Search Patents
  • Liquid-crystalline mixtures
    Patent number: 6821582
    Abstract: A liquid-crystalline mixture that contains one or more compounds of each of the formulae IA, IB and IC and to the use thereof in TN, STN and IPS displays.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: November 23, 2004
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Volker Reiffenrath, Marcus Reuter, Sabine Schoen, Sven Schüpfer, Clarissa Weller
  • Liquid-crystalline medium
    Patent number: 6951669
    Abstract: A liquid-crystalline medium having a mixture of polar compounds of positive dielectric anisotropy is described.
    Type: Grant
    Filed: July 2, 2004
    Date of Patent: October 4, 2005
    Assignee: Merck Patent GmbH
    Inventors: Michael Heckmeier, Brigitte Schuler, Kazuaki Tarumi, Peer Kirsch, Volker Reiffenrath
  • LIQUID CRYSTALLINE MEDIUM
    Publication number: 20120305843
    Abstract: The invention relates to a liquid-crystalline medium which comprises at least one compound of the formula I, and to the use thereof for an active-matrix display, in particular based on the VA, PSA, PS-VA, PALC, FFS or IPS effect.
    Type: Application
    Filed: January 31, 2011
    Publication date: December 6, 2012
    Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Melanie Klasen-memmer, Matthias Bremer, Konstantin Schneider
  • Liquid-crystalline medium and liquid-crystal display having high twist
    Patent number: 8349415
    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: June 23, 2011
    Date of Patent: January 8, 2013
    Assignee: Merck Patent Gesellschaft mit Beschränkter Haftung
    Inventors: Akihiro Kojima, Fumio Shimano
  • Liquid-crystalline medium
    Patent number: 8585922
    Abstract: The invention relates to a liquid-crystalline medium comprising one or more compounds of the formula I in which R0, ring A and L1-4 have the meanings indicated in Claim 1, and to the use thereof in electro-optical liquid-crystal displays.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: November 19, 2013
    Assignee: MERCK PATENT GmbH
    Inventors: Michael Wittek, Brigitte Schuler, Harald Hirschmann, Volker Reiffenrath, Markus Czanta, Christian Schoenefeld
  • Liquid-crystal display
    Publication number: 20140022473
    Abstract: Disclosed are liquid-crystal (LC) media for use in LC displays of the PS (polymer stabilised) or PSA (polymer sustained alignment) type which contain a liquid-crystal (LC) mixture that contains one or more compounds of formula I
    Type: Application
    Filed: July 3, 2013
    Publication date: January 23, 2014
    Applicant: MERCK PATENT GmbH
    Inventors: Achim GOETZ, Melanie KLASEN-MEMMER, Stephan DEROW, Sabine SCHOEN, Peter BEST
  • LIQUID-CRYSTALLINE MEDIUM
    Publication number: 20130248762
    Abstract: The invention relates to liquid-crystalline media comprising at least one compound of the formula I, in which R0, R0* and ring A have the meanings indicated in Claim 1, and to electro-optical liquid-crystal displays, in particular for TN-TFT, OCB, IPS, PS-IPS, FFS, PS-FFS and positive VA applications.
    Type: Application
    Filed: November 14, 2011
    Publication date: September 26, 2013
    Applicant: Merck Patent GmbH
    Inventors: Harald Hirschmann, Michael Wittek, Markus Czanta, Brigitte Schuler, Volker Reiffenrath
  • LIQUID-CRYSTAL MEDIUM
    Publication number: 20110042615
    Abstract: 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 formula I and one or more compounds selected from the compounds of the formulae IA and IB in which R1, R2, L1-4, X1 and X2 have the meanings indicated in claim 1.
    Type: Application
    Filed: December 23, 2008
    Publication date: February 24, 2011
    Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Georg Luessem, Christian Hock, Brigitte Schuler, Eike Poetsch
  • POLYMERISABLE MIXTURES AND THE USE THEREOF IN LIQUID CRYSTAL DISPLAYS
    Publication number: 20130114010
    Abstract: 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: Application
    Filed: June 30, 2011
    Publication date: May 9, 2013
    Applicant: MERCK PATENT GMBH
    Inventors: Achim Goetz, Sven Christian Laut, Andreas Taugerbeck
  • Nematic liquid-crystal composition, and liquid-crystal display using same
    Patent number: 6376030
    Abstract: Nematic liquid-crystal compositions of negative dielectric anisotropy comprising compounds of the formula I are useful in plasma-addressed liquid-crystal displays.
