Data entry device utilizing writing implement rotation
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United States of America Patent
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Mar 15, 2016
Grant Date -
Aug 19, 2010
app pub date -
Feb 17, 2009
filing date -
Feb 17, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A writing implement and system using that writing implement are disclosed. The writing implement includes a pen having an elongated body with a plurality of light sources arranged around an outer surface of the body. Each light source has a unique identity. A pen controller that activates each light source to emit light such that the identity of that source can be ascertained by a detector external to the pen. The number of light sources is greater than or equal to 2, and the light sources are arranged such that at least one of the light sources is visible to a detector external to the pen at any time. The detector can then determine the angle of rotation of the pen relative to a fixed reference direction.
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