Benzene Rings Linked By Direct Bond Patents (Class 252/299.65)
  • Patent number: 10539848
    Abstract: An in-plane retardation switching device includes a first substrate, a second substrate, a non-chiral smectic C phase liquid crystal material disposed between the first substrate and the second substrate. The liquid crystal material is of a bulk state. The liquid crystal material has a phase transition sequence of a smectic C phase, a smectic A phase, a nematic phase and an isotropic phase in this order. The liquid crystal material does not have spontaneous polarization and is configured to be driven by quadra-pole momentum of the liquid crystal material.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: January 21, 2020
    Assignee: I-CORE TECHNOLOGY, LLC
    Inventor: Akihiro Mochizuki
  • Patent number: 9458381
    Abstract: This invention relates to liquid crystal compound of formula I containing benzene derivatives group that hydrogen substituted by deuterium. Liquid crystal compounds of formula I have not only large positive dielectric anisotropy, but also moderate optical anisotropy and driving voltage, thereby having great significance to formulate a liquid crystal mixture. A liquid crystal mixture containing such type of liquid crystal compounds can be applied in various display devices, which is particularly suitable for TN and STN display devices, and can also be used in IPS and VA display devices.
    Type: Grant
    Filed: July 3, 2014
    Date of Patent: October 4, 2016
    Assignee: SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO., LTD.
    Inventors: Ze Feng Hou, Wen Hai Lu, Xing Zhang, Guo Liang Yun, Rui Mao Hua, Ming Li, Lei Zhao
  • Publication number: 20150079380
    Abstract: To suppress a phenomenon where an optical axis of the optically anisotropic layer is tilted when the optically anisotropic layer is produced by using a liquid crystalline compound showing smectic phase as a materials showing a higher level of orderliness. An optically anisotropic layer wherein a polymerizable composition, containing one or more polymerizable rod-like liquid crystal compound showing a smectic phase, is fixed in a state of smectic phase, and a direction of maximum refractive index of the optically anisotropic layer is inclined at 10° or smaller to the surface of the optically anisotropic layer, a method for manufacturing the same, a laminate and a method for manufacturing the same, a polarizing plate, a liquid crystal display device, and an organic EL display device.
    Type: Application
    Filed: September 10, 2014
    Publication date: March 19, 2015
    Applicant: FUJIFILM CORPORATION
    Inventors: Ayako MURAMATSU, Shinnosuke SAKAI, Teruki NIORI, Shinichi MORISHIMA
  • Patent number: 8980383
    Abstract: A method of making a wide temperature-range smectic liquid crystal material comprises taking a wide temperature-range nematic mixture and doping this with a mesogenic silicon-containing material. Aspects of the invention provide wide temperature-range smectic materials and devices using the smectic materials.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: March 17, 2015
    Assignee: Cambridge Enterprise Limited
    Inventors: Harry J. Coles, Damian J. Gardiner
  • Publication number: 20150060734
    Abstract: A liquid crystal composition including a first liquid crystal monomer, and a second liquid crystal monomer, wherein the ratio of the first liquid crystal monomer is 5 wt % to 10 wt % and the ratio of the second liquid crystal monomer is 90 wt % to 95 wt %, based on the total weight of the first liquid crystal monomer and the second liquid crystal monomer. The first liquid crystal monomer is selected from the group consisting of tetra-cyclic compounds represented by formula 1 to formula 6: wherein R is C3-C12 alkyl group, X is —COO—, —C?C—, or —N?N—, and Y is —CN. The second liquid crystal monomer includes a bicyclic structure or a tricyclic structure.
    Type: Application
    Filed: October 22, 2013
    Publication date: March 5, 2015
    Applicant: Chunghwa Picture Tubes, LTD.
