公开(公告)号：US06384887B1

公开(公告)日：2002-05-07

申请号：US09419753

申请日：1999-10-18

申请人： Akio Yasuda ,  Keiichi Nito ,  Eriko Matsui ,  Hidehiko Takanashi ,  Ying-Bao Yang

发明人： Akio Yasuda ,  Keiichi Nito ,  Eriko Matsui ,  Hidehiko Takanashi ,  Ying-Bao Yang

IPC分类号： G02F11337

CPC分类号： G02F1/141 ,  G02F1/133707 ,  G02F1/133711 ,  G02F1/133734 ,  G02F2001/133796 ,  G02F2203/30

摘要： A liquid crystal device comprises a pair of substrates and a liquid crystal provided between the paired substrates wherein domains whose threshold voltages are different from one another are finely distributed throughout the liquid crystal. In particular, the respective substrates each has a transparent electrode and an alignment film formed thereon in this order and the substrates are assembled to establish a given space therebetween, and a ferroelectric liquid crystal being injected into the given space wherein domains are finely distributed as set out above, thereby providing a a liquid crystal display device. The fine distribution is such that when a transmittance through inverted domains is 25%, the number of domains (microdomains) having a size of larger than 2 &mgr;m&phgr; in a field of 1 mm2 is not smaller than 300, preferably not smaller than 600, and the width of the threshold voltage within the domains is not smaller than 2 volts within a transmittance range of from 10 to 90%. The liquid crystal device, particularly the display device, keeps a high contrast and can easily, reliably realize an analog gray-side display at low costs.

摘要翻译： 液晶装置包括一对基板和设置在成对基板之间的液晶，其中阈值电压彼此不同的畴细分布在整个液晶中。 特别地，各基板各自具有依次形成在其上的透明电极和取向膜，并且基板被组装以在其间建立给定的间隔，并且将铁电液晶注入到给定的空间中，其中磁畴精细分布 从而提供一种液晶显示装置。 精细分布使得当通过反向结构域的透射率为25％时，在1mm 2的场中具有大于2mumphi的尺寸的域（微区域）的数量不小于300，优选不小于600，并且 在范围内的阈值电压的宽度在10至90％的透射率范围内不小于2伏特。 液晶装置，特别是显示装置，保持高对比度，并且能够以低成本容易地可靠地实现模拟灰度显示。

公开(公告)号：US6016133A

公开(公告)日：2000-01-18

申请号：US347245

申请日：1994-11-23

申请人： Keiichi Nito ,  Akio Yasuda ,  Hidehiko Takanashi ,  Ying Bao Yang

发明人： Keiichi Nito ,  Akio Yasuda ,  Hidehiko Takanashi ,  Ying Bao Yang

IPC分类号： G02F1/133 ,  G09G3/20 ,  G09G3/36 ,  C09K19/02 ,  G09G5/10

CPC分类号： G09G3/3637 ,  G09G2310/06 ,  G09G2310/061 ,  G09G2310/066 ,  G09G3/2011 ,  G09G3/2018 ,  G09G3/2074

摘要： A method of driving a liquid crystal device, which comprises matrix-addressed driving a liquid crystal device comprising a liquid crystal, particularly a ferroelectric liquid crystal, disposed between a pair of substrates and comprising finely distributed domains differing in threshold voltage for use in switching said liquid crystal, said method being a pulse modulation method comprising modulating at least one of pulse voltage and pulse width, a pixel electrode division method, or a time integration method. Also claimed is a liquid crystal device driven by any of said methods. The liquid crystal device provides a further improved analog multiple gray-scale level display, realizes a large-area display at a low cost, and enables drive at full color video rate.

