利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

22 条记录 (耗时 0.057 秒)

    Liquid crystal formulations and structures for smectic A optical devices
    7.
    发明授权
    Liquid crystal formulations and structures for smectic A optical devices 有权
    用于近晶A光学器件的液晶配方和结构

    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。

    Liquid Crystal Formulations And Structures For Smectic A Optical Devices
    8.
    发明申请
    Liquid Crystal Formulations And Structures For Smectic A Optical Devices 有权
    液晶配方和结构光电器件

    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。

    Smectic A Compositions For Use in Optical Devices
    10.
    发明申请
    Smectic A Compositions For Use in Optical Devices 有权
    用于光学器件的平面组件

    公开(公告)号：US20130342773A1

    公开(公告)日：2013-12-26

    申请号：US13978805

    申请日：2012-01-09

    申请人： Daping Chu ,  Huan Xu ,  William Alden Crossland ,  Anthony Bernard Davey

    发明人： Daping Chu ,  Huan Xu ,  William Alden Crossland ,  Anthony Bernard Davey

    IPC分类号： C09K19/58 ,  G02F1/1333

    CPC分类号： G02F1/1333 ,  C09K19/02 ,  C09K19/408 ,  C09K19/52 ,  C09K19/582

    摘要： A liquid crystal smectic A composition that can be switched by the application of different electric fields across it between a first stable state (left hand block in FIG. 4) and at least one second stable state (right hand block in FIG. 4) in which the composition is less ordered than in the first state. The radiation transmission properties of the first and second states are different. The composition comprises: (A) a liquid crystal material that has a positive dielectric anisotropy and that is a uniformly aligned smectic A structure when in the first state; (B) an ionic dopant giving a negative conductivity anisotropy in the liquid crystal material so that it is capable of disrupting the smectic A structure of the first state when subject to an electric field that causes the dopant to migrate through the composition, thereby causing the composition to switch into said at least one second state, and (C) optically anisotropic pigment particles having positive dielectric anisotropy dispersed in the composition, the largest dimension of the pigment particles being in the range of 10 nm to 1 μm. The composition, when in the first relatively stable state, is capable of undergoing smectic dynamic scattering due to electro-hydrodynamic instability under the influence of a sufficiently low frequency AC field, thereby disordering the liquid crystals and the pigment particles and thereby discouraging the pigment particles from aggregating together. The composition is suitable for use in displays and is especially resistant to degradation by ambient light and so can be used in outside applications.

    摘要翻译： 液晶近晶A组合物，其可以通过在第一稳定状态（图4中的左侧块）和至少一个第二稳定状态（图4中的右侧块）之间施加不同的电场来切换 其组成不如第一状态那么有序。 第一和第二状态的辐射传播特性不同。 该组合物包含：（A）具有正介电各向异性且当处于第一状态时为均匀取向的近晶A结构的液晶材料; （B）在液晶材料中具有负电导率各向异性的离子掺杂剂，使得当受到使掺杂剂迁移通过组合物的电场时能够破坏第一状态的近晶A结构，从而导致 组成切换到所述至少一个第二状态，和（C）具有分散在组合物中的正介电各向异性的光学各向异性颜料颗粒，颜料颗粒的最大尺寸在10nm至1μm的范围内。 当处于第一相对稳定状态时，由于在足够低频率的AC场的影响下由于电流动力学不稳定性，组合物能够发生近晶的动态散射，从而使液晶和颜料颗粒失调，从而阻止颜料颗粒 从聚合在一起。 该组合物适用于显示器，并且特别耐环境光降解，因此可用于外部应用。