Patent ID: 7719526

Claim:
A driving method of a display device for expressing gradation by dividing one frame into a plurality of subframes, in the case where gradation is expressed with an n bit (here n is an integral number), comprising: classifying bits each of which is shown by a binary of gray scales into three kinds of bit groups, that is, a first bit group, a second bit group, and a third bit group; dividing the one frame into three subframe groups; dividing each of a (here, a is an integral number satisfying 0<a<n) display periods corresponding to bits belonging to the first bit group into six, and arranging each two of which in each of the three subframe groups of the one frame; dividing each of b (here, b is an integral number satisfying 0<b<n) display periods corresponding to bits belonging to the second bit group into three, and arranging each one of which in each of the three subframe groups of the one frame; and arranging each of c (here c is an integral number satisfying 0<c<n and a+b+c=n) display periods corresponding to bits belonging to the third bit group into (k−1) in any one of three subframe groups of the one frame, wherein an appearance order of a plurality of subframes corresponding to bits belonging to the first bit group and a plurality of subframes corresponding to bits belonging to the second bit group is approximately the same among the three subframe groups of the one frame, and wherein as for a part or all of the plurality of subframes corresponding to bits belonging to the first bit group and the plurality of subframes corresponding to bits belonging to the second bit group, an overlapped time gray scale method is used in each of the three subframe groups of the one frame.