Liquid crystal composition, liquid crystal device and liquid crystal
apparatus
    22.
    发明授权
    Liquid crystal composition, liquid crystal device and liquid crystal apparatus 失效
    液晶组合物,液晶装置和液晶装置

    公开(公告)号:US5744059A

    公开(公告)日:1998-04-28

    申请号:US592180

    申请日:1996-01-26

    摘要: A liquid crystal composition contains a mesomorphic compound represented by the following formula (A): ##STR1## wherein R.sub.1 denotes a linear or branched alkyl group having 1-18 carbon atoms; X.sub.1 denotes a single bond, --O--, --CO--O-- or --O--CO--; X.sub.2 denotes a single bond, --OCH.sub.2 --, --CO--O-- or --O--CO--; n is an integer of 3-16; and A.sub.1, denotes ##STR2## and a mesomorphic compound represented by the following formula (B): ##STR3## wherein R.sub.2 denotes a linear or branched alkyl group having 1-18 carbon atoms; X.sub.3 and X.sub.4 independently denote a single bond, --O--, --CO--O-- or --O--CO--; m is an integer of 3-16; and A.sub.2 denotes ##STR4## The liquid crystal composition may preferably be formulated as a chiral smectic liquid crystal composition. The liquid crystal composition is useful in providing a liquid crystal device using the liquid crystal composition with a good alignment characteristic, a good drive characteristic, and a high contrast ratio.

    摘要翻译: 液晶组合物含有由下式(A)表示的介晶化合物:其中R 1表示具有1-18个碳原子的直链或支链烷基; X1表示单键,-O - , - CO-O-或-O-CO-; X2表示单键,-OCH2-,-CO-O-或-O-CO-; n为3-16的整数; (B)表示的介晶化合物:其中,R 2表示具有1-18个碳原子的直链或支链烷基; X3和X4独立地表示单键,-O - , - CO-O-或-O-CO-; m为3-16的整数; 并且A2表示作为手性近晶液晶组合物配制的 e。 液晶组合物可用于提供使用具有良好的取向特性,良好的驱动特性和高对比度的液晶组合物的液晶装置。

    Liquid crystal composition, liquid crystal device and liquid crystal
apparatus
    23.
    发明授权
    Liquid crystal composition, liquid crystal device and liquid crystal apparatus 失效
    液晶组合物,液晶装置和液晶装置

    公开(公告)号:US5710433A

    公开(公告)日:1998-01-20

    申请号:US592573

    申请日:1996-01-26

    摘要: A liquid crystal composition contains a mesomorphic compound represented by the following formula (A): ##STR1## wherein R.sub.1 and R.sub.2 independently denote a linear or branched alkyl group having 1-18 carbon atoms; X.sub.1 and X.sub.2 independently denote a single bond, --O--, --CO--O-- or --O--CO--; and A.sub.1 denotes a single bond, ##STR2## or ##STR3## and A.sub.2 denotes ##STR4## or ##STR5## and a mesomorphic compound represented by the following formula (B): ##STR6## wherein R.sub.3 denotes a linear or branched alkyl group having 1-18 carbon atoms; X.sub.3 and X.sub.4 independently denote a single bond, --O--, --CO--O-- or --O--CO--; m is an integer of 3-16; and A.sub.3 denotes ##STR7## or ##STR8## The liquid crystal composition may preferably be formulated as a chiral smectic liquid crystal composition. The liquid crystal composition is useful in providing a liquid crystal device using the liquid crystal composition with a good alignment characteristic, a good drive characteristic, and a high and stable contrast ratio.

    摘要翻译: 液晶组合物含有由下式(A)表示的介晶化合物:其中R 1和R 2分别表示具有1-18个碳原子的直链或支链烷基; X1和X2独立地表示单键,-O - , - CO-O-或-O-CO-; 并且A1表示单键,,A2表示,以及由下式(B)表示的介晶化合物:其中R 3表示直链或支链 具有1-18个碳原子的烷基; X3和X4独立地表示单键,-O - , - CO-O-或-O-CO-; m为3-16的整数; 并且A3表示。液晶组合物优选配制成手性近晶液晶组合物。 液晶组合物可用于提供使用具有良好取向特性,良好的驱动特性和高且稳定的对比度的液晶组合物的液晶装置。

    Liquid crystal device and liquid crystal display apparatus
    24.
    发明授权
    Liquid crystal device and liquid crystal display apparatus 失效
    液晶显示装置及液晶显示装置

    公开(公告)号:US5460749A

    公开(公告)日:1995-10-24

    申请号:US172164

    申请日:1993-12-23

    IPC分类号: C09K19/34 G02F1/141 G02F1/13

    摘要: A liquid crystal device is constituted by disposing a chiral smectic liquid crystal between a pair of substrates each provided with an electrode and a uniaxial alignment film. The chiral smectic liquid crystal is placed in such a quasi-smectic A alignment state that the liquid crystal molecules will have a single average molecular axis under no electric field application on a lower temperature side within chiral smectic C phase range, wherein the single average molecular axis can be confirmed as a position providing the darkest state when observed through cross nicol polarizers. Such a quasi-smectic A alignment state is effective in providing a liquid crystal device (or display apparatus) having an improved shock resistance and a good low-temperature storage properties.

