Display apparatus

Details Display apparatus Display apparatus

1980-06-25

1983-05-31

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340763, 340805, 350332, 350336, G09G 318

Patent

active

043863507

ABSTRACT:
A display panel of the liquid crystal type provides a positive color display of segments or unit display areas using a reduced number of divided electrodes and an increased number of different driving signals. On one side of the panel there is a separate electrode encompassing each display area and all such electrodes include a display area. On the other side there are several common electrodes, each encompassing at least one display area and all cumulatively encompassing all of the display areas. A display area is selected for display by applying driving signals to its opposed electrodes such that substantially zero voltage is across the selected display area thereby leaving colored appearance in the selected display area. All other display areas and background areas are decolored by applying to the respective opposed electrodes driving signals resulting in a liquid crystal threshold voltage being applied across said non-selected display areas and said background areas.

REFERENCES:
patent: 3831166 (1974-08-01), DeNardo
patent: 4105297 (1978-08-01), Shimizu
patent: 4142182 (1979-02-01), Kmetz
patent: 4212011 (1980-07-01), Waldron
patent: 4241344 (1980-12-01), Kmetz et al.

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