Search Patents
  • Liquid-crystalline medium
    Patent number: 7670655
    Abstract: Disclosed are liquid-crystalline mediums containing one or more compounds of formula I and uses thereof for electro-optical purposes, e.g., to electro-optical liquid-crystal displays.
    Type: Grant
    Filed: October 3, 2007
    Date of Patent: March 2, 2010
    Assignee: Merck Patent GmbH
    Inventors: Michael Wittek, Lars Lietzau
  • Liquid-crystalline medium
    Publication number: 20030039769
    Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy, which contains at least one compound of formula I 1
    Type: Application
    Filed: April 22, 2002
    Publication date: February 27, 2003
    Applicant: Merck Patent GmbH
    Inventors: Seung-Eun Lee, Nobuo Kubo, Masahiro Iijima, Hideo Ichinose, Yukiomi Takana, Shinji Nakajima, Yasushi Sugiyama, Takanori Takeda
  • Liquid-crystalline medium
    Publication number: 20020061368
    Abstract: 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 1
    Type: Application
    Filed: November 2, 2001
    Publication date: May 23, 2002
    Applicant: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Kazuaki Tarumi, Brigitte Schuler, Eike Poetsch, Volker Reiffenrath, Yukiomi Tanaka
  • Polymerisable monocyclic compounds
    Publication number: 20030160210
    Abstract: The invention relates to polymerisable monocyclic compounds, their use in liquid crystal mixtures, polymers and polymer films, and the use of the compounds, mixtures, polymers and polymer films in optical, electrooptical and electronic devices, for decorative and security applications.
    Type: Application
    Filed: December 23, 2002
    Publication date: August 28, 2003
    Applicant: MERCK PATENT GMBH
    Inventors: Matthias Bremer, Melanie Klasen-Memmer, Dagmar Klement, Stephan Derow
  • Liquid-crystalline medium
    Patent number: 8821757
    Abstract: The invention relates to a liquid-crystalline medium comprising one or more compounds of the formula (I), in which R0 has the meanings indicated in Claim 1, and to the use thereof in electro-optical liquid-crystal displays.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: September 2, 2014
    Assignee: Merck Patent GmbH
    Inventors: Michael Wittek, Brigitte Schuler, Lars Lietzau
  • STN liquid crystal display
    Publication number: 20030148043
    Abstract: The invention relates to supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angular dependences and to the novel nematic liquid-crystal mixtures employed therein, which are distinguished by the fact that they comprise at least one compound of the formula IA 1
    Type: Application
    Filed: December 23, 2002
    Publication date: August 7, 2003
    Applicant: Merck Patent GmbH
    Inventor: Harald Hirschmann
  • LC material with homeotropic alignment
    Patent number: 7648646
    Abstract: The invention relates to a liquid crystal (LC) material that aligns homeotropically on substrates with high or low surface energy.
    Type: Grant
    Filed: May 16, 2006
    Date of Patent: January 19, 2010
    Assignee: Merck Patent Gesellschaft
    Inventors: Richard Harding, Matthew Francis, Owain Llyr Parri, Donald Gordon Graham, Shirley Ann Marden
  • Liquid-crystalline medium
    Patent number: 8486298
    Abstract: The invention relates to a liquid-crystalline medium comprising one or more compounds of the formula I in which R0 and X0 have the meanings indicated in Claim 1, and to the use thereof in electro-optical liquid-crystal displays.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: July 16, 2013
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Christian Hock, Martina Weidner, Volker Reiffenrath
  • Liquid-crystal display
    Patent number: 9212311
    Abstract: The present invention relates to the use of LC (liquid-crystal) compounds and LC media comprising them in LC displays of the PS (polymer stabilized) or PSA (polymer sustained alignment) type.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: December 15, 2015
    Assignee: Merck Patent GmbH
    Inventors: Seung-Eun Lee, Eun Young Kim, Dong-Mee Song, Eun-Kyu Lee
  • Liquid-crystalline medium
    Patent number: 7033652
    Abstract: Liquid-crystalline media comprising at least one compound of the formula I in which X, L1, L2 and L3 are as defined herein, are useful for use in electro-optical displays.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: April 25, 2006
    Assignee: Merck Patent GmbH
    Inventors: Michael Heckmeier, Martin Engel, Brigitte Schuler, Volker Reiffenrath
  • Liquid-crystalline medium
    Patent number: 7622165
    Abstract: Disclosed are a liquid-crystalline medium, which contains one or more compounds of formula I their use for electro-optical purposes, to displays containing this medium, and to novel LC compounds for use in LC media and displays.
