The liquid crystal display device includes a display panel for displaying a picture thereon, first to (n)th upper data drive ICs for supplying pixel voltages to one side of each data line in the display panel, first to (n)th bottom data drive ICs for supplying pixel voltages to the other side of each data line, a first timing controller for generating an upper data control signal and for controlling operation of the upper data drive ICs, and a second timing controller for generating a bottom data control signal and for controlling operation of the bottom data drive ICs wherein at least one of the first and second timing controllers analyzes the picture data applied thereto and controls the polarities of the pixel voltages to be forwarded from the upper data drive ICs and the bottom data drive ICs with reference to the result of the analysis.