Matrix display systems

Details Matrix display systems Matrix display systems

1988-10-24

1991-05-07

Oberley, Alvin E.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340805, 350333, G09G 336

Patent

active

050140485

ABSTRACT:
An active matrix addressed liquid crystal display system suitable for TV purposes, driven by applying to one of the conductors associated with each display element drive signals comprising a selection signal portion for setting a display condition followed by a sustain signal portion for sustaining that condition for an interval prior to receipt of the next selection signal, the magnitude of the sustain signal is decreased over its duration, thereby avoiding vertical cross-talk problems or the need to increase the number of diode structures. The sustain signal is decreased gradually, either continuously or in steps, so as to minimise the mean voltage across the non-linear element, and preferably in accordance with the decay time constant of the liquid crystal material of the display element.

REFERENCES:
patent: 4233603 (1980-11-01), Castleberry
patent: 4709992 (1987-12-01), Ueno
patent: 4715685 (1987-12-01), Yaniv et al.
patent: 4731610 (1988-03-01), Baron et al.
patent: 4748445 (1988-05-01), Togashi et al.
patent: 4892384 (1990-01-01), Kuijk

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