摘要翻译： 一种驱动液晶装置的方法，包括矩阵寻址驱动液晶装置，该液晶装置包括液晶，特别是铁电液晶，该液晶装置设置在一对基板之间，并且包括精细分布的不同阈值电压的畴，用于切换所述 液晶，所述方法是脉冲调制方法，包括调制脉冲电压和脉冲宽度中的至少一个，像素电极分割方法或时间积分方法。 还要求保护的是由任何所述方法驱动的液晶装置。 液晶装置提供了进一步改进的模拟多灰度级显示器，以低成本实现了大面积显示，并且以全色视频速率实现驱动。

公开(公告)号：US06317111B1

公开(公告)日：2001-11-13

申请号：US09453101

申请日：1999-12-02

申请人： Keiichi Nito ,  Akio Yasuda ,  Hidehiko Takanashi ,  Ying Bao Yang

发明人： Keiichi Nito ,  Akio Yasuda ,  Hidehiko Takanashi ,  Ying Bao Yang

IPC分类号： G09G336

CPC分类号： G09G3/3637 ,  G09G3/2011 ,  G09G3/2018 ,  G09G3/2074 ,  G09G2310/06 ,  G09G2310/061 ,  G09G2310/066

摘要： A method of driving a liquid crystal device, which comprises matrix-addressed driving a liquid crystal device comprising a liquid crystal, particularly a ferroelectric liquid crystal, disposed between a pair of substrates and comprising finely distributed domains differing in threshold voltage for use in switching said liquid crystal, said method being a pulse modulation method comprising modulating at least one of pulse voltage and pulse width, a pixel electrode division method, or a time integration method. Also claimed is a liquid crystal device driven by any of said methods. The liquid crystal device provides a further improved analog multiple gray-scale level display, realizes a large-area display at a low cost, and enables drive at full color video rate.

摘要翻译： 一种驱动液晶装置的方法，包括矩阵寻址驱动液晶装置，该液晶装置包括液晶，特别是铁电液晶，该液晶装置设置在一对基板之间，并且包括精细分布的不同阈值电压的畴，用于切换所述 液晶，所述方法是脉冲调制方法，包括调制脉冲电压和脉冲宽度中的至少一个，像素电极分割方法或时间积分方法。 还要求保护的是由任何所述方法驱动的液晶装置。 液晶装置提供了进一步改进的模拟多灰度级显示器，以低成本实现了大面积显示，并且以全色视频速率实现驱动。

公开(公告)号：US5659411A

公开(公告)日：1997-08-19

申请号：US261342

申请日：1994-06-16

申请人： Keiichi Nito ,  Akio Yasuda ,  Nobue Kataoka ,  Hidehiko Takanashi ,  Eriko Matsui ,  Yang Ying Bao ,  Fumitomo Hide

发明人： Keiichi Nito ,  Akio Yasuda ,  Nobue Kataoka ,  Hidehiko Takanashi ,  Eriko Matsui ,  Yang Ying Bao ,  Fumitomo Hide

IPC分类号： G02F1/13363 ,  G02F1/141 ,  G02F1/1335

CPC分类号： H04N9/3188 ,  G02F1/13363 ,  G02F1/1347 ,  G02F1/141 ,  G02F2001/133638 ,  G02F2202/40 ,  G02F2413/08 ,  G02F2413/10 ,  G02F2413/15

摘要： An optical device according to this invention includes a phase modulating optical unit comprising a plurality of optically transparent base members each of which includes an optically transparent electrode and an alignment film formed in this order, and an optically transparent birefringent medium, wherein the optically transparent base members are spaced from one another at predetermined intervals so that the electrode and the alignment film of a base member is confronted to the electrode and the alignment film of another base member, and at least one kind of liquid crystal selected from the group consisting of ferroelectric liquid crystal (FLC), antiferroelectric liquid crystal (AFLC) and smectic liquid crystal having an electro clinic effect (SmA) (or mixed liquid crystals thereof) is injected into gaps between the base members.

