Telegraphy – Systems – Position coordinate determination for writing
Patent
1987-03-03
1988-07-19
Schreyer, Stafford D.
Telegraphy
Systems
Position coordinate determination for writing
G08C 2100
Patent
active
047586907
ABSTRACT:
A coordinate detecting method, adapted to a coordinate input device comprising an input plane having a plurality of parallel embedded loops, establishes a plurality of coarse regions while taking as a reference the polarity reversing positions of a magnetic field detected when these loops are scanned in sequence. The method comprises the steps of specifying one coarse region to be interpolated, interpolating the designation position of a coordinate designating member within the specified coarse region, and calculating the coordinate of the designation position on the basis of the coordinate position of the specified coarse region and an interpolation value obtained in the interpolating step.
REFERENCES:
patent: 4616107 (1986-10-01), Abe et al.
Alps Electric Co. ,Ltd.
Chong Leighton K.
Ostrager Glenn
Schreyer Stafford D.
Shoup Guy W.
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