Liquid crystal display

Details Liquid crystal display Liquid crystal display

1995-09-21

1998-03-10

Ahmad, Nasser

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With charge transferring layer of specified composition

349 96, 349106, 349123, 349128, G02F 11337

Patent

active

057259151

ABSTRACT:
A liquid crystal display having heat resistance, a sufficiently large pretilt angle, and capable of preventing generation of domains and improving the reliability thereof is disclosed. Each alignment layer has, on the surfaces thereof, roof-like concave and convex rows, formed by repeatedly, in a first direction, forming convex portions each consisting of a longer side portion and a shorter side portion, and valley-like concave and convex rows having the height that is lower than that of the roof-like concave and convex rows and formed in the same direction as that of the roof-like concave and convex rows in such a manner that the roof-like concave and convex rows and the valley-like concave and convex rows are adjacently and alternately formed. Thus, concaves and convexes having a unit length of repetition, that is shorter than a unit length of repetition of the concaves and convexes formed in the first direction, are formed in a second direction that is substantially perpendicular to the first direction. Furthermore, the alignment layer is made of a compound having main chains, that are stable with respect to UV light, and side chains, each of which has an aliphatic ringing group to which aromatic groups are bonded, and which cross-link between the main chains, wherein the aromatic groups are aligned substantially in the first direction.

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Jpn. J. Appl. Phys. vol. 31 (1992) pp. 2155-2164, Part 1, No. 7, Jul. 1992, "Surface-Induced Parallel Alignment of Liquid Crystals by Linearly Polymerized Photopolymers" by Martin Schadt, Klaus Schmitt, Vladimir Kozinkov and Vladimir Chigrinov.

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