A spectral optimization method for multi-color LEDs to achieve the best color rendering of light sources

Abstract

The invention discloses a spectrum optimization method for a multicolor LED to realize optimum light source color rendering. The method is characterized by firstly, through sampling and measurement, acquiring spectrum sample data of each color single LED; then, converting target light source chromaticity and illumination data so as to acquire an absolute tristimulus value; and finally, using a constraint differential evolution algorithm to carry out iteration optimization so as to acquire a corresponding LED driving value, and simultaneously through a color temperature error percentage, a chromaticity difference, an illumination error percentage and a color rendering evaluation index, evaluating an optimized measurement result. By using the method, a disadvantage existing in a current spectrum optimization method is overcome; demands of an actual application to the light source chromaticity, the illumination, color rendering and other illumination quality aspects can be satisfied and simultaneously a practical and effective method of realizing continuous adjustment of a light source color temperature and the illumination is provided; and an important meaning for promoting development of an intelligent illumination correlation technology is possessed.

Description

technical field [0001] The invention relates to the field of LED lighting, in particular to a spectrum optimization method for multi-color LEDs to realize optimal color rendering of light sources. Background technique [0002] The remarkable energy-saving, long life and other characteristics of LED light sources have attracted more and more people's attention. Currently, there are two main methods for producing white light for lighting: one is to excite yellow phosphor powder from blue LEDs, that is, phosphor-converted white LEDs, which have low efficiency due to Stokes drift, and it is difficult to obtain higher display efficiency. Chromaticity; the other is to combine multi-color LEDs to produce white light with the help of the rich color distribution of LEDs and the principle of color-light mixing. This method can produce the desired white light by adjusting the mixing ratio or intensity of LEDs of various colors, and this feature is also for realizing the light source. ...

AI Technical Summary

Problems solved by technology

In addition, the existing optimization methods cannot optimize the mixed spectrum of multi-color LEDs for specific light source chromaticity and illuminance.

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