Tablet input apparatus

Details Tablet input apparatus Tablet input apparatus

1982-11-15

1985-01-08

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

G08C 2100

Patent

active

044928181

ABSTRACT:
A tablet input apparatus having a tablet formed with a segment including at least one lattice point on a matrix comprising a group of conductors arranged in spaced relation along coordinate axes, wherein an input pen is placed in contact with a desired segment to thereby output said segment as a coordinate data. In the tablet input apparatus, when a scanning pulse supplied to adjacent at least two conductors is detected by one-time contacting operation of the input pen, the coordinate data is discriminated by either scanning pulse or no discriminating operation is made therefor but processing is made to provide a non-detection zone.

REFERENCES:
patent: 3974332 (1976-08-01), Abe et al.

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