Shift register and driving method thereof, grid driving circuit and display device

Abstract

The embodiment of the invention provides a shift register and a driving method thereof, a grid driving circuit and a display device, and relates to the technical field of display. The problem of output abnormity caused by insufficient potential of a control node in the shift register can be prevented. The shift register comprises an input circuit connected with a signal input end; an input circuitcomprising a first input control sub-circuit and a boost sub-circuit. The voltage of the first node is controlled through the voltage of the signal input end. The first input control sub-circuit is configured to output the voltage of a first clock signal end to a pull-up node through a second node under the control of the voltage of a first node, and the voltage of the first node is in negative correlation with the voltage loss of the voltage of the first clock signal end in the process of outputting the voltage to the pull-up node. The boost sub-circuit is connected between the first node and the second node. The boost sub-circuit is configured to boost the voltage of the first node when the voltage of the second node is increased.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a shift register, a driving method thereof, a gate driving circuit, and a display device. Background technique [0002] The gate drive circuit (also known as the scan drive circuit) is an important part of the display device. Each stage of the multi-stage cascaded shift register in the gate drive circuit is connected to a row of gate lines in the display screen. Connection; the function of the gate drive circuit is to sequentially output the switch state voltage of the TFT (Thin Film Transistor, thin film transistor) device line by line, that is, to output the scanning signal to the gate line in the display screen line by line (also called the gate line). signal), so as to turn on multiple TFTs connected to the same gate line in the display screen row by row. When multiple TFTs connected to the gate line in one row are turned on, the pixel voltage is input to the pixel e...

AI Technical Summary

Problems solved by technology

[0003] For the shift register in the above-mentioned gate drive circuit, it is mainly composed of transistors, capacitors and other devices. During the working process of the shift register, the internal control nodes are controlled by the transistors and capacitors, and then the scanning signal is realized. output; however, due to the threshold loss in the process of electrical signal transmission through the transistor, it is easy to cause the voltage of the control node to drop, resulting in abnormal output of the shift register, which in turn leads to abnormal display

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