Pixel and organic light emitting display device having the same
An organic light emitting display device includes a plurality of pixels. Each of the pixels includes an organic light emitting diode, first to third transistors, a storage capacitor, and a first capacitor. The second transistor includes a gate electrode receiving a first scan signal, a first electrode receiving a data signal, and a second electrode connected to a first electrode of the first transistor. The third transistor includes a gate electrode receiving a second scan signal, a first electrode connected to a second electrode of the first transistor, and a second electrode connected to a gate electrode of the first transistor. The storage capacitor includes a first electrode receiving a power voltage and a second electrode connected to the gate electrode of the first transistor. The first capacitor includes a first electrode connected to the gate electrode of the third transistor and a second electrode receiving the power voltage.
1. An organic light emitting display device comprising a plurality of pixels,
wherein each of the plurality of pixels includes:
an organic light emitting diode (OLED);
a first transistor including a gate electrode, a first electrode, and a second electrode, the first transistor being a driving transistor which controls a current flowing into the OLED based on a data signal;
a second transistor including a gate electrode receiving a first scan signal, a first electrode receiving the data signal, and a second electrode connected to the first electrode of the first transistor;
a third transistor including a gate electrode receiving a second scan signal, a first electrode connected to the second electrode of the first transistor, and a second electrode connected to the gate electrode of the first transistor;
a storage capacitor including a first electrode receiving a first power voltage and a second electrode connected to the gate electrode of the first transistor; and
a first capacitor including a first electrode connected to the gate electrode of the third transistor and a second electrode receiving the first power voltage.
2. The organic light emitting display device of claim 1 , wherein
the first transistor and the third transistor are metal-oxide-semiconductor (MOS) transistors, and
a channel type of the first transistor is different from a channel type of the third transistor.
3. The organic light emitting display device of claim 1 , wherein
the second transistor and the third transistor are MOS transistors, and
a channel type of the second transistor is different from a channel type of the third transistor, and wherein
the second scan signal is a signal that is the first scan signal inverted.
4. The organic light emitting display device of claim 1 , wherein each of the plurality of pixels further includes:
a fourth transistor including a gate electrode receiving a third scan signal, a first electrode receiving an initialization voltage that differs from the first power voltage, and a second electrode connected to the gate electrode of the first transistor;
a fifth transistor including a gate electrode receiving an emission control signal, a first electrode receiving the first power voltage, and a second electrode connected to the first electrode of the first transistor;
a sixth transistor including a gate electrode receiving the emission control signal, a first electrode connected to the second electrode of the first transistor, and a second electrode connected to a first electrode of the OLED; and
a seventh transistor including a gate electrode receiving a fourth scan signal, a first electrode receiving the initialization voltage, and a second electrode connected to the first electrode of the OLED.
5. The organic light emitting display device of claim 4 ,
wherein the first transistor, the fifth transistor, and the sixth transistor are p-channel MOS transistors, and
wherein the fourth transistor and the seventh transistor are n-channel MOS transistors.
6. The organic light emitting display device of claim 4 ,
wherein the first transistor is a p-channel MOS transistor, and
wherein the second through seventh transistors are n-channel MOS transistors.
7. The organic light emitting display device of claim 1 , wherein each of the plurality of pixels further includes:
a second capacitor including a first electrode connected to the gate electrode of the first transistor and a second electrode connected to the gate electrode of the third transistor.
8. The organic light emitting display device of claim 7 , wherein a first capacitance of the first capacitor is larger than a second capacitance of the second capacitor.
9. A pixel comprising:
an organic light emitting diode (OLED);
a first transistor including a gate electrode, a first electrode, and a second electrode, the first transistor being a driving transistor which controls a current flowing into the OLED based on a data signal;
a second transistor including a gate electrode receiving a first scan signal, a first electrode receiving the data signal, and a second electrode connected to the first electrode of the first transistor;
a third transistor including a gate electrode receiving a second scan signal, a first electrode connected to the second electrode of the first transistor, and a second electrode connected to the gate electrode of the first transistor;
a storage capacitor including a first electrode receiving a first power voltage and a second electrode connected to the gate electrode of the first transistor; and
a first capacitor including a first electrode connected to the gate electrode of the third transistor and a second electrode receiving the first power voltage.
10. The pixel of claim 9 , wherein
the first transistor and the third transistor are metal-oxide-semiconductor (MOS) transistors, and
a channel type of the first transistor is different from a channel type of the third transistor.
11. The pixel of claim 9 ,
wherein the second transistor and the third transistor are MOS transistors, and
a channel type of the second transistor is different from a channel type of the third transistor, and
wherein the second scan signal is a signal that is the first scan signal inverted.