Phenyl Benzoate Derivative Patents (Class 252/299.67)
  • Liquid-crystalline medium
    Patent number: 6902777
    Abstract: A liquid-crystalline mediums which contain one or more compounds of the formula A and at least one compound of the formula B wherein compounds of formula A contain at least one ring selected from and in which Ra, Rb, ring A and ring B, Y, Z1, Z2, a, L1, L2, L3, L4, L5, L6, L7, L8 and L9 are as defined herein, are suitable for use in twisted nematic (TN) and supertwisted nematic (STN) liquid-crystal displays. Such displays have very short response times and good steepnesses and angle dependencies.
    Type: Grant
    Filed: December 22, 2003
    Date of Patent: June 7, 2005
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Eike Poetsch, Peer Kirsch, Sabine Schoen
  • Energy-saving liquid-crystal mixtures
    Patent number: 6902776
    Abstract: The invention relates to energy-saving liquid-crystalline media, in particular in twisted nematic (TN) and supertwisted nematic (STN) liquid-crystal displays, having very short response times and good steepnesses and angle dependences, and to electro-optical display devices containing these media and to the use of these media in electro-optical display devices, where the media comprise: a component (?) which comprises at least one compound of the formula I and a component (?) which comprises at least one compound of the formula II where the following applies for the dielectric anisotropy ??corr of the liquid-crystalline medium: ? ? ? ? ? corr ? 5 · V 10 + 32 V 10 2 .
    Type: Grant
    Filed: October 3, 2003
    Date of Patent: June 7, 2005
    Assignee: Merck Patent GmbH
    Inventor: Michael Junge
  • Liquid-crystalline composition for printing inks, coatings and counterfeit-proof marking of articles
    Patent number: 6899824
    Abstract: A process for printing or coating a substrate with a liquid-crystalline composition and at least one non-liquid-crystalline print or coating as a multilayer and a substrate produced by this process is described. The liquid-crystalline composition contains at least one compound having two polymerizable groups and at least one compound having only one polymerizable group, and optional further additives. The non-liquid-crystalline print or coating contains one or more IR- or UV-absorbent or fluorescent dye or pigment. The process and the printed substrate are useful in producing counterfeiting-proof marking of articles.
    Type: Grant
    Filed: December 24, 2003
    Date of Patent: May 31, 2005
    Assignee: BASF Aktiengesellschaft
    Inventors: Frank Meyer, Hiroki Ishida, Peter Schuhmacher, Horst Neumann
  • Liquid-crystal medium, and electro-optical display containing same
    Patent number: 6896939
    Abstract: A nematic liquid-crystal media which comprises a) a dielectrically negative liquid-crystalline component A comprising one or more compounds of the formula I ?in which the parameters are as defined in the text, and b) a further dielectrically negative liquid-crystalline component B, and optionally c) a dielectrically neutral liquid-crystalline component C, and optionally d) a dielectrically positive liquid-crystalline component D, wherein said media is used in liquid-crystal displays.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: May 24, 2005
    Assignee: Merck Patent GmbH
    Inventors: Melanie Klasen-Memmer, Matthias Bremer, Malgorzata Rillich
  • Nematic liquid-crystal composition
    Patent number: 6890606
    Abstract: The invention relates to nematic liquid-crystal compositions comprising bisalkenyl compounds of the formula I and to their use in plasma-addressed LCDs.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: May 10, 2005
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Sven Schupfer, Marcus Reuter
  • Liquid-crystalline medium
    Patent number: 6890607
    Abstract: A liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, which contains one or more compounds of the formula I in which R1 is a halogenated or unsubstituted alkyl or alkoxy radical having from 1 to 15 carbon atoms, where one or more CH2 groups in these radicals are optionally, independently of one another, replaced by —C?C—, —CH?CH—, —O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another, X is SF5, and L1 and L2 are each, independently of one another, H or F. The media are useful in electro-optical liquid crystal displays.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: May 10, 2005
    Assignee: Merck Patent GmbH
    Inventors: Michael Heckmeier, Brigitte Schuler, Izumi Saito, Volker Reiffenrath, Georg Luessem, Christian Hock
  • Liquid crystal composition and liquid crystal display element
    Patent number: 6887532
    Abstract: A liquid crystal composition including three components, optionally four components, selected from the compounds (1-1) to (3-3) is provided. The composition has plural characteristics, i.e., a wide temperature range of a nematic phase, a low viscosity, a suitable optical anisotropy, and a large dielectric anisotropy, in a properly balanced manner. The invention further provides a liquid crystal display element including the composition.
