ORGANIC LIGHT EMITTING DISPLAY DEVICE AND A DRIVING METHOD THEREOF, CAPABLE OF CONTROLLING GAMMA VOLTAGE BY USING A COMPARISON POWER SOURCE

摘要

PURPOSE: An organic light emitting display device and a driving method thereof are provided to display an image with desired brightness by controlling a gamma voltage even when a reference voltage is changed.;CONSTITUTION: In an organic light emitting display device and a driving method thereof, a scan driver(110) drives scanning lines and luminous control lines. A data driving unit(120) selects one among gamma voltages to generate a data signal. A pixel compensates the voltage drop of a first power by using a reference power. A gamma voltage controller(160) compares voltages of a comparison power and controls the voltage of gamma voltages in response to a comparison result.;COPYRIGHT KIPO 2011