Patent ID: 7391398

Claim:
A method for displaying (1+N)-level (N is a natural number more than 2) halftone in a liquid crystal display based on a first and a second driving voltages selected for a predetermined unit period among a plurality of predetermined driving voltages, one of the first and the second driving voltages being set for each of frames included in the unit period, and a poiarity of the one of the first and the second driving voltages being inverted for every one or more frames, the method comprising: generating the first driving voltage and the second driving voltage such that a number of frames to which the first driving voltage having a positive polarity is assigned is the same as a number of frames to which the first driving voltage having a negative polarity is assigned, and such that a number of frames to which the second driving voltage having a positive polarity is assigned is the same as a number of frames to which the second driving voltage having a negative polarity is assigned, where the unit period includes 2N frames.