顯示器中廣色域混色模式之研究

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姓名

張宏志(Hung-Chih Chang) 查詢紙本館藏

畢業系所

光電科學研究所碩士在職專班

論文名稱

顯示器中廣色域混色模式之研究
(Study of Color Mixing Method for Wide Gamut Display)

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摘要(中)

近年來LCD顯示器不斷發展，廠商積極的投入資源，LCD顯示器的設計作法也投入新的思維，顯示器的產品一直走向更清晰的影像，更逼真的色彩。我們瀏覽探索了不同的新技術，進一步設計了一個可以調變背光顏色的LCD顯示器光學系統，在這個新設計當中，我們儘量維持現有的顯示器架構，僅做少部份的必要改變，以相容於既有的生產程序。
在研究過程中，基於量測所得的光譜做分析發現，彩色濾光片三主色的穿透率光譜會有很大的重疊區域，這是造成顏色飽和度不佳的主要原因，而且其中藍色與綠色的穿透率光譜會有較大的重疊區域。所以，我們以時序分工(time sharing)的設計，提出一個新穎的分色作法，以不同的主色分色和背光光源的同時控制，將彩色濾光片的缺點避開。我們認為這樣是可行性高的設計。將此設計實作完成之後，以實驗量測加以印證，有效地得到一個色域增大百分之二十的廣色域混色模式。

摘要(英)

In recent years, the intensive development of liquid-crystal displays (LCDs) has been creating much clearer images and much more vivid colors showing on the displays. As reviewing several new technologies, one novel design on the backlight modules of color LCD displays is proposed in this work to enhance the color qualities of the images but still not substantially change too much of the existing configuration of the LCD displays.
Based on measurements from the spectral analysis, we found the fact that the mismatch between the transmittance spectra of the color filters and the primary color lights from the backlight modules is the main excuse for poor color saturation. Most of all, the transmittance spectra of the blue color filters and the green color filters have a big overlap band such that the blue light from the backlight module can leak via the green color filters and the green light via the blue ones. Applying the time sharing concept, one novel categorizing method for color sequential multiplexing is proposed to effectively enhance the color gamut of the LCD displays. In our practical implementation, the color gamut has been greatly increased by almost 20%.

關鍵字(中)

★ 色域
★ 顯示器

關鍵字(英)

★ LCD display
★ color Gamut

論文目次

第一章緒論 1
1-1 前言 1
1-2 現有顯示技術 1
1-2-1 彩色濾光片 1
1-2-2 色序法 3
1-2-3 LED 背光 4
1-2-4 局部變暗(LOCAL DIMMING) 5
1-2-5 四主色背光 7
1-2-6 五主色背光 8
1-2-7 高動態範圍(HIGH DYNAMIC RANGE, HDR) 9
1-3 研究動機與目的 11
第二章理論基礎與探討 14
2-1 LCD色彩顯示原理 14
2-2 混色法 15
2-2-1 色光加色法 15
2-2-2 並置混色法 16
2-2-3 交替混合法 16
2-3 混色計算 16
2-4 LCD更新畫面原理 17
2-5 螢幕影像更新原理 19
2-5-1 雙緩衝區(DOUBLE BUFFERING) 19
2-5-2 頁交換(PAGE FLIPPING) 20
第三章實驗設計與實作 22
3-1 實驗架構 22
3-2 實作方法 23
3-3 偏振因素的影響 24
3-3 光學系統實驗照片 25
3-4 實驗量測參數 28
3-5 程式流程圖 29
第四章實驗結果與分析 31
4-1 LCD-F 面板部份的紅、綠、藍穿透率光譜 31
4-1-1 LCD-F面板的紅光穿透率光譜 31
4-1-2 LCD-F面板的綠光穿透率光譜 32
4-1-3 LCD-F面板的藍光穿透率光譜 32
4-2 LCD-B白光光譜中紅光、綠光、藍光的比例與分析 34
4-3 LCD-F，LCD-B疊加之後的主色驗證 40
4-3-1 驗證疊加之後的紅色 40
4-3-2 驗證疊加之後的綠色 40
4-3-3 驗證疊加之後的藍色 41
4-4 背光顏色調變的探討 44
4-4-1 紅色調變背光 44
4-4-2 綠色調變背光 45
4-4-3 藍色調變背光 45
4-5 RG+RB分色法 49
4-6 驗證RG+RB分色法 52
4-7 分色法與白光背光的優缺點比較 55
4-8 色域大小的比較 60
第五章結論 61
參考文獻 63

參考文獻

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指導教授

楊宗勳(Tsung-Hsun Yang)

審核日期

2012-8-28

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