Tactile screen for determining the coordinates of a point on a s

Details Tactile screen for determining the coordinates of a point on a s Tactile screen for determining the coordinates of a point on a s

1987-01-16

1988-01-19

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

G08C 2100

Patent

active

047206071

ABSTRACT:
A tactile screen for determining the coordinates of a point on a surface is formed by a support of glass, for example, which carries relatively spaced conductive strips made up of emitting and receiving strips in interjacent relation. The screen is intended to be touched by an object such as a user's finger in order to establish an electrical bridge between an emitting strip and a receiving strip. The conductive strips are converted with a membrane for providing the conductive strips with mechanical and electrical protection, the surface of the membrane which is adjacent to the conductive strips being conductive. The electrical resistance per unit area of the conductive surface is distinctly higher than that of the conductive strips when the membrane is not touched.

REFERENCES:
patent: 3806912 (1974-04-01), Eckert
patent: 4571577 (1986-02-01), Taupin et al.
"A High-Resolution Imaging Touch Sensor", International Journal of Robotics Research, vol. 1, No. 2 (1982), by W. Daniel Hillis, pp. 33-44.

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