Including Fused Or Bridged Rings Patents (Class 252/299.62)
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Patent number: 7341675Abstract: Liquid crystalline polymers containing specified ratios of repeat units derived from hydroquinone, 2,6-naphthalenedicarboxylic acid, 4-hydroxybenzoic acid and optionally terephthalic acid have exceptionally high heat distortion temperatures, making especially useful for service at high temperatures. Compositions containing reinforcing agents, especially fibrous or platy reinforcing agents are particularly useful. These polymers and compositions are useful for electrical and electronic connectors, and as films for the electronics industry, and for other uses.Type: GrantFiled: April 12, 2006Date of Patent: March 11, 2008Assignee: E.I. du Pont de Nemours and CompanyInventors: Richard Alan Jackson, Marion G. Waggoner
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Patent number: 7335403Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy, which comprises at least one compound of the formula (I) in which R0, R1, A1, Z1 and m have the meanings indicated in Claim 1, and to the use thereof for an active-matrix display based on the ECB, PALC or IPS effect.Type: GrantFiled: November 5, 2003Date of Patent: February 26, 2008Assignee: Merck Patent GmbHInventors: Melanie Klasen-Memmer, Matthias Bremer, Lars Lietzau
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Patent number: 7326447Abstract: The present invention relates to benzochromene derivatives of the formula I in which the various parameters are as defined in the text, and to liquid-crystal media which comprise these compounds, and to the use of the media in electro-optical displays, in particular in VAN LCDs.Type: GrantFiled: January 28, 2004Date of Patent: February 5, 2008Assignee: Merck Patent Gesellschaft Mit Beschrankter HaftungInventors: Andreas Taugerbeck, Melanie Klasen-Memmer
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Publication number: 20080014374Abstract: The invention is to provide such a polymerizable liquid crystal composition that is excellent in stability in a solution state, shows good coating property on a supporting substrate, and has uniform homeotropic alignment property. The polymerizable liquid crystal composition of the invention contains an acrylate compound and a bisphenol fluorene compound. The bisphenol fluorene compound is effective for controlling uniform homeotropic alignment of the polymerizable liquid crystal composition.Type: ApplicationFiled: June 20, 2007Publication date: January 17, 2008Inventor: Yoshiharu Hirai
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Patent number: 7316830Abstract: The invention relates to liquid-crystalline phenol esters of the formula I in which R, A1, Z1, m, L and Y are as defined in Claim 1, to liquid-crystalline media comprising at least one phenol ester of the formula I, and to electro-optical displays containing such a liquid-crystalline medium.Type: GrantFiled: August 24, 2006Date of Patent: January 8, 2008Assignee: Merck Patent GmbHInventors: Volker Reiffenrath, Michael Heckmeier, Eike Poetsch, Joachim Krause, Werner Binder, Brigitte Schuler, Achim Götz
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Patent number: 7314654Abstract: An optically anisotropic element comprises a discotic compound. The discotic compound has an oriented discotic plane. The discotic compound has a molecular structure including a discotic core and 3 to 20 combinations of ester bonds (—O—CO—) and 1- or 2-alkenyl groups. The alkenyl group can have a polymerizable group as a substituent group positioned at the terminal. A polymerizable discotic compound having an oriented discotic plane can be polymerized to form an optically anisotropic element. Alignment of the oriented discotic plane is fixed by polymerization. A new triphenylene compound is also disclosed.Type: GrantFiled: January 25, 2005Date of Patent: January 1, 2008Assignee: Fujifilm CorporationInventors: Shigeki Uehira, Michitaka Matsuumi, Atsuhiro Ohkawa
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Patent number: 7303791Abstract: The invention relates to a liquid-crystalline medium comprising at least one compound of the formula I in which X, Z1, Z2, Z3, a, b and c are as defined in Claim 1, and to electro-optical displays containing a liquid-crystalline medium of this type.Type: GrantFiled: October 15, 2002Date of Patent: December 4, 2007Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Martin Engel, Peer Kirsch, Matthias Bremer
