Patent ID: 8537182

Claim:
A light emitting period setting method for a display panel that displays frames of a video signal in a plurality of one-field periods, the method comprising: controlling respective peak luminance levels of the plurality of one-field periods by setting respective total light emitting period lengths for each of the plurality of one-field periods, where the total light emitting period lengths are set to values less than or equal to a maximum value that is less than or equal to 75% of any one of the plurality of one-field periods; arranging N ≧3 light emitting periods within each of the plurality of one-field periods; and setting, for each of the plurality of one-field periods, period lengths of the N ≧3 light emitting periods arranged therein such that the sum total of the period lengths of the N ≧3 light emitting periods arranged in the one-field period equals the total light emitting period set for the one-field period and such that the period lengths of each of the N ≧3 light emitting periods arranged in the one-field period keep a fixed ratio thereamong, the fixed ratio being the same in each of the plurality of one-field periods, wherein as the total light emitting period increases, each of the period lengths of the N ≧3 light emitting periods increase; wherein, for each of the plurality of one-field periods, the N ≧3 light emitting periods arranged therein are arranged within a range period within the one-field period symmetrically about the center of the range period, where the respective range periods of the plurality of one-field periods each have a length equal to the maximum value and are bounded by no-light-emitting periods; wherein, for each of the plurality of one-field periods, the period lengths of the N ≧3 light emitting periods arranged therein are set such that the period length of each of the N ≧3 light emitting periods arranged in the one-field period is comparatively greater than the period length of any of the N ≧3 light emitting periods arranged in the one-field period that is comparatively further from the center of the range period of the one-field period; and wherein, in each of the plurality of one-field periods in which the total light emitting period set therefor is less than the maximum value, each of the N ≧3 light emitting periods arranged therein is separated from adjoining ones of the N ≧3 light emitting periods by no-light-emitting periods.