摘要翻译： 根据本发明的光学装置包括相位调制光学单元，该相位调制光学单元包括多个光学透明基底构件，每个光学透明基底构件包括光学透明电极和依次形成的取向膜，以及光学透明双折射介质，其中光学透明基底 构件以预定间隔彼此间隔开，使得基底构件的电极和取向膜面对另一个基底构件的电极和取向膜，以及选自由铁电体组成的组中的至少一种液晶 将液晶（FLC），反铁电液晶（AFLC）和具有电临床效应（SmA）的（或其混合液晶）的近晶液体注入基材之间的间隙中。

公开(公告)号：US5654784A

公开(公告)日：1997-08-05

申请号：US139908

申请日：1993-10-22

申请人： Akio Yasuda ,  Keiichi Nito ,  Eriko Matsui ,  Hidehiko Takanashi ,  Yang Ying Bao

发明人： Akio Yasuda ,  Keiichi Nito ,  Eriko Matsui ,  Hidehiko Takanashi ,  Yang Ying Bao

IPC分类号： G02F1/137 ,  G02F1/133 ,  G02F1/1333 ,  G02F1/1337 ,  G02F1/141 ,  G09G3/18 ,  G02F1/13

CPC分类号： G02F1/141 ,  G02F1/133711 ,  G02F1/133734 ,  G02F1/133707 ,  G02F2001/133796 ,  G02F2203/30

摘要： A liquid crystal device comprises a pair of substrates and a liquid crystal provided between the paired substrates wherein domains whose threshold voltages are different from one another are finely distributed throughout the liquid crystal. In particular, the respective substrates each has a transparent electrode and an alignment film formed thereon in this order and the substrates are assembled to establish a given space therebetween, and a ferroelectric liquid crystal being injected into the given space wherein domains are finely distributed as set out above, thereby providing a a liquid crystal display device. The fine distribution is such that when a transmittance through inverted domains is 25%, the number of domains (microdomains) having a size of larger than 2 .mu.m.phi. in a field of 1 mm.sup.2 is not smaller than 300, preferably not smaller than 600, and the width of the threshold voltage within the domains is not smaller than 2 volts within a transmittance range of from 10 to 90%. The liquid crystal device, particularly the display device, keeps a high contrast and can easily, reliably realize an analog gray-scale display at low costs.

摘要翻译： 液晶装置包括一对基板和设置在成对基板之间的液晶，其中阈值电压彼此不同的畴细分布在整个液晶中。 特别地，各基板各自具有依次形成在其上的透明电极和取向膜，并且基板被组装以在其间建立给定的间隔，并且将铁电液晶注入到给定的空间中，其中磁畴精细分布 从而提供一种液晶显示装置。 精细分布使得当通过反向域的透射率为25％时，在1mm 2的场中具有大于2μmφ的尺寸的畴（微区）的数量不小于300，优选不小于600 ，并且在10至90％的透射率范围内，畴内的阈值电压的宽度不小于2伏特。 液晶装置，特别是显示装置，保持高对比度，并且可以容易地，可靠地以低成本实现模拟灰度显示。

公开(公告)号：US6040884A

公开(公告)日：2000-03-21

申请号：US900933

申请日：1997-07-25

申请人： Akio Yasuda ,  Keiichi Nito ,  Eriko Matsui ,  Hidehiko Takanashi ,  Yang Ying Bao

发明人： Akio Yasuda ,  Keiichi Nito ,  Eriko Matsui ,  Hidehiko Takanashi ,  Yang Ying Bao

IPC分类号： G02F1/137 ,  G02F1/133 ,  G02F1/1333 ,  G02F1/1337 ,  G02F1/141 ,  G09G3/18 ,  G02F1/13

CPC分类号： G02F1/141 ,  G02F1/133711 ,  G02F1/133734 ,  G02F1/133707 ,  G02F2001/133796 ,  G02F2203/30

摘要： A liquid crystal device comprises a pair of substrates and a liquid crystal provided between the paired substrates wherein domains whose threshold voltages are different from one another are finely distributed throughout the liquid crystal. In particular, the respective substrates each has a transparent electrode and an alignment film formed thereon in this order and the substrates are assembled to establish a given space therebetween, and a ferroelectric liquid crystal being injected into the given space wherein domains are finely distributed as set out above, thereby providing a a liquid crystal display device. The fine distribution is such that when a transmittance through inverted domains is 25%, the number of domains (microdomains) having a size of larger than 2 .mu.m.phi. in a field of 1 mm.sup.2 is not smaller than 300, preferably not smaller than 600, and the width of the threshold voltage within the domains is not smaller than 2 volts within a transmittance range of from 10 to 90%. The liquid crystal device, particularly the display device, keeps a high contrast and can easily, reliably realize an analog gray-scale display at low costs.

