A generalised thermal LED-model and its applications

IF 2.3 Q2 OPTICS

Advanced Optical Technologies Pub Date : 2022-06-30 DOI:10.1515/aot-2022-0017

Ruben Stahlbaum, L. Röhe, Martin Kleimeyer, B. Günther

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引用次数: 0

Abstract

Abstract Within 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.

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一种通用的热LED模型及其应用

摘要在过去的10年里，汽车外部照明的光源几乎完全转向了LED。由于是半导体器件，LED与白炽灯和氙气灯泡相比表现不同。本文推导了一个广义的热和几何LED模型。这获得了优势，因为数据表中提供的数据因制造商而异，甚至一个制造商的数据也不标准化。因此，在任何开发过程中都不容易将数据包含在内。在这种情况下，“模型”主要指一种计算过程。数据表中提供的数据往往需要数字化。从这些数字化数据中，建立了一个基于智能数据组合和多项式回归的模型。详细描述了该模型，并讨论了计算流体动力学（CFD）在模拟中的应用。在此过程中，建议进行几何简化。这种简化是以保持原始LED的热特性的方式进行的。该模型可以用于不同的应用，例如模拟和设计。它允许在虚拟开发阶段预测热状态和光输出，因为它固有地计算热功率和光输出。这可以导致对照明系统中的温度的更精确的估计以及对热流明的预测。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Optical Technologies OPTICS-

CiteScore

4.40

自引率

0.00%

发文量

期刊介绍： Advanced Optical Technologies is a strictly peer-reviewed scientific journal. The major aim of Advanced Optical Technologies is to publish recent progress in the fields of optical design, optical engineering, and optical manufacturing. Advanced Optical Technologies has a main focus on applied research and addresses scientists as well as experts in industrial research and development. Advanced Optical Technologies partners with the European Optical Society (EOS). All its 4.500+ members have free online access to the journal through their EOS member account. Topics: Optical design, Lithography, Opto-mechanical engineering, Illumination and lighting technology, Precision fabrication, Image sensor devices, Optical materials (polymer based, inorganic, crystalline/amorphous), Optical instruments in life science (biology, medicine, laboratories), Optical metrology, Optics in aerospace/defense, Simulation, interdisciplinary, Optics for astronomy, Standards, Consumer optics, Optical coatings.