Pointing device by sensing geomagnetic field
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United States of America Patent
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-
Sep 7, 2004
Grant Date -
Mar 13, 2003
app pub date -
Jul 17, 2002
filing date -
Sep 12, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pointing device of a computer includes a sensing module and a button. The sensing module has two magnetism detectors, each detector having a unique sensing axis. The magnetism detectors generate signals according to the relative changes of the sensing axes with respect to the geomagnetic field. The sensing signals and button signal are processed and transmitted to the computer for use in controlling the function of the computer.
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