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Virtual expansion method of laser television color gamut based on 1931CIE (Coherent Infrared Energy)-XYZ system

A technology of laser TV and expansion method, which is applied in the field of virtual expansion of laser TV color gamut, can solve the problems such as the inability to fully utilize the laser display system.

Inactive Publication Date: 2010-07-28
SHANDONG UNIV
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Problems solved by technology

Therefore, the use of lasers to achieve color display has aroused great interest, but because both NTSC and PAL signals are based on phosphor powder display, that is to say, laser display uses ordinary color reproduction technology for display, which can only be displayed. Reproduce the color in the fluorescent pink gamut, and cannot give full play to the advantages of the laser display system with a larger color gamut and higher saturation

Method used

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  • Virtual expansion method of laser television color gamut based on 1931CIE (Coherent Infrared Energy)-XYZ system
  • Virtual expansion method of laser television color gamut based on 1931CIE (Coherent Infrared Energy)-XYZ system
  • Virtual expansion method of laser television color gamut based on 1931CIE (Coherent Infrared Energy)-XYZ system

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Embodiment 1

[0126] The specific process of step 1 is

[0127] R, G, and B are in the range of 0 to 255, and the interval is 16, and 17 data are obtained, and R, G, and B are regarded as an array, and 17 can be obtained 3 sampling points. According to the principle of chromaticity, according to the conversion matrix from the 1931CIE-RGB system to the 1931CIE-XYZ system under the NTSC system:

[0128] X=0.607*R+0.1734*G+0.2006*B;

[0129] Y=0.299*R+0.5864*G+0.1146*B;

[0130] Z=0.0661*G+1.1175*B;

[0131] Perform coordinate transformation to obtain the coordinates XYZ under the 1931CIE-XYZ system. According to the formula:

[0132] x=X / (X+Y+Z);

[0133] y=Y / (X+Y+Z)

[0134] z=Z / (X+Y+Z)

[0135] Get the corresponding 17 under the 1931CIE-XYZ system 3 points.

[0136] The specific process of step 2 is

[0137] Three laser sources with wavelengths of 640nm (red), 532nm (green) and 447nm (blue) are used, and D65 is used as the reference white light.

[0138] According to the princip...

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Abstract

The invention relates to a virtual expansion method of laser television color gamut based on a 1931CIE (Coherent Infrared Energy)-XYZ system. The invention has the advantages that the features of laser large color gamut and high saturation are fully utilized so that the expression color of television images is enriched, the images presented are more graduated and more close to the true color of the nature, and the like. The method comprises the following steps: step 1. performing coordinate transformation under the 1931CIE-RGB system to obtain a coordinate under the CIE1931 color space; step 2. performing laser display matrix transformation; step 3, solving a virtual expansion factor; step 4, expanding equal tone; and step 5, establishing a three-dimensional lookup table to obtain virtual expansion numerical value to be output according to RGB value for inputting television signals by a cube interpolation algorithm method so as to realize virtual expansion finally.

Description

technical field [0001] The invention relates to a virtual extension method of laser TV color gamut based on 1931CIE-XYZ system. Background technique [0002] Laser display technology uses red, green, and blue all-solid-state lasers as the three primary colors, and modulates the three-color lasers through input signals to achieve the purpose of displaying video images on the screen. Due to the good monochromaticity and high color purity of laser, laser display technology has the advantages of large color gamut, high brightness and high saturation compared with other display technologies, and can reflect natural colors more realistically and naturally. [0003] In recent years, the technology of all-solid-state lasers has made rapid progress, and red, green, and blue DPL (diode pump laser) all-solid-state lasers with small size and high power above the watt level have been developed successively, which laid the foundation for the development of laser video display . Due to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/64
Inventor 宋刚邱天星王洪君万强刘英李义辉
Owner SHANDONG UNIV
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