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Title: | 負型液晶用於新型電極結構的快速垂直配向邊緣場效驅動液晶顯示器模擬 Simulation of Negative Type Liquid Crystal for Vertically-Aligned Fringe-Field-Switching Liquid Crystal Display with New Electrode Designs |
Authors: | 陳俊廷 Chun-Ting Chen |
Advisor: | 蔡永傑 Wing-Kit Choi |
Keyword: | 高穿透率,三維電極結構,垂直配向邊緣場效驅動,挖洞電極,對應電極,圓形電極,相等電極面積, high-transmittance,three-dimensional electrode,vertically aligned fringe field switching,hole-pattern electrode,complementary electrode,circular electrode,same electrode area, |
Publication Year : | 2023 |
Degree: | 碩士 |
Abstract: | 科技發展快速,顯示裝置琳瑯滿目,應用的範圍也越來越廣,所需要的性能要求也越來越高,要在高穿透率的同時有快速反應,儼然已經成為趨勢。
過去研究發現在3D VAFFS上方加入一整片共用電極,使得我們在原有的水平方向電場基礎上多加入垂直方向電場能夠得到較原本高出許多的穿透率,但對於這個設計並沒有做更多的研究。 本論文優化了3D VAFFS COM結構的穿透率,包括小尺寸的結構設計、在下層共用電極挖洞優化穿透率、在對應上層共用電極設計優化穿透率,並透過圓形畫素電極切割與傳統井字設計的相等電極面積比較,讓我們對未來電極設計有更多選擇。 首先,我們通過模擬和優化方法確定了3D VAFFS COM的小尺寸結構。這種結構在上方加入了一整片共用電極,使得原有的水平方向電場基礎上增加了垂直方向電場。透過電極寬度、間隔還有液晶的選擇可提供更好的顯示效果和穿透率。 3D VAFFS COM結構在某些情況下可能會出現暗區的問題。為了解決這一問題,我們引入了下層共用電極挖洞的技術。透過在下層共用電極上挖洞,可以改善邊緣場的分佈情況,減少暗區的出現。挖洞技術使邊緣場更廣泛地作用於液晶層,從而提高穿透率並改善暗區問題。除了在下層共用電極挖洞,我們還提出了對應電極間隔上層共用電極設計來優化穿透率的方法。這種設計方法可以提高電場的均勻性和覆蓋範圍,從而進一步提高穿透率和顯示效果。 此外,我們比較了圓形畫素電極切割和傳統井字設計的相等電極面積。這樣的設計可以增加穿透率。相比之下,傳統的井字設計條狀畫素電極導致電場不均勻,使穿透率和反應時間降低。我們得出了能夠進一步提升穿透率的方法和一樣面積下性能更好的電極設計。 The rapid technological development has led to a wide variety of display devices with higher performance requirements. High transmission and fast response times have become prominent trends. Previous research has found that by adding a common electrode above a 3D VAFFS structure, it can help improve its transmission significantly. However, this design lacks further investigation. This thesis reports the results of improving light transmission in 3D VAFFS through methods such as smaller electrode width, hole-pattern design in the lower common electrode layer and complementary upper common electrode design. Additionally, we also proposed new circular electrode design and compared its performance with traditional electrode design. For a fair comparison, the total electrode area remained the same for both designs. The proposed new electrode designs can potentially provide better display performance such as higher transmission and faster response time. To improve light transmission in the center dark regions, we introduced hole-pattern design in the lower common electrode layer in order to improve its edge electric field distribution. The complementary upper common electrode design can help further enhance its transmission and display performance by e.g. reducing the dead zone area. By comparing the new proposed circular pixel electrode with traditional pixel electrode under same total electrode area, we found that the new proposed circular design can help improve light transmission and provide faster response time. Traditional electrode designs may result in uneven electric field distribution, hence may lead to lower transmission and also slower response time. Our proposed new circular designs thus may help further improve its light transmission and hence achieve better performance under the same electrode area. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/90465 |
DOI: | 10.6342/NTU202303564 |
Fulltext Rights: | 未授權 |
Appears in Collections: | 光電工程學研究所 |
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ntu-111-2.pdf Restricted Access | 14.39 MB | Adobe PDF |
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