Thermoresponsive scattering coating for smart white LEDs

Hugo J. Cornelissen; Joan Yu; Giovanni Cennini; Jurica Bauer; Paul P. C. Verbunt; Cees W. M. Bastiaansen; Dirk J. Broer

doi:10.1117/12.2189030

8 September 2015 Thermoresponsive scattering coating for smart white LEDs

Hugo J. Cornelissen, Joan Yu, Giovanni Cennini, Jurica Bauer, Paul P. C. Verbunt, Cees W. M. Bastiaansen, Dirk J. Broer

Proceedings Volume 9571, Fourteenth International Conference on Solid State Lighting and LED-based Illumination Systems; 957106 (2015) https://doi.org/10.1117/12.2189030
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

A novel responsive lighting system is presented capable of lowering the color temperature of emitted light on dimming. It is based on a single white light emitting LED and a thermo-responsive scattering coating. The coated LED automatically emits light of lower correlated color temperature (CCT) when the power is reduced, while maintaining a chromaticity close to the black body curve. Existing systems all use multiple color LEDs, additional control circuitry and mixing optics. An optical ray tracing model can explain the experimental results.

Citation Download Citation

Hugo J. Cornelissen, Joan Yu, Giovanni Cennini, Jurica Bauer, Paul P. C. Verbunt, Cees W. M. Bastiaansen, and Dirk J. Broer "Thermoresponsive scattering coating for smart white LEDs", Proc. SPIE 9571, Fourteenth International Conference on Solid State Lighting and LED-based Illumination Systems, 957106 (8 September 2015); https://doi.org/10.1117/12.2189030

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