Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Generation of High Pretilt Angle in Liquid Crystal Cell with Slanted Non-Polarized Ultraviolet Light Irradiation on Polyimide Film as for Non-Rubbing Techniques

경사진 자외선을 폴리이미드막 표면에 조사한 넌러방법에 의한 액정소자의 고 프리틸트각의 발생

  • Seo, Dae-Shik (Department of Electrical Engineering, College of Engineering, Soongsil University) ;
  • Hwang, Lyul-Yeon (Department of Electrical Engineering, College of Engineering, Soongsil University) ;
  • Lee, Bo-Ho (Department of Electrical Engineering, College of Engineering, Soongsil University)
  • 서대식 (숭실대학교 공과대학 전기공학과) ;
  • 황율연 (숭실대학교 공과대학 전기공학과) ;
  • 이보호 (숭실대학교 공과대학 전기공학과)
  • Published : 1997.07.21
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Abstract

We investigated the generation of high pretilt angle for nematic liquid crystal (NLC) in the cell with slanted non-polarized ultraviolet (UV) light irradiation on two kinds of the polyimide (PI) film. It was shown that the monodomain alignment in NLC is obtained in the cell with slanted non-polarized UV light irradiation on PI surface. The pretilt angle of NLC is generated about 3 degrees in the cell with slanted non-polarized UV light irradiation with 70 degrees on PI surface without side chain. But, the pretilt angle of NLC is generated about 1 degree in the cell with slanted non-polarized UV light irradiation with 80 degrees on PI surface with side chain. We consider that the pretilt angle generation in NLC is attributted to anisotropic dispersion force between the LC molecular and the PI surface.

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