Patent ID: 8723784

Claim:
A brightness control apparatus configured to perform brightness control for backlights formed by plural light-emitting elements for a display screen, comprising: a pulse control signal transmit unit configured to transmit a pulse control signal for performing driving control on the plural light-emitting elements based on a preset brightness control signal; a voltage control unit configured to control a voltage of the pulse control signal obtained by the pulse control signal transmit unit for each set of light-emitting elements of the same color so as to correct brightness variation in a regular state for the plural light-emitting elements; a current control unit configured to control a current for each of the plural light-emitting elements based on a voltage value obtained by the voltage control unit so as to correct brightness variation due to temperature change or temporal change, and a dithering unit configured to perform dithering for the pulse control signal obtained by the current control unit in which the brightness variation has been corrected, wherein the dithering unit controls brightness of the backlights by gray dimming processing using one or more gray frames.