Patents by Inventor Sandrine Lamarque

Sandrine Lamarque 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
  • Method for producing a liquid crystal device with low zenithal anchoring energy, and resulting device
    Patent number: 7087270
    Abstract: A method of making nematic liquid crystal devices where low energy zenith anchoring of the liquid crystal is obtained over confinement plates. A polymer or copolymer is deposited based on PVC onto a substrate. The polymer deposit is stabilized. An azimuth orientation is defined for the deposit to induce controlled azimuth anchoring of the liquid crystal.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: August 8, 2006
    Assignee: Nemoptic
    Inventors: Sandrine Lamarque-Forget, Julien Roux, Ivan N. Dozov, Philippe R. Martinot-Lagarde
  • Method of producing nematic liquid-crystal devices
    Patent number: 7067180
    Abstract: Method of producing nematic liquid-crystal devices, wherein a low zenithal anchoring energy of the liquid crystal is obtained on at least one of its confinement plates by the steps consisting in: depositing, on a substrate, a polymer or a copolymer or a terpolymer chosen from the polymers or copolymers derived from those of the poly(vinyl chloride-co-vinyl alkyl ether) type or from those of the poly(vinyl chloride-co-vinyl aryl ether) type; stabilizing this polymer coating; and defining an azimuthal orientation of the coating for inducing a controlled azimuthal anchoring of the liquid crystal.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: June 27, 2006
    Assignee: Nemoptic
    Inventors: Sandrine Lamarque-Forget, Sebastien Jacquier, Ivan Dozov, Luc Faget
  • 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
  • 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
  • Method of producing nematic liquid-crystal devices
    Publication number: 20030232154
    Abstract: Method of producing nematic liquid-crystal devices, wherein a low zenithal anchoring energy of the liquid crystal is obtained on at least one of its confinement plates by the steps consisting in:
    Type: Application
    Filed: June 4, 2003
    Publication date: December 18, 2003
    Inventors: Sandrine Lamarque-Forget, Sebastien Jacquier, Ivan Dozov, Luc Faget
  • Method for producing an improved liquid cystal device, and resulting device
    Publication number: 20030112396
    Abstract: The present invention relates to a method of making nematic liquid crystal devices, characterized by the fact that low energy zenith anchoring of the liquid crystal is obtained over at least one of the confinement plates by the steps consisting in:
    Type: Application
    Filed: November 18, 2002
    Publication date: June 19, 2003
    Inventors: Sandrine Lamarque-Forget, Julien Roux, Ivan N. Dozov, Philippe R. Martinot-Lagarde