Driving circuit for a matrix-addressed liquid crystal display de

Details Driving circuit for a matrix-addressed liquid crystal display de Driving circuit for a matrix-addressed liquid crystal display de

1977-01-21

1978-04-04

Bauer, Edward S.

Communications: electrical

Land vehicle alarms or indicators

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

340324M, G02F 113

Patent

active

040824306

ABSTRACT:
In a driving circuit for a liquid crystal display matrix, a source of a direct or low-frequency voltage is connected to drive the selected row and column electrodes, and a high frequency voltage is connected to the driving circuit so that the high frequency potential is effective in combination with the low frequency or direct voltage at non-frequency voltage is effective at the selected crossovers. The high frequency voltage suppresses changes in the optical properties of the liquid crystal at the non-selected crossovers.

REFERENCES:
patent: 3499112 (1970-03-01), Heilmeier et al.
patent: 3575492 (1971-04-01), Nester et al.

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