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研究生： 蔡家壽
Chia-shou Tsai
論文名稱： 高功率穿透式液晶顯示投影機之設計
High-Power Transmissive Liquid Crystal Display Projector Design
指導教授： 廖顯奎
Shien-Kuei Liaw
口試委員: 張嘉男
Chia-nan Chang
徐桂珠
Kuei chu Hsu
吳文方
Wen-fang Wu
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： 2011
畢業學年度： 99
語文別： 中文
論文頁數： 85
中文關鍵詞： 發光二極體 、反射罩 、積分柱 、液晶顯示器 、投影機鏡頭
外文關鍵詞： LED, reflector, integral column, liquid crystal display, projector lens
相關次數： 點閱：176  下載：2 
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    • 　　本論文提出高功率穿透式液晶顯示投影機設計，我們將利用光學模擬軟體FRED進行投影機的設計，投影機系統可分為集光系統與投射系統，在集光系統部分，考慮使用一反射罩將高功率發光二極體(紅、綠、藍光)所發出的光線進行收斂，反射罩的種類有兩種，首先是方型反射罩，利用幾何光學的原理進行設計，而模擬結果在輸出光形上表現相當優異，但隨著投射距離的提高，其輸出的功率會降低以及光形會變形，而後考慮第二種為拋物面反射罩，藉由將光源放置在拋物面反射罩的焦點，可將光源打在拋物面上的光線反射成平行光，有效改善隨著投射距離的提高造成品質下降的問題，光線再經由偏振片修正極化方向，使其為單一方向偏振光再經由X-cube分光稜鏡反射或穿透將三原色光源匯集，之後再由聚焦透鏡將光源收斂至積分柱。
    　　投射系統的部分，採用專門設計透鏡的OSLO光學模擬軟體，利用軟體將本實驗需要投影鏡頭設計，且經過優化的投影透鏡組各種像差皆能有效被改善，利用FRED光學模擬軟體將OSLO的透鏡組資料匯入，便完成整體穿透式液晶顯式投影機架構，依尺寸類型分為微型與中型投影機，透過模擬描光處理，將光線經由投影系統至偵測屏幕，分析其模擬結果得到該投影機的輸出流明值與均勻度，微型投影機的輸出流明值為93 lm 以上，均勻度則是72.8，中型投影機的輸出流明值為260 lm 以上，均勻度則是47.9，且微型投影機整體體積僅為15 cm × 7.5 cm × 2.5 cm，符合現今產品趨勢之便宜、輕巧、便攜，未來市場是相當被看好的。

    　　This thesis proposed high-power transmitted liquid crystal display projector design. The optical simulation software FRED is used to design the projector. The projector system can be divided into light collection system and light projection system. For the light collection system, a reflector is used converge the emitting light of three (in red, green and blue color) high-power light emitted diodes (LEDs). Two types of reflectors are considered. For the square shape reflector, the simulation is based on principles of geometric optics and the simulation results are quite good. However, the power decays tremendously and the pattern is also gradually distorted as the projection distance increases. For the parabolic shape reflector, the LED is located at the focal point of the reflector. Then the reflective light beams would be transmitted in parallel with one another. So, the problem of pattern distortion will be overcome even the distance is increased. The optical beams could be further amended by a polarizer before the red, green and blue LEDs are combined by the X-cube prism, which may either reflect or transmit the coming LED light beams. Finally, the light beams will be converged in to an integral column by the convex lens.
    　　For the projection system, the optical simulation software OSLO is used. It is a powerful tool for design optical lens. In the beginning, the OSLO is used to design projection lens of the experimental frame, then all the projection lens’ parameters could be optimized. We use the optical simulation software FRED to design the import projection lens parameters, then the optimum transmissive projector configuration is obtained. In this thesis we discuss both size projector and medium-sized projector. By the ray tracing simulation processing, the light could project onto the detection screen. Then we analyze the simulation results to obtain the lumen defined by the American national standard institute (ANSI) and its uniformity of the projector. The value for the mini-size projector is above 93 lm and uniformity is 72.8, while that for the middle-size projector is above 260 and 47.9, respectively. The dimension for the mini-size projector is 15 cm × 7.5 cm × 2.5 cm. The later is compact, portable and low-cost and fits the commercial trend in future market.

    摘要.....................................................Ⅰ Abstract.................................................Ⅱ 誌謝.....................................................Ⅲ 目錄.....................................................Ⅳ 圖表索引.................................................Ⅶ 第一章緒論............................................1 1.1前言............................................1 1.2研究動機與目的..................................2 1.3論文架構........................................3 第二章光學概論與投影機原理............................4 2.1幾何光學........................................4 2.1.1 光的反射定律....................................4 2.1.2 光的折射定律....................................5 2.1.3 全反射..........................................6 2.2成像原理........................................7 2.2.1 色差............................................7 2.2.2 球面像差........................................8 2.2.3 彗型像差........................................8 2.2.4 畸變............................................9 2.3非成像原理.....................................10 2.3.1 光通量.........................................10 2.3.2 發光強度.......................................11 2.3.3 照度...........................................12 2.3.4 亮度...........................................13 2.4投影機的原理...................................13 2.4.1 數位光處理(DLP)投影系統........................14 2.4.2 穿透式液晶(LCD)投影機..........................16 2.4.3 反射式液晶(LCoS)投影機.........................17 第三章光學設計流程...................................20 3.1光學模擬軟體FRED...............................20 3.2投影機架構.....................................20 3.3發光二極體 (LED)...............................23 3.3.1 高功率LED系列..................................23 3.3.2 LED散熱模組....................................25 3.4偏振片 (Polarizer).............................26 3.5X型分光稜鏡 (X-cube prism).....................28 3.6液晶顯示器模組 (LCD module)....................30 第四章穿透式LCD投影機之集光系統......................33 4.1方形反射罩.....................................33 4.1.1 方形反射罩設計.................................33 4.1.2 方形反射罩結果與分析...........................34 4.2拋物面反射罩...................................37 4.2.1 拋物面反射罩設計...............................37 4.2.2 拋物面反射罩結果與分析.........................40 4.3積分柱.........................................46 4.3.1 積分柱設計.....................................46 4.3.2 積分柱結果及分析...............................47 第五章穿透式LCD投影機之投射系統......................51 5.1光學模擬軟體OSLO...............................51 5.2投影透鏡組的設計...............................52 5.2.1 投影透鏡組A的設計..............................52 5.2.2 投影透鏡組B的設計..............................55 5.3微型投影機的結果與分析.........................59 第六章中尺寸穿透式LCD投影機設計......................68 6.1中型投影機系統架構.............................68 6.2中型投影機之集光系統...........................69 6.2.1 中型投影機之拋物面反射罩設計...................69 6.2.2 中型投影機之積分柱設計.........................70 6.3中型投影機之投射系統...........................72 6.3.1 中型投影透鏡組的設計...........................72 6.3.2 中型投影機的結果與分析.........................75 6.4微型與中型投影機之分析與比較...................78 第七章結論與未來展望.................................80 7.1結論...........................................80 7.2未來展望.......................................81 參考文獻................................................82

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