    Inventors: Chun-Wei Su, Jian-Hua Chen
  • Patent number: 8920674
    Abstract: To provide a liquid crystal composition satisfying at least one characteristic including a high maximum temperature of a nematic phase, a low minimum temperature thereof, a small viscosity, a large optical anisotropy, dielectric anisotropy and specific resistance, a high stability to ultraviolet light and heat, or a liquid crystal composition having a suitable balance regarding at least two characteristics; and an AM device having a short response time, a large voltage holding ratio and contrast ratio and a long life; a liquid crystal composition has a negative dielectric anisotropy and contains a compound having a low minimum temperature as a first component and a compound having a large negative dielectric anisotropy as a second component, and may contain a compound having a small viscosity as a third component and a compound having a large negative dielectric anisotropy as a fourth component, and a liquid crystal display device containing the composition.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: December 30, 2014
    Assignees: JNC Corporation, JNC Petrochemical Corporation
    Inventors: Takayoshi Yanai, Norikatsu Hattori, Hiroyuki Tanaka
  • Patent number: 8778223
    Abstract: Provided are compounds useful for use in liquid crystal mixtures to improve the properties of the mixture. In embodiments, the compound has two cyclohexyl ring and a tail containing one more fluorine atoms.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: July 15, 2014
    Assignee: LC Vision, LLC
    Inventor: Michael Wand
  • Patent number: 8685275
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy, which contains at least one compound of the formula I and at least one compound of the formula II in which R1, R2, R3, R4, ring A, Z1, Z2 and m are as defined in claim 1, and to the use thereof for an active-matrix display based on the ECB, VA, PS-VA, FFS, PALC or IPS effect.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: April 1, 2014
    Assignee: Merck Patent GmbH
    Inventors: Norihiko Tanaka, Makoto Murakami, Shinji Nakajima
  • Patent number: 8663497
    Abstract: Disclosed is a liquid crystal composition formed by including a polymerizable compound represented by general formula (I) in a nematic liquid crystal composition with negative dielectric anisotropy (??). In the formula, ring C1 represents a benzene-1,2,4-triyl group, or the like; rings C2 to C4 represent a 1,4-phenylene group, a naphthalene-2,6-diyl group, or the like; M1 to M3 represent a hydrogen atom or a methyl group; Z1 and Z2 are a direct coupling, -L1-, -L1O—, -L1O—CO—, or the like; Z6 is a direct coupling, -L2-, -OL2-, —O—COL2-, or the like; at least one of Z1, Z2, and Z6 is not a direct coupling; L1 and L2 represent a C1-10 alkylene group; Z3 to Z5 represent a direct coupling, an ester bond, or the like; and p, q, and r are 0 or 1, wherein 1?p+q+r?3.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: March 4, 2014
    Assignee: Adeka Corporation
    Inventors: Ken Matsumoto, Masatomi Irisawa
  • Patent number: 8603358
    Abstract: A liquid crystal composition containing a polymerizable compound according to the present invention is used in a liquid crystal display element to which a liquid crystal alignment capability is provided by polymerization. The composition contains a polymerizable compound that polymerizes without a photopolymerization initiator or with only an extremely small amount of photopolymerization initiator. Therefore, the alignment after the polymerization becomes more stable and the display characteristics do not degrade. Thus, the polymerizable compound is suitable as a practical component of the liquid crystal composition. A liquid crystal display element that uses the liquid crystal composition containing a polymerizable compound according to the present invention can be suitably used for VA and IPS liquid crystal display elements.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: December 10, 2013
    Assignee: DIC Corporation
    Inventors: Takeshi Kuriyama, Shinichi Hirata, Shotaro Kawakami
  • Publication number: 20130270481
    Abstract: A liquid crystalline polyester having structural units (I), (II), (III), (IV) and (V), wherein a ratio of the structural unit (I) to sum of the structural units (I), (II) and (III) is 68 to 80 mol %, a ratio of the structural unit (II) to sum of the structural units (II) and (III) is 55 to 75 mol %, and a ratio of the structural unit (IV) to sum of the structural units (IV) and (V) is 60 to 85 mol %, wherein a total amount of the structural units (II) and (III) is substantially equimolar with a total amount of the structural units (IV) and (V), and ?S (entropy of melting) defined by Equation [1] given below is 1.0 to 3.
    Type: Application
    Filed: December 14, 2011
    Publication date: October 17, 2013
    Applicant: Toray Industries, Inc.
    Inventors: Kohei Miyamoto, Mitsushige Hamaguchi, Hideyuki Umetsu
  • Patent number: 8545717
    Abstract: The present invention relates to a composition comprising a curable dichroic dye and a curable liquid crystal compound, which are used to prepare an optical component that is vertically oriented to give a narrow viewing angle, to form an optical component, and an optical component comprising an optical component layer prepared using the same. There is provided a composition for forming an optical component comprising 0.1-90 parts by weight of a dichroic dye and 10-98.85 parts by weight of a curable liquid crystal compound, and there is also provided an optical component comprising an optical component layer in which a curable liquid crystal compound and a curable dichroic dye are vertically oriented.
    Type: Grant
    Filed: July 4, 2008
    Date of Patent: October 1, 2013
    Assignee: LG Chem, Ltd.