    摘要翻译: 液晶装置是通过在各自设置有电极的一对基板和单轴取向膜之间设置手性近晶液晶而构成的。 手性近晶液晶被置于这样的准近晶A取向状态,使得液晶分子在手性近晶C相范围内的低温侧无电场施加时将具有单个平均分子轴,其中单分子平均分子 当通过交叉尼龙偏振器观察时,可以将轴确认为提供最黑暗状态的位置。 这样的准近程A取向状态在提供具有改善的抗冲击性和良好的低温储存性的液晶装置(或显示装置)方面是有效的。

    Liquid crystal composition, liquid crystal device and liquid crystal
apparatus
    25.
    发明授权
    Liquid crystal composition, liquid crystal device and liquid crystal apparatus 失效
    液晶组合物,液晶装置和液晶装置

    公开(公告)号:US5458804A

    公开(公告)日:1995-10-17

    申请号:US65917

    申请日:1993-05-25

    摘要: A liquid crystal (composition) containing a ferroelectric liquid crystal shows a layer inclination angle .delta. in smectic phase providing a specific temperature dependence. The inclination angle .delta. increases on temperature decrease down to a mediate temperature and decreases on temperature decrease below the mediate temperature. The inclination angle .delta. keeps a positive value in an ambient temperature or starts to increase again on further temperature decrease before it reaches zero degrees. The liquid crystal (composition) is usable for providing a liquid crystal device or apparatus with decreased temperature dependences of driving conditions and improved low-temperature storage properties.

    摘要翻译: 含有铁电液晶的液晶(组合物)表现出具有特定温度依赖性的近晶相中的层倾斜角度δ。 倾斜角度δ随着温度的降低而增加到中间温度,并且在低于介质温度的温度下降时减小。 倾斜角度Δ在环境温度下保持正值,或者在其达到零度之前,在另外的温度降低时再次开始增加。 液晶(组合物)可用于提供具有降低的驱动条件的温度依赖性和改善的低温存储性能的液晶装置或装置。

    Image forming apparatus
    26.
    发明授权

    公开(公告)号:US5142325A

    公开(公告)日:1992-08-25

    申请号:US845252

    申请日:1992-03-03

    IPC分类号: G03G15/01 G03G15/08

    摘要: In an image forming apparatus in which toner is fed to a developer unit from a toner storage container through toner conveying means provided between the toner storage container and the developer unit, the image forming apparatus comprises a toner remaining amount detector for detecting not more than a predetermined amount of toner in the toner storage container, a toner density detector for detecting the density of toner in the developer unit, and means for interrupting the image forming operation to feed the toner to the developer unit from the toner storage container through the toner conveying means when the amount of the toner in the toner storage container is larger than the predetermined amount and the density detected by the toner density detector is lower than a predetermined density. Comsequently, suitable measures can be taken when there occurs such a state that no toner exists in the toner conveying means between the toner storage container and the developing mechanism even if the toner exists in the toner storage container.

    Liquid crystal device and liquid crystal apparatus
    28.
    发明授权
    Liquid crystal device and liquid crystal apparatus 失效
    液晶装置和液晶装置

    公开(公告)号:US5841497A

    公开(公告)日:1998-11-24

    申请号:US681350

    申请日:1996-07-23

    IPC分类号: C09K19/34 G02F1/1337

    摘要: A liquid crystal device is constituted by a pair of substrates each having thereon an electrode for voltage application, a chiral smectic liquid crystal composition disposed between the substrates so as to assume at least two optically stable states. At least one of the substrates is provided with an alignment control layer having a thickness of at most 200 .ANG. or comprising polyimide. The substrates have been subjected to different aligning treatments at their opposite faces each contacting the composition. The composition comprises at least three fluorine-containing mesomorphic compounds each comprising a fluorocarbon terminal portion and a hydrocarbon terminal portion, the terminal portions being connected with a central core, the compounds having smectic mesophase or latent smectic mesophase; said at least three mesomorphic compounds comprising a compound having a fluorocarbon terminal portion containing one catenary ether oxygen atom, a compound having a fluorocarbon terminal portion containing two catenary ether oxygen atoms, and a compound having a fluorocarbon terminal portion containing three catenary ether oxygen atoms. The above liquid crystal device is effective in improving a duration margin to provide good drive characteristic when driven.

