Benzene Rings Linked By Direct Bond Patents (Class 252/299.65)
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Patent number: 12066706Abstract: A liquid crystal/polymer composite electrically controlled dimming film is provided, including a liquid crystal material, a polymer matrix, and two layers of conductive substrates. The polymer matrix is sandwiched between the two layers of conductive substrates, and the polymer matrix has a porous microstructure. The liquid crystal material is dispersed in the polymer matrix to form liquid crystal microdroplets, and the liquid crystal microdroplets have vertically oriented polymer networks. The liquid crystal/polymer composite electrically controlled dimming film has a unique composite microstructure. In this composite microstructure, the polymer matrix of the porous microstructure gives the film with good mechanical processing performance.Type: GrantFiled: June 7, 2023Date of Patent: August 20, 2024Assignee: PEKING UNIVERSITYInventors: Huai Yang, Xiao Wang, Lanying Zhang
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Patent number: 12000203Abstract: A privacy glazing structure may include an electrically controllable optically active material that provides controlled transition between a privacy or scattering state and a visible or transmittance state. To make electrical connections with electrode layers that control the optically active material, the privacy glazing structure may include an offset pane arrangement. The structure may include first and second panes that contain an optically active material. The two panes may be sandwiched by two laminated outer panes. In some examples, the first and second panes are recessed relative to the laminated outer panes along their side edges to define recesses in which electrical connection features are positioned.Type: GrantFiled: March 26, 2021Date of Patent: June 4, 2024Assignee: Cardinal IG CompanyInventors: Eric Bjergaard, Andrew DeMiglio
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Patent number: 11634638Abstract: Provided are a liquid crystal composition which has excellent planarity in a case of being formed into a coating film and is also capable of forming a reflective layer having excellent diffuse reflectivity, a reflective layer that is formed using the liquid crystal composition, and a method for producing a reflective layer. Provided also is a copolymer that can be used as an alignment control agent for a liquid crystal compound.Type: GrantFiled: April 1, 2020Date of Patent: April 25, 2023Assignee: FUJIFILM CorporationInventors: Shunya Katoh, Keisuke Kodama, Yuko Suzuki
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Patent number: 11339296Abstract: Novel reaction media for electron donating and electron accepting components in colour-change compositions are described. The compound is of formula (I): wherein R1, and R2 are selected from a linear or branched alkyl group, alkenyl group, alkoxy group, aryl group and an alkylene aryl group having from 6 to 22 carbon atoms; X1 and X2 are selected from —OC(O)—, —CO2— and O; R3, R4 and R5 are selected from hydrogen and an linear or branched alkyl group, cycloalkyl group, alkenyl group, alkoxy group, aryl and alkylene aryl group; R6 is selected from hydrogen, R3, —X1R1 and aryl and halogen; Y1 Y2 Y3 and Y4 are selected from hydrogen, R3, —OR3 and halogen; a is 0 to 4; b is 0 or 1; x and y are independently is 0 or 1 provided that where x and y are 0, a is 0 and b is 1 and R6 is —CO2R1; and wherein when a is 0 and b is 1 and R5 or R6 is phenyl, R6 and R5 respectively are not hydrogen or C1-7alkyl.Type: GrantFiled: September 5, 2016Date of Patent: May 24, 2022Assignee: Societe BICInventors: Bagavant Shivkumar, Philippe Marrec
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Patent number: 10725001Abstract: A liquid crystal composition includes a nematic liquid crystal, and a compound of Formula (I) where R is an alkyl, aryl, aralkyl or heteroaryl having 6 to 30 carbon atoms, wherein the compound accounts for 0.3 to 0.6% of the liquid crystal composition. Further, a sensing device includes a substrate, a frame, an alignment film, the liquid crystal composition as described above, and two polarizers. The frame is connected to the substrate and forms an accommodation space having an opening, and the alignment film and the liquid crystal composition are both located inside the accommodation space. One of the polarizers is arranged in correspondence with the opening such that a channel exists between the polarizer and the frame, the other polarizer is located at a lateral side of the substrate, and the polarization directions of the two polarizers intersect with each other.Type: GrantFiled: July 7, 2017Date of Patent: July 28, 2020Assignee: TAMKANG UNIVERSITYInventors: Chih-Hsin Chen, Wei-Long Chen, Tsung-Yang Ho
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Patent number: 10539848Abstract: 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: GrantFiled: August 3, 2016Date of Patent: January 21, 2020Assignee: I-CORE TECHNOLOGY, LLCInventor: Akihiro Mochizuki
