公开(公告)号：US08956548B2

公开(公告)日：2015-02-17

申请号：US13635334

申请日：2011-03-15

申请人： Terry Victor Clapp ,  William Alden Crossland ,  Anthony Bernard Davey ,  Martin Grasmann ,  Jonathan Paul Hannington ,  Russell Keith King ,  Mikhael Pivnenko ,  Steven Robson ,  Huan Xu

发明人： Terry Victor Clapp ,  William Alden Crossland ,  Anthony Bernard Davey ,  Martin Grasmann ,  Jonathan Paul Hannington ,  Russell Keith King ,  Mikhael Pivnenko ,  Steven Robson ,  Huan Xu

IPC分类号： C09K19/04 ,  C09K19/38 ,  C09K19/54 ,  C09K19/58 ,  C09K19/60 ,  G02F1/137 ,  C09K19/40 ,  C09K19/42 ,  C09K19/52

CPC分类号： C09K19/60 ,  C09K19/406 ,  C09K19/408 ,  C09K19/42 ,  C09K19/52 ,  C09K19/54 ,  C09K19/58 ,  C09K2019/0444 ,  G02F1/13781

摘要： The present, invention relates to liquid crystal compositions having a smectic A structure for use in an optical device in which the composition is sandwiched between a pair of electrodes (12-15). In essence the composition includes a siloxane oligomer (component (a)) which may be seen to construct a layered SmA system of particular spacing and “strength”. Within this structure a low molar mass nematic mesogen (component (c)) is provided that may be considered to be that of a “plasticiser” which moderates the layer “strength”, while simultaneously providing tuneability to the properties of the composition, e.g. its refractive index or dielectric anisotropy. The addition of a side chain liquid crystal polysiloxane (component (d)) allows such systems to be further moderated since they can be considered as binding together the la>¾rs, both within a given layer and between layers. An ionic dopant (component (b)) is also included in the composition that migrates through the composition when low frequency electric fields are applied to the composition by the electrodes, thereby disrupting the order to the composition. Order in the composition can be restored by applying a higher frequency field that does not allow the dopant time to migrate significantly. Chromophores may also be included in the formulation.

摘要翻译： 本发明涉及具有将组合物夹在一对电极（12-15）之间的光学装置中使用的具有近晶A结构的液晶组合物。 本质上该组合物包括硅氧烷低聚物（组分（a）），其可以被看作构建具有特定间距和“强度”的层状SmA体系。 在该结构中，提供了低摩尔质量向列型介晶（组分（c）），其可以被认为是调节层“强度”的“增塑剂”，同时为组合物的性质提供可调性，例如。 其折射率或介电各向异性。 侧链液晶聚硅氧烷（组分（d））的添加允许这种体系进一步缓和，因为它们可以被认为在给定层内和层之间结合在一起。 当通过电极将低频电场施加到组合物上时，离子掺杂剂（组分（b））也包括在组合物中迁移通过组合物，从而破坏组合物的顺序。 可以通过施加不允许掺杂剂时间显着迁移的较高频率场来恢复组合物中的顺序。 发色团也可以包括在制剂中。

公开(公告)号：US20130155340A1

公开(公告)日：2013-06-20

申请号：US13635334

申请日：2011-03-15

申请人： Terry Victor Clapp ,  William Alden Crossland ,  Anthony Bernard Davey ,  Martin Grasmann ,  Jonathan Paul Hannington ,  Russell Keith King ,  Mikhael Pivnenko ,  Steven Robson ,  Huan Xu

发明人： Terry Victor Clapp ,  William Alden Crossland ,  Anthony Bernard Davey ,  Martin Grasmann ,  Jonathan Paul Hannington ,  Russell Keith King ,  Mikhael Pivnenko ,  Steven Robson ,  Huan Xu

IPC分类号： C09K19/60 ,  C09K19/58 ,  G02F1/137

CPC分类号： C09K19/60 ,  C09K19/406 ,  C09K19/408 ,  C09K19/42 ,  C09K19/52 ,  C09K19/54 ,  C09K19/58 ,  C09K2019/0444 ,  G02F1/13781

摘要： The present, invention relates to liquid crystal compositions having a smectic A structure for use in an optical device in which the composition is sandwiched between a pair of electrodes (12-15). In essence the composition includes a siloxane oligomer (component (a)) which may be seen to construct a layered SmA system of particular spacing and “strength”. Within this structure a low molar mass nematic mesogen (component (c)) is provided that may be considered to be that of a “plasticiser” which moderates the layer “strength”, while simultaneously providing tuneability to the properties of the composition, e.g. its refractive index or dielectric anisotropy. The addition of a side chain liquid crystal polysiloxane (component (d)) allows such systems to be further moderated since they can be considered as binding together the la>¾rs, both within a given layer and between layers. An ionic dopant (component (b)) is also included in the composition that migrates through the composition when low frequency electric fields are applied to the composition by the electrodes, thereby disrupting the order to the composition. Order in the composition can be restored by applying a higher frequency field that does not allow the dopant time to migrate significantly. Chromophores may also be included in the formulation.

摘要翻译： 本发明涉及具有将组合物夹在一对电极（12-15）之间的光学装置中使用的具有近晶A结构的液晶组合物。 本质上该组合物包括硅氧烷低聚物（组分（a）），其可以被看作构建具有特定间距和“强度”的层状SmA体系。 在该结构中，提供了低摩尔质量向列型介晶（组分（c）），其可以被认为是调节层“强度”的“增塑剂”，同时为组合物的性质提供可调性，例如。 其折射率或介电各向异性。 侧链液晶聚硅氧烷（组分（d））的添加允许这种体系进一步缓和，因为它们可以被认为在给定层内和层之间结合在一起。 当通过电极将低频电场施加到组合物上时，离子掺杂剂（组分（b））也包括在组合物中迁移通过组合物，从而破坏组合物的顺序。 可以通过施加不允许掺杂剂时间显着迁移的较高频率场来恢复组合物中的顺序。 发色团也可以包括在制剂中。