Pixel for controlling current flowing from power supply and organic light emitting display using the same

摘要

A pixel capable of displaying an image with uniform brightness is disclosed. In one aspect, the pixel includes an organic light emitting diode (OLED), a first transistor for controlling an amount of current that flows from a first power supply to a second power supply via the OLED in response to a voltage applied to a first node. The pixel also includes a second transistor that is coupled between a bias power supply and the first node and whose gate electrode is coupled to an emission control line. The pixel further includes a third transistor that is coupled between an anode electrode of the OLED and a feedback line and whose gate electrode is coupled to a control line.

主权项

1. A pixel, comprising:
an organic light emitting diode (OLED); a first transistor configured to control an amount of current that flows from a first power supply to a second power supply via the OLED in response to a voltage applied to a first node, wherein the first transistor is directly connected to the OLED; a second transistor operatively coupled between a bias power supply and the first node, wherein the second transistor comprises a gate electrode coupled to an emission control line; a third transistor operatively coupled between an anode electrode of the OLED and a feedback line, wherein the third transistor comprises a gate electrode coupled to a control line; a fourth transistor operatively coupled between the first node and a data line, wherein the fourth transistor comprises a gate electrode coupled to a scan line; a storage capacitor comprising a first terminal coupled to the first node and a second terminal coupled to the first power supply; and a fifth transistor operatively coupled between a reference power supply and the second terminal of the storage capacitor, wherein the fifth transistor comprises a gate electrode coupled to the emission control line.