A thin-film-transistor liquid crystal display comprises a display unit which contains a plurality of scanning lines, a plurality of data lines arranged to cross the plurality of scanning lines and defining a plurality of pixels, and a data driving circuit providing pixel data signals to the plurality of data lines. The pixels of each scanning line are divided into groups of N successive pixels, where N is an integer greater than 1. A polarity of the respective pixel data signals for the data lines within each group is the same as each other. The polarity of the respective pixel data signals for each successive group along at least one of the scanning lines alternates between a first polarity and a second polarity.