摘要翻译： 液晶装置包括一对基板和设置在成对基板之间的液晶，其中阈值电压彼此不同的畴细分布在整个液晶中。 特别地，各基板各自具有依次形成在其上的透明电极和取向膜，并且基板被组装以在其间建立给定的间隔，并且铁电液晶被注入到给定的空间中，其中磁畴精细分布 从而提供一种液晶显示装置。 精细分布使得当通过反向域的透射率为25％时，在1mm 2的场中具有大于2μmφ的尺寸的畴（微区）的数量不小于300，优选不小于600 ，并且在10至90％的透射率范围内，畴内的阈值电压的宽度不小于2伏特。 液晶装置，特别是显示装置，保持高对比度，并且可以容易地，可靠地以低成本实现模拟灰度显示。

公开(公告)号：US06392624B1

公开(公告)日：2002-05-21

申请号：US08385702

申请日：1995-02-08

申请人： Ying Bao Yang ,  Keiichi Nito ,  Akio Yasuda

发明人： Ying Bao Yang ,  Keiichi Nito ,  Akio Yasuda

IPC分类号： G09G336

CPC分类号： G09G3/3637 ,  G09G2310/06 ,  G09G2310/061

摘要： Method of driving a liquid crystal display such as a ferroelectric liquid crystal display by multiplex addressing. The display has a pair of bases. A transparent electrode layer and an orientation film are formed in this order on each base. The two bases are placed opposite to each other with a certain gap between them. A ferroelectric liquid crystal material is inserted in the gap. Let Vthlow be the voltage applied when the transmittivity of the liquid crystal material begins to change. Let Vthhigh be the voltage applied when the transmittivity of the liquid crystal material substantially assumes its maximum value. First and second select pulses of opposite polarities are applied to the liquid crystal material. Let Vs1 be the voltage of the first select pulse. Let Vs2 be the voltage of the second select voltage. This method is characterized in that Vs1=±(Vthlow−&Dgr;V), where &Dgr;V>0, and that Vs2=∓(Vthhigh+&Dgr;V), where &Dgr;V>0.

摘要翻译： 通过多路寻址来驱动诸如铁电液晶显示器的液晶显示器的方法。 显示器有一对基座。 在每个基底上依次形成透明电极层和取向膜。 两个基座彼此相对设置，它们之间具有一定的间隙。 将铁电液晶材料插入间隙。 将Vthlow设为当液晶材料的透射率开始变化时施加的电压。 将Vthhigh设为当液晶材料的透射率基本上达到其最大值时施加的电压。 将相反极性的第一和第二选择脉冲施加到液晶材料。 令Vs1为第一选择脉冲的电压。 令Vs2为第二选择电压的电压。 该方法的特征在于Vs1 =±（Vthlow-DELTAV），其中DELTAV> 0，Vs2 =∓（Vthhigh + DELTAV），其中DELTAV> 0。

公开(公告)号：US5214523A

公开(公告)日：1993-05-25

申请号：US691786

申请日：1991-04-26

申请人： Keiichi Nito ,  Mayumi Miyashita ,  Eriko Matsui ,  Seiichi Arakawa

发明人： Keiichi Nito ,  Mayumi Miyashita ,  Eriko Matsui ,  Seiichi Arakawa

IPC分类号： G02F1/133 ,  G02F1/1337 ,  G02F1/141

CPC分类号： G02F1/141 ,  G02F1/1416

摘要： A liquid crystal display device having fast response characteristics and enabling analog gray-scale display is provided. The liquid crystal display device is formed of a liquid crystal material having the chiral smectic C phase. The projection component on the substrates of the axial direction of a cone delineated by a liquid crystal molecule, and the projection component on the substrates of the axial direction of the liquid crystal molecule itself, are adapted to be coincident with the processing direction for uniaxial orientation of the substrates, this state being monostabilized as the initial state. On application of an electrical field, the liquid crystal molecule is rotated along the cone and the apparent tilt angle as viewed on the substrate surface is continuously changed in accordance with the strength of the applied electrical field. The intensity of the transmitted light is increased continuously with increasing tilt angle to obtain the continuous gray-scale or analog gray-scale.

