Gate drive for inhibiting drift of a critical voltage

Abstract

The invention is appropriate for the field of gate drive technology, which provides a gate drive for inhibiting drift of a critical voltage, so as to provide a multi-gate signal to a multi-gate line, where the gate drive includes multi-level shift register, where each level shift register includes a pull-up unit, an energy storage unit, a buffer unit, a discharge unit, a pull-down unit, a control unit and a signal switch unit, where the pull-up unit pulls a gate signal up according to a drive control voltage and a first frequency; the buffer unit is used for receiving a input signal; the energy storage unit executes a charging procedure according to an input signal so as to supply a drive control voltage; the discharge unit pulls the drive control voltage down according to a control signal; the pull-down unit pulls a gate signal down according to the control signal; the control unit generates the control signal according to the input signal and a second frequency with opposite phase relative to the first frequency; and the signal switch unit switches the control signal according to the first frequency.

Description

technical field [0001] The invention belongs to the technical field of gate drive circuits, in particular to a gate drive circuit capable of suppressing critical voltage drift. Background technique [0002] A liquid crystal display (Liquid Crystal Display; LCD) is a flat panel display widely used at present, which has the advantages of light and thin appearance, power saving and no radiation. The working principle of the liquid crystal display device is to change the arrangement state of the liquid crystal molecules in the liquid crystal layer by changing the voltage difference between the two ends of the liquid crystal layer, so as to change the light transmittance of the liquid crystal layer, and cooperate with the light source provided by the backlight module to display images. Generally speaking, a liquid crystal display device includes a plurality of pixel units, a gate driving circuit and a source driving circuit. The source driving circuit is used for providing multi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a gate drive circuit that can suppress critical voltage drift, aiming to solve the problem that the existing technology easily leads to critical voltage drift, thereby reducing the reliability and service life of the gate drive circuit

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