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    • 4. 发明公开
    • Liquid crystal apparatus and chiral smectic liquid crystal composition for use therein
    • 其中使用的液晶装置和手性近晶液晶组合物
    • EP0406705A3
    • 1992-09-30
    • EP90112366.1
    • 1990-06-28
    • CANON KABUSHIKI KAISHA
    • Terada, Masahiro, c/o Canon Kabushiki KaishaYamashita, Masataka, c/o Canon Kabushiki KaishaMori, Shosei, c/o Canon Kabushiki KaishaNakamura, Shinichi, c/o Canon Kabushiki KaishaShinjo, Kenji, c/o Canon Kabushiki KaishaKatagiri, Kazuharu, c/o Canon Kabushiki Kaisha
    • G09G3/36G02F1/137C09K19/34
    • C09K19/02G09G3/3629G09G2310/06G09G2320/041
    • A liquid crystal apparatus includes: a liquid crystal cell comprising a pair of substrates having thereon a first electrode and a second electrode, respectively, disposed opposite to each other, and a chiral smectic liquid crystal showing a first and a second orientation state disposed between the first and second electrodes, and a drive circuit for applying voltages between the first and second electrodes including voltages |V S | and |V I | which provide voltages V A and V B (V B > V A ) satisfying the relationship of: |(V A -V B )/(V A +V B )| > 0.1 at 40 °C, wherein V A is a minimum peak value of a voltage |V S | + |V I | (at a constant pulse width) capable of inverting the first orientation state of the chiral smectic liquid crystal into the second orientation state when a voltage pulse is applied between the first and second electrodes to cause the first orientation state of the chiral smectic liquid crystal and then the voltage |V S | + |V I | is applied between the first and second electrodes as a combination of a voltage |V S | applied to the first electrode and a voltage -|V I | applied to the second electrode; and V B is a value of |V S | + |V I | calculated based on a maximum peak value of a voltage |V S | - |V I | (at a constant pulse width) capable of maintaining the first orientation state of the chiral smectic liquid crystal when a voltage pulse is applied between the first and second electrodes to cause the first orientation state and then the voltage |V S | - |V I | is applied between the first and second electrodes as a combination of a voltage |V S | applied to the first electrode and a voltage |V I | applied to the second electrode.
    • 本发明提供一种液晶装置,其包括:液晶单元,其包括一对基板,在该一对基板上分别设置有彼此相对的第一电极和第二电极;以及手性近晶型液晶,其显示第一和第二取向状态, 第一和第二电极以及用于在包括电压| VS |的第一和第二电极之间施加电压的驱动电路 和| VI | 其提供满足|(VA-VB)/(VA + VB)|的关系的电压VA和VB(VB> VA) 在40℃时> 0.1,其中VA是电压| VS |的最小峰值 + | VI | (以恒定的脉冲宽度),当在第一和第二电极之间施加电压脉冲以引起手性层列型液晶的第一取向状态时,能够将手性近晶型液晶的第一取向状态转化为第二取向状态;以及 然后电压| VS | + | VI | 作为电压| VS |的组合施加在第一和第二电极之间 施加到第一电极和电压 - | VI | 施加到第二电极; VB是| VS |的值 + | VI | 根据电压| VS |的最大峰值计算得出 - | VI | (恒定脉冲宽度),当在第一电极和第二电极之间施加电压脉冲以引起第一取向状态时,能够维持手性层列型液晶的第一取向状态,然后电压| VS | - | VI | 作为电压| VS |的组合施加在第一和第二电极之间 施加到第一电极和电压| VI | 施加到第二电极。
    • 6. 发明公开
    • Liquid crystal composition, liquid crystal device, display apparatus and display method
    • Flüssigkristallzusammensetzung,Flüssigkristallvorrichtung,Anzeigevorrichtung sowie Anzeigemethode。
    • EP0500072A1
    • 1992-08-26
    • EP92102754.6
    • 1992-02-19
    • CANON KABUSHIKI KAISHA
    • Mori, Shosei, c/o Canon Kabushiki KaishaYamashita, Masataka, c/o Canon Kabushiki KaishaKatagiri, Kazuharu, c/o Canon Kabushiki KaishaShinjo, Kenji, c/o Canon Kabushiki KaishaTerada, Masahiro, c/o Canon Kabushiki Kaisha
    • C09K19/34C09K19/46C09K19/42C09K19/44
    • C09K19/42C09K19/3491C09K19/3497C09K19/44C09K19/46
    • A liquid crystal composition, comprising: at least one mesomorphic compound represented by the following formula (I):

