Liquid crystal display device with two insulating films, the sec

Details Liquid crystal display device with two insulating films, the sec Liquid crystal display device with two insulating films, the sec

1992-08-18

1993-07-27

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359054, G02F 11343, G02F 11333

Patent

active

052315266

ABSTRACT:
The invention presents a liquid crystal display device characterized by forming pixel elements of transparent electrodes on the confronting surface of a pair of light-transmissive substrates, forming insulating films followed by orientation films on the light-transmissive substrates, and filling the gap of the light-transmissive substrates with liquid crystal.
At least on one of the light-transmissive substrates, insulation films of different materials contact the orientation film in the pixel portions and non-pixel portions, or the insulation film is formed only in the pixel portions. According to the invention, therefore, the asymmetricity of liquid crystal molecular orientation is weak in the pixel portions, and a bistable memory effect may be obtained. Further, in the non-pixel portions the orientation asymmetricity is intensified, so that a uniform clarity may be obtained.

REFERENCES:
patent: 4097121 (1978-06-01), Tauer
patent: 4593978 (1986-06-01), Mourey et al.
patent: 4733948 (1988-03-01), Kitahara
patent: 4763995 (1988-08-01), Katagiri et al.
patent: 4932757 (1990-06-01), Hanyu et al.
patent: 4948706 (1990-08-01), Sugihara et al.
The Article Entitled "Surface-Induced Helix-Unwinding Process in Thin Homogeneous Ferroelectric Smectic Cells of DOBAMBC" to Kondo et al. Japanese Journal of Applied Physics, vol. 22, No. 5, May 1983, pp. L294-L296.

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