Patent ID: 7755578

Claim:
An organic light emitting diode display device, comprising: a display panel including a plurality of first and second scan lines and a plurality of data lines, a plurality of pixels provided at intersections between the plurality of first and second scan lines and the plurality of data lines and a plurality of feedback lines connected to the plurality of pixels; a timing controller; a first gate driver; a second gate driver; and a data driver that generates a plurality of data voltages that have a level proportional to a gray scale level of a digital data supplied from the timing controller, and supplies the data voltages to the plurality of data lines and compensates for the data voltages in accordance with a magnitude of the feedback voltages from the plurality of pixels fed back through the plurality of feedback lines under control of the timing controller, wherein the data driver includes: a plurality of reference data generators that generate a plurality of reference data voltages having a level that is proportional to a gray scale level of a digital data supplied from the timing controller; and a plurality of data compensators that supply a data voltage to the data line connected to itself among a plurality of data lines and making a differential amplification of a reference data voltage applied to itself among reference data voltages from the plurality of reference data generators on the basis of a feedback voltage fed back through a feedback line connected to itself among a plurality of feedback lines to the data line under control of the timing controller; and wherein each of the plurality of data compensators includes: a first switching device that selectively switches the reference data voltage and the data voltage in response to first and second control signals supplied from the timing controller; a second switching device that selectively switches the feedback voltage from the pixel connected to itself and a negative feedback voltage from the output terminal thereof in response to the first and second control signals; a reset unit that resets the feedback line connected to itself in response to the second control signal; and a differential amplifier that makes a differential amplification of a voltage switched by the first switching device and a voltage switched by the second switching device to supply it to the data line.