Patent ID: 7907137

Claim:
A drive control method of a display apparatus which displays image information corresponding to display data, the apparatus comprising a display panel having a plurality of display pixels arranged therein, each of the pixels comprising a current control type optical element and a drive element which supplies a driving current to the optical element, at respective intersections of a plurality of selection lines and a plurality of data lines arranged to respectively extend in a row direction and in a column direction, the method comprising: detecting a threshold voltage peculiar to the drive element of each said display pixel through the data lines; generating a compensation voltage for compensating for the threshold voltage of the drive element of each said display pixel based on each said threshold voltage, applying the compensation voltage to the drive element of each said display pixel through the data lines, and allowing the drive element to hold the compensation voltage as a voltage component; supplying, as a gradation signal to each said display pixel through the data lines, after the drive element of the display pixel holds the voltage, a gradation current having a current value for allowing the optical element of the display pixel to perform a light emitting operation at a luminance corresponding to a luminance gradation of the display data, adding a voltage component based on the gradation signal to the voltage component based on the compensation voltage, and allowing the drive element of each said display pixel to hold the voltage component; and supplying the driving current created based on the voltage component held in the drive element of each said display pixel to the optical element, and allowing the optical element to be operated in accordance with the gradation signal.