Optical input cursor device using optical grid means

Details Optical input cursor device using optical grid means Optical input cursor device using optical grid means

1989-03-23

1989-11-14

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340710, G09G 302

Patent

active

048809683

ABSTRACT:
An optical input device which uses a reflection plane with horizontal and perpendicular lines to reflect light which is then amplified and transmitted by a lens and a reflector to a receiver with horizontal and perpendicular optical grids to receive light representing brightness and shadow and give signal for determination of distance and direction of displacement, and the signal is then processed by microprocessor to control movement of cursor or like in computer system.

REFERENCES:
patent: 4409479 (1983-10-01), Sprague et al.
patent: 4546347 (1985-10-01), Kirsch
patent: 4564835 (1986-01-01), Dhawan
patent: 4686329 (1987-08-01), Joyce
patent: 4686332 (1987-08-01), Greanias et al.
patent: 4751380 (1988-06-01), Victor et al.

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