| 摘要 |
A pixel circuit, a driving method for driving the pixel circuit and a display device comprising the pixel circuit. The pixel circuit insulates the electric connection between the drain of the driving transistor and the organic light-emitting diode by the insulating transistor when the data is written into the storage capacitor, and the threshold voltage of the driving transistor and the data voltage signal are pre-stored by the storage capacitor, which can compensate the shift in the threshold voltage effectively and in turn can ensure the uniformity and stabilization of the driving current. Additionally, the touch control circuit in the embodiments of the present disclosure multiplexes the scan signal of the pixel circuit, and the coupling capacitor in the touch control circuit is charged through the charging transistor while the storage capacitor is charged, therefore an integration of the touch control circuit into the pixel circuit is achieved perfectly. |
| 主权项 |
1. A pixel circuit comprising an electroluminescent device, a driving transistor, a first switching unit, a compensating unit, an insulating unit, a storage capacitor, and a touch control circuit;
the first switching unit is configured to control writing of a data voltage on a data line, a first terminal of the first switching unit is connected with a first terminal of the storage capacitor, and a second terminal thereof is connected with the data line; a second terminal of the storage capacitor is connected with a gate of the driving transistor and a first terminal of the compensating unit; the compensating unit is configured to pre-store a threshold voltage of the driving transistor into the storage capacitor, and a second terminal of the compensating unit is connected with a drain of the driving transistor; a source of the driving transistor is connected with a power supply terminal, and the drain thereof is connected with a first terminal of the insulation unit; the insulating unit is configured to insulate an electric connection between the driving transistor and the electroluminescent device, and a second terminal of the insulating unit is connected with a first terminal of the electroluminescent device; and a second terminal of the electroluminescent device is connected with a ground terminal; the touch control circuit comprises a charging transistor, a coupling capacitor, a sensing electrode, an amplifying transistor, a third switching transistor, a second scan signal terminal and a sensing line;
a gate of the charging transistor is connected with a third control signal terminal, a source thereof is connected with the second terminal of the storage capacitor, and a drain thereof is connected with a first terminal of the coupling capacitor, the sensing electrode and a gate of the amplifying transistor;a second terminal of the coupling capacitor is connected with a first control signal terminal;a source of the amplifying transistor is connected with the power supply terminal, and a drain thereof is connected with a source of the third switching transistor; and a gate of the third switching transistor is connected with the second scan signal terminal, and a drain thereof is connected with the sensing line. |
