METHOD FOR MAKING BISTABLE NEMATIC LIQUID-CRYSTAL DEVICES
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United States of America Patent
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Issued Date -
Jun 28, 2012
app pub date -
Jul 23, 2009
filing date -
Jul 25, 2008
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Abandoned
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Abstract
The object of the invention is a method for making devices with bistable nematic liquid crystals, having a nematic liquid crystal layer placed between two plates, each plate including a strip, an electrode and an alignment layer for nematic liquid crystal, at least one of said alignment layers having low zenithal anchoring for said liquid crystal, small pre-tilt and medium or strong azimuthal anchoring, wherein said at least one of the alignment layers is prepared by depositing a solution comprising a polymer, said polymer is a copolymer or a terpolymer derived from vinyl chloride and vinyl ethers, said solution further comprising an additive, selected from the group formed by aromatic polyimides, precursors of the aromatic polyamic acid type or a mixture of these compounds.
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