公开(公告)号：US09239494B2

公开(公告)日：2016-01-19

申请号：US13292656

申请日：2011-11-09

申请人： Lachezar Komitov ,  Gurumurthy Hegde ,  Seung Hee Lee

发明人： Lachezar Komitov ,  Gurumurthy Hegde ,  Seung Hee Lee

IPC分类号： G02F1/13 ,  G02F1/1337 ,  G02F1/1334 ,  G02F1/1343 ,  G02F1/137

CPC分类号： G02F1/133753 ,  G02F2001/13345 ,  G02F2001/133761 ,  G02F2001/134372 ,  G02F2001/13775

摘要： A liquid crystal device comprising a first substrate; a second substrate; and a liquid crystal layer sandwiched between the first substrate and the second substrate, the liquid crystal layer comprising a nematic liquid crystal material and a polymer network. The polymer network is anchored to said first substrate and is configured to alternatingly induce splay deformation and bend deformation of the nematic liquid crystal material along a line parallel with the first substrate. Hereby, the relaxation time τfall of the liquid crystal device is reduced.

摘要翻译： 一种液晶装置，包括第一基板; 第二基板; 以及夹在所述第一基板和所述第二基板之间的液晶层，所述液晶层包括向列型液晶材料和聚合物网络。 聚合物网络被锚定到所述第一基底，并且被配置为沿着与第一基底平行的线交替地引起向列型液晶材料的喷射变形和弯曲变形。 因此，液晶装置的弛豫时间τfall降低。

公开(公告)号：US20110129622A1

公开(公告)日：2011-06-02

申请号：US13001144

申请日：2009-06-25

申请人： Lachezar Komitov ,  Giancarlo Galli ,  Emo Chiellini ,  Andrea Morelli

发明人： Lachezar Komitov ,  Giancarlo Galli ,  Emo Chiellini ,  Andrea Morelli

IPC分类号： C09K19/56 ,  C08G77/42 ,  B05D5/12

CPC分类号： G02F1/133711 ,  C08F290/068 ,  C08G77/20 ,  G02F1/133719 ,  G02F1/133723 ,  G02F2001/133742 ,  Y10T428/1014 ,  C08F220/24

摘要： A polymer for use in an alignment layer for a liquid crystal material is provided. The polymer comprises a polymer backbone comprising a plurality of repeating units, said repeating units being divided into at least two groups, wherein each repeating unit in a first group of said repeating units is functionalized with a pendant sidechain of a first type S1; each repeating unit in a second group of said repeating units is functionalized with a pendant sidechain of a second type S2; said first type of sidechain S1 comprising a fluorine substituted hydrocarbon group; and said second type of sidechain S2 comprising a siloxane. The polymer of the invention promotes homeotropic alignment of liquid crystal materials.

摘要翻译： 提供了一种用于液晶材料取向层的聚合物。 所述聚合物包括包含多个重复单元的聚合物主链，所述重复单元被分成至少两个基团，其中第一组所述重复单元中的每个重复单元用第一类型S1的侧链侧链官能化; 所述重复单元的第二组中的每个重复单元用第二类型S2的侧链侧链官能化; 所述第一类型的侧链S1包含氟取代的烃基; 并且所述第二类型的侧链S2包含硅氧烷。 本发明的聚合物促进液晶材料的垂直取向。

