Reversible printing display

Details Reversible printing display Reversible printing display

1977-09-28

1979-01-30

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

3403782, 340763, 340785, 350332, 350335, 350336, 340759, G02F 113

Patent

active

041375246

ABSTRACT:
The present invention includes a multi-electrode structure including a counterelectrode, a display electrode in registry with the counterelectrode and finally an intermediately positioned apertured background electrode. Display material is contained between the counterelectrode and the background electrode. Depending upon the electric field conditions existing between the various electrodes, a display image may be created with a first dark-light contrast relationship relative to a background. An appropriate driving circuit is capable of changing the field relationship between the electrodes so that a reverse contrast relationship appears between a displayed image and its background.

REFERENCES:
patent: 3167607 (1965-01-01), Marks et al.
patent: 3622224 (1971-11-01), Wysocki et al.
patent: 3647280 (1972-03-01), Klein et al.
patent: 3960751 (1976-06-01), Moriyama et al.
patent: 4037927 (1977-07-01), Krueger

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