Method of detecting a coordinate

Details Method of detecting a coordinate Method of detecting a coordinate

1986-12-03

1988-11-29

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

G08C 2100

Patent

active

047883855

ABSTRACT:
A coordinate detection method for detecting a coordinate position by transmitting scanning signals in order to each of main loops composed of a plurality of conductors embedded in an input plane in parallel relation to each other, then by detecting as the interpolating region, a general region at which a coordinate pointer is pointed in the input plane, and thereafter by interpolating the position in the general region. In order to select a general region, absolute values of the detection voltage are compared between a loop at which the inversion of the polarity of the initial magnetic field is detected by the coordinate pointer and a loop a predetermined number behind the above loop in the scanning direction, to determine a general region to the interpolated.

REFERENCES:
patent: 3732369 (1973-05-01), Cotter
patent: 4582955 (1986-04-01), Blesser

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