Pixel driving circuit and control method thereof, display panel and display apparatus

Abstract

The invention provides a pixel driving circuit and a control method thereof, a display panel and a display apparatus, relating to the technical field of display and reducing the drifting probability of the threshold voltage of the driving transistor to thereby improve the display defect caused by the drifting probability. The pixel driving circuit includes a first transistor for transmitting the signal of a first power voltage end to a first node in response to the enable signal of a light-emitting signal control end; a first driving transistor for generating the driving current on the conducting path from the first node to a third node according to the enable signal of a second node, the first driving transistor being an N-type transistor; a second driving transistor for generating the driving current on the conducting path from the first node to the third node according to the enable signal of the second node, the second driving transistor being a P-type transistor; and a second transistor for transmitting the signal of a polarity switching signal end to the second node in response to the enable signal of a first scanning signal end.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel driving circuit and a control method thereof, a display panel and a display device. Background technique [0002] In the organic light emitting display panel, a pixel driving circuit corresponding to each light emitting device is provided for driving the light emitting device to emit light. [0003] like figure 1 and figure 2 shown, figure 1 It is a schematic circuit diagram of a pixel driving circuit in the prior art, figure 2 for figure 1 The timing signal diagram corresponding to the pixel driving circuit in the middle, the pixel driving circuit includes the first thin film transistor T1, the second thin film transistor T2, the third thin film transistor T3, the driving transistor Td, the storage capacitor Cst and the light emitting element E, the first power supply voltage terminal Vdd is used to provide the first power supply voltage, the second power...

AI Technical Summary

Problems solved by technology

However, this is only to offset the influence of the threshold voltage Vth in theory, and the actual driving current is still related to the threshold voltage Vth to a certain extent. Polar voltage influence makes its threshold voltage Vth continue to drift in the same direction, resulting in poor display

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