Matrix type liquid crystal display device

Details Matrix type liquid crystal display device Matrix type liquid crystal display device

1996-10-24

1999-10-12

Zimmerman, Mark K.

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 55, G09G 336

Patent

active

059661119

ABSTRACT:
Burning and flickering effects of a display screen in a matrix-type liquid crystal display device using an anti-ferroelectric liquid crystal medium are avoided by controlling the duration of the holding period to a certain length. A control circuit measures the cycle of the input of the picture signals to one picture frame, and the duration of the blanking period is controlled according to the result of the measurement in order to keep the duration of the holding period constant.

REFERENCES:
patent: 4915477 (1990-04-01), Ohta et al.
patent: 5011269 (1991-04-01), Wakita et al.
patent: 5117298 (1992-05-01), Hirai
patent: 5400048 (1995-03-01), Shimada et al.
patent: 5459481 (1995-10-01), Tanaka et al.
patent: 5631752 (1997-05-01), Tanaka
Optronics (1994) No. 2pp. 58-61 Yamada et al, "Anti-Ferroelectric Liquid Crystal Medium Display".

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