Method of determining an object's position and associated appara

Details Method of determining an object's position and associated appara Method of determining an object's position and associated appara

1997-06-30

1999-12-28

Brier, Jeffery

Computer graphics processing and selective visual display system

Display peripheral interface input device

Including keyboard

345175, G06F 3023

Patent

active

060087986

ABSTRACT:
A method of determining an object's position and associated apparatus provides positional information in a form that may be conveniently communicated to a computer system to calculate the object's position. In a disclosed embodiment, representatively incorporated in a computer keyboard, a method of determining an object's position includes forming an optical grid of overlapping beacons and detecting reflections of the beacons produced by the object when it intersects the grid. The disclosed embodiment utilizes two focused beacons to produce the optical grid.

REFERENCES:
patent: 4507557 (1985-03-01), Tsikos
patent: 4782328 (1988-11-01), Denlinger
patent: 4811004 (1989-03-01), Person et al.

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