不同激發光螢光粉光學模型之分析

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姓名

郭冠廷(Kuan-Ting Kuo) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

不同激發光螢光粉光學模型之分析
(The analysis of different blue light sources for YAG phosphor model)

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摘要(中)

在本論文中，為了探討不同波長之激發光搭配YAG 螢光粉封裝成白光LED 的光學特性，因此建立了不同激發光YAG 螢光粉光學模型，而我們利用蒙地卡羅 (Monte-Carlo) 光追跡法結合米氏散射(Mie Scatter) 原理來模擬光線在YAG 螢光粉內的散射行為，並藉由二次光追跡來得到吸收係數和轉換效率。由於藍光經過YAG螢光粉後會發生形變，所以引入β參數結合螢光粉吸收頻譜來修正藍光頻譜形變的情形，並利用線性疊加的方式還原其頻譜，最後藉由實際半球封裝白光LED來驗證光學模型的準確性。

摘要(英)

In order to explore the property of white light LED, we build the phosphor model which is encapsulated with different LED wavelength. we use the Monte-Carlo ray tracing method with Mie scattering theory to simulate the scattering behavior in YAG phosphor, and obtain absorption coefficient and transfer efficiency by 2-nd ray tracing. Because the spectrum of blue light will distort by YAG phosphor, we introduced a coefficient β to compensate the distortion of blue light spectrum, and recover the original spectrum by superposition. At last, we verified the accuracy of model by experiment.

關鍵字(中)

★ 發光二極體
★ 螢光粉
★ 吸收係數
★ 轉換效率
★ YAG

關鍵字(英)

★ Phosphor
★ Absorption coefficient
★ Conversion efficiency
★ LED

論文目次

目錄
摘要 i
Abstract ii
致謝 iii
圖索引 ix
表索引 xvi
第一章緒論 1
1-1前言 1
1-2 LED發展背景 2
1-3研究動機與目的 7
1-4 論文大綱 9
第二章基本理論 10
2-1前言 10
2-2 LED發光原理 10
2-3 螢光粉發光原理 13
2-4 激發頻譜和發射頻譜 16
2-5 CIE 色度系統 17
第三章螢光粉光學模型之建立 20
3-1 前言 20
3-2 不同波長的吸收能力 21
3-3 散射模型 24
3-4 螢光粉的吸收參數 30
3-5螢光粉的轉換效率 47
第四章螢光粉光學模型之驗證 52
4-1 前言 52
4-2藍光頻譜 β修正 52
4-3 黃光頻譜 60
4-4 線性疊加 62
4-5 螢光粉模型驗證 64
第五章結論 81
參考文獻 83
中英文名詞對照表 89

參考文獻

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指導教授

楊宗勳、孫慶成
(Tsung-Hsun Yang、Ching-Cherng Sun)

審核日期

2012-8-21

推文