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    • 21. 发明授权
    • Optical change-over switch utilizing ferroelectric liquid crystal
material
    • 利用铁电液晶材料的光转换开关
    • US4836657A
    • 1989-06-06
    • US940491
    • 1986-12-10
    • Yasuhiro GunjiSadayuki OkadaMasato IsogaiKatsumi KondoMasahiko IbamotoKazuhiro KuwabaraAtsushi Kanke
    • Yasuhiro GunjiSadayuki OkadaMasato IsogaiKatsumi KondoMasahiko IbamotoKazuhiro KuwabaraAtsushi Kanke
    • G02F1/1333G02F1/141
    • G02F1/1326G02F1/141
    • The liquid crystal cell (30) for the optical change-over switch comprises a pair of transparent substrates (1), a pair of transparent flat electrodes (2) provided on the respective opposing surfaces of the substrates, orientation control films (3) provided on the flat electrodes (2), two pair of comb shaped electrodes (33) respectively provided on the orientation control films (3), and a ferroelectric liquid crystal layer (4) confined between the substrates (1). The optical incidence plane (31) to the cell (30) is so selected that the plane (31) is away from the helical axes (9) of the ferroelectric liquid crystal in the cell (30) in the order of somewhat greater than the tilt angle (.theta..sub.t) of the ferroelectric liquid crystal. The pair of flat electrodes (2) generate a first electric field (37a) perpendicular to the layer (32) and orient the long axes of the ferroelectric liquid crystal molecules into a first orientation (35a') parallel to the layer (32 ) to induce a first refractive index which causes simultaneous reflection of unpolarized light beam (7+8) with a predetermined incidence angle (.theta.). The two pair of comb shaped electrodes (33) generate a second electric field (37b') parallel to the layer and perpendicular to the helical axes (9) and orient the long axes of the molecules into a second orientation (35b') not in parallel to the layer (32) to induce a second refractive index which causes simultaneous transmission of the unpolarized light beam (7+8) with the predetermined incidence angle (.theta.).
    • 用于光转换开关的液晶单元(30)包括一对透明基板(1),设置在基板的相应相对表面上的一对透明平板电极(2),提供定向控制膜 在平面电极(2)上,分别设置在取向控制膜(3)上的两对梳状电极(33)和限制在基板(1)之间的铁电液晶层(4)。 选择细胞(30)的光入射平面(31),以使得平面(31)以略大于细胞(30)的大小的顺序远离细胞(30)中的铁电液晶的螺旋轴(9) 铁电液晶的倾斜角(θt)。 一对扁平电极(2)产生垂直于层(32)的第一电场(37a),并将铁电液晶分子的长轴定向成与层(32)平行的第一取向(35a')至 诱导第一折射率,其引起非偏振光束(7 + 8)以预定入射角(θ)的同时反射。 两对梳状电极(33)产生平行于该层并垂直于螺旋轴(9)的第二电场(37b'),并使分子的长轴定向成不在第二取向(35b') 平行于层(32)以诱导第二折射率,其引起非偏振光束(7 + 8)以预定入射角(θ)的同时透射。
    • 22. 发明授权
    • Optical modulation element with surface parallel and unidirectional
alignment of LC
    • 具有LC的表面平行和单向对准的光学调制元件
    • US4586791A
    • 1986-05-06
    • US482640
    • 1983-04-06
    • Masato IsogaiKishiro IwasakiFumio Nakano
    • Masato IsogaiKishiro IwasakiFumio Nakano
    • C09K19/22G02F1/133G02F1/1337G02F1/135G02F1/137G02F1/141G02F1/13C09K19/56
    • G02F1/133711C09K19/22G02F1/135G02F1/141
    • A liquid crystal optical modulation element is disclosed. The modulation element comprises two transparent substrates positioned so as to face each other; a transparent electrode provided on the facing surface of the transparent substrates; a transparent insulating/orientation control layer provided on each of the facing surfaces of the transparent electrodes, having insulating properties and orientating the liquid crystal molecules in the proximity thereof in a preferential direction substantially parallel to the surfaces of the substrates; a liquid crystal layer exhibiting ferroelectricity, sandwiched between the insulating/orientation control layers; and means for polarizing light passing through said liquid crystal layer.The liquid crystal optical modulation element of the present invention is produced by the steps of coating transparent electrodes onto transparent sbstrates; coating polyimide films so as to cover the transparent electrodes; rubbing the polyimide coating films; positioning the transparent substrates parallel to each other so that the rubbed polyimide coating films face each other so that a liquid crystal cell is thereby assembled; introducing a liquid crystal exhibiting ferroelectricity into the cell thus formed and sealing the cell; and providing polarizers on the external surfaces of the substrates.
    • 公开了一种液晶光调制元件。 调制元件包括两个彼此面对的透明基板; 设置在透明基板的面对面上的透明电极; 透明绝缘/取向控制层,设置在透明电极的每个面对表面上,具有绝缘性质,并使液晶分子靠近基板平行于基板的优先方向; 表现出铁电性的液晶层,夹在绝缘/取向控制层之间; 以及用于使通过所述液晶层的光偏振的装置。 本发明的液晶光调制元件通过以下步骤制造:将透明电极涂覆在透明的基板上; 涂覆聚酰亚胺膜以覆盖透明电极; 摩擦聚酰亚胺涂膜; 将透明基板彼此平行地定位,使得摩擦的聚酰亚胺涂膜彼此面对,从而组装液晶单元; 将如此形成的电池引入表现出铁电性的液晶并密封电池; 并在基板的外表面上提供偏振器。