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Patent number: 9458381Abstract: 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: GrantFiled: July 3, 2014Date of Patent: October 4, 2016Assignee: 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
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Publication number: 20150079380Abstract: 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: ApplicationFiled: September 10, 2014Publication date: March 19, 2015Applicant: FUJIFILM CORPORATIONInventors: Ayako MURAMATSU, Shinnosuke SAKAI, Teruki NIORI, Shinichi MORISHIMA
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Patent number: 8980383Abstract: 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: GrantFiled: December 17, 2009Date of Patent: March 17, 2015Assignee: Cambridge Enterprise LimitedInventors: Harry J. Coles, Damian J. Gardiner
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Publication number: 20150060734Abstract: 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: ApplicationFiled: October 22, 2013Publication date: March 5, 2015Applicant: Chunghwa Picture Tubes, LTD.Inventors: Chun-Wei Su, Jian-Hua Chen
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Patent number: 8920674Abstract: 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: GrantFiled: September 14, 2012Date of Patent: December 30, 2014Assignees: JNC Corporation, JNC Petrochemical CorporationInventors: Takayoshi Yanai, Norikatsu Hattori, Hiroyuki Tanaka
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Patent number: 8778223Abstract: 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: GrantFiled: May 24, 2012Date of Patent: July 15, 2014Assignee: LC Vision, LLCInventor: Michael Wand
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Patent number: 8685275Abstract: 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: GrantFiled: April 24, 2013Date of Patent: April 1, 2014Assignee: Merck Patent GmbHInventors: Norihiko Tanaka, Makoto Murakami, Shinji Nakajima
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Patent number: 8663497Abstract: 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: GrantFiled: October 19, 2010Date of Patent: March 4, 2014Assignee: Adeka CorporationInventors: Ken Matsumoto, Masatomi Irisawa
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Patent number: 8603358Abstract: 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: GrantFiled: April 1, 2010Date of Patent: December 10, 2013Assignee: DIC CorporationInventors: Takeshi Kuriyama, Shinichi Hirata, Shotaro Kawakami
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Publication number: 20130270481Abstract: 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: ApplicationFiled: December 14, 2011Publication date: October 17, 2013Applicant: Toray Industries, Inc.Inventors: Kohei Miyamoto, Mitsushige Hamaguchi, Hideyuki Umetsu
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Patent number: 8545717Abstract: 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: GrantFiled: July 4, 2008Date of Patent: October 1, 2013Assignee: LG Chem, Ltd.Inventors: Yong Il Cho, Dae Hee Lee, Sin Young Kim, Hee Jean Lee, Su Young Ryu
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Patent number: 8512596Abstract: 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: GrantFiled: December 8, 2009Date of Patent: August 20, 2013Assignees: 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
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Patent number: 8506842Abstract: 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: GrantFiled: May 10, 2010Date of Patent: August 13, 2013Assignees: JNC Corporation, JNC Petrochemical CorporationInventors: Takahiro Miyairi, Norikatsu Hattori
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Patent number: 8470198Abstract: 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: GrantFiled: July 16, 2009Date of Patent: June 25, 2013Assignee: Merck Patent GmbHInventors: Kevin Adlem, Owain Llyr Parri
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Patent number: 8465672Abstract: 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: GrantFiled: July 17, 2007Date of Patent: June 18, 2013Assignee: Merck Patent GmbHInventors: Lars Lietzau, Markus Czanta, Atsutaka Manabe
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Patent number: 8460577Abstract: 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: GrantFiled: November 16, 2010Date of Patent: June 11, 2013Assignees: JNC Corporation, JNC Petrochemical CorporationInventors: Mayumi Tanabe, Yoshiharu Hirai
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Publication number: 20130114010Abstract: 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: ApplicationFiled: June 30, 2011Publication date: May 9, 2013Applicant: MERCK PATENT GMBHInventors: Achim Goetz, Sven Christian Laut, Andreas Taugerbeck
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Publication number: 20130105732Abstract: 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: ApplicationFiled: October 23, 2012Publication date: May 2, 2013Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventor: Semiconductor Energy Laboratory Co., Ltd.
