Apparatus for detecting X and Y coordinates of input points

Details Apparatus for detecting X and Y coordinates of input points Apparatus for detecting X and Y coordinates of input points

1980-03-11

1982-03-09

Robinson, Thomas A.

Telegraphy

Systems

Position coordinate determination for writing

340365A, G08C 2100

Patent

active

043190782

ABSTRACT:
The input surface of the apparatus for detecting X and Y coordinates of the input points comprises a first parallel electrode group, a second flexible parallel electrode group opposing and intersecting the first parallel electrode group. A pressure conductive rubber sheet which becomes conductive when the pressure is applied to the input surface is interposed between the two electrode groups. First and second resistors are provided which are in electrical contact with terminal ends of the two electrode groups. Electric signals from the first and second resistors are used to detect X and Y coordinates of input points on the input surface.

REFERENCES:
patent: 4013835 (1977-03-01), Eachus et al.
"Pressure Controlled Resistance Matrix", Einolf et al, IBM Technical Disclosure Bulletin, vol. No. 6, No. 3, Aug. 1963, pp. 4 and 5.

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