Optical coordinate system input device

Details Optical coordinate system input device Optical coordinate system input device

1987-01-29

1989-03-14

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250205, 340712, 341 5, G01V 904

Patent

active

048126420

ABSTRACT:
An optical coordinate system input device includes a plurality of light emitting elements aligned in X and Y directions and sequentially, selectively supplied with a drive current, and a plurality of light receptor elements opposed to the respective light emitting elements each receiving a light signal from opposed one of the light emitting elements. The device specifically includes an adjusting circuit to adjust the value of the drive current flowing in the light emitting elements.

REFERENCES:
patent: 4313109 (1982-01-01), Funk et al.
patent: 4645920 (1987-02-01), Carroll et al.
patent: 4652741 (1987-03-01), Golborne

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