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Gamma correction device and method for liquid crystal display

A gamma correction, liquid crystal technology, applied to static indicators, instruments, etc., can solve problems such as color drift of liquid crystal screens

Inactive Publication Date: 2011-12-07
HIMAX TECH LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0012] Therefore, the object of the present invention is to provide a gamma correction device and method, so that the effect of gamma correction is not affected by the color displayed by the pixel and the distance between the upper plate and the lower plate, so as to solve the problem of color drift of the liquid crystal screen, and Improving the image quality of LCD screen

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  • Gamma correction device and method for liquid crystal display

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Embodiment Construction

[0040] The present invention is characterized in that the entire liquid crystal screen is divided into multiple screen blocks. When gamma correction is performed, gamma correction is performed according to the color displayed by the pixel corresponding to each pixel data and the screen block to which the pixel belongs.

[0041]The idea of ​​the present invention is to divide the entire liquid crystal screen into multiple screen blocks and perform gamma correction respectively. In this embodiment, the resolution is 1024×768 (that is, there are 768 pixel rows on the liquid crystal screen, and each pixel row has 1024 display units, and each display unit has three pixels, which display red, blue and green respectively. ) color LCD screen as an example, the entire LCD screen is divided into a total of 192 screen blocks of 16×12. Compared with the whole LCD screen, in each screen block, the distance between the upper panel and the lower panel of pixels is not much different, so the...

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Abstract

A gamma correction device for a liquid crystal display at least includes a reference voltage generation circuit and a gamma correction circuit. Wherein, the reference voltage generation circuit is used to output multiple corresponding reference voltages according to the pixel data. The gamma correction circuit is used for performing gamma correction on the pixel data according to the reference voltage. The feature of the present invention is that the reference voltage generating circuit performs gamma correction on the pixel data according to the position of the pixel corresponding to the pixel data on the liquid crystal screen and the reference voltage corresponding to the color displayed by the pixel.

Description

[0001] This application is a divisional application of the following patent application: the filing date is January 17, 2002, the application number is 02102022.1, and the title of the invention is "Gamma Correction Device and Method for Liquid Crystal Display". technical field [0002] The present invention relates to a digital-to-analog signal conversion device and method, in particular to a gamma (γ) (Gamma) correction device and method for a liquid crystal display. Background technique [0003] Due to the advantages of thin volume, light weight and low electromagnetic radiation, liquid crystal displays (LCDs) have been widely used in recent years. [0004] The LCD screen has a plurality of pixels arranged in a matrix. Each pixel is composed of an upper plate, a lower plate and a liquid crystal layer between the upper plate and the lower plate. A plurality of liquid crystal molecules are filled in the cavity between the upper plate and the lower plate to form a liquid cr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G02F1/133
Inventor 卜令楷
Owner HIMAX TECH LTD
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