臺灣博碩士論文加值系統

近年來由於能源危機的問題出現，因此市面上各種電器、交通工具等等，跟能源有關的生活用品都偏向節能方向開發，當然也包含顯示器。許多的雙穩態顯示技術陸續的開發出來，由於這些技術能夠在不加電壓的情形下顯示同樣的畫面，所以市面上的一些產品如電子書、隨身碟、價格標籤、電子相框等需要用到長時間顯示同一畫面的顯示器也陸續使用此技術。在2004年時，我們的研究團隊提出一個新的雙穩態顯示機制BHN(Bistable Chiral Tilted-Homeotropic Nematic) LCD，其優點是有傳統製程、低電壓驅動、對比度高，而且擁有真正的穩態。

本論文主要針對BHN雙穩態顯示器的穩態作探討，首先製作實驗的樣品楔型液晶盒，並在製作液晶盒過程針對液晶盒參數的預傾角(pretilt angle)、螺距(pitch)、液晶盒厚度(cell gap)做量測與誤差分析以確定樣品參數為形成BHN雙穩態的條件，再來藉由TH態和T態的切換來尋找BHN雙穩態的範圍，接著由穿透率的量測以及模擬的數據比照來判斷兩個穩態為何種狀態，同時也可比對未灌入液晶的厚度量測和灌入液晶的厚度的差異。

Recently, green energy is one of the most popular issues in the world. Not only the transportation but also the electrical appliances for energy-saving are developed, surely including the displays. The technology of bistable displays are successively developed, which can show the same screen without applying the voltage. Attribute to this, several kinds of products which need keeping the same picture for a long time, such as e-books, flash drivers, price tags, electronic picture frames, and so on, are gradually using this technology. In 2004, our group made a report about a new bistable mechanism for the BHN LCD which has many advantages such as low-voltage-driven, high contrast, and there exist a real steady-state.
This paper has mainly discussed about the stable state of BHN LCDs. We focused on the liquid crystal cell’s parameters such as pretilt angle, pitch, thickness of LC cells and error analysis to determine the sample parameters for the formation of the conditions of bistable BHN cells. And we can switch the bistable states of BHN to find the bistability d/p range and the pretilt angle range. By using the measurement of transmittance and simulated data, we can determine what state is stable state.

摘 要 i
Abstract iii
誌 謝 iv
目 錄 vi
圖目錄 viii
表目錄 xiii
第一章 緒論 1
1.1 前言 1
1.2 文獻探討 5
1.2.1 BHN雙穩態模型 5
1.2.2 BHN雙穩態之d/p範圍 7
1.2.3 BHN雙穩態之穩態討論 11
1.2.4 BHN雙穩態條紋現象 15
1.3 論文研究重點及目的 19
第二章 模擬方法 21
2.1 不同螺距下BHN厚度範圍模擬 21
2.1.1 靜態模擬 21
2.1.2 動態模擬 22
2.2 π態和2π態模擬 23
第三章 樣品製作方法與結果 25
3.1 實驗樣品製作方法與結果 25
3.1.1 配向層製作 25
3.1.2 墊片製作 28
3.1.3 樣品製作 31
3.2 液晶盒樣品量測與結果 32
3.2.1 厚度量測及其結果 32
3.2.2 預傾角量測及其結果 37
3.2.3 液晶旋轉螺距量測及其結果 38
第四章 模擬與實驗結果分析 42
4.1 觀察結果 42
4.2 穩態討論 45
4.2.1 低預傾角之π態現象 46
4.2.2 中間層預傾角到76°之雙穩態現象 48
4.2.3 預傾角76°以上之條紋現象 53
第五章 結論與未來展望 56
參考文獻 58

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