Ferroelectric liquid crystal device with specific pitch in each

Details Ferroelectric liquid crystal device with specific pitch in each Ferroelectric liquid crystal device with specific pitch in each

1991-01-28

1991-09-10

Miller, Stanley D.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359100, 359101, G02F 113

Patent

active

050468308

ABSTRACT:
A ferroelectric liquid crystal device, in which orientation is applied for either one of both or two substrates having transparent electrodes formed thereon for arranging the liquid crystal molecules in parallel with the substrate and a ferroelectric crystal is filled into the gap between two sheets of the substrates, wherein the ferroelectric liquid crystal has a helical texture pitch in the smectic phase not less than 1 um and not greater than 3.5 micrometers, while having a pitch in the cholesteric phase of not less than 25 micrometers. Also, the length of the gap between the substrates ranges from 6 to 13 micrometers. The light scattering type liquid crystal device capable of storing the state of display and displaying a large picture area at high contrast can be obtained.

REFERENCES:
patent: 3837730 (1974-09-01), Hatfield et al.
patent: 4668051 (1987-05-01), Mourey et al.
patent: 4943387 (1990-07-01), Furukawa et al.
patent: 4969719 (1990-11-01), Bradshaw et al.
patent: 4997264 (1991-03-01), Coulson

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