METHOD FOR ASSOCIATING A PEN SHAPED HAND HELD INSTRUMENT WITH A SUBSTRATE AND/OR FOR DETECTING A SWITCHING OF THE SUBSTRATE AND PEN SHAPED HANDHELD INSTRUMENT

摘要

The invention relates to a method for associating a pen shaped hand held instrument with a substrate and/or for detecting a switching of the substrate, wherein the hand held instrument, includes at least one pen tip which generates a marking, a shaft, and at least one optical sensor which detects at least a coarse pattern from an identification position in which the pen tip has a distance from the substrate, wherein the at least one optical sensor detects at least the coarse pattern at least in an identification area which includes a portion of the substrate and at least a lateral edge of the substrate and/or at least a portion of a surrounding area of the substrate which surrounding area is directly adjacent to all edges of the substrate. The invention also relates to a pen shaped hand held instrument including at least one pen tip.