Packaging efficiency analysis of phosphor-converted white LEDs

Ching Cherng Sun, Yu Yu Chang, Cheng Chien Chen, Ching Yi Chen, Tsung Hsun Yang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, we present our study in packaging efficiency for phosphor-converted white LED (pcW-LED). Then the limit of luminous efficacy of a pcW-LED in different types of packaging is estimated. In the calculation, the EQE of the blue die is assumed 81% and the Stokes loss is counted, we obtain the limit of luminous efficacy, which reaches 300 lm/W, when the color appearance is green-white and the corresponding CCT is between 4000K to 5000K. More consideration for practical limit take consideration of phosphor quantum loss and geometry loss, and the limit of luminous for CRI around 60 is around 240 lm/W, and for CRI larger than 80 is around 175 lm/W.

Original languageEnglish
Title of host publicationCurrent Developments in Lens Design and Optical Engineering XV
EditorsVirendra N. Mahajan, R. Barry Johnson, Virendra N. Mahajan, Simon Thibault
PublisherSPIE
ISBN (Electronic)9781628412192
DOIs
StatePublished - 2014
EventCurrent Developments in Lens Design and Optical Engineering XV - San Diego, United States
Duration: 18 Aug 201420 Aug 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9192
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceCurrent Developments in Lens Design and Optical Engineering XV
Country/TerritoryUnited States
CitySan Diego
Period18/08/1420/08/14

Keywords

  • luminous efficacy
  • Packaging efficiency
  • phosphor converted
  • white LED

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