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1. 发明授权

US4264148A Liquid crystal display devices having an induced cholesteric phase 失效
标题翻译：具有感应胆甾醇相的液晶显示装置
公开(公告)号：US4264148A
公开(公告)日：1981-04-28
申请号：US48795
申请日：1979-06-15
申请人： Annerose Gobl-Wunsch , Gerd Heppke , Feodor Oestreicher
发明人： Annerose Gobl-Wunsch , Gerd Heppke , Feodor Oestreicher
IPC分类号： C09K19/54 , C09K19/50 , C09K19/58 , G02F1/133 , G02F1/1337 , G02F1/1343 , G02F1/137 , G02F1/139 , G09F9/35 , G02F1/13 , C09K3/34
CPC分类号： G02F1/134336 , C09K19/586 , G02F1/137 , Y10S359/90
摘要： An operable liquid crystal display device having threshold energy fields dependent on a finite temperature operating range is provided with a layer of a liquid crystal material positioned between the carrier plates of such device. The liquid crystal material includes a nematic carrier material and at least two doping chiral additives, one of which exhibits a clockwise twisting tendency and the other which exhibits a couter-clockwise twisting tendency. The twisting characteristic for the cholesteric phase has a temperature-dependent pitch and, under certain conditions, a temperature-dependent direction of rotation. With such a multiply-doped liquid crystal material and with the application of a controllable select energy field, such as electricity or magnetism to such material, selective display characteristic data can be generated by, for example, a temperature-independent pitch, a helix inversion, or a pitch which greatly increases or decreases with an increasing temperature within the finite temperature range. In such liquid crystal materials, the threshold field strengths are temperature-constant for different display effects or may be compensated to the temperature-dependency of other magnitudes, such as the temperature drift of a driving module designed as an integrated circuit.
摘要翻译：具有取决于有限温度操作范围的阈值能量场的可操作的液晶显示装置设置有位于这种装置的载体板之间的液晶材料层。液晶材料包括向列型载体材料和至少两种掺杂手性添加剂，其中一种显示出顺时针扭转的趋势，另一种呈现出向下的扭转趋势。胆甾醇相的扭转特性具有温度依赖性的间距，并且在某些条件下具有温度依赖的旋转方向。利用这样的多重掺杂液晶材料，并且通过对这种材料施加诸如电或磁性的可控选择能量场，可以通过例如不依赖于温度的间距，螺旋反转来产生选择性显示特性数据，或在有限温度范围内随着温度升高而大大增加或减小的间距。在这种液晶材料中，对于不同的显示效应，阈值场强是温度常数，或者可以补偿其他量级的温度依赖性，例如被设计为集成电路的驱动模块的温度漂移。

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