Patent ID: 6211998
Filing Date: 2001-04-03
Classification: G02B,G09F

Abstract:
A method of addressing a sheet of a rotating element sheet material comprising:a) providing a sheet of rotating element sheet material comprising a substrate having two opposed surfaces, at least one rotatable element disposed in the substrate, the element comprising at least two portions, each portion having an associated optical modulation characteristic, the optical modulation characteristic of at least one portion being different from the optical modulation characteristic of at least one other portion, wherein one portion is magnetized, and wherein the element has an anisotropy for providing an electrical dipole moment, the electrical dipole moment rendering the element electrically responsive such that when the rotating element is rotatably disposed in an electric field while the electrical dipole moment of the element is provided, the element tends to rotate to an orientation in which the electrical dipole moment aligns with the field, and additional magnetized means associated with the rotating element so constructed and arranged such that when the magnetized portion of the element is the portion of the element nearest the additional magnetized means a magnetic attractive force will exist between the additional magnetized means and the magnetized portion of the element,b) applying a magnetic field in the vicinity of the at least one rotatable element and the additional magnetized means to reduce the magnetic attractive force therebetween,c) applying an electric field in the vicinity of the at least one rotatable element to cause the at least one rotatable element to align with the electric field.