Patents by Inventor Didier Gallaire

Didier Gallaire 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).

  • METHOD FOR MAKING BISTABLE NEMATIC LIQUID-CRYSTAL DEVICES
    Publication number: 20120160393
    Abstract: The object of the invention is a method for making devices with bistable nematic liquid crystals, having a nematic liquid crystal layer placed between two plates, each plate including a strip, an electrode and an alignment layer for nematic liquid crystal, at least one of said alignment layers having low zenithal anchoring for said liquid crystal, small pre-tilt and medium or strong azimuthal anchoring, wherein said at least one of the alignment layers is prepared by depositing a solution comprising a polymer, said polymer is a copolymer or a terpolymer derived from vinyl chloride and vinyl ethers, said solution further comprising an additive, selected from the group formed by aromatic polyimides, precursors of the aromatic polyamic acid type or a mixture of these compounds.
    Type: Application
    Filed: July 23, 2009
    Publication date: June 28, 2012
    Inventors: Sandrine Lamarque-Forget, Bertrand Pecout, Didier Gallaire
  • Nematic liquid crystal mixtures for use in bistable display devices
    Patent number: 7335405
    Abstract: A method of using a liquid crystal composition in a bistable liquid crystal device having a weak zenithal anchoring comprising at least 40% by weight of compounds with strong molecular polarisability and strong dipole moment.
    Type: Grant
    Filed: April 3, 2006
    Date of Patent: February 26, 2008
    Assignee: NEMOPTIC
    Inventors: Jean-Claude Dubois, Didier Gallaire, Stephane Joly, Ivan N. Dozov, Philippe Martinot-Lagarde, Daniel N. Stoenescu
  • Nematic liquid crystal mixtures for use in bistable display devices
    Publication number: 20060249708
    Abstract: A method of using a liquid crystal composition in a bistable liquid crystal device having a weak zenithal anchoring comprising at least 40% by weight of compounds with strong molecular polarisability and strong dipole moment.
    Type: Application
    Filed: April 3, 2006
    Publication date: November 9, 2006
    Inventors: Jean-Claude Dubois, Didier Gallaire, Stephane Joly, Ivan Dozov, Philippe Martinot-Lagarde, Daniel Stoenescu
  • Nematic liquid crystal mixtures for bistable display device
    Patent number: 7115307
    Abstract: Nematic liquid crystal mixtures with weak zenithal anchoring energy for bistable display devices, comprising at least 40% by weight of compounds with strong molecular polarisability and strong dipole moment.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: October 3, 2006
    Assignee: Nemoptic
    Inventors: Jean Claude Dubois, Didier Gallaire, Stéphane Joly, Ivan N Dozov, Philippe Martinot-Lagarde, Daniel N Stoenescu
  • Polyimides for anchoring liquid crystals, display devices including same and method for the preparation of said devices
    Patent number: 7022809
    Abstract: The present invention relates to novel polyimides derived from 6FDA and from 3,3-dihydroxy-4,4?-diaminobiphenyl and novel polyimides derived from PMDA and from Bis-AP-AF, having alkyl, arylalkyl, heteroarylalkyl, (cycloalkyl)alkyl, fluoroalkyl or siloxane side groups. The present invention also relates to a method of producing nematic liquid-crystal devices, which comprises the steps consisting in: depositing one of the polyimides according to the invention on a substrate; annealing the polyimide in one or more steps; and defining an azimuthal orientation of the polyimide coating.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: April 4, 2006
    Assignee: Nemoptic
    Inventors: Sandrine Lamarque, Jean-Claude Dubois, Didier Gallaire
  • Nematic liquid crystal mixtures for bistable display devices
    Publication number: 20040188654
    Abstract: Nematic liquid crystal mixtures with weak zenithal anchoring energy for bistable display devices, comprising at least 40% by weight of compounds with strong molecular polarisability and strong dipole moment.
    Type: Application
    Filed: February 25, 2004
    Publication date: September 30, 2004
    Inventors: Jean Claude Dubois, Didier Gallaire, Stephane Joly, Ivan N. Dozov, Philippe Martinot-Lagarde, Daniel N. Stoenescu
  • Polyimides for anchoring liquid crystals, display devices including same and method for the preparation of said devices
    Publication number: 20040161541
    Abstract: The present invention relates to novel polyimides derived from 6FDA and from 3,3-dihydroxy-4,4′-diaminobiphenyl and novel polyimides derived from PMDA and from Bis-AP-AF, having alkyl, arylalkyl, heteroarylalkyl, (cycloalkyl)alkyl, fluoroalkyl or siloxane side groups.
    Type: Application
    Filed: November 25, 2003
    Publication date: August 19, 2004
    Inventors: Sandrine Lamarque, Jean-Claude Dubois, Didier Gallaire