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A CMOS motion detector system for pointing devices

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5 Author(s)

A motion detector system uses an array of 93 photodiodes integrated along with processing circuits to detect the motion of a printed random pattern on a ball used in a pointing device application. It is based on the detection and tracking of spot edges passing over a matrix of pixels during the period between two light pulses. Motion in x and y directions is estimated by aggregating local information about moving edges over the photosensitive pixels. The 4.4×4.3 mm2 chip detects the ball motion from 0 to 11.8 in/s with a resolution higher than 800 dpi over a 100-2000 mW/m2 light-intensity range

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:31 ,  Issue: 12 )

Date of Publication:

Dec 1996

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