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Brightness coefficient repairing device and method for image display apparatus

A technology of image display equipment and brightness coefficient, applied in static indicators, cathode ray tube indicators, instruments, etc., can solve the problem of impossible to reproduce curves, and achieve the effect of improving gamma correction performance and quality

Inactive Publication Date: 2006-05-10
LEIJIN ELECTRONIC SHENYANG CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

[0009] The nonlinear gamma curve of the liquid crystal display panel, as shown in Figure 2, has two curve intervals, and the gamma correction of the 16-equal function of the traditional technology is almost impossible to reproduce the curve, showing a way to achieve the best picture. qualitative limitations

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  • Brightness coefficient repairing device and method for image display apparatus
  • Brightness coefficient repairing device and method for image display apparatus
  • Brightness coefficient repairing device and method for image display apparatus

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Embodiment Construction

[0024] Hereinafter, embodiments of the device and method for correcting brightness coefficients of an image display device according to the present invention will be described in detail with reference to the accompanying drawings.

[0025] Fig. 3 is a structural block diagram of the brightness coefficient correction device of the image display device of the present invention; Fig. 4 is a flow chart of the brightness coefficient correction method of the image display device of the present invention; Fig. 5 is a gamma correction curve diagram of Fig. 4 . As an embodiment of the luminance coefficient correction device for image display equipment of the present invention, the gamma correction device for LCD rear projection TV, as shown in Figure 3, consists of the following parts: a video display processor 21 is used to display The picture of the image signal; there is a liquid crystal display processor 22, which will utilize the gamma correction data input from the outside to carr...

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Abstract

This invention relates to one image display brightness parameter compensation device and its method, which comprises the following parts: Visual display processor to display image signal picture; LCD processor to gamma correct image signals output by the processor; memory part of the R,G and B searching for memory gamma correction; brightness test part to measure the image brightness; adjusting part to compare the brightness of measure part with set value and using their difference to change the search list. The method comprises the following steps: using gamma correction curve and maximum brightness degree value of the memory part to compute out variable parameters to generate one function; using the function to compute whole brightness gamma correction data to provide it to the control part of processor.

Description

technical field [0001] The invention relates to a brightness coefficient correction device and method of an image display device, in particular to a gamma correction device and method of an image display device. Background technique [0002] Recently, with the rapid expansion of the audio-visual market, the level of consumers who evaluate the quality of video images has greatly improved, and the number of people who can evaluate the finer details of images is gradually expanding. [0003] For this reason, in order to achieve the best picture quality, everyone focuses on the key gamma correction technology, and each company puts great effort into developing its own technology. [0004] The traditional gamma correction, such as the gamma correction of the liquid crystal display panel, as shown in Figure 2, first measures the maximum brightness, then divides it into 16 equal parts, then inputs it into the lookup table, and adopts a linear function correction method . [0005]...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/69G09G5/02
Inventor 孙凉镐
Owner LEIJIN ELECTRONIC SHENYANG CO LTD