Patents by Inventor Kazuaki Tarumi
Kazuaki Tarumi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20170088776Abstract: The present invention relates to nematic liquid-crystal media of negative dielectric anisotropy which have a peak time (tmax.) of 0.25 ms or less, which is determined as described in the disclosure, and which preferably have a value of the quotient of the peak time and the square of the birefringence (tmax/?n2) of 22 ms or less, and to the use of these liquid-crystal media in liquid-crystal displays, and to these liquid-crystal displays.Type: ApplicationFiled: December 12, 2016Publication date: March 30, 2017Applicant: Merck Patent GmbHInventors: Melanie KLASEN-MEMMER, Izumi SAITO, Herbert PLACH, Kazuaki TARUMI
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Patent number: 9550942Abstract: The present invention relates to nematic liquid-crystal media of negative dielectric anisotropy which have a peak time (tmax.) of 0.25 ms or less, which is determined as described in the disclosure, and which preferably have a value of the quotient of the peak time and the square of the birefringence (tmax/?n2) of 22 ms or less, and to the use of these liquid-crystal media in liquid-crystal displays, and to these liquid-crystal displays.Type: GrantFiled: June 13, 2005Date of Patent: January 24, 2017Assignee: Merck Patent GmbHInventors: Melanie Klasen-Memmer, Izumi Saito, Herbert Plach, Kazuaki Tarumi
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Patent number: 8945420Abstract: The invention relates to an electro-optical liquid-crystal display which contains, as dielectric, a liquid-crystalline medium having negative dielectric anisotropy and includes a backlight which essentially only emits light having a wavelength of 400 nm or more or has, between the liquid-crystal layer and the backlight, a cut-off filter which essentially only allows light having a wavelength of 420 nm or more to pass through. In particular, the liquid-crystalline medium comprises a) a (first) dielectrically negative component (component A) which consists of one or more dielectrically negative compounds of the formula I in which the parameters have the meanings indicated in claim 2, and a further (second) dielectrically negative component (component B).Type: GrantFiled: January 17, 2011Date of Patent: February 3, 2015Assignee: Merck Patent GmbHInventors: Atsutaka Manabe, Kazuaki Tarumi, Hubert Spreitzer, Axel Jansen, Melanie Klasen-Memmer
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Publication number: 20120307177Abstract: The invention relates to an electro-optical liquid-crystal display which contains, as dielectric, a liquid-crystalline medium having negative dielectric anisotropy and includes a backlight which essentially only emits light having a wavelength of 400 nm or more or has, between the liquid-crystal layer and the backlight, a cut-off filter which essentially only allows light having a wavelength of 420 nm or more to pass through. In particular, the liquid-crystalline medium comprises a) a (first) dielectrically negative component (component A) which consists of one or more dielectrically negative compounds of the formula I in which the parameters have the meanings indicated in claim 2, and a further (second) dielectrically negative component (component B).Type: ApplicationFiled: January 17, 2011Publication date: December 6, 2012Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNGInventors: Atsutaka Manabe, Kazuaki Tarumi, Hubert Spreitzer, Axel Jansen, Melanie Klasen-Memmer
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Patent number: 8277684Abstract: The invention relates to a liquid-crystalline medium of negative dielectric anisotropy based on a mixture of polar compounds, which comprises at least one compound selected from the group of the compounds of the formulae IA, IB and IC in which R1A, R2A, R1B, R2B, R1C, R2C, L, m, n, o, p and b have the meanings indicated in Claim 1, and to the use thereof for an active-matrix display, in particular based on the ECB, PALC, FFS or IPS effect.Type: GrantFiled: August 7, 2008Date of Patent: October 2, 2012Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Melanie Klasen-Memmer, Matthias Bremer, Kazuaki Tarumi
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Publication number: 20110193020Abstract: The invention relates to a liquid-crystalline medium of negative dielectric anisotropy based on a mixture of polar compounds, which comprises at least one compound selected from the group of the compounds of the formulae IA, IB and IC in which R1A, R2A, R1B, R2B, R1C, R2C, L, m, n, o, p and b have the meanings indicated in Claim 1, and to the use thereof for an active-matrix display, in particular based on the ECB, PALC, FFS or IPS effect.Type: ApplicationFiled: August 7, 2008Publication date: August 11, 2011Inventors: Melanie Klasen-Memmer, Matthias Bremer, Kazuaki Tarumi
