Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
January 9, 2007
Patent Application Number
11175757
Date Filed
July 6, 2005
Patent Primary Examiner
Patent abstract
An input device comprises a light source, a light modulator, and a sensor. The light modulator is configured to emit a path of light. The light modulator is arranged relative to the light source transversely across the path of light to produce a light contrast pattern from the light modulator. The sensor module is configured to detect relative motion between the light contrast pattern and the sensor module.
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