Grid electrode drive circuit and display device thereof

Abstract

The invention discloses a grid electrode drive circuit. The grid electrode drive circuit comprises multiple stages of grid electrode drive units. Each stage of grid electrode drive unit comprises a pre-charging module, a pull-up module, a pull-down module and a resetting module. Each stage of grid electrode drive unit receives a first time sequence signal, a second time sequence signal, a next stage of grid electrode drive signal output to the next stage of grid electrode drive unit, a former stage of grid electrode drive signal output to the former stage of grid electrode drive unit and a resetting signal. The invention further provides a display device. The resetting modules in grid electrode drive circuit and the display device enable the grid electrode drive signal of each stage of grid electrode drive unit to output high potential simultaneously when the resetting signals are high potentials, thereby discharging accumulated electricity loads in a liquid crystal capacitor soon and further eliminating shut-down residual images.

Description

technical field [0001] The present invention relates to the technical field of liquid crystal display, in particular to a gate driving circuit and a display device thereof. Background technique [0002] As liquid crystal displays are more and more applied to people's lives, various problems arising in the process of liquid crystal display also need to be solved urgently. Among them, shutdown afterimage is a major problem in the process of liquid crystal display. Liquid crystal displays generally store charges through storage capacitors and liquid crystal capacitors, so that the picture can be maintained to the next new picture. However, when the TFT liquid crystal display is powered off, due to the charging relationship, after the display displays images for a long time, charges will accumulate in the liquid crystal capacitor, and these charges cannot be released immediately after the power is turned off. A portion of the previous image will remain on the screen at the mom...

AI Technical Summary

Problems solved by technology

However, when the thin film transistor liquid crystal display is powered off, due to the charging relationship, after the display has displayed images for a long time, it will cause charge accumulation in the liquid crystal capacitor, and these charges cannot be released immediately after the power is turned off, so when the power is turned off part of the previous image will remain on the momentary screen

[0003] However, in the existing gate drive circuit, the gate drive signal of each stage is controlled by the external clock signal and the gate drive signal fed back from the front and rear stages, which leads to all the gates being from top to bottom, or from bottom to top Turning on sequentially, there is no way to realize that all the gates are opened at the same time at the same time, and the liquid crystal capacitors in the liquid crystal display cannot be discharged at the same time. circuit to eliminate shutdown afterimage

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