Color rendering ability and luminous efficacy enhancements in white light-emitting diodes

Roya Mirhosseini; Martin Schubert; Sameer Chhajed; Jaehee Cho; Jong Kyu Kim; E. Fred Schubert

doi:10.1117/12.836996

18 August 2009 Color rendering ability and luminous efficacy enhancements in white light-emitting diodes

Roya Mirhosseini, Martin Schubert, Sameer Chhajed, Jaehee Cho, Jong Kyu Kim, E. Fred Schubert

Proceedings Volume 7422, Ninth International Conference on Solid State Lighting; 742212 (2009) https://doi.org/10.1117/12.836996
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

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.

Citation Download Citation

Roya Mirhosseini, Martin Schubert, Sameer Chhajed, Jaehee Cho, Jong Kyu Kim, and 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); https://doi.org/10.1117/12.836996

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