Liquid crystal device with a ferroelectric film

Details Liquid crystal device with a ferroelectric film Liquid crystal device with a ferroelectric film

1987-09-10

1989-07-25

Miller, Stanley D.

350339R, 350341, 350350S, 350334, G02F 113

Patent

active

048506800

ABSTRACT:
An improved liquid crystal device is described such as a display. The device comprises a pair of substrates, a liquid crystal layer, an electrode arrangement, and a ferroelectric film. The ferroelectric film is formed on the inside of the substrate by spining method using a mixture of a ferroelectric material and an organic resin. When coating, the mixture is diluted with a solvent so that the ferroelectric film can be formed as a thin film. In advance of curring, the ferroelectric film is subjected to an electric field and its dipole moment is aligned and fixed in a direction perpendicular to the substrate. In virtue of the dipole moment, the liquid crystal device can be controlled by applying a voltage in one direction with a high stability.

REFERENCES:
patent: 3725899 (1973-04-01), Greubel
patent: 4040720 (1977-08-01), York
patent: 4563059 (1986-01-01), Clark et al.
patent: 4714323 (1987-12-01), Katagiri et al.
Tannas et al., "Matrix Addressed Liquid Crystal/Ferroelectric Display", SID 73, pp. 177-178, May 15, 1973.

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