    Inventors: Yong Il Cho, Dae Hee Lee, Sin Young Kim, Hee Jean Lee, Su Young Ryu
  • Patent number: 8512596
    Abstract: A composition, including a liquid crystal polymer or oligomer having a terminal hydroxyl group, and a cross-linking agent including a bismaleimide compound, an epoxy resin or a combination thereof, wherein the liquid crystal polymer or oligomer is represented by Formula 1: Z1—(R1)m—(R2)n—Z2??(1), wherein R1 is represented by Formula 2: —X1—Ar1—Y1—??(2), wherein X1 and Y1 are each independently selected from the group consisting of O, CO and NR?, in which R? is independently selected from the group consisting of a hydrogen atom, a substituted or unsubstituted C1-C20 alkyl group, and a substituted or unsubstituted C6-C30 aryl group, and Ar1 includes at least one divalent aromatic or alicyclic organic group selected from the group consisting of Formula 3:
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: August 20, 2013
    Assignees: Samsung Electronics Co., Ltd., Samsung Electro-Mechanics Co., Ltd., Samsung Fine Chemicals Co., Ltd.
    Inventors: Kwang Hee Kim, Myung Sup Jung, Chung Kun Cho, Jae Jun Lee, Kalinina Fedosya
  • Patent number: 8506842
    Abstract: Provided is a liquid crystal composition that satisfies at least one of characteristics such as high maximum temperature of a nematic phase, low minimum temperature of a nematic phase, small viscosity, large optical anisotropy, large dielectric anisotropy, large specific resistance, high stability to ultraviolet light and high stability to heat, or that is suitably balanced between at least two of the characteristics; and provided is an AM device. The liquid crystal composition having a nematic phase includes a three-ring compound having a specific difluoromethyleneoxy bond having large dielectric anisotropy as a first component, a specific three-ring compound having large dielectric anisotropy as a second component, a specific four-ring compound having high maximum temperature as a third component, and a specific two-ring compound having high maximum temperature and small viscosity as a fourth component, and the liquid crystal display device contains this composition.
    Type: Grant
    Filed: May 10, 2010
    Date of Patent: August 13, 2013
    Assignees: JNC Corporation, JNC Petrochemical Corporation
    Inventors: Takahiro Miyairi, Norikatsu Hattori
  • Patent number: 8470198
    Abstract: The invention relates to novel calamitic mesogenic compounds which are especially suitable for use in birefringent films with negative optical dispersion, to novel liquid crystal (LC) formulations and polymer films comprising them, and to the use of the compounds, formulations and films in optical, electrooptical, electronic, semiconducting or luminescent components or devices.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: June 25, 2013
    Assignee: Merck Patent GmbH
    Inventors: Kevin Adlem, Owain Llyr Parri
  • Patent number: 8465672
    Abstract: The invention relates to mesogenic tetrahydropyran compounds having at least four rings, of the formula I in which R1, A1, A2, X1, L1, L2, m and n have the meanings indicated in Claim 1, and to a process for the preparation thereof, to the use thereof in liquid-crystalline media, to liquid-crystalline media comprising at least one compound of the formula I, and to electro-optical displays containing a liquid-crystalline medium of this type.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: June 18, 2013
    Assignee: Merck Patent GmbH
    Inventors: Lars Lietzau, Markus Czanta, Atsutaka Manabe
  • Patent number: 8460577
    Abstract: The invention provides a compound represented by formula (1). In the formula (1), R1 is hydrogen, methyl or ethyl; X1 is a single bond, —O— or —OCO—; X2 is a single bond, —O—, —COO— or —OCO—; A1 and A2 are each independently a divalent aromatic ring or a divalent cyclohexane ring, and in these rings, arbitrary hydrogen may be replaced by halogen, alkyl having 1 to 3 carbons or halogenated alkyl having 1 to 3 carbons; Z1 is independently a single bond, —O—, —S—, —COO—, —OCO—, —CH2O—, —OCH2—, —CH?CH—COO—, —OCO—CH?CH—, —CH2CH2—COO—, —OCO—CH2CH2—, —CON(R)— or —N(R)CO—; R is hydrogen or methyl; Y is a terpenoid residue or a steroid residue; m is an integer from 0 to 20; and n is an integer from 0 to 3.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: June 11, 2013
    Assignees: JNC Corporation, JNC Petrochemical Corporation
    Inventors: Mayumi Tanabe, Yoshiharu Hirai
  • Publication number: 20130114010
    Abstract: The present invention relates to polymerisable mixtures and to the use thereof for optical, electro-optical and electronic purposes, in particular in liquid-crystal (LC) media and LC displays, especially in LC displays of the PS (“polymer sustained”) or PSA (“polymer sustained alignment”) type.
