Patent ID: 7041233

Claim:
A method of generating a 3-dimensional effect comprising: providing at least one first image layer of a chiral liquid crystal material, and at least one second image layer of a chiral liquid crystal material, wherein one of said first and second image layers reflects right-handed circularly polarised light and the other reflects left-handed circularly polarised light, and wherein (a) said first and second image layers each comprise polymerised or crosslinked cholesteric liquid crystal material and are obtained by providing a polymerisable chiral liquid crystal material on a substrate, aligning said material into planar orientation and polymerising said material in its liquid crystal state at a temperature below 60° C., or (b) said first and second image layers are not directly superimposed onto each other and do not form a stereo pair of images, or (c) said first and second image layers each comprise polymerised or crosslinked cholesteric liciuid crystal material and are obtained by providing a polymerisable chiral liquid crystal material on a substrate, aligning said material into planar orientation and polymerising said material in its liciuid crystal state at a temperature below 60° C., and said first and second image layers are not directly superimposed onto each other and do not form a stereo pair of images.