Search Patents
  • 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
  • Additives for liquid crystal mixtures
    Patent number: 11359141
    Abstract: Polyfluorinated additives for use as components in liquid-crystal mixtures. Liquid-crystal mixtures which comprise these compounds. And liquid-crystal displays based on these liquid-crystal mixtures.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: June 14, 2022
    Assignee: MERCK PATENT GMBH
    Inventors: Peer Kirsch, Qiong Tong, Helga Haas, Kaja Christina Deing, Christoph Marten, Andreas Pohle, Reiner Friedrich
  • 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
  • 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
  • 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
  • Liquid-crystalline medium
    Patent number: 6861107
    Abstract: The present invention relates to a liquid-crystalline medium based on a mixture of compounds of negative dielectric anisotropy comprising one or more polymerizable compounds, and to the use thereof for electro-optical purposes, and to displays containing this medium.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: March 1, 2005
    Assignee: Merck Patent GmbH
    Inventors: Melanie Klasen-Memmer, Dagmar Klement, Matthias Bremer
  • Liquid-crystal display
    Patent number: 8114310
    Abstract: The present invention relates to a liquid-crystal (LC) display of the PSA (polymer sustained alignment) type, and to novel polymerisable compounds and novel LC media for use in PSA displays.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: February 14, 2012
    Assignee: Merck Patent GmbH
    Inventors: Georg Bernatz, Andreas Taugerbeck, Matthias Bremer, Achim Goetz
  • 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
  • Birefringent marking
    Patent number: 7033653
    Abstract: The invention relates to a birefringent marking comprising a liquid crystal material. The invention further relates to method of providing such a birefringent marking and to the use of the birefringent marking for decorative or security applications.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: April 25, 2006
    Assignee: Merck Patent GmbH
    Inventors: Matthias Kuntz, Robert Hammond-Smith, Rodney Riddle, John Patrick, Donald Graham
  • Anisotropic polymer film
    Patent number: 6953611
    Abstract: An anisotropic polymer film comprising a polymeriZed chiral liquid crystal material with helically twisted structure and having areas with different helical twist sense is useful for decorative or security applications.
    Type: Grant
    Filed: September 24, 2002
    Date of Patent: October 11, 2005
    Assignee: Merck Patent GmbH
    Inventors: Robert Hammond-Smith, John Patrick, Alison Linda May
  • Monomers, oligomers and polymers comprising thiophene and selenophene
    Patent number: 7470377
    Abstract: The invention relates to novel mono-, oligo- and polymeric compounds comprising thiophene and selenophene, to their use as semiconductors or charge transport materials, in optical, electro-optical or electronic devices, and to optical, electro-optical or electronic devices comprising the novel compounds.
    Type: Grant
    Filed: March 13, 2006
    Date of Patent: December 30, 2008
    Assignee: Merck Patent GmbH
    Inventors: Martin Heeney, Steven Tierney, Warren Duffy, Iain McCulloch
  • Liquid crystal medium containing polymerisable compounds
    Patent number: 10894918
    Abstract: The present invention relates to a liquid crystal (LC) medium comprising polymerisable compounds, to a process for its preparation, to its use for optical, electro-optical and electronic purposes, in particular in LC displays, and to LC displays comprising it.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: January 19, 2021
    Assignee: Merck Patent GmbH
    Inventors: Melanie Klasen-Memmer, Nils Greinert, Matthias Bremer, Konstantin Schneider, Christian Schoenefeld, Thomas Bauer
  • Device for regulating the passage of energy
    Patent number: 10114264
    Abstract: The present application relates to a device for regulating the passage of light through a light-transmitting area which comprises a switching layer comprising a liquid-crystalline medium comprising at least one dichroic dye, where the parameters degree of light transmission and degree of anisotropy of the device are selected in a certain manner.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: October 30, 2018
    Assignee: Merck Patent GmbH
    Inventors: Michael Junge, Andreas Beyer, Ursula Patwal
  • 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
  • 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
  • Polymerisable mixtures and the use thereof in liquid crystal displays
    Patent number: 9556382
    Abstract: The present invention relates to polymerizable 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: Grant
    Filed: June 30, 2011
    Date of Patent: January 31, 2017
    Assignee: Merck Patent GmbH
    Inventors: Achim Goetz, Sven Christian Laut, Andreas Taugerbeck
  • Liquid crystalline medium
    Patent number: 10723948
    Abstract: The invention relates to dielectrically positive liquid crystalline media comprising a compound of formula I wherein the parameters have the meaning given in claim 1 and to liquid crystal displays comprising these media, especially to active matrix displays and in particular to TN and IPS mode displays.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: July 28, 2020
    Assignee: MERCK PATENT GMBH
    Inventors: Harald Hirschmann, Martina Windhorst, Christian Hock, Andreas Pohle, Axel Jansen
  • Optical film inside a liquid crystal display
    Patent number: 7582227
    Abstract: The invention relates to an optical film for use in a liquid crystal display that is positioned inside the liquid crystal cell of the display comprising the switchable liquid crystal material, and to an LCD comprising such a film.
    Type: Grant
    Filed: March 8, 2004
    Date of Patent: September 1, 2009
    Assignee: Merck Patent GmbH
    Inventors: Mark Verall, Andrew Ann Cumming, Richard Harding, Owain Llyrr Parri
  • 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 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