不同色温环境光下彩色电润湿电子纸的色彩校正

Color correction of color electrowetting display under ambient light with different color temperatures

针对反射式显示器彩色电润湿电子纸在不同色温环境光下显示颜色不一致,影响显示图片色彩还原度的问题,提出一种基于彩色电润湿电子纸光谱反射率特性的色彩校正方法。通过彩色电润湿电子纸的光谱反射率特性,得到不同色温环境光下显示颜色的光谱对应关系,以此建立不同色温环境光下彩色电润湿电子纸显示颜色的映射关系,并根据该映射关系对输入颜色数据进行校正,从而减小不同色温环境光下显示颜色的色差。设置标准光源A(5000 K)、实验光源B(3500 K)和实验光源C(6500 K)对样品进行测试。在两个实验光源下,测量100个测试色块在经过本文方法校正前后的色度数据。实验结果表明,校正前后显示颜色与标准光源下显示颜色的平均色差分别减小了55%和35%,校正后的显示图像平均主观评价Z得分分别为0.45和0.25。

In order to solve the problem that the color of the reflective display color electrowetting display is inconsistent under ambient light with different color temperatures,which affects the color reproduction of the displayed picture,a color correction method based on the spectral reflectance characteristics of color electrowetting display is proposed.The spectral correspondence of the display color under ambient light with different color temperatures is obtained through the spectral reflectance characteristics of color electrowetting display,so as to establish the mapping relationship of the display color of color electrowetting display under ambient light with different color temperatures.According to the mapping relationship,the input color data is corrected to reduce the color difference of the displayed colors under ambient light with different color temperatures.The experimental results show that the chromaticity data of 100 test color blocks before and after the correction by the method in the two experimental light sources are reduced by 55%and 35%respectively with the average color difference of the standard light source,and the average subjective evaluation Z-scores of the corrected display images are 0.45 and 0.25.