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Publication number: 20090213318Abstract: The present invention relates to nematic liquid-crystal media of negative dielectric anisotropy which have a peak time (tmax.) of 0.25 ms or less, which is determined as described in the disclosure, and which preferably have a value of the quotient of the peak time and the square of the birefringence (tmax/?n2) of 22 ms or less, and to the use of these liquid-crystal media in liquid-crystal displays, and to these liquid-crystal displays.Type: ApplicationFiled: June 13, 2005Publication date: August 27, 2009Inventors: Melanie Klasen-Memmer, Izumi Saito, Herbert Plach, Kazuaki Tarumi
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Patent number: 7318950Abstract: The invention relates to chiral compounds of formula (I) R1—X1-(A1-Z1)m-G-(Z2-A2)n-X2—R2, wherein R1, R2, X1, X2, A1, A2, Z1, Z2, G, m and n have the meaning given in claim 1, to liquid crystalline mixtures comprising at least one chiral compound of formula (I), to chiral linear or crosslinked liquid crystalline polymers obtainable by polymerizing a polymerizable mixture comprising at least one chiral compound of formula (I), to the use of chiral compounds of formula (I) and mixtures and polymers obtained thereof in liquid crystal displays, 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: June 25, 2001Date of Patent: January 15, 2008Assignee: Merck GmbHInventors: Peer Kirsch, Andreas Tangerbeck, Detlef Pauluth, Joachim Krause, Michael Heckmeier, Kazuaki Tarumi
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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: 7166337Abstract: The present invention relates to liquid-crystal mixtures having specific resistance values, comprising acidic compounds. The present invention furthermore relates to liquid-crystal displays containing these liquid-crystal mixtures. The invention furthermore relates to compounds of the formula I, in which the parameters are as defined in the text, to their preparation, and to their use for achieving certain specific resistance values in liquid-crystal mixtures. The application also relates to a method of adjusting the specific resistance of liquid-crystal mixtures using acidic compounds.Type: GrantFiled: July 19, 2001Date of Patent: January 23, 2007Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventors: Michael Darius, Volker Reiffenrath, Kazuaki Tarumi, Bernhard Rieger, Michael Heckmeier, Marcus Reuter, Peer Kirsch
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Patent number: 7135210Abstract: The invention relates to liquid crystal compounds of formula (I), where X1, X2, X3, Z1, Z2, L1, L2, L3, L4, L5, L6, L7, L8, L9, L10, L11 and a have the meanings given in claim 1, and liquid crystal media containing at least one compound of formula (I) and electro-optical displays comprising such a liquid crystal mediumType: GrantFiled: October 14, 2002Date of Patent: November 14, 2006Assignee: Merck Patent GmbHInventors: Peer Kirsch, Detlef Pauluth, Andreas Ruhl, Joachim Krause, Kazuaki Tarumi, Michael Heckmeier
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Patent number: 7105209Abstract: The invention relates to an alignment layer comprising a polymerized liquid crystal material with homeotrophic orientation, to methods of its preparation, to polymerizable liquid crystal compositions and liquid crystal polymers used for the preparation of the alignment layer, to liquid crystal devices comprising the alignment layer, and to a method of controlling the electrooptical steepness of a liquid crystal display comprising at least one alignment layer by varying the surface anchoring energy of the alignment layer.Type: GrantFiled: November 22, 2001Date of Patent: September 12, 2006Assignee: Merck KGaAInventors: Michael Heckmeier, Melanie Klasen-Memmer, Georg Lüssem, Kazuaki Tarumi, David Coates, Owain Llyr Parri, Mark Verrall, Mark John Goulding, Stephen Christopher Kitson
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Patent number: 7081280Abstract: A liquid-crystalline medium containing a mixture of polar compounds of positive dielectric anisotropy. The mixture contains one or more compounds of formula I in which: R is H, an alkyl or alkenyl radical having 1 to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, where one or more CH2 groups in these radicals are optionally, in each case independently of one another, replaced by —O—, —S—, —CO—, —CO—O—, —O—CO— or —O—CO—O in such a way that O atoms are not linked directly to one another; is a trans-1,4-cyclohexylene ring, in which one or two CH2 groups are optionally replaced by —O— and/or —S—, or a cyclohexenylene ring; Y is halogenated alkyl, halogenated alkenyl, halogenated alkoxy or halogenated alkenyloxy having 1 to 6 carbon atoms; Z is —OCH2—, —CH2CH2—, —CH?CH—, —CF2O—, —OCF2—, —C2F4— or a single bond; and n is 1 or 2.Type: GrantFiled: July 2, 2004Date of Patent: July 25, 2006Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Kazuaki Tarumi, Peer Kirsch, Volker Reiffenrath