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Publication number: 20070272897Abstract: The present invention discloses a liquid crystal composition having a first class compound including a fluorine-containing compound, and a second class compound including a neutral liquid crystal compound, where each terminal group of the neutral crystal compound includes an alkyl group, an alkoxy group, or an alkenyl group. If the neutral liquid crystal compound includes an alkenyl group at the terminal group, the liquid crystal composition includes less than 7 wt % of the neutral crystal compound including the alkenyl group. The present invention also discloses a liquid crystal display including the aforementioned liquid crystal composition.Type: ApplicationFiled: November 6, 2006Publication date: November 29, 2007Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jong-Ho SON, Fusayuki TAKESHITA, Jae-Jin LYU, Yong-Kuk YUN, Hyun-Wuk KIM, Jang-Hyun KIM, Min-Goo SEOK
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Patent number: 7297379Abstract: A compound of the formula (I) is described where R1 and R2 are defined in the specification and p=q=r=0 or 1 with p+q+r?0. The compound of formula (I) has high dielectric anisotropy, thermally stable, fast response time and high voltage holding ratio, which is used as a liquid crystal medium for the liquid-crystal displays such as ECB, in-plane-switching (IPS) and VA display mode.Type: GrantFiled: May 12, 2005Date of Patent: November 20, 2007Assignee: Merck Patent GmbHInventors: Wolfgang Schmidt, Rainer Wingen, Barbara Hornung
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Patent number: 7297378Abstract: Compounds of the formula (I) in which R1, R2, p, q, G and X are each as defined in the description, use of compounds of the formula (I) in liquid-crystal mixtures, liquid-crystal mixture comprising one or more compounds of the formula (I), and a liquid-crystal display comprising an inventive liquid-crystal mixture.Type: GrantFiled: April 26, 2005Date of Patent: November 20, 2007Assignee: Merck Patent GmbHInventors: Wolfgang Schmidt, Rainer Wingen, Barbara Hornung
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Patent number: 7294369Abstract: The invention relates to new polymerisable mesogenic or liquid crystalline compounds comprising a laterally substituted cinnamate group, to polymerisable mesogenic or liquid crystalline mixtures and anisotropic polymers prepared thereof, and to the use of the new compounds and the mixtures and polymers prepared thereof in optical and electrooptical devices, adhesives, synthetic resins with anisotropic mechanical properties, cosmetics, diagnostics, liquid crystal pigments, decorative and security applications, nonlinear optics, optical information storage, electronic devices like organic field effect transistors (FET or OFET), electroluminescent devices, or as chiral dopants.Type: GrantFiled: October 18, 2004Date of Patent: November 13, 2007Assignee: Merck Patent Gesellschaft Mit Beschrankter HaftungInventors: Richard Harding, Ian Victor Edward Hassall, Shirley Ann Marden, Darren Brown
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Patent number: 7291727Abstract: Novel discotic liquid crystalline porphyrins and discotic liquid crystalline metal complexes, methods for their preparation, and device fabrication are disclosed. Materials with partially perfluorinated alkyl group in the peripheral chains show a strong tendency towards the formation of homeotropic alignment. These compounds are capable of being used as high-efficiency photovoltaic materials, organic semiconducting materials, and organic light emitting materials.Type: GrantFiled: December 13, 2006Date of Patent: November 6, 2007Assignee: Kent State UniversityInventors: Quan Li, Xiaoli Zhou
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Patent number: 7291366Abstract: The present invention relates to cyclopenta[b]naphthalene derivatives of the general formula (I) in which Z, A, n, R, L5 and L8 as (II) and (III) are as defined in Claim 1, to the use thereof in liquid-crystalline or mesogenic media, to liquid-crystalline or mesogenic media comprising at least one of these cyclopenta[b]naphthalene derivatives, and to electro-optical display elements containing these liquid-crystalline or mesogenic mediaType: GrantFiled: July 28, 2003Date of Patent: November 6, 2007Assignee: Merck Patent GmbHInventors: Lars Lietzau, Matthias Bremer, Melanie Klasen-Memmer, Michael Heckmeier
