Current Applied Physics

Korean Physical Society (한국물리학회)
권호 표지

Comparison of optical compensations based on discotic liquid crystals with linear and non-linear orientation for wide viewing angle twisted nematic liquid crystal displays

Hwang, Seong-Han;Lim, Young-Jin;Lee, Myong-Hoon;Lee, Seung-Hee;Lee, Gi-Dong;Kang, Hoon;Kim, Kyeong-Jin;Choi, Hyun-Chul

  • Published : 20070900
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Abstract

Optical compensation lm using discotic liquid crystals has been commercialized to suppress light leakage of twisted nematic (TN)liquid crystal (LC) cells in the dark state when the viewing directions are o-axes. In the conventional lm, the tilt angle variation ofthe discotic LC layers is linear, whereas that of the rod-like LC layers in the TN cell is non-linear with twist alignment. We investigatedin a tilt angle or twist and non-twist orientation on TN-LC cells. The results showed that the optical compensation with non-linear ori-entation exhibited an improved performance in suppressing light leakage in the dark state.

Keywords

References

  1. M. Schadt, W. Helfrich, Appl. Phys. Lett. 18 (1971) 127 https://doi.org/10.1063/1.1653593
  2. M. Oh-E, M. Yoneya, M. Ohta, K. Kondo, Liq. Cryst. 22 (1997) 391 https://doi.org/10.1080/026782997209108
  3. N. Koma, Y. Yaba, K. Matsuoka, SID 95 Digest (1995) 869
  4. A. Takeda, S. Kataoka, T. Sasaki, H. Tsuda, K. Ohmuro, Y. Koike, T. Sasabayashi, K. Okamoto, SID 98 Digest (1998) 1077
  5. S.H. Lee, S.L. Lee, H.Y. Kim, Appl. Phys. Lett. 73 (1998) 2881 https://doi.org/10.1063/1.122617
  6. S.H. Hong, I.C. Park, H.Y. Kim, S.H. Lee, Jpn. J. Appl. Phys. 39 (2000) L527 https://doi.org/10.1143/JJAP.39.L527
  7. 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, H.S. Park, SID 01 Digest (2001) 484
  8. H. Takano, S. Suzuki, H. Hatoh, IBM J. Res. Develop. 36 (1992) 23 https://doi.org/10.1147/rd.361.0023
  9. H. Mori, Y. Itoh, Y. Nishiura, T. Nakamura, Y. Shinagawa, Jpn. J. Appl. Phys. 36 (1997) 143 https://doi.org/10.1143/JJAP.36.143
  10. H. Mori, Jpn. J. Appl. Phys. 36 (1997) 1068 https://doi.org/10.1143/JJAP.36.1068
  11. H. Mori, P.J. Bos, SID 98 Digest (1998) 830
  12. H. Mori, J. Display Technol. 1 (2005) 179 https://doi.org/10.1109/JDT.2005.858935
  13. A. Lien, Appl. Phys. Lett. 57 (1990) 2767 https://doi.org/10.1063/1.103781
  14. B. Bahadur, Liquid Crystals - Applications and Uses, vol. 2, World Scientific, Singapore, 1991 (Chapter 8)
  15. S. Aratani, H. Klausmann, M. Oh-E, M. Ohta, K. Ashizawa, K. Yanagawa, K. Kondo, Jpn. J. Appl. Phys. 36 (1996) L27
  16. B.S. Jung, I.S. Baik, I.S. Song, G.-D. Lee, S.H. Lee, Liq. Cryst. 33 (2006) 1077 https://doi.org/10.1080/02678290600930923
  17. H.Y. Kim, G.R. Jeon, D.S. Seo, M.H. Lee, S.H. Lee, Jpn. J. Appl. Phys. 41 (2002) 2944 https://doi.org/10.1143/JJAP.41.2944