Compositions – Liquid crystal compositions – Containing nonchiral aligning agents
Reexamination Certificate
2008-12-05
2011-11-15
Wu, Shean (Department: 1722)
Compositions
Liquid crystal compositions
Containing nonchiral aligning agents
C428S001200, C428S001250, C428S001260, C349S123000
Reexamination Certificate
active
08057700
ABSTRACT:
One embodiment of the present invention provides a liquid crystal photo-alignment agent that includes a polyamic acid copolymer including a repeating unit having the following Formula 1 and a repeating unit having the following Formula 2; a polyimide copolymer including a repeating unit having the following Formula 3 and a repeating unit having the following Formula 4; or a combination thereof:wherein the definition of R1 to R8 are the same as in the specification. The liquid crystal photo-alignment agent can have improved liquid crystal alignment properties, electrical characteristics such as voltage holding ratio, pretilt angle, residual DC, and the like, printability, cleaning stability, and spot stability, and is capable of unidirectionally aligning liquid crystals by ultraviolet (UV) exposure.
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Kwak Tae-Hyoung
Oh Jae-Min
Uh Dong-Seon
Yang Jae-Deuk
Cheil Industries Inc.
Summa Addition & Ashe, P.A.
Wu Shean
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