Liquid crystal display and driving method thereof

A liquid crystal display, comprising:

• a liquid crystal display panel including a plurality of data lines, a plurality of gate lines crossing the data lines, and a plurality of liquid crystal cells;
• a register for storing pixel information of a problem pattern and polarity pattern information corresponding to the problem pattern;
• a block pattern recognition unit for comparing input data and the problem pattern to count the number of problem patterns contained in the input data and comparing the counted value with a first threshold value;
• a line pattern recognition unit for determining the line as a problem line, if the number of problem patterns in one line is greater than the first threshold value;
• a frame pattern recognition unit for comparing the number of problem lines with a second threshold value, and if the number of the problem lines is greater than the second threshold value, determining the frame containing the input data as a problem frame;
• a polarity control signal generating unit for generating vertical and horizontal polarity control signals in the problem frame on the basis of the polarity pattern information;
• and
• source drive integrated circuits (ICs) for controlling the vertical and horizontal polarities of data voltages supplied to the data lines in response to the vertical and horizontal polarity control signals.