Apple Inc.
Magnetic imaging

Abstract:

A magnetic image system for providing a visible image includes a magnetic substrate having a first and a second opposing surface and formed of material that is magnetized into a pattern of magnetized regions corresponding to the visible image, the magnetized regions forming a magnetic surface having a size and a shape in accordance with the visible image and a magnetic property corresponding to a visible image property, wherein the magnetic surface is rendered visible as the visible image using a magnetic imaging medium that interacts with the magnetic surface in accordance with the magnetic property.