Ferroelectric liquid crystal optical device having temperature
compensation
    71.
    发明授权
    Ferroelectric liquid crystal optical device having temperature compensation 失效
    具有温度补偿的铁电液晶光学器件

    公开(公告)号:US4902107A

    公开(公告)日:1990-02-20

    申请号:US352609

    申请日:1989-05-15

    IPC分类号: G02F1/133 G09G3/36

    摘要: A liquid crystal device, includes: (a) a liquid crystal cell includes a pair of base plates, and a ferroelectric smectic liquid crystal having a negative dielectric anisotropy, (b) a device for applying to the ferroelectric liquid crystal an alternating electric field capable of causing the crystal to assume at least two stable orientation states including a first stable orientation state and a second stable orientation state, (c) a device for changing the frequency or voltage value of the alternating electric field corresponding to a temperature change, (d) a device for selectively applying a first electric field for orienting the ferroelectric liquid crystal to the first stable orientation state and a second electric field for orienting the ferroelectric liquid crystal to the second stable orientation state, and (e) a device for detecting an optical difference between light rays having passed through the ferroelectric liquid crystal oriented to the first orientation state and light rays having passed through the ferroelectric liquid crystal oriented to the second orientation state.

    摘要翻译: 一种液晶装置,包括:(a)液晶单元,包括一对基板和具有负介电各向异性的铁电近晶液晶,(b)用于向铁电液晶施加交变电场的装置, 使晶体呈现包括第一稳定取向状态和第二稳定取向状态的至少两个稳定取向状态,(c)用于改变对应于温度变化的交变电场的频率或电压值的装置,(d )用于选择性地施加用于将铁电液晶定向到第一稳定取向状态的第一电场和用于将铁电液晶定向到第二稳定取向状态的第二电场的装置,以及(e)用于检测光学 已经通过了朝向第一取向状态的铁电液晶的光线与光r之间的差 ays已通过铁电液晶取向为第二取向状态。

    Ferroelectric liquid crystal device
    72.
    发明授权
    Ferroelectric liquid crystal device 失效
    铁电液晶装置

    公开(公告)号:US4783148A

    公开(公告)日:1988-11-08

    申请号:US98318

    申请日:1987-09-18

    摘要: A ferroelectric liquid crystal device is by disposing between a pair of substrates a ferroelectric liquid crystal composition showing a phase transition series of isotropic.fwdarw.chiral nematic phase (N.sup.*).fwdarw.chiral smectic C phase on temperature decrease. The alignment state of the liquid crystal is improved by forming alignment control films of mutually different materials on the pair of substrates. The alignment state is improved especially when the liquid crystal composition is formulated to show a helical pitch in N.sup.* phase which exceeds three times the spacing between the pair of substrates.

    摘要翻译: 强电介质液晶装置是通过在一对基板之间配置表现出各向同性 - >手性向列相(N *)→手性近晶C相的相变系列温度降低的铁电液晶组合物。 通过在一对基板上形成相互不同的材料的取向控制膜来提高液晶的取向状态。 特别是当将液晶组合物配制成显示N×相的螺旋间距超过三对基板间距的三倍时,取向状态得到改善。