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Patent number: 7282246Abstract: Concerning the compound of the formula (I) R1, R3 are each independently, for example, H R2, R4 are each independently, for example, H X1, X2 are each independently H or F M1 is —CO—O—, —O—CO—, —CH2—O—, —O—CH2—, —CF2—O—, —O—CF2—, —CH?CH—, —CF?CF—, —C?C—, —CH2—CH2—CO—O—, —O—CO—CH2—CH2—, —CH2—CH2—, —CF2—CF2—, —(CH2)4—, —OC(?O)CF?CF— or a single bond A1 is, for example, 1,4-phenylene, and R5 has the same possible definitions as specified for R2 and R4, with the exception of —M1-A1-R5, but independently of the particular definitions of R2 and R4 with the following provisos: 1) at least one of X1, X2 has to be F 2) R1, R2, R3 and R4 must not at the same time be H 3) at most two of R1, R2, R3 and R4 may be c).Type: GrantFiled: April 4, 2005Date of Patent: October 16, 2007Assignee: Merck Patent GmbHInventors: Wolfgang Schmidt, Barbara Hornung, Rainer Wingen
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Publication number: 20070221881Abstract: A liquid crystal composition having a negative dielectric anisotropy and including a first component, which is a liquid crystal compound having a chroman ring, in which two hydrogens are replaced by fluorine, a second component, which is a liquid crystal compound having phenylene in which two hydrogens are replaced by fluorine and chlorine, and a particular third component, and a liquid crystal display device including the liquid crystal composition.Type: ApplicationFiled: March 16, 2007Publication date: September 27, 2007Inventors: Atsuko Fujita, Hiroaki Fujita, Norikatsu Hattori
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Patent number: 7273641Abstract: An optically anisotropic element comprises a discotic compound. The discotic compound has an oriented discotic plane. The discotic compound has a molecular structure represented by the formula (I) of D(—O—CO—CR1?CR2—X—R3)n. In the formula (I), D is a discotic core, n is an integer of 3 to 20, each of R1 and R2 is hydrogen, a halogen atom or an alkyl group, X is —O—, —S— or —NR—, and R3 is an alkyl group or an aryl group. A polymerizable discotic compound having an oriented discotic plane can be polymerized to form an optically anisotropic element. Alignment of the oriented discotic plane is fixed by polymerization. A new discotic compound is also disclosed.Type: GrantFiled: February 18, 2005Date of Patent: September 25, 2007Assignee: Fujifilm CorporationInventors: Michitaka Matsuumi, Shigeki Uehira, Atsuhiro Ohkawa
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Patent number: 7270856Abstract: The invention relates to novel cyclobutane derivatives of the formula (I), in which R1, R2, A, Z, m, n and o have the meaning indicated in claim 1, to the use thereof as components of liquid-crystalline media, and to liquid-crystal and electro-optical display elements which contain the liquid-crystalline media according to the inventionType: GrantFiled: November 5, 2003Date of Patent: September 18, 2007Assignee: Merck Patent GmbHInventors: Andreas Taugerbeck, Michael Heckmeier, Peer Kirsch, Georg Luessem, Eike Poetsch
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Patent number: 7265163Abstract: 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: GrantFiled: June 1, 2004Date of Patent: September 4, 2007Assignee: University of HullInventors: Mary O'Neill, Stephen Malcolm Kelly, Adam Edward Alexander Contoret, Gary James Richards
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Publication number: 20070187644Abstract: The invention is to provide such a liquid crystal compound that has general properties required for a liquid crystal compound, stability to heat, light and the like, a small viscosity, a suitable optical anisotropy, a negatively large dielectric anisotropy, a wide temperature range of a nematic phase, and favorable compatibility with other liquid crystal compounds, and a liquid crystal composition containing the compound.Type: ApplicationFiled: February 14, 2007Publication date: August 16, 2007Inventor: Yasuyuki Sasada
