Patents by Inventor Tatiana A. Sergan

Tatiana A. Sergan 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).

  • Photo-patterned pre-tilt liquid crystal cells, lenses and methods
    Patent number: 8654281
    Abstract: Liquid crystal cells and lenses having a variable resulting pre-tilt across two or more areas of the cell, and in particular, cells and lenses are provided wherein a resulting pre-tilt is varied across the cell according to any desired birefringence profile that can be utilized in liquid crystalline optical elements and liquid crystal displays. Methods of fabrication of the liquid crystal cells with variable resulting pre-tilt are disclosed.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: February 18, 2014
    Assignees: California State University, Sacramento, Kent State University
    Inventors: Philip Bos, Vassili V. Sergan, Tatiana A. Sergan
  • Photo-patterned pre-tilt liquid crystal cells, lenses and methods
    Publication number: 20110170039
    Abstract: Liquid crystal cells and lenses having a variable resulting pre-tilt across two or more areas of the cell, and in particular, cells and lenses are provided wherein a resulting pre-tilt is varied across the cell according to any desired birefringence profile that can be utilized in liquid crystalline optical elements and liquid crystal displays. Methods of fabrication of the liquid crystal cells with variable resulting pre-tilt are disclosed.
    Type: Application
    Filed: September 2, 2010
    Publication date: July 14, 2011
    Applicants: Kent State University, California State University
    Inventors: Philip Bos, Vassili V. Sergan, Tatiana A. Sergan
  • Elliptically polarizing plate and liquid crystal display
    Patent number: 6839103
    Abstract: An elliptically polarizing plate, comprising a polarizer, a first optical anisotropic layer having positive refractive index anisotropy and an optical axis of the anisotropy that is tilted, and a second optical anisotropic layer having negative refractive index anisotropy and an optical axis that is tilted, have accurate retardation compensation of a liquid crystal cell, and the liquid crystal display maintains a display contrast having a sufficient visibility when the viewing angle is changed and which does not generate colorization.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: January 4, 2005
    Assignee: Kent State University
    Inventors: Jack Kelly, Tatiana Sergan, Marina Lavrentovich, Yuuichi Nishikouji, Tadayuki Kameyama
  • Optical compensation film for liquid crystal display
    Patent number: 6822713
    Abstract: An optical compensation film for a liquid crystal display is provided wherein the film is a polymer that is capable of producing light induced anisotropy. The film is irradiated with light to form an optical axis or axes.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: November 23, 2004
    Assignee: Kent State University
    Inventors: Oleg Yaroshchuk, Yuriy Reznikov, Jack R. Kelly, Liang-Chy Chien, Tatiana Sergan
  • Elliptically polarizing plate and liquid crystal display
    Publication number: 20030164920
    Abstract: An elliptically polarizing plate, comprising a polarizer, a first optical anisotropic layer having positive refractive index anisotropy and an optical axis of the anisotropy that is tilted, and a second optical anisotropic layer having negative refractive index anisotropy and an optical axis that is tilted, have accurate retardation compensation of a liquid crystal cell, and the liquid crystal display maintains a display contrast having a sufficient visibility when the viewing angle is changed and which does not generate colorization.
    Type: Application
    Filed: February 28, 2002
    Publication date: September 4, 2003
    Inventors: Jack Kelly, Tatiana Sergan, Marina Lavrentovich, Yuuichi Nishikouji, Tadayuki Kameyama