Organic light-emitting display configured to correct image data and method of driving the same

An organic light-emitting display comprising:

• a display unit comprising a plurality of pixels;
• and
• a controller configured to correct first image data that is black data having a first gray level, which is included in image data, to have a second gray level that is higher than the first gray level based on first correction data or second correction data provided alternately at intervals of N frames,
• wherein a pixel displaying the first image data corrected based on the first correction data and a pixel displaying the first image data corrected based on the second correction data are different, where N is an integer of one or more,
• wherein each pixel comprises:
• an organic light-emitting diode configured to emit light;
• a driving transistor configured to control a driving current flowing through the organic light-emitting diode;
• a driving capacitor configured to provide a gate voltage to the driving transistor;
• a threshold voltage compensation transistor having a first terminal coupled to a drain of the driving transistor, and having a second terminal coupled to the driving capacitor and a gate of the driving transistor;
• a bypass transistor coupled in parallel to the threshold voltage compensation transistor, having a first terminal directly coupled to an anode of the organic light-emitting diode, and having a second terminal coupled to an initialization voltage;
• and
• an initialization transistor having a first terminal coupled to the driving capacitor and to the gate of the driving transistor, and having a second terminal coupled to the initialization voltage,
• wherein the driving capacitor is configured to be charged with a data voltage corresponding to the second gray level at the intervals of N frames, and
• wherein the data voltage corresponding to the second gray level causes an anode voltage of the organic light-emitting diode to be lower than a threshold voltage of the driving transistor.

A method of driving an organic light-emitting display, the method comprising:

• analyzing image data input from an external source;
• generating first and second corrected image data by correcting first image data that is a black data having a first gray level, which is included in the image data, to have a second gray level that is higher than the first gray level;
• and
• displaying an image corresponding to the first corrected image data or the second corrected image data,
• wherein the first corrected image data is generated by correcting the first image data at intervals of N frames, where N is an integer of one or more,
• wherein each pixel of a plurality of pixels comprises
• an organic light-emitting diode configured to emit light;
• a driving transistor configured to control a driving current flowing through the organic light-emitting diode;
• a driving capacitor configured to provide a gate voltage to the driving transistor;
• a threshold voltage compensation transistor having a first terminal coupled to a drain of the driving transistor, and having a second terminal coupled to the driving capacitor and a gate of the driving transistor;
• a bypass transistor coupled in parallel to the threshold voltage compensation transistor, having a first terminal directly coupled to an anode of the organic light-emitting diode, and having a second terminal coupled to an initialization voltage;
• and
• an initialization transistor having a first terminal coupled to the driving capacitor and to the gate of the driving transistor, and having a second terminal coupled to the initialization voltage, and
• wherein the driving capacitor is configured to be charged with a data voltage corresponding to the second gray level at the intervals of N frames.