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Patent number: 7255900Abstract: In the compound of the formula (I), where: R1, R2 are each independently, for example, H or a straight-chain or branched alkyl radical p, q are each independently 0 or 1, i.e. at the value zero, —H is present at the appropriate position instead of —F M1 is —CO—O—, —O—CO—, —CH2—O—, —O—CH2—, —CF2—O—, —O—CF2—, —CH?CH—, —CF?CF—, —C?C—, —CH2—CH2—CO——O—, —O—CO—CH2—CH2—, —CH2—CH2—, —CF2—CF2—, —(CH2)4—, —OC(?O)CF?CF— or a single bond A1 is, for example, 1,4-phenylene R5 has the same possible definitions as specified for R1 and R2, with the exception of —M1—A1—R5, but independently of the definition of R1 and R2 X is H, F, OF3, CF3, OCF2H with the following provisos: a) at least one of p, q has to be 1 b) R1 and R2 must not at the same time be H c) R2 and X must not at the same time be H.Type: GrantFiled: April 28, 2005Date of Patent: August 14, 2007Assignee: Merck Patent GmbHInventors: Wolfgang Schmidt, Rainer Wingen, Barbara Hornung
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Patent number: 7250198Abstract: Liquid-crystalline compounds of the formula I in which R1, A1, A2, Z1, Z2, X, a, b, L1, L2 and L3 are as defined herein, 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: GrantFiled: September 30, 2002Date of Patent: July 31, 2007Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Peer Kirsch, Joachim Krause, Alexander Hahn, Andreas Ruhl
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Patent number: 7247355Abstract: The present invention relates to a compound having a chroman ring, which has good thermal and optical stability, adequate optical anisotropy, adequate dielectric anisotropy and superior compatibility with other liquid crystal compounds, a liquid crystal composition comprising the compound, and a liquid crystal device comprising the composition.Type: GrantFiled: December 16, 2005Date of Patent: July 24, 2007Assignees: Chisso Corporation, Chisso Petrochemical CorporationInventors: Kouki Sagou, Atsuko Fujita
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Publication number: 20070152189Abstract: Novel discotic liquid crystalline porphyrins and discotic liquid crystalline metal complexes, methods for their preparation, and device fabrication are disclosed. Materials with partially perfluorinated alkyl group in the peripheral chains show a strong tendency towards the formation of homeotropic alignment. These compounds are capable of being used as high-efficiency photovoltaic materials, organic semiconducting materials, and organic light emitting materials.Type: ApplicationFiled: December 13, 2006Publication date: July 5, 2007Inventors: Quan Li, Xiaoli Zhou
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Patent number: 7232592Abstract: The present invention provides a nematic liquid crystal composition using a 4,6-difluoroindane-based compound that has a low lower limit temperature (T?N) of the liquid crystal phase, high upper limit temperature (TN-I) of the liquid crystal phase, and wide liquid crystal phase temperature range without impairing response speed, threshold voltage and other liquid crystal characteristics within a the range of the optimal ?n as a nematic liquid crystal, and a 4,6-difluoroindane-based compound that is used in said liquid crystal composition. The nematic liquid crystal composition contains at least one type of compound having a 4,6-difluoroindan-2,5-diyl group, and the refractive index anisotropy is within the range of 0.08 to 0.15, the liquid crystal phase upper limit temperature is 70° C. or higher, the liquid crystal phase lower limit temperature is ?20° C. or lower, and the difference between the liquid crystal phase upper limit temperature and liquid crystal phase lower limit temperature is 90° C. or more.Type: GrantFiled: November 27, 2003Date of Patent: June 19, 2007Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Yasuo Umezu, Shotaro Kawakami, Kiyofumi Takeuchi, Tetsuo Kusumoto, Shinji Ogawa
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Patent number: 7226644Abstract: The present invention relates to a liquid crystal compound which has negative dielectric anisotropy and a large absolute value thereof; and a liquid crystal display element which contains the compound as a constituent element and has a negative value of dielectric anisotropy in the vertical alignment mode, IPS, or the like. The liquid-crystal display element has a structure including a pair of substrates and a liquid crystal sandwiched therebetween, and includes at least an alignment control layer, a transparent electrode, and a polarizing plate, in which the liquid crystal includes at least one compound having a partial structure represented by general formula (A): (wherein W1 and W2 each independently represents fluorine, chlorine, —CF3, —CF2H, —OCF3, or —OCF2H) and has negative dielectric anistropy.Type: GrantFiled: June 25, 2004Date of Patent: June 5, 2007Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Takashi Matsumoto, Tetsuo Kusumoto, Shotaro Kawakami
