Pixel driving circuit and method, array substrate, and display apparatus

摘要

A pixel driving circuit and method, an array substrate, and a display apparatus, wherein the pixel driving circuit comprises a data line, a first scan line, a signal control line, a light emitting device, a storage capacitor, a driving transistor and four switching transistors. The pixel driving circuit can avoid the influence on a driving current of an OLED caused by threshold voltage drift of a driving transistor, and improve the uniformity of a displayed image.

主权项

1. A pixel driving circuit, comprising: a data line, a first scan line, a signal control line, a light emitting device, a storage capacitor, a driving transistor, a first switching transistor, a second switching transistor, a third switching transistor, and a fourth switching transistor;
the first switching transistor having a gate connected to the signal control line, a source connected to a first level terminal, and a drain connected to a first terminal of the storage capacitor; a gate of the second switching transistor, a gate of the third switching transistor and a gate of the fourth switching transistor being connected to the first scan line, and being controlled by a same signal from the first scan line; the second switching transistor having a source connected to a low level, and a drain connected to a second terminal of the storage capacitor; the third switching transistor having a source connected to the second terminal of the storage capacitor; the fourth switching transistor having, a source connected to the data line, and a drain connected to a drain of the third switching transistor; the driving transistor having a gate connected to the drain of the fourth switching transistor, and a source connected to the first terminal of the storage capacitor; one terminal of the light emitting device being connected to the drain of the driving transistor, and other terminal being connected to a second level terminal.