A calibration method for color gamut and color gamut coverage

Abstract

The invention provides a calibration device and method for color gamut and color gamut coverage ratios. The device comprises a control center, an integrating sphere light source, a rotatable filter wheel and a color analyzer, wherein the integrating sphere light source and the color analyzer are in communication connection with the control center, and light emitted by the integrating sphere light source enters the color analyzer through the filter wheel. The structural mode of the integrating sphere light source, the rotatable filter wheel and the color analyzer is adopted, synchronous calibration of the color gamut and the color gamut coverage ratios is performed on the output light, special treatment of shading is performed on an output port of the integrating sphere light source, and the influence of stray light on measurement results of the color analyzer is eliminated, so that the monochromaticity and the saturability of the output light are improved, and the accuracy, the stability and the repeatability of calibration of the color gamut and the color gamut coverage ratios are improved.

Description

technical field [0001] The invention relates to the field of processing the color gamut and its coverage, in particular to a calibration method for the color gamut and the coverage of the color. Background technique [0002] At present, the domestic method of measuring the color gamut coverage of color analyzers is to directly calculate the chromaticity coordinates of the vertices of the color gamut triangle, and the color analyzer only calibrates the chromaticity coordinates, and does not calibrate the color gamut. Coverage for direct traceability. When calibrating the chromaticity coordinates of the color analyzer, usually only the color coordinates of the standard A light source are selected for calibration, which does not have good adaptability to the calibration of the color gamut coverage. In the prior art, some improvements have been made to the continuous color grading device with a large color gamut, but due to the high degree of freedom of this type of device, the...

AI Technical Summary

Problems solved by technology

However, it uses multiple sets of integrating sphere light sources and color filters, and adjusts the ratio of luminous flux to achieve a large color gamut of the output light, which leads to the introduction of a large number of uncertain factors to the chromaticity coordinates of the output light of the light source, repeatability and stability. Unable to meet the conditions for use as a metric

There are also lasers used as monochromatic light sources. Lasers have the advantages of stability and good monochromaticity. However, due to the limited output wavelengths of lasers and the high cost, they are not suitable for large-scale applications in the field of color gamut calibration.

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