Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1988-03-17
1990-08-21
Oberley, Alvin
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340756, G09G 320
Patent
active
049510371
ABSTRACT:
Fault detection apparatus for segmented digital displays of a capacitive nature. Current probes interposed between the segment drivers and the segments detect the current pulses required by the on and off segments resulting from the square wave energization applied thereto. Discrepancies between the current pulses and the commanded data provide segment fault status. A serial bus transmits the display data from a Control Unit to the display and transmits the Segment Status Data from the display to the Control Unit. The current pulses are sampled pursuant to a pulse mode or square wave mode of operation.
REFERENCES:
patent: 4113361 (1978-09-01), Nakano
patent: 4311993 (1982-01-01), Strobel
patent: 4420748 (1983-12-01), Jurgen
patent: 4541066 (1985-09-01), Lewandowski
Honeywell Inc.
Jensen Roger W.
Levine Seymour
Medved Albin
Oberley Alvin
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