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Patent number: 7223450Abstract: The invention relates to chiral compounds of formula I wherein X1,X2,X1,X2,x1,x2,y1,y2,B,C,U1,U2,V1,V2,W1 and W2 have the meaning given in claim 1, to liquid crystal mixtures comprising at least one chiral compound of formula I, to chiral linear or crosslinked liquid crystal polymers obtainable by polymerizing a polymerizade mixture comprising at least one chiral compound of formula I, to the use of chiral compound of formula I and mixtures and polymers obtained thereof in liquid crystal display, active and passive optical elements, adhesives, synthetic resins with anisotropic mechanical properties, cosmetic and pharmaceutical compositions, diagnostics, liquid crystal pigments, for decorative and security applications, nonlinear optics, optical information storage or as chiral dopants, and to a liquid crystal display comprising a mixture comprising at least one chiral compound of formula I.Type: GrantFiled: April 25, 2002Date of Patent: May 29, 2007Assignee: Merck GmbHInventors: Andreas Taugerbeck, Peer Kirsch, Detlef Pauluth, Joachim Krause, Juliane Suermann, Michael Heckmeier
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Patent number: 7201950Abstract: A novel optical compensatory sheet is disclosed. The sheet comprises an optically anisotropic layer comprising at least one compound selected from the group represented by Formula (I): where L1, L2 and L3 respectively represent a single bond, NRa, where Ra is a hydrogen atom (H), an optionally substituted alkyl or aryl group, oxygen atom (O) or sulfur atom (S); A1, A2 and A3 respectively represent an alkylene group; R1, R2 and R3 respectively represent a substituent group; m1, m2 and m3 respectively represent an integer not less than 0, at least one of m1, m2 and m3 is not 0, when m1 and m2 are 0, L3 represents NH or S; and when m1, m2 and m3 are respectively not less than 2, plural A1, A2 or A3 may be same or different each other.Type: GrantFiled: March 12, 2004Date of Patent: April 10, 2007Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeki Uehira, Shinichi Morishima, Minoru Uchida
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Patent number: 7198827Abstract: A nematic liquid crystal composition comprising compounds of the general formulas (I-1) to (I-5) each having naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl and 1,2,3,4-tetrahydronaphthalene-2,6-diyl, and a liquid display device using the same. This nematic liquid crystal composition broadens the operating temperature range of liquid crystal display characteristics due to an improvement in co-solubility and storage at low temperature, thereby making it possible to improve a reduction in driving voltage and a change in temperature and to attain comparatively fast response characteristics for a predetermined driving voltage. Accordingly, the nematic liquid crystal composition is best suited for use as TN, STN, TFT, IPS, MVA, OCB, ECB, PC, PNLC, PDLC, PSCT or the like.Type: GrantFiled: September 10, 1999Date of Patent: April 3, 2007Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Kiyofumi Takeuchi, Haruyoshi Takatsu, Hirokazu Yanagihara
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Patent number: 7199167Abstract: 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: GrantFiled: June 2, 2004Date of Patent: April 3, 2007Assignee: University of HullInventors: Mary O'Neill, Stephen Malcolm Kelly, Adam Edward Alexander Contoret, Gary James Richards
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Patent number: 7182885Abstract: Fluorinated indenes and 1,7-dihydroindacenes of the general formulae (I) and (II) of negative dielectric anisotropy (??<0) in which T, A, R, L, X, Y, U, W, Z, n, m, p and q are as defined herein are suitable for use in liquid crystal display elements.Type: GrantFiled: April 4, 2003Date of Patent: February 27, 2007Assignee: Merck Patent GmbHInventors: Lars Lietzau, Melanie Klasen-Memmer, Matthias Bremer