公开(公告)号：US5571450A

公开(公告)日：1996-11-05

申请号：US396906

申请日：1995-03-01

申请人： Akio Yasuda ,  Keiichi Nito

发明人： Akio Yasuda ,  Keiichi Nito

IPC分类号： C09K19/02 ,  C09K19/46 ,  G02F1/13 ,  C09K19/34 ,  C09K19/12 ,  C09K19/20 ,  C09K19/32

CPC分类号： C09K19/46 ,  C09K19/0225

摘要： A ferroelectric liquid crystal composition comprises ferroelectric liquid crystal molecules defined by the product between a liquid crystal molecule design parameter, .alpha., and an apparent cone angle, .theta., of the liquid crystal molecules, .alpha..theta., being such that 12.5.ltoreq..alpha..theta..ltoreq.16 wherein .alpha.=(an infrared peak intensity ratio of the alkyl chain portion of a liquid crystal molecule prior to and after switching through an electric field)/(an infrared peak intensity ratio of the core portion of the liquid crystal molecules prior to and after switching through an electric field) and .theta. is an apparent cone angle (.degree.) observed from the direction to the substrate normal and the cone has an imaginary circular cone surface when liquid crystal molecules are rotated along the imaginary circular cone surface at the time of switching through an electric field. The composition ensures high speed response and high contrast.

摘要翻译： 铁电液晶组合物包含由液晶分子设计参数α和液晶分子αθ的明视锥角θ之间的乘积限定的铁电液晶分子，使得θ= 其中α=（在通过电场切换之前和之后的液晶分子的烷基链部分的红外峰强度比）/（以前的液晶分子的核心部分的红外峰强度比 在通过电场切换和切换之后），θ是从衬底法线方向观察到的明显锥角（DEG），并且当液晶分子沿着假想圆锥表面旋转时，锥体具有假想圆锥表面 通过电场切换的时间。 该组合物确保高速响应和高对比度。

公开(公告)号：US06335775B1

公开(公告)日：2002-01-01

申请号：US08721100

申请日：1996-09-26

申请人： Takashi Iwamura ,  Nobuhiro Kihara ,  Takeshi Yamasaki ,  Katsuya Shirai ,  Keiichi Nito ,  Masanobu Yamamoto ,  Akio Yasuda

发明人： Takashi Iwamura ,  Nobuhiro Kihara ,  Takeshi Yamasaki ,  Katsuya Shirai ,  Keiichi Nito ,  Masanobu Yamamoto ,  Akio Yasuda

IPC分类号： G02F11337

CPC分类号： G02F1/13378 ,  G02F1/141

摘要： In a liquid crystal device in which a pair of substrates each having an electrode and a liquid crystal orientation control layer are disposed opposite to each other leaving a predetermined gap therebetween and liquid crystal is disposed in the gap, a plurality of grooves are formed on each of the inner surface contacting the liquid crystal, the section of the inner surfaces in a direction along the grooves has such a shape that repetitive asymmetrical projections are formed and the radius of curvature of the grooves in a direction intersecting the grooves is set to 0.1 &mgr;m or more.

摘要翻译： 在具有电极和液晶取向控制层的一对基板彼此相对设置并在其间留有预定间隙并且液晶设置在间隙中的液晶装置中，在每个基板上形成多个凹槽 内表面沿着槽的方向的部分具有形成重复的不对称突起的形状，并且沟槽的与沟槽交叉的方向的曲率半径设定为0.1μm 或者更多。