PIXEL AND ORGANIC LIGHTEMITTING DISPLAY USING THE SAME

摘要

A pixel and an organic light emitting display are provided to compensate for the element degradation due to the light emission and to prevent image deterioration due to threshold voltage deflection by compensating for the threshold voltage of a transistor. In a first transistor(M1), a source is connected to a first power line. A drain of the first transistor is connected to a first node. A gate is connected to a second node. The driving current from the source to the drain is changed. In a second transistor(M2), the source is connected to a data line. The drain is connected to a third node. The gate is connected to a first scan line. The data signal is transmitted from a data line to a pixel. In a third transistor(M3), the source is connected to a first node. The drain is connected to the second node. The gate is connected to the second scan line. In a fourth transistor(M4), the source is connected to an anode electrode of the organic light emitting diode. The drain is connected to the first electrode of the second capacitor. The gate is connected to the third scan line. In a fifth transistor(M5), the source is connected to the first node. The drain is connected to the anode of the organic light emitting diode. The gate is connected to a light emitting control line. The driving current is transmitted to the organic light emitting diode. A first capacitor(C1) is connected between the first power line and the second node and maintains the voltage of the second node. A second capacitor is connected between the second node and the third node. The voltage of the second node is controlled by the coupling operation with the first capacitor.