期刊
OPTICAL ENGINEERING
卷 44, 期 11, 页码 -出版社
SPIE-INT SOCIETY OPTICAL ENGINEERING
DOI: 10.1117/1.2130694
关键词
color rendering; colorimetry; CRI; lighting; luminous efficacy; solid-state lighting; LED; white LED
类别
White LED spectra for general lighting should be designed for high luminous efficacy as well as good color rendering. Multichip and phosphor-type white LED models were analyzed by simulation of their color characteristics and luminous efficacy of radiation, compared with those of conventional light sources for general lighting. Color rendering characteristics were evaluated based on the CIE Color Rendering Index (CRI), examining not only R-a but also the special color rendering indices R-i, as well as on the CIELAB color difference Delta E-ab(*) for the 14 color samples defined in CIE 13.3. Several models of three-chip and four-chip white LEDs as well as phosphor-type LEDs are optimized for various parameters, and some guidance is given for designing these white LEDs. The simulation analysis also demonstrated several problems with the current CRI, and the need for improvements is discussed. (c) 2005 Society of Photo-Optical Instrumentation Engineers.
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