Patent ID: 7119766

Claim:
A display driving method which drives a display to make a gradation display on a screen of the display depending on a length of a sustain time interval in each of N sub fields SF 1 through SF N forming one field, where the field is a time interval in which an image is displayed, n is an integer greater than one, and the sustain time interval is equal to a light emission time and determines a luminance level, said display driving method comprising: dividing one field into a first sub field group L and a second sub field group M; setting a sustain time interval of each sub field in the second sub field group M longer than a sustain time interval of each sub field in the first sub field group L, and so that the second sub field group M includes a plurality of sub fields having a longest sustain time interval; and increasing a sustain time within the second sub field group M when the luminance of the image that is displayed gradually increases, by causing a light emission to start in a predetermined sub field SF Mm having the longest sustain time interval, of the plurality of sub fields having the longest sustain time interval, and additionally causing a light emission in another sub field SF Mm+1 having the longest sustain time interval, of the plurality of sub fields having the longest sustain time interval, in a state where the light emission in the predetermined sub field SF Mm is maintained.