Search Patents
  • Liquid-crystalline medium
    Patent number: 7854970
    Abstract: Disclosed are a liquid-crystalline medium based on a mixture of polar compounds which contain at least one compound of formula I and the use thereof for a passive-matrix or active-matrix display based on the ECB, FFS, PALC or IPS effect.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: December 21, 2010
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Melanie Klasen-Memmer, Axel Jansen, Izumi Saito
  • 2,6-di-tert-butylphenols
    Patent number: 6444278
    Abstract: The present invention relates to 2,6-di-tert-butylphenols of the formula I in which R, A1 A2, Z1, Z2 m and n are as defined herein, and their use as stabilizers or antioxidants.
    Type: Grant
    Filed: October 10, 1997
    Date of Patent: September 3, 2002
    Assignee: Merck Patent Gesellschaft Mit Beschraenkter Haftung
    Inventors: Volker Reiffenrath, Joachim Krause
  • Compound having negative ??
    Patent number: 7122228
    Abstract: 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: Grant
    Filed: July 19, 2002
    Date of Patent: October 17, 2006
    Assignee: Merck Patent GmbH
    Inventors: Volker Reiffenrath, Michael Heckmeier, Matthias Bremer
  • Liquid crystalline medium
    Patent number: 7981487
    Abstract: Disclosed are a liquid-crystalline medium of negative dielectric anisotropy based on a mixture of polar compounds, which contains at least one compound of formula IA and at least one compound of formulae IB, IC and/or ID and the use thereof for an active-matrix display, in particular based on the ECB, PALC, FFS or IPS effect.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: July 19, 2011
    Assignee: Merck Patent GmbH
    Inventors: Melanie Klasen-Memmer, Matthias Bremer
  • Liquid-crystalline medium
    Patent number: 6929833
    Abstract: Liquid-crystalline mediums based on a mixture of polar compounds having positive dielectric aniostropy, characterized in that they comprise one or more compounds of the general formula I in which R, A1, Z1, Y and L are as defined herein, are suitable for use in MLC, TN and STN dispalys.
    Type: Grant
    Filed: April 4, 2003
    Date of Patent: August 16, 2005
    Assignee: Merck Patent GmbH
    Inventors: Kazuaki Tarumi, Brigitte Schuler, Eike Poetsch, Volker Reiffenrath, Yukiomi Tanaka
  • Liquid-crystalline medium and liquid-crystal display having high twist
    Patent number: 7887717
    Abstract: The present invention relates to a liquid-crystalline medium having high twist, to the use thereof for electro-optical purposes, and to displays containing this medium.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: February 15, 2011
    Assignee: Merck Patent Gesellschaft Mit Beschranker Haftung
    Inventors: Akihiro Kojima, Makoto Murakami, Fumio Shimano, Jeong-Hee Sung
  • Liquid-crystalline medium
    Patent number: 7425355
    Abstract: A liquid-crystalline medium based on a mixture of polar compounds which comprises at least one compound of the formula I in which R11, R12, and L1-6 have the meanings indicated in Claim 1, is described. Also described is the use thereof for an active-matrix display based on the ECB, PALC, FFS or IPS effect.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: September 16, 2008
    Assignee: Merck Patent GmbH
    Inventors: Melanie Klasen-Memmer, Matthias Bremer, Elvira Montenegro
  • Liquid-crystalline medium and liquid-crystal display
    Patent number: 7842358
    Abstract: Disclosed are dielectrically positive liquid-crystalline media comprising in each case one or more compounds of formulae IA, IB and IC: and liquid-crystal displays containing these media, especially active-matrix displays, and in particular TN, IPS and FFS displays.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: November 30, 2010
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Markus Czanta, Izumi Saito
  • Liquid crystal medium
    Patent number: 6793983
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it comprises one or more compounds of the general formula I and at least one compound of the formula in which the substituents are as defined in claim 1.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: September 21, 2004
    Assignee: Merck Patent GmbH
    Inventors: Michael Heckmeier, Brigitte Schuler, Kazuaki Tarumi, Peer Kirsch, Volker Reiffenrath
  • Liquid-crystalline medium
    Patent number: 6846523
    Abstract: A liquid-crystalline medium of positive dielectric anisotropy and high optical anisotropy, comprising one or more compounds of the formula I and one or more compounds of the formulae II and/or III and its use in electro-optical displays and projection systems, in particular LCoS™ displays and displays based on a birefringence effect, such as OCB displays, is described.
