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http://dx.doi.org/10.5207/JIEIE.2011.25.11.026

Development of LED Alternative to Standard Illuminant A Using Emission Spectrum Control  

Cho, Jae-Hyun (경기대학교 신소재공학과)
Jang, Min-Suk (한국광기술원 신광원조명사업단)
Kim, Dong-Won (경기대학교 신소재공학과)
Kim, Wan-Ho (한국광기술원 신광원조명사업단)
Kim, Gi-Hoon (한국광기술원 신광원조명사업단)
Kim, Kang-Woong ((주)티앤아이)
Song, Sang-Bin (한국광기술원 신광원조명사업단)
Kim, Jae-Pil (한국광기술원 신광원조명사업단)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.25, no.11, 2011 , pp. 26-32 More about this Journal
Abstract
In this study, a standard illuminant A type LED that has similar emission spectrum as the standard illuminant A was developed using LED chip(emission peak: 405[nm]) and four types of phosphors(blue, green orangered and red). Using the design of experiment for spectrum control, the trend of the change of spectrum shape influenced by the change of interaction among phosphors and their density could be examined. Computer simulation through the optimization of the design of experiment revealed that, among four phosphors, the most influential one on the shape of the spectrum was green phosphor. Using the obtained optimal combination ratio of the four phosphors, an alternative LED illuminant to the actual standard illuminant A was developed and the spectrums of these two were confirmed identical. Using this standard illuminant A type LED, a portable transmittance meter with the range of measurement error of ${\pm}1.0$[%] was developed.
Keywords
Standard Illuminant A; LED; Phosphor; Emission Spectrum; Design of Experiment;
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