Patent ID: 8319761

Claim:
An organic light emitting display configured to be driven using a frame divided into a plurality of sub-frames, the organic light emitting display comprising: a data driver configured to supply a plurality of data signals to output lines during a first period of one horizontal period of the sub-frame; a scan driver configured to sequentially supply a scan signal to scan lines during a second period of the one horizontal period of the sub-frame; a demultiplexer coupled to each output line, the demultiplexer being configured to supply the data signals to a plurality of data lines; buffers configured to supply signals from the demultiplexers to the data lines, the buffers including PMOS transistors; and pixels disposed at intersections of the scan lines and the data lines, the pixels being configured to display images corresponding to the data signals, wherein each of the buffers includes: an input unit coupled between a first power source and a second power source, the second power source outputting a voltage less than that of the first power source, the input unit configured to control a voltage of a first output terminal coupled to an output unit in accordance with a level of a voltage supplied to an input terminal, and the output unit coupled between the first power source and the second power source, and configured to output one voltage of the first and second power sources to a second output terminal in accordance with a voltage supplied to the first output terminal, wherein the input unit includes: a seventh transistor coupled between the first output terminal and the first power source, and configured to be driven in accordance with the voltage supplied to the input terminal, a fifth transistor coupled between the first output terminal and the second power source, a sixth transistor coupled between a gate electrode of the fifth transistor and the second power source, and a second capacitor coupled between a gate electrode and a first electrode of the fifth transistor.