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研究生:蘇浚斌
研究生(外文):SU,CHUN-PIN
論文名稱:LED背光模組散熱分析
論文名稱(外文):The analysis of the heat dissipation of the backlight module of LEDs
指導教授:林大偉林大偉引用關係
指導教授(外文):LIN,DA-WEI
口試委員:林大偉杜翌群任春平
口試委員(外文):LIN,TA-WEITU,I-CHUNJEN,CHUN-PING
口試日期:2022-09-01
學位類別:碩士
校院名稱:國立臺南大學
系所名稱:機電系統工程研究所碩士班
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2022
畢業學年度:110
語文別:中文
論文頁數:48
中文關鍵詞:背光模組散熱風扇LED燈板對流熱傳非等溫流模型
外文關鍵詞:Backlight moduleCooling fanLED boardConvection heat transferNon-isothermal flow model
相關次數:
  • 被引用被引用:0
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  • 下載下載:24
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本研究之目的為模擬一背光模組之燈箱散熱,並探討及分析風扇對於燈箱內部的散熱影響。本研究之散熱模型根據某公司實際開發之背光模組,以實際之尺寸、熱源與風扇條件建立此模型。本研究之散熱模型將利用COMSOL多重物理量軟體之非等溫流模型與單向耦合建立。首先,初始模型之驗證以比較模擬結果,以建立一可靠之初始背光模組模型。繼而,再利用分析軟體調整四種散熱風扇配置以改善散熱效果,調整風扇高低位置、風扇配置方式、風扇風速、增加風扇數量去研究其對於散熱之影響,此研究能降低LED燈板溫度,改善壽命縮短與效能減少的問題發生。此次實驗針對風扇的配置與風速進行模擬測試,模擬結果發現將風速從1.988 m/s提升至15.9 m/s後,LED燈板表面最高溫度下降趨勢減緩,此時增加風速的散熱效果只剩下不到6%,從此結果得知風速提升至15.9 m/s以後提升風速的效益降低。研究將風扇從非對稱式改為對稱式,排列方式使用等間距,風速使用原設計3.975 m/s,最高溫度下降了6%,再將風扇高度從60 mm調整至70 mm,最高溫度又下降了2.9%,測試結果發現此風扇配置為較佳的散熱方式,LED燈板溫度是較佳的。此研究可以以更改風扇配置方式達到增加散熱效果, LED燈板因增加散熱效果達到延長壽命的效益,能使設備減少更換零件的成本,自動化檢測設備的背光模組在全球都是重要的存在,此研究能將背光模組節省許多環境資源,減少現在科技對環境的破壞,使人類與地球能夠有更好的共存方式。
The purpose of this study is to simulate the heat dissipation inside a light box of a backlight module, then to explore and analyze the effects. The heat dissipation model of this research is established with the actual size, heat source and fan conditions developed by a company. It will be established by using the non-isothermal flow model and unidirectional coupling of COMSOL multi-physics software. First, the verification of the initial model is performed to compare the simulation results to establish a reliable initial backlight module model. Then, use the analysis software to adjust the four cooling fan configurations to improve the effects by adjusting the height, configuration, speed of the fan. Finally, increase the number of fans to study its impact on heat dissipation. This study aims to reduce the temperature of the LED board and improve the problems of shortened lifespan and reduced efficiency.This experiment conducted a simulation test on the fan configuration and wind speed. The simulation results found that after increasing the wind speed from 1.988 m/s to 15.9 m/s, the downward trend of the maximum temperature on the surface of the LED light panel has slowed down. At this time, the cooling effect of increasing the wind speed is less than 6%. From this result, it can be seen that the benefit of increasing the wind speed decreases after the wind speed is increased to 15.9 m/s. In the study, when the fan was changed from asymmetrical to symmetrical, the arrangement was equidistant. Furthermore, the maximum temperature dropped by 6% when the wind speed used the original design of 3.975 m/s. In addition, the maximum temperature dropped to 2.9% when the height of the fan was adjusted from 60 mm to 70 mm. The results found that the above arrangement could show the better effects.The study can increase the heat dissipation effect by changing the fan configuration. And the LED board can prolong its lifespan because of the heat dissipation effect, which can reduce the cost of replacing parts for the equipment. The backlight module of automatic testing equipment is an important presence in the world. This research shows using the proper ways of backlight module can save a lot of environmental resources, reduce the damage to the environment caused by current technology, and enable humans and the earth to coexist properly.
