18 September 2014 Real time compensation of in aging effects in solid-state lighting
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Abstract
All available Solid-State Lighting (SSL) systems like LED or OLED suffer from the burden of intrinsic and extrinsic aging effects. These aging effects lead to a degeneration of brightness and color inside the light source, which can be observed far before the failure time (D70). The paper presents a solution for a real time compensation system, which is able to compensate the color and brightness of a lighting system by optical sensing and real time optimization. This approach offers the opportunity to oper ate independently from the implemented light source type and number of primary colors. The benefit is an enhancement in the overall quality and durability of the light source parameters and an elongation of the system use. The solution utilizes a full color sensor and miniaturized embedded computing capabilities to ensure the dedicated performance. Compared to the cost of LED and OLED lighting systems, the overall benefit in quality justifies the additional costs.
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M. Cappitelli, M. Cappitelli, J. R. Bleicken, J. R. Bleicken, } "Real time compensation of in aging effects in solid-state lighting", Proc. SPIE 9190, Thirteenth International Conference on Solid State Lighting, 919006 (18 September 2014); doi: 10.1117/12.2060652; https://doi.org/10.1117/12.2060652
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