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Patent number: 7179511Abstract: The invention relates to liquid-crystalline phenol esters of the formula I in which R, A1, Z1, m, L and Y are as defined in Claim 1, to liquid-crystalline media comprising at least one phenol ester of the formula I, and to electro-optical displays containing such a liquid-crystalline medium.Type: GrantFiled: May 13, 2005Date of Patent: February 20, 2007Assignee: Merck Patent GmbHInventors: Volker Reiffenrath, Michael Heckmeier, Eike Poetsch, Joachim Krause, Werner Binder, Brigitte Schuler, Achim Götz
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Patent number: 7169449Abstract: A liquid crystal display device produced through the steps of injecting a polymerizable monomer-containing liquid crystal composition between two substrates and, while applying a voltage between opposing transparent electrodes of the substrates, polymerizing the monomer, wherein the polymerizable monomer contained in the liquid crystal composition has one or more ring or condensed ring structures and functional groups bonded directly to the ring or condensed ring structure. The monomer is preferably represented by the following general formula: P1-A1-(Z1-A2)n-P2 wherein P1 and P2 are acrylates or the like, A1 and A2 are 1,4-phenylenes or the like, Z1 is —COO— or the like, and n is 0 to 2.Type: GrantFiled: October 15, 2004Date of Patent: January 30, 2007Assignees: Sharp Kabushiki Kaisha, Merck Patent GmbHInventors: Yohei Nakanishi, Masakazu Shibasaki, Kazutaka Hanaoka, Yuichi Inoue, Kazuaki Tarumi, Matthias Bremer, Melanie Klasen-Memmer, Simon Greenfield, Richard Harding
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Patent number: 7166239Abstract: 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: GrantFiled: June 1, 2004Date of Patent: January 23, 2007Assignee: University of HullInventors: Mary O'Neill, Stephen Malcolm Kelly, Adam Edward Alexander Contoret, Gary James Richards
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Patent number: 7157124Abstract: A compound represented by formula (1) or (2) and a polymer obtained by polymerizing the compound are provided: wherein Ra is one of the groups represented by Formulas (3-1) to (3-5); Rb is hydrogen, halogen, or a side chain such as —CN, —NCO, —NCS or alkyl having a carbon number of 1 to 20; A is a cyclic diyl group such as 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, naphthalene-2,6-diyl, tetrahydronaphthalene-2,6-diyl, fluorene-2,7-diyl, bicyclo[2.2.2]oct-1,4-diyl or bicyclo[3.1.0]hex-3,6-diyl, wherein at least one A is substituted 1,4-phenylene represented by Formula (4-1) or (4-2); Z is a single bond or a bonding group such as alkylene having a carbon number of 1 to 20; Rc is hydrogen, halogen, —CF3 or alkyl having a carbon number of 1 to 5; m is an integer of 1 to 6, and q is 0 or 1.Type: GrantFiled: January 5, 2004Date of Patent: January 2, 2007Assignees: Chisso Petrochemical Corporation, Chisso CorporationInventors: Yasuyuki Sasada, Kazuhiko Saigusa
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Patent number: 7153548Abstract: 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: GrantFiled: January 9, 2004Date of Patent: December 26, 2006Assignee: Fuji Photo Film Co., Ltd.Inventors: Hideyuki Nishikawa, Atsuhiro Ohkawa
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Patent number: 7145047Abstract: Disclosed in a novel liquid-crystalline compound which is a naphthalene derivative useful as an electro-optical liquid crystal display material, a liquid crystal composition containing such naphthalene derivatives and a liquid crystal display device comprising the same. The naphthalene derivative provided by the present invention exhibits an excellent liquid-crystallinity and miscibility with currently widely used liquid crystal compositions or compositions. The addition of the naphthalene derivative makes it possible to drastically lower the threshold voltage of the liquid crystal composition while maintaining its high response. The naphthalene derivative of the present invention is characterized by a large birefringence index. Further, most of the naphthalene derivative of the present invention has no strongly polar group in its molecule and thus can also be used for active matrix driving.Type: GrantFiled: August 21, 2002Date of Patent: December 5, 2006Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Sadao Takehara, Masashi Osawa, Haruyoshi Takatsu, Makoto Negishi