    Type: Grant
    Filed: December 2, 2003
    Date of Patent: May 3, 2005
    Assignees: Chisso Corporation, Chisso Petrochemical Corporation
    Inventors: Eiji Okabe, Yoshitaka Tomi
  • Liquid crystal composition and liquid crystal display element
    Patent number: 6875482
    Abstract: The present invention provides a liquid crystal composition comprising at least one compound selected from the compounds represented by each of formulas (1) to (5) as set forth in the specification. The invention further provides a liquid crystal display element comprising the composition.
    Type: Grant
    Filed: December 4, 2003
    Date of Patent: April 5, 2005
    Assignees: Chisso Petrochemical Corporation, Chisso Corporation
    Inventors: Eiji Okabe, Yoshitaka Tomi
  • Light emitting polymer
    Patent number: 6867243
    Abstract: There is provided a process for forming a light emitting polymer comprising photopolymerization of a reactive mesogen having an endgroup which is susceptible to photopolymerization e.g. by a radical polymerization process. Also provided are methods for using the light emitter in displays, backlights, electronic apparatus and security viewers.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: March 15, 2005
    Assignee: University of Hull
    Inventors: Mary O'Neill, Stephen Malcolm Kelly, Adam Edward Alexander Contoret, Gary James Richards
  • Liquid-crystalline medium and liquid-crystal display having high twist
    Patent number: 6858268
    Abstract: The present invention relates to a liquid-crystalline medium having high twist, to the use thereof for electro-optical purposes, and to displays containing this medium.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: February 22, 2005
    Assignee: Merck Patent GmbH
    Inventors: Juliane Suermann, Meike Krumwiede
  • Photoisomerizable compounds
    Patent number: 6849203
    Abstract: The invention relates to photoisomerizable compounds of formula I wherein A, Z, L, R, R1, k, m and r are defined herein.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: February 1, 2005
    Assignee: Merck Patent Gesellschaft Mit Beschraenkter Haftung
    Inventors: Louise Diane Farrand, Christopher Worrall, Owain Llyr Parri
  • Liquid crystal compounds having bis(trifluoromethyl) phenyl rings, liquid crystal compositions and liquid crystal display devices
    Patent number: 6844032
    Abstract: The compound (1) having 2,3-bis(trifluoromethyl)-1,4-phenylene is stable chemically and has excellent miscibility with other liquid crystal compounds, large and negative dielectric anisotropy and proper optical anisotropy. A liquid crystal composition comprising the compound has large specific resistance and a large voltage holding ratio, and that the composition is useful for a liquid crystal display element.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: January 18, 2005
    Assignees: Chisso Corporation, Chisso Petrochemical Corporation
    Inventors: Kazutoshi Miyazawa, Takashi Kato, Yasuhiro Kubo, Kanetsugu Terashima
  • High polarization dopants for ferroelectric liquid crystal compositions
    Patent number: 6838128
    Abstract: The invention relates to chiral nonracemic liquid crystal compounds which are useful as components in liquid crystal compositions to impart high polarization to the mixture. The materials of this invention can be combined with liquid crystal host materials to impart improved properties to mixtures. Chiral nonracemic compounds of this invention can function as additives or dopants in host materials to impart chirality into an LC material.
    Type: Grant
    Filed: February 5, 2002
    Date of Patent: January 4, 2005
    Assignee: Displaytech, Inc.
    Inventors: Michael Wand, Xin Hua Chen
  • Method for forming mixed liquid crystal binary mixture with V-shaped switching
    Publication number: 20040262573
    Abstract: The present invention provides a mixed liquid crystal binary mixture with V-shaped switching electro-optical response characteristic, which is produced by achiral swallow-tailed material doped with the antiferroelectric liquid crystal material or with the ferroelectric liquid crystal material. The achiral swallow-tailed compound as the main material that is doped with the antiferroelectric liquid crystal material or with the ferroelectric liquid crystal material to produce the binary mixture, wherein the mixed liquid crystal binary mixture exhibits the electro-optical response of V-shaped switching in the antiferroelectric phase or in the ferroelectric phase.
