Pixel, display device comprising the pixel and driving method of the display device

A pixel comprising:

• an organic light emitting diode;
• a first transistor electrically coupled to a first power source voltage and configured to supply a driving current to the organic light emitting diode;
• a second transistor coupled to a corresponding one of a plurality of data lines and configured to transmit a data voltage according to a data signal of one frame to a gate electrode of the first transistor;
• a third transistor coupled to a gate electrode and a drain electrode of the first transistor and configured to diode-connect the first transistor for a period in one frame;
• a fourth transistor coupled between the first transistor and the organic light emitting diode and configured to control supply of the driving current;
• a first capacitor coupled to the gate electrode of the first transistor;
• and
• a second capacitor comprising one electrode coupled to the first capacitor and another electrode coupled to the first power source voltage,
• wherein while the fourth transistor is turned off, a voltage according to a data signal of the previous frame is reset, the third transistor is turned on and the threshold voltage of the first transistor is compensated for, and the second transistor is configured to be turned on and a data voltage according to a data signal of the one frame is programmed, and
• while the fourth transistor is turned on, the organic light emitting diode is configured to emit light according to the driving current.

A pixel comprising:

• an organic light emitting diode;
• a fifth transistor electrically coupled to a first power source voltage and configured to supply a driving current to the organic light emitting diode;
• a sixth transistor coupled to a corresponding one of a plurality of data lines and configured to transmit a data voltage according to a data signal of one frame to a gate electrode of the fifth transistor;
• a seventh transistor coupled to a gate electrode and a drain electrode of the fifth transistor and configured to diode-connect the fifth transistor for a period in the one frame;
• an eighth transistor coupled between the fifth transistor and the organic light emitting diode and configured to control supply of the driving current;
• a third capacitor coupled to the gate electrode of the fifth transistor;
• a fourth capacitor comprising one electrode coupled to the third capacitor and another electrode coupled to the first power source voltage;
• a ninth transistor located between the sixth transistor and a node coupling the third capacitor and the fourth capacitor, and configured to transmit a data voltage of the data signal of the previous frame of the one frame which is applied through the sixth transistor;
• a tenth transistor located between the corresponding data line and the node and configured to apply a reference voltage transmitted through the data line to the node;
• and
• a fifth capacitor comprising one electrode coupled to a source electrode of the ninth transistor and another electrode coupled to a gate electrode of the tenth transistor, and configured to store a data voltage according to the data signal of the one frame for a time,
• wherein while the eighth transistor is turned on, the organic light emitting diode is configured to emit light according to the driving current.

A method of driving a display device comprising a plurality of pixels, each pixel comprising an organic light emitting diode;

• a driving transistor coupled to a first power source voltage and supplying a driving current to the organic light emitting diode;
• a light emission control transistor located between the driving transistor and the organic light emitting diode and controlling light emission by the driving current;
• a compensation capacitor coupled to a gate electrode of the driving transistor;
• and a storage capacitor located between the compensation capacitor and first power source voltage, the method comprising:
• a reset act comprising discharging an anode voltage of the organic light emitting diode and applying a reference voltage to a gate electrode of the driving transistor;
• a compensation act comprising transmitting a voltage corresponding to the threshold voltage of the driving transistor to the compensation capacitor;
• a scan act comprising storing a data voltage according to a corresponding one of a plurality of data signals of one frame, into the storage capacitor;
• and
• a light emission act comprising emitting light through the organic light emitting diode according to a driving current corresponding to the voltage applied to the gate electrode of the driving transistor,
• wherein the light emission control transistors of the pixels are simultaneously turned on and the light emission act of the pixels is simultaneously performed.