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Chapter 13. Color Quality of White LEDs



Yoshihiro Ohno


This chapter overviews the fundamentals of chromaticity and color rendering as the two important aspects of color quality of light sources for general illumination, with special focus on the use for solid state light sources. The section for chromaticity discusses chromaticity coordinates and diagrams, correlated color temperature (CCT), Duv, and specifications for color differences. The section for color rendering discusses object color evaluation, the color rendering index (CRI) including its shortcomings, and color quality beyond CRI, introducing the color quality scale (CQS), a proposed metric. The chapter also introduces luminous efficacy of radiation and the color characteristics used for single color LEDs. Finally future considerations on color quality for white LED developments are discussed.
llI-Nitride based Light Emitting Diodes and Applications
Publisher Info
Springer DE, Berlin, -1


chromaticity, correlated color temperature, color difference, color quality, color quality scale, color rendering, color rendering index, Duv


Ohno, Y. (2013), Chapter 13. Color Quality of White LEDs, llI-Nitride based Light Emitting Diodes and Applications, Springer DE, Berlin, -1, [online], (Accessed April 24, 2024)
Created May 24, 2013, Updated November 10, 2018