    Type: Application
    Filed: June 30, 2011
    Publication date: May 9, 2013
    Applicant: MERCK PATENT GMBH
    Inventors: Achim Goetz, Sven Christian Laut, Andreas Taugerbeck
  • Publication number: 20130105732
    Abstract: A liquid crystal composition with which generation of an alignment defect in a polymer/liquid crystal composite exhibiting a polymer-stabilized blue phase can be reduced is provided. The liquid crystal composition includes a liquid crystal material exhibiting a blue phase; and a liquid crystalline monomer. In the liquid crystalline monomer, the chain length (the sum of carbon atoms and oxygen atoms) of an oxyalkylene group represented as Y in the following general formula (G1) is n (2?n?11). The liquid crystalline monomer has a lower phase transition temperature from a nematic phase to an isotropic phase (TNI) than liquid crystalline monomers including the oxyalkylene groups whose chain lengths are (n?1) and (n+1). In (G1), X represents a mesogenic skeleton; Y represents an oxyalkylene group (including carbon and oxygen), and includes hydrogen or fluorine; and Z1 and Z2 individually represent an acryloyl group or a methacryloyl group.
    Type: Application
    Filed: October 23, 2012
    Publication date: May 2, 2013
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventor: Semiconductor Energy Laboratory Co., Ltd.
  • Patent number: 8404150
    Abstract: The present invention relates to dielectrically positive liquid-crystalline media comprising one or more compounds of the formula I in which the parameters have the meaning indicated in the specification, and optionally one or more compounds selected from the group of the compounds of the formulae II and III in which the parameters have the meaning indicated in the specification, and optionally one or more compounds of the formula IV in which the parameters have the meaning indicated in the specification, and to liquid-crystal displays containing these media, especially to active-matrix displays and in particular to TN, IPS and FFS displays.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: March 26, 2013
    Assignee: Merck Patent GmbH
    Inventors: Michael Wittek, Markus Czanta, Atsutaka Manabe, Lars Lietzau, Marcus Reuter, Brigitte Schuler, Elisabeth Meyer
  • Patent number: 8394293
    Abstract: The present invention relates to thiophene derivatives, to processes and intermediates for the preparation thereof, to the use thereof for optical, electro-optical and electronic purposes, in particular in liquid-crystal (LC) media and LC displays, and to LC media and LC displays comprising same.
    Type: Grant
    Filed: March 30, 2009
    Date of Patent: March 12, 2013
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Axel Jansen, Detlef Pauluth, Harald Hirschmann, Markus Czanta
  • Patent number: 8394292
    Abstract: The present invention relates to dielectrically positive liquid-crystalline media comprising a dielectrically neutral or slightly positive component, component A, comprising one or more dielectrically neutral or slightly positive compounds of the formula I in which the parameters have the meaning indicated in the specification, and a dielectrically positive component, component B, comprising one or more dielectrically positive compounds, and optionally a second dielectrically neutral component, component C, and to liquid-crystal displays containing these media, especially active-matrix displays and in particular TN, IPS and FFS displays.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: March 12, 2013
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Michael Wittek, Brigitte Schuler, Volker Reiffenrath
  • Patent number: 8388860
    Abstract: Isomannide-based compounds having chiral properties are provided, in addition to liquid crystal compositions and polymer networks derived therefrom.
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: March 5, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Marc B Goldfinger, Kai Qi
  • Publication number: 20130048913
    Abstract: The invention is to provide a new liquid crystal compound having a high clearing point, a good compatibility with other compounds, a small viscosity, and a high stability to heat, light and so forth; compound (1) is provided: R1?CF2?nR2??(1) wherein, for example, R1 is alkyl having 4 to 10 carbons or —(CH2)2—CH?CH2, R2 is alkyl having 2 to 10 carbons, n is 8, and R1 and R2 are not allowed to be straight-chain alkyl having an identical number of carbons.
