ACTIVE MATRIX ORGANIC LIGHT-EMITTING DIODE PIXEL CIRCUIT AND OPERATING METHOD THEREOF

摘要

An active matrix organic light-emitting diode pixel circuit and an operating method thereof are provided to apply a constant current according to an inputted data signal in regardless of threshold voltage change and unevenness by storing and compensating a threshold voltage of the driving transistor at each line. In an active matrix organic light-emitting diode pixel circuit and an operating method thereof, a driving transistor(N1) transmits a driving voltage from a power terminal. A second transistor(N2) applies a current from the first transistor in an organic light-emitting DIODE, and a third transistor(N3) connects the power terminal and a gate of first transistor. A first capacitor is connected between the gate of the transistor and a first electrode of the first capacitor, and a fourth transistor(N4) is between a second electrode of the first capacitor and a source of the first transistor. The first electrode of the second is connected with the second electrode of the first capacitor.