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Method for driving thin film liquid crystal display

A technology of a liquid crystal display and a driving method, which is applied in the field of thin film liquid crystal display driving, and can solve the problem of inability to handle tolerance voltage and the like

Inactive Publication Date: 2009-06-03
CHUNGHWA PICTURE TUBES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the problem faced by overdrive is the same as that of overdrive, it cannot handle the highest and lowest tolerance voltage

Method used

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  • Method for driving thin film liquid crystal display
  • Method for driving thin film liquid crystal display
  • Method for driving thin film liquid crystal display

Examples

Experimental program
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Effect test

Embodiment Construction

[0046] The sub-pixel circuit of this embodiment and figure 1 Similarly, the driving circuit of the thin film liquid crystal display is as follows Figure 4 As shown, it includes a TFT LCD panel 301 , a timing controller 402 , a query unit 403 , a gamma circuit 304 , a source driving circuit 305 , a gate driving circuit 306 , and a common voltage circuit 407 . Figure 4 and image 3 The main difference is that the common voltage circuit 407 is added. Because the common voltage in this embodiment must swing up and down according to the driving polarity of the sub-pixels, this common voltage comes from the common voltage circuit 407 . In addition, the timing controller 402 and the query unit 403 are also modified, and relevant details will be described later.

[0047] Next please refer to Figure 5 , Figure 5 is the driving bias V of a certain sub-pixel in positive polarity driving B . The so-called driving bias refers to the source line voltage V on the source line SL S...

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PUM

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Abstract

A driving method of film liquid crystal display includes lowering common voltage and raising voltage of source electrode line if this time of pixel is positive-polarity driving when data at certain time of pixel is changed and raising common voltage as well as lowering voltage of source electrode line if this time of pixel is negative-polarity driving.

Description

technical field [0001] The present invention relates to a thin film transistor liquid crystal display (referred to as TFT LCD) driving method, and in particular to a common voltage (common voltage) for changing the driving polarity of a sub-pixel (or called dot). ) driving method of thin film liquid crystal display. Background technique [0002] The image of a thin film liquid crystal display is composed of colors displayed by many pixels, and each pixel is usually divided into three sub-pixels of red, green and blue. figure 1 It is a schematic circuit diagram of a sub-pixel of a typical thin-film liquid crystal display. In the traditional driving method, the gate line (gate line) GL gives the thin film transistor TFT a turn-on signal period, and in this period, the source line (source line) SL sends the data voltage to the storage capacitor Cs in the sub-pixel. and liquid crystal capacitance C LC charge to determine the brightness of the sub-pixel. [0003] Recently, si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/20G02F1/133
Inventor 郑戎杰
Owner CHUNGHWA PICTURE TUBES LTD