COMPENSATION PIXEL CIRCUIT AND DISPLAY APPARATUS

摘要

There are provided a compensation pixel circuit and a display apparatus. The compensation pixel circuit comprises an organic light emitting diode (D1) and a driving transistor (M1), a first terminal of the driving transistor (M1) being connected to an anode of the organic light emitting diode (D1). The compensation pixel circuit further comprises: a resetting module, a data voltage writing module, a light emitting control module and a switching module. The resetting module includes a capacitor (C1) whose first terminal is connected to a gate of the driving transistor (M1) and configured to make the gate of the driving transistor (M1) discharge so that a gate voltage is reduced to a magnitude of a threshold voltage of the organic light emitting diode (D1). The data voltage writing module is configured to discharge at the gate of the driving transistor (M1) so as to connect a data voltage to a second terminal of the driving transistor (M1) after the gate voltage is made reduced to the magnitude of the threshold voltage of the organic light emitting diode (D). The light emitting control module is configured to connect a source of the driving transistor (M1) and a second terminal of the capacitor (C1) to an operating voltage at a high level after data voltage writing is completed. The switching module is configured to disconnect the driving transistor (M1) from the organic light emitting diode (D1) when the data voltage is connected to the second terminal of the driving transistor (M1). The compensation pixel circuit can compensate for the threshold voltage offset, and reduce the influence of signals from frame to frame greatly.

主权项

1. A compensation pixel circuit comprising an organic light emitting diode and a driving transistor, a first terminal of the driving transistor being connected to an anode of the organic light emitting diode, wherein the compensation pixel circuit further comprises:
a resetting module including a capacitor whose first terminal is connected to a gate of the driving transistor and configured to make the gate of the driving transistor discharge so that a gate voltage is reduced to a magnitude of a threshold voltage of the organic light emitting diode; a data voltage writing module configured to discharge at the gate of the driving transistor so as to connect a data voltage to a second terminal of the driving transistor after the gate voltage is made reduced to the magnitude of the threshold voltage of the organic light emitting diode; a light emitting control module configured to connect a source of the driving transistor and a second terminal of the capacitor to an operating voltage at a high level after data voltage writing is completed; and a switching module configured to disconnect the driving transistor from the organic light emitting diode when the data voltage is connected to the second terminal of the driving transistor; wherein the first terminal of the driving transistor is connected to the anode of the organic light emitting diode via the switching module, the switching module is further configured to connect the driving transistor to the organic light emitting diode when it is discharged at the gate of the driving transistor, and the first terminal of the driving transistor is a drain, and the second terminal of the driving transistor is a source.