    Type: Grant
    Filed: September 13, 1999
    Date of Patent: April 23, 2002
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Michael Heckmeier, Marcus Reuter
  • Pentafluorosulfuranylbenzene derivatives
    Patent number: 6630210
    Abstract: The invention relates to pentafluorosulfuranylbenzene derivatives of the formula I in which R1, A1, A2, Z1, L1, L2, L3 and n are as defined herein and to the use thereof in liquid-crystalline media.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: October 7, 2003
    Assignee: Merck GmbH
    Inventors: Peer Kirsch, Joachim Krause, Michael Heckmeier
  • POLYMERISABLE COMPOUNDS AND THE USE THEREOF IN LIQUID-CRYSTAL DISPLAYS
    Publication number: 20130308081
    Abstract: The present invention relates to polymerisable compounds, to processes and intermediates for the preparation thereof, 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: Application
    Filed: December 27, 2011
    Publication date: November 21, 2013
    Applicant: Merck Patent GmbH
    Inventors: Andreas Taugerbeck, Achim Goetz, Alexander Hahn, Martin Engel
  • Electro-optical liquid-crystal display
    Patent number: 6800338
    Abstract: To provide an electro-optical liquid-crystal displays with low addressing voltages and low to moderate multiplex ratios, in particular STN displays, organic alignment layers of low layer thickness are utilized.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: October 5, 2004
    Assignee: Merck Patentgesellschaft
    Inventors: Thomas Jacob, Juliane Suermann
  • Liquid crystal propene or propenyl nitrile derivatives
    Patent number: 6444279
    Abstract: Acetylene derivatives of the formula I in which R, A1, A2, Z1, Z2, Z3, L1, L2, L3, Y, m and n are as defined herein are suitable as components of liquid-crystalline media.
    Type: Grant
    Filed: January 24, 2000
    Date of Patent: September 3, 2002
    Assignee: Merck Patent GmbH
    Inventors: Volker Reiffenrath, Harald Hirschmann
  • Liquid-crystalline medium
    Patent number: 6964794
    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 formula I in which R1, L1 and L2 are as defined in claim 1.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: November 15, 2005
    Assignee: Merck Patent GmbH
    Inventors: Michael Heckmeier, Brigitte Schuler, Izumi Saito, Volker Reiffenrath, Georg Luessem, Christian Hock
  • Pyran-dioxane derivatives, and the use thereof in liquid-crystalline media
    Patent number: 7674507
    Abstract: The invention relates to pyran-dioxane derivatives and to the use thereof as component(s) in liquid-crystalline media. In addition, the present invention relates to liquid-crystal and electro-optical display elements which contain the liquid-crystalline media according to the invention.
    Type: Grant
    Filed: May 3, 2006
    Date of Patent: March 9, 2010
    Assignee: Merck Patent GmbH
    Inventors: Lars Lietzau, Markus Czanta
  • Liquid-crystalline medium
    Patent number: 6808763
    Abstract: The invention relates to a liquid-crystalline medium which is characterized in that it comprises one or more compounds of the formula A and one more compounds of the formula B in which Ra, Rb, Rbb, x and L1 are as defined in claim 1.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: October 26, 2004
    Assignee: Merck Patent GmbH
    Inventors: Harald Hirschmann, Sven Schüpfer, Martina Weidner, Renate Graulich
  • Liquid-crystal medium
    Patent number: 10988691
    Abstract: The present invention relates to dielectrically positive liquid-crystalline media comprising one or more compounds of the formula I and II in which the parameters have the respective meanings indicated in claim 1, and to liquid-crystal displays, especially active-matrix displays and in particular displays of the vertically aligned mode, containing these media.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: April 27, 2021
    Assignee: Merck Patent GmbH
    Inventors: Takanori Takeda, Masahiko Okamura, Norihiko Tanaka, Yasushi Sugiyama
  • Liquid-crystalline medium
    Patent number: 6962733
    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 formula I in which R1, L1 and L2 are as defined in claim 1.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: November 8, 2005
    Assignee: Merck Patent GmbH
    Inventors: Michael Heckmeier, Brigitte Schuler, Izumi Saito, Volker Reiffenrath, Georg Luessem, Christian Hock
  • Liquid crystal phase
    Patent number: RE37270
    Abstract: Liquid crystal phases containing components of the formulae I and III have an acceptable combination of threshold steepness, viewing angle and temperature dependence at a low threshold voltage.
    Type: Grant
    Filed: December 5, 1991
    Date of Patent: July 10, 2001
    Assignee: Merck Patent Gesellschaft
    Inventors: Ian Charles Sage, Michael Kevin Chambers, Reinhard Hittich, Georg Weber