Reverse Mode Polymer Dispersed Liquid Crystal Materials

反向模式聚合物分散液晶材料

• 批准号: 9161281
• 负责人: Bao-Gang Wu
• 金额: $ 4.95万
• 依托单位: Polytronix Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-01-01 至 1992-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9161281&HistoricalAwards=false
• 关键词: Reverse; Mode; Polymer; Dispersed; Liquid

The proposed work centers on the development of reverse mode polymer dispersed liquid crystal materials. These materials, which will be fabricated either as films or as encapsulated droplets, are radically different from other liquid crystal devices, including normal mode polymer dispersed systems. The important distinction of reverse mode materials is that they represent an optically transmissive state in the absence of applied fields and are converted to an opaque light scattering state when a field is applied. Their field-off/field-on behavior is exactly opposite to that normally associated with optical properties of liquid crystal materials, thus giving rise to the reverse mode designation. There are numerous major and unique commercial opportunities for these reverse mode polymer dispersed liquid crystal materials. They include architectural use as "smart windows" for energy savings in commercial and residential buildings; privacy windows in automobiles; and as a new approach to heads-up display technology. The unique feature of reverse mode materials with respect to these applications, as contrasted with other liquid crystal light shutters, centers on the fail-safe aspect in that they are transparent in the absence of an applied field. Thus, unscheduled power outages will not create hazardous situations. The economic factors in commercialization would be most favorable in that these reverse mode materials are relatively inexpensive to produce. The focus of the phase I experimental effort is to improve the overall optical properties of reverse mode polymer dispersed liquid crystal materials. In particular, systematic studies will be conducted to optimize the percent transmission of these materials in the transparent field-off state through modification of the shapes and sizes of the liquid crystal microdroplets.

建议的工作中心是发展反向 模式聚合物分散液晶材料。 这些 材料，其将被制造为薄膜或 封装液滴，与其他液体完全不同 晶体器件，包括正常模式聚合物分散系统。 反向模式材料的重要区别在于它们 在不存在下表示光学透射状态 施加场，并转换为不透明的光散射 当一个字段被应用时。 他们的场离/场开行为 与通常与光学相关的情况正好相反， 液晶材料的性质，从而引起了 反向模式指定。 有许多重大和独特的商业机会 对于这些反向模式聚合物分散液晶 材料. 它们包括建筑用途，如“智能窗户”， 商业和住宅建筑物的节能;隐私 汽车的窗户;以及作为一种新的方法来抬头显示 技术. 反向模式材料的独特功能， 对于这些应用，与其它液体相比， 水晶百叶窗，集中在故障安全方面， 它们在没有外加场的情况下是透明的。 因此，在本发明中， 不定期停电不会造成危险情况。 商业化的经济因素将是最有利的 因为这些反向模式材料相对便宜 制作。 第一阶段实验工作的重点是改进 反向模式聚合物分散的整体光学性质 液晶材料 特别是，系统研究将 进行优化，这些百分比传输 通过改性使材料处于透明场截止状态 液晶微滴的形状和大小。