Liquid crystal display

Details Liquid crystal display Liquid crystal display

1991-10-15

1993-09-28

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 75, 359102, G02F 1133

Patent

active

052490700

ABSTRACT:
A liquid crystal display and a method for producing the same. The display has a liquid crystal panel including a plurality of pixels, wherein the pixels have electrodes for applying a voltage thereto. A layer of a liquid crystal material is disposed between the electrodes. The pixels are configured so that a single tilt domain of the liquid crystal material exists when a voltage is not applied to the electrodes, and a first tilt domain and a second tilt domain of the liquid crystal material exist when a sufficient voltage is applied to said electrodes. This is achieved by using either a chiral dopant in twisted nematic liquid crystal material, or orientation layers producing a twist of less than 90.degree., or both. The contrast is very symmetrical for up/down viewing angles.

REFERENCES:
patent: 4252417 (1981-02-01), Scheffer et al.
patent: 4496220 (1985-01-01), Goscianski
patent: 4566758 (1986-01-01), Bos
patent: 4832462 (1989-05-01), Clark et al.
patent: 5071228 (1991-12-01), Waldmann et al.
Fahrenschon et al, "Deformation of a Pretilted Nematic Liquid Crystal Layer in an Electric Field", Applied Physics, vol. II, 1976 pp. #67-74.

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