Evaluating the 1931 CIE color‐matching functions

Shaw, Mark Q.; Fairchild, Mark D.

doi:10.1002/col.10077

Cited by 55 publications

(35 citation statements)

References 20 publications

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“…For example, the range of color difference of ⌬E* ab for the 10°field was 0.83 to 32.58 with a standard deviation of 6.1. These magnitudes, ranges, and standard deviations are comparable to those found by Shaw and Fairchild, 22 who found a mean color difference of 4.02 and ⌬E* ab with a range from 0.2 to 22 with the CIE 1964 CMFs for their experimental data. Table III shows that although ⌬E* ab has a greater magnitude than ⌬E * 94 , they have the same trend for the two matching conditions.…”

Section: Descriptive Summary Statisticssupporting

confidence: 88%

Large‐field color matching functions

Hu¹,

Houser²

2005

Color Research & Application

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Section: Descriptive Summary Statisticssupporting

confidence: 88%

Large‐field color matching functions

Hu¹,

Houser²

2005

Color Research & Application

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“…Despite all the shortcomings of the 1931 CIE system, it is still used and still undergoing evaluation. [12][13][14] …”

Section: Discussionmentioning

confidence: 98%

A critical review of the development of the CIE1931 RGB color‐matching functions

Broadbent

2004

Color Research & Application

122

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“…6 (a) shows the Commission Internationale de I'Eclairage (CIE) chromaticity coordinates of the emission of the glass ceramics. According to the 1931 CIE-XYZ Coordinate System [22] of the CIE, the CIE coordinates of the emission of the glass ceramics, including the excitation source line, are calculated as (0.33, 0.38). Thus, it falls into warm white light region and is suitable for indoor high power illumination.…”

Section: +mentioning

confidence: 99%

White light generation of glass ceramics containing Ba2LaF7:Eu2+, Tb3+ and Sm3+ nanocrystals

Xu¹,

Cui²,

Fu³

et al. 2012

中国光学快报

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The Eu2+ /Tb 3+ /Sm 3+ co-doped oxyfluoride glass ceramics containing Ba2LaF7 nanocrystals are prepared in the reducing atmosphere. The X-ray diffraction results show that Eu 2+ , Tb 3+ and Sm 3+ ions are enriched into the precipitated Ba2LaF7 nanophase after the annealing process. It deduces efficient energy transfers from Eu 2+ to Tb 3+ and Sm 3+ and intenses warm white luminescence of the glass ceramics. Comparing with the glass, the luminescence quantum yield of the glass ceramics is also enlarged by about 3 times. This demonstrates the potential white light-emitting diode application of the glass ceramics produced in this letter.OCIS codes: 160.2540, 160.5690, 160.6990. doi: 10.3788/COL201210.031602.White light-emitting diodes (LEDs) are considered new generation illumination technology, since they have longer lifetimes, highly efficiency, better reliability, and are environment-friendly [1−3] . The development of very efficient ultraviolet (UV)/blue LEDs based on a wideband gap semiconductor, such as GaN, has led to considerable progress in the field of solid-state lighting as well as backlighting for display application [4,5] . Although white light is easily achieved in a YAG:Ce-based system, the individual degradation rate between the blue LED and yellow phosphor causes chromatic aberration and poor white light performance after long working periods [6] . Glass ceramics might be good alternatives for white LEDs (WLEDs), due the following advantages: heat resistance, easy formability, and low porosity compared with sintered ceramics [7−12] . The oxyfluoride glass ceramics are considered ideal rare earth ion hosts, because such materials combine the excellent luminescent environment of fluoride crystals and good chemical stability of oxide glass [13,14] . In this letter, Eu 2+ /Tb 3+ /Sm 3+ co-doped fluorosilicate glass ceramics containing Ba 2 LaF 7 nanocrystals are investigated as WLED materials. The Eu 2+ ions are characterized by their broad and intense f-d absorption and emission bands in ultraviolet to visible range that are widely utilized as phosphor dopants [15,16] . The efficient energy transfers (ETs) from Eu 2+ to Tb 3+ and Sm 3+ bring strong luminescence of materials, and red emission from Sm 3+ is ideal in improving the color rendering index (CRI).Oxyfluoride glass with the composition of 45SiO 2 -15Al 2 O 3 -7La 2 O 3 -12Na 2 O -15BaF 2 -0.3EuF 2 -2.7TbF 3 -3SmF 3 was prepared by melting appropriate batch materials (SiO 2 , Al 2 O 3 , La 2 O 3 , Na 2 CO 3 , BaF 2 , EuF 3 , TbF 3 , and SmF 3 ) in covered corundum crucibles at about 1 350• C for 35 min. A reducing atmosphere was applied by using carbon crucibles and carbon granules to reduce Eu 3+ to Eu 2+ ions during melting. To obtain the glass, the melt was poured on a brass mould, which was then pressed by another brass plate. The glass ceramic sample was obtained by annealing the glass for 2 hat 630• C. The glass and glass ceramics were polished on a UNJ-POL-802 precision lapping/polishing machine.X-ray diffraction (XRD, XD-98) measurem...

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Evaluating the 1931 CIE color‐matching functions

Cited by 55 publications

References 20 publications

Large‐field color matching functions

Large‐field color matching functions

A critical review of the development of the CIE1931 RGB color‐matching functions

White light generation of glass ceramics containing Ba2LaF7:Eu2+, Tb3+ and Sm3+ nanocrystals

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