Search Patents
  • Birefringent layer with negative optical dispersion
    Patent number: 8119026
    Abstract: The invention relates to a birefringent layer having negative optical dispersion, a liquid crystal (LC) medium for its preparation, and the use of the birefringent layer and the LC media in optical, electrooptical, electronic, semiconducting or luminescent components or devices.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: February 21, 2012
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Owain Llyr Parri, Kevin Adlem, Karl Skjonnemand, David Wilkes
  • Photoisomerizable compounds
    Patent number: 6849203
    Abstract: The invention relates to photoisomerizable compounds of formula I wherein A, Z, L, R, R1, k, m and r are defined herein.
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: February 1, 2005
    Assignee: Merck Patent Gesellschaft Mit Beschraenkter Haftung
    Inventors: Louise Diane Farrand, Christopher Worrall, Owain Llyr Parri
  • Liquid-crystalline medium and high-frequency components comprising same
    Patent number: 11208594
    Abstract: Liquid-crystalline media comprising one or more compounds of formula G and one or more compounds selected from the group of compounds of formulae I, II and III, in which the parameters have the meaning indicated in claim 1, and components comprising these media, are suitable for use in high-frequency technology, in particular, in phase shifters and microwave array antennas.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: December 28, 2021
    Assignee: Merck Patent GmbH
    Inventors: Michael Wittek, Constanze Brocke, Volker Reiffenrath
  • Thiophene derivatives, and LC media containing same
    Patent number: 8394293
    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: March 30, 2009
    Date of Patent: March 12, 2013
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Axel Jansen, Detlef Pauluth, Harald Hirschmann, Markus Czanta
  • POLYMERISABLE COMPOUNDS AND THE USE THEREOF IN LIQUID-CRYSTAL DISPLAYS
    Publication number: 20140139786
    Abstract: The present invention relates to polymerisable compounds, to processes and intermediates for the preparation thereof, to liquid-crystal (LC) media comprising them, and to the use of the polymerisable compounds and LC media for optical, electro-optical and electronic purposes, in particular in LC displays, especially in LC displays of the PSA (“polymer sustained alignment”) type.
    Type: Application
    Filed: April 12, 2013
    Publication date: May 22, 2014
    Applicant: Merck Patent GmbH
    Inventors: Martin ENGEL, Andreas TAUGERBECK, Constanze BROCKE, Helmut HAENSEL, Stephan DEROW, Julian VOGT
  • Liquid-crystal medium
    Patent number: 8715527
    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 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: Grant
    Filed: December 23, 2008
    Date of Patent: May 6, 2014
    Assignee: Merck Patent GmbH
    Inventors: Georg Luessem, Christian Hock, Brigitte Schuler, Eike Poetsch
  • Reactive mesogens
    Patent number: 10048420
    Abstract: The invention relates to reactive mesogens (RMs) comprising a terphenyl group, to mixtures and formulations comprising them, to polymers obtained form such RMs and RM mixtures, and the use of the RMs, RM mixtures and polymers in optical or electrooptical components or devices, like optical retardation films for liquid crystal displays (LCDs).
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: August 14, 2018
    Assignee: MERCK PATENT GMBH
    Inventors: Kevin Adlem, Owain Llyr Parri, Graham Smith, Patricia Eileen Saxton, Mariam Namutebi, Vicki Cook, Joseph Sargent
  • Liquid-crystalline compounds and liquid-crystalline media
    Patent number: 8551359
    Abstract: The present invention relates to liquid-crystalline compounds having two fluorinated biphenyl units, a terminal trifluoromethyl or trifluoromethoxy group and a —CF2O— bridge between the two fluorinated biphenyl units. The invention also relates to liquid-crystalline media prepared therewith and to liquid-crystal display devices (LC displays) containing these media.
    Type: Grant
    Filed: April 14, 2011
    Date of Patent: October 8, 2013
    Assignee: Merck Patent GmbH
    Inventors: Axel Jansen, Helmut Haensel, Malgorzata Rillich
  • Method of preparing an anisotropic polymer film on a substrate with a structured surface
    Patent number: 7083834
    Abstract: An anisotropic polymer film with improved alignments prepared by coating onto a substrate with a structured surface. The polymer films thereby obtained are useful in optical and electrooptical devices for decorative and security applications.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: August 1, 2006
    Assignee: Merck Patent GmbH
    Inventors: Matthias Kuntz, John Patrick, Guy Gregory, Tony Bleasdale, Rodney Riddle, Robert Hammond-Smith, Peter Howarth, Allan Marshall
  • Polymerizable liquid crystal material
    Publication number: 20030085377
    Abstract: The invention relates to a polymerizable liquid crystal material containing at least one polymerizable surface-active compound, its use for the preparation of anisotropic polymer films, and the use of the liquid crystal material and the polymer films in optical and electrooptical devices, and for decorative and security applications.
