Patent ID: 7334910

Claim:
A lighted display having a changing image comprising: a transparent container holding a stable suspension of plate-like particles in a liquid, the plate-like particles comprising delaminated sheets of vermiculite, means for imparting motion to the plate-like particles in the container, a light source positioned at a first surface of the container to deliver light to the first surface of the container, a second surface of the container and the liquid suspension within the container, the light being transmitted through the first surface, the liquid suspension and the second surface of the container, and a first and second polarizer film, the first polarizer film being located between the light source and the liquid suspension and the second polarizer film being located between the liquid suspension and the observer, said polarizer films being linear or circular polarizers, such that transmitted, polarized light passing through and modified by the plate-like particles in the suspension can be observed as an image generated by the display.