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研究生: 吳其倫
Qi-Lun Wu
論文名稱: 新穎顯示器影像色彩品質評價之研究
Study of Image Quality Evaluation of Novel Displays
指導教授: 陳鴻興
Hung-Shing Chen
口試委員: 溫照華
Chao-Hua Wen
孫沛立
Pei-Li Sun
林宗翰
Tzung-Han Lin
陳鴻興
Hung-Shing Chen
學位類別: 碩士
Master
系所名稱: 應用科技學院 - 色彩與照明科技研究所
Graduate Institute of Color and Illumination Technology
論文出版年: 2018
畢業學年度: 106
語文別: 中文
論文頁數: 117
中文關鍵詞: OLED顯示器量子點顯示器心理物裡實驗影像品質色彩特性
外文關鍵詞: OLED display, Quantum dot display, Psychophysics experiment, image quality, color characteristics
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本論文對新穎顯示器的影像色彩品質進行研究,更進一步探討視覺評價的結
果。研究分成三個實驗,實驗一為針對壁紙式有機二極體顯示器(簡稱 OWP)與桌
上型曲面量子點顯示器(簡稱 QD LCD)這兩台新穎顯示器進行心理物理評價實驗,
實驗二與實驗三則分別針對顯示器色域及顯示器色彩特性做深入的研究。

實驗一為新式顯示器評價,第一部分先以分光輻射儀量測 OWP 與 QD LCD
顯示器,取得亮度、色域、階調等色彩特性,第二部分則在不同觀察角度、不同
環境照度下評價兩台顯示器得影像品質、功能感受、情緒感受與總體感受。由兩
部份的實驗結果整理發現,雖然兩顯示器色域相近,但因安裝類型、顯示技術、
螢幕形狀不同,造成評價的差異,OWP 的高對比度及極薄的壁紙式螢幕等特點,
使 OWP 的整體評價分數比 QD LCD 高,唯在「穩固度」這項是 QD LCD 分數較
高,在視覺評價中,桌上型看起來還是比壁紙式來的穩固一些。

實驗二為顯示色域最佳化,以國際組織推薦的標準顯示色域做為最佳化色域
的設計參考,並蒐集市場上廣色域顯示器的色域資料,用來判斷現今顯示科技可
行性的依據與色域優化的方向,因此,本研究以 DCI-P3的紅色色度座標為依據,
選擇大於 DCI-P3但小於 Rec.2020色域的藍色與綠色色度座標,做為色域的三原色
色度座標建立了新色域,並以 Pointer 色域 與 SOCS 物體色頻譜資料庫進行色域色
彩再現能力的評估。評估結果顯示優化後所建立的色域表現比 DCI-P3優異,且其
色彩再現能力與 Rec.2020相差不遠,但還是無法完全涵蓋較低明度的 SOCS 物體
色色域,仍有進步的空間。

實驗三為顯示色彩與階調特性最佳化,以可調式顯示器設置了三種色溫,三
種階調,兩種亮度,共18種顯示模式進行人因評價,探討顯示模式對自然影像與
文字圖表的評價影響,結果顯示自然影像的影像品質在色溫、階調與亮度有顯著
影響,文字與圖表的顯著變因則是亮度與色溫。綜合本研究的三個實驗結果,可
做為顯示器色彩特性設置的參考,依需求進行調整及優化。


  The image quality of novel display is evaluated in this study. There are three experiments: Experiment 1 (Exp-1) analyzed the color characteristics, physical characteristics and perceptual image quality for the OLED wall-paper display (termed OWP) and a curved quantum-dot LCD (termed QD-LCD) which are popular on the market. Experiments 2 (Exp-2) and Experiments 3 (Exp-3) are to study ideal color gamut and preferred color characteristics of the displays respectively.
  Exp-1 is called “Evaluation of OWP and QD-LCD”. The measurement results of color characteristics showed that the color gamuts of the two displays are similar. In the full screen mode, QD-LCD’s white luminance is 3 times higher than that of the OWP. However, using International Committee for Display Metrology (ICDM) recommended APL-fixed test patterns, both OWP and QD-LCD showed similar Tone Reproduction Curve (TRCs) and luminance levels. OWP's high contrast and extremely thin wall-mounted screens make OWP's overall evaluation score higher than QD-LCD, except for ‘steady’ item. The possible reason is that the desktop setup looks more stable than the wall-mounted type in the visual assessment.
  Exp-2 named “Display gamut optimization”. The optimized color gamut was established by using DCI-P3 color gamut as reference prototype. The Pointer’s gamut and SOCS database of the object color were used to evaluate the optimized color gamut’s color reproduction capability. The evaluation results show that the optimized color gamut has better performance than the DCI-P3, but slightly worse than the Rec.2020. Although optimized color gamut can cover Pointer’s gamut completely, but still can’t cover SOCS completely.
  Besides, Exp-3 named “Preference of display color and tone curve”. Eighteen patterns were designed for visual evaluation with three color temperatures, three TRCs and two brightness levels. The results showed that the image quality of natural images has a significant effect on color temperature, TRC and lumiance. The significant causes of text and graphics are lumiance and color temperature.The three experimental results of this thesis can be used as a reference to set the color parameters of the display, and to optimize its visual performance according to requirements.

中文摘要 I ABSTRACT II 致謝 III 目錄 IV 圖目錄 V 表目錄 VIII 第一章 緒論 10 1.1 研究背景 10 1.2 研究目的 11 1.3 論文架構 12 第二章 實驗原理 13 2.1 色彩度量學原理 13 2.2 彩色顯示器原理 25 2.3 統計與分析 33 第三章 文獻探討 35 3.1 色域規範 35 3.2 顯示器評價 39 第四章 研究方法與設計 44 4.1 實驗架構 44 4.2 實驗一 新式顯示器評價 45 4.3 實驗二 顯示器色域優化 55 4.4 實驗三 顯示器色彩與階調特性最佳化 58 4.5 實驗設備 63 第五章 研究結果 65 5.1 實驗一 新式顯示器評價 65 5.2 實驗二 顯示器色域優化 80 5.3 實驗三 顯示器色彩與階調特性最佳化 86 第六章 結論與未來建議 112 參考文獻 114

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