Data driver, organic light emitting display device using the same, and method of driving the organic light emitting display device

摘要

A data driver capable of displaying images with a substantially uniform brightness, an organic light emitting display device using the same, and a method of driving the organic light emitting display device. The data driver includes a current sink unit for controlling a predetermined current to flow through a data line, a voltage generator for resetting values of gray scale voltages using a compensation voltage generated when the predetermined current flow s, a digital-to-analog converter for selecting one gray scale voltage among the gray scale voltages as a data signal in response to bit values of data supplied from the outside, and a switching unit for supplying the data signal to the data line. The predetermined current may be set equal to pixel currents that correspond to a maximum brightness.