Patent ID: 8817012

Claim:
A light emitting period setting method for a display panel, the method comprising variably controlling the peak luminance level in each of a plurality of one-field periods, each one-field period corresponding to one frame of a video signal, through control of respective arrangements of light emitting periods in the plurality of one-field periods, said control including: setting a maximum value that is less than or equal to 75% of a one-field period duration, the maximum value being the same for each of the plurality of one-field periods; setting a range within each of the plurality of one-field periods, the range being the same in each of the plurality of one-field periods and having a duration equal to the maximum value, such that for each of the plurality of one-field periods the light emitting periods thereof are arranged only within the range, there being N light emitting periods in each of the plurality of one-field periods, N being equal to or higher than 3; variably setting, for each of the plurality of one-field periods, a total light emitting period length that is less than or equal to the maximum value; and variably setting, for each of the plurality of one-field periods, period lengths of the light emitting periods that are arranged in the respective one-field period, in response to the total light emitting period length set for the respective one-field period such that the period lengths of the light emitting periods keep a fixed ratio thereamong, the fixed ratio being the same in each of the plurality of one-field periods, the sum total of period lengths of the light emitting periods equals the total light emitting period length set for the respective one-field period, the light emitting periods are arranged symmetrically about the center of the range, and the period length of each of the light emitting periods is comparatively greater than the period length of any of the light emitting periods that is comparatively further from the center of the range.