Patents Assigned to Electronic Display Systems, Inc.
  • Class of dichroic dyes for use with liquid crystals
    Patent number: 4401369
    Abstract: A cholesteric guest-host liquid crystal composition having a positive dielectric anisotropy and consisting of a positive nematic host component, an optically active cholesteric component, and a tetra-azo dichroic dye guest component having a dichroic ratio of at least 0.72.
    Type: Grant
    Filed: October 19, 1981
    Date of Patent: August 30, 1983
    Assignee: Electronic Display Systems, Inc.
    Inventor: Derick Jones