    Type: Application
    Filed: June 25, 2003
    Publication date: December 30, 2004
    Inventors: Shune-Long Wu, Wen-Jiunn Hsieh
  • Liquid-crystalline medium
    Publication number: 20040262572
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it comprises one or more compounds of the formula I 1
    Type: Application
    Filed: July 8, 2004
    Publication date: December 30, 2004
    Inventors: Michael Heckmeier, Brigitte Schuler, Izumi Saito, Volker Reiffenrath, Georg Luessem, Christian Hock
  • Liquid-crystalline medium
    Publication number: 20040256600
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it comprises one or more compounds of the formula I 1
    Type: Application
    Filed: July 8, 2004
    Publication date: December 23, 2004
    Inventors: Michael Heckmeier, Brigitte Schuler, Izumi Saito, Volker Reiffenrath, Georg Luessem, Christian Hock
  • Thermotorpic liquid-crystal polymer
    Publication number: 20040256599
    Abstract: A thermotropic liquid crystalline polymer, which is obtainable by copolymerizing a trifunctional hydroxynaphthalene carboxylic acid represented by the general formula (I) and/or reactive derivative thereof with other polymerizing monomer(s) 1
    Type: Application
    Filed: December 15, 2003
    Publication date: December 23, 2004
    Inventors: Ryuzo Ueno, Masaya Kitayama, Kiichi Kometani, Hiroyuki Kato, Motoki Asahara
  • Liquid-crystalline medium
    Publication number: 20040251447
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I 1
    Type: Application
    Filed: July 2, 2004
    Publication date: December 16, 2004
    Inventors: Michael Heckmeier, Brigitte Schuler, Kazuaki Tarumi, Peer Kirsch, Volker Reiffenrath
  • Liquid-crystalline medium
    Publication number: 20040245501
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I 1
    Type: Application
    Filed: July 2, 2004
    Publication date: December 9, 2004
    Inventors: Michael Heckmeier, Brigitte Schuler, Kazuaki Tarumi, Peer Kirsch, Volker Reiffenrath
  • Liquid-crystalline medium
    Publication number: 20040245502
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it comprises one or more compounds of the formula I 1
    Type: Application
    Filed: July 8, 2004
    Publication date: December 9, 2004
    Inventors: Michael Heckmeier, Brigitte Schuler, Izumi Saito, Volker Reiffenrath, Georg Luessem, Christian Hock
  • Liquid-crystalline medium
    Patent number: 6827990
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it comprises one or more compounds of the formula I in which R1, L1 and L2 are as defined in claim 1.
    Type: Grant
    Filed: May 27, 2003
    Date of Patent: December 7, 2004
    Assignee: Merck Patent GmbH
    Inventors: Michael Heckmeier, Brigitte Schuler, Izumi Saito, Volker Reiffenrath, Georg Luessem, Christian Hock
  • Fluorene derivatives and their polymers
    Patent number: 6824709
    Abstract: Provided are a fluorene derivative represented by Formula (1) and a polymer thereof: wherein at least one of A1, A2 and A3 is a group represented by Formula (2), and the others are 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, pyridine-2,5-diyl, pyridazine-3,6-diyl, pyrimidine-2,5-diyl or dioxane-2,5-diyl; m, n and p are independently 0 or 1; R1 is —CN, —CF3, —CF2H, —CFH2, —OCF3, —OCF2H, —N═C═O, —N═C═S, —F, —Cl, or alkyl in which one hydrogen may be replaced by (meth)acryloyloxy or vinyloxy and optional —CH2— may be replaced by —O—, —S—, —CF2—, —CH═CH—, —COO—, —OCO— or —CO—; R2 is hydrogen or methyl; Z1 to Z3 are independently a single bond, —O—, —COO—, —OCO—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —CH2CH2—, —(C
    Type: Grant
    Filed: December 12, 2002
    Date of Patent: November 30, 2004
    Assignees: Chisso Corporation, Chisso Petrochemical Corporation
    Inventor: Ryushi Shundo
  • Optically active compound and liquid crystal composition containing the compound
    Patent number: 6821581
    Abstract: An optically active compound of the general formula (1) useful as a chiral dopant and use thereof, wherein each of m and n is independently an integer of 4 to 8, A is —Ph—COO—Ph—, —Ph—Ph—COO—, —Cy—COO—Ph—, —Ph—OOC—Ph—COO—, —Ph—OOC—Cy—COO—, —Ph—OOC—Np—COO— or —Np—OOC— in which —Ph— is a 1,4-phenylene group, —Cy— is a trans-1,4-cyclohexylene group and —Np— is a 2,6-naphtylene group, and C* is an asymmetric carbon atom. Having a helical twisting power (HTP) of at least 9 and having a property that the helical pitch induced decreases with an increase in temperature, the optically active compound of the present invention has an excellent value as a chiral dopant for a nematic liquid crystal.
