Computational lighting by a LED-based system

Ming Chin Chien*, Chung-Hao Tien

*Corresponding author for this work

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

2 Scopus citations


A methodology analogous to a general lens design rule was proposed to step-by-step optimize the spectral power distribution (SPD) of a composite light-emitting diodes (LEDs) cluster. The computation is conducted for arbitrary SPD combination for the applications in radiometry, photometry and colorimetry, respectively. Based on the matrix computation, a spectrally tunable source is implemented to strategically manipulate the chromaticity, system efficiency and light quality according to all kinds of operational purposes. By the R/G/B/A/CW light engine with graphic utility interface, the cluster engine was experimentally validated to offer a wide-ranged operation in ambient temperature (Ta = 10°C to 100°C) with high color quality scale (CQS > 85 points) as well as high luminous efficiency (LE > 100 lm/watt) over the chromaticity point from 2800K to 8000K.

Original languageEnglish
Title of host publicationCurrent Developments in Lens Design and Optical Engineering XIII
StatePublished - 1 Dec 2012
EventCurrent Developments in Lens Design and Optical Engineering XIII - San Diego, CA, United States
Duration: 13 Aug 201215 Aug 2012

Publication series

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


ConferenceCurrent Developments in Lens Design and Optical Engineering XIII
Country/TerritoryUnited States
CitySan Diego, CA


  • Composite LEDs cluster
  • Computational lighting
  • SPD synthesis


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