Phosphor-converted LED modeling by bidirectional photometric data

Chien Hsiang Hung, Chung-Hao Tien

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


For the phosphor-converted light-emitting diodes (pcLEDs), the interaction of the illuminating energy with the phosphor would not just behave as a simple wavelength-converting phenomenon, but also a function of various combinations of illumination and viewing geometries. This paper presents a methodology to characterize the converting and scattering mechanisms of the phosphor layer in the pcLEDs by the measured bidirectional scattering distribution functions (BSDFs). A commercially available pcLED with conformal phosphor coating was used to examine the validity of the proposed model. The close agreement with the measurement illustrates that the proposed characterization opens new perspectives for phosphor-based conversion and scattering feature for white lighting uses.

Original languageEnglish
Pages (from-to)A261-A271
JournalOptics Express
Issue numberS3
StatePublished - 21 Jun 2010

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