臺灣博碩士論文加值系統

在顯示器的發展上，人類不斷追求與現實更相近的影像。有鑑於視差障壁式裸視立體技術與曲面顯示技術兩者於理論上應可結合在一起，故本論文提出將視差障壁技術應用於圓柱狀顯示器上，以達到可在360度全範圍呈現立體影像的效果，在其圓柱狀的空間範圍內，使之與真實物體更為相近。
　　在參數設計上，在過去對於曲面視差障壁立體顯示器的研究中多直接使用平面視差障壁之設計公式，造成視域範圍相當受限。且由於圓柱面較一般曲面顯示器更為彎曲，故本文中提出針對圓柱狀顯示器之視差障壁參數設計原理與其公式，以求達到最佳的視域效果。另外，若直接將數個凸面顯示器接合起來，似乎也可形成圓柱狀顯示器，但其視域分布將非旋轉對稱，對於其中每一個凸面顯示器，在其中央或邊界處之視域將有前後偏移，故本研究中提出具有旋轉對稱性之新穎子畫素排列方式，使最終之視域模擬結果確實為旋轉對稱且無特定位置之視域面積縮減等現象。
　　在本研究中，提出以可見子畫素面積計算其輝度值，大幅降低視域模擬所需時間，使研究中可完整調變各參數，包括了視差障壁厚度、螢幕玻璃折射率、最佳觀賞距離與圓柱尺寸，且在各組參數之視域模擬中，均可最佳化子畫素開口率與視差障壁開口率，並確實得到了較過去研究更飽滿之視域面積。

Human beings always pursuit the better image quality in display technology, hope that the image on the display can be the same as we seen in natural environment. Due to the parallax barrier technique can be combined with the curved screen theoretically, this thesis proposes “cylindrical barrier-type autostereoscopic 3D display.” In this design, viewer can see the 3D image from all direction surrounded the display. Thus, this display provides realer 3D image in the inner space of the screen.
Previous researches apply the design rules of parallax barrier in the flat display on the curved case. However, the viewing zones in this design are limited in area. Furthermore, the curvature of cylindrical display is usually lower than common curved screen. For this reason, this thesis proposes the new design rules specially for parallax barrier in cylindrical display, which provide best viewing zone area size. When several convex displays can connect and form a cylindrical display, it will cause position shift and area shrink in viewing zones. Thus, in this research, we provide a new subpixel arrangement with rotational symmetry, and the simulation result shows the viewing zones also distribute with rotational symmetry.
In this research, a new calculation method for luminance of subpixels is provided, and it dramatically reduce the simulation time. Benefit by this method, parameters in our system can be investigate completely, including the thickness of parallax barrier, the refraction index of screen glass, the optimal viewing distance and the radius of screen. In each of the parameter settings, we optimize the aperture ratios of subpixel and parallax barrier. Consequently, the viewing zones with larger area than the previous research are obtained.

口試委員會審定書 #
誌謝 i
中文摘要 ii
ABSTRACT iii
目錄 iv
圖目錄 vi
表目錄 viii
參數符號目錄 ix
第 1 章、 緒論 1
1.1 研究背景 1
1.2 立體視覺之基本原理 2
1.2.1 生理視深因子 2
1.2.2 心理視深因子 3
1.3 3D顯示技術之分類 5
1.3.1 戴眼鏡式立體顯示器 5
1.3.2 裸眼式立體顯示器 6
1.4 研究動機與目的 10
第 2 章、 設計原理與影像品質因子 11
2.1 視差障壁型立體顯示器之基本原理 11
2.2 圓柱狀視差障壁型裸眼式立體顯示器之設計公式 12
2.2.1 曲面與平面視差障壁之差異 12
2.2.2 視差障壁週期PB之設計公式 14
2.2.3 視差障壁與螢幕之距離d之設計原理 15
2.3 新穎畫素排列之設計 17
2.4 其餘參數之設計 20
第 3 章、 研究方法 22
3.1 視域定義 22
3.2 模擬方法 23
3.3 立體影像之品質因子定義與分析方法 26
3.3.1 輝度均勻度 26
3.3.2 交互干擾 26
第 4 章、 研究結果與討論 28
4.1 圓柱狀視差障壁式立體顯示器視域之基本性質 28
4.2 視差障壁開口率aB與子畫素開口率aD之優化 31
4.3 視差障壁厚度w之影響 36
4.4 螢幕玻璃折射率nglass之影響 39
4.5 調變最佳觀賞距離XDEP 43
4.6 不同尺寸顯示器之模擬結果 46
4.6.1 小尺寸顯示器視域模擬結果 47
4.6.2 大尺寸顯示器視域模擬結果 49
第 5 章、 結論與未來展望 52
參考文獻 54

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