Patent ID: 8638282

Claim:
A liquid crystal display device comprising a plurality of pixels, each including a first subpixel and a second subpixel, wherein each of the first and second subpixels includes: a counter electrode; a subpixel electrode; and a liquid crystal layer interposed between the counter electrode and the subpixel electrode, and wherein the subpixel electrodes of the first and second subpixels are provided separately from each other as first and second subpixel electrodes, respectively, while the first and second subpixels share the same counter electrode with each other, and wherein when a predetermined grayscale tone is displayed through four or more consecutive even number of vertical scanning periods, the first and second subpixels have mutually different luminances in at least two of the even number of vertical scanning periods, first polarity periods that are included in the even number of vertical scanning periods and that maintain a first polarity are as long as second polarity periods that are also included in the even number of vertical scanning periods and that maintain a second polarity for each of the first and second subpixels, and in each of the first and second polarity periods, the difference between the average of effective voltages applied to the liquid crystal layer of the first subpixel and that of effective voltages applied to the liquid crystal layer of the second subpixel is substantially equal to zero, and wherein the polarities of the first and second subpixels are inverted every other vertical scanning period, wherein in either the first polarity periods or the second polarity periods, one of the two vertical scanning periods satisfies |VLspa|>|VLspb| and the other vertical scanning period satisfies |VLspa|<[VLspb|, and wherein in the other polarity periods, VLspa is equal to VLspb in each of the two vertical scanning periods, wherein the effective voltages applied to the respective liquid crystal layers of the first and second subpixels of each said pixel are represented by VLspa and VLspb, respectively.