Liquid crystal displays

Details Liquid crystal displays Liquid crystal displays

1975-12-10

1978-08-22

Trafton, David L.

Communications: electrical

Systems

Portable self-contained

350333, G02F 113

Patent

active

041092414

ABSTRACT:
A liquid crystal display comprises a liquid crystal material layer contained between transparent slides which carry electrodes arranged in lines and columns to form an x, y matrix with x, y intersections. The liquid crystal layer at the intersections are turned on line by line by a blanking voltage, turned off by application of a zero voltage, and held at a threshold voltage at other times. The voltages are applied from a three phase supply by applying one phase to x electrodes a second phase to the y electrodes to maintain a threshold voltage at x, y intersections, and applying the third phase to both x, y electrodes for turning an intersection off. Alternatively the voltages may be applied from a two different frequency waveform supply.

REFERENCES:
patent: 3575492 (1971-04-01), Nester et al.
patent: 3703331 (1972-11-01), Goldmacher et al.
patent: 3864022 (1975-02-01), Moriyama et al.
patent: 3895373 (1975-07-01), Freiser et al.

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