Investigation of electro-optical characteristics of photo-aligned TN-LCDs on PCEMA surfaces |
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| Authors: | Jeoung-Yeon Hwang Dae-Shik Seo Obom Kwon Dong Hack Suh Eun-Joo Hahn |
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| Institution: | 1. Dept. of Electrical and Computer Engineering, College Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-ku, Seoul 120-749, Korea;2. Dept. of Industrial Chemistry, Hanyang University, 17 Hangdang-dong, Seongdong-ku, Seoul 133-791, Korea;3. Dept. of Physics, The University of Suwon, Kyungki 445-743, Korea |
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| Abstract: | In this work, a novel photo-alignment material, poly(cinnamolyethyl methacrylate) (PCEMA), was synthesized by photo-dimerization. We investigated the electro-optical characteristics of twisted nematic (TN)-liquid crystal displays (LCDs) photo-aligned with linearly polarized UV light irradiation at normal direction on the PCEMA surfaces. Excellent voltagetransmittance characteristics were observed. The threshold voltage of the photo-aligned TN-LCD decreases with increasing UV irradiation time. Additionally, response times are almost the same as for a rubbing-aligned TN-LCD. |
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