Method and device for eliminating residual image

A technology of residual image and voltage, applied to instruments, static indicators, etc., can solve problems such as residual image and display quality degradation

Inactive Publication Date: 2010-06-09
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006]The current design of TFT-LCD is to compensate the asymmetry of the positive and negative display areas caused by the DC voltage ΔVp by adjusting the common electrode voltage, but such adjustment is in TFT-LCD is carried out before leaving the factory, generally only once
Then when the TFT-LCD is used on the client side, due to the long-term display of a fixed screen or in a high-temperature and high-humidity

Method used

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  • Method and device for eliminating residual image
  • Method and device for eliminating residual image
  • Method and device for eliminating residual image

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Embodiment Construction

[0021] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0022] The afterimage elimination method of the present invention includes: providing a periodically changing gray scale reference voltage or a common electrode voltage with a predetermined range for the thin film transistor liquid crystal display through a voltage supply circuit.

[0023] The step of providing the thin film transistor liquid crystal display with a periodically changing grayscale reference voltage or common electrode voltage with a predetermined amplitude through the voltage supply circuit includes: periodically adjusting the grayscale reference voltage or the common electrode voltage by periodically adjusting resistance.

[0024] The TFT liquid crystal display can reduce or eliminate the positive and negative display area relative to the VCOM voltage caused by the deviation between the ideal value of V...

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Abstract

The invention relates to a method and a device for eliminating a residual image. The method comprises the following steps of: providing a gray level reference voltage or a common electrode voltage with the cyclical change in predetermined amplitude for a liquid crystal display through a voltage-supply circuit. The invention also relates to a device for eliminating the residual image. The device comprises a voltage-supply circuit used for supplying the gray level reference voltage or the common electrode voltage with the cyclical change in the predetermined amplitude to a thin film transistor liquid crystal display. The method and the device for eliminating the residual image can decrease or eliminate the asymmetry which occurs in a positive and negative display region relative to the common electrode voltage and is caused by the deviation between the ideal value and the actual value of the common electrode voltage, thereby decreasing or eliminating the direct-current component loaded on a pixel electrode for a long time, and reducing the degree of the residual image of the thin film transistor liquid crystal display.

Description

technical field [0001] The invention relates to a method and a device for eliminating an afterimage, in particular to a method and a device for eliminating an afterimage of a thin film transistor liquid crystal display. Background technique [0002] Among flat-panel displays, liquid crystal displays (LCDs) are widely used in mobile phones, computers, televisions, and personal digital assistants (PDAs) due to their thinness, light weight, low power consumption, and low electromagnetic emission. PDA) and other information devices. [0003] Afterimage is one of the obvious defects of today's LCD. The so-called afterimage means that the LCD displays the same fixed picture for a long time. When the picture is switched to the next picture, the image of the previous picture will be vaguely left. The ions in the panel will move to the upper and lower substrates of the liquid crystal along the direction of the electric field, and gather on the alignment layer. The gathered ions will...

Claims

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Application Information

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IPC IPC(8): G09G3/36
Inventor 窦芳
Owner BOE TECH GRP CO LTD
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