Pixel circuit and organic light emitting display device including the same

摘要

A pixel circuit and organic light emitting display device using the pixel circuit are disclosed. One aspect of the pixel circuit includes an organic light emitting diode, a switching transistor configured to transfer a data signal in response to a scan signal, a storage capacitor configured to store the data signal transferred through the switching transistor, an amplifying unit configured to amplify the data signal stored in the storage capacitor to generate an amplified signal having a swing range greater than a swing range of the data signal, and a driving transistor configured to drive the organic light emitting diode in response to the amplified signal.

主权项

1. A pixel circuit, comprising:
an organic light emitting diode; a switching transistor configured to transfer a data signal in response to a scan signal; a storage capacitor configured to store the data signal transferred through the switching transistor; an amplifying unit configured to amplify the data signal stored in the storage capacitor so as to generate an amplified signal having a swing range greater than a swing range of the data signal; and a driving transistor configured to drive the organic light emitting diode in response to the amplified signal, wherein the amplifying unit comprises:
a first NMOS transistor having a first terminal coupled to an output node of the amplifying unit, a gate terminal coupled to the storage capacitor, and a second terminal coupled to a first voltage source; anda second NMOS transistor having a first terminal coupled to a second voltage source, a gate terminal coupled to the first terminal of the second NMOS transistor, and a second terminal coupled to the output node of the amplifying unit.