Method and apparatus for driving ferroelectric liquid crystal de

Details Method and apparatus for driving ferroelectric liquid crystal de Method and apparatus for driving ferroelectric liquid crystal de

1986-05-22

1989-07-04

Miller, Stanley D.

Communications: electrical

Land vehicle alarms or indicators

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

350333, 350332, 340805, G02F 113, G09G 336

Patent

active

048445908

ABSTRACT:
A driving method for a ferroelectric liquid crystal device having a matrix electrode arrangement comprising a plurality of scanning lines and a plurality of data lines, and a ferroelectric liquid crystal disposed between the scanning lines and the data lines and having a threshold voltage for swtiching, a picture element being formed at each intersection of the scanning lines and the data lines. The driving method has a previous scanning period in which a prescribed number of scanning lines are scanned line-sequentially; a subsequent scanning period in which a prescribed number of subsequent scanning lines are scanned line-sequentially; and an auxiliary signal-application period provided between the previous and subsequent scanning periods, in which an auxiliary signal below the threshold voltage is applied to all or a prescribed part of the picture elements.

REFERENCES:
patent: 4317115 (1982-02-01), Kawakami et al.
patent: 4508429 (1985-04-01), Nagae et al.
patent: 4548476 (1985-10-01), Kaneko
patent: 4556880 (1985-12-01), Hamada
patent: 4638310 (1987-01-01), Ayliffe
patent: 4640582 (1987-02-01), Oguchi et al.
patent: 4655561 (1987-04-01), Kanbe et al.

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