基于CIE1931颜色匹配函数的LED显示设备颜色计算精度研究

Color Calculation Accuracy of LED Display Based on CIE1931 Color Matching Functions

为检验现有色度管理系统中基于CIE19312°颜色匹配函数(CMFs)的颜色计算和校正精度:以3通道(636 nm,524 nm,452 nm)LED发光面板为目标设备,显示CIE推荐的5个颜色(灰、红、黄、绿、蓝);以6通道(672 nm,636 nm,524 nm,508 nm,472 nm,452 nm)LED发光面板为比较设备,产生8种原色光谱组合。基于CIE19312°CMFs进行目标色和比较色的计算、调节,使其具有相近的XYZ色度值,共产生40对颜色。组织了40名色觉正常观察者开展不同观察视角(2.9°和8.6°)下的色差评价实验,共采集到6400组目视色差数据。结果表明:在比较色和目标色为L1同谱组合和L2(仅改变红色通道)组合时,CIE19312°CMFs可满足计算要求;在其他原色组合中,CIE19312°CMFs的计算校正并不适用;且随着观察视角的增加,目视色差差异不显著。

In order to check the accuracy of color calculation and correction based on CIE19312°color matching functions(CMFs)in the existing chromaticity management system,this paper selected an LED panel with three channels(636 nm,524 nm,and 452 nm)as the target device to display five colors(gray,red,yellow,green,and blue)recommended by CIE and took an LED panel with six channels(672 nm,636 nm,524 nm,508 nm,472 nm,and 452 nm)for comparison.In total,there were eight primary sets.Furthermore,the paper calculated and adjusted the target color and compared color by CIE19312°CMFs to make them have similar XYZ chromaticity values,and forty color samples were obtained.In addition,forty observers with normal color vision were organized for color difference evaluation under fields of view(FOV)of 2.9°and 8.6°,respectively,and then 6400 groups of visual color difference data were collected in the experiments.The results indicate that when the compared color and the reference color stimuli are L1(the same as the primary set used in the reference panel)and L2 primary sets(with the shift of red primary),CIE19312°CMFs are applicable for calculation while in other sets,they work poorly.As the FOV increases,the visual color difference from different FOVs is insignificant.