    Type: Application
    Filed: August 23, 2012
    Publication date: February 28, 2013
    Applicants: JNC PETROCHEMICAL CORPORATION, JNC CORPORATION
    Inventors: Hiroyuki TANAKA, Sayaka FUJIMORI
  • Patent number: 8372306
    Abstract: A liquid crystal compound is provided that has excellent characteristics, such as a negatively large dielectric anisotropy. A liquid crystal composition containing the compound, and a liquid crystal display device containing the composition are also provided. A compound having the three factors, i.e., (1) a tetrahydropyran ring, (2) terminal alkenyl chain and (3) exhibits excellent characteristics including a negatively large dielectric anisotropy (??). The use of the compound having the characteristics provides an excellent liquid crystal composition and an excellent liquid crystal display device.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: February 12, 2013
    Assignees: JNC Corporation, JNC Petrochemical Corporation
    Inventor: Tokifumi Masukawa
  • Patent number: 8349209
    Abstract: The invention provides a liquid crystal composition having an optically isotropic liquid crystal phase used in an element driven in a state of an optically isotropic liquid crystal phase, which comprises a compound 1 having the clearing point T1 and a compound 2 having the clearing point T2, and which has the clearing point Tx, wherein the liquid crystal composition comprises 10 to 80 wt % of compound 1 and 20 to 90 wt % of compound 2, and wherein the clearing point T1, the clearing point T2 and the clearing point Tx of the liquid crystal composition satisfy the following conditions: T1>T2 T1?Tx?100° C.
    Type: Grant
    Filed: March 9, 2007
    Date of Patent: January 8, 2013
    Assignees: JNC Corporation, JNC Petrochemical Corporation
    Inventors: Yasuhiro Haseba, Hirotsugu Kikuchi
  • Publication number: 20120326085
    Abstract: The invention relates to liquid-crystalline mixtures comprising at least one compound of the formula I, in which X, L1, L2, L3, L4 and alkenyl have the meanings indicated in claim 1, in order to increase the pretilt at the polyimide surface, and to liquid-crystalline media comprising one or more compounds of the formula I in electro-optical liquid-crystal displays and in LC lenses.
    Type: Application
    Filed: February 15, 2011
    Publication date: December 27, 2012
    Applicant: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Michael Wittek, Brigitte Schuler, Volker Reiffenrath
  • Patent number: 8337718
    Abstract: The subject is to provide a liquid crystal composition that satisfies at least one of characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small viscosity, a suitable optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light, a high stability to heat and a large elastic constant, or that is suitably balanced regarding at least two of the characteristics. The subject is to provide an AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth. The invention provides a liquid crystal composition that has a nematic phase and includes a specific four-ring compound having a high maximum temperature and a large dielectric anisotropy as a first component and a specific compound having a small dielectric anisotropy as a second component, and also provides a liquid crystal display device containing this composition.
    Type: Grant
    Filed: January 24, 2011
    Date of Patent: December 25, 2012
    Assignees: JNC Corporation, JNC Petrochemical Corporation
    Inventors: Shuichi Goto, Kouki Sagou, Hiroaki Fujita
  • Patent number: 8313669
    Abstract: The present invention relates to a liquid-crystal (LC) display of the PS (polymer stabilized) or PSA (polymer sustained alignment) type, and to polymerizable compounds and LC media for use in PS (polymer stabilized) and PSA displays.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: November 20, 2012
    Assignee: Merck Patent Gesellschaft mit Beschränkter Haftung
    Inventors: Georg Bernatz, Andreas Taugerbeck
  • Patent number: 8304035
    Abstract: The present invention relates to a liquid-crystal (LC) display of the PS (polymer stabilized) or PSA (polymer sustained alignment) type, and to polymerisable compounds and LC media for use in PS (polymer stabilized) and PSA displays.
    Type: Grant
    Filed: August 4, 2008
    Date of Patent: November 6, 2012
    Assignee: Merck Patent GmbH
    Inventors: Georg Bernatz, Andreas Taugerbeck
  • Patent number: 8283000
    Abstract: A liquid crystal composition includes 100 parts by mass of a nematic liquid crystal composition having negative dielectric anisotropy and 0.01 to 3 parts by mass of a polymerizable compound of general formula (I). On being irradiated with an energy ray, such as UV rays, the liquid crystal composition provides an LCD capable of high-speed response without undergoing reduction in reliability (voltage holding ratio). In formula (I), rings C1-3 are benzene, cyclohexane or naphthalene; M1-2 are hydrogen or methyl; Z1 is a direct bond, -L1-, -L1O—, etc.; Z4 is a direct bond, -L2-, —OL2-, etc.; at least one of Z1 and Z4 is not a direct bond; L1,2 are C1-C10 alkylene; when Z1?Z4, one or more hydrogen atoms of the rings C1, C2, and C3 are substituted; Z2 and Z3 are each a direct bond, an ester bond, etc.; p and q are each 0 or 1, provided that p+q?1.