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Patent number: 8404150Abstract: 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: GrantFiled: January 23, 2009Date of Patent: March 26, 2013Assignee: Merck Patent GmbHInventors: Michael Wittek, Markus Czanta, Atsutaka Manabe, Lars Lietzau, Marcus Reuter, Brigitte Schuler, Elisabeth Meyer
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Patent number: 8394292Abstract: 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: GrantFiled: January 15, 2009Date of Patent: March 12, 2013Assignee: Merck Patent Gesellschaft mit beschränkter HaftungInventors: Michael Wittek, Brigitte Schuler, Volker Reiffenrath
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Patent number: 8394293Abstract: 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: GrantFiled: March 30, 2009Date of Patent: March 12, 2013Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Axel Jansen, Detlef Pauluth, Harald Hirschmann, Markus Czanta
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Patent number: 8388860Abstract: Isomannide-based compounds having chiral properties are provided, in addition to liquid crystal compositions and polymer networks derived therefrom.Type: GrantFiled: August 14, 2008Date of Patent: March 5, 2013Assignee: E I du Pont de Nemours and CompanyInventors: Marc B Goldfinger, Kai Qi
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Publication number: 20130048913Abstract: 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: ApplicationFiled: August 23, 2012Publication date: February 28, 2013Applicants: JNC PETROCHEMICAL CORPORATION, JNC CORPORATIONInventors: Hiroyuki TANAKA, Sayaka FUJIMORI
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Patent number: 8372306Abstract: 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: GrantFiled: June 10, 2009Date of Patent: February 12, 2013Assignees: JNC Corporation, JNC Petrochemical CorporationInventor: Tokifumi Masukawa
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Patent number: 8349209Abstract: 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: GrantFiled: March 9, 2007Date of Patent: January 8, 2013Assignees: JNC Corporation, JNC Petrochemical CorporationInventors: Yasuhiro Haseba, Hirotsugu Kikuchi
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Publication number: 20120326085Abstract: 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: ApplicationFiled: February 15, 2011Publication date: December 27, 2012Applicant: Merck Patent Gesellschaft Mit Beschrankter HaftungInventors: Michael Wittek, Brigitte Schuler, Volker Reiffenrath
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Patent number: 8337718Abstract: 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: GrantFiled: January 24, 2011Date of Patent: December 25, 2012Assignees: JNC Corporation, JNC Petrochemical CorporationInventors: Shuichi Goto, Kouki Sagou, Hiroaki Fujita
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Patent number: 8313669Abstract: 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: GrantFiled: July 31, 2008Date of Patent: November 20, 2012Assignee: Merck Patent Gesellschaft mit Beschränkter HaftungInventors: Georg Bernatz, Andreas Taugerbeck
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Patent number: 8304035Abstract: 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: GrantFiled: August 4, 2008Date of Patent: November 6, 2012Assignee: Merck Patent GmbHInventors: Georg Bernatz, Andreas Taugerbeck
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Patent number: 8283000Abstract: 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: GrantFiled: February 2, 2009Date of Patent: October 9, 2012Assignee: Adeka CorporationInventors: Ken Matsumoto, Masatomi Irisawa
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Patent number: 8273264Abstract: 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: GrantFiled: January 15, 2010Date of Patent: September 25, 2012Assignee: Merck Patent Gesellschaft Mit Beschrankter HaftungInventors: Axel Jansen, Detlef Pauluth, Bernd Fiebranz, Bernhard Rieger
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Patent number: 8257611Abstract: 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: GrantFiled: December 14, 2007Date of Patent: September 4, 2012Assignee: FUJIFILM CorporationInventors: Shigeki Uehira, Michitaka Matsuumi, Shinichi Morishima, Mitsuyoshi Ichihashi, Kotaro Yasuda, Hiroshi Takeuchi
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Patent number: 8246855Abstract: 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: GrantFiled: August 31, 2009Date of Patent: August 21, 2012Assignees: JNC Corporation, JNC Petrochemical CorporationInventor: Yoshiharu Hirai
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Publication number: 20120194775Abstract: 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: ApplicationFiled: January 26, 2012Publication date: August 2, 2012Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Sachiko KAWAKAMI, Yuko Kawata, Momoko Kato, Tetsuji Ishitani, Tomohiro Tamura
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Patent number: 8231806Abstract: 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: GrantFiled: February 25, 2009Date of Patent: July 31, 2012Assignee: Merck Patent Gesellschaft mit beschränkter HaftungInventors: Markus Czanta, Michael Wittek, Lars Lietzau, Marcus Reuter, Brigitte Schuler
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Patent number: 8216489Abstract: 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: GrantFiled: March 25, 2009Date of Patent: July 10, 2012Assignees: JNC Corporation, Chisso Petrochemical CorporationInventor: Masahide Kobayashi
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Patent number: 8211332Abstract: 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: GrantFiled: December 16, 2009Date of Patent: July 3, 2012Assignees: JNC Corporation, Chisso Petrochemical CorporationInventors: Norikatsu Hattori, Subaru Kawasaki
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Patent number: 8206610Abstract: 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: GrantFiled: July 23, 2009Date of Patent: June 26, 2012Assignees: JNC Corporation, Chisso Petrochemical CorporationInventors: Norikatsu Hattori, Masayuki Saito
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Patent number: 8182717Abstract: 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: GrantFiled: March 25, 2009Date of Patent: May 22, 2012Assignees: JNC Corporation, Chisso Petrochemical CorporationInventor: Masayuki Saito
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Patent number: 8182716Abstract: 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: GrantFiled: January 22, 2008Date of Patent: May 22, 2012Assignee: 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
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Publication number: 20120105791Abstract: 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: ApplicationFiled: July 29, 2011Publication date: May 3, 2012Inventors: Julia A. Kornfield, Michael Wand, Zuleikha Kurji
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Patent number: 8168081Abstract: 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: GrantFiled: July 17, 2007Date of Patent: May 1, 2012Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Melanie Klasen-Memmer, Georg Bernatz, Izumi Saito, Matthias Bremer, Lars Lietzau, Volker Reiffenrath
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Patent number: 8168083Abstract: 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: GrantFiled: August 26, 2008Date of Patent: May 1, 2012Assignee: Merck Patent Gesellschaft MIT Beschraenkter HaftungInventors: Mark Goebel, Markus Czanta
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Publication number: 20120097895Abstract: 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: ApplicationFiled: April 1, 2010Publication date: April 26, 2012Applicant: DIC CorporationInventors: Takeshi Kuriyama, Shinichi Hirata, Shotaro Kawakami