Organic electroluminescent dispay device

An organic electroluminescent display device, comprising:

• a display panel that includes a plurality of sub-pixels which include a plurality of organic light emitting diodes, respectively, to display a frame image made by a plurality of image data by every frame;
• a data drive IC that outputs a plurality of data voltages to the plurality of sub-pixels, respectively, by every frame, wherein the plurality of data voltages correspond to the plurality of image data, respectively;
• a current detecting portion that detects a first panel current, which is a total of currents applied to the plurality of organic light emitting diodes during a frame, and generates a first comparison value corresponding to the first panel current;
• a current estimating portion that estimates a second panel current from the plurality of image data of the frame and generates a second comparison value corresponding to the second panel current, wherein the second panel current is a total of currents expected to be applied to the plurality of organic light emitting diodes during the frame;
• and
• a brightness control portion that compares the first and second comparison values and adjusts a brightness of a frame image after the frame according to the comparison result obtained by the brightness control portion.