LIGHT MODULATING INPUT DEVICE FOR CAPTURING USER CONTROL INPUTS
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United States of America Patent
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app pub date -
Jul 6, 2005
filing date -
Jul 6, 2005
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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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