STTR Phase II: High Twisting Power Chiral Materials for Nanostructured Bragg Reflective Displays

STTR 第二阶段：用于纳米结构布拉格反射显示器的高扭转功率手性材料

• 批准号: 0091522
• 负责人: J. William Doane
• 金额: $ 49.71万
• 依托单位: KENT DISPLAYS INC
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-02-01 至 2003-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0091522&HistoricalAwards=false
• 关键词: STTR; Phase; II; Twisting; Power

This Small Business Technology Transfer (STTR) Phase II Project develops a new class of chiral materials, the dioxolanes, which provide unprecedented helical twisting power. When added to a nematic liquid crystal, a concentration of only a few percent is required to twist the nematic phase into a tight helix with a periodicity of the wavelength of light. Because of the low concentration, the chiral additive does not dilute important physical properties of the nematic material required to optimize Cholesteric displays for brightness, contrast, speed and low operating voltages. Being simple molecular structures, dioxolane derivatives can be synthesized in both left and right hand moieties to enable, for the first time, Cholesteric displays that nearly double the reflective brightness to where it approaches that which we are used to seeing from paper. Phase II research has both a basic and an applied component. The basic component studies the helical twisting power and its relationship to the molecular structure of the chiral compounds and host mixtures. The applied component uses this information to design and develop chiral additives for advanced Cholesteric displays for use in electronic books and other handheld devices.The chiral materials will be used in display products primarily used in handheld devices whee low power, sunlight readability, and wide angle viewing of high resolution, full color images are important. Devices targeted are electronic book, cell phones, pagers, etc.

这个小企业技术转让（STTR）第二阶段项目开发了一类新的手性材料，二氧戊环，它提供了前所未有的螺旋扭曲力。 当添加到双折射液晶中时，只需要百分之几的浓度就可以将双折射相位扭曲成具有光波波长周期性的紧密螺旋。 由于低浓度，手性添加剂不会稀释优化胆甾型显示器的亮度、对比度、速度和低操作电压所需的胆甾型材料的重要物理性质。 作为简单的分子结构，二氧戊环衍生物可以在左手和右手部分中合成，以首次使胆甾显示器能够使反射亮度几乎加倍，达到我们习惯于从纸上看到的亮度。第二阶段的研究既有基础部分，也有应用部分。 基本部分研究螺旋扭曲力及其与手性化合物和主体混合物的分子结构的关系。 该应用组件使用这些信息来设计和开发用于电子书和其他手持设备的先进胆甾显示器的手性添加剂。手性材料将用于主要用于手持设备的显示产品，其中低功耗，阳光可读性和高分辨率，全色图像的广角观看是重要的。 目标设备是电子书、手机、寻呼机等。