Universal pen with optical, position and/or motion sensors

Abstract

A pen for marking a visible path on a surface. The pen has a marking device adapted to change one or more attributes of the visible path, and a sensing device having at least one of a position sensor for determining the position of the pen relative to the surface, a motion sensor for sensing the motion of the pen relative to the surface, and an optical sensor for sensing colors and or images on a surface. A controller in the pen is linked to the sensing device and the marking device; such that the changes to the or each attribute are derived from at least one of he relative position, the relative motion, colors, and images, sensed by the sensing device

Dependencies are inferred from the claim text.