Patent ID: 9691327
Date: 2017-06-27
CPC Classifications: G09G

Claim:
1. A pixel driving circuit, comprising a driving transistor and an organic light emitting diode connected with the driving transistor, wherein the pixel driving circuit further comprises: a first switch transistor, connected with the driving transistor, the first switch transistor being controlled by a first scan signal and further connected with a power supply voltage; a storage capacitor, connected with the driving transistor; a second switch transistor, connected with the storage capacitor, the second switch transistor being controlled by a second scan signal and further connected with a data voltage; a third switch transistor, connected between a common terminal of the driving transistor and the first switch transistor and a common terminal of the driving transistor and the storage capacitor, the third switch transistor being controlled by a third scan signal; and a fourth switch transistor, connected with a common terminal of the driving transistor and the organic light emitting diode, the fourth switch transistor being controlled by the third scan signal and grounded, wherein the first scan signal is the same as the second scan signal, and the first switch transistor and the second switch transistor are connected with a same scan line, when the types of the first switch transistor and the second switch transistor are different.