Patent ID: 8654044

Claim:
A display device including a processing unit, and a display unit having pixels, each of which includes a luminescence element that individually becomes luminous depending on a current amount and a pixel circuit for controlling a current applied to the luminescence element according to a voltage signal, scan lines which supply a selection signal for selecting pixels to be luminous to the pixels in a predetermined scanning cycle, and data lines which supply to the pixels the voltage signal according to an input picture signal, the pixels, the scan lines, and the data lines arranged in a matrix pattern, the processing unit configured to: calculate average luminance for a predetermined period of the input picture signal; multiply primary colour signals of the picture signal respectively by adjustment values for the respective primary colour signals based on a voltage-current characteristic; calculate average luminance for the predetermined period for a first area, based on the picture signal multiplied by the adjustment values, the first area corresponding to an entire display screen; calculate average luminance for the predetermined period for a second area, based on the picture signal multiplied by the adjustment values, the second area being smaller than the first area in horizontal and vertical directions; and select for output, as the average luminance, a larger value out of an average luminance calculated for the first area and an average luminance calculated for the second area; and set an effective duty depending on the calculated average luminance, the effective duty regulating for each one frame a luminous time for which the luminescence element is luminous.