    Type: Grant
    Filed: February 2, 2009
    Date of Patent: October 9, 2012
    Assignee: Adeka Corporation
    Inventors: Ken Matsumoto, Masatomi Irisawa
  • Patent number: 8273264
    Abstract: Disclosed are novel liquid-crystal compounds, processes and intermediates for the preparation thereof, the use thereof for optical, electro-optical and electronic purposes, in particular in liquid-crystal (LC) media and LC displays, and to LC media and LC displays containing the same.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: September 25, 2012
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Axel Jansen, Detlef Pauluth, Bernd Fiebranz, Bernhard Rieger
  • Patent number: 8257611
    Abstract: A compound of formula (1): wherein A1 and A2 are —O—, —NR—, —S—, or —CO—, in which R is a hydrogen atom or substituent; Z is one or two atoms selected from a carbon atom or a non-metal atom of Group 14, 15 or 16 in the Periodic Table, and forms a five- or six-membered ring with the C—C?C—C or C?C—C?C; R1, R2, and R3 each are a substituent; m is an integer of 0 to 4; L1 and L2 are a single bond or divalent linking group; X is a non-metal atom of Group 14, 15 or 16 in the Periodic Table, and may have a hydrogen atom or R4; and at least one of R, R1, R2, R3, and R4 is substituted with a polymerizable group; a liquid crystal composition, an optical film, a retardation sheet, a polarizing plate, and a liquid crystal display.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: September 4, 2012
    Assignee: FUJIFILM Corporation
    Inventors: Shigeki Uehira, Michitaka Matsuumi, Shinichi Morishima, Mitsuyoshi Ichihashi, Kotaro Yasuda, Hiroshi Takeuchi
  • Patent number: 8246855
    Abstract: A polymerizable liquid crystal composition is provided that has a wide range where a liquid crystal phase is exhibited, has excellent solubility in an organic solvent, and is facilitated in control of an alignment state. The use of the polymerizable liquid crystal composition provides a polymerizable liquid crystal composition that has good solubility in a solvent with high safety, such as PGMEA, and can control various alignment states. The polymerizable liquid crystal composition in one aspect contains a fluorenone derivative represented by the formula (1) and a compound having a bisphenol skeleton represented by the formula (2).
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: August 21, 2012
    Assignees: JNC Corporation, JNC Petrochemical Corporation
    Inventor: Yoshiharu Hirai
  • Publication number: 20120194775
    Abstract: A novel liquid crystalline compound and/or a liquid crystal composition including the novel liquid crystalline compound that can be used for a variety of liquid crystal devices capable of exhibiting a blue phase with a wide temperature range are/is provided. A liquid crystalline compound represented by the general formula (G1) is provided.
    Type: Application
    Filed: January 26, 2012
    Publication date: August 2, 2012
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Sachiko KAWAKAMI, Yuko Kawata, Momoko Kato, Tetsuji Ishitani, Tomohiro Tamura
  • Patent number: 8231806
    Abstract: The present invention relates to dielectrically positive liquid-crystalline media comprising in each case one or more compounds of the formula I in which the parameters have the respective meanings indicated in the specification, and optionally one or more further dielectrically positive compounds and optionally one or more further dielectrically neutral compounds, and to liquid-crystal displays containing these media, especially to active-matrix displays and in particular to TN, IPS and FFS displays.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: July 31, 2012
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Markus Czanta, Michael Wittek, Lars Lietzau, Marcus Reuter, Brigitte Schuler
  • Patent number: 8216489
    Abstract: The invention provides a liquid crystal compound represented by the following formula having stability to heat, light and so forth, a wide temperature range of a nematic phase, a small viscosity, a large optical anisotropy and a suitable elastic constant K33 (K33: bend elastic constant), and further having a suitable and negative dielectric anisotropy and an excellent compatibility with other liquid crystal compounds, and provides a liquid crystal composition including the compound, wherein R1 and R2 are hydrogen, alkyl or the like, ring A1 is trans-1,4-cyclohexylene, 1,4-phenylene or the like, L1 to L4 are hydrogen or fluorine, and at least three of them are fluorine; when the ring A1 is trans-1,4-cyclohexylene or the like, Z1 is a single bond, —(CH2)2— or the like, when ring A1 is 1,4-phenylene, Z1 is —(CH2)2— or the like.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: July 10, 2012
    Assignees: JNC Corporation, Chisso Petrochemical Corporation
    Inventor: Masahide Kobayashi
  • Patent number: 8211332
    Abstract: The subject is to provide a liquid crystal composition that satisfies at least one characteristic among characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a low viscosity, a suitable optical anisotropy, a negatively large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or that is suitably balanced regarding two or more characteristics. The subject is to provide an AM device that has a short response time, a high voltage holding ratio, a high contrast ratio, a long service life and so forth.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: July 3, 2012
    Assignees: JNC Corporation, Chisso Petrochemical Corporation
    Inventors: Norikatsu Hattori, Subaru Kawasaki
  • Patent number: 8206610
