A Al-Kamel, F M EL-Sharkawy, E M El-Moghazy
（Department of Photometry, National Instituted of Standard (NIS), Giza 12211-136, Egypt）
Abstract： The new standards for the photometric characterization of light-emitting diode (LED) sources and luminaries require the measurement evaluation of photometric and colorimetric quantities. This present work studies the performance of some types of LED light sources in different spectra and different color temperature for photometric and colorimetric applications. The study depends on mixed spectra of these different types of LEDs to enhance the color rendering index (CRI) to be near as possible to standard sources. Characterization of LED sources requires the evaluation of some photometric and colorimetric quantities such as luminous flux (), chromaticity coordinates (x,y) and (u′,v′), correlated color temperature (CCT) and color rending indices (CRI).
Key words： photometry; light-emitting diodoes (LEDs); chromaticity; color rendering indices
CLD number： TN312.8 Document code： A
Article ID： 1674-8042（2017）04-0364-07 doi： 10.3969/j.issn.1674-8042-2017-04-009
References
［1］Morris N. LED there be light, Nick Morris predicts a bright future for LEDs. 2015-03-17［2017-03-21］. http:∥www.electrooptics.com.
［2］Mills M P. The LED illumination revolution. Forbes, 2008.
［3］Press Release. 2014-10-07［2017-03-25］. https:∥www.nobelprize.org/.
［4］Comstock O, Jarzomski K. LED bulb efficiency expected to continue improving as cost declines. US Energy Information Administration, 2014.
［5］Wold J H, Valberg A. The derivation of XYZ tristimulus spaces: a comparison of two alternative methods. Color Research & Application, 2001, 26(S1): 222-224.
［6］Narendran N, Gu Y. Life of LED-based white light sources. Journal of Display Technology, 2005, 1(1): 167-171.
［7］El-moghazy E E M. A technical study of the development of working standard lamps for lighting applications. Cairo: Ein Shames University, 2012.
［8］LED color mixing: basics and background. Technical Article, CLD-AP38, Revision 2010, 1.
［9］CIE 17.4-1987 International lighting vocabulary. Geneve: Bureau Central de la Commission Electrotechnique Internationale, 1987.
［10］Embrechts J J. Color rendering of supplementary artificial lighting. Color Research & Application, 1992, 17(3): 197-204.
［11］Borbély A, Sámson A, Schanda J. The concept of correlated colour temperature revisited. Color Research & Application, 2001, 26(6): 450-457.
［12］Colour temperature, colour rendering and lumen efficiency. ［2017-04-15］. http:∥www.thegreenage.co.uk/tech/colour-temperature-colour-rendering-lumen-efficiency.
［13］The spectral distribution chart. ［2017-05-03］. http:∥www.eyelighting.com/resources/lighting-technology-education/general-lighting-basics/spectral-distribution-chart/.
发光二极管用于光度测量的表征和颜色增强
A Al-Kamel, F M EL-Sharkawy，E M El-Moghazy
（国家标准化研究所 光度测定研究所，吉萨 12211-136， 埃及）
摘要:发光二极管(LED)光源和发光体的光度测量表征的新标准要求光度和色度量的测量值。本文研究了不同光谱和不同色温下的一些LED光源在光度计和色度应用中的表现。这项研究依赖于这些不同类型的LED混合光谱来增强显色指数(CRI)，以尽可能接近标准源。LED光源表征需要一些光度和色度的评价数量，如光通量()，色度坐标(x,y)和(u′,v′)，相关色温(CCT)和显色指数(CRI)。
关键词:光度测量； 发光二极管；染色性；显色指数
引用格式：Al-Kamel A, EL-Sharkawy F M, El-Moghazy E M. Characterization and color rendering enhancement of some LEDs for photometric application. Journal of Measurement Science and Instrumentation, 2017, 8(4)： 364-370. ［doi： 10.3969／j.issn.1674-8042.2017-04-009］
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