Coordinate sensing device

Details Coordinate sensing device Coordinate sensing device

G - Physics

08

C

340/135.1

G08C 21/00 (2006.01) G06F 3/033 (2006.01)

Patent

CA 1182186

ABSTRACT OF THE DISCLOSURE A coordinate sensing device uses electric currents to energize a conducting member which has a major surface and preferably is made of a mesh material. Electrical currents are sequentially applied to create alternate non-coincident elec- trical fields so that when a probe is applied to the surface, the obtained electrical potentials can be compared to a reference potential. The resulting potential differences may then be conveniently converted to appropriate signals. The conducting member is not limited as to shape or construction; hence, it may also act as an anti-glare device for a cathode-ray tube. The fields created by the electrical currents need not be uniform.

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