Data driver, flat panel display device using the same, and driving method thereof

A flat panel display device comprising:

• a display region comprising a plurality of pixels connected to a plurality of scan lines arranged in a first direction and a plurality of data lines arranged in a second direction;
• a data driver supplying analog gray scale voltages to the plurality of pixels;
• and
• a scan driver supplying scan signals to the scan lines,
• wherein the data driver presets a range of the gray scale voltages through upper bits including a most significant bit (MSB) of digital data, and generates the analog gray scale voltages corresponding to the digital data through charge sharing between at least two of the data lines within the preset range and provides the analog gray scale voltages to corresponding ones of the pixels.

A data driving method of a flat panel display device comprising:

• presetting a range of gray scale voltages through upper k bits of input digital data;
• generating last gray scale voltages through charge sharing to correspond to lower bits of the digital data within the preset range of the gray scale voltages;
• and
• applying final ones of the generated gray scale voltages to the corresponding pixels through data lines.