Ferroelectric liquid crystal panel having a ferroelectric optica

Details Ferroelectric liquid crystal panel having a ferroelectric optica Ferroelectric liquid crystal panel having a ferroelectric optica

1990-02-16

1992-06-30

Zazworsky, John

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 56, 359 63, 359 73, G02F 1133

Patent

active

051268647

ABSTRACT:
A ferroelectric liquid crystal panel comprising 2 layers of liquid crystal cells, each of which comprises a ferroelectric crystal sealed between two substrates and then is laminated together; wherein one of said liquid crystal cells is operated as a panel driving liquid crystal cell and the other of said liquid crystal cells is operated as an optical compensating cell, while both said liquid crystal cells being driven by rectangular wave AC signals. Furthermore, the ferroelectric liquid crystal panel is constructed to operate in an intermediate tone by varying the phases of said rectangular wave AC signals applied to the liquid crystal cells of the first and second layers.

REFERENCES:
patent: 3881808 (1975-05-01), Gurtler et al.
patent: 4408839 (1983-10-01), Wiener-Avnear
patent: 4634226 (1987-01-01), Isogai et al.
patent: 4715688 (1987-12-01), Harada et al.
patent: 4909606 (1990-03-01), Wada et al.

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