Journal of Information Display

The Korean Infomation Display Society (한국정보디스플레이학회)
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Liquid crystal alignment on patterned-alignment films

  • Lias, Jais Bin (Department of Electrical Engineering, Faculty of Engineering, Nagaoka University of Technology) ;
  • Oo, Thet Naing (Institute for Materials Chemistry and Engineering, Kyushu University) ;
  • Yazawa, Tomohiro (Department of Electrical Engineering, Faculty of Engineering, Nagaoka University of Technology) ;
  • Kimura, Munehiro (Department of Electrical Engineering, Faculty of Engineering, Nagaoka University of Technology) ;
  • Akahane, Tadashi (Department of Electrical Engineering, Faculty of Engineering, Nagaoka University of Technology)
  • Received : 2011.02.07
  • Accepted : 2011.02.21
  • Published : 2011.06.30
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Abstract

To come up with a bistable liquid crystal (LC) device using unpolarized UV light, single-step laser patterning on a photoalignment layer using a photomask was proposed to achieve an equilibrium configuration of LC molecules in contact with a periodically patterned substrate. The patterns were formed by stripes of alternating random planar and homeotropic anchoring on a submicrometer scale in the order of $0.5{\mu}m$. Two possible configurations of bistable LC cells that can be obtained by combining a micropatterned surface formed with alternating random-planar- and homeotropic-alignment with planar- or homeotropic-alignment surfaces were proposed. The alignment properties of the two proposed models were investigated, along with the microscopic switching behavior of micropatterned nematic LC cells.

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