Control of High Pretilt Angle for Nematic Liquid Crystal of Negative Dielectric Anisotropy on Blending Polymer Surfaces

복합 폴리머 표면에서의 부의 유전율을 가진 네마틱액정의 고프리틸트각 제어

  • 황정연 (연세대학교 전기전자공학과) ;
  • 서대식 (연세대학교 전기전자공학과) ;
  • 남상회 (인제대학교 의용공학과)
  • Published : 2001.12.01


The control of high pretilt angle for nematic liquid crystal (NLC) with negative dielectric anisotropy on the rubbed blending polyimide (PI) of homeotropic and homogeneous alignment surface was studied. High LC pretilt angle on the rubbing blending polyimide of homeotropic PI and SE-7492 surface was measured and the LC pretilt angle increased wish blending ratio and rubbing strength. However, the low LC pretilt angle on the rubbed blending polyimide of homeotropic PI and SE-150 surface was measured. The high pretilt angle of NLC can be achieved by using the blending PI surface.


  1. Mol. Cryt. Liq. Cryst. v.259 Pretilt angle of nematic liquid crystals on organic solvent soluble polyimide M.Nishikawa;K.Sano;T.Miyamoto;Y.Yokoyama;N.Bessho;D.S.Seo;Y.Iimura;S.Kobayashi
  2. Liquid Crystals v.14 Correlations between surface and bulk liquid crystal alignment observed with optical second-harmonic generation M.Barmentlo;R.W.J.Hollering;N.A.J.M.Van aerle
  3. Liquid Crystals v.17 A population distribution model for the alignment of nematic liquid crystals B.O.Myrvold;K.Kondo
  4. Mol. Cryst. Liq. Cryst. v.213 Generation of pretilt angle in nematic liquid crystal, 5CB, media aligned polyimide films prepared by spin-coating and LB techniques:effect of rubbing D.S.Seo;K.Muroi;S.Kobayashi
  5. Jpn. J. Appl. Phys. v.33 Effects of conjugation of mesogenic core of nematic liquid crystals for polar anchoring energy and surface order parameter on rubbed polyimide films D.S.Seo;N.Yoshida;S.Kobayashi;M.Nishikawa;Y.Yabe
  6. Journal of Electrical and Electronic Materials v.3 no.1 Investigation of anisotropic dispersion force effects for liquid crystal alignment on unidirectionally rubbed polystyrene surfaces D.S.Seo;B.H.Lee
  7. Journal of Electrical and Electronic Materials v.11 no.12 Effects of surface order parameter on poiar anchoring energy in NLC on weakly rubbed polymide surface D.S.Seo
  8. Transactions on Electrical and Electronic Materials v.1 Liquid crystal alignment effects for the photo-aligned VA-LCD on the photo-polymer J.Y.Hwang;D.S.Seo;E.J.Hahn;J.H.Kim
  9. Jpn. J. Appl. Phys. v.39 Pretilt angles of vertically aligned nematic liquid crystal (NLC) with the application of copolymers possessing chalconyl and cholesteryl moiety J.Y.Hwang;D.S.Seo;J.H.Son;D.H.Suh