Precision Lighting of LED Array using an Individually Adjustable Color Temperature and Luminous Flux Technology

Min-Wei Hung, Wen-Ning Chuang, Cheng-Ru Li, Kuo-Cheng Huang, Yu-Hsuan Lin

2017

Abstract

This paper presents a novel white light LED array equipped with a 3-pulse-width-modulation (PWM) control module that could separately adjust either the color temperature or luminous flux without influence on the other. An optical measurement system was set up to provide the complete information of color temperature, illuminance and spectrum of the LED array for analysis. The radiometry quantity of spectral data was converted into photometry quantity. The average percent deviations of color temperatures with a fixed illuminance, and illuminances with a fixed color temperature were estimated, respectively. Comparing with the existing commercial products, the developed LED array has better adjustability, stability and precision. The proposed innovations represent a novel solution for white light LED lighting technology and related applications.

References

  1. Nadarajah, N., Yimin G., 2005. Life of LED-Based White Light Sources. Journal of Display Technology, Vol. 1(1), pp. 167-171.
  2. Ye, S., Xiao, F., Pan, Y.X., Ma, Y.Y., Zhang, Q.Y., 2010. Phosphors in phosphor-converted white light-emitting diodes: Recent advances in materials, techniques and properties. Materials Science and Engineering, Vol. 71(1), pp. 1-34.
  3. Ingo, S., Marc, S., 2006. Color temperature tunable white light LED system. Proc. SPIE, p. 6337.
  4. Sheu, J. K., Chang, S. J., Kuo, C.H., Su, Y. K., Wu, L.W., Lin, Y. C., Lai, W. C., Tsai, J. M., Chi, G. C., Wu, R. K., 2003. White-light emission from near UV InGaNGaN LED chip precoated with blue/green/red phosphors. IEEE Photonics Technology Letters, Vol. 15(1), pp. 18-20.
  5. Yoshi, O., 2005. Spectral design considerations for white LED color rendering. Opt. Eng., Vol. 44(11), p. 111302.
  6. Guoxing, H., Huafeng, Y., 2011. Optimal spectra of the phosphor-coated white LEDs with excellent color rendering property and high luminous efficacy of radiation. Optics Express, Vol. 19(3), pp. 2519-2529.
  7. Guoxing, H., Lihong Z., 2010. Color temperature tunable white-light light-emitting diode clusters with high color rendering index. Applied Optics, Vol. 49(24), pp. 4670-4676.
  8. Jung-Chieh, S., Chun-Lin L., 2009. Color temperature tunable white light emitting diodes packaged with an omni-directional reflector. Optics Express, Vol. 17(24), pp. 21408-21413.
  9. Elodie, M., Jean-Jacques, E., F, Viénot., 2009. Testing LED lighting for colour discrimination and colour rendering. Color Research & Application, Vol. 34(1), pp. 8-17.
  10. Prathyusha, N., D.S, Z., 2004, An effective LED dimming approach. Proc. IEEE Ind. Appl. Conf., pp. 1671-1676.
  11. Montu, D., Regan, Z., 2007. Digital Architecture for Driving Large LED Arrays with Dynamic Bus Voltage Regulation and Phase Shifted PWM. Proc. IEEE Appl. Power Electron. Conf. (APEC), pp. 287-293.
  12. David, Gacio., J. Marcos, Alonso., Jorge G., Lidia C., Mario, J. C., Manuel R-S., 2012. PWM series dimming for slow-dynamics HPF LED drivers: The high-frequency approach. IEEE Trans. Ind. Electron., Vol. 59(4), pp. 1717-1727.
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Paper Citation


in Harvard Style

Hung M., Chuang W., Li C., Huang K. and Lin Y. (2017). Precision Lighting of LED Array using an Individually Adjustable Color Temperature and Luminous Flux Technology . In Proceedings of the 5th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS, ISBN 978-989-758-223-3, pages 183-190. DOI: 10.5220/0006112001830190


in Bibtex Style

@conference{photoptics17,
author={Min-Wei Hung and Wen-Ning Chuang and Cheng-Ru Li and Kuo-Cheng Huang and Yu-Hsuan Lin},
title={Precision Lighting of LED Array using an Individually Adjustable Color Temperature and Luminous Flux Technology},
booktitle={Proceedings of the 5th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,},
year={2017},
pages={183-190},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0006112001830190},
isbn={978-989-758-223-3},
}


in EndNote Style

TY - CONF
JO - Proceedings of the 5th International Conference on Photonics, Optics and Laser Technology - Volume 1: PHOTOPTICS,
TI - Precision Lighting of LED Array using an Individually Adjustable Color Temperature and Luminous Flux Technology
SN - 978-989-758-223-3
AU - Hung M.
AU - Chuang W.
AU - Li C.
AU - Huang K.
AU - Lin Y.
PY - 2017
SP - 183
EP - 190
DO - 10.5220/0006112001830190