Solar spectrum matching based on different white OLEDs for comfortable lighting

Abstract

Based on different white OLEDs with the high power monochromatic LEDs matches the solar visible spectrum in 380−780 nm. The correlation index (R2) describes the similarity degree between the matching spectrum and solar visible spectrum. We investigate three different white OLEDs. The optimal algorithm deals with different spectrums of white OLEDs mixing with high power monochromatic LEDs to get different optimal combinations. In the optimal combinations, the subtraction experiments mean that the species of high power monochromatic LEDs are reduced. According to the subtraction experiments, the renew R2, correlated color temperature (CCT) and the color-rendering index (Ra) are calculated. As a result, the best OLED, which is the most suitable for matching the solar visible spectrum, is optimized. And the best optimal combination includes a white OLED and 34 species of monochromatic LEDs with the best correlation index of 94.31 %. With deleted monochromatic LEDs species, the R2, CCT and Ra are also changed. When the R2 is lowest, Ra can still reach 94.0219 with the CCT of 5309 K. It achieves better color rendering when the R2 is lowest. This can save a large number of the species and amount of monochromatic LEDs to match solar visible spectrum for comfortable lighting.