Sistema RGB com controle de fluxo luminoso e redução de variação cromática

Abstract

This work proposes a control methodology of luminous flux through independent sink temperature and current applied to red, green and blue LEDs. The main characteristics of solid-state lighting and LEDs themselves are presented, along an architectural approach trends in decorative lighting and artistic scope. Also are discussed the color theory and the history of regulation of colors through the standard CIE (International Commission on Illumination) since the creation of CIE 1931 to the CIE 1976 standard, creating an uniform space for the comparison of results of luminous sources. The constant flux system is proposed, using the equations for estimating the flux that is controlled by a microprocessor in practice, obtaining satisfactory results when compared with the open-loop dimmer system, resulting in a low chromatic variation Δu'v' regarding to studied set of colors, thus representing an imperceptible change to the human eye, taking into account the CIE 1976 standard.