Title page for 972212001


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Student Number 972212001
Author Shuang-hao Yang(楊双豪)
Author's Email Address yshaur@gmail.com
Statistics This thesis had been viewed 592 times. Download 230 times.
Department Optics and Photonics
Year 2009
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title Study of High-Directional LED with External Cavity
Date of Defense 2010-07-01
Page Count 102
Keyword
  • Étendue
  • Coupling Efficiency
  • Photon Recycle
  • Surface Texture
  • ThinGaN LED
  • Abstract In this thesis, we incorporate an external cavity with the surface texture for ThinGaN LEDs to obtain a high-directional light source. First of all, we measure the geometric structure on the top surface of ThinGaN LEDs and the characteristic of optical parameters. According to the information, we build up a precise optical model of ThinGaN LED to design an external cavity with special light cone of 30°, which is different from 90° of general LEDs. The output coupling efficiency, enhancement ratio, and spatial distribution are analyzed. Finally, we compare the experiment results with the simulation, and the characteristic of the new light source is discussed.
    Table of Content 摘要 ........................................................................................................................ I
    目錄 ..................................................................................................................... IV
    圖索引 ................................................................................................................ VII
    表索引 ................................................................................................................ XII
    第一章 緒論 ...................................................................................................... 1
    1-1 前言 ...................................................................................................... 1
    1-2 LED 的發展概況 ................................................................................. 2
    1-3 LED 於高指向性光源之應用 ............................................................. 5
    1-4 論文大綱 .............................................................................................. 7
    第二章 基本原理介紹 ......................................................................................... 8
    2-1 LED 發光原理 ..................................................................................... 8
    2-2 LED 發光效率 ................................................................................... 11
    2-2-1 LED 內部量子效率................................................................. 13
    2-2-2 LED 光萃取效率 ..................................................................... 15
    2-3 薄膜型LED 發光效率之提升 .......................................................... 19
    2-4 LED 之指向性 ................................................................................... 23
    V
    第三章 高指向性LED 光源模型的建立 ......................................................... 28
    3-1 光子回收機制之先前技術 ................................................................ 28
    3-2 高指向性光源機構之設計概念 ........................................................ 29
    3-3 ThinGaN LED 光學模型之建立與驗證 ........................................... 32
    3-3-1 蒙地卡羅光線追跡法 ............................................................. 32
    3-3-2 ThinGaN LED 光學模型與模擬參數 ................................... 34
    3-3-3 ThinGaN LED 表面微結構之建立 ....................................... 36
    3-3-4 光學模型驗證 ......................................................................... 40
    第四章 高指向性光源機構之設計 ................................................................... 44
    4-1 初階設計與模擬參數 ......................................................................... 44
    4-2 初階設計之分析與實作 .................................................................... 47
    4-2-1 肉厚對反射杯之影響 ............................................................. 47
    4-2-2 反射杯之模型設計 ................................................................. 53
    4-2-3 出光耦合效率、能量提昇率和散角分佈圖 ......................... 56
    4-3 反射杯之反射率量測 ........................................................................ 70
    4-4 反射杯之散射效應 ............................................................................ 75
    VI
    第五章 結論 ....................................................................................................... 82
    參考文獻 ............................................................................................................. 84
    中英文名詞對照表 ....................................................................................... 87
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    Advisor
  • Ching-Cherng Sun(孫慶成)
  • Files
  • 972212001.pdf
  • approve in 2 years
    Date of Submission 2010-07-29

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