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Proceedings Paper

Peak wavelength shifts and opponent color theory
Author(s): Ian Ashdown; Marc Salsbury
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Paper Abstract

We adapt the tenets of Hering's opponent color theory to the processing of data obtained from a tristimulus colorimeter to independently determine the intensity and possible peak wavelength shift of a narrowband LED. This information may then be used for example in an optical feedback loop to maintain constant intensity and chromaticity for a light source consisting of two LEDs with different peak wavelengths. This approach is particularly useful for LED backlighting of LCD display panels using red, green, and blue LEDs, wherein a tristimulus colorimeter can be used to maintain primary chromaticities to within broadcast standard limits in real time.

Paper Details

Date Published: 14 September 2007
PDF: 10 pages
Proc. SPIE 6669, Seventh International Conference on Solid State Lighting, 66690C (14 September 2007); doi: 10.1117/12.732504
Show Author Affiliations
Ian Ashdown, Philips Lighting (Canada)
Marc Salsbury, Philips Lighting (Canada)

Published in SPIE Proceedings Vol. 6669:
Seventh International Conference on Solid State Lighting
Ian T. Ferguson; Nadarajah Narendran; Tsunemasa Taguchi; Ian E. Ashdown, Editor(s)

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