Patent ID: 6699407
Filing Date: 2004-03-02
Classification: C09K,G02F,G03F,G03H,Y10T

Abstract:
A method for preparing an electrically switchable reflection hologram, comprising:disposing a polymer-dispersed liquid crystal material between transparent plates, wherein the polymer-dispersed liquid crystal material comprising, before exposure: (a) a polymerizable; (b) a liquid crystal; (c) a cross-linking monomer; (d) a coinitiator; and (e) a photoinitiator dye; disposing the polymer-dispersed liquid crystal material within a magnetic field wherein the orientation of at least a portion of the magnetic field is directed along an axis substantially parallel to the plane of the plates; and exposing an interference pattern inside the polymer-dispersed liquid crystal material while the polymer-dispersed liquid crystal material is disposed within the magnetic field.