Parameters and characteristics of light sources based on light-emitting diodes

Abstract

This study is devoted to experiments, simulation and analysis of color characteristics of LEDs with variable correlated color temperature (CCT). Is also contains overview of the stages of LED development, basics concepts of lighting engineering and colorimetry. Since the light sources are designed to illuminate places with a lack of natural light, the main factor for determining their properties is human perception. For this reason, it is important to consider the nonlinear response of the eye to radiation with different wavelengths. All light sources have different spectral composition and are perceived in different ways. Thus, the previously developed methods of color rendering index (CRI) and color quality scale (CQS) make it possible to evaluate the quality of the radiation. For this purpose, spectral measurements of color and white LEDs were carried out. Also a computer program in MATLAB environment was developed for spectral simulation of LEDs and to calculate their color characteristics.