Patent ID: 8232950

Claim:
A liquid crystal display comprising: a liquid crystal display panel including data lines and gate lines crossing each other, and liquid crystal cells arranged in a matrix format; a horizontal polarity controller that compares digital video data with a critical value and inverts a logic state of a horizontal polarity conversion signal when polarities of the digital video data lean based on the comparative result; a data drive circuit that converts the digital video data into positive and negative data voltages and controls horizontal polarity inversion periods of the data voltages in response to the horizontal polarity conversion signal; and a gate drive circuit that supplies scan signals to the gate lines, wherein the critical value includes: a first critical value that is compared with the digital video data; a second critical value that is compared with a difference between the number of data to be displayed as a positive data voltage and the number of data to be displayed as a negative data voltages among the digital video data equal to or larger than the first critical value; and a third critical value that is compared with the total number of unbalanced lines, in which the difference is equal to or larger than the second critical value, during one frame period, the unbalanced line being a line in which polarities of the data lean to any one polarity.