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Proceedings Paper

LED white lights with high CRI and high luminous efficacy
Author(s): Guoxing He; Lihong Zheng; Huafeng Yan
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Paper Abstract

The models for spectra of a phosphor-coated white (p-W) LED and a white light LED cluster are developed based on the principle of additive color mixture. The simulation results show that p-W LEDs consisting of a blue chip (450nm), green phosphor (507 nm), yellow phosphor (580 nm) and red phosphor (655 nm) could realize color rendering indices (CRIs) above 97.7 and special CRIs of R1 to R14 above 91.1, but luminous efficacies of radiation (LERs) below 250.3 lm/W, that white/red clusters consisting of red LEDs and p-W LEDs with a blue chip (450nm), green (507 nm) and yellow (580 nm) phosphors could realize given color temperature white light with CRIs above 97.9 and special CRIs of R1 to R14 above 89.6, as well as LERs above 296.3 lm/W, and that a neutral-white /red//blue cluster consisting of blue LEDs (465 nm), red LEDs (628 nm) and neutral-white LEDs with a blue chip (452 nm), green (530 nm) and yellow (586 nm) phosphors could realize CCT tunable white lights with CRIs above 97.9 and special CRIs of R1 to R14 above 89.6, as well as LER above 296.3 lm/W.

Paper Details

Date Published: 15 November 2010
PDF: 9 pages
Proc. SPIE 7852, LED and Display Technologies, 78520A (15 November 2010); doi: 10.1117/12.867941
Show Author Affiliations
Guoxing He, Donghua Univ. (China)
Lihong Zheng, Donghua Univ. (China)
Huafeng Yan, Shanghai Yaming Lighting Co., Ltd. (China)


Published in SPIE Proceedings Vol. 7852:
LED and Display Technologies
Gang Yu; Yanbing Hou, Editor(s)

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