Pixel driving circuit and array substrate of OLED display and the corresponding display

摘要

The present invention discloses a pixel driving circuit of OLED display, which comprises: a scanning transistor TFT1, the source thereof being connected to the data line, the gate thereof being connected to a current row scanning control line, the drain thereof being connected to a first terminal of a storage capacitor C1; a precharging transistor TFT3, the source thereof being connected to the data line, the gate thereof being connected to a previous row scanning control line, and the drain thereof being connected to the first terminal of the storage capacitor C1; a driving transistor TFT2; and an organic light emitting diode; wherein, the scanning time of the current row scanning control line at least partially overlaps that of the previous row scanning control line. The embodiment of the present invention can improve the charging efficiency of the storage capacitor in each pixel unit and then improve the display effects.

主权项

1. A pixel driving circuit of OLED display, comprising:
a scanning transistor TFT1, the source thereof being connected to the data line, the gate thereof being connected to a current row scanning control line, the drain thereof being connected to a first terminal of a storage capacitor C1, and a second terminal of the storage capacitor C1 being grounded; a precharging transistor TFT3, the source thereof being connected to the data line, the gate thereof being connected to a previous row scanning control line, and the drain thereof being connected to the first terminal of the storage capacitor C1; a driving transistor TFT2, the gate thereof being connected to the drain of the scanning transistor TFT1, and the drain thereof being grounded; and an organic light emitting diode, the negative electrode thereof being connected to the source of the driving transistor TFT2, and the positive electrode thereof being connected to a power line Vdd; wherein, the pixel driving circuit is disposed in a pixel unit, and the scanning time of each current row scanning control line and that of the previous row scanning control line have an overlap of ½ pulse width.