Light communication equipment

Details Light communication equipment Light communication equipment

1985-05-15

1989-08-08

Griffin, Robert L.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455613, 400 88, H04B 900

Patent

active

048560901

ABSTRACT:
A light communication equipment comprises a photo-sensor for sensing a modulated light signal, a processor for demodulating the light signal sensed by the photo-sensor and processing it, and a keyboard having a plurality of keys for instructing processing to the processor. The processor is housed in a housing and the keyboard is attached to the housing. The photo-sensor has a photo-sensing direction which is on a line extending from a longitudinal line on the keyboard.

REFERENCES:
patent: 4021608 (1977-05-01), Brodeur
patent: 4267606 (1981-05-01), Stelter et al.
patent: 4313227 (1982-01-01), Eder
patent: 4328589 (1982-05-01), Ogita
patent: 4402090 (1983-08-01), Gfeller et al.
patent: 4456793 (1984-06-01), Baker et al.
patent: 4499608 (1985-02-01), Broockman et al.
patent: 4553267 (1985-11-01), Crimmins

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