Patents by Inventor Abhishek K. SRIVASTAVA

Abhishek K. SRIVASTAVA 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).

  • Standing helix ferroelectric liquid crystal display cell
    Patent number: 10451948
    Abstract: A standing helix ferroelectric liquid crystal display cell includes: two transparent substrates (102A, 102B); a ferroelectric liquid crystal layer (104) comprising ferroelectric liquid crystals in a standing helix configuration, the ferroelectric liquid crystal layer (104) being disposed between the two transparent substrates (102A, 102B), the ferroelectric liquid crystals having a helix axis perpendicular to the two substrates (102A, 102B) and chiral smectic liquid crystal helix pitch shorter than a wavelength of a polarized light normally impinging at least one of the two transparent substrates (102A, 102B); and inter-digital electrodes (105), disposed in plane with the two transparent substrates (102A, 102B), configured to apply an electric field to the ferroelectric liquid crystal layer (104) that provides a driving voltage below a critical voltage for helix unwinding.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: October 22, 2019
    Assignee: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Evgenii P. Pozhidaev, Alexei D. Kiselev, Abhishek K. Srivastava, Vladimir G. Chigrinov, Hoi Sing Kwok
  • STANDING HELIX FERROELECTRIC LIQUID CRYSTAL DISPLAY CELL
    Publication number: 20180017833
    Abstract: A standing helix ferroelectric liquid crystal display cell includes: two transparent substrates (102A, 102B); a ferroelectric liquid crystal layer (104) comprising ferroelectric liquid crystals in a standing helix configuration, the ferroelectric liquid crystal layer (104) being disposed between the two transparent substrates (102A, 102B), the ferroelectric liquid crystals having a helix axis perpendicular to the two substrates (102A, 102B) and chiral smectic liquid crystal helix pitch shorter than a wavelength of a polarized light normally impinging at least one of the two transparent substrates (102A, 102B); and inter-digital electrodes (105), disposed in plane with the two transparent substrates (102A, 102B), configured to apply an electric field to the ferroelectric liquid crystal layer (104) that provides a driving voltage below a critical voltage for helix unwinding.
    Type: Application
    Filed: January 20, 2016
    Publication date: January 18, 2018
    Inventors: Evgenii P. POZHIDAEV, Alexei D. KISELEV, Abhishek K. SRIVASTAVA, Vladimir G. CHIGRINOV, Hoi Sing KWOK