Wheel driver and portable electronic device having the same
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United States of America Patent
Stats
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Sep 29, 2015
Grant Date -
May 13, 2010
app pub date -
Nov 9, 2009
filing date -
Nov 7, 2008
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A pattern wheel driver is provided. The pattern wheel driver includes a rotatable pattern wheel with patterned regions repeatedly formed on the pattern wheel. Each of the patterned regions has a plurality of patterns. Each of the plurality of patterns has a different width. The pattern wheel driver also includes a detector for detecting the plurality of patterns, mounted at a position where the patterned regions of the pattern wheel pass when the pattern wheel rotates. The pattern wheel driver also includes an encoder for producing a signal indicating whether the pattern wheel rotates in a forward direction or a reverse direction based on signals produced by the detector.
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