Method of driving antiferroelectric liquid crystal display

Details Method of driving antiferroelectric liquid crystal display Method of driving antiferroelectric liquid crystal display

1995-06-07

1999-10-26

Lao, Lun-Yi

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 95, 345210, G09G 336

Patent

active

059736593

ABSTRACT:
A method realizes gradations on a display employing an antiferroelectric liquid crystal material. The method involves at least two scan periods to drive the display. The waveforms of voltages applied to the display in the two scan periods are symmetrical to each other with respect to 0 V. Each of the scan periods consists of a selected period and an unselected period. The waveform of a voltage applied in the selected period is modulated to control the response time of the antiferroelectric liquid crystal material and adjust the light transmittance thereof in the following unselected period.

REFERENCES:
patent: 5459481 (1995-10-01), Tanaka et al.
patent: 5615026 (1997-03-01), Koden
Fourth International Conference on Ferroelectric Liquid Crystals, Program Book of Abstracts, Sep. 28-Oct. 1, 1993, Tokyo, Japan, Komaba Eminence, Tokyo.
"Full-Color Antiferroelectric Liquid Crystal Display," Norio Yamamoto et al., Ferroelectrics, 1993, vol. 149, pp. 295-304.

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