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Patent number: 7144608Abstract: A color-correcting polarizer is provided comprising a polarizer layer and at least one discotic film layer. The discotic film layer is optically transparent within the range of visible wavelength. The discotic film layer works as a polarizer in the wavelength ranges at least from 380 to 500 nm and/or from 600 to 780 nm. A liquid crystal cell comprising the color correcting polarizer is also disclosed.Type: GrantFiled: June 18, 2003Date of Patent: December 5, 2006Assignee: Nitto Denko CorporationInventors: Michael V. Paukshto, Louis D. Silverstein
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Patent number: 7128953Abstract: An optical film comprises a transparent support and a polarizing layer. The polarizing layer selectively transmits polarized light, and selectively reflects or scatters other polarized light. The polarizing layer contains a compound represented by the formula (I) of Ar1—C?C—Ar3—C?C—Ar2. In the formula (I), each of Ar1 and Ar2 independently is a monovalent aromatic group, and Ar3 is a divalent aromatic group.Type: GrantFiled: February 19, 2002Date of Patent: October 31, 2006Assignee: Fuji Photo Film Co., Ltd.Inventors: Atsuhiro Ohkawa, Hiroki Sasaki, Kensuke Morita, Ichiro Amimori
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Patent number: 7125589Abstract: A compound represented by the following formula (1), a composition comprising the composition and an element comprising the composition: Ra is alkyl having 1 to 15 carbons and so forth; A1, A2 and A3 are 1,4-cyclohexylene and so forth; Z1, Z2 and Z3 are a single bond and so forth; n and m are 0 or 1; and phenyl having (F)p is phenyl, 2-fluorophenyl and so forth.Type: GrantFiled: April 9, 2003Date of Patent: October 24, 2006Assignees: Chisso Corporation, Chisso Petrochemical CorporationInventors: Keiji Kimura, Shuichi Matsui
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Patent number: 7122228Abstract: The invention relates to indanes having negative ?? of the formula Ia or Ib in which R, A, Z, X, Y, V, W, n and m are as defined in claim 1. The compounds are particularly suitable for producing VA-TFT displays.Type: GrantFiled: July 19, 2002Date of Patent: October 17, 2006Assignee: Merck Patent GmbHInventors: Volker Reiffenrath, Michael Heckmeier, Matthias Bremer
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Patent number: 7122227Abstract: The invention relates to chiral photoisomerizable compounds of formula (I) wherein X1, X2, X3, X4, X5 and X6 have the meanings given in claim 1, to liquid crystalline mixtures and polymers containing them, and to the use of chiral photoisomerizable compounds, liquid crystalline mixtures and polymers containing them in optical and electrooptical devices like liquid crystal displays or projection systems, in optical elements like polarizers, retardation films, compensators, color filters or holographic elements, in liquid crystal pigments and colored films or coatings for decorative or security applications, cosmetic and pharmaceutical compositions, in nonlinear optics and optical information storage.Type: GrantFiled: September 21, 2001Date of Patent: October 17, 2006Assignee: Merck Patent GesellschaftInventors: Julian Vaughn-Spickers, Simon Greenfield, Ian Victor Edward Hassall, Christopher Dunn, Richard Harding, Tony Jenkins, Alison May
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Patent number: 7118786Abstract: An optical compensatory sheet comprises a transparent support and an optically anisotropic layer. The optically anisotropic layer is formed from liquid crystal molecules. Three principal refractive indices of the optically anisotropic layer are different from each other.Type: GrantFiled: December 30, 2003Date of Patent: October 10, 2006Assignee: Fuji Photo Film Co., Ltd.Inventors: Eiichiro Aminaka, Hideyuki Nishikawa, Ken Kawata
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Patent number: 7105106Abstract: Thermotropic liquid crystalline polymers are produced by the reaction of a polyester made from an aromatic dicarboxylic acid and a diol, one or more hydroxycarboxylic acids, a stoichiometric excess of an aromatic diol, and a carboxylic acid anhydride. Also disclosed are novel liquid crystalline polymers that may be produced by this process. These liquid crystalline polymers are useful as molding resins and shaped articles thereof are produced. In particular, the articles include films, sheets, containers and portions thereof comprising these LCPs.Type: GrantFiled: July 11, 2003Date of Patent: September 12, 2006Assignee: E. I. du Pont de Nemour and CompanyInventors: Michael Robert Samuels, Marion Glen Waggoner, Julius Uradnisheck
