Liquid crystal alignment layer
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United States of America Patent
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Jun 25, 2013
Grant Date -
Aug 11, 2011
app pub date -
Apr 14, 2011
filing date -
Oct 17, 2002
priority date (Note) -
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Abstract
A photopolymer mixture is capable of use for a liquid crystal alignment layer. An alignment layer is formed from such a photopolymer mixture. The mixture comprises at least two polymerisable materials which are blended together in proportion so as to give a predetermined, preferably low, surface energy. A low surface energy, e.g., less than 4×10−2 N/m, can result in an alignment layer which imparts a particular orientation to liquid crystal molecules with out requiring any post-cure treatments. The polymerisable materials may be monomers, oligomers, or diluents that form long chain molecules when cured, and the mixture may contain additives to lower the overall surface energy.
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