Apparatus for increasing the effective yield of displays with in

Details Apparatus for increasing the effective yield of displays with in Apparatus for increasing the effective yield of displays with in

1994-04-14

1997-04-08

Hjerpe, Richard

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345100, 345904, G09G 500, G09G 336

Patent

active

056192231

ABSTRACT:
A redundant row select driver circuit system is provided for enhancing manufacturing yield and reducing manufacturing costs in the liquid crystal data displays. In particular, a row select driver circuit is provided with redundant subcircuits that can effectively replace any damaged subcircuit within the row select driver circuit. In addition, there is disclosed a capacitance compensating scheme to adjust the gray scale level in a damaged row select line with a break inside the display area. And finally, an enhanced diagnostic scheme is disclosed for testing of each row select driver subcircuits in a active matrix display having row select driver circuits connected to each end of row select lines.

REFERENCES:
patent: 4930875 (1990-06-01), Inoue et al.
patent: 5063378 (1991-11-01), Roach
patent: 5206632 (1993-04-01), Dupont et al.
patent: 5313222 (1994-05-01), Lee
patent: 5555001 (1996-09-01), Lee et al.

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