Data processing system having optically linked subsystems, inclu

Details Data processing system having optically linked subsystems, inclu Data processing system having optically linked subsystems, inclu

1979-07-18

1981-03-03

Groody, James J.

Communications: electrical

Audible indication

Percussion-type sound producer

455612, G06F 302, A04B 900

Patent

active

042544076

ABSTRACT:
A data processing system having optically linked subsystems, including an optical keyboard. The optical keyboard includes sequentially strobed LED's arranged to provide intersecting light paths in an X-Y matrix. A key on the keyboard is associated with each intersection of the light paths. When the key is depressed, the optical signals on the intersecting light paths are blocked. The resulting coded optical signals are used directly in transmitting to another subsystem the data entered at the keyboard.

REFERENCES:
patent: 3588838 (1971-06-01), Felcheck
patent: 3614402 (1971-10-01), Higgins
patent: 3856127 (1974-12-01), Halfon et al.
patent: 4047158 (1977-09-01), Jennings
patent: 4089584 (1978-05-01), Polczynski
IEEE Transactions on Communications, Rawson et al., vol. Com-26, No. 7, Jul. 1978, pp. 983-990.

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