    Type: Application
    Filed: May 1, 2002
    Publication date: May 8, 2003
    Applicant: MERCK PAPTENTGESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Christopher J. Dunn, Simon Greenfield, Richard Harding, Ian Victor Edward Hassall, Alison Linda May, Julian Frederick Samuel Vaughan-Spickers
  • Liquid-crystal compounds and LC media
    Patent number: 8273264
    Abstract: Disclosed are novel liquid-crystal compounds, processes and intermediates for the preparation thereof, 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 containing the same.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: September 25, 2012
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Axel Jansen, Detlef Pauluth, Bernd Fiebranz, Bernhard Rieger
  • Liquid-crystalline medium
    Patent number: 9822302
    Abstract: The compounds of the formula I, and a liquid-crystalline medium, preferably having a nematic phase and negative dielectric anisotropy, which comprises a) one or more compounds of the formula I and b) one or more compounds of the formulae II-1 to II-4, in which the parameters have the meanings defined herein, are suitable for use in an electro-optical display, particularly in an active-matrix display based on the VA, ECB, PALC, FFS or IPS effect.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: November 21, 2017
    Assignee: Merck Patent GmbH
    Inventors: Martin Engel, Thorsten Kodek, Ingo Almeroth, Rocco Fortte
  • Fluorene derivatives
    Patent number: 8323527
    Abstract: The invention relates to novel fluorene derivatives, which are especially suitable for use in birefringent films with negative optical dispersion, to novel liquid crystal (LC) formulations and polymer films comprising them, and to the use of the fluorene derivatives, formulations and films in optical, electrooptical, electronic, semiconducting or luminescent components or devices.
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: December 4, 2012
    Assignee: Merck Patent GmbH
    Inventors: Kevin Adlem, Owain Llyr Parri, Karl Skjonnemand, David Wilkes
  • Cholesteric flakes
    Patent number: 6207770
    Abstract: The invention relates to cholesteric polymer flakes obtainable from a chiral polymerizable mesogenic material, to methods of manufacturing such cholesteric flakes, to the use of certain chiral and achiral polymerizable compounds with one or more terminal polymerizable groups for the manufacturing of such flakes and to the use of such cholesteric flakes as effect pigments in spraying or printing inks or paints or colored plastics for different applications, especially for automotive use, cosmetic products and security applications.
    Type: Grant
    Filed: August 14, 1998
    Date of Patent: March 27, 2001
    Assignee: Merck Patent GmbH
    Inventors: David Coates, Mark Goulding, Alison May
  • Liquid crystalline medium
    Patent number: 8524117
    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 the formula I and at least one compound of the formula II in which R1, R2, R3, R4, ring A, Z1, Z2 and m are as defined in Claim 1, and to the use thereof for an active-matrix display based on the ECB, VA, PS-VA, FFS, PALO or IPS effect.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: September 3, 2013
    Assignee: Merck Patent GmbH
    Inventors: Norihiko Tanaka, Makoto Murakami, Shinji Nakajima
  • Polymerisable liquid crystal material
    Patent number: 7597942
    Abstract: The invention relates to a polymerisable liquid crystal (LC) material, to optically biaxial films prepared thereof, to novel polymerisable compounds used therein and to the use of the material and films in optical devices like compensators and LC displays (LCDs).
    Type: Grant
    Filed: August 10, 2005
    Date of Patent: October 6, 2009
    Assignee: Merck Patent GmbH
    Inventors: Alison Linda May, Peter (Fangyun) Hsu, Tara Perrett, Ashley Nathan Smith, Owain Llyr Parri
  • Liquid-crystalline phenol esters
    Patent number: 7179511
    Abstract: The invention relates to liquid-crystalline phenol esters of the formula I in which R, A1, Z1, m, L and Y are as defined in Claim 1, to liquid-crystalline media comprising at least one phenol ester of the formula I, and to electro-optical displays containing such a liquid-crystalline medium.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: February 20, 2007
    Assignee: Merck Patent GmbH
    Inventors: Volker Reiffenrath, Michael Heckmeier, Eike Poetsch, Joachim Krause, Werner Binder, Brigitte Schuler, Achim Götz
  • Liquid-crystalline medium and liquid-crystal display
    Patent number: 8617419
    Abstract: The present invention relates to dielectrically positive, preferably nematic, media comprising one or more polymerisable compounds of formula I in which the parameters have the meaning given in the text, to polymer-stabilized media obtained therefrom, to the use thereof in liquid-crystal displays, and to these displays, in particular PSA-IPS, PSA-FFS and PSA-positive VA displays.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: December 31, 2013
    Assignee: Merck Patent GmbH
    Inventors: Sayuri Ohgiri, Masahiko Okamura, Yasushi Sugiyama, Hideo Ichinose
  • Compounds for a liquid crystalline medium and use thereof for high frequency components
    Patent number: 9175219
    Abstract: The present invention relates to compounds containing at least three ring systems, at least one of which is a 2,6-naphthylene group, and two unsaturated bridging groups between the ring systems, and to the use of the compounds for high-frequency components, in particular antennae, especially for the gigahertz region. The liquid-crystalline media comprising these compounds serve, for example, for the phase shifting of microwaves for tuneable ‘phased-array’ antennae.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: November 3, 2015
    Assignee: Merck Patent GmbH
    Inventors: Christian Jasper, Elvira Montenegro, Detlef Pauluth, Volker Reiffenrath, Atsutaka Manabe
  • Chiral reactive mesogen mixture
    Patent number: 8021571
    Abstract: The invention relates to chiral reactive mesogen (RM) mixtures, polymer films obtained thereof, and the use of the mixtures and polymer films in optical, electrooptical or electronic components or devices, in decorative, security or cosmetic applications, especially for use in broadband reflective polarizers.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: September 20, 2011
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Alison Linda May, Owain Llyr Parri