UV curable alignment material for fabrication of monolithic compensators for liquid crystal displays
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United States of America Patent
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Mar 2, 2010
Grant Date -
Apr 19, 2007
app pub date -
May 15, 2006
filing date -
Sep 30, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A segmented, rigid-rod aromatic polyimide mixed with a UV curable acrylate photopolymer material comprises an alignment layer for aligning nematic polymeric liquid crystal compensator films. The material may also provide an out-of-plane retardation. The segmented, rigid-rod aromatic polyimide-based UV curable acrylate alignment layer, when applied in appropriate thickness, functions as a negative uniaxial C-plate compensator and causes alignment of the nematic liquid crystal molecules. The combination of the retardation provided by the alignment layer and the compensator film deposited on it provides a significant improvement in the contrast and color stability of liquid crystal displays (LCDs) at large viewing angles.
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