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P‐136: Tunable Photosensitivity of Alignment Film for Flexible Liquid Crystal Displays

In this paper, a novel type of photosensitive material used for photoalignment was explored here. After unpolarized ultraviolet light (UV) irradiation in solution, spincoating film with this new material showed fine ability to align liquid crystal (LC) without further exposure. with proper concentration of mixing it to mature azo‐dye photoalignment film explored in our lab, the alignment film could give execellent alignment quality. Furthermore, the photosensitivity of photoalignment film could be tuned up and down in contrast to that with pure azo‐dye material. This result is exciting for flexible liquid crystal displays such as optical rewritable electronic paper (ORW e‐paper), which makes gray scale of device much easier to achieve with photoalignment films existing tunable photosensitivity.