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White balance adjustment method

An adjustment method and white balance technology, which can be used in cathode ray tube indicators, instruments, color signal processing circuits, etc., and can solve problems such as white field gaps

Active Publication Date: 2013-11-20
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a white balance adjustment method in which the brightness changes exponentially with the gray scale and the chromaticity of the white color point of the full gray scale is fixed to adjust, so as to solve the problem that the existing white balance adjustment method cannot meet the requirements of the full white field. The technical problem that the adjusted white field is different from the expected one caused by the requirement of fixed grayscale chromaticity

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Embodiment Construction

[0045] The following descriptions of the various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the present invention can be practiced.

[0046] The invention relates to a white balance adjustment method, figure 1 Shown is a flow chart of a preferred embodiment of the white balance adjustment method of the present invention, and the white balance adjustment method starts from:

[0047] Step 101, obtain the maximum spectral stimulation value (that is, the spectral stimulation value corresponding to the highest gray scale) of the tested panel on the color coordinate system (such as CIE1931) X max , Y max and Z max , the minimum spectral stimulus value of the tested panel on the color coordinate system (that is, the spectral stimulus value corresponding to the lowest gray scale) X 0 , Y 0 and Z 0 , the spectral stimulus value RX of each gray scale of the red (R) of the tested panel q 、RY q 、RZ q , the spectral stimulus value GX ...

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Abstract

The present invention relates to a white balance adjustment method, comprising: acquiring maximum and minimum spectral tristimulus values, and spectral tristimulus values of grayscales of red, green and blue; calculating an intermediate spectral tristimulus value of Y; fixing a chromatic value and setting a function in which the spectral tristimulus value changes with the grayscales; establishing a polynomial relation between the spectral tristimulus values of the tree colors of the white field and the spectral tristimulus values of the color field; and obtaining the number of grayscales of the three colors in the white field through approximation. In the present invention, the brightness exponentially changes with the grayscales, and the white field is adjusted by fixing the chroma of the white color spots.

Description

technical field [0001] The invention relates to the field of display adjustment, in particular to a white balance adjustment method of a display device. Background technique [0002] Currently existing display devices, such as liquid crystal display devices, plasma display devices, and rear projection display devices, etc., have varying degrees of difference in white field color coordinates due to differences in display principles or hardware design. As for the difference in the white field color coordinates of the display devices, if no corresponding white balance adjustment is performed, the color display effects of different display devices will be quite different. Therefore, white balance tracking correction is usually performed during the production process of the display device, so that the colors displayed by each display device tend to be consistent. [0003] Since the white field spectral stimulus value is mainly affected by the green spectral stimulus value, gener...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/00G09G5/02
CPCH04N9/73G09G5/02G09G2320/0666
Inventor 康志聪
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD