Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1993-09-21
1996-09-24
Hjerpe, Richard
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 34, 34081544, G09G 304
Patent
active
055595286
ABSTRACT:
Redundant segment display characters are used to provide a fail-safe indication of critical parameters. In one preferred form of the invention, selected segments of a redundant segment character include pairs of segments that are arranged proximate to each other and extend generally parallel to each other. The pairs of redundant segments are activated simultaneously in response to multiplexed fore plane and back plane drive signals applied to conductive regions of a liquid crystal display. The remaining portions of the redundant segment character each comprise single activated regions. The portions of the display character that include redundant segments are selected to minimize errors in reading a numeric value indicated by the character in the event that one of the segments fails to operate properly. In another preferred form of the invention, all of the portions of the character are pairs of redundant segments. In yet another embodiment, the pairs of redundant segments are arranged serially, end-to-end. In the event that one of the redundant segments fails to activate or always remains activated, such failure is visually apparent to an operator by comparison to the other segment of the redundant pair.
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Poli Robert G.
Ravid Arie
Abbott Laboratories
Farnandez Stoll Kara
Hjerpe Richard
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