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AssigneeKorea Advanced Institute of Science and Technology
InventorsJung-Ki Park, Hee-Tak Kim, Jong-Woo Lee, Shi-Joon Sung
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The present invention relates to a polymer blend of cinnamate polymer and polyimide polymer, which are photo-reactive polymers, for preparing liquid crystal alignment layer having a high pretilt angle in photo-alignment, a process for preparing liquid crystal alignment layer by employing the said blend, a liquid crystal alignment layer prepared by the process, and a crystal cell prepared by employing the liquid crystal alignment layer. The polymer blend for preparing liquid crystal alignment layer of the invention comprises 10 to 90% (w/w) of cinnamate polymer and 10 to 90% (w/w) of polyimide polymer. Since the liquid crystal alignment layer prepared by employing the polymer blend of the invention has an excellent alignment property and thermal stability, which makes possible its wide application in the development of liquid crystal displays.
A polymer blend for use in a liquid crystal alignment layer, the polymer blend comprising 10 to 90 wt % of at least one cinnamate polymer and 10 to 90 wt % of at least one polyimide polymer, wherein each amount of the cinnamate polymer and polyimide polymer is based on a total amount of the cinnamate and polyimide polymers, and wherein the cinnamate polymer is selected from the group consisting of polyvinylfluorocinnamate, polyvinylalkoxyfluorocinnamate, and copolymers of the foregoing polymers.
A process for preparing a liquid crystal alignment layer, the process comprising:
Dependencies are inferred from the claim text.