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研究生： 周清輝
Chou, Ching-Hui
論文名稱： 色序式驅動LED模組系統及色飽合度分析
Color-Sequential LED Driving System and Corresponding Color Saturation Analysis
指導教授： 周榮華
Chou, Jung-Hua
學位類別： 碩士
Master
系所名稱： 工學院 - 工程科學系碩士在職專班
Department of Engineering Science (on the job class)
論文出版年： 2009
畢業學年度： 97
語文別： 中文
論文頁數： 67
中文關鍵詞： 色序式 、發光二極體 、背光模組 、色飽合度 、直流驅動器
外文關鍵詞： backlight unit, converter, LED, color saturation, field sequential color
相關次數： 點閱：97  下載：0 
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    • 本論文研究主要以紅色、綠色、藍色發光二極體為背光模組的發光源，並配合液晶面板訊號，經由電腦介面控制來完成色序式驅動的顯示技術。
    色序式驅動系統配合LED背光模組，具有色彩飽合度高、驅動電壓低、反應速度快和無汞等優點，搭配面板作全彩顯示時，不需要彩色濾光片，可以提高面板光的穿透率，改善出光效率，保持高色彩飽合度。
    本論文也針對LED的電氣操作特性、光學特性及色飽合度進行探討及分析。在驅動方面，比較各直流驅動器的優缺點，並選擇最恰當的驅動器;而驅動器的迴授調光機制，則是以定電流脈波寬度調變驅動調光方式，最能符合以LED為背光源的調光控制方式。最後將整體實驗背光模組作散熱處理之後，改善色度偏移的情形。

    The thesis focuses on color sequential driving technique. In this study, we use red, green, and blue light emitting diodes (LEDs) as the light sources of an LCD backlight. We accomplish this technique by using a computer-controlled interface to control the LCD backlight via signals from the LCD panel.
    LED backlighting with color-sequential driving technique has many attractive advantages such as high color reproduction, low driving voltage, fast response and mercury free, etc. The most attractive one is the possibility to remove color filters (CF) which can enhance the light transmission from the LCD with a high color rendering. So, this technique plays an important role in LCD industry due to the possibility of realize low power consumption, vivid rendering, and fast response display.
    Analysis of electric, optical, and color properties of the LCD with this technique is conducted. For the driving circuit, we compare different DC driving systems and suggest a better one. The mechanism of feedback and dimming of light is by using the scheme of pulse width modulation (PWM) of the current. This is more suitable for the LCD backlighting with LEDs as the light source. Finally, we examine the color shift of the LED backlighting and minimize the color shift by proper thermal dissipation treatment.

    摘要....................................Ⅰ Abstract................................Ⅱ 誌謝....................................Ⅳ 目錄....................................Ⅴ 表目錄................................ⅠⅩ 圖目錄................................. Ⅹ 名詞說明..............................ⅩⅢ 符號說明..............................ⅩⅣ 第一章 緒論...........................1 1-1研究背景與動機.......................1 1-2文獻回顧.............................2 1-3論文架構.............................3 第二章 TFT-LCD液晶顯示器介紹..........5 2-1液晶顯示器之種類.....................6 2-2液晶之動作原理.......................7 2-3液晶顯示器之架構與操作方式..........10 2-3.1液晶顯示器之架構...........10 2-3.2液晶顯示器的操作方式.......11 第三章 LCD色彩顯示技術與LED背光源介紹..13 3-1液晶面板色彩顯示原理............13 3-1.1傳統液晶彩色顯示技術.......13 3-1.2色序法彩色顯示技術.........15 3-2 基礎色彩工程...................17 3-2.1觀測者配色函數.............18 3-2.2表色系統...................19 (1).物體色三刺激值(X、Y、Z)..19 (2).CIE 1931色度座標.........20 (3).CIE 1976色度座標.........21 (4).色飽合度.................23 3-3 LED特性介紹....................25 3-3.1電壓-電流特性..............27 3-3.2電流-光學特性..............28 3-4 LED驅動電源與調光機制..........30 第四章 LED背光源色序法驅動系統.........32 4-1色序法驅動原理..................32 4-2 LED背光模組驅動分析............36 4-2.1使用高頻交換式電源供應器之動機.36 4-2.2討論….........................40 4-3 LED背光模組驅動系統設計............41 4-3.1交換式電源供應器之原理.....42 4-3.2升壓型高頻直流轉換器...........43 4-3.3升壓型高頻直流轉換器之原理.....44 第五章 系統設計與量測結果.............48 5-1介面軟體規劃設計................49 5-1.1 色序法驅動訊號設計流程....50 5.2 介面控制軟體...................51 5-2.1 PC介面輸出功能驗證........51 5-3 類比控制電路設計...............53 5-4 硬體量測結果...................53 5-4.1 系統規格..................54 5-4.2 系統功能驗證..............54 5-5 LED模組光學驗證................59 5-5.1背光模組色純度.............59 5-5.2背板溫度和亮度、色度關係...59 5-5.3討論.......................60 第六章 結論與未來研究方向..............63 6-1結論.........................63 6-2未來研究方向.................64 參考文獻...............................65

