Redundant shift registers for scanning circuits in liquid crysta

Details Redundant shift registers for scanning circuits in liquid crysta Redundant shift registers for scanning circuits in liquid crysta

1993-03-24

1998-08-18

Brier, Jeffery

Computer graphics processing and selective visual display system

Display driving control circuitry

345 93, 345100, G09G 336

Patent

active

057963908

ABSTRACT:
A display device having a plurality of select lines includes redundant select line scanners. Each scanner includes a plurality of substantially identical stages having an input terminal and an output terminal. The stages and select lines are ordinally numbered and correspondingly numbered stages are connected to opposite ends of the correspondingly numbered select lines by separate line segments. The stages within each scanner are cascaded by connecting the output terminal of each stage to the input terminal of the immediately succeeding stage. Failed stages of a scanner are replaced by the correspondingly numbered stage of the other scanner simply by opening the separate line segment of the failed stage.

REFERENCES:
patent: 4633242 (1986-12-01), Sekiya
patent: 5063378 (1991-11-01), Roach
patent: 5136622 (1992-08-01), Plus

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