    Abstract: A liquid crystal composition is provided that satisfies at least one of characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small viscosity, a suitable optical anisotropy, a negatively large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or that is suitably balanced regarding at least two of the characteristics. The crystal liquid display device using the composition is suitable for an AM device that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth, and can be used for a liquid crystal projector, a liquid crystal television and so forth.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: June 26, 2012
    Assignees: JNC Corporation, Chisso Petrochemical Corporation
    Inventors: Norikatsu Hattori, Masayuki Saito
  • Patent number: 8182716
    Abstract: Disclosed is a novel liquid crystal compound, a liquid crystal composition comprising the same, and an optical film using the same liquid crystal composition. More particularly, there is provided a liquid crystal material of a viewing angle compensation film with high quality characteristics, which can improve a contrast ratio and minimize variations in color with viewing angles in a black state, a liquid crystal composition comprising the same liquid crystal material, and a compensation film obtained from the same liquid crystal composition.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: May 22, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Jae-Ho Cheong, Min-Jin Ko, Myung-Sun Moon, Bum-Gyu Choi, Dae-Ho Kang, Ki-Youl Lee, Yun-Bong Kim
  • Patent number: 8182717
    Abstract: A liquid crystal composition is provided that satisfies at least one of the characteristics such as a high maximum temperature of a nematic phase, a low minimum temperature of a nematic phase, a small viscosity, a large optical anisotropy, a large dielectric anisotropy, a large specific resistance, a high stability to ultraviolet light and a high stability to heat, or is properly balanced regarding at least two characteristics. An AM device is provided that has a short response time, a large voltage holding ratio, a large contrast ratio, a long service life and so forth. The liquid crystal composition having a negative dielectric anisotropy contains a first component having especially negatively large dielectric anisotropy, a second component having a large negative dielectric anisotropy and a low minimum temperature, a third component having a high maximum temperature or a small viscosity. The liquid crystal display device contains the liquid crystal composition.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: May 22, 2012
    Assignees: JNC Corporation, Chisso Petrochemical Corporation
    Inventor: Masayuki Saito
  • Publication number: 20120105791
    Abstract: A system having a vertically-aligned negative delta E nematic liquid crystal host material and a small amount of liquid crystal polymer is provided. The liquid crystal polymer improves the switching speed of a vertically aligned nematic system without sacrificing contrast or viewing angle.
    Type: Application
    Filed: July 29, 2011
    Publication date: May 3, 2012
    Inventors: Julia A. Kornfield, Michael Wand, Zuleikha Kurji
  • Patent number: 8168083
    Abstract: The present invention relates to an electro-optical light-modulation element of the FFS type, and to electro-optical displays and display systems, such as, for example, television screens and computer monitors, which contain elements of this type. The light-modulation elements according to the invention contain a liquid-crystalline modulation medium which has optimised elastic constants and are distinguished, in particular, by high contrast and/or optimised transmission in addition to good contrast, a low viewing-angle dependence, short response times and low addressing voltages. The present invention likewise relates to the liquid-crystalline modulation media used in the electro-optical light-modulation elements.
    Type: Grant
    Filed: August 26, 2008
    Date of Patent: May 1, 2012
    Assignee: Merck Patent Gesellschaft MIT Beschraenkter Haftung
    Inventors: Mark Goebel, Markus Czanta
  • Patent number: 8168081
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of dielectrically negative, polar compounds which comprises at least one compound of the formula I in which the parameters have the meanings indicated in claim 1, to the use thereof in an electro-optical display, particularly in an active-matrix display based on the VA, ECB, PALC, FFS or IPS effect, and to displays of this type.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: May 1, 2012
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Melanie Klasen-Memmer, Georg Bernatz, Izumi Saito, Matthias Bremer, Lars Lietzau, Volker Reiffenrath
  • Publication number: 20120097895
    Abstract: A liquid crystal composition containing a polymerizable compound according to the present invention is used in a liquid crystal display element to which a liquid crystal alignment capability is provided by polymerization. The composition contains a polymerizable compound that polymerizes without a photopolymerization initiator or with only an extremely small amount of photopolymerization initiator. Therefore, the alignment after the polymerization becomes more stable and the display characteristics do not degrade. Thus, the polymerizable compound is suitable as a practical component of the liquid crystal composition. A liquid crystal display element that uses the liquid crystal composition containing a polymerizable compound according to the present invention can be suitably used for VA and IPS liquid crystal display elements.
