應用於高畫質背投電視之發光二極體LCOS光機設計｜國立臺灣科技大學博碩士論文系統

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研究生：	蔡卲瑜 Shau-Yu Tsai
論文名稱：	應用於高畫質背投電視之發光二極體LCOS光機設計 LED Illuminated LCOS Light Engine for High Definition Rear Projection TV
指導教授：	陳政寰 Cheng-Huan Chen
口試委員:	林世穆 Shi-Mu Lin 黃忠偉 Jong-Woei Whang 蕭弘清 Hung-Ching, Hsiao 宗瑞瑤 Ruey-Yau Tzong
學位類別：	碩士 Master
系所名稱：	電資學院 - 電子工程系 Department of Electronic and Computer Engineering
論文出版年：	2005
畢業學年度：	93
語文別：	英文
論文頁數：	92
中文關鍵詞：	發光二極體、反射式液晶、色彩管理系統、高畫質電視
外文關鍵詞：	HDTV, Color management system, LCOS, LED
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本論文將設計一應用於高畫質背投電視設計之發光二極體單片式矽基型液晶投影光機，用以改善系統中之色彩飽和度、均勻度與對比度。此架構中包含多次混光機制，用以降低使用發光二極體陣列為光源之狀況下，因為個別發光單元間特性上之差異在面板上所造成照明不均勻的現象。此外；我們同時提出一個較為精簡的偏極轉換系統來取代傳統較為複雜的式樣。為了讓光機可運用於不同種類（三片式）的投影架構中，論文中亦提出一個創新的色彩管理系統- Z cubeTM，並可同時改善系統均勻度
在研究過程中，我們先以序列性光線追跡軟體(Zemax)來設計光機架構，再利用非序列性光線追跡軟體(TracePro)來評估系統效能，而雛形機即依照此規格來製作

In this thesis, a novel LED-based illumination optics and color management system, Z-cubeTM, has been proposed for improving the primary saturation, uniformity and contrast of single panel LCOS projection light engines applied in high definition rear projection TV. This novel light engine effective reduces the uniformity variation, which is resulted from the inconsistent performance of each LED, through multiple steps light mixing structure contained inside. Besides, for simplifying traditional polarization conversion system and various applications, a compact polarization conversion system and novel color management system are simultaneously proposed respectively. The working concept of the whole light engine is minutely described in the contents.
We use both sequential (Zemax) and non-sequential (TracePro) ray tracing program to design the proposed concept and evaluate optical performance respectively. While the practical work for the designed light engine will be finally carried out.

摘要..........................................................................I
Abstract……………………………………………………….	II
Acknowledgements	III
Contents……….	IV
List of Figure	VIII
List of Table	XIII
Chapter 1:	Introduction	1
1.1	Background	1
1.2	Objectives	1
1.3	Overview of this thesis	2
Chapter 2:	Projection Display	4
2.1	Color image generation of light valve projection system	6
2.1.1	Field sequential color scheme	7
2.1.2	Three channel color scheme	8
2.1.3	Sub-pixel color scheme	9
2.2	Transmissive projection system	10
2.3	Reflective projection system	14
2.3.1	LCOS projection system	15
2.3.2	DLP projection system	19
2.4	Basic architecture of LCOS projection system	21
2.4.1	Illumination system	22
(A) Light source	22
(B) Integrator	24
(C) Polarization conversion system	26
2.4.2	Color management system	27
(A) Single-panel system	27
(B) Three-panel system	28
2.4.3	Image system	29
Chapter 3:	Introduction to LED	30
3.1	Light generation mechanism	32
3.2	Optical characteristics of LED	37
3.2.1	Color for corresponding material	37
3.2.2	Viewing angle	38
3.2.3	Color purity and color gamut	39
3.2.4	Pulse width modulation and Color temperature	41
3.3	Primary issue	42
3.3.1	Thermal management	43
3.3.2	Internal quantum efficiency	43
3.3.3	External quantum efficiency	44
3.4	LED in Projector	47
Chapter 4:	Proposed architecture	49
4.1	Layout of light engine	49
4.2	Light source	50
4.3	Light mixing	52
4.3.1	First phase light mixing	53
4.3.2	Second phase light mixing	54
4.3.3	Compact polarization conversion system	54
4.3.4	Third phase light mixing	57
4.4	Novel color management system -- Z-cubeTM	59
Chapter 5:	Design and simulation of light engine	62
5.1	Light engine design in ZEMAX	62
5.1.1	Light source to first light pipe	62
5.1.2	PCS to panel	65
5.2	Performance verification in TracePro	66
5.2.1	LED model establishment in ray tracing program	66
(a) Reality model	67
(b) Simplified model	67
5.2.2	Other components	71
5.3	Simulation result	72
5.3.1	Ideal condition	72
5.3.2	Degenerate condition	73
Chapter 6:	Prototype and discussion	75
6.1	Prototype fabrication	75
6.1.1	LED module	76
6.1.2	Optical components and compact polarization conversion system	77
6.1.3	Z-cubeTM	79
6.2	Performance	80
6.3	Discussion	81
6.3.1	Inappropriate component	81
6.3.2	Optical design	82
6.3.3	LED Etendue	85
Chapter 7:	Conclusion and future work	87
Reference……………………………………………………..89
Publication…………………………………………………...93
Biography…………………………………………………….94

                                

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