Pointing device utilizing a photodetector array

Details Pointing device utilizing a photodetector array Pointing device utilizing a photodetector array

G - Physics

06

F

G06F 3/033 (2006.01) G06F 1/16 (2006.01) G06K 11/18 (1990.01)

Patent

CA 2107743

ABSTRACT A cursor control device for personal computers and workstations includes a randomly speckled ball illuminated with diffuse lighting. An image of at leasta portion of the illuminated area of the speckled ball is focused by an optical element such as a diffractive optical element onto a photosensitive array. Logicassociated with the photosensitive array determines movement of the ball across the array, and translates that movement into conventional cursor control signalssupplied to a host system.

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