Sequential control process for a matrix display

Details Sequential control process for a matrix display Sequential control process for a matrix display

1984-02-01

1986-11-25

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

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

340765, 340805, 350333, G09G 336

Patent

active

046252045

ABSTRACT:
The invention relates to a sequential control process for a matrix display using the cholesteric - nematic phase transition effect of a liquid crystal. This process consists of sequentially applying to the columns of electrodes of the display, a blanking signal followed by an addressing signal, the rows of electrodes of said display being addressed in parallel, in order to obtain the displayed or undisplayed state of the liquid crystal, followed by the sequential application of an addressing signal to the rows of electrodes, the columns of electrodes being addressed in parallel, in order to maintain the displayed or undisplayed state of the liquid crystal, while significantly improving the contrast.

REFERENCES:
patent: 4041481 (1977-08-01), Sato
patent: 4109241 (1978-08-01), Shanks
patent: 4317115 (1982-02-01), Kawakami et al.
patent: 4380008 (1983-04-01), Kawakami et al.
IEEE Journal of Solid State Circuits, vol. SC-13, No. 1, Feb. 1978.

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