公开(公告)号：US07907236B2

公开(公告)日：2011-03-15

申请号：US11892399

申请日：2007-08-22

申请人： Lachezar Komitov ,  Nils Olsson ,  Bertil Helgee

发明人： Lachezar Komitov ,  Nils Olsson ,  Bertil Helgee

IPC分类号： G02F1/1335

CPC分类号： G02F1/1416 ,  C09K19/0266 ,  C09K19/406 ,  G02F1/1337 ,  G02F2001/1412

摘要： An electro-optic device including a liquid crystal material is disclosed, comprising antiferroelectric liquid crystals with large molecular tilt θ of about 45° degrees, disposed between two flat glass or polymer substrates. The liquid crystal molecules are preferably oriented parallel to the substrates (so-called HAF texture). The device is e.g. placed between two crossed polarizers so that in field-off conditions the impinging light is not passing through the device due to the isotropic optical properties of the antiferreoelectric liquid crystal aligned in HAF texture. An applied electric field induces a continuous transition of the optically isotropic antiferreoelectric (AF) state to ferroelectric (F) one which is birefringent enabling the transmission of light. The field-induced continuous switching between the optically isotropic antiferreoelectric state and the birefringent ferroelectric state enables the generation and fast switching of high contrast as well as generation of grey scale levels.

摘要翻译： 公开了一种包括液晶材料的电光装置，包括具有大分子倾斜角度的反铁电液晶; 约45度，设置在两个平板玻璃或聚合物基板之间。 液晶分子优选平行于基底定向（所谓的HAF纹理）。 该装置是例如 放置在两个交叉的偏振器之间，使得在场离开条件下，由于以HAF纹理排列的反铁电液晶的各向同性光学特性，入射光不会通过该装置。 施加的电场引起光学各向同性的反铁电（AF）状态与能够传输光的双折射的铁电（F）的连续转变。 光学各向同性的反铁电状态和双折射铁电状态之间的场致连续切换能够实现高对比度的产生和快速切换以及灰度级的产生。

公开(公告)号：US20080049175A1

公开(公告)日：2008-02-28

申请号：US11892399

申请日：2007-08-22

申请人： Lachezar Komitov ,  Nils Olsson ,  Bertil Helgee

发明人： Lachezar Komitov ,  Nils Olsson ,  Bertil Helgee

IPC分类号： G02F1/1335 ,  G02F1/1337

CPC分类号： G02F1/1416 ,  C09K19/0266 ,  C09K19/406 ,  G02F1/1337 ,  G02F2001/1412

摘要： An electro-optic device including a liquid crystal material is disclosed, comprising antiferroelectric liquid crystals with large molecular tilt θ of about 45° degrees, disposed between two flat glass or polymer substrates. The liquid crystal molecules are preferably oriented parallel to the substrates (so-called HAF texture). The device is e.g. placed between two crossed polarizers so that in field-off conditions the impinging light is not passing through the device due to the isotropic optical properties of the antiferreoelectric liquid crystal aligned in HAF texture. An applied electric field induces a continuous transition of the optically isotropic antiferreoelectric (AF) state to ferroelectric (F) one which is birefringent enabling the transmission of light. The field-induced continuous switching between the optically isotropic antiferreoelectric state and the birefringent ferroelectric state enables the generation and fast switching of high contrast as well as generation of grey scale levels.

摘要翻译： 公开了一种包括液晶材料的电光装置，其包括设置在两个平板玻璃或聚合物基板之间的具有约45°角的大分子倾斜度的反铁电液晶。 液晶分子优选平行于基底定向（所谓的HAF纹理）。 该装置是例如 放置在两个交叉的偏振器之间，使得在场离开条件下，由于以HAF纹理排列的反铁电液晶的各向同性光学特性，入射光不会通过该装置。 施加的电场引起光学各向同性的反铁电（AF）状态与能够传输光的双折射的铁电（F）的连续转变。 在光学各向同性的反铁电状态和双折射铁电状态之间的场致连续切换能够实现高对比度的产生和快速切换以及灰度级的产生。

公开(公告)号：US07916255B2

公开(公告)日：2011-03-29

申请号：US11665542

申请日：2005-10-18

申请人： Lachezar Komitov ,  Andriy Kozachenko

发明人： Lachezar Komitov ,  Andriy Kozachenko

IPC分类号： G02F1/1337 ,  H01L21/00 ,  G02F1/1333 ,  G02F1/1343

CPC分类号： G02F1/13718 ,  G02F1/133345 ,  G02F1/134327 ,  Y10T428/1036

摘要： A liquid crystal device is provided, having one or several display segments, a first display substrate, a second display substrate, a layer of liquid crystal material disposed between the first and second substrate; and layer of conductive material disposed on the substrates. The conductive layers form electrodes for applying an electric field across the liquid crystal for switching the liquid crystal material between a first optical state and a second optical state different from the first optical state. Image features of the display are further defined by the inclusion of a layer of patterned non-conductive or passive dielectric material on at least one of the substrates, the patterned material forming a mask defining image elements of the display segments.

