Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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Development of LED Alternative to Standard Illuminant A Using Emission Spectrum Control

발광 스펙트럼 제어를 통한 표준광원 A 대체형 LED 개발

  • 조재현 (경기대학교 신소재공학과) ;
  • 장민석 (한국광기술원 신광원조명사업단) ;
  • 김동원 (경기대학교 신소재공학과) ;
  • 김완호 (한국광기술원 신광원조명사업단) ;
  • 김기훈 (한국광기술원 신광원조명사업단) ;
  • 김강웅 ((주)티앤아이) ;
  • 송상빈 (한국광기술원 신광원조명사업단) ;
  • 김재필 (한국광기술원 신광원조명사업단)
  • Received : 2011.09.22
  • Accepted : 2011.10.14
  • Published : 2011.11.30
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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.

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