Pixel driving circuit, restoration method thereof and display device

Abstract

The invention provides a pixel driving circuit, a restoration method thereof, and a display device wherein the pixel driving circuit comprises a first film transistor, a second film transistor, a third film transistor, a fourth film transistor, a fifth film transistor, a capacitor, a first electroluminescent device and a second electroluminescent device. According to the invention, the fourth and fifth film transistors are alternately opened by light emission control signals and the first electroluminescent device and the second electroluminescent device alternately emit light, thereby reducing the duration of the continuous operation of the first electroluminescent device and the second electroluminescent device, increasing the service life of the first electroluminescent device and the second electroluminescent device, and enabling that when either the first electroluminescent device or the second electroluminescent device fails, the other one can still continue to work through the adjustment of the electrical potential of the light emission control signals so as to ensure that the pixels radiate light normally.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a pixel driving circuit, a repair method thereof, and a display device. Background technique [0002] With the development of display technology, self-illuminating display devices using electroluminescent devices such as organic light-emitting diodes (Organic Light Emitting Display, OLED) or quantum dots light-emitting diodes (Quantum dots Light-emitting Diodes, QLED) as light sources are becoming more and more Popular with consumers, it has many advantages such as high luminous efficiency, short response time, high definition and contrast, nearly 180° viewing angle, wide operating temperature range, flexible display and large-area full-color display. [0003] Both OLED and QLED are current-driven electroluminescent devices. When a current flows through the OLED or QLED, the OLED or QLED emits light, and the brightness of the light is determined by the current flowing through th...

AI Technical Summary

Problems solved by technology

[0005] In the display device using the above-mentioned pixel drive circuit, the electroluminescent device is always in a light-emitting state during use, which will accelerate the aging of the electroluminescent device, shorten the service life of the electroluminescent device, and when the electroluminescent device is damaged , the lack of an effective repair method, resulting in the failure of the pixel to emit light after the damage of the electroluminescent device, resulting in a decrease in picture quality and dark spots

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