ORGANIC LIGHT EMITTING DISPLAY

摘要

An organic light emitting display includes a display panel, which includes a plurality of pixels and displays an image, and a data driving circuit differently outputting a compensation voltage depending on a sensing value based on a driving current. Each of the plurality of pixels includes an organic light emitting diode, a driving thin film transistor (TFT) having a double gate structure including a main gate electrode and a sub-gate electrode, a switching TFT applying a data voltage determining the driving current to the main gate electrode of the driving TFT, and a compensation TFT applying the compensation voltage for compensating for a shift amount of a threshold voltage of the driving TFT to the sub-gate electrode of the driving TFT.

主权项

1. An organic light emitting display comprising:
a display panel including a plurality of pixels to display an image; and a data driving circuit configured to output data voltage corresponding to the image, wherein each of the plurality of pixels includes: an organic light emitting diode; a first thin film transistor (TFT) having a double gate structure including a main gate electrode connected to a first node and a sub-gate electrode connected to a third node; a second TFT configured to apply the data voltage to the main gate electrode of the first TFT; a first storage capacitor connected to the first node and a second node between the organic light emitting diode and the first TFT; a second storage capacitor connected to the third node and the second node; and a third TFT connected to the sub-gate electrode of the first TFT, wherein at least one of the plurality of pixels further includes a fourth TFT connected to the second node, and wherein the second storage capacitor has a first terminal connected to the sub-gate of the first TFT and the third TFT, and a second terminal directly connected to the fourth TFT and the organic light emitting diode.