Displays

Details Displays Displays

1975-02-20

1976-09-07

Trafton, David L.

Communications: electrical

Systems

Portable self-contained

324 96, 350160LC, G01R 1340

Patent

active

039797430

ABSTRACT:
A liquid crystal analogue display device has a pair of electrodes between which a nematic liquid crystal material is disposed, so that the liquid crystal is switched from a homogeneous to a homeotropic state when the voltage between the electrodes exceeds a given threshold. A potential gradient is established along one of the electrodes, and a variable potential, within this gradient, is applied to the other electrode, for example from a fuel tank contents gauge. The position at which a low voltage or null, below the threshold switching potential, is established between the two electrodes will be dependent upon the magnitude of the variable voltage, so that by suitable illumination of the cell a movable display such as a line is obtained which is a direct analogue of the quantity represented by the variable voltage.

REFERENCES:
patent: 3667039 (1972-05-01), Garfein et al.
patent: 3727527 (1973-04-01), Borowski et al.
patent: 3774195 (1973-11-01), Schulthess et al.
patent: 3820875 (1974-06-01), Bohmer
patent: 3834794 (1974-09-01), Soref
patent: 3846775 (1974-11-01), Epstein
patent: 3857628 (1974-12-01), Strong
patent: 3869196 (1975-03-01), Kubota

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