    摘要翻译: 液晶装置由一对基板构成,每个基板上具有用于施加电压的电极,设置在基板之间的手性近晶液晶组合物,以呈现至少两个光学稳定状态。 至少一个基板设置有厚度最多为200或包含聚酰亚胺的取向控制层。 在各自的接触组合物的相对面上,基板已进行不同的取向处理。 所述组合物包含至少三种含氟介孔化合物,其各自包含碳氟化合物末端部分和烃末端部分,末端部分与中心核心连接,所述化合物具有近晶中间相或潜在的近晶相中间相; 所述至少三种介晶化合物包含具有含有一个链状醚氧原子的碳氟化合物末端部分的化合物,具有含有两个链状乙烯氧原子的碳氟化合物末端部分的化合物和具有含有三个链状醚氧原子的碳氟化合物末端部分的化合物。 上述液晶装置在驱动时有效地提高持续时间余量以提供良好的驱动特性。

    Liquid crystal composition, liquid crystal device and liquid crystal
apparatus
    29.
    发明授权
    Liquid crystal composition, liquid crystal device and liquid crystal apparatus 失效
    液晶组合物,液晶装置和液晶装置

    公开(公告)号:US5733475A

    公开(公告)日:1998-03-31

    申请号:US592176

    申请日:1996-01-26

    CPC分类号: C09K19/34 C09K19/46

    摘要: A liquid crystal composition contains a mesomorphic compound represented by the following formula (A): ##STR1## wherein R.sub.1 and R.sub.2 independently denote a linear or branched alkyl group having 1-18 carbon atoms; X.sub.1 denotes a single bond, --O--, --CO--O-- or --O--CO--; and A.sub.1 denotes ##STR2## and a mesomorphic compound represented by the following formula (B): ##STR3## wherein R.sub.3 denotes a linear or branched alkyl group having 1-18 carbon atoms; X.sub.2 denotes a single bond, --O--, --CO--O-- or --O--CO--; X.sub.3 denotes a single bond, --OCH.sub.2 --, --CO--O-- or --O--CO--; n is an integer of 3-16; and A.sub.2 denotes ##STR4## The liquid crystal composition may preferably be formulated as a chiral smectic liquid crystal composition. The liquid crystal composition is useful in providing a liquid crystal device using the liquid crystal composition with a good alignment characteristic, a good drive characteristic, and a high contrast ratio.

    摘要翻译: 液晶组合物含有由下式(A)表示的介晶化合物:其中R 1和R 2分别表示具有1-18个碳原子的直链或支链烷基; X1表示单键,-O-,-CO-O-或-O-CO-; A1表示下式(B)表示的介晶化合物:(B)其中,R3表示碳原子数为1〜18的直链或支链烷基; X2表示单键,-O - , - CO-O-或-O-CO-; X3表示单键,-OCH2-,-CO-O-或-O-CO-; n为3-16的整数; 并且A2表示E>液晶组合物优选配制为手性近晶液晶组合物。 液晶组合物可用于提供使用具有良好的取向特性,良好的驱动特性和高对比度的液晶组合物的液晶装置。

    Liquid crystal composition, liquid crystal device and liquid crystal
apparatus
    30.
    发明授权
    Liquid crystal composition, liquid crystal device and liquid crystal apparatus 失效
    液晶组合物,液晶装置和液晶装置

    公开(公告)号:US5709819A

    公开(公告)日:1998-01-20

    申请号:US592576

    申请日:1996-01-26

    CPC分类号: C09K19/46 C09K19/34

    摘要: A liquid crystal composition contains a mesomorphic compound represented by the following formula (A): ##STR1## wherein R.sub.1 denotes a linear or branched alkyl group having 1-18 carbon atoms; X.sub.1 denotes a single bond, --O--, --CO--O-- or --O--CO--; X.sub.2 denotes a single bond, --OCH.sub.2 --, --CO--O-- or --O--CO--; n is an integer of 3-16; and A.sub.1 denotes ##STR2## and a mesomorphic compound represented by the following formula (B): ##STR3## wherein R.sub.2 denotes a linear or branched alkyl group having 1-18 carbon atoms; X.sub.3 and X.sub.4 independently denote a single bond, --O--, --CO--O-- or --O--CO--; m is an integer of 3-16; and A.sub.2 denotes ##STR4## The liquid crystal composition may preferably be formulated as a chiral smectic liquid crystal composition. The liquid crystal composition is useful in providing a liquid crystal device using the liquid crystal composition with a good alignment characteristic, a good drive characteristic, and a high contrast ratio.

    摘要翻译: 液晶组合物含有由下式(A)表示的介晶化合物:其中R 1表示具有1-18个碳原子的直链或支链烷基; X1表示单键,-O - , - CO-O-或-O-CO-; X2表示单键,-OCH2-,-CO-O-或-O-CO-; n为3-16的整数; 和A1表示下式(B)表示的介晶化合物:其中R 2表示具有1-18个碳原子的直链或支链烷基; X3和X4独立地表示单键,-O - , - CO-O-或-O-CO-; m为3-16的整数; 并且A2表示作为手性近晶液晶组合物配制的 e。 液晶组合物可用于提供使用具有良好的取向特性,良好的驱动特性和高对比度的液晶组合物的液晶装置。