光致垂直配向之高對比度液晶元件的最佳製備方式及其光電性質等探討。本研究主要是利用非接觸光聚合誘發液晶與預聚物產生其相分離行為後，藉此形成具有垂直配向效果的偽PI聚合物薄膜。而在分子結構設計方面，本文採用具有烷基長碳鏈和主鏈雙酚型等光硬化壓克力預聚物並摻混光起始劑以及負誘電異方型液晶(Negative dielectric anisotropy type liquid crystal, NLC)等成份，經充分攪拌與超音波震盪形成均一的液晶混合溶液。本研究最初的構想是希望將此液晶混合溶液在經由紫外光照射程序後，因光聚合誘發相分離使得負誘電異方型液晶與光硬化壓克力預聚物產生複合層化結構之垂直配向共聚薄膜(Vertical alignment copolymer film, VACOF)。而此新穎的光配向技術不僅可改善傳統摩擦配向製程所產生的缺點以提升其良率之外，本實驗也期盼朝著製程縮短化以及面板低價化之目標邁進。

The optimal preparation methods and the electro-optical properties of high contrast liquid crystal device by photo induce vertical alignment will be studied. In the study, the research use non-contact photo-polymerization induced liquid crystal (LC) and pre-polymer to form a vertical alignment (VA) effect of pseudo-Polymer thin film after the phase separation. In the molecular structure design, the research utilize photo-curable acrylic pre-polymer, (alkyl long carbon chain and main chain biphenol type etc.) and mix photo-initiator and negative dielectric anisotropy type liquid crystal (NLC) etc. component together.
Forming the homogeneous LC mixture solution (NLC/photo-curable acrylic pre-polymer mixture systems) is via enough stirred and ultrasonic vibration. The research use photo-polymerization induced phase separation (PIPS) effect, and to make the NLC and the photo-curable acrylic pre-polymer generate composite layer structure of the vertical alignment copolymer film (VACOF) after the Ultra-Violet (UV) light irradiation process.
The photo alignment of this novel technology can not only improve the traditional rubbing alignment shortcoming but also promote yield of the process. Our goal is expecting toward shortening the process for manufacture and decreasing the cost of the panel.

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