Optically anisotropic film and method for making
AssigneeNitto Denko Corporation
InventorYuri A. Bobrov
Life of this patent
Estimating the term…
Abstract
Anisotropic film could be used for manufacturing devices of various purposes including information liquid crystal displays, illuminating equipment, decorative products, for manufacturing trademarks and service signs, etc. Essence of the invention: optically anisotropic film is obtained of molecularly oriented organic having varying direction of optical axis (axes) throughout its thickness on at least a fraction of the film's thickness, for at least one region of the spectrum and on at least a part of the area of the film. The present invention relates to a method of obtaining of the film.
Claims21
An optically anisotropic film comprising:
- a substrate and a molecularly oriented organic material formed on the substrate,
- wherein said substrate has at least a part having a surface anisotropy,
- wherein said organic material is formed of a lyotropic liquid-crystal comprising at least one organic dye, said organic dye having a structural formula comprising at least one ionogenic group, said at least one ionogenic group providing solubility in polar solvents, and said lyotropic liquid-crystal is aligned to a direction which does not coincide with a direction defined by said surface anisotropy and
- wherein at least one optical axis of said film varies throughout the thickness direction of said film on at least a fraction of the thickness of said film and on at least a part of the surface of said film.
Dependencies are inferred from the claim text.