    [1] C. P. Su, F. C. Lu, C. C. J. Chen, W. C. Lin, C. L. Liu, “Color-Filter Less RGB CCFL Backlight for Color Filed-Sequential LCD,” IDW, 2007, pp. 1471-1473.
    [2] Y. F. Chen, C. C. Chen, K. H. Chen, “Mixed Color Sequential Technique for High Contrast LCD With Optimum Power Consumption,” SID, 2007, pp. 134-137.
    [3] C. C. Tsai, W. C. Tai, C. N. Mo, C. L. Liu, “A 32-Inch Field Sequential Color OCB LCD with Dynamic Backlight Technology,” IDW, 2007, pp.1467-1479.
    [4]S. M. Wu, W. C. Lin, W.Y. Lo, H. W. Chen, C. N. Mo, “A Novel RGB LED Backlight System in 47 inch TFT-LCD,” IDMC, 2007, pp.261-264.
    [5] H. S. Hsieh, C. H. Chou, W. Y. Li, “Vivid Color and Clear Motion Picture 32-Inch TFT-LCD with Scan RGB LED Backlight,” IDMC, 2005, pp.622-624.
    [6] 王木俊、劉傳璽 著, “薄膜電晶體液晶顯示器-原理與實務”, 新文京, 2008.
    [7] 紀國鐘、鄭晃忠 著, “液晶顯示器技術手册”, 台灣電子材料與元件協會, 2002.
    [8] P. Yeh, C. Gu, “Optics of Liquid Crystal Displays,” Wiley ,1999.
    [9] E. Hecht, “OPTICS,” Addison Wesley, 2002.
    [10] 戴亞翔 著, “TFT-LCD 面板的驅動與設計,” 五南, 2006.
    [11] 大田登 著, 陳源興、陳詩涵 編譯, ”色彩工程學理論與應用,” 全華, 2007.
    [12] 史光國 著, ”半導體發光二極體及固體照明,” 全華, 2006.
    [13]S. O. Kasap原著，黃俊達、陳金嘉、楊奇達、雷伯勳 編譯, ”光電子學與光子學原理與應用,”全威, 2003.
    [14] EVERLIGHT, “61-136/REGHB7C-B01/ET Technical Data Sheet (Preliminary),” 2006.
    [15] E. Fred Schubert, “Light-Emitting Diodes Second Edition,” Cambridge
    University Press, 2006.
    [16] C. T. Kilian, “Modern Control Technology,” West, 1996.
    [17] A. Masood, “Driving Schemes for LED Backlighting Large-area LCD Displays,” SID, 2007, pp.308-311.
    [18] 梁適安 著, “交換式電供給器之理論與實務設計,” 全華, 2004.
    [19] TEXAS INSTRUMENTS, “Designing Switching Voltage Regulators with TL 494,” .
    [20] NATIONAL INSTRUMENT, “LabVIEW User Manual,” .
    [21] 謝勝治 著, ”圖控式程式語言,” 全華, 2003.

    [22] 山崎浩原 著, 溫榮弘 編譯, “Power MOSFET應用技術,” 全華, 2004.

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