Patent ID: 9501973
Filing Date: 2016-11-22
CPC Classification: G09G

Claim Text:
1. A pixel driving circuit, comprising: a data line for providing a data voltage; a gate line for providing a scanning voltage; a first power supply line for providing a first power supply voltage; a second power supply line for providing a second power supply voltage; a light emitting device connected to the second power supply line; a driving transistor connected to the first power supply line; a storage capacitor having a first terminal connected to a gate of the driving transistor and configured to transfer information including the data voltage to the gate of the driving transistor; a resetting unit connected to the first power supply line and the storage capacitor and configured to reset a voltage across the storage capacitor as a predetermined signal voltage; a data writing unit connected to the gate line, the data line and a second terminal of the storage capacitor and configured to write the information including the data voltage into the second terminal of the storage capacitor; a compensating unit connected to the gate line, the first terminal of the storage capacitor and the driving transistor and configured to write information including a threshold voltage of the driving transistor and information of the first power supply voltage into the first terminal of the storage capacitor; and a light emitting control unit connected to the first power supply line, the second terminal of the storage capacitor, the driving transistor and light emitting device and configured to write the first power supply voltage into the second terminal of the storage capacitor and control the driving transistor to drive the light emitting device to emit light, wherein the driving transistor is configured to control a current flowing into the light emitting device according to information including the data voltage, the threshold voltage of the driving transistor and the first power supply voltage under a control of the light emitting control unit.