Liquid crystal position determining system and wand device
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United States of America Patent
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-
Dec 11, 1990
Grant Date -
N/A
app pub date -
Oct 6, 1989
filing date -
Oct 6, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A coordinate position determining system and method includes a liquid crystal material separating first and second groups of conductors. The tablet is at least partially light transmissive, but may include a partially reflective layer. The first and second groups or conductors are sequentially scanned at different times. A wand adapted to be positioned against the tablet includes a light detector, and may also include a light source.
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