Ferroelectric liquid crystal device with AC electric field pretr

Details Ferroelectric liquid crystal device with AC electric field pretr Ferroelectric liquid crystal device with AC electric field pretr

1995-04-10

1996-06-25

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 76, 359100, G02F 1141

Patent

active

055305695

ABSTRACT:
A ferroelectric liquid crystal device is constituted by a pair of oppositely spaced substrates each having an electrode thereon, and a layer of ferroelectric liquid crystal disposed between the substrates. The ferroelectric liquid crystal is disposed in a thickness sufficiently large to retain its helical structure in its as-injected state but is placed in a non-helical structure showing bistability by application of an AC electric field to the liquid crystal layer prior to a routine drive for normal optical modulation by application of external drive voltage signals.

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