Liquid crystal display and method for eliminating afterimage thereof

A liquid crystal display, discharger technology, applied in static indicators, instruments, nonlinear optics, etc., can solve problems such as afterimage retention

Inactive Publication Date: 2008-07-09
SAMSUNG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, afterimages ma

Method used

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  • Liquid crystal display and method for eliminating afterimage thereof
  • Liquid crystal display and method for eliminating afterimage thereof
  • Liquid crystal display and method for eliminating afterimage thereof

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[0020] When the power supplied to a conventional LCD is cut off, afterimages are left on the liquid crystal panel. According to the present invention, it is determined that when the power supply suddenly stops (such as removing the battery) in the conventional LCD, all the gate lines except the gate line selected just before removing the battery are in the gate cut-off voltage state, and the accumulated The gray scale voltage in the pixel capacitor of the liquid crystal panel is kept as it is. That is, except for the gate line that was selected just before the battery is removed, the path through which the gray voltage accumulated in the pixel capacitor may be discharged is cut off, and thus the gray voltage is maintained and left as an afterimage, Until all the grayscale voltages are naturally discharged through the leakage current.

[0021] However, it was also determined according to the present invention that TFTs formed in liquid crystal panels in conventional LCDs may h...

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Abstract

A liquid crystal display (''LCD'') for eliminating an afterimage includes a power supply, a gate driver and a discharger. The power supply detects the cutting off of external power voltage and supplies a discharge signal. The gate driver simultaneously supplies a gate driving signal to a plurality of gate lines in response to the discharge signal, and the discharger supplies a common voltage to aplurality of data lines in response to the discharge signal.

Description

technical field [0001] The present invention relates to a liquid crystal display ("LCD") and method thereof for eliminating afterimages, and more particularly, to an LCD and method for eliminating afterimages when an external power source is cut off. Background technique [0002] The LCD displays images using the light transmittance of liquid crystals interposed between a first substrate and a second substrate whose light transmits when a voltage is applied to electrodes of the two substrates facing each other to generate an electric field. The transmittance changes. [0003] With the development of features such as small size, light weight, low power consumption and high reliability, LCDs are widely used in mobile devices that people demand rapidly, such as personal digital assistants ("PDA"), mobile phones and notebooks. type computer etc. [0004] When the battery of the LCD of the mobile device is removed by a user or external influence to stop its operation, the power...

Claims

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Application Information

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IPC IPC(8): G09G3/36G09G3/20G02F1/133
CPCG02F1/136286G09G3/3648G09G3/3696G09G2300/0426G09G2320/0257G02F1/133397
Inventor 朱胜镛李重先郑锡祺李东烨金哲民朴泰炯朴俊河尹汝珍俞相旭
Owner SAMSUNG DISPLAY CO LTD
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