Coordinate input device

Details Coordinate input device Coordinate input device

1985-11-14

1988-06-21

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

178 20, G08C 2100

Patent

active

047526556

ABSTRACT:
A transparent coordinate input device can be used integrally with a display unit or overlap it and has a coordinate input panel (i.e., a transparent drawing pad). The input panel has a transparent insulating substrate, a flat transparent resistor film of a rectangular shape which is formed on the substrate, and detection electrodes, electrically connected to four sides of the transparent resistor film, for causing a current to flow along one of current flow-in and flow-out directions with respect to the transparent resistor film. The transparent coordinate input device also has a coordinate correction table for storing correction data representing the relationship between the input coordinate signals representing an input position of the electrical pen and the output coordinate signals representing a position and detected by a detector, and an operation circuit for performing coordinate correction by accessing the coordinate correction table.

REFERENCES:
patent: 3699439 (1972-10-01), Turner
patent: 4448837 (1984-05-01), Ikeda et al.
patent: 4644101 (1987-02-01), Jin et al.

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