Print Email Facebook Twitter Junction temperature and luminous flux prediction for white LED array based on electrical-photo-thermal modeling Title Junction temperature and luminous flux prediction for white LED array based on electrical-photo-thermal modeling Author Liu, Minne (Fudan University) Li, Wenyu (Fudan University) Chen, Wei (Fudan University) Ibrahim, Mesfin S. (New Territories) Xiong, Jingkang (Changzhou Institute of Technology Research for Solid State Lighting) Zhang, Kouchi (TU Delft Electronic Components, Technology and Materials) Fan, Jiajie (Fudan University; Fudan Zhangjiang Institute; Chinese Academy of Sciences) Date 2024 Abstract During the operation of an LED array, its thermal and optical performances are always not equal to the superposition of the individual LED's characteristics because of a significant thermal coupling effect between the arrays. Based on this, this paper proposes an electrical–photo-thermal model, with considering both junction temperature and luminous flux, to predict the both the thermal and optical performances of LED arrays operated under different currents, case temperatures, and lighting methods. The junction temperature and luminous flux of a single LED operating under different driving currents and case temperature conditions are firstly collected to establish the luminous flux response surface model of a single chip. Then it is used to predict the luminous flux of an array, whose junction temperature is predicted using both thermal coupling matrix (TCM) and numerical models. Experiments verify the luminous flux of the LED array under different operation conditions and show that the proposed electrical–photo-thermal modeling can be used to predict the thermal and optical parameters of LED arrays with 95 % accuracy. Thus, it is effective for the fast prediction of the junction temperature and luminous flux of large LED systems with array structures, i.e. intelligent automotive lightings and displays. Subject Electrical-photo-thermal modelingJunction temperatureLight-emitting diodeLuminous fluxMultiple-chip arrayThermal coupling To reference this document use: http://resolver.tudelft.nl/uuid:79e91102-4da0-451a-bfc3-91a951d79d34 DOI https://doi.org/10.1016/j.csite.2023.103940 ISSN 2214-157X Source Case Studies in Thermal Engineering, 54 Part of collection Institutional Repository Document type journal article Rights © 2024 Minne Liu, Wenyu Li, Wei Chen, Mesfin S. Ibrahim, Jingkang Xiong, Kouchi Zhang, Jiajie Fan Files PDF 1-s2.0-S2214157X23012467-main.pdf 6.22 MB Close viewer /islandora/object/uuid:79e91102-4da0-451a-bfc3-91a951d79d34/datastream/OBJ/view