Digital display device

Details Digital display device Digital display device

1975-11-03

1978-08-08

Trafton, David L.

Communications: electrical

Systems

With specific power supply

313513, 340378R, 350333, G02F 113, G09F 932

Patent

active

RE0297275

ABSTRACT:
In an improved digital display device relying on the phenomenon of dispersion of incident light by nematic crystals across which an electric field is imposed, an arrangement of transparent conductive segments in groups on opposing parallel plates makes it possible to reduce the number of leads necessary for displaying any digit from zero to nine from the conventional eight leads to six leads. The impressed voltage necessary for causing the nematic liquid crystals to disperse light is applied in pulses to different segments in each group in succession, the pulses being supplied at a sufficiently high frequency so that each pulsed segment appears to be continuously actuated.

REFERENCES:
patent: 3505804 (1970-03-01), Hofstein
patent: 3566391 (1971-02-01), Lally
patent: 3580421 (1971-05-01), Bickford
patent: 3646544 (1972-02-01), Yamaguchi

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