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Synthesis of Predesigned Ferroelectric Liquid Crystals and Their Applications in Field-Sequential Color Displays

机译：预先设计的铁电液晶的合成及其在场序彩色显示器中的应用

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摘要

A series of low transition temperature and fast response chiral smectic C (SmC*) liquid crystals is designed and synthesized. The phase transition behaviors and electrooptical properties of the synthesized compounds are investigated and compared with reported values. The ferroelectric phase of the liquid crystals is characterized by means of differential scanning calorimetry, polarizing optical microscopy, wide-angle X-ray scattering (WAXS), and electrooptical measurements. The wide SmC* phase is achieved via the induction of achiral trisiloxane and a chiral methyl-lateral substituent onto the terminuses of the molecules. The optimized packing arrangement model is studied based on the exceptionally high apparent tilt angles (approximate to 41 degrees) and smectic layer spacing observed using WAXS. A fast response time of 0.3 ms in an electric field of 10 V mu m(-1) provides an opportunity to use the synthesized materials for field-sequential color liquid crystal displays (FSCLCDs). An FSCLCD sample cell is fabricated using the synthesized ferroelectric liquid crystals via a red (R), green (G), and blue (B) backlight. A color-frame frequency of more than 500 Hz (i.e., a frame frequency more than 166 Hz) is achieved. As a single material liquid crystal display cell, the synthesized ferroelectric liquid crystals show great performances at room temperature.
机译：设计并合成了一系列低转变温度和快速响应的手性近晶C（SmC *）液晶。研究了合成化合物的相变行为和光电特性，并将其与报道的值进行了比较。液晶的铁电相的特征在于差示扫描量热法，偏振光学显微镜，广角X射线散射（WAXS）和电光测量。宽的SmC *相是通过在分子的末端引入非手性三硅氧烷和手性甲基-侧基取代基来实现的。基于WAXS观察到的异常高的表观倾斜角（约41度）和近晶层间距，研究了优化的包装排列模型。在10 Vμm（-1）的电场中0.3 ms的快速响应时间提供了将合成材料用于场序彩色液晶显示器（FSCLCD）的机会。使用合成的铁电液晶通过红色（R），绿色（G）和蓝色（B）背光制造FSCLCD样品池。获得大于500Hz的彩色帧频率（即，大于166Hz的帧频率）。作为单一材料的液晶显示单元，合成的铁电液晶在室温下表现出优异的性能。

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