探討新穎LED導光棒的V型微結構對出射光方向性之影響與設計

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姓名

林柏翰(Bo-Han Lin) 查詢紙本館藏

畢業系所

光機電工程研究所

論文名稱

探討新穎LED導光棒的V型微結構對出射光方向性之影響與設計
(The study and design of the V-grooves of the new type LED light guide bar relative to the illumination angle)

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摘要(中)

本研究以幾何光學為基礎，探討新穎LED導光棒的V型微結構對出射光方向性之影響，並提出一種V型微結構的設計概念。內容以使用反射片的導光棒為模型，搭配光學模擬軟體對導光棒進行設計，針對V型微結構的幾何參數相對於出射光角度及出射光強度分佈進行分析，藉此討論V型微結構的光學特性。綜合導光棒V型微結構參數之模擬結果，我們發現V型微結構的角度及密度參數，皆會影響出射光線的方向性，因此，對於導光棒的設計上，以出射光線的直向性與出射光強度分佈集中於正向角±25度區間為目標，調整出較佳的V型微結構角度和密度參數。
為了有效達到控制出射光方向及出射光均勻度的目的，我們提出一種特殊V型微結構組合的概念，考慮至少雙V型微結構組合為一基本導光微結構單元。在基本導光微結構單元的結構參數經過適當的設計後，再針對此導光微結構單元的分佈密度進行設計，以達到出射光均勻度的要求目標。光線經過適當分佈的導光微結構單元後，若和一般常用的V型微結構(底角皆為45度)相比，我們的設計至少可將於正向角±25度範圍內的出射光線能量提高10%，且主要出射光角度接近0度，而出射光強度分佈亦具對稱性。

摘要(英)

In this thesis, we integrated the LED light guide bar based on concave V-shaped grooves with reflective sheets which are demonstrated by using optical simulation software. We try to recommend the concepts of design after analyzing the geometric parameters of V-shaped grooves influence on the light emitting in the front direction and the illumination angle distribution.
The goal of this study is to propose a LED light guide bar model that is demonstrated to make the light emitting in the front direction, and the illumination angle distribution between ±25 with our designed using reflective sheets. After discussing the relationship between V-shaped grooves and the output light, we make at least a group of two V-shaped grooves as a micro-prism unit that are the same shape with density and angle. By using optical simulation software to control the distribution of illumination angle, the structure parameters of micro-prism unit and distribution are considered. It is found that the illumination angle of LED light guide bar is most concentrated within ±25 degrees.

關鍵字(中)

★ 導光棒
★ V型微結構
★ 出射光角度

關鍵字(英)

★ Light guide bar
★ V-grooves
★ Illumination angle

論文目次

摘要 i
Abstract ii
致謝 iii
圖目錄 vii
表目錄 x
第一章、緒論 1
1-1 研究背景 1
1-2 研究動機與目的 4
1-3 研究方法與流程 5
1-4 文獻回顧 6
1-5 章節概要 11
第二章、基本理論 12
2-1幾何光學基本原理與現象 12
2-2 光度量學 14
2-2-1立體角 14
2-2-2光通量 15
2-2-3發光強度 15
2-2-4配光曲線 16
2-2-5照度 16
2-2-6輝度 17
2-2-7朗伯餘弦定律 18
第三章、導光棒模型 19
3-1設計目標及流程 19
3-2 LED導光棒模型建立 20
3-2-1架構與參數 20
3-2-2 V型微結構參數介紹 22
3-3 V型微結構形狀的選擇 23
3-4調整出射光均勻性方式 25
3-5反射片和鍍反射膜模型之比較 26
第四章、V型微結構參數分析 29
4-1 V型微結構的高度參數 29
4-2 V型微結構的角度參數 40
4-3 V型微結構的密度參數 51
4-4 小結 59
第五章、出射光角度設計與分 60
5-1 V型微結構密度與角度的調整 61
5-2 V型微結構參數影響分析與討論 70
5-3導光棒均勻性設計 77
5-4概念應用 79
第六章、結論與未來展望 81
6-1結論 81
6-2未來展望 82
參考文獻與資料來源 83

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指導教授

陳奇夆(Chi-Feng Chen)

審核日期

2012-7-29

推文