18 August 2009 Color rendering ability and luminous efficacy enhancements in white light-emitting diodes
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Abstract
There exists a fundamental trade-off relation between color rendering index (CRI) and luminous efficacy; in other words, improvements in one are generally detrimental to the other. We analyze and demonstrate through simulation that phosphor-converted white LEDs with dual-blue emitting active regions, as opposed to single-blue emitting active regions, significantly enhance color rendering ability while maximizing the output luminous flux. The improvements are achieved over a broad range of correlated color temperatures.
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Roya Mirhosseini, Roya Mirhosseini, Martin Schubert, Martin Schubert, Sameer Chhajed, Sameer Chhajed, Jaehee Cho, Jaehee Cho, Jong Kyu Kim, Jong Kyu Kim, E. Fred Schubert, E. Fred Schubert, } "Color rendering ability and luminous efficacy enhancements in white light-emitting diodes", Proc. SPIE 7422, Ninth International Conference on Solid State Lighting, 742212 (18 August 2009); doi: 10.1117/12.836996; https://doi.org/10.1117/12.836996
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