Shifting register and driving method thereof, gate driving circuit and display device

Abstract

The invention provides a shift register, which comprises: a pre-charging circuit which is used for pre-charging a pull-up node under the control of an effective signal provided by an input end; a reset circuit which is used for transmitting the signal provided by the first power supply end to the pull-up node under the control of the effective signal provided by the reset end; a first output circuit which is used for transmitting a signal of a clock signal end to a first output end when the pull-up node is at an effective potential; a second output circuit which is used for transmitting the signal of the clock signal end to the second output end when the pull-up node is at the effective potential; and an output control circuit which is used for conducting the first output end and the second output end under the control of the effective signal provided by the output control end. The invention further provides a driving method of the shift register, a gate driving circuit and a display device. According to the invention, poor display caused by threshold drift of the transistor can be reduced.

Description

technical field [0001] The 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] Gate Driver On Array (GOA for short) is a technology for integrating a gate driver circuit on an array substrate. The gate driver circuit includes a plurality of shift registers, and each shift register corresponds to a row of gate lines. [0003] However, in practical applications, since the gate of the thin film transistor in the shift register is subjected to various voltage signals for a long time, the threshold voltage will shift, resulting in attenuation of various signals or even no output. Since the shift registers are cascaded, if there is no output in one stage of the shift register, it will cause abnormal output phenomena such as multi-output (Multi-Output) in the other stage of the shift register, and eventually lead to A variety of display problem...

AI Technical Summary

Problems solved by technology

[0003] However, in practical applications, since the gate of the thin film transistor in the shift register is subjected to various voltage signals for a long time, the threshold voltage will shift, resulting in attenuation of various signals or even no output.

Since the shift registers are cascaded, if there is no output in one stage of the shift register, it will cause abnormal output phenomena such as multi-output (Multi-Output) in the other stage of the shift register, and eventually lead to A variety of display problems, such as horizontal stripes on the screen, screen scanning, etc.

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