Organic light emitting display

摘要

An organic light emitting display includes a display panel including display lines, on which a plurality of pixels each including an organic light emitting diode and a driving thin film transistor (TFT) are formed. The display lines are sequentially charged to an image display data voltage in response to an image display gate pulse in an image display period of one frame. A sensing target display line among the display lines outputs a sensing voltage corresponding to changes in electrical characteristic of the driving TFT included in each pixel in response to a sensing gate pulse during a vertical blank period excluding the image display period from the one frame and then is charged to a luminance recovery data voltage. The sensing gate pulse is supplied in the same pulse shape as the image display gate pulse in a predetermined period for charging the luminance recovery data voltage.

主权项

1. An organic light emitting display comprising:
a display panel including display lines, on which a plurality of pixels each including an organic light emitting diode and a driving thin film transistor (TFT) are formed, the display lines being sequentially charged to an image display data voltage in response to an image display gate pulse in an image display period of one frame, a sensing target display line among the display lines outputting a sensing voltage corresponding to changes in electrical characteristic of the driving TFT included in each pixel in response to a sensing gate pulse during a vertical blank period excluding the image display period from the one frame and then being charged to a luminance recovery data voltage; a gate driving circuit configured to sequentially supply the image display gate pulse to gate lines connected to the pixels of the display lines during the image display period and supply the sensing gate pulse to a gate line connected to the pixels of the sensing target display line during the vertical blank period; and a data driving circuit configured to supply the image display data voltage to data voltage supply lines connected to the pixels of the display lines in synchronization with the image display gate pulse and supply the luminance recovery data voltage to data voltage supply lines connected to the pixels of the sensing target display line in synchronization with the sensing gate pulse, wherein the sensing gate pulse is supplied in the same pulse shape as the image display gate pulse in a predetermined period for charging the luminance recovery data voltage.