六角形排列的電極結構設計 應用於低操作電壓與高穿透率藍相液晶顯示器之研究

Abstract

在現今這個資訊爆炸的時代，人們大多是藉由視覺做為主要接受資訊的媒介，像是手機、電腦、平板與電視，因此用來表達資訊的顯示器在我們生活中扮演非常重要的角色。而液晶顯示器(LCD)為目前廣受大眾使用的顯示器，儘管LCD 面板技術發展成熟而有著許多的優點，但還是有需要改善的地方，像是反應時間較慢，畫面可能會出現動態模糊、殘像等缺點。近年來藍相液晶崛起，藍相液晶利用高分子聚合物可改善有效溫度範圍過窄的問題，這樣可以讓有效的溫度範圍從1K 增加至60K左右，而這稱之為高分子穩定藍相液晶(PSBPLC)。而藍相液晶不只可以滿足對響應時間的需求，還有高對比度、視角廣與製程簡單等優點，因此藍相液晶為目前業界與學術界的重要研究題材之一。 然而藍相液晶顯示器(BPLCD)還是有高操作電壓以及穿透率較低的缺點，為了改善這些缺點，研究的方向可以是藍相液晶材料的開發，或是顯示器面板結構的設計與改良，而本篇論文將提出新的結構設計，此新結構可使藍相液晶顯示器，達到低操作電壓與高穿透率之目的。 在本篇論文中，結構設計主要以三維平面型IPS 為主要的驅動原理，也應用了三階電極集之結構原理，搭配了各種電極形狀與排列的設計，結構的設計從六角形電極結構為基礎開始改良，衍生出三角形、圓形與中空電極等等之結構，以Techwiz模擬軟體對高分子穩定型藍相液晶進行穿透率與操作電壓的模擬，藉由調整電極間距、電極寬度與電極高度等參數來模擬藍相液晶的表現，根據模擬結果，分析並探討各中參數與結構對於穿透率與操作電壓之影響，進而設計出高穿透率與低操作電壓之電極結構。 而在我們的實驗中，發現以六角形排列為基礎設計之電極結構，將有潛力發展出高穿透率與低操作電壓之藍相液晶顯示器。

In today's generation of information explosion, people mostly rely on vision as the main way to receive information, such as mobile phones, computers, tablets and TVs. Therefore, the displays used to convey information play a very important role in our life. The liquid crystal display (LCD) is currently widely used. Although the LCD panel technology has developed well and has many advantages, there is still room for improvement. One room for improvement is that the response time can be long, the image may appear motion blur and so on. In recent years, the blue-phase liquid crystal, made use of polymer stabilization technique to improve the problem of its limited effective temperature range, has increased the effective temperature range about 1K to 60K. It is called Polymer-Stabilized Blue-Phase Liquid Crystals (PS-BPLC). The blue phase liquid crystal can not only meet the needs of response time, but also has the advantages of high contrast, wide viewing angle and simple manufacturing process. Therefore, the blue phase liquid crystal is one of the important research topics in the industry and academia at present. However, the blue-phase liquid crystal display (BPLCD) still has the disadvantages of high operating voltage and lower transmittance. To improve these disadvantages, the research direction can be the development of blue-phase liquid crystal materials or the design and improvement of the display panel structure. In this thesis, we will propose a new structural design which makes the operating voltage low and transmittance high. In this paper, the structural design is mainly based on the three-dimensional flat IPS as the driving principle. The principle of three level IPS structure is also applied, and the design of various electrode shapes and arrangements is adopted. The design of the structure is based on the hexagonal electrode structure. By improving hexagonal electrode structure. we came up the designs with triangular, circular and hollow electrodes. We use Techwiz simulation software for polymer stabilized blue phase liquid crystal to simulate the transmittance and operating voltage of the structure. By adjusting the electrode gap, electrode width and electrode height and other parameters to simulate the performance of blue-phase liquid crystal. According to the simulation results, we analyze and research how the parameters effects transmittance and operating voltage, and then design the structure with high transmittance and low operating voltage. In our experiments, we found that the structure based on the hexagonal arrangement of electrodes has the potential to design the blue phase liquid crystal display with high transmittance and low operating voltage.