Transactions on Electrical and Electronic Materials

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Liquid crystal alignment effects for the photo-aligned VA-LCD on the photo-polymer

  • Hwang, Jeoung-Yeon (Dept. of Electrical & Electronic Eng. College Eng, Yonsel, University.) ;
  • Seo, Dae-Shik (Dept. of Electrical & Electronic Eng. College Eng, Yonsel, University.) ;
  • Hahn, Eun-Joo (Dept, of physics, The University of Suwon, Kyungki) ;
  • Kim, Jae-Hyung (Department of Physics, Inje University, Kimhase, Kyungnam)
  • Published : 2000.09.01
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Abstract

In this study the new photo-alignment material copoly(PM4Ch-ChMa)(copoly (poly (4-methancryloyloxy)chalcone-cholesteryl methacry late)) was synthesized, Also, the liquid crystal (LC) aligning capabilities and the electro-optical(EO) characteristics for the photo-aligned vertical-aligned(VA)-LC display(LCD) were studied. The monodomain alignment of the NLC for the photo-aligned VA-LCD by linearly polarized UB exposure on the Photo-dimerized copoly(PM4Ch-ChMA) surface was observed,. Excellent Voltage-transmittance characteristics for the VA-LCD photo-aligned by polarized UV exposure on the copoly (PM4Ch-ChMA) surfaces for 1 min was achieved. The response time of the VA-LCD photo-aligned by polarized UV exposure on the copoly (PM4Ch-ChMA) surfaces for 1 min was 39.3 ms, We suggest that the photo-dimerized chacone group increased with increasing UV exposure time, which then contributes to a low response time of the photo-aligned VA-LCD on the copoly (PM4Ch-ChMA) surfaces.

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