Patent ID: 8199093

Claim:
A liquid crystal display comprising: a liquid crystal display panel including a plurality of liquid crystal cells arranged at crossings of a plurality of data lines and a plurality of gate lines in a matrix format; a timing signal multiplying circuit that multiplies a frequency of a timing signal; a timing control signal generating circuit that generates a polarity control signal based on the timing signal of which the frequency is multiplied by the timing signal multiplying circuit, a phase of the polarity control signal being periodically inverted; a polarity control signal inverting circuit that inverts the polarity control signal in response to pulses of an inverse periodic signal to generate an inverse polarity control signal, the inverse periodic signal being inverted every constant time interval; a data drive circuit that respectively converts digital video data and digital black data into a video data voltage and a black gray level voltage, inverts a polarity of the video data voltage and a polarity of the black gray level voltage in response to the inverse polarity control signal, and supplies the video data voltage and the black gray level voltage, whose the polarities are inverted, to the data lines; and a gate drive circuit that supplies gate pulses to the gate lines.