Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지
DOI QR코드

DOI QR Code

The Comparison of the Application of Two Different Color Quality Evaluation Methods

  • Jeong, Hee-Suk (Dept. of Electrical and Electrical Engineering, Soongsil University) ;
  • Ryeom, Jeongduk (Dept. of Electrical and Electrical Engineering, Soongsil University)
  • Received : 2017.08.29
  • Accepted : 2018.04.02
  • Published : 2018.07.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, the fabrication of a white light-emitting diode (WLED) package capable of producing different color rendering indexes (CRI ($R_a$)) using different types of phosphors (YAG:Ce, Silicate, Nitride, LuAG) for the LEDs is presented. The color quality is evaluated based on the current and temperature variation conditions. The evaluation method for color quality compares the existing CIE 13.3 method and the new IES TM-30-15 method. The CRI ($R_a$) defined in the conventional CIE 13.3 has the disadvantage. This cannot offer any information relevant to the user's preference. However, the newly proposed IES TM-30-15 method suggests the additional measure related to user's preference such as Color Gamut ($R_g$). The present experimental results obtained using the IES TM-30-15 show that the color quality of the WLEDs using green and red phosphors are better than that of the WLEDs using yellow phosphor, but their luminous efficacies are lower. The color quality of WLEDs using green and red phosphors are more stable than that of the WLEDs using yellow phosphor, for current and temperature variations, and it is verified that the phosphor causes this change. The evaluation method for color quality, based on IES TM-30-15, is proved to be capable of overcoming the problems of the existing evaluation methods by this study.

Keywords

References

  1. Xiang Lei, Huai Zheng, Xing Guo, Zefeng Zhang, Jiading Wu, Chunlin Xu and Sheng Liu, "Reduction of Die-Bonding Interface Thermal Resistance for High-Power LEDs Through Embedding Packaging Structure," IEEE Trans. Power Electron., vol. 32, no. 7, pp. 5520-5526, Jul. 2017. https://doi.org/10.1109/TPEL.2016.2609891
  2. Pin-Chao Wang, Yan-Kuin Su, Chun-Liang Lin and Guan-Syun Huang, "Improving Performance and Reducing Amount of Phosphor Required in Packaging of White LEDs with $TiO_2$-Doped Silicone," IEEE Electron Devices Lett., vol. 35, no. 6, pp. 657-659, Jun. 2014. https://doi.org/10.1109/LED.2014.2318037
  3. Chung-Hao Chiang, Syuan-Jhih Gong, Ting-Shi Zhan, Kuo-Ching Cheng and Sheng-Yuan Chu, "White Light-Emitting Diodes With High Color Rendering Index and Tunable Color Temperature Fabricated Using Separated Phosphor Layer Structure," IEEE Electron Devices Letters, vol. 37, no. 7, pp. 898-901, Jul. 2016. https://doi.org/10.1109/LED.2016.2576498
  4. Chih-Chieh Yang, Chih-Min Lin, Yi-Jung Chen, Yi- Tsuo Wu and Shih-Ren Chuang, "Highly Stable Three- Band White Light from an InGaN-Based Blue Light- Emitting Diode Chip Precoated with (Oxy) nitride Green/Red Phosphors," Appl. Phys. Lett., vol. 90, no. 12, 123503, Mar. 2007. https://doi.org/10.1063/1.2714326
  5. Chang-Hae Kim, "Blue LED Based Phosphor Technology for Lighting," Ceramist, vol. 16, no. 2, pp. 13-20, June 2013.
  6. Naoki Kimura, Ken Sakuma, Syunichiro Hirafune and Kenichiro Asano, "Extrahigh Color Rendering White Light-Emitting Diode Lamps Using Oxynitride and Nitride Phosphors Excited by Blue Light-Emitting Diode," Appl. Phys. Lett., vol. 90, no. 5, 051109, Feb. 2007. https://doi.org/10.1063/1.2437090
  7. Hyun-Woo Choi, Min Hyuk Choi and Jae-Hyeon Ko, "Effect of Temperature on the Luminous Properties of White-Light-Emitting Diodes with Red and Green Phosphors," New Phys.: Sae Mulli, vol. 63, no. 10, pp. 1149-1154, Oct. 2013. https://doi.org/10.3938/NPSM.63.1149
  8. Guen-Hwan Ryu and Han-Youl Ryu, "Analysis of the Temperature Dependence of Phosphor Conversion Efficiency in White Light-Emitting Diodes," J. Opt. Soc. Korea, vol. 19, no. 3, pp. 311-316, Jun. 2015. https://doi.org/10.3807/JOSK.2015.19.3.311
  9. Hyo-Sung Lee, Byung-Ho Kim, Jong Hee Hwang, Tae-Young Lim, Jin-Ho Kim, Dae-Woo Jeon, Hyun- Suk Jung and Mi Jai Lee, "Optical Properties as Coating Process of Complex Phosphor for White LED," Korean J. Mater. Res., vol. 26, no. 1, pp. 22- 28, Jan. 2016. https://doi.org/10.3740/MRSK.2016.26.1.22
  10. Commission Internationale de l'Eclairage, CIE 177 Colour Rendering of White LED Light Sources, 2007.
  11. Wendy Davis and Yoshi Ohno, "Color Quality Scale," Opt. Eng., vol. 49, no. 3, 033602, Mar. 2010. https://doi.org/10.1117/1.3360335
  12. Illuminating Engineering Society of North America, IES TM-30-15 IES Method for Evaluating Light Source Color Rendition, 2015.
  13. Aurelien David, Paul T. Fini, Kevin W. Houser, Yoshi Ohno, Michael P. Royer, Kevin A. G. Smet, Minchen Wei and Lorne Whitehead, "Development of the IES Method for Evaluating the Color Rendition of Light Sources," Opt. Express, vol. 23, no. 12, pp. 15888- 15906, June. 2015. https://doi.org/10.1364/OE.23.015888