Patents by Inventor Axel Pausch

Axel Pausch has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Electro-optical liquid-crystal display
    Patent number: 6146720
    Abstract: The invention relates to an electro-optical liquid-crystal display having a realignment layer for realigning the liquid crystals whose field has a significant component parallel to the liquid-crystal layer and which contains a liquid-crystalline medium of positive dielectric anisotropy, where the medium comprises at least one mesogenic compound containing a 3,4,5-trifluorophenyl group and/or comprises at least one mesogenic compound [lacuna] a structural unit of the formula 2 ##STR1## in which A is O or CH,Z is --COO-- or a single bondL.sup.1 is F or, if A is O, is alternatively H, andL.sup.2 is H or F.
    Type: Grant
    Filed: October 5, 1999
    Date of Patent: November 14, 2000
    Assignee: Merck Patent Gesellschaft mit
    Inventors: Axel Pausch, Eike Poetsch, Kazuaki Tarumi, Anja Huth, Andreas Wachtler, Andreas Beyer, Brigitte Schuler, Volker Reiffenrath, Matthias Bremer, Michael Kompter
  • Electro-optical liquid-crystal display
    Patent number: 6027665
    Abstract: The invention relates to an electro-optical liquid-crystal display having a realignment layer for realigning the liquid crystals, where the field thereof has a significant component parallel to the liquid-crystal layer, comprising a liquid-crystalline medium having negative dielectric anisotropy, where the medium comprises at least one mesogenic compound which contains a group of the formula A ##STR1## and at least one compound which contains a group of the formula B ##STR2##
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: February 22, 2000
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Axel Pausch, Kazuaki Tarumi, Volker Reiffenrath
  • Electro-optical liquid crystal display
    Patent number: 5993691
    Abstract: The invention relates to an electro-optical liquid-crystal display having a realignment layer for realigning the liquid crystals whose field has a significant component parallel to the liquid-crystal layer and which contains a liquid-crystalline medium of positive dielectric anisotropy, where the medium comprises at least one mesogenic compound containing a 3,4,5-trifluorophenyl group and/or comprises at least one mesogenic compound [lacuna] a structural unit of the formula 2 ##STR1## in which A is O or CH,z is --COO-- or a single bondL.sup.1 is F or, if A is O, is alternatively H, andL.sup.2 is H or F.
    Type: Grant
    Filed: August 4, 1997
    Date of Patent: November 30, 1999
    Assignee: Merck Patent Gesellschaft MIT
    Inventors: Axel Pausch, Eike Poetsch, Kazuaki Tarumi, Anja Huth, Andreas Wachtler, Andreas Beyer, Brigitte Schuler, Volker Reiffenrath, Matthias Bremer, Michael Kompter
  • Supertwist liquid-crystal display
    Patent number: 5714087
    Abstract: The invention relates to improved STN displays of which the nematic liquid crystalline medium comprises compounds of formulae I1, I2, II1 and/or III1 ##STR1## wherein R.sup.3 and R.sup.4 are each independently alkyl with 1 to 8 C atoms, ##STR2## wherein R.sup.1 is alkyl or alkoxy with 1 to 8 C atoms, ##STR3## wherein R2 is oxaalkyl, alkenyl with up to 8 C atoms.
    Type: Grant
    Filed: February 12, 1996
    Date of Patent: February 3, 1998
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Axel Pausch, Akihiro Kojima, Matthias Bremer, Hideo Ichinose, Michael Junge, Hiroshi Numata, Volker Reiffenrath, Bernhard Rieger, Atsusi Sawada, Kazuaki Tarumi, Georg Weber
  • Ferroelectric liquid-crystalline media, and their use in electro-optical devices
    Patent number: 5387371
    Abstract: The invention relates to a ferroelectric liquid-crystalline medium having improved low-temperature behavior, pronounced bistability and a phase sequence containing the phases isotropic, cholesteric, smectic A and chiral smectic C, comprising an achiral base material having a broad smectic C phase and at least one chiral dope which induces a spontaneous polarization of from 5 to 40 nCcm.sup.-2 in the achiral base material, characterized in that the medium has a chiral smectic C phase which is stable at least to -30.degree. C., and to the use thereof in electro-optical devices.
    Type: Grant
    Filed: September 29, 1993
    Date of Patent: February 7, 1995
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Axel Pausch, Ulrich Finkenzeller, Juliane Suermann, David Coates
  • Ferroelectric liquid-crystal display
    Patent number: 5300254
    Abstract: The invention relates to ferroelectric liquid-crystal displays having improved multiplexing capability.
    Type: Grant
    Filed: July 26, 1991
    Date of Patent: April 5, 1994
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Thomas Geelhaar, Axel Pausch, Michael Kompter, Bernhard Scheuble
  • Smectic liquid-crystalline phases
    Patent number: 5055221
    Abstract: Compounds of the formula I,R.sup.1 --A.sup.1 --Z.sup.1 --A.sup.2 --[Z.sup.2 --A.sup.3 ].sub.m --R.sup.2 Iin which R.sup.1, R.sup.2, A.sup.1, A.sup.2, A.sup.3, Z.sup.1, Z.sup.2 and m have the meaning specified in patent claim 1, are suitable as components of smectic liquid-crystalline phases.
    Type: Grant
    Filed: June 5, 1989
    Date of Patent: October 8, 1991
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Bernhard Scheuble, Klaus Bofinger, Reinhard Hopf, Axel Pausch, Rudolf Eidenschink, Joachim Krause, Andreas Wachtler