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Energy Express

Energy Express

  • Editor: Bernard Kippelen
  • Vol. 18, Iss. S3 — Sep. 13, 2010
  • pp: A261–A271

Phosphor-converted LED modeling by bidirectional photometric data

Chien-Hsiang Hung and Chung-Hao Tien  »View Author Affiliations


Optics Express, Vol. 18, Issue S3, pp. A261-A271 (2010)
http://dx.doi.org/10.1364/OE.18.00A261


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Abstract

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.

© 2010 OSA

OCIS Codes
(120.5820) Instrumentation, measurement, and metrology : Scattering measurements
(230.3670) Optical devices : Light-emitting diodes
(290.1483) Scattering : BSDF, BRDF, and BTDF

ToC Category:
Light-Emitting Diodes

History
Original Manuscript: February 11, 2010
Revised Manuscript: May 21, 2010
Manuscript Accepted: June 7, 2010
Published: June 24, 2010

Citation
Chien-Hsiang Hung and Chung-Hao Tien, "Phosphor-converted LED modeling by bidirectional photometric data," Opt. Express 18, A261-A271 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-S3-A261


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