Organic light emitting display

An organic light emitting display, comprising:

• a display panel, on which a plurality of pixels each including an organic light emitting diode and a driving thin film transistor (TFT), for controlling a current flowing in the organic light emitting diode, are disposed;
• a timing controller configured to modulate input digital video data to compensate for changes in electric characteristic of the driving TFT;
• and
• a driving circuit unit configured, in an image display period of each image frame, to:
• sense the changes in electric characteristic of the driving TFT of each of specific pixels on one display line selected among display lines of the display panel and apply luminance recovery data to the specific pixels based on the sensed changes, the image display period being a remaining period excluding a vertical blank period from each image frame;
• and
• sequentially apply image display data to pixels on remaining lines among the display lines of the display panel, except the specific pixels along one direction, while not sensing the changes in electric characteristic of the driving TFT of the pixels on the remaining lines,
• wherein one image frame assigned to the specific pixels includes:
• a first initialization period, in which a source voltage of the driving TFT included in each of the specific pixels is firstly initialized to a reference voltage,
• a programming period, in which a sensing data voltage is applied to a gate electrode of the driving TFT in the first initialization state of the source voltage of the driving TFT and sets the driving TFT to a turn-on state,
• a sensing period, in which the source voltage of the driving TFT increased by a current flowing in the driving TFT is sensed and stored for a predetermined period of time,
• a sampling period, in which the sensed source voltage is sampled and detects the changes in the electric characteristic of the driving TFT,
• a second initialization period, in which the source voltage of the driving TFT is secondly initialized to the reference voltage, and
• an emission period, in which a luminance recovery data voltage is applied to the gate electrode of the driving TFT in the second initialization state of the source voltage of the driving TFT to turn on the driving TFT, and the organic light emitting diode operates using a luminance recovery driving current applied through the driving TFT to display a luminance recovery image, and
• wherein one image frame assigned to the pixels on the remaining lines includes:
• an initialization period, in which a source voltage of the driving TFT included in each of the pixels on the remaining lines is initialized to the reference voltage,
• a programming period, in which an image display data voltage is applied to the gate electrode of the driving TFT in the initialization state of the source voltage of the driving TFT and turns on the driving TFT, and
• an emission period, in which the organic light emitting diode operates using an image display driving current applied through the driving TFT and displays an original image.