Pixel and organic light emitting display using the same

摘要

A pixel capable of compensating for the deterioration of an organic light emitting diode (OLED). The pixel includes an OLED coupled between first and second power sources, a pixel circuit including a driving transistor coupled between the first power source and the OLED and having a gate electrode coupled to a first node so that driving current corresponding to a voltage applied to the first node is supplied to the OLED, and a compensation circuit for controlling the voltage of the first node in accordance with deterioration of the OLED to compensate for the deterioration of the OLED. The compensation circuit includes first and second transistors coupled between the OLED and a third power source, first and second feedback capacitors coupled between the first node and a second node that is between the first transistor and the second transistor, and a third transistor coupled to the third power source.

主权项

1. A pixel, comprising:
an organic light emitting diode (OLED) coupled between a first power source and a second power source; a pixel circuit comprising a driving transistor coupled between the first power source and the OLED and having a gate electrode electrically coupled to a first node so that driving current corresponding to a driving voltage applied to the first node is supplied to the OLED; and a compensation circuit for controlling the driving voltage applied to the first node in accordance with deterioration of the OLED to compensate for the deterioration of the OLED, wherein the compensation circuit comprises:
first and second transistors coupled between the OLED and a third power source;first and second feedback capacitors coupled between the first node and a second node that is between the first transistor and the second transistor; anda third transistor coupled between the third power source and a third node that is between the first feedback capacitor and the second feedback capacitor, and wherein the pixel circuit further comprises:
a first capacitor having a first terminal coupled to the first node and a second terminal coupled to a fourth node configured to receive a data voltage, the first capacitor being configured to receive the data voltage from the fourth node at the second terminal and to apply the driving voltage to the first node from the first terminal; anda switching transistor coupled between the fourth node and a data line.