PIXEL CIRCUIT AND DRIVING METHOD THEREOF, AND THIN FILM TRANSISTOR BACKBOARD

摘要

There is provided a pixel circuit comprising a driving transistor (DTFT), a signal loading module, a light emitting control module and a storage capacitor (Cs). The pixel circuit can effectively eliminate the non-uniformity due to the threshold voltage of the driving transistor (DTFT) itself and the afterimage phenomenon due to the threshold voltage drift when driving the OLED, avoid the display brightness non-uniformity due to different threshold voltages of the driving transistors (DTFT) between the OLEDs of different pixel units. There is further provided a driving method for the above pixel circuit and a TFT backboard comprising the above pixel circuit.

主权项

1. A pixel circuit comprising a driving transistor, a signal loading module, a light emitting control module and a storage capacitor, wherein
a gate of the driving transistor is connected to a third terminal of the signal loading module and a second terminal of the storage capacitor; a first electrode of the driving transistor is connected to a second terminal of the signal loading module and a second terminal of the light emitting control module; a second electrode of the driving transistor is connected to a fourth terminal of the signal loading module and a third terminal of the light emitting control module; a first terminal of the storage capacitor is connected to a first terminal of the signal loading module and a first terminal of the light emitting control module; a fifth terminal of the signal loading module is configured to receive a data signal; both the first terminal of the light emitting control module and the first terminal of the signal loading module are configured to receive a first voltage signal; and a fourth terminal of the light emitting control module is configured to output a driving voltage signal.