中国发明专利：一种使用氟取代偶氮苯调控液晶反射颜色的方法

发明（设计）人：俞燕蕾，秦朗，韦嘉

申请人：复旦大学

专利号：ZL 201810745175.3

摘要：

本发明属于液晶材料技术领域，具体为一种使用氟取代偶氮苯调控液晶反射颜色的方法。本发明使用的氟取代偶氮苯具有多波长光响应的特点，能够在不同波长光的照射下发生不同程度的顺反异构反应。本发明将氟取代偶氮苯、手性掺杂剂和液晶基体按照一定比例混合均匀后，灌入液晶盒中；通过改变刺激光源的波长，可以实现液晶盒反射颜色为红、绿、蓝的精准调控。本发明的调控方法利用光稳态来控制液晶反射颜色，突破了传统方法利用过渡态来调控反射颜色的局限。本发明可应用于液晶显示、光逻辑开关、光存储、防伪等众多领域。

Abstract：

The invention belongs to the technical field of liquid crystal materials, in particular to a method for controlling a liquid crystal reflection color by using fluorine substituted azobenzene. The fluorine substituted azobenzene used in the method has the characteristic of multi-wavelength light response, and the cis-trans isomerization reaction with different degrees of the fluorine substituted azobenzene can be carried out under the irradiation of different wavelength lights. According to the method, the fluorine substituted azobenzene, a chiral dopant and a liquid crystal matrix are evenly mixed in a certain proportion, and then the mixture is poured into a liquid crystal cell. By changing a wavelength of a stimulus light source, the precise regulation of the reflection color of the liquid crystal cell to be red, green and blue can be realized. The control method uses the light steady state to control the liquid crystal reflection color, and the limitation of a traditional method that the transition state is used to control the reflection color is broken through. The method can be applied to numerous fields, such as liquid crystal display, optical logic switch, optical storage, anti-counterfeiting, and the like.