摘要翻译： 提供具有一个或多个显示段的液晶装置，第一显示基板，第二显示基板，设置在第一和第二基板之间的液晶材料层; 和设置在基板上的导电材料层。 导电层形成用于在液晶上施加电场的电极，用于在不同于第一光学状态的第一光学状态和第二光学状态之间切换液晶材料。 显示器的图像特征还通过在至少一个基底上包括图案化的非导电或无源介电材料层来形成，图案化材料形成限定显示段的图像元素的掩模。

公开(公告)号：US07499125B2

公开(公告)日：2009-03-03

申请号：US11365412

申请日：2006-03-01

申请人： Lachezar Komitov ,  Liang-Chy Chien ,  Sang Hwa Kim

发明人： Lachezar Komitov ,  Liang-Chy Chien ,  Sang Hwa Kim

IPC分类号： G02F1/1333 ,  G02F1/13 ,  C09K19/52

CPC分类号： G02F1/13718 ,  G02F1/133711 ,  G02F2001/13775

摘要： In a preparation method, a chiral or cholesteric liquid crystal, a photoreactive monomer, and a photoinitiator are disposed in a liquid crystal cell. A principal surface of the liquid crystal cell is illuminated with ultraviolet light selected to have a non-uniform ultraviolet light intensity profile in the liquid crystal cell. The illuminating cooperates with the photoinitiator to polymerize at least a portion of the photoreactive monomer near the principal surface to generate a polymer network having a density corresponding to the non-uniform ultraviolet light intensity profile. The polymer network biases the liquid crystal toward a selected helical alignment direction. In some embodiments, the illuminating includes illuminating with first and second ultraviolet light intensity profiles to produce surface and volume polymer network components.

摘要翻译： 在制备方法中，在液晶单元中设置手性或胆甾型液晶，光反应性单体和光引发剂。 液晶单元的主表面被选择为在液晶单元中具有不均匀的紫外光强度分布的紫外光照射。 照明与光引发剂配合使得在主表面附近的至少一部分光反应性单体聚合以产生具有对应于非均匀紫外光强度分布的密度的聚合物网络。 聚合物网络朝向所选择的螺旋排列方向偏压液晶。 在一些实施例中，照明包括利用第一和第二紫外光强度分布的照射，以产生表面和体积的聚合物网络组件。

公开(公告)号：US20080204612A1

公开(公告)日：2008-08-28

申请号：US11711032

申请日：2007-02-27

申请人： Lachezar Komitov

发明人： Lachezar Komitov

IPC分类号： G02F1/133

CPC分类号： G02F1/133707 ,  G02F1/133377 ,  G02F1/134363 ,  G02F1/141

摘要： The present invention relates to a liquid crystal device driven by a linear coupling, such as ferroelectric and/or flexoelectric coupling, between an inhomogenous in-plane electric field generated by an electrode pattern over a first sub-volume of the bulk layer adjacent to said electrode pattern and liquid crystals in a polarized state comprised in said first sub-volume and/or in an optional alignment layer applied on said electrode pattern said polarization being stronger than any possible similar liquid crystal polarization of the bulk layer outside said first sub-volume, said alignment layer, and/or a second sub-volume of the bulk layer adjacent the inner surface of the other substrate, or an optional second alignment layer or an optional electrode pattern applied thereon.

