Pixel having plurality of storage capacitors, display device including the pixel, and driving method of the display device

A driving method of a display device including a plurality of pixels, each including a driving transistor, a first storage capacitor, and a second storage capacitor, and a compensation capacitor, the compensation capacitor including one electrode directly connected to a gate electrode of the driving transistor and another electrode directly connected to a first operation control transistor and a second operation control transistor and electrically connected to one of the first and second storage capacitors through the first operation control transistor and the second operation control transistor, the method comprising:

• programming first frame data to the first storage capacitor of each of the plurality of pixels during a first scan period;
• programming second frame data to the second storage capacitor of each of the plurality of pixels during a second scan period;
• and
• emitting light through the plurality of pixels by a driving current flowing in the driving transistor of each of the plurality of pixels according to the first frame data programmed to the first storage capacitor during a first light emitting period,
• wherein the second scan period and the first light emitting period are temporally overlapped, and
• wherein a voltage supplied to the first storage capacitor in the first scan period is different from a voltage supplied to the driving transistor in the first light emitting step.

A pixel comprising:

• an organic light emitting diode (OLED);
• a driving transistor configured to be electrically connected to a first driving voltage and to supply a driving current to the OLED;
• a compensation capacitor configured to store a threshold voltage of the driving transistor;
• a first operation control transistor including one electrode directly connected to another electrode of the compensation capacitor and configured to be controlled by a first operation control signal;
• a second operation control transistor including one electrode directly connected to the other electrode of the compensation capacitor and configured to be controlled by a second operation control signal;
• a first storage capacitor including one electrode connected to another electrode of the first operation control transistor and another electrode connected to a set reference voltage different from the first driving voltage;
• and
• a second storage capacitor including one electrode connected to another electrode of the second operation control transistor and another electrode connected to the reference voltage,
• wherein the compensation capacitor includes one electrode directly connected to a gate electrode of the driving transistor and another electrode selectively connected to the first and second storage capacitors, and
• wherein the second operation control transistor is configured such that when it is turned on, the second storage capacitor and the compensation capacitor are connected during a period in which the first operation control transistor is turned off such that a data voltage is stored to the first storage capacitor according to a corresponding data signal.

A display device comprising:

• a plurality of data lines for transmitting a plurality of data signals;
• a plurality of first scan lines for transmitting a plurality of first scan signals;
• a plurality of second scan lines for transmitting a plurality of second scan signals;
• a first operation control line and a second operation control line for transmitting a first operation control signal and a second operation control signal;
• a first voltage line for transmitting a first driving voltage and a second voltage line for transmitting a second driving voltage;
• and
• a plurality of pixels each connected to a corresponding data line of the data lines, a corresponding first scan line of the first scan lines, a corresponding second scan line of the second scan lines, the first operation control line, the second operation control line, the first voltage line, and the second voltage line,
• wherein each of the pixels includes:
• an organic light emitting diode (OLED) including a cathode connected to the second voltage line;
• a driving transistor connected to the first voltage line for supplying a driving current to the OLED;
• a compensation capacitor connected to a gate electrode of the driving transistor;
• and
• a first storage capacitor and a second storage capacitor connected between the compensation capacitor and a source of the first driving voltage, and
• wherein the display device is configured to provide:
• a first period in which the first storage capacitor is connected to the corresponding data line according to both a first scan signal of the first scan signals transmitted through the corresponding first scan line and the first operation control signal transmitted through the first operation control line, and the compensation capacitor is blocked;
• and
• a second period temporally overlapped with the first period and in which the second storage capacitor is blocked from the corresponding data line and is connected to the compensation capacitor according to both a second scan signal of the second scan signals transmitted through the corresponding second scan line and the second operation control signal transmitted through the second operation control line, and
• wherein a voltage supplied to the first storage capacitor in the first period is different from a voltage supplied to the driving transistor in the second period.