A liquid crystal display device includes a display unit including a plurality of liquid crystal cells at crossing regions of a plurality of data lines and a plurality of gate lines, a source driver for supplying source voltages to the plurality of data lines, and a temperature sensor for sensing an ambient temperature and for outputting an temperature sensing signal corresponding to the ambient temperature, wherein the source driver includes a source amplifying register unit for controlling a rising slope of the source voltages in accordance with the temperature sensing signal.