Patent ID: 8564625

Claim:
A display device, where one frame is divided into a plurality of sub-frames to display a gray scale, wherein the plurality of sub-frames consist of M (M is an integer number of greater than or equal to 2) regular sub-frames which is necessary for displaying a maximum of 2 M predetermined gray scales and N (N is a natural number) additive sub-frames that are necessary for displaying an alternative lighting pattern for selected gray scales, wherein weightings of the M regular sub-frames sum to 2 M −1, wherein weightings of the N additive sub-frames are all less than a maximum weighting of the M regular sub-frames, wherein at least two sub-frame lighting patterns of a first sub-frame lighting pattern and a second sub-frame lighting pattern are provided at least for one gray scale of the predetermined gray scales, wherein the first sub-frame lighting pattern uses only the regular sub-frames, wherein the second sub-frame lighting pattern uses the additive sub-frames and the regular sub-frames, wherein at least one sub-frame having a minimum weighting in the N additive sub-frames has a same weighting as at least one sub-frame having a minimum weighting in the M regular sub-frames, wherein all gray scales greater than a certain gray scale and including the certain gray scale are displayed by at least two sub-frame lighting patterns having different combinations of weights, the different combinations of weights having at least one different weight value, and wherein a sub-frame lighting pattern of a first pixel is selected based on a gray scale or a corresponding sub-frame lighting pattern of a second pixel, wherein the second pixel is positioned immediately preceding or following the first pixel with no intervening pixel therebetween.