Generation of High Pretilt Angle in a Cell with Oblique non-polarized UV Light Irradiation on Polyimide Surface

폴리이미드막표면위에 경사진 자외선 조사를 이용한 액정셀에서의 고프리틸트각의 발생

  • 서대식 (숭실대학교 공대 전기공학과) ;
  • 한정민 (숭실대학교 공대 전기공학과)
  • Published : 1998.06.01

Abstract

We investigated the generation of high pretilt angle for nematic liquid crystal (NLC) in a cell with obilique non-polarized ultraviolet (UV) light irradiation on mixtured polyimide surface. It was found that the monodomain alignment of NLC is obtained with an angle of incidence of 75∼85 degrees on PI surface. We consider that the monodomain alignment of NLC is attributed to anisotropic dispersion force effect to photo-depolymerization of polymer. We successfully observed that the pretilt angle of NLC is generated above 5 degree with an angle of incidence of 75∼85 degrees. It is considered that the pretilt angle generation NLC is attributed to interaction between the LC molecules and the polymer surfaces.

Keywords

References

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