Liquid-crystal display with addressing scheme to achieve high co

Details Liquid-crystal display with addressing scheme to achieve high co Liquid-crystal display with addressing scheme to achieve high co

1996-02-07

1999-09-28

Hjerpe, Richard A.

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 94, 345100, G09G 336

Patent

active

059596023

ABSTRACT:
In a liquid-crystal display device having a matrix structure, a plurality of lines is selected simultaneously during periodic scanning of the line electrodes, and the total selection time is split into a number of time intervals which occur distributed over the frame time. The select voltages required can be chosen to be considerably smaller than the voltages according to the standard Alt & Pleshko multiplex addressing scheme, which results in considerably lower voltages over the display elements during selection. These lower voltages, combined with the splitting of the total selection period per frame time into a number of time intervals distributed over the frame time lead to a reduction of the so-called "FRAME RESPONSE" behavior and therefore result in improved contrast and brightness of rapidly switching liquid-crystal effects compared to the Alt & Pleshko addressing.

REFERENCES:
patent: 5262881 (1993-11-01), Kuwata et al.
patent: 5546102 (1996-08-01), Schetter
"A Generalized Addressing Technique For RMS Responding Matrix LCDS", T. N. Ruckmongathan, IEEE, pp. 80-85, (1988).

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