Method of and apparatus for touch-input computer and related display employing touch force location external to the display
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United States of America Patent
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-
Dec 27, 1994
Issued Date -
N/A
app pub date -
Apr 22, 1994
filing date -
Mar 25, 1992
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method of and apparatus for determination of touch location on a display screen or the like or other surface embodying a force-sensing platform or surface supporting or otherwise externally contacting the display screen monitor apparatus, and responding to the forces created by the thrust of touching a point of the display screen, to sense and calculate the location of the touching point. The underlying technique employs force-sensing means responsive to all six degrees of freedom of applied (touching) force and torque, achieving force location away from the plane of the sensors and in spite of tangential force components by calculating the point of least magnitude of the three-dimensional torque vector from among all points within the screen or surface, and outputting this point as an estimate of the intersection point of the screen or surface with the thrust line of the touching or other contact force.
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