Multi-point touch pad
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United States of America Patent
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Feb 7, 2006
Grant Date -
May 8, 2003
app pub date -
Nov 8, 2001
filing date -
Nov 8, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A multi-point touch pad device having a base with a top surface that defines a plane. A support layer has a top surface and a bottom surface. The top surface of the support layer contains a plurality of strain gauges that are disposed on the top surface of the support layer in a matrix configuration. A touch layer is disposed on top of the strain gauge matrix; the touch layer is joined to the top of the strain gauge matrix. Sensor wires connect the strain gauges to a processor which is programmed with an algorithm to measure the location and pressure of simultaneous, multiple touches.
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