Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Optimization and Fabrication of Color Temperature Tunable White LED Luminaires

색온도 가변 LED 조명 최적화 설계 및 제작

  • 강다일 (LED-해양 융합기술 연구센터 광학설계팀) ;
  • 김근율 (LED-해양 융합기술 연구센터 광학설계팀) ;
  • 유영문 (LED-해양 융합기술 연구센터 광학설계팀) ;
  • 최희락 (부경대학교 재료공학과)
  • Received : 2013.12.13
  • Accepted : 2014.03.10
  • Published : 2014.04.25
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Abstract

In this paper the spectra of correlated color temperature (CCT) tunable white light-emitting diode (LED) luminaires, consisting of commercial red, green, blue, and amber LED chips, were optimized to increase color rendering index (CRI), and a special CRI of R9 for deep red color was obtained. To improve the design's accuracy, measured LED spectra were used instead of mathematically modeled ones. Real CCT tunable LED luminaires with CRIs of 87-90 and R9s of 34-93 were fabricated and demonstrated at CCTs of 3000-6000 K.

본 논문에서는 현재 양산되고 있는 Red(621 nm), Green(530 nm), Blue(453 nm), Amber(590 nm) 등 4파장의 LED 조합을 이용하여 색온도가 가변되는 동안에도 평균연색지수 및 특별연색지수 R9 값이 높게 유지될 수 있도록 조명의 스펙트럼을 최적화하였다. 최적화 시 설계의 정확도를 높이기 위하여 실제 측정한 LED 스펙트럼을 사용하였고 광선과 기구물 사이의 상호 작용을 고려한 광선 추적 기법을 활용하여 수행하였다 또한 최적화 결과를 검증하기 위하여 색온도 가변 조명 장치를 직접 제작하였으며 광 특성을 평가한 결과 색온도가 3000 K에서 6000 K까지 변하는 동안 CRI 및 R9 값이 각각 87~90, 34~93을 나타내었다.

Keywords

References

  1. I.-T. Kim, J.-Y. Kim, and A.-S. Choi, "A basic study of control algorithm for development of the adjustable CCT LED lighting system in architectural spaces," in Proc. The Korean Institute of Illuminating and Electrical Installation Engineers 2011 Spring Conference (2011), pp. 73-74.
  2. J.-S. Lee, W.-D. Kim, and S.-Y. Kim, "Sensibility evaluation of LED lighting and fluorescent lamp based on color," Proc. Architectural Institute of Korea 25, 04 (2009).
  3. Y. J. Park, J. H. Choi, and M. G. Jang, "Optimization of light source combination through the illuminance and color temperature simulation of circadian lighting apparatus," Int. J. Contents 9, 248-254 (2009).
  4. J.-S. Yang, "A study on the autumn LED emotional lighting color through the comparative analysis of the daylighting and LED lighting color," Journal of the Korea Institute of Illuminating and Electrical Installation Engineers 25, 1-13 (2011). https://doi.org/10.5207/JIEIE.2011.25.11.001
  5. Y. Ohno, "Color rendering and luminous efficacy of white LED spectra," Proc. SPIE 5530, Fourth International Conference on Solid State Lighting, 88 (October, 2004).
  6. G. He and L. Zheng, "Color temperature tunable whitelight- emitting diode clusters with high color rendering index," Appl. Opt. 49, 4670-4676 (2010). https://doi.org/10.1364/AO.49.004670
  7. Z. Lei, G. Xia, L. Ting, G. Xiaoling, L. Q. Ming, and S. Guangdi, "Color rendering and luminous efficacy of trichromatic and tetrachromatic LED-based white LEDs," Microelectronics Journal 38, 1-6 (2007). https://doi.org/10.1016/j.mejo.2006.09.004
  8. P. Zhong, G. He, and M. Zhang, "Spectral optimization of the color temperature tunable white light-emitting diode (LED) cluster consisting of direct-emission blue and red LEDs and a diphosphor conversion LED," Opt. Express 20, A684-A693 (2012). https://doi.org/10.1364/OE.20.00A684
  9. Y. Ohno, "Spectral design considerations for white LED color rendering," Opt. Eng. 44, 111302 (2005). https://doi.org/10.1117/1.2130694
  10. G. He and L. Zheng, "White-light LED clusters with high color rendering," Opt. Lett. 35, 2955-2957 (2010). https://doi.org/10.1364/OL.35.002955
  11. H. Ries, I. Leike, and J. Muschaweck, "Optimized additive mixing of colored light-emitting diode sources," Opt. Eng. 43, 1531-1536 (2004). https://doi.org/10.1117/1.1753273

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