Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1980-01-07
1981-10-13
Curtis, Marshall M.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340713, 340166EL, 340719, G06F 314
Patent
active
042951372
ABSTRACT:
A display system includes a plurality of thin-film electroluminescent elements each having a digit electrode and a segment electrode, a set of digit drivers, and a set of segment drivers. The digit drivers and the segment drivers are operative, during precharging portions of digit and segment control signals, to precharge the elements of the display by applying a first voltage to the digit electrode and a second voltage to the segment electrode of each element. The digit drivers are further operative, during addressing portions of the digit control signal, to selectively address elements of the display by applying the second voltage to the digit electrodes of the elements which are to be addressed and by applying the first voltage to the digit electrodes of the elements which are not to be addressed. The segment drivers are further operative, during energizing portions of the segment control signal, to selectively energize elements which are addressed by applying the first voltage to the segment electrodes of the elements which are to be energized and by applying the second voltage to the segment electrodes of the elements which are not to be energized. The first voltage can be ground potential and the second voltage can be a positive dc voltage which is greater than the threshold voltage of the electroluminescent elements.
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Thin-Film EL Displays; Suzuki et al.; Information Display; vol. 13, Spring 1977, pp. 14-19.
Curtis Marshall M.
GTE Laboratories Incorporated
McClellan William R.
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