Low-power electromagnetic digitizer tablet
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United States of America Patent
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-
Aug 28, 1990
Grant Date -
N/A
app pub date -
Nov 15, 1989
filing date -
Nov 15, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A low-power electromagnetic digitizer table employing triangular-shaped electrodes arrayed in a single plane. A pointing device coil when energized induces signal voltages in the electrodes underneath. The electrodes are scanned in timed relation, and the induced voltages digitized and compared to determine the X/Y coordinates of the pointing device with respect to the electrode array.
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