臺灣博碩士論文加值系統

平面顯示器已經廣泛地應用在日常生活中，例如智慧手機、平板電腦等，成為人們接收資訊不可或缺的工具。有機發光二極體(OLED)在眾多顯示技術中，被認為是色彩品質最好的技術，但受限於光罩解析度以及製作成本的限制，目前還無法取代LCD成為主流顯示技術。
本研究的目的在於尋找適用於OLED顯示器的子像素排列方式。探討數種可行之子像素排列、開發相對應的子像素渲染和色彩對應演算法進行光學混色模擬，並進行人因實驗驗證模擬成果。研究結果顯示田字模式(RGGB Quad)的視覺解析度最高，田字鏡射(MQuad RGGB)的等效觀測距離較遠，換算與LG G2手機423 ppi在20公分觀測條件下的解析度，前者僅需357 ppi，後者則需要493 ppi，才可以和手機的影像解析度品質相同。田字鏡射應用在OLED光罩設計時，解析度要求可降低至246 ppi。相較於田字鏡射(MQuad RGGB)，使用子像素大小不均等(size-varied)的田字形模式以及適度的影像銳化，可獲得更好的視覺均勻度與解析度。
本研究開發了一個子像素排列與演算法實作的模擬平台，可以預觀不同的子畫素排列設計與子畫素渲染使用參數的視覺效果。透過本研究的視覺實驗，基本掌握了OLED子像素排列設計原則。本研究據此設計適用於低解析度OLED光罩的高解析度顯示技術。

Flat panel displays have been widely used in smart phone, tablet PC and TV as primary tools for receiving visual information. Among all types of display technologies, OLED provides best color quality and image contrast. However, due to higher cost in mass production and resolution limitation of photomasks in its manufacturing process, OLED has still not yet replaced LCD to be the mainstream of display technology.
The aims of this study are to investigate which subpixel arrangements (SPA) are more suitable for OLED displays, to develop the corresponding subpixel rendering (SPR) algorithm, and to estimate their visual performance by simulating the subpixel images on a low resolution simulator. The results show RGGB Quad is the best. Mirror Quad RGGB needs more distance to match the sharpness of a 423 ppi LG G2 smart phone at 20 cm viewing distance. The Mirror Quad RGGB enables to use low resolution OLED photomask with high resolution TFT. A size-varied RGGB quad subpixel arrangement is proposed to further enhance its visual image quality.
A subpixel arrangement and subpixel rendering (SPR) simulator also has been developed to simulate the visual appearance of different SPAs with different SPR parameters. By means of the psycho-visual results of this study, guidelines of OLED SPA design can be derived to improve the image quality of OLED displays.

中文摘要
ABSTRACT
誌謝
目錄
圖目錄
表目錄
第一章、 緒論
1.1 研究背景
1.2 研究動機與目的
1.3 論文架構
1.4 論文發表
第二章、 文獻探討
2.1 有機發光顯示器
2.2 子畫素排列
2.3 子畫素色渲染
2.4 RGB垂直條紋排列
2.5 RGB田字型排列
2.6 視覺解析度
2.7 子畫素定址
2.8 影像品質評估方法
第三章、 子畫素排列模擬製作與實驗
3.1 子畫素排列及演算法
3.1.1 子畫素色渲染(SPR)演算法程式架構
3.1.2 畫素色渲染(SPR)演算法程式流程
3.2 SPR模擬螢幕之分析
3.2.1 Samsung和LG 55” OLED curved TV比較
3.2.2 LG 65” 4K2K LCD TV （LG65）
3.2.3 EIZO CG241W LCD螢幕 (EZ24)
3.3 解析度視覺實驗
3.3.1 模擬之顯示解析度和資料渲染
3.3.2 解析度人因評價正式實驗
3.4 解析度人因評價實驗結果分析
3.4.1 觀測距離與影像品質的相關分析
3.4.2 觀測距離的變異數分析
3.4.3 各種影響品質的變異數分析
3.4.4 基準評價（benchmark）的變異數分析
3.4.5 等效觀測解析度分析
第四章、 SPR模式的簡化與改良
4.1 簡化MQuad RGGB
4.2 Size-Varied Quad RGGB
第五章、 第二階段解析度人因評價實驗
5.1 SPR模擬螢幕分析
5.2 解析度人因評價實驗
5.3 解析度人因評價實驗結果分析
5.3.1 觀測距離與影像品質的相關分析
5.3.2 觀測距離的變異數分析
5.3.3 各種影響品質的變異數分析
5.3.4 基準評價（benchmark）的變異數分析
5.3.5 等效觀測解析度分析
第六章、 子像素排列與演算法實作模擬平台
6.1 模擬平台
6.2 自適濾波演算法
第七章、 結論與未來展望
7.1 結論
7.1.1 第一階段子畫素排列模擬實驗
7.1.2 第二階段子畫素排列模擬實驗
7.2 未來展望
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