Method of driving organic light emitting display device

A method for driving an organic light emitting display device, comprising:

• measuring a characteristic of a panel;
• storing a measured loading correction value in a first lookup table, the measured loading correction value including loading information of red pixels, green pixels, and blue pixels that correspond to predetermined gray scale values based on the characteristic of the panel;
• storing a first gamma value of the red pixels corresponding to the characteristic of the panel, a second gamma value of the green pixels corresponding to the characteristic of the panel, and a third gamma value of the blue pixels corresponding to the characteristic of the panel in a second lookup table;
• and
• obtaining a calculated loading correction value based on pre-stored equations, the first lookup table, and the second lookup table, the calculated loading correction value including loading information corresponding to gray scale values different from the predetermined gray scale values.