Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

A generalised thermal LED-model and its applications

A generalised thermal LED-model and its applications AbstractWithin the last 10 years the illuminants for automotive exterior lighting shifted nearly completely to LEDs. Due to being semiconductor devices, LEDs behave differently compared to incandescent lamps and xenon bulbs. The paper derives a generalized thermal and geometric LED model. This gains advantage because the data provided in data sheets is different from manufacturer to manufacturer and even from one manufacturer the data is not standardized. So the data is not prepared to be included easily in any development process. In this context “model” mainly refers to a calculation procedure. The data provided in data sheets often has to be digitized. Outgoing from this digitized data a model, based on a smart data combination and polynomial regression, is built up. This model is described in detail and an application to simulations by means of computational fluid dynamics (CFD) is discussed. In doing so a geometric simplification is suggested. This simplification is done in a manner to keep the thermal characteristic of the original LED. The model may be used in different applications such as simulations and design. It allows predicting the thermal status and light output during a virtual development phase, because it inherently calculates the thermal power and light output. This may lead to a more precise estimation of temperatures in lighting systems as well as a prediction of hot lumens. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Advanced Optical Technologies de Gruyter

A generalised thermal LED-model and its applications

Loading next page...
 
/lp/de-gruyter/a-generalised-thermal-led-model-and-its-applications-d9sy6KRMZj

References (9)

Publisher
de Gruyter
Copyright
© 2022 Walter de Gruyter GmbH, Berlin/Boston
ISSN
2192-8584
eISSN
2192-8584
DOI
10.1515/aot-2022-0017
Publisher site
See Article on Publisher Site

Abstract

AbstractWithin the last 10 years the illuminants for automotive exterior lighting shifted nearly completely to LEDs. Due to being semiconductor devices, LEDs behave differently compared to incandescent lamps and xenon bulbs. The paper derives a generalized thermal and geometric LED model. This gains advantage because the data provided in data sheets is different from manufacturer to manufacturer and even from one manufacturer the data is not standardized. So the data is not prepared to be included easily in any development process. In this context “model” mainly refers to a calculation procedure. The data provided in data sheets often has to be digitized. Outgoing from this digitized data a model, based on a smart data combination and polynomial regression, is built up. This model is described in detail and an application to simulations by means of computational fluid dynamics (CFD) is discussed. In doing so a geometric simplification is suggested. This simplification is done in a manner to keep the thermal characteristic of the original LED. The model may be used in different applications such as simulations and design. It allows predicting the thermal status and light output during a virtual development phase, because it inherently calculates the thermal power and light output. This may lead to a more precise estimation of temperatures in lighting systems as well as a prediction of hot lumens.

Journal

Advanced Optical Technologiesde Gruyter

Published: Dec 1, 2022

Keywords: CFD; colour shift; hot lumens; LED model; thermal degradation

There are no references for this article.