Journal ArticleDOI
Luminosity and Color-Rendering Capability of White Light
TLDR
The spectral power distribution of white light required to maximize luminous efficiency and the color-rendering index is approximated by additive combination of three spectral lines near 450, 540, and 610 nm.Abstract:
The spectral power distribution of white light required to maximize luminous efficiency and the color-rendering index is approximated by additive combination of three spectral lines near 450, 540, and 610 nm. The two wavelength regions near 500 and 580 nm are disadvantageous. These results are related to the color-mixture functions of human color vision. Three functions that indicate the effectiveness of red, green, and blue light for composing high-performance white light are shown.read more
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Journal ArticleDOI
Phosphors in phosphor-converted white light-emitting diodes: Recent advances in materials, techniques and properties
TL;DR: In this article, the most recent advances in the synthesis and application of phosphors for white light-emitting diodes (pc-WLEDs) with emphasis specifically on: (a) principles to tune the excitation and emission spectra of the phosphors: prediction according to crystal field theory, and structural chemistry characteristics (e.g. covalence of chemical bonds, electronegativity, and polarization effects of element); (b) pc-W LEDs with phosphors excited by blue-LED chips: phosphor characteristics, structure, and activated ions
Reference EntryDOI
Light Emitting Diodes
TL;DR: In this article, the properties of inorganic LEDs, including emission spectra, electrical characteristics, and current-flow patterns, are presented and the packaging of low power and high power LED dies is discussed.
Journal ArticleDOI
Selecting Conversion Phosphors for White Light-Emitting Diodes
TL;DR: In this article, the color rendering index (CRI) and alternative color quality indices are discussed and six main criteria are identified and discussed, which should be fulfilled by a phosphor candidate to be considered for actual application in LEDs.
Journal ArticleDOI
Solid-State Lighting: Toward Superior Illumination
Michael Shur,R. Zukauskas +1 more
TL;DR: Two approaches for generating white light from solid-state sources based on phosphor LEDs and multichip LED lamps are compared, which offer many advantages, such as chromaticity control, better light quality, and higher efficiency.
Journal ArticleDOI
Influence of junction temperature on chromaticity and color-rendering properties of trichromatic white-light sources based on light-emitting diodes
TL;DR: In this article, the luminous efficacy and color rendering indices of trichromatic white light sources were analyzed for a very broad range of wavelength combinations, and the peak emission wavelength, spectral width and output power of LEDs strongly depend on temperature and the dependencies for red, green, and blue LEDs were established.
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Journal ArticleDOI
A re-determination of the trichromatic coefficients of the spectral colours
TL;DR: Using a trichromatic colorimeter, a series of colour matches through the spectrum has been made by ten observers as discussed by the authors, and the results have been averaged and a mean set of spectral coefficients for the spectral colours derived.
Journal ArticleDOI
Some quantitative aspects of an opponent-colors theory. II. Brightness, saturation, and hue in normal and dichromatic vision.
Leo M. Hurvich,Dorothea Jameson +1 more
TL;DR: A quantitative model for an opponent-colors theory of vision is presented that is based on the CIE color mixture data for the standard observer to account for spectral brightness, saturation, and hue and some of their associated psychophysical functions in both normal and dichromatic vision.
Journal ArticleDOI
Hue-discrimination in normal colour-vision
W D Wright,F H G Pitt +1 more
TL;DR: In this article, the color discrimination curves were obtained for five normal observers, and two minima in the discrimination curve were found at about 0.60 μ and 0.49 μ.
Journal ArticleDOI
The Colour Change of Monochromatic Light with Retinal Angle of Incidence
J.M. Enoch,Walter Stiles +1 more
TL;DR: A differential, three-colour mixture method is applied to determine the complete colour change, hue and saturation of the SC II effect, and shows hue shifts of the expected kind and a small but significant supersaturation of the apparent colour of an obliquely compared with a normally incident stimulus.