Active matrix organic light-emitting diode (AMOLED) pixel driving circuit, array substrate and display apparatus
A pixel driving circuit, an array substrate and a display apparatus, the pixel driving circuit includes a driving transistor and an organic light-emitting diode, it further comprises: a charging compensation module, for receiving a data voltage signal, charging the driving transistor and compensating for a threshold voltage of the driving transistor, under the control of a scan voltage signal; and a light-emitting control module, for receiving a reference voltage and a power supply voltage, and controlling the organic light-emitting diode to emit lights, under the control of a light-emitting control signal. The problem of the non-uniformity of threshold voltages is eliminated by compensating for the threshold voltages of driving transistors thereby enhancing the display effect of the display apparatus.
1. A pixel driving circuit comprising a driving transistor and an organic light-emitting diode, consisting essentially of:
a charging compensation module for receiving a data voltage signal, charging the driving transistor and compensating for a threshold voltage of the driving transistor, under the control of a scan voltage signal; and
a light-emitting control module for receiving a reference voltage and a power supply voltage, and controlling the organic light-emitting diode to emit lights, under the control of a light-emitting control signal,
the scan voltage signal and the light-emitting control signal are input differentially; during a first stage, the scan voltage signal is at a high level and the light-emitting control signal is at a low level; and during a second stage, the scan voltage signal is at the low level and the light-emitting control signal is at the high level, the first stage T 1 and the second stage T 2 make up one display frame period of the pixel driving circuit,
wherein the charging compensation module comprises:
a first capacitor, the first terminal thereof is connected with the gate of the driving transistor;
a second transistor, the gate thereof is connected with the scan voltage signal, the source thereof is connected with a second terminal of the first capacitor, and the drain thereof is connected with the data voltage signal; and
a fifth transistor, the gate thereof is connected with the scan voltage signal, the source thereof is connected with the gate of the driving transistor, and the drain thereof is connected with the drain of the driving transistor, and
the light-emitting control module comprises:
a third transistor, the gate thereof is connected with the light-emitting control signal, the source thereof is connected with the drain of the driving transistor, and the drain thereof is directly connected with the power supply voltage; and
a fourth transistor, the gate thereof is connected with the light-emitting control signal, the source thereof is connected with the second terminal of the first capacitor, and the drain thereof is connected with the reference voltage.
2. The pixel driving circuit of claim 1 , wherein the driving transistor is a N-type transistors.
3. The pixel driving circuit of claim 1 , wherein the driving transistor and the second transistor are N-type transistors.
4. The pixel driving circuit of claim 1 , wherein the driving transistor, the second transistor, the third transistor and the fourth transistor are N-type transistors.
5. The pixel driving circuit of claim 1 , wherein the driving transistor, the second transistor, the third transistor, the fourth transistor and the fifth transistor are N-type transistors.
6. An array substrate comprising the pixel driving circuit of claim 1 .
7. The array substrate of claim 6 , wherein the driving transistor, the second transistor, the third transistor, the fourth transistor and the fifth transistor are N-type transistors.
8. A display apparatus comprising the array substrate of claim 6 .