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A Study on Electro-optical Characteristics Dependent on Surface Anchoring Energy in the Fringe-field Switching Mode

FFS 모드에서 표면 엥커링에너지에 따른 전기광학특성의 연구

  • 유인호 (전북대학교 신소재공학부) ;
  • 총첸신 (전북대학교 신소재공학부) ;
  • 장원근 (한국과학기술원 카메라모듈팀) ;
  • 이명훈 (전북대학교 신소재공학부) ;
  • 이승희 (전북대학교 신소재공학부)
  • Published : 2005.11.01

Abstract

Liquid crystal (LC) alignment using a photoalignment method by irradiation of polarized ultraviolet (UV) on an alignment layer has been investigated. Photoalignment method exhibits weaker anchoring energy than rubbing method so that we have studied electro-optic characteristics of fringe-field switching (FFS) mode with alignment layers using the photo and rubbing alignment methods. The cell using photo alignment layer shows lower threshold and operation voltage than those using rubbed alignment layer. Also, the former method shows higher transmittance than that of the latter.

Keywords

References

  1. M. Schadt, K. Schmitt, V. Kozinkov, and V. Chigrinov, 'Surface-induced parallel alignment of liquid crystals by linearly polarized photopolymers', Jpn. J. Appl. Phys., Vol. 31, No.7, p, 2155, 1992
  2. M. Hasegawa and Y. Taira, 'Nematic homogeous alignment by photo depolyrneriza tion of polyimide', SID'94, p. 213, 1994
  3. M. Nishikawa, B. Taheri, and J. L. West, 'Polyimide films designed to produced high pretilt angles with a single linearly polarized UV exposure', SID'98, p. 131, 1998
  4. 서대식, 이정호, 이충훈, '폴리이미드막 표면에 직선 평광된 UV 광 조사에 의한 프리틸트각 발생과 전기광학특성', 전기전자재료학회논문지, 11권, 10호, p. 911, 1998
  5. S. H. Lee, S. M. Lee, H. Y. Kim, J. M. Kim, S. H. Hong, Y. H. Jeong, C. H. Park, Y. J. Choi, J. Y. Lee, J. W. Koh, and H. S. Park, '18.1 inch Ultra TFT-LCD with super image quality and fast response time', SID'01, p. 484, 2001
  6. 김미숙, 김향율, 이승희, 'Fring-field switching(FFS) 모드에서 액정의 유전을 이방성을 따른 동력학 안정성에 관한 연구'; 전기전자재료학회논문지, 16권, 3호, p. 224, 2003
  7. S. H. Jung, T. B. Jung, M. S. Kim, S. T. Oh, and S. H. Lee, 'Electro-optic characteristics of the FFS mode depending on surface anchoring energy', KLCC'02, p. 119, 2002
  8. M. Yoneya, K. Iwasaki, Y. Tomioka, and K. Kondo, 'Cell gap margin enlargement of in-plane switching mode liquid crystal displays using weak-anchoring effects', Appl. Phys. Lett., Vol. 74, No.6, p. 803, 1999
  9. A. Lien, 'Extended Jones matrix representation for twisted nematic liquid crystal display at oblique incidence', Appl. Phys. Lett., Vol. 57, No. 26, p. 2767, 1990
  10. M.-H. Lee, X. Li, W. C. Kim, S. H. Lee, and H. J. Cha, 'A new polyimide with multifunction of alignment and planarization', Mol. Cryst, Liq. Cryst., Vol. 411, p. 407, 2004