Pixel driving circuit and driving method thereof, array substrate and display device

Abstract

Embodiments of the present invention provide a pixel driving circuit and a driving method thereof, an array substrate and a display device. The pixel driving circuit includes a data writing module, a first control module, a capacitor, a second control module, a compensation module, a driving module and a light emitting device. The data writing module provides the data signal from the data signal terminal to the first node according to the control signal from the control signal terminal. The first control module provides the threshold compensation signal from the compensation module or the initialization signal from the initialization signal terminal to the second node according to the control signal. The capacitor stores a voltage difference between the first node and the second node. The second control module provides the first voltage signal at the first voltage signal terminal to the driving module according to the control signal. The compensation module provides a threshold compensation signal to the first control module. The driving module provides driving current to the light emitting device according to the voltage of the first node and the first voltage signal. The light emitting device emits light according to a driving current.

Description

technical field [0001] The present invention relates to the field of display technology, in particular, to a pixel driving circuit and a driving method thereof, an array substrate and a display device. Background technique [0002] With the advancement of display technology, compared with traditional liquid crystal display (Liquid Crystal Display, LCD) devices, a new generation of organic light emitting diode (Organic Light Emitting Diode, OLED) display devices have lower manufacturing costs and faster response speeds , higher contrast, wider viewing angle, larger operating temperature range, no need for backlight unit, bright colors and thin and light advantages, so OLED display technology has become the fastest growing display technology. [0003] The current mainstream development direction of OLED is to control the magnitude of the current between the source and drain of the driving transistor by changing the gate voltage of the driving transistor that directly drives th...

AI Technical Summary

Problems solved by technology

However, in the process of making the driving transistor, the threshold voltage of the driving transistor at different positions will be different due to the process deviation.

And as the working time delays and the use environment changes, the threshold voltage of the driving transistor will drift

On the other hand, in the display device, the different positions of the pixels will also cause the voltage drop (I-R Drop) of the power supply to be different, which will affect the current driving the OLED.

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