    Type: Application
    Filed: April 1, 2010
    Publication date: April 26, 2012
    Applicant: DIC Corporation
    Inventors: Takeshi Kuriyama, Shinichi Hirata, Shotaro Kawakami
  • Patent number: 8163200
    Abstract: The invention relates to liquid-crystalline compounds of the formula I in which R1, R2, A1, A2, A3, A4, Z1, Z2, Z3, V, a, b and c have the meanings indicated in Claim 1, and to liquid-crystalline media comprising at least one compound of the formula I, and to electro-optical displays containing a liquid-crystalline medium of this type.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: April 24, 2012
    Assignee: Merck Patent Gesellschaft MIT Beschraenkter Haftung
    Inventors: Lars Lietzau, Markus Czanta, Atsutaka Manabe, Kai Jaehrling
  • Patent number: 8158020
    Abstract: A liquid crystal element comprising a pair of transparent substrates, a liquid crystal layer which fills in between the pair of substrates and can form a chiral smectic C phase in homeotropic orientation, and an electrode which generates, at least, an electric field (parallel electric field) in directions parallel to a principal face of the substrate for the liquid crystal layer is provided, wherein the liquid crystal layer comprises, at least, a chiral compound of the following general formula (1-I) or a chiral compound of the following general formula (2-I) and a chiral compound of the following general formula (2 -II) in a base liquid crystal material which can provide a phase sequence of an isotropic liquid phase, a nematic phase, a smectic A phase and a smectic C phase from a higher temperature side, wherein R1, A2, Z1, Z2, m and 1 in formula (1-I), X, R1, R2, and * in formula (2-I), and X, R3, R4, R5, and * in formula (2-II) are defined in the specification.
    Type: Grant
    Filed: March 1, 2007
    Date of Patent: April 17, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Yohei Takano, Hiroyuki Sugimoto, Toshiaki Tokita, Koh Fujimura, Yasuyuki Takiguchi, Yumi Matsuki, Haruki Amagawa, Toshiaki Nonaka
  • Patent number: 8158023
    Abstract: Disclosed are a biaxial liquid crystal compound, a liquid crystal composition comprising the same, and an optical film using the same liquid crystal composition. More particularly, there is provided a liquid crystal material of a viewing angle compensation film with high quality characteristics, which can improve a contrast ratio and minimize variations in color with viewing angles in a black state, a liquid crystal composition comprising the same liquid crystal material, and a compensation film obtained from the same liquid crystal composition.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: April 17, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Jae-Ho Cheong, Min-Jin Ko, Myung-Sun Moon, Bum-Gyu Choi, Dae-Ho Kang, Ki-Youl Lee, Yun-Bong Kim
  • Patent number: 8123977
    Abstract: Disclosed is a copolymer for liquid crystal alignment having a photoreactive group, a mesogen group, a thermosetting group, and a crosslinking group, a liquid crystal aligning layer including the copolymer for liquid crystal alignment, and a liquid crystal display including the liquid crystal aligning layer. Since the liquid crystal aligning layer has excellent thermal stability and no residual image, the liquid crystal aligning layer is usefully applied to the liquid crystal display.
    Type: Grant
    Filed: November 6, 2006
    Date of Patent: February 28, 2012
    Assignee: LG Chem, Ltd.
    Inventors: Dong Hyun Oh, Kyung Jun Kim, Jung Ho Jo, Hye Ran Seong, Sang Kook Kim, Byung Hyun Lee
  • Publication number: 20120018672
    Abstract: The invention provides a liquid crystal compound having a high stability to heat, light or the like, a wide temperature range of a nematic phase, a small viscosity, a large optical anisotropy and a suitable elastic constant K33, and further having a suitable negative dielectric anisotropy and an excellent compatibility with other liquid crystal compounds. The invention also provides a liquid crystal composition including this liquid crystal compound and a liquid crystal display device containing this liquid crystal composition. A liquid crystal compound represented by formula (a): For example, Ra and Rb are alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons or alkoxy having 1 to 9 carbons; the ring A1 and the ring A2 are 1,4-phenylene or trans-1,4-cyclohexylene; L1, L2, L3 and L4 are hydrogen or fluorine, and at least three of them are fluorine; and Z1 and Z2 are a single bond, —(CH2)2—, —CH?CH—, —CH2O— or —OCH2—.
    Type: Application
    Filed: January 12, 2010
    Publication date: January 26, 2012
    Applicants: CHISSO PETROCHEMICAL CORPORATION, JNC CORPORATION
    Inventor: Masahide Kobayashi