CIE colour coordinates

The CIE colour coordinates of these red, green and blue phosphors are shown in Table 3.5. 

Fig. 9.13 CIE colour coordinate of an rGO-embedded remote phosphor compared with phosphor film. Reproduced from Ref [56] by permission of The Royal Society of Chemistry...

Fig. 2 Photoluminescence and photoluminescence excitation spectra of Eu complex-capped ZnSe hybrid QDs synthesised from (a) Eu acetate hydrate, (b) Eu acetylacetonate hydrate and (c) CIE colour coordinates and images of ZnSe QDs (1), Eu-complexes (2) and Eu complex-capped ZnSe QDs (3). Reproduced with permission from reference 9. Copyright The Royal Society of Chemistry 2011.

Fig. 12.7 CIE xy colour coordinates Q,eft) and the observed sensor emission colour (right) of a dual-lumophore sensor at different % p02- Revised from [51]...

Chromaticity coordinates are two numbers (denoted jc and y) which together represent in the CIE system the colour quality. 

The color of a light source is typacally characterized in terms of its color temperature. If the x,y coordinates of an illumination source do not exactly sit on the blackbody locus, the color of a light source is characterized in terms of its CCT. The CCT is the temperature of a blackbody radiator that has a colour that most closely matches the emission from a non-blackbody radiator. For high quality white light illumination the CCT should between 2500K and 6500 K. There is an accepted method (Wyszelki et al 1982) to determine lines of constant correlated color temperature in x, y space. CIE, CCT and CRI for common white light sources are given in Table 1 for comparison purpose (Misra et al 2006). 

Table 1. Chromaticity coordinates (CIE), correlated colour temperature (CCT) and colour rendering indices (CRI) for common white light sources.

The CIE is an international body which coordinates worldwide cooperation and exchange of information on matters relating to illumination, colour, vision and image technology. It is recogtused as an international standardisation body, and has defined and standardised several colour spaces. For more information on the CIE and the CIELAB colour space (an internet search on the term CIELAB will produce thousands of additional links) http /Avww.cie.co.at/ [accessed July 2011] ISO 11664-4 2008(E), CIE Colorimetry — Part 4 1976 L a b Colour Space, CIE, Vienna. 

McDonald R (ed) (1997) Colour physics for industry, 2nd edn. Society of Dyers and Colourists, West Yorkshire, England. See chromaticity coordinates, CIE. 

The X and y chromaticity coordinates are typically plotted in a two-dimensional grid known as the CIE (x,y)-chromaticity diagram (Fig. 14.8). The curve is made of the pure spectral colours from the blue to the red, covering the entire visible... 

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