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: November 23, 2004
    Assignee: Mitsubishi Gas Chemical Co., Inc.
    Inventors: Yasumasa Norisue, Yasue Ogi, Masahiro Johno
  • Liquid-crystalline mixtures
    Patent number: 6821582
    Abstract: A liquid-crystalline mixture that contains one or more compounds of each of the formulae IA, IB and IC and to the use thereof in TN, STN and IPS displays.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: November 23, 2004
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Volker Reiffenrath, Marcus Reuter, Sabine Schoen, Sven Schüpfer, Clarissa Weller
  • Polymerizable compounds and their polymers
    Publication number: 20040222403
    Abstract: A compound represented by formula (1) or (2) and a polymer obtained by polymerizing the compound are provided: 1
    Type: Application
    Filed: January 5, 2004
    Publication date: November 11, 2004
    Inventors: Yasuyuki Sasada, Kazuhiko Saigusa
  • Liquid-crystalline medium
    Publication number: 20040222404
    Abstract: The invention relates to a liquid-crystalline medium which is characterised in that it comprises one or more compounds of the formula A 1
    Type: Application
    Filed: February 13, 2004
    Publication date: November 11, 2004
    Inventors: Harald Hirschmann, Peer Kirsch
  • Electrooptical liquid crystal display
    Patent number: 6815017
    Abstract: The invention relates to an electrooptical liquid crystal display comprising a reorientation layer for reorientation of the liquid crystals. The field of said reorientation layer has a component parallel to the liquid crystal layer, said component being crucial for the reorientation. Said component comprises a liquid-crystalline medium having a positive dielectric anisotropy and contains at least one mesogenic compound of the formula (I), wherein R1 and L are delined as in claim 1.
    Type: Grant
    Filed: February 4, 2003
    Date of Patent: November 9, 2004
    Assignee: Merck Patent GmbH
    Inventors: Michael Heckmeier, Eike Poetsch
  • Liquid-crystalline medium
    Patent number: 6808763
    Abstract: The invention relates to a liquid-crystalline medium which is characterized in that it comprises one or more compounds of the formula A and one more compounds of the formula B in which Ra, Rb, Rbb, x and L1 are as defined in claim 1.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: October 26, 2004
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Sven Schüpfer, Martina Weidner, Renate Graulich
  • Liquid-crystalline medium having a high birefringence and improved UV stability
    Patent number: 6808764
    Abstract: A liquid-crystalline medium comprises the compound of the formula (I): generally in amounts from 1 to 30% by weight, preferably from 2 to 20% by weight, particularly preferably from 3 to 10% by weight, and further liquid-crystalline compounds.
    Type: Grant
    Filed: February 5, 2003
    Date of Patent: October 26, 2004
    Assignee: Merck Patent GmbH
    Inventors: Michael Heckmeier, Volker Reiffenrath
  • Liquid crystal composition and liquid crystal display element
    Patent number: 6808765
    Abstract: A liquid crystal composition comprising; as a first component, at least one compound selected from a group of compounds represented by Formula (1); as a second component, at least one compound selected from a group of compounds represented by Formula (2); as a third component, at least one compound selected from a group of compounds represented by Formula (3); as a forth component, at least one compound selected from a group of compounds represented by Formula (4); and as a fifth component, at least one compound selected from a group of compounds represented by Formulas (5-1) and (5-2), in which each compound represented by the Formula (1) to (5-2) is defined in the specification.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: October 26, 2004
    Assignees: Chisso Corporation, Chisso Petrochemical Corporation
    Inventor: Masayuki Saito
  • Polymerizable liquid crystal compound and optical film
    Patent number: 6805920
    Abstract: This invention provides a polymerizable liquid crystal compound having a large value of &Dgr;n/n, excellent in coating properties on an alignment film and easily aligned. Disclosed is a polymerizable liquid crystal compound having at least one polymerizable reactive group and showing nematic liquid crystal properties, having a &Dgr;n/n value of 0.14 or more wherein n is average refractive index and &Dgr;n is extraordinary light refractive index (ne) minus ordinary light refractive index (no), and being aligned by application onto an alignment film.
