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Proceedings Paper

Color perception under illumination by quadrichromatic solid-state lamp
Author(s): Rytis Stanikunas; Henrikas Vaitkevicius; Algimantas Svegzda; Vilius Viliunas; Zenius Bliznikas; Kestutis Breive; Rimantas Vaicekauskas; Algirdas Novickovas; Genadij Kurilcik; Arturas Zukauskas; Remis Gaska; Michael S. Shur
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Paper Abstract

Lighting based on sources of light composed of colored light-emitting diodes (LEDs) offers versatile control of color and a possibility of trade-off between efficiency and color rendering. However, psychophysical issues related to such polychromatic solid-state sources have to be addressed. In this work, studies of the perception of standard colors under illumination with a quadrichromatic red-amber-green-blue (RAGB) solid-state source were carried out. An RAGB lamp containing primary LEDs with the emission peaks at 638 nm, 594 nm, 523 nm, and 441 nm and optimized for the highest value of the general color rendering index (86 points) was investigated and compared to a tungsten lamp. 40 standard Munsell samples of value 6, chroma /6, and hue incremented by 2.5 were used in the investigation. Changes in the saturation and hue of the Munsell samples illuminated by the RAGB lamp versus tungsten lamp (both with the correlated temperature of 2600 K) were obtained by colorimetric calculation comparisons and by psychophysical experiments on subjective matching of the samples. Subjective differences in hue and subjective color discrimination differences under the tungsten and RAGB lamps were found in the wavelength range of 440-500 nm and 560-580 nm. We attribute these differences to non-optimal peak wavelengths of the primary LEDs and to the narrow-band components of the RAGB spectrum.

Paper Details

Date Published: 20 October 2004
PDF: 7 pages
Proc. SPIE 5530, Fourth International Conference on Solid State Lighting, (20 October 2004); doi: 10.1117/12.565128
Show Author Affiliations
Rytis Stanikunas, Vilnius Univ. (Lithuania)
Henrikas Vaitkevicius, Vilnius Univ. (Lithuania)
Algimantas Svegzda, Vilnius Univ. (Lithuania)
Vilius Viliunas, Vilnius Univ. (Lithuania)
Zenius Bliznikas, Vilnius Univ. (Lithuania)
Kestutis Breive, Vilnius Univ. (Lithuania)
Rimantas Vaicekauskas, Vilnius Univ. (Lithuania)
Algirdas Novickovas, Vilnius Univ. (Lithuania)
Genadij Kurilcik, Vilnius Univ. (Lithuania)
Arturas Zukauskas, Vilnius Univ. (Lithuania)
Remis Gaska, Sensor Electronic Technology, Inc. (United States)
Michael S. Shur, Sensor Electronic Technology, Inc. (United States)

Published in SPIE Proceedings Vol. 5530:
Fourth International Conference on Solid State Lighting
Ian T. Ferguson; Nadarajah Narendran; Steven P. DenBaars; John C. Carrano, Editor(s)

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