a control signal, and wherein the first charge sharing line and the second charge sharing line are electrically connected in parallel between the first and last charge sharing switches.