Optical navigation system with lift detection
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United States of America Patent
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Jan 22, 2013
Grant Date -
Dec 22, 2011
app pub date -
Jun 22, 2010
filing date -
Jun 22, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
An optical navigation system with a lift detection module is provided for preventing cursor movement if the optical navigation system has been lifted from the navigation surface. The optical navigation system may include an image sensor, a controller and a lift detection module. The lift detection module may be operatively coupled with the image sensor and the controller to selectively report a motion data upon determining a lift by comparing the average of the photosensitive pixel elements with a pixel element threshold value and the surface quality value with a surface quality threshold value. The lift detection module may be incorporated in a microcontroller, wherein the microcontroller may be added to a navigation system to provide an additional lift detection feature.
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