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  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 6, Iss. 8 — Aug. 26, 2011

Momentary adjusting methods for simulating the color temperature, hues and brightness of daylight illumination with RGB LEDs for indoor lighting

Chih-Hsuan Tsuei and Wen-Shing Sun  »View Author Affiliations

Optics Express, Vol. 19, Issue S4, pp. A908-A913 (2011)

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Methods for simulating the color temperature, hue and brightness of daylight illumination for indoor lighting simply by adjusting the intensity of red, green, and blue light emitting diodes are proposed. We obtain uniform color mixing with a light box by adjusting the ratios between the intensities of red, green and blue LEDs. The intensity can be found by measuring the CIE chromaticity coordinates (x, y) and the luminance Y of the daylight with a chroma meter. After the chromaticity coordinates (x, y) and the luminance Y are found, the tristimulus values can be calculated and then transferred to red, green, and blue primaries by linear transformation. With the correct ratio of red, green, and blue intensities, the color temperature, hues and brightness of daylight can be rebuilt by red, green, and blue light emitting diodes.

© 2011 OSA

OCIS Codes
(230.3670) Optical devices : Light-emitting diodes
(330.1690) Vision, color, and visual optics : Color
(220.2945) Optical design and fabrication : Illumination design
(080.4295) Geometric optics : Nonimaging optical systems

ToC Category:
Light-Emitting Diodes

Original Manuscript: March 9, 2011
Revised Manuscript: June 22, 2011
Manuscript Accepted: June 23, 2011
Published: July 1, 2011

Virtual Issues
Vol. 6, Iss. 8 Virtual Journal for Biomedical Optics
Optics in LEDS for Lighting (2011) Optics Express

Chih-Hsuan Tsuei and Wen-Shing Sun, "Momentary adjusting methods for simulating the color temperature, hues and brightness of daylight illumination with RGB LEDs for indoor lighting," Opt. Express 19, A908-A913 (2011)

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