曲面式視差障壁型雙視域顯示器設計參數之研究

Abstract

在影像顯示的發展上，從平面顯示器到3D立體顯示器，人類為追求更逼真與符合自然的視覺需求，立體顯示技術不斷提升，其中更以裸眼式立體顯示技術最為市場主流，具有不需配戴眼鏡的優勢，使用彈性較高。雙視域顯示器則是將立體顯示技術中，雙眼間距改為可自行設計的雙人間距，從本來分送給左眼及右眼的影像資訊，變成可同時提供兩種不同影像資訊給予至少兩位使用者於單一顯示器上的技術。近年來，可撓式基板技術的進步，使得曲面顯示技術的議題受到重視，彎曲的顯示螢幕具有螢幕增大的效果以及可設計為符合人眼舒適感受的曲線，提供更為逼真舒適的自然視覺享受，因此更可以期待曲面式的雙視域顯示器。 對裸眼式雙視域顯示器而言，觀賞位置與可在觀賞位置附近的可移動範圍會影響觀賞品質；觀賞視域(Viewing Zone)描述在顯示器前，觀賞者可體驗兩種不同影像資訊的可移動範圍。而就曲面式雙視域顯示器來說，曲率半徑與可視角度會決定相對彎曲程度，彎曲程度不同時，顯示器所提供的空間光強分佈便會改變，對於以分光達成將不同影像資訊送進左邊及右邊觀賞視域的雙視域顯示器，是影響觀看影像品質的關鍵。 基於前人研究計算出的觀賞視域公式，本論文將推導曲面式視差障壁型雙視域顯示器的設計觀賞位置並描繪觀賞視域，藉由調變相關參數，探討具有折射率基板下曲率半徑、可視角度及視差障壁位移量對觀賞視域大小與位置的影響，並加入交互干擾與均勻度評估影像品質。 本篇論文的研究將提供曲面式基板結合雙視域顯示器領域參數設計的參考，回饋設計分析及製程量測端；也期許未來可撓式雙視域顯示器的發展，能以此論文的論點作為深入研究的基礎。

Human beings always pursuit more realistic and natural visual requirements, and the stereoscopic display technology is constantly improving. Among them, the naked-eye is the most mainstream in the market, which has the advantage of not wearing glasses and higher flexibility. The dual-view display changes the distance between the eyes to the double views that can be designed by yourself. From the image information that was distributed to the left and right eyes, it can provide two different images to at least two users on a single display at the same time. In recent years, the advancement of flexible substrate technology has brought attention to the issue of curved display. Curved displays provide screen-enlarged perception and ability to the curve design which comforts our visual experience. Therefore, in the progress of providing a more natural and comfortable visual experience, a curved dual-view display is highly expected in the future. For the naked-eye dual-view display, viewing position and the range nearby strongly affect image quality. Viewing zone describes the range that a viewer could move while experiencing two different image information in front of the display. Regarding a curved dual-view display, radius and viewing angle of the screen determine the relative degree of bending, by which the spatial light distribution is determined. In addition, this is a key factor influencing image quality, especially for the display which directs the views for left and right viewing areas based on different images. In this thesis, the formula for a curved barrier-type dual-view display will be derived, based on previous research on the calculation of viewing position and viewing zone for a planer barrier-type autostereoscopic display. Furthermore, with the aid of the ray-tracing software, the viewing zone will also be depicted and discussed as given different curvature radius or viewing angle of the screen with refractive index substrate. Finally, the image quality will be discussed by considering crosstalk and uniformity in each case. The purpose of this thesis is to provide a parameter-design reference for a curved dual-view display. We look forward to the advance in curved dual-view display, and the contribution of this thesis to further research on curved dual-view display.