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

  • 제27권4호
  • /
  • Pages.1-7
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  • 2013
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  • 1229-4691(pISSN)
  • /
  • 2287-5034(eISSN)
한국조명전기설비학회 (The Korean Institute of IIIuminating and Electrical Installation Engineers)
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가압성형 방식을 사용한 렌즈 일체형 LED 패키지의 색온도 균일성 향상에 관한 연구

Improvement of Color Temperature Uniformity of Integrated Optic Lens Type LED Packaged using Compression Molding Method

  • 김완호 (전남대학교 전기공학과) ;
  • 강영래 (한국광기술원 신광원조명사업단) ;
  • 장민석 (한국광기술원 신광원조명사업단) ;
  • 주재영 (한국광기술원 신광원조명사업단) ;
  • 송상빈 (한국광기술원 신광원조명사업단) ;
  • 김재필 (한국광기술원 신광원조명사업단) ;
  • 여인선 (전남대학교 전기공학과)
  • 투고 : 2012.11.27
  • 심사 : 2013.02.22
  • 발행 : 2013.04.30
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초록

Optical characteristics including the view angle and color temperature uniformity of LED packages with an integrated lens fabricated by compression molding method are investigated according to lens shape, lens materials, and phosphor coating methods. Four types of lens shape are designed and their optical output power dependence on the refractive index of silicone encapsulant are evaluated. Also, spatial color temperature uniformities of packages fabricated with different phosphor coating methods-direct coating on a chip vs. uniformly mixed with silicone encapsulant- are compared at various view angles. As the result, it is found that phosphor coating method is more effective on color temperature uniformity than lens shape. The maximum color temperature difference of a package with direct coating of phosphor on a chip is 1,340K according to the view angle at the color temperature of 5,000K, and that of a package with uniformly mixed phosphor is 250K, which indicates 1,090K improvement of color uniformity for the latter case.

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참고문헌

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