    Type: Grant
    Filed: April 11, 2002
    Date of Patent: October 19, 2004
    Assignees: Nitto Denko Corporation, Takasago International Corporation
    Inventors: Shusaku Nakano, Amane Mochizuki, Yukiharu Iwaya, Shinya Yamada, Tsutomu Hashimoto, Yuji Nakayama, Yoshiki Hasegawa, Ken Suzuki, Tohru Kobayashi
  • Liquid-crystalline medium
    Patent number: 6805923
    Abstract: A liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I in which R, A, L1, L2 and Y are as defined herein are suitable for use in liquid crystal displays such as MLC, TN or STN displays.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: October 19, 2004
    Assignee: Merck Patentgesellschaft Mit
    Inventors: Michael Heckmeier, Brigitte Schuler, Peer Kirsch, Eike Poetsch
  • Optically active compound and nematic liquid crystal composition containing the compound
    Patent number: 6805921
    Abstract: An optically active compound of the following general formula (1), wherein A is —C≡C— or —COO—, each of R1 and R2 is independently CnH2n+1—, (C2H5)2CHCH2C*H(CH3)OOC—, CmH2m+1C*H(CH3)OOC— or C6H5C*H(CH3)OOC— in which n is an integer of 2 to 5, m is an integer of 5 to 9, C6H5— is phenyl group, and C* is an asymmetric carbon, provided that there is no case where R1 and R2 are together CnH2n+1— or C6H5C*H(CH3)OOC— and that when both R1 and R2 are CmH2m+1C*H(CH3)OOC—, m in CmH2m+1C*H(CH3)OOC— represented by R1 and m in CmH2m+1C*H(CH3)OOC— represented by R2 may be different integers. The optically active compound of the present invention is excellently valuable as a chiral dopant since it has properties that its helical twisting power (HTP) is at least 9, that a helical pitch induced decreases with an increase in temperature and further that its birefringence (&Dgr;n) is large.
    Type: Grant
    Filed: August 6, 2002
    Date of Patent: October 19, 2004
    Assignee: Mitsubishi Gas Chemical Co., Inc.
    Inventors: Yasumasa Norisue, Yuki Motoyama, Masahiro Johno
  • Liquid crystal polyester resin
    Patent number: 6802989
    Abstract: A liquid crystal polyester resin comprising 1 to 500 mmol % of a recurring unit derived from 4-hydroxyisophthalic acid and/or salicylic acid as a comonomer and 10 to 5,000 ppm in terms of an alkali metal of an alkali metal compound. This resin has excellent colorability, improved heat resistance and high mechanical properties.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: October 12, 2004
    Assignee: Kabushiki Kaisha Ueno Seiyaku Oyo Kenkyusho
    Inventors: Ryuzo Ueno, Masaya Kitayama, Kiichi Kometani, Hiroyuki Kato, Kazunori Ueda
  • Electro-optical liquid-crystal display
    Patent number: 6800338
    Abstract: To provide an electro-optical liquid-crystal displays with low addressing voltages and low to moderate multiplex ratios, in particular STN displays, organic alignment layers of low layer thickness are utilized.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: October 5, 2004
    Assignee: Merck Patentgesellschaft
    Inventors: Thomas Jacob, Juliane Suermann
  • OPTICALLY ACTIVE POLYESTER, PHOTOREACTIVE CHIRAL AGENT, LIQUID CRYSTAL COMPOSITION, LIQUID CRYSTAL COLOR FILTER, OPTICAL FILM, RECORDING MEDIUM, METHOD OF CHANGING THE HELICAL STRUCTURE OF A LIQUID CRYSTAL, AND METHOD OF FIXING THE HELICAL STRUCTURE OF A LIQUID CRYSTAL
    Patent number: 6800220
    Abstract: The present invention discloses an optically active polyester comprising at least constituent units represented by the general formula (I) and the general formula (II): wherein Ar1 and Ar2 each independently represents a bivalent aromatic group or a bivalent heteroaromatic group, and X1 and X2 each independently represents a hydrogen atom or an electron-withdrawing group, wherein A represents a bivalent substituent.
