Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Video

Updated: Jun 22, 2026

In Depth Analyses of LEDs by a Combination of X-ray Computed Tomography (CT) and Light Microscopy (LM) Correlated with Scanning Electron Microscopy (SEM)
10:42

In Depth Analyses of LEDs by a Combination of X-ray Computed Tomography (CT) and Light Microscopy (LM) Correlated with Scanning Electron Microscopy (SEM)

Published on: June 16, 2016

Precise optical model of multi-chip white LEDs.

Wei-Ting Chien, Ching-Cherng Sun, Ivan Moreno

    Optics Express
    |June 24, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    Snapshot 3D and texture imaging with structured illumination.

    Optics express·2026
    Same author

    Nonimaging optical design breaking the conventional symmetry of headlamp optics by side lighting with white LEDs.

    Scientific reports·2026
    Same author

    Volume hologram shrinkage dynamics and compensation strategies under long-term accelerated aging conditions.

    Applied optics·2026
    Same author

    Analysis and fabrication of a volume holographic optical element-based two-dimensional exit pupil expander.

    Applied optics·2026
    Same author

    Geometry-invariant optical properties of dielectric meta-atoms with antireflection coatings.

    Materials horizons·2026
    Same author

    Compact Design of a 50° Field of View Collimating Lens for Lightguide-Based Augmented Reality Glasses.

    Micromachines·2025

    This study reveals spatial emission variations in white light LEDs, improving optical models. New weighting factors enhance LED simulation accuracy beyond 99.5%.

    Area of Science:

    • Optoelectronics
    • Solid-state lighting
    • Optical engineering

    Background:

    • Current white light LED models often assume a homogeneous Lambertian light source for phosphor coatings.
    • This simplification leads to inaccuracies in optical simulations, particularly for multi-chip LEDs.
    • An unreported spatial distribution of emission spots within the phosphor layer causes these discrepancies.

    Purpose of the Study:

    • To develop a more accurate optical model for white light LEDs.
    • To address the limitations of the homogeneous Lambertian source assumption.
    • To incorporate the spatial emission characteristics of the phosphor layer into LED modeling.

    Main Methods:

    • Introduction of position-dependent "weighting" factors to account for varying light strength across the phosphor surface.

    More Related Videos

    Development of an Innovative LED-based Illumination Device for In Vitro Application of Photodynamic Therapy with Rose Bengal
    07:24

    Development of an Innovative LED-based Illumination Device for In Vitro Application of Photodynamic Therapy with Rose Bengal

    Published on: September 12, 2025

    Light Spot-Based Assay for Analysis of Drosophila Larval Phototaxis
    07:16

    Light Spot-Based Assay for Analysis of Drosophila Larval Phototaxis

    Published on: September 27, 2019

    Related Experiment Videos

    Last Updated: Jun 22, 2026

    In Depth Analyses of LEDs by a Combination of X-ray Computed Tomography (CT) and Light Microscopy (LM) Correlated with Scanning Electron Microscopy (SEM)
    10:42

    In Depth Analyses of LEDs by a Combination of X-ray Computed Tomography (CT) and Light Microscopy (LM) Correlated with Scanning Electron Microscopy (SEM)

    Published on: June 16, 2016

    Development of an Innovative LED-based Illumination Device for In Vitro Application of Photodynamic Therapy with Rose Bengal
    07:24

    Development of an Innovative LED-based Illumination Device for In Vitro Application of Photodynamic Therapy with Rose Bengal

    Published on: September 12, 2025

    Light Spot-Based Assay for Analysis of Drosophila Larval Phototaxis
    07:16

    Light Spot-Based Assay for Analysis of Drosophila Larval Phototaxis

    Published on: September 27, 2019

  • Development of a precise optical model using Monte Carlo ray tracing combined with these weighting factors.
  • Experimental measurement of LED radiation distribution at multiple distances to validate the model.

    • Main Results:

    • The developed model demonstrates significantly improved accuracy compared to traditional methods.
    • A normalized cross-correlation exceeding 99.5% was achieved between simulated and experimental radiation patterns.
    • The model accurately predicts LED radiation distribution across various distances.

    Conclusions:

    • The proposed model, incorporating spatial emission weighting, provides a precise and practical approach for simulating white light LEDs.
    • This method overcomes the inaccuracies associated with the homogeneous Lambertian source assumption.
    • The enhanced model is crucial for accurate optical design and performance prediction of multi-chip LEDs.