Optical jog wheel with spiral coding element
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United States of America Patent
Stats
-
Aug 21, 2012
Grant Date -
May 27, 2010
app pub date -
Jan 27, 2010
filing date -
Nov 1, 2006
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A user navigational apparatus. The user navigational apparatus includes a dial, a coding element, and an encoder. The coding element is coupled to a dial. The coding element includes a track of alternating reflective and non-reflective sections, each having a substantially oblique leading edge relative to a direction of movement of the coding element. The encoder includes an emitter and a detector. The emitter generates a light signal incident on the track of the coding element. The detector detects a reflected light signal which corresponds to a portion of the incident light signal that is reflected off of the reflective sections of the track. The detector also generates a channel signal corresponding to the reflected light signal.
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