Patent ID: 7671834

Claim:
An electric writable media system comprising: a stylus having a curved tip, wherein the curved tip is generally hemispherical in shape and the lowermost point of the tip is curved; a writeable media comprising multichromal twistable or rotatable elements positioned in association with a plurality of conductive islands, the conductive islands being located along at least one surface of the electric writable media and separated from each other by an insulating substrate; wherein the spacing of the conductive islands and the size and configuration of the conductive islands and the curved tip of the stylus are such that the curved tip of the stylus when in contact with the conductive islands is precluded from contacting the insulating substrate and is maintained spaced apart therefrom to avoid tribocharging of the electric writable media when the multichromal elements are twisted or rotated by the charged stylus when it is moved over the electric writable media, wherein the thickness of each conductive island is greater than half of the distance between neighboring conductive islands squared divided by two times the radius of curvature of the tip of the stylus.