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

Abstract

The invention provides a shifting register circuit and a drive method, a gate drive circuit and a display device of the shifting register circuit. The shifting register circuit comprises an input control unit, a first node pull-up unit, a first node pull-down unit, a second node pull-up unit, a second node pull-down unit, an output drive unit and an output pull-down unit. When the shifting register circuit works, a second node is pulled upwards or downwards in an alternated mode within the drive time of one grid line, so that the output pull-down unit is opened or closed in an alternated mode and does not work continuously, drifting of the threshold voltage of a thin film transistor in the output pull-down unit can be prevented effectively, electric leakage caused by the drifting of the threshold voltage is reduced, and the overall power dissipation of the gate drive circuit is reduced.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a shift register circuit, a driving method thereof, a gate driving circuit, and a display device. Background technique [0002] TFT-LCD (Thin Film Transistor Liquid Crystal Display, thin film transistor liquid crystal display device) has become the absolute main technology of flat panel display technology due to its advantages of low operating voltage and fast response speed. [0003] The gate drive circuit of TFT-LCD includes a plurality of cascaded shift registers, and each stage of shift register is connected to the corresponding gate line to drive the gate line with the output gate drive signal, so as to realize the step-by-step control of the gate line. line scan driver. The cascading mode of multiple shift registers is as follows: the input end of the current stage shift register is connected to the output end of the upper stage shift register, and the output end ...

AI Technical Summary

Problems solved by technology

Oxide TFT not only has high mobility, stable performance, but also good uniformity, simple and easy process, and low cost, which can well meet the circuit design of high frame scanning frequency, but when the oxide TFT is in the working state for a long time, its Threshold voltage Vth is prone to drift, resulting in increased leakage of TFT and greater power consumption of the gate drive circuit

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