Polyimides for anchoring liquid crystals, display devices including same and method for the preparation of said devices
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United States of America Patent
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Apr 4, 2006
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app pub date -
May 30, 2002
filing date -
May 31, 2001
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Abstract
The present invention relates to novel polyimides derived from 6FDA and from 3,3-dihydroxy-4,4′-diaminobiphenyl and novel polyimides derived from PMDA and from Bis-AP-AF, having alkyl, arylalkyl, heteroarylalkyl, (cycloalkyl)alkyl, fluoroalkyl or siloxane side groups. The present invention also relates to a method of producing nematic liquid-crystal devices, which comprises the steps consisting in: depositing one of the polyimides according to the invention on a substrate; annealing the polyimide in one or more steps; and defining an azimuthal orientation of the polyimide coating.
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