多LED光源結構的精準光學模型之研究

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姓名

簡瑋廷(Wei-ting Chien) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

多LED光源結構的精準光學模型之研究
(The study of the precise optical model of multi-LEDs)

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摘要(中)

本論文主要著重在多LED 光源結構的精準光學模型之研究，我們將從
中場擬合法做延伸性的研究，討論光學模型其中場距離行為的限制，歸納
出準遠場距離約為LED 透鏡直徑的十倍。藉由中場距離的分析去修正傳統
模型法之誤差，我們使用光源強度權重法來建立一個多晶白光單一封裝
LED 光學模型，並在中場距離下做驗證此精準光學模型，相關係數達99.5%
以上。而後我們將討論擴散板之光學腔體效率，建立出LED 陣列搭配擴散
板之光學腔體快速計算效率之模型，並實際驗證該模型的準確性，其誤差
約在5%內。

摘要(英)

In this dissertation, we studied the precise optical model of multi-LEDs for different applications. We started from the mid-field algorithm to discuss the limitation of the midfield distance for optical model. In general, the quasi
far-field distance is about 5 to 10 times of the diameter of the encapsulated lens. Based on it, a weighting factor was proposed to modify the light source in the optical model of multi-chips white LED. This optical model was also verified in several midfield distances, and then a precise model of multi-chips white LED was successfully built up. The normalized correlation coefficient is higher than 99.5%.
Then we studied the efficiency of lighting cavities composed of LED arrays. A lighting cavity is a reflecting box with light sources inside, and its exit side is covered with a diffuser plate to mix and distribute light. We derived a simple but precise calculation model for the optical efficiency of diffuser plates attached to a light cavity. Finally, the model was demonstrated in different conditions experimentally. The error between calculation model and experiment is about 5% error.

關鍵字(中)

★ 腔體效率
★ 多晶白光
★ 中場
★ 光學模型

關鍵字(英)

★ mid-field
★ multi-chip
★ cavity efficiency
★ Optical model

論文目次

摘要..........................................................................................I
Abstract....................................................................................... II
致謝...........................................................................................III
目錄.............................................................................................IV
圖索引....................................................................................... VII
表索引.........................................................................................XI
第一章緒論................................................................................ 1
1.1 照明發展歷程................................................................................... 1
1.2 固態照明發展歷史........................................................................... 4
1.3 光學模型與設計............................................................................... 7
1.4 論文大綱........................................................................................... 9
第二章基本原理....................................................................... 10
2.1 光度學............................................................................................. 10
2.1.1 簡介........................................................................................... 10
2.1.2 光度計量................................................................................... 11
2.2 中場擬合法..................................................................................... 15
第三章中場擬合法之準遠場距離之探討............................... 19
3.1 研究動機......................................................................................... 19
3.2 遠場距離......................................................................................... 20
3.3 中場行為分析................................................................................. 24
3.3.1 封裝透鏡大小的影響................................................................ 25
3.3.2 晶片尺寸的影響........................................................................ 29
3.3.3 晶片位置或封裝製造誤差的影響............................................ 32
3.4 結論................................................................................................. 35
第四章多晶片單一封裝體之LED 光學模型........................ 36
4.1 研究動機......................................................................................... 36
4.2 多晶光源模型修正......................................................................... 38
4.3 光學模型驗證................................................................................. 42
4.4 結論................................................................................................. 45
第五章照明燈具腔體效率分析............................................... 47
5.1 研究動機......................................................................................... 47
5.2 含擴散板之光學腔體的結構......................................................... 49
5.3 等效入射角的計算......................................................................... 51
5.4 光學效率的計算............................................................................. 57
5.5 實驗驗證及比較............................................................................. 59
5.6 腔體幾何及LED 間距之影響...................................................... 64
5.7 結論................................................................................................. 66
第六章結論.............................................................................. 68
參考文獻..................................................................................... 70
中英對照表................................................................................. 74

參考文獻

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指導教授

孫慶成(Ching-cherng Sun)

審核日期

2010-7-27

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