Apparatus for optical navigation

Details Apparatus for optical navigation Apparatus for optical navigation

2003-09-04

2008-09-09

Awad, Amr (Department: 2629)

Telegraphy

Systems

Position coordinate determination for writing

C345S179000

Reexamination Certificate

active

07423227

ABSTRACT:
An apparatus for optical navigation. The apparatus has a surface comprising an aperture, wherein the surface is configured to be moveable against an illuminated surface having a detectable texture. An optical motion detection circuit is integral to the apparatus and optically coupled to the detectable texture of the display screen. The optical motion detection circuit produces motion signals indicative of motion of the surface relative to the detectable texture of the illuminated surface, wherein the optical motion detection circuit is operable to detect the detectable texture without requiring an integral illumination source.

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