Force sensing touchpad
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United States of America Patent
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Dec 29, 1998
Grant Date -
N/A
app pub date -
Nov 6, 1996
filing date -
Nov 6, 1996
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A force sensing touchpad comprises a substantially rigid touch surface; a substantially rigid frame; a plurality of spring structures formed integrally with the touch surface and mechanically connected to the reference frame; and a circuit for deriving force information from capacitances proportional to the distances between predetermined portions of the touch surface and portions of the frame in response to a force applied to the touch surfaces.
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