High accuracy digitizer system
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United States of America Patent
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Dec 29, 1998
Grant Date -
N/A
app pub date -
Sep 11, 1995
filing date -
Sep 11, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A high accuracy digitizer system for determining the position of a pointer relative to a tablet comprising a tablet having a positional grid thereon, a processor for determining the coarse position of the pointer relative to the tablet, and an error correction system for generating the true position of the pointer relative to the tablet. In a particular embodiment, the pointer includes an electromagnetic transducer for inducing a signal in the positional grid and the processor is coupled to the positional grid for sensing the signal and generating the coarse position of the pointer. The error correction system receives the coarse position from the processor and generates a true position, the positional grid containing positional inaccuracies therein and the error correction system correcting for such inaccuracies.
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