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Power-off ghosting elimination control circuit and control method thereof and liquid crystal display device

A technology for controlling circuits and after-image after power-off, applied to static indicators, instruments, etc., can solve problems such as liquid crystal display residue, insufficient discharge, and insufficient TFT opening, so as to avoid the phenomenon of residual charge, prolong the opening time, and improve The effect of eliminating the effect

Active Publication Date: 2018-07-06
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a control circuit for eliminating after-image after shutdown, its control method, and a liquid crystal display device, which are used to solve the problem of insufficient discharge due to insufficient TFT opening in the prior art, resulting in residual charges in the liquid crystal display, affecting Shutdown afterimage removal effect problem

Method used

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  • Power-off ghosting elimination control circuit and control method thereof and liquid crystal display device

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Embodiment Construction

[0041] In order to make the object, technical solution and advantages of the present invention clearer, the specific implementations of the control circuit for eliminating power-off afterimage provided by the embodiment of the present invention, its control method and the liquid crystal display device will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, not to limit the present invention. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0042] The size and shape of each figure in the accompanying drawings does not reflect the true proportion of the control circuit for eliminating afterimage after shutdown, and the purpose is only to schematically illustrate the content of the present invention.

[0043] Currently, if figure...

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Abstract

The invention discloses a power-off ghosting elimination control circuit and a control method thereof and a liquid crystal display device. After voltage rectification and voltage division through a rectification and voltage division module, switch control signals are outputted; when an alternating-current power supply is in power failure, voltage of the switch control signals is reduced to be notlarger than preset voltage, and a voltage division control module is controlled to output first-level discharge control signals; in power supply through the alternating-current power supply, the voltage of the switch control signals is increased to be larger than the preset voltage, and the voltage division control module is controlled to output second-level discharge control signals; only under the control of the first-level discharge control signals, a level switch module outputs gate-on signals to all TFT gates in a liquid crystal display panel to control on of TFTs. Therefore, by detectionof voltage of the alternating-current power supply after rectification and voltage division, all TFTs in a liquid crystal display panel can be turned on when the alternating-current power supply is in power failure, and power-off ghosting elimination effects are improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a control circuit for eliminating residual image after shutdown, a control method thereof and a liquid crystal display device. Background technique [0002] A liquid crystal display (Liquid Crystal Display, LCD) has been applied to electronic devices including computers, mobile phones, and televisions. A liquid crystal display generally includes an array substrate and a color filter substrate disposed opposite to each other, and a liquid crystal layer disposed between the array substrate and the color filter substrate. When the LCD is displaying, the deflection of the liquid crystal molecules is controlled by applying voltages to the pixel electrodes on the array substrate and the common electrodes on the color filter substrate respectively. However, when the LCD is turned off, the charge stored in the LCD cannot be effectively released, leaving a residual image, which leads to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/3696G09G2320/0257
Inventor 董兴张智唐秀珠陈帅熊丽军赵敬鹏梁雪波梁鹏
Owner BOE TECH GRP CO LTD
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