藍光LED分別激發紅、綠、黃之單色螢光粉光學模擬研究與照明應用

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陳仁傑(Ren-Jie Chen) 查詢紙本館藏

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照明與顯示科技研究所

論文名稱

藍光LED分別激發紅、綠、黃之單色螢光粉光學模擬研究與照明應用

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摘要(中)

本論文是使用LightTools光學軟體建立螢光粉之光學模型。首先分別以配光曲線儀與積分球量測藍光LED之配光曲線與光譜;其次建立紅、綠、黃之三種螢光粉光學模型，先以雷射粒徑分析儀分別量測紅、綠、黃螢光粉粒徑分佈與光譜儀量測此三種螢光粉之激發光譜與發射光譜等參數，將藍光LED配光曲線與光譜，螢光粉粒徑分佈、激發光譜、發射光譜，分別輸入LightTools軟體內，利用蒙地卡羅 (Monte-Carlo)法來模擬米氏散射 (Mie scattering)與光線追跡。再進一步計算螢光粉模型之吸收及輻射光線之特性。並針對藍光LED分別激發紅、綠螢光粉在不同重量百分濃度下進行實驗與模擬之輻射功率光譜分佈驗證，可達到歸一化相關係數(NCC) 0.9以上。並設計藍光LED激發黃色螢光粉之白光光源在4000K色點條件下之四種封裝模型，分析其螢光粉用量及出光效率，並應用在筒燈上照明分析。

摘要(英)

This paper is using optical software LightTools to building a optical phosphor model.First,using light distribution curve instrument and integrating sphere to measure luminous intensity distribution curve and spectrum of blue LED, following, establish red, green ,yellow three kinds of optical phosphor model;using laser diffraction submicron partical size analyzer measure partical size distribution of phosphor,then ,using photon spectra luminous meter measure excitation and emission spectra and other spectra parameters of these three kinds of phosphor respectively.And input following data to LightTools respectively : luminous intensity distribution curve and spectrum of blue LED ,partical size distribution,excitation and emission spectrum,using Monte-Carlo method to simulate ray tracing with Mie scattering theory, advanced calculate the behavior of absorption and radiation of phosphor .In simulation and experiment ,against blue LED inspiring red ,green phosphor in different concentration verify spectrum distribution,reach normalized correlation coefficient (NCC) above 0.9. Design blue LED inspiring yellow phosphor to conform white source ,in condition color temperature 4000K, comparing four kinds of different package model,analyze its phosphor quantity and luminous efficiency,and applied in downlight illumination analysis.

關鍵字(中)

★ 螢光粉
★ 發光二極體
★ 吸收光譜
★ 發射光譜
★ 米氏散射

關鍵字(英)

★ phospohr
★ LED
★ absorption spectrum
★ emission spectrum
★ Mie scattering

論文目次

摘要 i
Abstract ii
致謝 iii
目錄 iv
圖目錄 vii
表目錄 xiv
第一章緒論 1
1-1 引言 1
1-2 LED背景 2
1-3 研究動機與目的 4
1-4 論文大綱 4
第二章基本原理 6
2-1 引言 6
2-2 LED發光原理 6
2-3 螢光粉發光原理 8
2-4 LED能量轉換過程 11
2-5 光度學 14
2-6 色彩學 15
2-6-1 色度學 15
2-6-2 黑體輻射與色溫 18
2-7 粒子散射 23
2-7-1 米氏散射 25
2-7-2 平均自由路徑 25
第三章螢光粉模型之建立 27
3-1 引言 27
3-2 螢光粉光源模型之建立 28
3-3 螢光粉模型之吸收光譜與激發光譜 32
3-4 螢光粉模型之量子產率 36
3-5 螢光粉模型之發射光譜 36
3-6 史塔克損耗(Stoke loss) 37
3-7 螢光粉粒子模型 39
3-8 螢光粉模型之能量轉換關係 41
第四章 LED封裝與LED燈具之驗證與分析 44
4-1 引言 44
4-2 螢光粉光學模型之驗證與分析 44
4-2-1 R-645螢光粉之光譜 49
4-2-2 R-645螢光粉不同濃度之模擬光譜與實測光譜比較 52
4-2-3 R-645螢光粉不同濃度之色座標比較 54
4-2-4 R-626螢光粉之光譜 56
4-2-5 R-626螢光粉不同濃度之模擬光譜與實測光譜比較 58
4-2-6 R-626螢光粉不同濃度之色座標比較 61
4-2-7 紅粉R-645、R-626模擬結果分析 64
4-2-8 G-529螢光粉之光譜 66
4-2-9 G-529螢光粉不同濃度之模擬光譜與實測光譜比較 68
4-2-10 G-529螢光粉不同濃度之色座標比較 70
4-2-11 G-531螢光粉之光譜 73
4-2-12 G-531螢光粉不同濃度之模擬光譜與實測光譜比較 76
4-2-13 G-531螢光粉不同濃度之色座標比較 77
4-2-14 綠粉G-529、G-531模擬結果分析 81
4-3 固定色座標下不同膠體封裝方式之影響 82
4-3-1 固定色點下不同膠體封裝型式之模擬 84
4-3-2 固定色點下不同膠體封裝型式之模擬結果與分析 86
4-4 LED燈具之模擬與應用 91
4-4-1 LED燈具之模擬結果與分析 95
第五章結論 98
參考資料 99

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指導教授

孫文信(Wen-Shing Sun)

審核日期

2013-7-29

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