Pixel compensating circuit and method of organic light emitting display

摘要

A pixel compensating circuit includes a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a driving transistor, a first capacitor, and an organic light emitting diode element. The first transistor controls transmission of a data signal to a first electrode plate of the first capacitor. The second transistor controls transmission of a reference voltage signal to the first electrode plate of the first capacitor. The driving transistor determines an amount of a driving current. The third transistor controls connection and disconnection between the gate electrode and a drain electrode of the driving transistor. The fourth transistor transmits the driving current from the driving transistor to the organic light emitting diode element. The fifth transistor controls transmission of a supply voltage to the source electrode of the driving transistor; and the organic light emitting diode element emits light in response to the driving current.

主权项

1. A pixel compensating circuit of an organic light emitting display comprising: a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a driving transistor, a first capacitor, and an organic light emitting diode element; wherein:
the first transistor is controlled by a first driving signal to control transmission of a data signal to a first electrode plate of the first capacitor; the second transistor is controlled by a second driving signal to control transmission of a reference voltage signal to the first electrode plate of the first capacitor; the driving transistor is configured to determine a size of driving current which depends on a voltage difference between a gate electrode and a source electrode of the driving transistor; the third transistor is controlled by the first driving signal to control connection and disconnection between the gate electrode and a drain electrode of the driving transistor; the fourth transistor is controlled by a third driving signal to transmit the driving current from the driving transistor to the organic light emitting diode element; the fifth transistor is controlled by a fourth driving signal to control transmission of a supply voltage to the source electrode of the driving transistor; a cathode of the organic light emitting diode element is connected to a low potential, and the organic light emitting diode element is configured to emit light in response to the driving current; and wherein a driving timing of the pixel compensating circuit comprises a node resetting stage, a threshold detecting stage, a data inputting stage and a light emitting stage.