目次
中文摘要 i
英文摘要 ii
致謝 iv
目次 v
表次 vi
圖次 vii
符號索引 viii
第一章 緒論 1
1-1 研究背景與動機 1
1-2 LED背光模組應用介紹 1
1-3 研究目的與文獻探討 2
1-4 論文大綱 3
第二章 理論分析與模型 4
2-1統御方程式 4
2-2背光模組模型介紹 4
2-3網格化模型 5
第三章 結果與討論 8
3-1研究方式與參數設定 9
3-2風扇風速對背光模組散熱之影響探討 9
3-3風扇高低位置對背光模組散熱之影響探討 9
3-4風扇配置對背光模組散熱之影響探討 10
3-5風扇數量對背光模組散熱之影響探討 10
3-6對稱式與非對稱式風扇對背光模組散熱之影響探討 10
第四章 結論與展望 32
參考文獻 33

[1]S.M.K. Mishra, V.P. Chandramohan, K. Balasubramanian, “Comparative study of cooling of automobile LED headlights without and with fins and finding comfortable operating conditions”, Archive of Mechanical Engineering, Vol. 66, pp. 295-314, 2019
[2]C. Chen, “LEDs for liquid crystal display (LCD) backlighting”, In Woodhead Publishing Series in Electronic and Optical Materials,Nitride Semiconductor Light-Emitting Diodes (LEDs) (Second Edition), Woodhead Publishing, pp. 619-646, ISBN 9780081019429, 2018
[3]M. Hamm, “Green lighting:analysing the potential for reduction of CO2-emissions
in full LED headlamps”, SAE Technical, Paper 2009-01-0058, 2009
[4]N. Narendran, Y. Gu, J.P. Freyssinier, H. Yu, L. Deng, “Solid-state lighting:failure analysis of white LEDs”, J Cryst Growth, Vol. 268, pp. 449-456, 2004
[5]A. Rammohan, C.R. Kumar, V.P Chandramohan, “Experimental analysis on estimating junction temperature and service life of high power LED array”, Microelectronics Reliability, Vol. 120, 114121, 2021
[6]J. Fan, K.C. Yung, M. Pecht, “Lifetime estimation of high-power white LED using
degradation-data-driven method”, IEEE Transactions on Device and Materials Reliability, Vol. 12, pp. 470-477, 2012
[7]T.R. Steiner, “High temperature steady-state experiment for computational radiative heat transfer validation using COMSOL and ANSYS”, Results in Engineering,Vol. 13, 100354, 2022
[8]V. Suarez, J. Hernández Wong, U. Nogal, A. Calderon, J.B. Rojas-Trigos, A.G. Juarez, E. Marin, “Study of the heat transfer in solids using infrared photothermal radiometry and simulation by COMSOL Multiphysics”, Applied Radiation and Isotopes, Vol. 83, Part C, pp. 260-263, 2014
[9]W. Wijayanti, Musyaroh, M.N. Sasongko, R. Kusumastuti, Sasmoko, “Modelling analysis of pyrolysis process with thermal effects by using COMSOL Multiphysics”, Case Studies in Thermal Engineering, Vol. 28, 101625, 2021
[10]C.H. Huang, G.J. Wang, “A design problem to estimate the optimal fin shape of LED lighting heat sinks”, International Journal of Heat and Mass Transfer, Vol. 106, pp.1205-1217, 2017
[11]S.H. Yu, K.S. Lee, S.J. Yook, “Optimum design of a radial heat sink under natural Convection”, International Journal of Heat and Mass Transfer, Vol. 54, Issues 11-12, pp. 2499-2505, 2011
[12]D. Jang, S.J. Yook, K.S. Lee, “Optimum design of a radial heat sink with a fin-height profile for high-power LED lighting applications”, Appl. Energy, 116, pp. 260-268, 2014
[13]K. Wang, X.X. Liu, Z.G. Shen, H.H. Duan, Q.S. Liu, Y.S. Wu, “A numerical study on the natural convective heat loss of an isothermal upward-facing cylindrical cavity”, Applied Thermal Engineering, Vol. 213, 118763, 2022
[14]C. Bunnagel, S. Monir, A. Sharp, A. Anuchin, O. Durieux, I. Uria, Y. Vagapov, “Forced air cooled heat sink with uniformly distributed temperature of power electronic modules”, Applied Thermal Engineering, Vol. 199, 117560, 2021
[15]B. Ramos-Alvarado, B. Feng, G.P. Peterson, “Comparison and optimization of single-phase liquid cooling devices for the heat dissipation of high-power LED arrays”, Applied Thermal Engineering, Vol. 59, Issues 1-2, pp. 648-659, 2013
[16]S.M. Sohel Murshed, C.A. Nieto de Castro, “A critical review of traditional and emerging techniques and fluids for electronics cooling”, Renewable and Sustainable Energy Reviews, Vol. 78, pp. 821-833, 2017
[17]B. Ramos-Alvarado, B. Feng, G.P. Peterson , “Comparison and optimization of single-phase liquid cooling devices for the heat dissipation of high-power LED arrays”, Applied Thermal Engineering, Vol. 59, Issues 1-2, pp. 648-659, 2013
[18]鄭澤明、曾憲中、王潮熏、黃欣雅,侷限空間效應對主動式LED 鰭片散熱座整體熱傳特性之影響,建國科技大學機械工程系研究所碩士論文,2016
[19]F. Afshari, M.A. Ceviz, E. Mandev, F. Yıldız, “Effect of heat exchanger base thickness and cooling fan on cooling performance of Air-To-Air thermoelectric refrigerator; experimental and numerical study”, Sustainable Energy Technologies and Assessments, Vol. 52, Part B, 102178, 2022
[20]H. Ma, N. Cai, L. Cai, F. Si, “Effects of the forced convection induced by assistant fans on the thermal performance of an indirect dry cooling system”, Case Studies in Thermal Engineering, Vol. 35, 102141, 2022

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