Pixel driving circuit, driving method thereof and display device

Abstract

The invention discloses a pixel driving circuit, a driving method thereof and a display device, relates to the technical field of display, and aims to solve the problem that the display quality of thedisplay device is affected due to the fact that electrical parameters for driving a thin film transistor are different and part of the electrical parameters drift to different degrees along with theprolonging of the display time of the display device. The pixel driving circuit comprises a driving sub-circuit, an energy storage sub-circuit, a data write-in sub-circuit and a compensation sub-circuit, the data write-in sub-circuit is used for controlling coupling between the conduction current data signal input end and the first end of the driving sub-circuit under the control of the first scanning signal input end in a write-in compensation period; and the compensation sub-circuit is used for controlling the coupling between the first end of the conduction driving sub-circuit and the control end of the driving sub-circuit under the control of the first scanning signal input end in the write-in compensation time period. The pixel driving circuit provided by the invention is used for driving the light-emitting element to emit light.

Description

technical field [0001] The present invention relates to the field of display technology, and in particular, to a pixel driving circuit, a driving method thereof, and a display device. Background technique [0002] An OLED (Organic Light-Emitting Diode, organic light-emitting diode) display device has many advantages, such as self-luminescence, ultra-thinness, fast response speed, high contrast ratio, and wide viewing angle, and is currently a display device that has received widespread attention. As the size of OLED display devices gradually increases, when manufacturing large-sized OLED display devices, due to the limitations of the preparation process and materials, the electrical parameters such as threshold voltage and mobility of the driving thin film transistors in each area of ​​the display device are different. , this difference will be converted into current difference and brightness difference of the OLED display device, resulting in uneven display brightness of th...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a pixel driving circuit, its driving method, and a display device, which are used to solve the problem that due to differences in the electrical parameters of the driving thin film transistors, and with the prolongation of the display time of the display device, some electrical parameters drift to different degrees , resulting in problems that affect the display quality of the display device

Images