Organic light emitting diode display capable of extending sensing time and reducing an update cycle

An organic light emitting diode display, in which one frame period is divided into a data enable period and a vertical blank period, comprising:

• a data driving circuit configured to convert pixel data into a data voltage and supply the data voltage to data lines of a display panel during the data enable period, and to sense changes in driving characteristics of the display panel within an extended vertical blank period;
• a scan driving circuit configured to supply a scan pulse synchronized with the data voltage to scan lines of the display panel during the data enable period, and to output a scan pulse for sensing the changes in the driving characteristics within the extended vertical blank period;
• and
• a timing controller configured to compensate for data of an input image using a compensation value determined based on the changes in the driving characteristics, transmit the compensated data to the data driving circuit, and control operation timing of the data driving circuit and operation timing of the scan driving circuit,
• wherein the timing controller shortens the data enable period defined by an input timing signal and extends the extended vertical blank period to be longer than the vertical blank period defined by the input timing signal, and
• wherein the scan driving circuit sequentially outputs n scan pulses to a same line of the display panel within the extended vertical blank period so that the data driving circuit sequentially senses changes in driving characteristics for sub-pixels of n colors included in the same line of the display panel within the extended vertical blank period of the one frame period, where n is a positive integer equal to or greater than 2 and equal to or less than 4.