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Method and device for improving image retention of thin film transistor LCD

A liquid crystal display, thin film transistor technology, used in static indicators, instruments, nonlinear optics, etc., can solve problems such as afterimages

Inactive Publication Date: 2009-03-11
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the LCD panel displays a fixed picture for a long time or is in a high-temperature and high-humidity environment, the DC component ΔVp on the panel will change, so that there is a deviation between the actual adjusted VCOM value and the ideal VCOM value of the panel. This deviation is always When the DC component is loaded on the LCD panel for a long time, afterimages will occur

Method used

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  • Method and device for improving image retention of thin film transistor LCD
  • Method and device for improving image retention of thin film transistor LCD
  • Method and device for improving image retention of thin film transistor LCD

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Embodiment Construction

[0034] image 3 It is the structural schematic diagram of the specific embodiment 1 of the device for improving the afterimage of the thin film transistor liquid crystal display (TFT-LCD) of the present invention, including:

[0035] a first common electrode voltage regulator 6, configured to generate a first common electrode voltage;

[0036] Timing controller 8, used for generating rectangular pulse sequence and reverse control signal;

[0037] The inverter 9 is connected to the timing controller 8, and is used to generate a control signal with a forward pulse and a reverse pulse from the rectangular pulse sequence and the reverse control signal;

[0038] The second common electrode voltage regulator 7 is connected to the first common electrode voltage regulator 6 and the inverter 9, and is used to process the first common electrode voltage according to the control signal to generate the second common electrode loaded with a sinusoidal AC component Voltage.

[0039] The d...

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Abstract

The invention relates to a method for improving the after images of a thin-film transistor liquid crystal display (LCD) and a device thereof. AC components are loaded on a DC common electrode voltage, namely sine wave with slow change and comparatively small amplitude, which results in that the common electrode voltage slowly and slightly swings with the change of time when the thin-film transistor LCD is used, thus reducing or eliminating the effect of generating after images caused by that the deviation voltage is loaded on a pixel electrode for a long time due to deviation between an ideal value and an actual value of the common electrode voltage, and mitigating the after images.

Description

technical field [0001] The invention relates to a control method and a control device of a thin film transistor liquid crystal display device, in particular to a method and a device for improving afterimages of a thin film transistor liquid crystal display (TFT-LCD). Background technique [0002] Under the structure of the common electrode voltage (VCOM) of the thin film transistor liquid crystal display (TFT-LCD) commonly used at present, when the voltage on the gate line changes, the voltage occurs through the parasitic capacitance between the gate line and the pixel electrode. The change affects the correctness of the voltage on the pixel electrode, so that a DC component is applied to the pixel electrode. Due to the characteristics of liquid crystal molecules, after a TFT-LCD drives a specific still image for a long time, the DC component is loaded on the pixel electrode for a long time, and when it is converted to another image, the original image will remain, resulting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1362G02F1/133G09G3/36G09G3/20
Inventor 窦芳
Owner BOE TECH GRP CO LTD
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