PIXEL CIRCUIT AND ORGANIC LIGHT EMITTING DISPLAY DEVICE INCLUDING THE SAME

摘要

A pixel circuit includes an organic light emitting diode including an anode and a cathode connected to a low power voltage, a first transistor including a gate electrode, a first electrode connected to a high power voltage, and a second electrode connected to the anode, a storage capacitor connected between the high power voltage and the gate electrode of the first transistor, a second transistor including a first electrode which receives a data signal corresponding to an emission sustaining voltage or an emission finishing voltage, a second electrode connected to the gate electrode of the first transistor, and a gate electrode which receives an erase scan signal, and a third transistor including a first electrode connected to an emission starting voltage, a second electrode connected to the gate electrode of the first transistor, and a gate electrode which receives a write scan signal.

主权项

1. A pixel circuit comprising:
an organic light emitting diode comprising an anode, and a cathode connected to a low power voltage; a first transistor comprising a gate electrode, a first electrode connected to a high power voltage, and a second electrode connected to the anode of the organic light emitting diode; a storage capacitor connected between the high power voltage and the gate electrode of the first transistor; a second transistor comprising a first electrode which receives a data signal having an emission sustaining voltage or an emission finishing voltage, a second electrode connected to the gate electrode of the first transistor, and a gate electrode which receives an erase scan signal; and a third transistor comprising a first electrode connected to an emission starting voltage, a second electrode connected to the gate electrode of the first transistor, and a gate electrode which receives a write scan signal, wherein an emission of the organic light emitting diode is started when the first transistor is turned on in response to the emission starting voltage applied to the gate electrode of the first transistor through the third transistor, wherein the emission of the organic light emitting diode is sustained when the first transistor is turned on in response to the emission sustaining voltage applied to the gate electrode of the first transistor through the second transistor, and wherein the emission of the organic light emitting diode is finished when the first transistor is turned off in response to the emission finishing voltage applied to the gate electrode of the first transistor through the second transistor.