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OwnerYuichi Mano, Syunichi Sano +3inventors
InventorsYuichi Mano, Syunichi Sano, Go Ono, Mariko Kurosaki, Hideyuki Endo
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A treating agent for liquid crystal alignment which, when used for a liquid crystal display device operating in the in-plane switching mode, is excellent in printability and rubbing resistance and having little residual image or image persistence; a liquid crystal alignment film; and a liquid crystal display device of high display quality employing it. The treating agent for liquid crystal alignment contains a unit structure of polyamic acid or polyimide having a tetravalent organic group constituting an aromatic tetracarboxylic acid and a unit structure of polyamic acid or polyimide having a tetravalent organic group constituting an alicyclic tetracarboxylic acid, at the same time. The liquid crystal alignment film is formed by coating the treating agent for liquid crystal alignment on a substrate, followed by baking and then by rubbing treatment. The in-plane switching liquid crystal display device is prepared by means of the liquid crystal alignment film.
A treating agent for liquid crystal alignment to be employed for a liquid crystal display device which has an electrode structure on one side of a substrate and which is to be driven by an in-plane electric field which is applied substantially in parallel with the substrate, said treating agent for liquid crystal alignment containing a polyamic acid which comprises both unit structures represented by the following formulae (I) and (II):
Dependencies are inferred from the claim text.