      wherein R¹ and R² independently denote a linear or branched alkyl group having 1 - 18 carbon atoms capable of including one or non-neighboring two or more methylene groups which can be replaced with at least one species of -O-, -CO-, -COO-, -OCO-, -OCOO-or -CH(X)- with the proviso that -O- cannot directly be connected to -O- and X denotes halogen; Z¹ denotes -COO- or -CH₂O-; X¹ and X² independently denote a single bond, -O-, -COO-, -OCO-, -CO- or -OCOO-; A¹ denotes a single bond,


      Y¹ and Y² independently denote hydrogen, halogen, -CH₃- or CF₃-; and at least one mesomorphic compound represented by the following formula (II):

      wherein R³ and R⁴ independently denote a linear or branched alkyl group having 1 - 18 carbon atoms capable of including one or non-neighboring two or more methylene groups which can be replaced with at least one species of -O-, -CO-, -COO-, -OCO-, -OCOO-or -CH(X)- with the proviso that -O- cannot directly be connected to -O- and X denotes halogen; X³ and X⁴ independently denotes a single bond, -O-, -COO-, -OCO-or -CO-; Z² denotes a single bond, -COO- or -OCO-; A², A³ and A⁴ independently denote a single bond,


      Y³ and Y⁴ independently denote hydrogen, halogen, -CH₃ or -CF₃; and k is 0 or 1 with the proviso that X³ is a single bond when A² is a single bond, and X⁴ is a single bond when A³ is a single bond and k is 0. The liquid crystal composition is easily aligned by a simple rubbing method to provide a uniform monodomain and further provides wider driving voltage and temperature margins effective for providing a practical ferroelectric liquid crystal device.
    • 一种液晶组合物,其包含:由下式(I)表示的至少一种介晶化合物:其中R 1和R 2独立地表示可以具有1至18个碳原子的直链或支链烷基, 包括可被至少一个-O - , - CO - , - COO - , - OCO - , - OOOO - 或-CH(X) - 代替的一个或不相邻的两个或多个亚甲基,条件是 -O-不能直接与-O-连接,X表示卤素; Z 1表示-COO-或-CH 2 O-; X 1和X 2独立地表示单键,-O - , - COO-,-OCO-,-CO-或-OCOO-; A <1>表示单键, CHEM> Y 1和Y 2独立地表示氢,卤素,-CH 3 - 或CF 3 - ; 和由下式(II)表示的至少一种介晶化合物:其中R 3和R 4独立地表示可以包括一个或不相邻的具有1至18个碳原子的直链或支链烷基 可以被至少一个-O - , - CO - , - COO-,-OCO-,-OCOO-或-CH(X)取代的两个或多个亚甲基,条件是-O-不能直接 与-O-连接,X表示卤素; X 3和X 4独立地表示单键,-O - , - COO - , - OCO-或-CO-; Z 2表示单键,-COO-或-OCO-; A 2,A 3和A 4独立地表示单键, CHEM> Y 3和Y 4独立地表示氢,卤素,-CH 3或-CF 3; 且当A 2为单键时,X为单键,并且当A 3为单键且X为单键时,X 4为单键,且k为0时,k为0或1,条件是X 3为单键 液晶组合物通过简单的摩擦方法容易地排列以提供均匀的单畴,并且进一步提供有效用于提供实际的铁电液晶装置的较宽的驱动电压和温度裕度。
    • 10. 发明公开
    • Liquid crystal composition, liquid crystal device, display apparatus and display method
    • 液晶组成物,液晶装置,显示装置及显示方法
    • EP0499252A1
    • 1992-08-19
    • EP92102414.7
    • 1992-02-13
    • CANON KABUSHIKI KAISHA
    • Mori, Shosei, c/o Canon Kabushiki KaishaYamashita, Masataka, c/o Canon Kabushiki KaishaKatagiri, Kazuharu, c/o Canon Kabushiki KaishaShinjo, Kenji, c/o Canon Kabushiki KaishaTerada, Masahiro, c/o Canon Kabushiki Kaisha
    • C09K19/34C09K19/46C09K19/42C09K19/44
    • C09K19/46C09K19/348C09K19/3491C09K19/3497C09K19/42C09K19/44
    • A liquid crystal composition, comprising: at least one mesomorphic compound represented by the following formula (I):

