Liquid crystal display

A liquid crystal display, comprising:

• a liquid crystal display panel including a plurality of data lines, an n-number of gate lines crossing the data lines, a plurality of TFTs connected to the crossings of the data lines and the gate lines, and liquid crystal cells connected to the TFTs and arranged in an m×n matrix, wherein the m and n are natural numbers;
• a data driving circuit that converts digital video data into positive/negative data voltages to be supplied to the data lines in response to a vertical polarity control signal and adjusts the horizontal polarity inversion cycle of the positive/negative data voltages in response to a horizontal polarity control signal;
• and
• a timing controller that generates the vertical polarity control signal and the horizontal polarity control signal, adds a frame rate control (FRC) correction value to input digital video data to supply the input digital video data to the data driving circuit, detects a predetermined weak pattern from the input digital video data and, when data having the weak pattern is detected, changes either the logic inversion cycle of the vertical polarity control signal or the logic of the horizontal polarity control signal and changing the position of the data to which the FRC correction value is added.