Co-ordinate addressing of liquid crystal cells

Details Co-ordinate addressing of liquid crystal cells Co-ordinate addressing of liquid crystal cells

1996-10-30

1998-06-30

Hjerpe, Richard

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 97, 345209, G09G 336

Patent

active

057741042

ABSTRACT:
In an active back-plane coordinate addressed liquid crystal cell whose pixels are set into one state by the application of a unidirectional potential across the thickness of the liquid crystal layer, and into the opposite state if the direction of the applied potential is reversed, refreshing is carried out in two sequential stages in order to avoid cumulative charge imbalance effects. In one stage the pixels are set to their required states, whereas in the other stage they are set to the inverse of those states.

REFERENCES:
patent: 4705345 (1987-11-01), Ayliffe et al.
patent: 4927243 (1990-05-01), Taniguchi et al.
patent: 5041823 (1991-08-01), Johnson et al.
patent: 5220314 (1993-06-01), Mano et al.
patent: 5408248 (1995-04-01), Crossland
PCT/US 89/05700 Johnson Jul. 1990 International Publication No. : WO 90/07768.

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