DOI QR코드

DOI QR Code

Authentic-color Characteristic of the Fringe-field Switching Mode using a Liquid Crystal with Negative Dielectric Anisotropy

유전율 이방성이 음인 액정을 이용한 Fringe-field Switching Mode의 Authentic-color 특성

  • 송제훈 (전북대학교 신소재공학부) ;
  • 최윤석 (전북대학교 신소재공학) ;
  • 문대규 (전자부품연구원 디스플레이연구센) ;
  • 한정인 (전자부품연구원 디스플레이연구센) ;
  • 이승희 (전북대학교 신소재공학부)
  • Published : 2004.06.01

Abstract

We have studied color tracking of a fringe-field driven homogenously aligned nematic liquid crystal (LC) cell with negative dielectric anisotropy and compared it with other devices such as the twisted nematic(TN) and in-plane switching(IPS) modes. According to studies, the TN device shows bluish color at grey scale and even at a low retardation cell it cannot avoid color tracking. The authentic IPS device having cell retardation value of 0.23 ${\mu}{\textrm}{m}$ also shows bluish white color. However, the FFS device shows excellent color tracking characteristics even at high retardation value of the cell while keeping high transmittance and greenish white.

References

  1. 장진, '액정디스플레이 기술의 발전 전망', 전기전자재료학회지 9권 7호, p. 745, 1996
  2. Y. Utsumi, S. Komura, Y. Toyoda, and K. Kondo, 'Color tracking in relation to liquid crystal display characteristics', IDW'01, p. 117, 2001
  3. 서대식, 이승희, 'LCD의 액정배향 및 광시야각 기술의 개발현황', 전기전자재료학회지, 11권, 1호, p. 20, 1998
  4. M. OH-E, M. Yoneya, M. Ohta, and K. Kondo, 'Depending of viewing angle characteristics on pretilt angle in the in-plane switching mode', Liquid Crystals., Vol. 22, No.4, p. 391, 1997 https://doi.org/10.1080/026782997209108
  5. S. H. 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. 57, No. 20, p. 2881, 1998
  6. S. H. Lee, H. Y. Kim, S. M. Lee, S. H. Hong, J. M. Kim, J. W. Koh, J. Y. Lee, and H. S. Park. 'Ultra-FFS TFT-LCD with super image quality, fast response time, and strong pressure-resistant characteristics', SID'01 Digest, p. 117, 2001
  7. 김미숙, 김향율, 이승희, '"Fring-field switching(FFS)모드에서 액정의 유전율 이방성에 따른 동역학 안정성에 관한 연구', 전기전자재료학회지, 16권 3호, p. 224, 2003
  8. 정송희, 김향율, 이종문, 이승희, '유전율 이방성이 음인 액정을 이용한 fringe field switching mode의 cell gap 변화에 따른 전기 광학 특성', 전기전자재료학회지, 16권, 10호, p. 914, 2003
  9. N. Moruya, T. Uchida, and T. Honda 'Novel transmissive color filter using cholesteric liquid crystal with wide viewing angle', IDW'00, p. 347, 2000
  10. Y. Utsumi, I. Hiyama, S. Komura, M. Makoto, and K. Kondo, 'Development of authentic color IPS LCD without color tracking', SID'02 Digest, p. 820, 2002
  11. A. Lien, 'Extended Jones matrix representation for twisted nematic liquid crystal display at oblique incidence', Appl. Phys. Lett., 57. p. 2767, 1990 https://doi.org/10.1063/1.103781