PIXEL DRIVING CIRCUIT AND DISPLAY DEVICE

摘要

The present disclosure provides a pixel driving circuit and a display device, the pixel driving circuit includes: a control unit; a capacitor; a first transistor; a second transistor; a third transistor and a fourth transistor. The present disclosure can effectively compensate the variation of the threshold voltage of the drive thin film transistor by controlling the thin film transistors, thus prevent nonuniform brightness of a screen due to nonuniform current, and extend lifespan of the screen.

主权项

1. A pixel driving circuit, comprising:
a control unit being coupled with a data line, a common power line, a first scan line and a first node, and controlling a voltage of the first node to be a voltage on the data line or a voltage on the common power line by an input signal from the first scan line; a capacitor having a first sustaining electrode coupled with the first node and a second sustaining electrode coupled with a second node; a first transistor having a source coupled with the common power line, a gate coupled with a second scan line, and a drain; a second transistor having a source coupled with a third node, a gate coupled with the second node, and a drain coupled with the drain of the first transistor; a third transistor having a source coupled with the third node, a gate coupled with a first input terminal, and a drain coupled with the second node; and a fourth transistor having a source coupled with the third node, a gate coupled with a second input terminal, and a drain coupled with an anode of a light emitting diode.