摘要翻译： 本发明涉及一种由诸如铁电和/或柔性电耦合之类的线性耦合驱动的液晶装置之间，所述液晶装置在与所述第一子体相邻的本体层的第一子体积上的电极图案产生的不均匀面内电场之间 电极图案和包含在所述第一子体积中的极化状态的液晶和/或施加在所述电极图案上的任选取向层中的所述极化比所述第一子体积外的体层的任何可能的类似液晶极化强 ，所述取向层，和/或所述本体层的邻近所述另一个衬底的内表面的第二子体积，或任选的第二取向层或其上施加的任选的电极图案。

公开(公告)号：US20070088125A1

公开(公告)日：2007-04-19

申请号：US10562118

申请日：2004-03-04

申请人： Lachezar Komitov ,  Bertil Helgee

发明人： Lachezar Komitov ,  Bertil Helgee

IPC分类号： C08G63/91 ,  C08F216/06 ,  C08F16/06 ,  C08G63/48 ,  C08F116/06

CPC分类号： G02F1/133711 ,  C09K19/02 ,  C09K19/56 ,  G02F1/134363 ,  G02F1/1393 ,  G02F2001/133738 ,  G02F2001/133742 ,  G02F2001/133769 ,  Y10T428/10 ,  Y10T428/1005 ,  Y10T428/1036

摘要： The invention relates to a polymer for use as a surface-director alignment layer in a liquid crystal device, the polymer comprising a polymeric backbone and side-chains attached thereto, wherein the polymeric backbone lacks directly coupled ring structures, and each side-chain of at least some of the side-chains comprises at least two unsubstituted and/or substituted phenyls coupled via a coupling selected from the group consisting of a carbon-carbon single bond (—), a carbon-carbon double bond containing unit (—CH═CH—), a carbon-carbon triple bond containing unit (—C≡C—), a methylene ether unit (—CH2O—), an ethylene ether unit (—CH2CH2O—), an ester unit (—COO—) and an azo unit (—N═N—), exhibits a permanent and/or induced dipole moment that in ordered phase provides dielectric anisotropy, and is attached to the polymeric backbone via at least two spacing atoms.

摘要翻译： 本发明涉及一种在液晶装置中用作表面 - 导向器取向层的聚合物，该聚合物包含聚合物主链和与其连接的侧链，其中聚合物主链缺少直接结合的环结构，并且每个侧链 至少一些侧链包含至少两个未取代和/或取代的苯基，其通过选自碳 - 碳单键（ - ），含碳 - 碳双键单元（-CH- CH-），含碳 - 碳三键的单元（-C≡C-），亚甲基醚单元（-CH 2 O - ），乙烯醚单元（-CH 2） 酯单元（-COO-）和偶氮单元（-NN-）表现出永久的和/或诱导的偶极矩，其在有序相中提供电介质 并且通过至少两个间隔原子连接到聚合物主链上。

公开(公告)号：US6130731A

公开(公告)日：2000-10-10

申请号：US857860

申请日：1997-05-16

申请人： Gunnar Andersson ,  Ingolf Dahl ,  Lachezar Komitov ,  Sven Torbjorn Lagerwall ,  Kent Skarp ,  Bengt Stebler

发明人： Gunnar Andersson ,  Ingolf Dahl ,  Lachezar Komitov ,  Sven Torbjorn Lagerwall ,  Kent Skarp ,  Bengt Stebler

IPC分类号： G02F1/1333 ,  G02F1/1335 ,  G02F1/13363 ,  G02F1/1347 ,  G02F1/135 ,  G02F1/139 ,  G02F1/141 ,  G02F1/31

CPC分类号： G02F1/13471 ,  G02F1/141 ,  G02F1/1418 ,  G02F1/133365 ,  G02F1/133553 ,  G02F1/13473 ,  G02F1/135 ,  G02F1/31 ,  G02F2001/133531 ,  G02F2001/133638 ,  G02F2203/02

