Application of photo-alignment techniques to antiferroelectric liquid crystal cell

Abstract

The photosensitive polyimide (PI) films containing chalcone derivative [4-n-propyl-4-(3-propylene hydroxide)chalcone] induced orientation of liquid crystal, which aligned perpendicular to the polarization direction. The anisotropy of alignment layer was induced by irradiating linearly polarized UV(LPUV). The changes at surface by irradiating of UV tight were measured by SPR. The photoaligned films were applied for the alignment of antiferroelectric liquid crystal (AFLC) molecules, which needed planar alignment. By measuring the dielectric constants of AFLC molecules on the alignment layer, the changes at the AFLC molecules - alignment layer interface were investigated.