Optical decoder

Details Optical decoder Optical decoder

1985-04-01

1987-03-31

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

340707, 434323, 273DIG28, H04N 700

Patent

active

046547002

ABSTRACT:
An optical decoder to permit differentiating between at least two flashing spots displayed on a cathode ray tube screen is provided by a photosensor and an electrical circuit which is responsive to the absence of flashes during a flashing sequence which is different for the two spots and not distinguishable by the naked eye.

REFERENCES:
patent: 3737566 (1973-06-01), Baer et al.
patent: 3993861 (1976-11-01), Baer
patent: 4329684 (1982-05-01), Monteath et al.

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