Patent ID: 9514680
Filing Date: 2016-12-06
CPC Classification: G09G

Claim Text:
1. A pixel driving circuit, comprising: a light emitting diode, comprising a first terminal and a second terminal; a data writing unit, configured to receive a data signal; a first transistor, comprising a gate, a first terminal and a second terminal, wherein the gate of the first transistor is electrically coupled to the data writing unit, the first transistor is configured to determine a current flowing through from the first terminal to the second terminal of the light emitting diode according to a voltage difference between the gate and the first terminal of the first transistor; a first compensation unit, electrically coupled to the first transistor and configured to, with a cooperation of the first transistor, provide a current path from the gate of the first transistor to a first voltage source and a current path from the gate of the first transistor to a second voltage source; a second compensation unit, comprising a first capacitor electrically coupled to the gate of the first transistor, wherein the second compensation unit is configured to provide a voltage transition to the gate of the first transistor through a voltage coupling of the first capacitor, and the voltage transition is substantially equal to a voltage difference between the first terminal and the second terminal of the light emitting diode; and a second transistor, electrically coupled between the first voltage source and the second voltage source, wherein the second transistor is configured to turn on/off the current path between the first voltage source and the second voltage source.