Patent ID: 7164400

Claim:
An organic EL display device having a display panel where a plurality of organic EL elements responsive to the display panel are arranged, comprising: black level setting means for creating a driving command for each organic EL element, by shifting display data for each pixel relevant to an display image to be displayed on a display panel, according to a black level voltage setting level; display data calculating means for calculating a level of estimated current which corresponds to a current which flows in the display panel, based on the display data supplied to the display panel; panel current detecting means for detecting the panel current flowing through all pixels of the display panel; comparing means for comparing the value of the estimated current calculated by the display data calculating means and the level of panel current for corresponding display, which is detected by the panel current detecting means, to obtain a difference; and adjusting means for adjusting the black level voltage setting value based on a result of the comparison by the comparing means.