Patent ID: 7834826

Claim:
A data driver of an organic light emitting display device, the device having a plurality of pixels, each of the plurality of pixels being coupled to a data line, the data driver comprising: a ramp pulse generating part for generating a ramp pulse to create a data signal in the data driver; a current digital-to-analog converting part for generating data currents using data received by the data driver; a current control part for: providing the data signal to the data line of the organic light emitting display device; and comparing a pixel current generated in the plurality of pixels and output on a feedback line of the organic light emitting display device with a data current of the data currents to control whether the data signal is further provided to the data line, wherein the current control part comprises a plurality of comparing parts, each of the comparing parts comprising: a transistor coupled between the ramp pulse generating part and the data line: a comparator for receiving the pixel current and comparing the pixel current with the data current; and a control part for controlling the transistor to be turned on or off in accordance with a comparison result of the comparator, wherein the control part is configured to provide a binary signal to control the transistor to be turned on for a first period while a reset signal is provided from a timing controller to the control part.