Patents Represented by Attorney H. M. Chamin
  • Patent number: 4009934
    Abstract: An electro-optic display is provided which uses a liquid crystalline composition (a) having a positive, zero frequency dielectric anisotropy and (b) exhibiting a dielectric anisotropy inversion with increasing frequency of an applied field. Such a composition is subjected to an electric field of a first audio frequency and then subjected to a field of a second audio frequency of a magnitude sufficient to produce a dielectric anisotropy inversion in said composition. The resultant anisotropy changes allow the molecular orientation of the composition to be altered by the applied field thereby changing the optical properties of the composition.
    Type: Grant
    Filed: June 28, 1974
    Date of Patent: March 1, 1977
    Assignee: Eastman Kodak Company
    Inventors: Robert M. Goodwin, Richard T. Klingbiel, Hermann K. Bucher