Gate drive circuit

A gate drive circuit and gate technology, applied in the direction of instruments, static indicators, etc., can solve the problems of afterimage, LCD screen pixel capacitance residual level, etc., and achieve the effect of avoiding afterimage

Active Publication Date: 2018-03-02
WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual use, after the liquid crystal display is powered off, the liquid crystal screen may have residual voltage in the pixel capacitor, which will cause image sticking
In the prior art, there is no effective mechanism to prevent this phenomenon

Method used

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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] It should be noted that the terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a", "said" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" a...

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Abstract

The embodiment of the invention discloses a gate drive circuit comprising a pull-up control module which is used for generating a first control signal in case of power outage; a pull-up output modulewhich is used for outputting high level under the control of the first control signal; a pull-down control module which is used for generating a second control signal in case of power outage; and a pull-down output module which is used for outputting low level under the control of the second control signal, wherein the output end of the pull-up output module and the output end of the pull-down output module are connected with the output end of the Nth gate drive unit, and the output end of the Nth gate drive unit is enabled to output high level by the pull-up output module and the pull-down output module in case of power outage. The image on the screen can be quickly cleared in case of sudden power outage in the use process of the liquid crystal screen so that appearance of the ghost shadow of the previous display frame on the displayer can be avoided.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a gate driving circuit. Background technique [0002] Thin film transistor liquid crystal display (Thin film transistor liquid crystal display, TFT-LCD) has become the mainstream display in the market. The basic principle is that the liquid crystal in the display is deflected under the drive of voltage, changing the direction of light propagation so that the display shows different color. The gate driver on array (Gate Driver OnArray, GOA) circuit is a technology that integrates the gate driver circuit on the array substrate of the liquid crystal display panel to realize the progressive scanning of the gate lines. In actual use, after the liquid crystal display is powered off, the liquid crystal screen may have residual voltage in the pixel capacitance, which will cause image sticking. In the prior art, there is no effective mechanism to prevent this phenomenon. Cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/3674G09G2330/027G09G2310/0286G09G3/3677G09G2310/0283G09G2354/00
Inventor 肖军城戴荣磊
Owner WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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