Method and apparatus for quasi-3D tracking using 2D optical motion sensors
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United States of America Patent
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Nov 20, 2012
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N/A
app pub date -
Jul 9, 2007
filing date -
Jul 9, 2007
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Abstract
One embodiment relates to a user input device for tracking motion. The device includes a tracking ball and a user-accessible touching area for user manipulation of the tracking ball. First and second two-dimensional sensors are positioned at tracking heights away from the tracking ball. The first two-dimensional sensor may be positioned across the tracking ball and opposite to the user-accessible touching area. The second two-dimensional sensor may be positioned at an angle with respect to a z-axis defined as extending from the user-accessible touching area through a center of the tracking ball to the first two-dimensional sensor. Other embodiments, aspects and features are also disclosed.
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