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Patent number: 7060331Abstract: The invention relates to chiral compounds of formula (I) wherein R1, R2, A1, A2, X1, X2, Z3 and m have the meaning give in claim 1, to liquid crystalline mixtures comprising at least one chiral compound of formula (I), to chiral linear or crosslinked liquid crystalline polymers obtainable by polymerizing a polymerizable mixture comprising at least one chiral compound of formula (I), to the use of chiral compounds of formula (I) and mixtures and polymers obtained thereof in liquid crystal displays, 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: June 25, 2001Date of Patent: June 13, 2006Assignee: Merck Patent GmbHInventors: Peer Kirsch, Andreas Tangerbeck, Detlef Pauluth, Joachim Krause, Michael Heckmeier, Kazuaki Tarumi
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Patent number: 7041345Abstract: The invention relates to chiral compounds of formula (I) wherein Y1, Y2, Y3, Y4, X1, X2, X3 and X4 have the meaning given in claim 1, to liquid crystalline mixtures comprising at least one chiral compound of formula (I), to chiral linear or crosslinked liquid crystalline polymers obtainable by polymerizing a polymerizable mixture comprising at least one chiral compound of formula (I), to the use of chiral compounds of formula (I) and mixtures and polymers obtained thereof in liquid crystal displays, 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: June 25, 2001Date of Patent: May 9, 2006Assignee: Merck Patent GmbHInventors: Peer Kirsch, Andreas Tangerbeck, Detlef Pauluth, Joachim Krause, Michael Heckmeier, Kazuaki Tarumi
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Patent number: 7033654Abstract: A liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, which medium exhibits a birefringence value of ?0.065 and includes one or more compounds of formula Ia and at least one compound of the formula Xc or Xd: in which R, alkyl, alkenyl and alkenyl* are as defined in claim 1.Type: GrantFiled: July 2, 2004Date of Patent: April 25, 2006Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Kazuaki Tarumi, Peer Kirsch, Volker Reiffenrath
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Patent number: 7029730Abstract: The invention relates to CF2O-bridged cyclohexane derivatives, in particular compounds of formula (I), R1-(-A1-Z1-)k1-Q-CF2O-A2-(-Z3-A3-)K3-R2, wherein Q represents group (a); W1, W2 represent —CH2— and/or —O— independendy from each other, X1, X2, X3, X4 represent H, F, —CH3—CH2F—CH2F and/or —CF3 independently from each other, provided that at least one substituent X1, X2, X3 and/or X4 does not represent H, Z2 represents a simple bond, —CH2—CH2— or —CF2—CF2—, m represents 0 or 1 and R1, R2, A1, A2, A3, Z1, Z3, k1 and k3 have the meaning cited in the description. The invention further relates to liquid crystal substances such as optical and electro-optical display elements.Type: GrantFiled: May 2, 2002Date of Patent: April 18, 2006Assignee: Merck Patent GmbHInventors: Peer Kirsch, Andreas Taugerbeck, Detlef Pauluth, Joachim Krause, Kazuaki Tarumi, Georg Lüssem
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Patent number: 7029731Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I in which R, A1, Z1, Y and L are as defined in claim 1.Type: GrantFiled: August 6, 2003Date of Patent: April 18, 2006Assignee: Merck Patent GmbHInventors: Kazuaki Tarumi, Brigitte Schuler, Eike Poetsch, Volker Reiffenrath, Yukiomi Tanaka
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Patent number: 7026020Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, which medium comprises one or more compounds the general formula Ia and one or more compounds selected from the group consisting of compounds of the formula III and V to VIII: The notations r, R, R0, X0, Z0 and Y1-4 are defined herein.Type: GrantFiled: July 2, 2004Date of Patent: April 11, 2006Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Kazuaki Tarumi, Peer Kirsch, Volker Reiffenrath
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Patent number: 6953610Abstract: A liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, which contains: one or more compounds of the general formula I ?in which R, ?Y, Z and n are as defined in claim 1, one or more compounds of the following formulae IIa, IIb, IIc and IId and one or more compounds of the formula in which Ro, Xo, Y2 and r are as defined in claim 1.Type: GrantFiled: July 2, 2004Date of Patent: October 11, 2005Assignee: Merck Patent GmbHInventors: Michael Heckmeier, Brigitte Schuler, Kazuaki Tarumi, Peer Kirsch, Volker Reiffenrath