Junction temperature and luminous flux prediction for white LED array based on electrical-photo-thermal modeling
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,...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-02-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X23012467 |
| _version_ | 1827351313707433984 |
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| author | Minne Liu Wenyu Li Wei Chen Mesfin S. Ibrahim Jingkang Xiong Guoqi Zhang Jiajie Fan |
| author_facet | Minne Liu Wenyu Li Wei Chen Mesfin S. Ibrahim Jingkang Xiong Guoqi Zhang Jiajie Fan |
| author_sort | Minne Liu |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-08T02:01:24Z |
| format | Article |
| id | doaj.art-06e6a75f2ae542ad8b7ec1dd502ed669 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-03-08T02:01:24Z |
| publishDate | 2024-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-06e6a75f2ae542ad8b7ec1dd502ed6692024-02-14T05:16:44ZengElsevierCase Studies in Thermal Engineering2214-157X2024-02-0154103940Junction temperature and luminous flux prediction for white LED array based on electrical-photo-thermal modelingMinne Liu0Wenyu Li1Wei Chen2Mesfin S. Ibrahim3Jingkang Xiong4Guoqi Zhang5Jiajie Fan6Academy for Engineering & Technology, Fudan University, Shanghai, 200433, ChinaAcademy for Engineering & Technology, Fudan University, Shanghai, 200433, ChinaAcademy for Engineering & Technology, Fudan University, Shanghai, 200433, ChinaCentre for Advances in Reliability and Safety, New Territories, Hong KongChangzhou Institute of Technology Research for Solid State Lighting, Changzhou, 213164, ChinaDelft University of Technology, 2628, Delft, the NetherlandsAcademy for Engineering & Technology, Fudan University, Shanghai, 200433, China; State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China; Fudan Zhangjiang Institute, Shanghai, 201203, China; Corresponding author. Academy for Engineering & Technology, Fudan University, Shanghai, 200433, China.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.http://www.sciencedirect.com/science/article/pii/S2214157X23012467Light-emitting diodeMultiple-chip arrayJunction temperatureLuminous fluxThermal couplingElectrical-photo-thermal modeling |
| spellingShingle | Minne Liu Wenyu Li Wei Chen Mesfin S. Ibrahim Jingkang Xiong Guoqi Zhang Jiajie Fan Junction temperature and luminous flux prediction for white LED array based on electrical-photo-thermal modeling Case Studies in Thermal Engineering Light-emitting diode Multiple-chip array Junction temperature Luminous flux Thermal coupling Electrical-photo-thermal modeling |
| title | Junction temperature and luminous flux prediction for white LED array based on electrical-photo-thermal modeling |
| title_full | Junction temperature and luminous flux prediction for white LED array based on electrical-photo-thermal modeling |
| title_fullStr | Junction temperature and luminous flux prediction for white LED array based on electrical-photo-thermal modeling |
| title_full_unstemmed | Junction temperature and luminous flux prediction for white LED array based on electrical-photo-thermal modeling |
| title_short | Junction temperature and luminous flux prediction for white LED array based on electrical-photo-thermal modeling |
| title_sort | junction temperature and luminous flux prediction for white led array based on electrical photo thermal modeling |
| topic | Light-emitting diode Multiple-chip array Junction temperature Luminous flux Thermal coupling Electrical-photo-thermal modeling |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X23012467 |
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