    Type: Grant
    Filed: May 14, 2002
    Date of Patent: October 5, 2004
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masatoshi Yumoto, Mitsuyoshi Ichihashi, Kouya Kawabata
  • Nematic liquid crystal mixtures for bistable display devices
    Publication number: 20040188654
    Abstract: Nematic liquid crystal mixtures with weak zenithal anchoring energy for bistable display devices, comprising at least 40% by weight of compounds with strong molecular polarisability and strong dipole moment.
    Type: Application
    Filed: February 25, 2004
    Publication date: September 30, 2004
    Inventors: Jean Claude Dubois, Didier Gallaire, Stephane Joly, Ivan N. Dozov, Philippe Martinot-Lagarde, Daniel N. Stoenescu
  • Liquid crystal polyester resin composition, process for producing the same, and molded article thereof
    Patent number: 6793847
    Abstract: Provided is a liquid crystal polyester resin composition, which comprises 5-20 parts by weight of glass fiber having a specific number average fiber diameter and fiber length after molding and 100 parts by weight of a specific liquid crystal polyester resin, and the flexural modulus thereof measured with using a test piece of 0.5 mm thickness is 25 GPa or more; and also provided a process for producing a molded article therefrom. The liquid crystal polyester resin composition is low in specific gravity, and is excellent in processability, mechanical properties, and heat resistance.
    Type: Grant
    Filed: April 3, 2001
    Date of Patent: September 21, 2004
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Mituo Maeda, Satoshi Nagano
  • Liquid crystalline medium and liquid crystal display
    Patent number: 6793985
    Abstract: Liquid crystalline media comprising a dielectrically positive component A, comprising compounds of formula I wherein the parameters have the meanings given herein, are suitable for use in liquid crystal displays, especially to active matrix displays and in particular IPS displays.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: September 21, 2004
    Assignee: Merck Patent GmbH
    Inventors: Shinji Nakajima, Yasushi Sugiyama, Yukiomi Tanaka, Takanori Takeda, Hideo Ichinose
  • Polymerizable liquid crystals
    Patent number: 6793986
    Abstract: Disclosed are polymerizable liquid-crystalline compounds of the general formula (I) where A1 and A2 are identical or different and are each a crosslinkable group; the radicals X are identical or different and are each a single bond, —O—, —S—, —C═N—, —O—CO—, —CO—O—, —O—CO—O—, —CO—NR—, —NR—CO—, —NR—, —O—CO—NR, —NR—CO—O—, —CH2—O— or —NR—CO—NR, in which R is H or C1-C4-alkyl; and M is a mesogenic group, a process for their preparation and their use for preparing cholesteric phases.
    Type: Grant
    Filed: October 6, 2003
    Date of Patent: September 21, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Frank Prechtl, Robert Parker, Peter Schuhmacher, Norbert Schneider, Sylke Haremza, Hans-Werner Schmidt, Gerold Schmitt
  • Liquid crystal medium
    Patent number: 6793983
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I and at least one compound of the formula in which the substituents are as defined in claim 1.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: September 21, 2004
    Assignee: Merck Patent GmbH
    Inventors: Michael Heckmeier, Brigitte Schuler, Kazuaki Tarumi, Peer Kirsch, Volker Reiffenrath
  • Fluid crystalline medium and high-torsion liquid crystalline display device
    Publication number: 20040173775
    Abstract: The invention relates to a high-torsion liquid crystalline medium, the use thereof for electro-optical purposes, and display devices containing said medium.
    Type: Application
    Filed: December 15, 2003
    Publication date: September 9, 2004
    Inventors: Juliane Suermann, Andreas Taugerbeck, Peer Kirsch, Detlef Pauluth
  • Liquid crystal composition and liquid crystal light modulating apparatus
    Patent number: 6787201
    Abstract: A chiral nematic liquid crystal composition that exhibits a cholesteric phase, said chiral nematic crystal composition comprising 55 wt % to 90 wt % of a nematic liquid crystal composition that comprises, as main components thereof, a liquid crystal ester compound and a liquid crystal pyrimidine compound, wherein said liquid crystal ester compound does not include a tolan skeleton therein and said liquid crystal pyrimidine compound includes a fluorine atom therein; and 10 wt % to 45 wt % of at least one chiral agent. A liquid crystal light modulating apparatus comprising a pair of substrates at least one of which is transparent; and the chiral nematic liquid crystal composition disposed between the substrates.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: September 7, 2004
    Assignee: Minolta Co., Ltd.
