Tsuei Chih-Hsuan, Sun Wen-Shing
Department of Optics and Photonics, National Central University, 32001 Chungli, Taiwan China.
Opt Express. 2011 Jul 4;19 Suppl 4:A908-13. doi: 10.1364/OE.19.00A908.
Methods for simulating the color temperature, hue and brightness of daylight illumination for indoor lighting simply by adjusting the intensity of red, green, and blue light emitting diodes are proposed. We obtain uniform color mixing with a light box by adjusting the ratios between the intensities of red, green and blue LEDs. The intensity can be found by measuring the CIE chromaticity coordinates (x, y) and the luminance Y of the daylight with a chroma meter. After the chromaticity coordinates (x, y) and the luminance Y are found, the tristimulus values can be calculated and then transferred to red, green, and blue primaries by linear transformation. With the correct ratio of red, green, and blue intensities, the color temperature, hues and brightness of daylight can be rebuilt by red, green, and blue light emitting diodes.
提出了仅通过调整红色、绿色和蓝色发光二极管的强度来模拟室内照明中日光照明的色温、色调和亮度的方法。我们通过调整红色、绿色和蓝色发光二极管强度之间的比例，利用灯箱实现均匀的颜色混合。强度可通过用色度计测量日光的CIE色度坐标（x，y）和亮度Y来确定。在找到色度坐标（x，y）和亮度Y后，可计算三色刺激值，然后通过线性变换转换为红色、绿色和蓝色原色。通过正确的红色、绿色和蓝色强度比例，红色、绿色和蓝色发光二极管可重建日光的色温、色调和亮度。