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Patent number: 7105210Abstract: 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 and one or more compounds of the formula IA in which R1, R2, ring A, L1-8, Z1, X1 and X2 are as defined in claim 1.Type: GrantFiled: March 5, 2004Date of Patent: September 12, 2006Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Izumi Saito, Sabine Schoen, Peer Kirsch
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Patent number: 7101595Abstract: The present invention provides a compound represented by formula (1) defined in the specification. The invention further provides a liquid crystal composition comprising at least two compounds, which at least one compound out of them is the above compound. The invention still further provides a polymer obtained by polymerizing the above composition, and uses of the polymer such as a molded article having an optical anisotropy, an optical compensation element, a wavelength functional plate, an optical element, and a liquid crystal display element comprising the polymer.Type: GrantFiled: July 29, 2004Date of Patent: September 5, 2006Assignees: Chisso Corporation, Chisso Petrochemical CorporationInventors: Ryushi Shundo, Hiromichi Inoue, Tomohiro Etou
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Patent number: 7094359Abstract: An object of the present invention is to provide a micro powder capable of producing a thin film with precision thickness. This object is achieved by a micro powder having an average particle size of from 0.5 to 50 ?m, obtained by grinding a liquid crystalline polyester having a flow beginning temperature of from 200° C. to 270° C.Type: GrantFiled: March 13, 2003Date of Patent: August 22, 2006Assignee: Sumitomo Chemical Company, LimitedInventors: Satoshi Okamoto, Manabu Hirakawa
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Patent number: 7087272Abstract: The invention relates to fluorinated fluorene derivatives of negative DC anisotropy, of the formula I R1—(—A1—Z1—)k1—(—A2—Z2—)k2—W—(—Z3—A3—)k3—(—Z4—A4—)k4—R2I in which W denotes the sub-formula L1 and L2, independently of one another, are H, F, Cl, —CH2F, —CHF2 or —CF3, with the proviso that L1 and L2 are not both H, L3 and L4, independently of one another, are H or F, and R1, R2, A1, A2, A3, A4, Z1, Z2, Z3, Z4, k1, k2, k3 and k4 are as defined above. The invention furthermore relates to liquid-crystalline media and to optical and electro-optical display elements.Type: GrantFiled: March 7, 2002Date of Patent: August 8, 2006Assignee: Merck Patent GmbHInventors: Matthias Bremer, Detlef Pauluth, Melanie Klasen-Memmer
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Patent number: 7081279Abstract: Liquid crystalline compounds having a large negative ?? low viscosity, a large K33/K11 value, a small ??/?? and mutually excellent solubility even at low temperature, compositions containing at least one of the compounds and liquid crystal display devices containing such a liquid crystal compositions are disclosed.Type: GrantFiled: August 29, 2003Date of Patent: July 25, 2006Assignee: Chisso CorporationInventors: Takashi Kato, Tomoyuki Kondo, Henry Bernhardt, Shuichi Matsui, Hiroyuki Takeuchi, Yasuhiro Kubo, Fusayuki Takeshita, Etsuo Nakagawa
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Patent number: 7078078Abstract: An optical compensatory sheet comprises a transparent support and an optically anisotropic layer. The optically anisotropic layer is formed from liquid crystal molecules and monomers having four or more double bonds. The monomers are polymerized to form a polymer in the optically anisotropic layer.Type: GrantFiled: January 23, 2002Date of Patent: July 18, 2006Assignee: Fuji Photo Film Co., Ltd.Inventor: Yoji Ito
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Patent number: 7078079Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterised in that it comprises one or more compounds of the general formula I in which R1, L1, L2, L3, L4, L5, L6, Z1, Z2, X, v and u are as defined in claim 1.Type: GrantFiled: September 20, 2001Date of Patent: July 18, 2006Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Achim Goetz, Peer Kirsch, Detlef Pauluth, Matthias Bremer, Sabine Schoen, Georg Lüssem, Christian Hock