可切換液晶透鏡陣列用於區域式2D與光場影像混合型顯示器

Partially 2D / Hybrid Light Field Display by Using Switchable Liquid Crystal Micro-Lens Array

黃鉦庭(Cheng-Ting Huang)

指導教授 ： 黃乙白

國立交通大學/電機學院/光電工程系所/碩士(2019年)

摘要

近數十年來，顯示技術快速的發展，而立體顯示是其中熱門且前瞻的研究主題。目前，採用雙眼視差原理的立體顯示器已經商用化，然而，這種傳統的立體顯示器具有視覺輻輳調節衝突(Accommodation-Convergence conflict)這項問題，所以容易造成人眼視覺疲勞或暈眩，因此，為了改善上述的問題，最近幾年來，採用光場技術來呈現真實立體影像被廣泛地研究，不過，顯示光場畫面必須犧牲顯示器的解析度，因此，能針對使用者的需求來切換顯示2D/3D畫面，甚至能呈現區域式2D/3D，是被使用者所期望的。
於是在本論文中，可切換的液晶透鏡陣列被採用於實現一種新型的顯示技術稱為區域式2D與光場影像混合型顯示器(Partially 2D / Hybrid Light Field Display)。首先，針對光場顯示去設計適合的液晶透鏡陣列，之後，採用高阻值液晶透鏡陣列且利用其對驅動頻率相依的特性，提出解決方式來改善液晶透鏡陣列中偏心以及不連續線的問題並且優化其品質。然後，搭配偏振切換元件，來快速切換區域式光場立體影像模式以及高解析度平面影像模式。此外，依據定義好的2D與3D顯示區域，來給予顯示器設計過的影像。最後，使用者能夠因為人眼視覺暫留而觀察到一個解析度被補償且真實重建出的區域式2D/3D影像。

關鍵字

液晶透鏡 ； 高阻值微型液晶透鏡陣列 ； 光場顯示 ； 混合型光場顯示 ； 頻率調製 ； 區域型2D/3D

並列摘要

Over the past decades, display technology has been developing rapidly. 3D display technology is a hot and novel topic in the field of display technology. Nowadays, convention 3D display based on binocular disparity has been commercialized. However, this type of 3D displays has the issue of accommodation-convergence conflict so it easily induces visual fatigue and dizziness. Therefore, to solve this issue, adopting the technique of light field to produce true 3D image has been widely studied in recent years. But, the resolution of the image will be sacrificed for displaying light field image. Accordingly, to meet the demand of users, switchable 2D/3D display and even partially 2D/3D display are required.
In this thesis, the switchable liquid crystal micro-lens array (LCMLA) is used to realize a new type of display called partially 2D / hybrid light field display. At first, the proper LCMLA is designed for light field display. Then, the methods based on the frequency dependency of Hi-R LCMLA are proposed to improve its decenter issue and disclination line effect as well as optimize the device. Then, Hi-R LCMLA is combined with a fast response polarization rotator to switch partially light field 3D mode and high-resolution 2D mode rapidly. In addition, the display panel will alternatively present the processed images based on the determined 2D and 3D region. Finally, the user can perceive a partially 2D/3D image with the truly reconstructed 3D scene as well as the compensated resolution due to visual persistence.

並列關鍵字

Liquid Crystal Lens ； High-Resistance Liquid Crystal Microlens Array ； Light Field Display ； Hybrid Light Field Display ； Frequency Modulation ； Partially 2D/3D

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