Method of driving organic light emitting display apparatus with a defective pixel

A method of driving an organic light emitting display apparatus, the method comprising:

• determining whether input image data, corresponding to a defective pixel which includes two organic light emitting diodes (OLEDs) and has been repaired because at least one of the two OLEDs cannot normally emit light or a normal pixel which is adjacent to the defective pixel and includes two OLEDs normally emitting light, is received;
• when the received input image data is not the input image data corresponding to the defective pixel or the normal pixel, realigning the input image data to generate normal image data;
• when the received input image data is the input image data corresponding to the defective pixel or the normal pixel, changing a gray scale of the input image data by using a compensation value to generate compensation image data;
• and
• generating a normal data voltage corresponding to the normal image data or a compensation data voltage corresponding to the compensation image data to supply the normal data voltage or the compensation data voltage to a panel where the pixels are provided,
• wherein the determining comprises, when the two OLEDs included in the defective pixel are repaired to be connected to a driver included in the normal pixel because a driver which is provided in the defective pixel to drive the two OLEDs is not normally driven, determining whether the input image data is input image data corresponding to the normal pixel.