Cluster LEDs mixing optimization by lens design techniques

Ming Chin Chien, Chung-Hao Tien

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


This paper presents a methodology analogous to a general lens design rule to optimize step-by-step the spectral power distribution of a white-light LED cluster with the highest possible color rendering and efficiency in a defined range of color temperatures. By examining a platform composed of four single-color LEDs and a phosphor-converted cool-white (CW) LED, we successfully validate the proposed algorithm and suggest the optimal operation range (correlated color temperature = 2600–8500 K) accompanied by a high color quality scale (CQS > 80 points) as well as high luminous efficiency (97% of cluster’s theoretical maximum value).

Original languageEnglish
Pages (from-to)A804-A817
JournalOptics Express
Issue number104
StatePublished - 4 Jul 2011

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