公开(公告)号：US5211876A

公开(公告)日：1993-05-18

申请号：US546290

申请日：1990-06-29

申请人： Nuno A. Vaz ,  Thomas H. Van Steenkiste ,  George W. Smith ,  George P. Montgomery, Jr.

发明人： Nuno A. Vaz ,  Thomas H. Van Steenkiste ,  George W. Smith ,  George P. Montgomery, Jr.

IPC分类号： C09K19/54 ,  G02F1/1334

CPC分类号： C09K19/544 ,  G02F1/1334

摘要： Liquid crystal films are potentially useful for automotive displays and for automotive windows and sunroofs with variable optical transmission. The present invention provides a liquid crystal material having an extended wavelength response and a method for making the same. The size of the liquid crystal microdroplets within the material are controlled such that a polydisperse liquid crystal film is formed. Controlling the curing parameters during the cure of a supersaturated mixture of liquid crystal in polymer precursor allows for the fabrication of a polymer-dispersed liquid crystal material containing a multimodal distribution of microdroplet sizes which provides a film acting as both as a visible light shutter and a strong scattered of infrared radiation.

摘要翻译： 液晶膜对于汽车显示器和具有可变光传输的汽车窗户和天窗来说是潜在的。 本发明提供一种具有延长的波长响应的液晶材料及其制造方法。 控制材料内的液晶微滴的尺寸，使得形成多分散液晶膜。 在固化聚合物前体中的液晶的过饱和混合物期间控制固化参数允许制备聚合物分散的液晶材料，其包含微滴尺寸的多峰分布，其提供作为可见光快门的薄膜和 强散射的红外辐射。

公开(公告)号：US5225104A

公开(公告)日：1993-07-06

申请号：US668010

申请日：1991-03-12

申请人： Thomas H. Van Steenkiste ,  Nuno A. Vaz ,  George P. Montgomery, Jr. ,  George W. Smith

发明人： Thomas H. Van Steenkiste ,  Nuno A. Vaz ,  George P. Montgomery, Jr. ,  George W. Smith

IPC分类号： C09K19/54 ,  G02F1/1334

CPC分类号： G02F1/1334 ,  C09K19/544

摘要： A film of a polymer dispersed liquid crystal material having improved light scattering and solar attenuation properties, which utilizes a significantly reduced amount of the liquid crystal component as compared to conventional polymer dispersed liquid crystal films, is provided. These improved properties are obtained by the addition of preferably up to about three volume percent of an organic photoaccelerator chosen from the group of amines or aminobenzoates, to the liquid crystal-polymer precursor mixture prior to curing of the mixture.

摘要翻译： 提供了一种具有改进的光散射和太阳衰减特性的聚合物分散液晶材料的薄膜，其与传统的聚合物分散液晶膜相比利用显着减少的液晶组分量。 这些改进的性能是通过在固化混合物之前向液晶聚合物前体混合物中加入优选最多约3体积％的选自胺或氨基苯甲酸酯的有机光加速剂获得的。

公开(公告)号：US4775226A

公开(公告)日：1988-10-04

申请号：US880009

申请日：1986-06-30

申请人： George P. Montgomery, Jr. ,  Nuno A. Vaz

发明人： George P. Montgomery, Jr. ,  Nuno A. Vaz

IPC分类号： C09K19/54 ,  G02F1/133 ,  G02F1/1334 ,  G11B7/24 ,  G02F1/137

CPC分类号： G02F1/132 ,  C09K19/544 ,  G02F1/1334 ,  G11B7/24

摘要： A method of creating memory effect in an optically responsive film containing smectic liquid crystal microdroplets dispersed in a polymeric film by first heating it to a higher temperature such that the structure of the liquid crystal is transformed into an isotropic phase, and then cooling the liquid crystal from that higher temperature in an electric field of sufficient intensity such that the liquid crystal microdroplets remain in an aligned state of the smectic phase for a sufficiently long period of time.

摘要翻译： 通过首先将其加热到更高的温度使得液晶的结构转变为各向同性相，然后冷却液晶的方法，在含有分散在聚合物膜中的近晶液晶微滴的光学响应膜中产生记忆效应的方法 从足够强度的电场中的较高温度使得液晶微滴保持在近晶相的对准状态足够长的时间段。