Electro-optical mouse with means to separately detect the change

Details Electro-optical mouse with means to separately detect the change Electro-optical mouse with means to separately detect the change

1993-02-24

1994-09-20

Weldon, Ulysses

Computer graphics processing and selective visual display system

Display peripheral interface input device

Cursor mark position control device

250221, G09G 300

Patent

active

053493710

ABSTRACT:
An electro-optical mouse includes two light sources to respectively project light onto a grid of lines on a reflective surface; two cylindrical lenses at right angles to each other to respectively amplify the X and Y line crossings; two detectors to respectively receive the output light signals from the two cylindrical lenses via two reflectors and, generate electrical signals according to the sensed changes in contrast ratio, in order to accurately control the movement of a cursor on the visual display of a computer.

REFERENCES:
patent: 4390873 (1983-06-01), Kirsch
patent: 4647771 (1987-03-01), Kato
patent: 4880968 (1989-11-01), Kwang-Chien
patent: 4935619 (1990-06-01), Heberle

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