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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 3 — Jan. 31, 2011
  • pp: 2519–2529

Optimal spectra of the phosphor-coated white LEDs with excellent color rendering property and high luminous efficacy of radiation

Guoxing He and Huafeng Yan  »View Author Affiliations


Optics Express, Vol. 19, Issue 3, pp. 2519-2529 (2011)
http://dx.doi.org/10.1364/OE.19.002519


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Abstract

A model for spectra of the phosphor-coated white LED (p-W LED) with a blue chip, a red chip, and green and yellow phosphors is presented. The optimal spectra of p-W LEDs with correlated color temperatures (CCTs) of 2700–6500 K have been obtained with a nonlinear program for maximizing luminous efficacy of radiation (LER) under conditions of both color-rendering indices (CRIs) and special CRIs of R9 strong red above 98. The simulation results show that p-W LEDs with one InGaN blue (450 nm) chip, one AlGaInP red (634 nm) chip, and green (507 nm) and yellow (580 nm) silicate phosphors can realize white lights with CRIs of about 98 and special CRIs of R9 for strong red above 98. The average of the special CRIs R9 to R12 for the four saturated colors (red, yellow, green, and blue) is above 95. R13 for the skin of women’s faces at about 100, as well as LERs above 296 lm/W at CCTs of 2700–6500 K. LERs of excellent CRI p-W LEDs with one InGaN blue chip, one AlGaInP red chip, and green and yellow silicate phosphors increased by 19–49% when compared with that of excellent CRI p-W LEDs with one InGaN blue chip and green and yellow silicate phosphors, as well as red nitride phosphor.

© 2011 OSA

OCIS Codes
(230.3670) Optical devices : Light-emitting diodes
(330.1715) Vision, color, and visual optics : Color, rendering and metamerism

ToC Category:
Optical Devices

History
Original Manuscript: October 28, 2010
Revised Manuscript: December 29, 2010
Manuscript Accepted: January 7, 2011
Published: January 26, 2011

Virtual Issues
Vol. 6, Iss. 2 Virtual Journal for Biomedical Optics

Citation
Guoxing He and Huafeng Yan, "Optimal spectra of the phosphor-coated white LEDs with excellent color rendering property and high luminous efficacy of radiation," Opt. Express 19, 2519-2529 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-3-2519


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References

  1. E. F. Schubert and J. K. Kim, “Solid-state light sources getting smart,” Science 308(5726), 1274–1278 (2005). [CrossRef] [PubMed]
  2. International Commission on Illumination, Method of measuring and specifying colour rendering properties of light sources, ISBN 978–3900734572 (1995).
  3. Y. Ohno, “Color rendering and luminous efficacy of white LED spectra,” Proc. SPIE 5530, 88–98 (2004). [CrossRef]
  4. I. Speier and M. Salsbury, “Color temperature tunable white light LED system,” Proc. SPIE 6337, 63371F, 63371F-12 (2006). [CrossRef]
  5. Y. L. Li, J. M. Shah, P. H. Leung, Th. Gessmann, and E. F. Schubert, “Performance characteristics of white light sources consisting of multiple LEDs,” Proc. SPIE 5187, 178–184 (2004). [CrossRef]
  6. A. Žukauskas, R. Vaicekauskas, F. Ivanauskas, R. Gaska, and M. S. Shur, “Optimization of white polychromatric semiconductor lamps,” Appl. Phys. Lett. 80(2), 234–236 (2002). [CrossRef]
  7. N.-C. Hu, C.-C. Wu, S.-F. Chen, and H.-C. Hsiao, “Implementing dynamic daylight spectra with light-emitting diodes,” Appl. Opt. 47(19), 3423–3432 (2008). [CrossRef] [PubMed]
  8. Y. H. Won, H. S. Jang, K. W. Cho, Y. S. Song, D. Y. Jeon, and H. K. Kwon, “Effect of phosphor geometry on the luminous efficiency of high-power white light-emitting diodes with excellent color rendering property,” Opt. Lett. 34(1), 1–3 (2009). [CrossRef]
  9. C. H. Huang and T. M. Chen, “Ca9La(PO4)7:Eu2+,Mn2+: an emission-tunable phosphor through efficient energy transfer for white light-emitting diodes,” Opt. Express 18(5), 5089–5099 (2010), http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-5-5089 . [CrossRef] [PubMed]
  10. T. W. Kuo, W. R. Liu, and T. M. Chen, “High color rendering white light-emitting-diode illuminator using the red-emitting Eu(2+)-activated CaZnOS phosphors excited by blue LED,” Opt. Express 18(8), 8187–8192 (2010), http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-8-8187 . [CrossRef] [PubMed]
  11. R. Mirhosseini, M. F. Schubert, S. Chhajed, J. Cho, J. K. Kim, and E. F. Schubert, “Improved color rendering and luminous efficacy in phosphor-converted white light-emitting diodes by use of dual-blue emitting active regions,” Opt. Express 17(13), 10806–10813 (2009), http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-13-10806 . [CrossRef] [PubMed]
  12. W. Davis and Y. Ohno, “Color qulity scale,” Opt. Eng. 49(3), 033602 (2010). [CrossRef]
  13. J. Worthey, “Color rendering: asking the questions,” Color Res. Appl. 28(6), 403–412 (2003). [CrossRef]
  14. K. Hashimoto and Y. Nayatani, “Visual clarity and feeling of contrast,” Color Res. Appl. 19(3), 171–185 (1994). [CrossRef]
  15. G. X. He and L. H. Zheng, “White-light LED clusters with high color rendering,” Opt. Lett. 35(17), 2955–2957 (2010). [CrossRef] [PubMed]
  16. I. Moreno and U. Contreras, “Color distribution from multicolor LED arrays,” Opt. Express 15(6), 3607–3618 (2007), http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-6-3607 . [CrossRef] [PubMed]

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