    Type: Grant
    Filed: October 3, 2007
    Date of Patent: November 24, 2009
    Assignee: Merck Patent GmbH
    Inventors: Michael Wittek, Lars Lietzau
  • Combination of optical elements
    Patent number: 7175890
    Abstract: The present invention relates to a method of preparing a film that includes at least one layer of anisotropic polymer material. The method can include polymerizing a mixture of a filtered polymerizable mesogenic material.
    Type: Grant
    Filed: October 25, 2004
    Date of Patent: February 13, 2007
    Assignee: Merck Patent GmbH
    Inventors: Mark Verrall, Jeremy Ward, James Hanmer, David Coates
  • As-indacen derivatives
    Patent number: 7517471
    Abstract: The present invention relates to compounds of the formula I where X1, X2, R1, R2, A1, A2, Z1, Z2, m, n and rings B and B? are as defined in claim 1.
    Type: Grant
    Filed: April 12, 2005
    Date of Patent: April 14, 2009
    Assignee: Merck Patent GmbH
    Inventors: Lars Lietzau, Matthias Bremer, Melanie Klasen-Memmer
  • Mono-, oligo- and poly-3-(1,1-difluoroalkyl)thiophenes and their use as charge transport materials
    Publication number: 20030062509
    Abstract: Mono-, oligo- and polymers comprising one or more identical or different recurring units of formula I
    Type: Application
    Filed: July 24, 2002
    Publication date: April 3, 2003
    Applicant: Merck Patent GmbH
    Inventors: Martin Heeney, Louise Farrand, Mark Giles, Marcus Thompson, Steven Tierney, Maxim Shkunov, David Sparrowe, Iain McCulloch
  • Cyclohexane derivatives and liquid-crystalline medium
    Patent number: 6551666
    Abstract: The invention relates to cyclohexane derivatives of the formula I in which n, m, p, R1, X1, X2, Z1, Z2, Z3, A1 A2 and Y are as defined above.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: April 22, 2003
    Assignee: Merck Patent Gesellschaft Mit
    Inventors: Peer Kirsch, Joachim Krause, Michael Heckmeier
  • Liquid-crystalline medium
    Patent number: 6685996
    Abstract: 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: Grant
    Filed: July 2, 2001
    Date of Patent: February 3, 2004
    Assignee: Merck Patent GmbH
    Inventors: Kazuaki Tarumi, Brigitte Schuler, Eike Poetsch, Volker Reiffenrath, Yukiomi Tanaka
  • Liquid-crystalline medium
    Patent number: 7790247
    Abstract: Disclosed are a liquid-crystalline medium, which contains one or more compounds of formula I their use for electro-optical purposes, to displays containing this medium, and to novel LC compounds for use in LC media and displays.
    Type: Grant
    Filed: August 25, 2009
    Date of Patent: September 7, 2010
    Assignee: Merck Patent GmbH
    Inventors: Michael Wittek, Lars Lietzau
  • Flakes comprising non-chiral liquid crystal material
    Patent number: 7297292
    Abstract: The invention relates to liquid crystal flakes, to methods of their preparation and to their use as pigments for security or decorative applications or optical elements.
    Type: Grant
    Filed: June 6, 2003
    Date of Patent: November 20, 2007
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Robert Hammond-Smith, Rodney Riddle, John Patrick
  • Liquid-crystalline medium
    Patent number: 7595101
    Abstract: Disclosed are a liquid-crystalline medium, which contains a compound of formula I and the use thereof for electro-optical purposes, in particular for TN, TFT, IPS or OCB displays.
    Type: Grant
    Filed: October 3, 2007
    Date of Patent: September 29, 2009
    Assignee: Merck Patent GmbH
    Inventors: Michael Wittek, Elvira Montenegro, Konstantin Schneider, Brigitte Schuler
  • Hydrogenated phenanthrenes and their use in liquid-crystal mixture
    Patent number: 6515163
    Abstract: The invention concerns hydrogenated phenanthrenes of formula I wherein the parameters have the meanings given in the text and their use in liquid crystal compositions.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: February 4, 2003
    Assignee: Merck Patent Gesellschaft
    Inventors: Rainer Wingen, Barbara Hornung, Wolfgang Schmidt