Patents by Inventor Sergij V. Shiyanovsii

Sergij V. Shiyanovsii 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).

  • Field induced heliconical structure of cholesteric liquid crystal
    Patent number: 9690161
    Abstract: A diffraction grating comprises a liquid crystal (LC) cell configured to apply an electric field through a cholesteric LC material that induces the cholesteric LC material into a heliconical state with an oblique helicoid director. The applied electric field produces diffracted light from the cholesteric LC material within the visible, infrared or ultraviolet. The axis of the heliconical state is in the plane of the liquid crystal cell or perpendicular to the plane, depending on the application. A color tuning device operates with a similar heliconical state liquid crystal material but with the heliconical director axis oriented perpendicular to the plane of the cell. A power generator varies the strength of the applied electric field to adjust the wavelength of light reflected from the cholesteric liquid crystal material within the visible, infrared or ultraviolet.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: June 27, 2017
    Assignee: KENT STATE UNIVERSITY
    Inventors: Oleg D. Lavrentovich, Sergij V. Shiyanovsii, Jie Xiang, Young-Ki Kim
  • FIELD INDUCED HELICONICAL STRUCTURE OF CHOLESTERIC LIQUID CRYSTAL
    Publication number: 20160033806
    Abstract: A diffraction grating comprises a liquid crystal (LC) cell configured to apply an electric field through a cholesteric LC material that induces the cholesteric LC material into a heliconical state with an oblique helicoid director. The applied electric field produces diffracted light from the cholesteric LC material within the visible, infrared or ultraviolet. The axis of the heliconical state is in the plane of the liquid crystal cell or perpendicular to the plane, depending on the application. A color tuning device operates with a similar heliconical state liquid crystal material but with the heliconical director axis oriented perpendicular to the plane of the cell. A power generator varies the strength of the applied electric field to adjust the wavelength of light reflected from the cholesteric liquid crystal material within the visible, infrared or ultraviolet.
    Type: Application
    Filed: July 29, 2015
    Publication date: February 4, 2016
    Inventors: Oleg D. Lavrentovich, Sergij V. Shiyanovsii, Jie Xiang, Young-Ki Kim