Gyricon is an electronic paper(e-paper) developed by Xerox back in the 1970s. The process is similar to that of e-ink and is based on tiny beads with a diameter of 50 µm to 100 µm, which are located between a double-sided plastic film.
The beads are two-colored, black on one side and white on the other, and can be rotated by electrical charges so that they can display the colors black and white, as well as shades of gray. The electrical charge is generated by voltage changes on the plastic sheets. The display is bistable, which means that the beads remain in their position until the electrical charge changes.
In the stable image display, a Gyricon display does not require any current. The display can be erased and the Gyricon can record new displays as often as required.