Pixel, organic light emitting display device including the same, and method of operating of the organic light emitting display device

An organic light emitting display device, comprising:

• a plurality of data lines;
• a scan driver supplying a scan signal to a plurality of scan lines;
• a sensing control line driver supplying a sensing control signal to a plurality of sensing control lines;
• a data driver supplying a data signal to a plurality of data output lines;
• a switching unit coupling each data line to one of a corresponding data output line and a corresponding sensing line and supplying a write control signal to each write control line;
• a pixel disposed at an intersection of an i-th data line of the plurality of the data lines and a j-th (j is a natural number) scan line of the plurality of the scan lines,
• wherein the pixel includes:
• an organic light emitting diode;
• a precharge circuit charging a first voltage corresponding to a data signal supplied through the i-th data line when a scan signal is supplied through the j-th scan line;
• a pixel circuit charging a second voltage corresponding to the first voltage when a write control signal is supplied through an i-th write control line of the plurality of the write control lines, and supplying current corresponding to the charged second voltage from a first power source to a second power source via the organic light emitting diode, wherein the i-th write control line is extended in parallel to the i-th data line;
• and
• a sensing control circuit coupling the i-th data line and an anode electrode of the organic light emitting diode in response to a sensing control signal supplied through a j-th sensing control line of the plurality of the sensing control line,
• wherein the sensing control circuit includes:
• a second transistor coupled between the data line and a second node, the second transistor being turned on in response to the sensing control signal;
• a second capacitor coupled between the second node and a fourth power source;
• and
• a third transistor coupled between the data line and the anode electrode of the organic light emitting diode, the third transistor being turned on in response to a voltage at the second node, and
• wherein the second capacitor charges a third voltage corresponding to the data signal supplied through the data line, when the second transistor is turned on, in response to a first sensing control signal of the sensing control signal, and wherein the second capacitor discharges the third voltage charged to the data line, when the second transistor is turned on and when the data signal is not supplied to the data line, in response to a second sensing control signal of the sensing control signal.

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

• generating a write control signal;
• selectively not supplying the write control signal to one write control signal line of a plurality of a control signal lines and supplying the write control signal to remaining write control signal lines of the plurality of the control signal lines;
• emitting light from first pixels based on first data signals of first data lines corresponding to the remaining write control signal lines;
• and
• sensing degradation information of an organic light emitting diode or threshold voltage/mobility information of a driving transistor of each of second pixels of a second data line corresponding to the one write control signal line that does not supply the write control signal,
• wherein the sensing of the degradation information or threshold voltage/mobility information includes:
• charging a third voltage corresponding to the first data signals supplied to the second pixels through the second data line, in response to a first sensing control signal;
• and
• discharging the third voltage, in response to a second sensing control signal, and
• wherein the second pixels do not emit light.