Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1995-06-30
2000-09-05
Nguyen, Chanh
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 97, G09G 336
Patent
active
061150215
ABSTRACT:
A ferroelectric liquid crystal panel including a plurality of scanning electrodes, a plurality of signal electrodes crossing the scanning electrodes, a ferroelectric liquid crystal material having two stable orientation states corresponding to different memory angles and provided at intersections of the plurality of scanning electrodes and the plurality of signal electrodes to form a plurality of pixels is driven. The plurality of pixels each have a first threshold characteristic regarding a voltage for switching a display state of the pixel into a non-display state and a second threshold characteristic regarding a voltage for switching the non-display state of the pixel into the display state. An apparatus for driving the ferroelectric liquid crystal panel includes a temperature sensor detecting an operation temperature of the ferroelectric liquid crystal panel; and signal output for outputting a driving signal based on a field frequency fixed at a prescribed reference frequency and a frame frequency determined in correspondence with the operation temperature of the ferroelectric liquid crystal panel detected by the temperature sensor, and writing the driving signal into each of the plurality of pixels at a writing time corresponding to a response time of each of the plurality of pixels changing in accordance with the operation temperature.
REFERENCES:
patent: 4902107 (1990-02-01), Tsuboyama et al.
patent: 5033822 (1991-07-01), Ooki et al.
patent: 5602562 (1997-02-01), Onitsuka et al.
P.W.H. Surguy et al. "The "JOERS/Alvey" Ferroelectric Multiplexing Scheme", Ferroelectrics, vol. 122, pp. 63-79, 1991.
Katsuse Hirofumi
Nonomura Keisaku
Numao Takaji
Conlin David G.
Neuner George W.
Nguyen Chanh
Sharp Kabushiki Kaisha
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