    Type: Grant
    Filed: March 8, 2004
    Date of Patent: January 25, 2005
    Assignee: Merck Patent GmbH
    Inventors: Atsutaka Manabe, Matthias Bremer
  • Liquid-crystalline medium and liquid crystal display
    Patent number: 8574456
    Abstract: The invention relates to a liquid-crystalline medium comprising one or more compounds of the formula I in which R0, X0 and L1-6 have the meanings indicated in Claim 1, and to the use thereof in electro-optical liquid-crystal displays.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: November 5, 2013
    Assignee: Merck Patent GmbH
    Inventors: Michael Wittek, Brigitte Schuler, Volker Reiffenrath, Mark Goebel, Markus Czanta
  • Liquid crystal medium containing thiophene derivatives
    Patent number: 8906261
    Abstract: The present invention relates to liquid-crystalline media (LC media) comprising thiophene derivatives and to liquid-crystal displays (LC displays) containing these LC media. The media have high optical anisotropy and preferably have a content of thiophene derivatives of 25% by weight or more.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: December 9, 2014
    Assignee: MERCK PATENT GmbH
    Inventors: Michael Wittek, Brigitte Schuler, Axel Jansen
  • Liquid crystalline medium
    Patent number: 7732021
    Abstract: The invention relates to liquid-crystalline compounds of the formula I and to a liquid-crystalline medium based on a mixture of polar compounds, characterised in that it comprises one or more compounds of the formula I in which R1, X, L1, L2 and L3 have the meanings indicated in Claim 1.
    Type: Grant
    Filed: June 8, 2005
    Date of Patent: June 8, 2010
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Atsutaka Manabe, Elvira Montenegro, Detlef Pauluth
  • Liquid-crystal medium
    Patent number: 7731865
    Abstract: The present invention relates to liquid-crystal (LIQUID CRYSTALLINE) media comprising polymerizable compounds, in particular for use in LIQUID CRYSTALLINE displays of the PS (polymer stabilized) or PSA (polymer sustained alignment) type, and to PS(A) displays containing LIQUID CRYSTALLINE media of this type.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: June 8, 2010
    Assignee: Merck Patent GmbH
    Inventors: Georg Bernatz, Andreas Taugerbeck, Matthias Bremer, Achim Goetz
  • Cyclobutane and spiro[3.3]heptane compounds
    Patent number: 7744968
    Abstract: The present invention relates to cyclobutane and spiro[3.3]heptane compounds, to a process for the preparation thereof, to the use thereof as components in liquid-crystalline media, and to electro-optical display elements which contain these liquid-crystalline media.
    Type: Grant
    Filed: August 16, 2006
    Date of Patent: June 29, 2010
    Assignee: Merck Patent GmbH
    Inventors: Volker Reiffenrath, Matthias Bremer, Melanie Klasen-Memmer
  • Fluorinated naphthalenes, liquid-crystal mixtures comprising them, and liquid-crystal displays
    Patent number: 7014890
    Abstract: Compounds of the formula (I) in which the parameters are as defined herein, are suitable for use in liquid-crystal media and liquid-crystal displays which contain these media.
    Type: Grant
    Filed: June 9, 2003
    Date of Patent: March 21, 2006
    Assignee: Merck Patent GmbH
    Inventors: Matthias Bremer, Melanie Klasen-Memmer, Barbara Hornung, Wolfgang Schmidt, Rainer Wingen
  • Liquid-crystalline medium
    Patent number: 6790489
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of negative dielectric anisotropy which comprises at least one compound of the formula I in which R11, R12, A1, Z1, ring A and m are as defined in claim 1, and to the use thereof for an active matrix display based on the ECB or IPS effect.
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: September 14, 2004
    Assignee: Merck Patent GmbH
    Inventors: Melanie Klasen-Memmer, Eike Poetsch, Volker Reiffenrath
  • Liquid-crystal display
    Patent number: 9005720
    Abstract: Disclosed are liquid-crystal (LC) media for use in LC displays of the PS (polymer stabilized) or PSA (polymer sustained alignment) type which contain a liquid-crystal (LC) mixture that contains one or more compounds of formula I
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: April 14, 2015
    Assignee: Merck Patent GmbH
    Inventors: Achim Goetz, Melanie Klasen-Memmer, Stephan Derow, Sabine Schoen, Peter Best
  • Thiophene derivatives, and LC media comprising same
    Patent number: 8486297
    Abstract: The present invention relates to thiophene derivatives, to processes and intermediates for the preparation thereof, to the use thereof for optical, electro-optical and electronic purposes, in particular in liquid-crystal (LC) media and LC displays, and to LC media and LC displays comprising same.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: July 16, 2013
    Assignee: Merck Patent GmbH
    Inventors: Axel Jansen, Detlef Pauluth, Harald Hirschmann, Markus Czanta
  • 2,4?-Substituted 6-cyclohexyl-trans-decalines
    Patent number: 6916513
    Abstract: The invention relates to 2,4?-substituted 6-cyclohexyl-trans-decalins of the general formula I in which R1, R2 and Z are as defined in Claim 1, to the use thereof as components of liquid-crystalline media, and to a liquid-crystal display element and an electro-optical display element.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: July 12, 2005
    Assignee: Merck Patent GmbH
    Inventors: Matthias Bremer, Detlef Pauluth, Georg Lüssem