Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1997-09-29
2000-09-12
Chow, Dennis-Doon
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 87, G09G 336
Patent
active
061184225
ABSTRACT:
A light scattering type liquid crystal display device is here disclosed which comprises a liquid crystal cell comprising at least electrodes and alignment layers formed on opposite surfaces of a pair of opposite substrates and a chiral nematic liquid crystal layer having a planar structure sealed between the pair of substrates, and a voltage application means for feeding an application voltage to both the electrodes formed respectively on the pair of substrates, wherein by feeding the application voltage having a predetermined voltage waveform to both the electrodes from the voltage application means, a light scattering texture comprising a group of at least 3 planar structures having different twist angles is generated, held or erased in the chiral nematic liquid crystal layer. This display device is not equipped with any polarizing plate, and it has a high utilization efficiency, a wide visual angle and a high-speed response performance and it enables its driving at a low voltage.
REFERENCES:
patent: 4239345 (1980-12-01), Berreman et al.
patent: 5594464 (1997-01-01), Tanaka et al.
patent: 5889566 (1999-03-01), Wu et al.
Higuchi Katsutoshi
Hiroshima Kohki
Nakagomi Kazuhiro
Chisso Corporation
Chow Dennis-Doon
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