Color and brightness discrimination of white LEDs

Patricia Rizzo; Andrew Bierman; Mark S. Rea

doi:10.1117/12.452575

26 November 2002 Color and brightness discrimination of white LEDs

Patricia Rizzo, Andrew Bierman, Mark S. Rea

Proceedings Volume 4776, Solid State Lighting II; (2002) https://doi.org/10.1117/12.452575
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

Great strides have recently been made in the development of white light emitting diodes (LEDs), although perceptible variations remain in the color and brightness of nominally identical products. The objective of this study was to examine color and brightness discriminability between different white LEDs when used as illuminants of colored and achromatic objects. A method of successive comparisons was used to assess discriminability rather than the more typical simultaneous (side-by-side) comparisons using a "same-different" response protocol. Three-dimensional "tolerance zones" were developed based upon discriminability in a chromaticity (u', v') and luminance when illuminating the colored and achromatic objects. These "tolerance zones" could be used to establish specification tolerances for different lighting applications.

Citation Download Citation

Patricia Rizzo, Andrew Bierman, and Mark S. Rea "Color and brightness discrimination of white LEDs", Proc. SPIE 4776, Solid State Lighting II, (26 November 2002); https://doi.org/10.1117/12.452575

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