A spectral matching method for multi-color LEDs to achieve chromaticity limitation

Abstract

The invention discloses a spectrum matching method for a multicolor LED to realize chroma limitation. The method is characterized by firstly, through sampling and measurement, acquiring spectrum sample data of each color single LED; then, converting a spectrum to be matched and illumination so as to acquire corresponding target spectral radiant brightness distribution and an absolute tristimulus value; and finally, using a constraint differential evolution algorithm to carry out iteration matching so as to acquire a corresponding LED driving value. And simultaneously, in the invention, a spectrum matching evaluation index, a chromaticity difference, an illumination error percentage are used to evaluate a matching result. By using the method, disadvantages in a current spectrum matching method are overcome, demands of an actual illumination application to the light source chromaticity, the illumination, the spectrum and other illumination quality aspects can be satisfied and a practical and effective realization method of continuous adjustment of a light source color temperature and the illumination is provided.

Description

technical field [0001] The invention relates to the field of LED lighting, in particular to a spectrum matching method for multi-color LEDs to realize chromaticity limitation. Background technique [0002] In recent years, people's awareness of low carbon, environmental protection and energy saving has been continuously enhanced, which has led to the rapid development of new LED-based lighting technologies. At present, LEDs have been widely used in various fields, such as signal indication, lighting, biomedicine, and sunlight simulators. Among them, in lighting applications, people often have specific requirements for lighting indicators such as color temperature or chromaticity, illuminance and even spectrum of the light source, while LED's rich color types, convenient dimming methods and narrow-band characteristics of spectral distribution are at the same time. It is possible to meet these needs. Therefore, it is of great practical significance for lighting applications ...

AI Technical Summary

Problems solved by technology

However, the limitations of the actual LED color types and spectral distribution will lead to imperfect spectral matching, which will further cause a mismatch between the chromaticity and illuminance of the light source, and the chromaticity and illuminance of the light source are the most important and simple and direct evaluation indicators to characterize the lighting quality exact match required

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