DOI QR코드

DOI QR Code

Effect of Electric field on an Injection Velocity in a Vertically Aligned Nematic Liquid Crystal

수직배향 네마틱 액정셀에서의 주입속도에 미치는 전기장 효과

  • 전연문 (전북대학교 고분자 BIN 융합연구 산업팀) ;
  • 김상균 (전북대학교 고분자 BIN 융합연구 산업팀) ;
  • 김연식 (전북대학교 고분자 BIN 융합연구 산업팀) ;
  • 안명환 (전남대학교 정보소재공학과) ;
  • 이승희 (전북대학교 고분자 BIN 융합연구 산업팀)
  • Published : 2006.07.01

Abstract

Injection time of liquid crystal (LC) by capillary action in a vertically aligned (VA) nematic LC cell takes longer than that in a homogeneously aligned (HA) LC cell because Miesowicz viscosity in the former is bigger than that in the latter. To reduce liquid crystal injection time in the VA cell, we applied vertical electric field while injecting so that the orientation of LC molecules is changed from vertical alignment to homogeneous alignment. Consequently, the injection speed is improved by 25 % when compared with the cell without an applied field.

Keywords

References

  1. S. H. Lee, S. H. Hong, J. M. Kim, H. Y. Kim, and J. Y. Lee, 'An overview of product issues in wide-viewing TFT-LCDs', Journal of the SID, Vol. 9, No.3, p. 155, 2001
  2. M. Oh-e and K. Kondo, 'Electro-optical characteristics and switching behavior of the in-plane switching mode', Appl. Phys, Lett., Vol. 67, p. 3895, 1995 https://doi.org/10.1063/1.115309
  3. S. H. Lee, S. L. Lee, and H. Y. Kim, 'Electro-optic characteristics and switching principle of a nematic liquid crystal cell controlled by fringe-field switching', Appl. Phys. Lett., Vol. 73, p. 2881, 1998 https://doi.org/10.1063/1.122617
  4. M. S. Kim, Y. H. lung, H. Y. Kim, S. Y. Kim, and S. H. Lee, 'Study on electrooptic characteristics and dynamic stability depending on the pretilt angle for the twisted nematic(TN) and fringe-field switching (FFS) mode', Journal of the KIEEME, Vol. 17, No. 11, p. 1234, 2004
  5. A. Takeda, S. Kataoka, T. Sasaki, H. Chida, H. Tsuda, K. Ohmuro, T. Sasabayashi, Y. Koike, and K. Okamoto, 'A Super-high-image Quality Multi-domain Vertical Alignment LCD by New Rubbing-less Technology', SID 98 Digest, p. 1077, 1998
  6. K. H. Kim, K. Lee, S. B. Park, J. K. Song, S. Kim, and J. H. Souk, 'Domain divided vertical alignment mode with optimized fringe field effect', Proceedings of Asia Display 98, p. 383, 1998
  7. H. Kamiya, K. Tajima, K. Toriumi, K. Terada, H. Inoue, T. Yokoue, N. Shimizu, T. Kobayashi, S. Odahara, G. Hougham, C. Cai, J. H. Glownia, R. J. von Gutfeld, R. John, and S-C. A. Lien, 'Development of One Drop Fill Technology for AM-LCDs', SID 01 Digest, p. 1354, 200l
  8. M. Miesowicz, 'Influence of a magnetic field on the viscosity of para-azoxyanisole', Nature, Vol. 136, p. 261, 1936
  9. M. Miesowicz, 'The three coefficients of viscosity of anisotropic liquids', Nature, Vol. 158, p. 27, 1946
  10. H. Ehrentraut and S. Hess, 'Viscosity coefficients of partially aligned nematic and nematic discotic liquid crystals', Phys. Rev. E, Vol. 51, No.3, p. 2203, 1995