      wherein R¹ and R² independently denote a linear or branched alkyl group having 1 - 18 carbon atoms capable of including one or non-neighboring two or more methylene groups which can be replaced with at least one species of -O-, -CO-, -COO-, -OCO-, -OCOO- or -CH(X)- with the proviso that -O- cannot directly be connected to -O- and X denotes halogen; Z¹ denotes -COO- or -CH₂O-; X¹ and X² independently denote a single bond, -O-, -COO-, -OCO-, -CO- or -OCOO-; A¹ denotes a single bond,

      Y¹ and Y² independently denote hydrogen, halogen, -CH₃- or CF₃-; and at least one mesomorphic compound represented by the following formula (II):



              R³-X³-A²-B-A³-X⁴-R⁴   (II),



      wherein R³ and R⁴ independently denote a linear or branched alkyl group having 1 - 18 carbon atoms capable of including one or non-neighboring two or more methylene groups which can be replaced with at least one species of -O-, -CO-, -COO-, -OCO-, -OCOO- or -CH(X)- with the proviso that -O- cannot directly be connected to -O- and X denotes halogen; X³ and X⁴ independently denotes a single bond, -O-, -COO-, -OCO- or -CO-; B denotes

      A² denotes a single bond,

      A³ denotes a single bond, -A⁴- or -A⁴-A⁵- wherein A⁴ and A⁵ independently denote A²,

      and Y³ and Y⁴ independently denote hydrogen, F, Cl, Br, -CH₃, -CN or -CF₃. The liquid crystal composition is easily aligned by a simple rubbing method to provide a uniform monodomain and further provides wider driving voltage and temperature margins effective for providing a practical ferroelectric liquid crystal device.
    • 一种液晶组合物,它包括:至少一种由下式(Ⅰ)表示的介晶化合物:其中R 1和R 2独立地表示具有1-18个碳原子的直链或支链烷基,能够包括一个或不相邻的两个或多个 亚甲基,其可以被-O - , - CO - , - COO - , - OCO - , - OCOO-或-CH(X)中的至少一种取代 - 条件是-O-不能直接连接到 -O-并且X表示卤素; Z 1表示-COO-或-CH 2 O-; X 1和X 2独立地表示单键,-O - , - COO - , - OCO - , - CO-或-OCOO-; A 1代表单键,Y 1和Y 2分别代表氢,卤素,-CH 3 - 或CF 3 - 和至少一种由下式(Ⅱ)表示的介晶化合物:R 3 -X 3 -A 2 -B-A 3 -X 4 -R 4(Ⅱ),其中R 3和R 4分别代表具有1-18个碳原子的直链或支链烷基 能够包括一个或非相邻的两个或多个可以被-O - , - CO - , - COO - , - OCO - , - OCOO-或-CH(X) - 中的至少一种取代的亚甲基与 条件是-O-不能直接连接到-O-并且X表示卤素; X 3和X 4独立地表示单键,-O - , - COO - , - OCO-或-CO-; B表示A 2表示单键,A 3表示单键,-A 4 - 或-A 4 -A 5 - ,其中A 4和A 5分别表示A 2,Y 3和Y 4分别表示氢,F,Cl,Br,-CH 3,-CN 或-CF 3。 液晶组合物通过简单的摩擦方法容易地取向,以提供均匀的单畴,并进一步提供更有效的驱动电压和温度裕度,以提供实用的铁电液晶装置。