Patents by Inventor Suman MANNA

Suman MANNA 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).

  • Reflecting cell with modulable reflectivity
    Patent number: 10705400
    Abstract: A reflecting cell including at least two substrates each covered by an electrode and facing each other, the substrates delimitating between them a volume which separates them and which is filled with a bistable liquid crystal-type material with a threshold field, for example a cholesteric liquid crystal, both electrodes being intended to be connected to a voltage source. This cell is characterized in that at least one of the electrodes is formed by associating a pattern, which does not entirely cover the surface of the substrate considered, and a conducting layer which covers the surface of the substrate considered, the conductivity of the material of the layer being lower than that of the material of the pattern.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: July 7, 2020
    Assignees: NEXTER SYSTEMS, INSTITUT MINES TELECOM-IMT ATLANTIQUE-BRETAGNE-PAYS DE LA LOIRE
    Inventors: Laurent Dupont, Suman Manna
  • Cholesteric liquid crystal cell with increased reflectivity
    Patent number: 10191347
    Abstract: The invention relates to a reflecting cell including at least two substrates covered by an electrode and facing each other, the substrates delimiting between them a volume which separates them and which is filled with a cholesteric liquid crystal-type material, both electrodes being intended to be connected to a voltage source. This cell includes at least one half-wave plate arranged between both substrates and dividing the volume into two compartments, each enclosing a part of a same cholesteric liquid crystal.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: January 29, 2019
    Assignees: NEXTER SYSTEMS, INSTITUT MINES TELECOM—TELECOM BRETAGNE
    Inventors: Laurent Dupont, Suman Manna
  • CHOLESTERIC LIQUID CRYSTAL CELL WITH INCREASED REFLECTIVITY
    Publication number: 20170315398
    Abstract: The invention relates to a reflecting cell including at least two substrates covered by an electrode and facing each other, the substrates delimiting between them a volume which separates them and which is filled with a cholesteric liquid crystal-type material, both electrodes being intended to be connected to a voltage source. This cell includes at least one half-wave plate arranged between both substrates and dividing the volume into two compartments, each enclosing a part of a same cholesteric liquid crystal.
    Type: Application
    Filed: October 28, 2015
    Publication date: November 2, 2017
    Applicants: NEXTER SYSTEMS, INSTITUT MINES TELECOM - IMT ATLANTIQUE - BRETAGNE - PAYS DE LA LOIRE
    Inventors: Laurent DUPONT, Suman MANNA
  • REFLECTING CELL WITH MODULABLE REFLECTIVITY
    Publication number: 20170307927
    Abstract: A reflecting cell including at least two substrates each covered by an electrode and facing each other, the substrates delimitating between them a volume which separates them and which is filled with a bistable liquid crystal-type material with a threshold field, for example a cholesteric liquid crystal, both electrodes being intended to be connected to a voltage source. This cell is characterized in that at least one of the electrodes is formed by associating a pattern, which does not entirely cover the surface of the substrate considered, and a conducting layer which covers the surface of the substrate considered, the conductivity of the material of the layer being lower than that of the material of the pattern.
    Type: Application
    Filed: October 22, 2015
    Publication date: October 26, 2017
    Applicants: NEXTER SYSTEMS, INSTITUT MINES TELECOM - IMT ATLANTIQUE - BRETAGNE - PAYS DE LA LOIRE
    Inventors: Laurent DUPONT, Suman MANNA