Single-resistor-foil pressure sensitive coordinate input system

Details Single-resistor-foil pressure sensitive coordinate input system Single-resistor-foil pressure sensitive coordinate input system

1997-11-21

1999-12-28

Walberg, Teresa

Electrical resistors

Mechanically variable

Surfaces pressed together

178 1805, H01C 1010

Patent

active

060087188

ABSTRACT:
The present invention relates to a single-resistor-foil pressure sensitive coordinate input system, which comprises: a resistor foil surrounded by a frame, and a base with a copper plate covered by the resistor foil and an control circuit. The frame has four corners, which each have an electrode. The base has four corners, which respectively contact the electrodes of the four corners of the resistor foil and connect to the control circuit. The control circuit has transistors as electronic switches, and the copper plate has a terminal, which is connected to the electronic switches. When the resistor foil contacts the base and a voltage is applied on the resistor foil, by switching the electronic switches, a coordinate measurement is performed.

REFERENCES:
patent: 5451724 (1995-09-01), Nakazawa et al.
patent: 5668576 (1997-09-01), Ikura et al.

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