Telegraphy – Systems – Position coordinate determination for writing
Patent
1994-05-23
1996-08-06
Chin, Stephen
Telegraphy
Systems
Position coordinate determination for writing
178 19, 178 20, 345173, 345174, 345175, 345179, G08C 2100, G09G 302
Patent
active
055435890
ABSTRACT:
Disclosed is a dual sensor comprising first and second touchpad sensors having different resolutions and being sandwiched to form a single sensor. Each of the touchpad sensors include a first plurality of electrically conductive strips positioned proximate to a second plurality of electrically conductive strips. The conductive strips in each plurality lie substantially in a single plane and the two pluralities are skewed relative to one-another in plan view. The conductive strips are separated by insulators that extend beyond the surface of the conductors to separate the conductors of one plurality from the conductors of the other plurality until a localized pressure is applied to a region of the pad. Two such touchpad sensors are sandwiched to form the dual sensor of the present invention. The two touchpad sensors are configured and positioned such that a single touch of a finger, stylus, or the like is capable of being detected by both sensors.
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Buchana William A.
Eardley Richard A.
Tizzard Anthony R.
Utley Brian G.
Chin Stephen
International Business Machines - Corporation
Magistrale Anthony N.
Shankar Vijay
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