Abstract
The photosensitive polyimide(PI) films and silane thin film containing chalcone derivative [4-n-propyl-4- (3-propylene hydroxide) chalcone] induced orientation of liquid crystal, which aligned perpendicular to the polarization direction. Chalcone was attached to PI film and silane thin film by surface modification. The anisotropy of alignment layer was induced by irradiating linearly polarized UV(LPUV). The pretilt angle of nematic liquid crystal cells aligned by those films was about 1 °. The photoaligned films were applied for the alignment of antiferroelectric liquid crystal(AFLC) molecules, which needed planar alignment. The effect of linearly polarized UV light after cell had been fabricated was also investigated.
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