Abstract
ABSTRACT A new fabrication method and its monomer for a polymer-sustained-alignment liquid-crystal (PSA-LC) cell was proposed in this study. The proposed process for formation of a polymer layer is a method to expose visible light for polymerisation of the monomers. As the visible light, a LED-backlight of a LC display (LCD) was used through the intermediary of a polariser. Therefore, the polymer layer was formed by the exposure of the LED-backlight after construction of the LCD. The proposed monomer is 4,4ʹ-dimethacryloyl-oxy-benzil, which can generate a radical by a hydrogen abstraction reaction for an initiation of the polymerisation under exposure of the visible light. The fabricated PSA-LC cell with the proposed method showed high voltage holding ratio, low residual direct current voltage, and comparably small difference in pretilt angle before and after application of an alternate current voltage. Therefore, we can expect that the PSA-LCD would be fabricated without the exposure process of the UV light. Moreover, the PSA-LCD fabricated by the proposed method would be a small level of image sticking.
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