Patent ID: 8866716

Claim:
A liquid crystal display device comprising: a liquid crystal panel having a liquid crystal layer and at least a pair of electrodes for applying a voltage across the liquid crystal layer; and a driving circuit for supplying a driving voltage to the liquid crystal panel; the driving circuit configured to classify a combination of a displayed gray-scale level of a previous vertical scanning period and a regular gray-scale level corresponding to an input image signal in a current vertical scanning period into either a first group or a second group, the combination is classified into the first group if a luminance of L 1 +(L 2 −L 1 )·C 1 is reached within a period corresponding to one vertical scanning period when a gray-scale voltage corresponding to the regular gray-scale level is supplied and the combination is classified into the second group if not classified in the first group, L 1 being a luminance corresponding to the displayed gray-scale level of the previous vertical scanning period, L 2 being a luminance corresponding to the regular gray-scale level, and C 1 being a first constant which is greater than zero and equal to or less than 1; and the driving circuit is configured to supply the gray-scale voltage corresponding to the regular gray-scale level for all combination belonging to the first group, and supply a gray-scale voltage corresponding to an alternative gray-scale level for any combination belonging to the second group, the alternative gray-scale level being different from the regular gray-scale level, wherein the alternative gray-scale level corresponds to a luminance of L 1 +(L 3 −L 1 )·C 2 being reached within a period corresponding to one vertical scanning period when the gray-scale voltage corresponding to the alternative gray-scale level is supplied, L 3 being a luminance corresponding to the alternative gray-scale level, and C 2 being a second constant which is greater than zero and equal to or less than 1.