Method of driving a liquid crystal display apparatus

Details Method of driving a liquid crystal display apparatus Method of driving a liquid crystal display apparatus

1977-03-01

1980-01-29

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340756, 340805, 350331, G09F 932, G06F 314

Patent

active

041863950

ABSTRACT:
A pulse applying method comprising applying a pulse train having a constant period to any one of a selection electrode and a control electrode which are opposed each other through a liquid crystal, while applying to the other a pulse train having a specific phase relationship with the said pulse train, whereby setting the total application time per unit period of the pulse applied between the selection electrode and the control electrode to two states, one being of the case where the liquid crystal operates and the other of the case where the liquid crystal does not operate, thus making the liquid crystal display unit indicative and non-indicative. A clear display with uniform contrast is obtainable. Moreover, a low-voltage drive is possible and the response speed is high.

REFERENCES:
patent: 3918041 (1975-11-01), Mao
patent: 3981004 (1976-09-01), Shimizu et al.
patent: 3995942 (1976-12-01), Kawakami et al.
patent: 4019178 (1977-04-01), Hashimoto et al.
patent: 4048633 (1977-09-01), Sano

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