Orientation film of liquid crystal having bilaterally asymmetric

Details Orientation film of liquid crystal having bilaterally asymmetric Orientation film of liquid crystal having bilaterally asymmetric

1994-02-28

1995-08-01

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 76, 428 1, G02F 11337

Patent

active

054384214

ABSTRACT:
An orientation film for a liquid crystal display. The film is formed on a substrate and has a first irregular form repeated in a first direction and a second irregular form repeated in a second direction, which is perpendicular to the first direction. The second irregular form has a longer pitch than the pitch of the first irregular form. The profile of the second irregular form in any plane perpendicular to the first direction has a portion inclined with respect to the substrate. The pretilt angle of the orientation film is high. The patterns may be irregular and asymmetric, which may be ridges separated by a continuous groove. The orientation may be formed by using a first mold having one of the patterns, and a second mold with a second pattern, or first and second holographic exposed layers. The orientation layer may be a liquid crystal polymer which is formed by using a heated stamper to form a pattern in a high polymer liquid crystal while applying a voltage.

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