OPTICAL NAVIGATION SENSOR, ELECTRONIC DEVICE WITH OPTICAL NAVIGATION FUNCTION AND OPERATION METHOD THEREOF
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United States of America Patent
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Issued Date -
Nov 3, 2016
app pub date -
Apr 28, 2015
filing date -
Apr 28, 2015
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Abstract
The present disclosure illustrates an optical navigation sensor. The optical navigation sensor comprises a pixel array, a navigation unit and an edge detection unit. The pixel array is configured for capturing an image once every capturing interval. The navigation unit is configured for generating a navigation signal according to the images. The edge detection unit configured for generating an edge detection signal according to the images and the navigation signal. When the rotation unit performs a rotation action, the pixel array starts to capture the image associated with the surface. The navigation unit determines a rotation direction of the rotation unit in response to the images and generates the navigation signal. The edge detection unit receives the navigation signal and the images, and generates the edge detection signal in response to the rotation direction and the number of the recognition block which passes a sensing area.
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