摘要： A device for influencing light has a polarizer, a ferroelectric or electroclinic response type liquid crystal halfwave plate whose liquid crystals are in the smectic phase with bookshelf geometry and have molecular axes which are rotatable around a first direction corresponding to the direction of incoming light in response to an electric field applied across the electrodes on either side of the halfwave plate, a quarter wave retarder plate, and a mirror. The polarizer, plates and mirror are arranged such that incoming light is passed from the polarizer through the liquid crystal plate and the retarder plate, and is reflected by the mirror in a second direction opposite to the first direction back through the retarder and the liquid crystal plate so as to provide a reflected polarized light plane to the polarizer. The polarizer has a first polarization direction set parallel to one electrically selectable molecular axis direction of the liquid crystal molecules, which is selected in response to a first electric field level. The retarder plate has its slow axis inclined either 45.degree. or 135.degree. relative to the optic axis of the liquid crystal. The liquid crystal, furthermore, is of a material which produces an angular difference 2.theta. in optic axis direction in response to a second electric field level whose polarity is opposite that of the first electric field level. This allows the device to rotate the reflected polarized light plane by an angle of 8.theta. in response to the second electric field level.

摘要翻译： 用于影响光的装置具有偏振器，铁电或电位响应型液晶半波片，其液晶处于具有书架几何形状的近晶相中，并且具有能够响应于与入射光方向对应的第一方向旋转的分子轴 涉及施加在半波片两侧的电极上的电场，四分之一波长延迟板和反射镜。 偏振器，平板镜和反射镜被布置成使得入射光从偏振器通过液晶板和延迟板，并且通过反射镜沿与第一方向相反的第二方向反射通过延迟器和液晶 以便向偏振器提供反射的偏振光平面。 偏振器具有平行于液晶分子的一个电选择分子轴方向设置的第一偏振方向，其响应于第一电场电平被选择。 缓速板的慢轴相对于液晶的光轴倾斜45°或135°。 此外，液晶是响应于极性与第一电场电平相反的第二电场电平而在光轴方向上产生角度差2θ的材料。 这允许装置响应于第二电场电平使反射的偏振光平面旋转角度为θθ。

公开(公告)号：US07575788B2

公开(公告)日：2009-08-18

申请号：US10562118

申请日：2004-03-04

申请人： Lachezar Komitov ,  Bertil Helgee

发明人： Lachezar Komitov ,  Bertil Helgee

IPC分类号： C09K19/00 ,  C09K19/52 ,  C09K19/06

CPC分类号： G02F1/133711 ,  C09K19/02 ,  C09K19/56 ,  G02F1/134363 ,  G02F1/1393 ,  G02F2001/133738 ,  G02F2001/133742 ,  G02F2001/133769 ,  Y10T428/10 ,  Y10T428/1005 ,  Y10T428/1036

摘要： The invention relates to a polymer for use as a surface-director alignment layer in a liquid crystal device, the polymer comprising a polymeric backbone and side-chains attached thereto, wherein the polymeric backbone lacks directly coupled ring structures, and each side-chain of at least some of the side-chains comprises at least two unsubstituted and/or substituted phenyls coupled via a coupling selected from the group consisting of a carbon-carbon single bond (—), a carbon-carbon double bond containing unit (—CH═CH—), a carbon-carbon triple bond containing unit (—C≡C—), a methylene ether unit (—CH2O—), an ethylene ether unit (—CH2CH2O—), an ester unit (—COO—) and an azo unit (—N═N—), exhibits a permanent and/or induced dipole moment that in ordered phase provides dielectric anisotropy, and is attached to the polymeric backbone via at least two spacing atoms.

摘要翻译： 本发明涉及一种在液晶装置中用作表面 - 导向器取向层的聚合物，该聚合物包含聚合物主链和与其连接的侧链，其中聚合物主链缺少直接结合的环结构，并且每个侧链 至少一些侧链包含至少两个未取代和/或取代的苯基，其通过选自碳 - 碳单键（ - ），含碳 - 碳双键单元（-CH- CH-），含碳 - 碳三键单元（-C≡C-），亚甲基醚单元（-CH2O-），乙烯醚单元（-CH2CH2O-），酯单元（-COO-）和 偶氮单元（-NN-）表现出永久和/或诱导的偶极矩，其在有序相中提供介电各向异性，并通过至少两个间隔原子连接到聚合物主链上。