    Inventors: Akihito Hisamitsu, Takeshi Kitahora, Fumie Motoori, Hideaki Ueda
  • 1,4-Di-(trans-4-cyclohexyl)benzene derivatives and their use in liquid crystal media and liquid crystal devices
    Publication number: 20040164276
    Abstract: Liquid-crystalline media comprising one or more compounds of the formula I 1
    Type: Application
    Filed: February 13, 2004
    Publication date: August 26, 2004
    Inventors: Harald Hirschmann, Martina Weidner, Sven Schuepfer, Renate Graulich, Mark John Goulding, Martin Heeney, Warren Duffy
  • Printable liquid crystal material
    Publication number: 20040155221
    Abstract: The invention relates to the use of a printable polymerisable liquid crystal material as printable system for the preparation of polymers and pigments, to printable polymerisable liquid crystal materials and pigments and polymers prepared thereof, and to the use of the printable materials, pigments and polymers in optical, electrooptical, semiconductor and electronic applications and as birefringent and optically variable markings for decorative, security, authentification or identification applications.
    Type: Application
    Filed: November 3, 2003
    Publication date: August 12, 2004
    Inventors: Robert Hammond-Smith, John Patrick, Rodney Riddle
  • Utilization of polymerizable liquid crystal substances for the production of optical components
    Patent number: 6773766
    Abstract: The present invention relates to the use of polymerizable liquid-crystalline compounds for the production of optical elements having color- and polarization-selective reflection, and to optical elements comprising these compounds in monomeric or polymerized form.
    Type: Grant
    Filed: May 7, 2003
    Date of Patent: August 10, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Frank Meyer, Norbert Schneider, Peter Schuhmacher
  • Liquid crystal mixtures
    Publication number: 20040149956
    Abstract: The invention relates to TN and STN liquid-crystal displays and to the nematic liquid-crystal mixtures used therein, characterised in that they comprise one or more compounds of the formula I 1
    Type: Application
    Filed: November 24, 2003
    Publication date: August 5, 2004
    Inventors: Antje Mhlfeld, Michael Junge, Harald Hirschmann, Sabine Schoen, Juliane Suermann, Ursula Patwal, Dagmar Zimmermann
  • Selective ether cleavage synthesis of liquid crystals
    Publication number: 20040144954
    Abstract: Selective ether cleavage for making platform molecules and polymerizable mesogens.
    Type: Application
    Filed: December 24, 2003
    Publication date: July 29, 2004
    Applicant: Southwest Research Institute
    Inventors: Stephen T. Wellinghoff, Douglas P. Hanson
  • Liquid crystalline polymer composition
    Publication number: 20040140450
    Abstract: Liquid crystalline polymer having repeat units derived from 4,4′-biphenol, terephthalic acid, 2,6-naphthalenedicarboxylic acid, and 4-hydroxybenzoic acid in a limited compositional range have melting points of 400° C. or more, and are useful for molded articles and for films, particularly for uses where good high temperature resistance is needed.
    Type: Application
    Filed: December 2, 2003
    Publication date: July 22, 2004
    Inventors: Marion G. Waggoner, Michael Robert Samuels
  • Compound, retardation plate and method for forming optically anisotropic layer
    Publication number: 20040142116
    Abstract: A retardation plate having a high film strength and having an optical property is provided by using a biaxial liquid crystal compound, in which the direction having a minimum refractive index of the optically anisotropic thin layer almost coincides with the normal direction in the film plane of the retardation plate, and the retardation plate comprises a transparent support and at least one optically anisotropic layer containing a liquid crystal compound capable of expressing a biaxial liquid crystal phase, wherein the liquid crystal compound is a polymerizable compound and/or a polymer compound.
    Type: Application
    Filed: January 9, 2004
    Publication date: July 22, 2004
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Hideyuki Nishikawa, Atsuhiro Ohkawa