Journal of Information Display

  • 제9권2호
  • /
  • Pages.22-27
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  • 2008
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  • 1598-0316(pISSN)
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  • 2158-1606(eISSN)
한국정보디스플레이학회 (The Korean Infomation Display Society)
권호 표지

An Optical Configuration for Vertical Alignment Liquid Crystal cell with Wide Viewing Angle

  • Ji, Seung-Hoon (Dept. of Electronics Engineering, Dong-A University) ;
  • Lee, Gi-Dong (Dept. of Electronics Engineering, Dong-A University)
  • 발행 : 2008.06.30
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초록

We propose an optical configuration of a vertical alignment (VA) liquid crystal (LC) cell to eliminate the light leakage in the diagonal direction. VA LC cell has an excellent contrast ratio in the normal direction due to the no phase-retardation. However, change of the phase-retardation occurs in all directions, which causes the light leakage and deteriorates the characteristics of the dark state. We designed the LC cell structure composed of multiple combinations with two A-plates and two C-plates in order to achieve wide viewing property on the Poincare sphere. From calculations, we show that the proposed structure can improve the viewing angle characteristics by compensating for the light leakage in all directions.

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참고문헌

  1. Y. Yamaguchi, T. Miyashita, and T. Uchida, in SID Digest (1993), p. 277
  2. M. Oh-e, and K. Kondo, Appl. Phys. Lett. 67, 3895 (1995) https://doi.org/10.1063/1.115309
  3. S. H. Lee, S. L. Lee, and H. Y. Kim, Appl. Phys. Lett. 73, 2881 (1998) https://doi.org/10.1063/1.122617
  4. K. H. Kim, K. Lee, S. B. Park, J. K. Song, S. N. Kim, and J. H. Souk, in Asia Display (1998), p. 383
  5. P. Yeh, and C. Gu, Optics of Liquid Crystal Displays (John Wiley & Sons, New York, 1999), Ch. 8
  6. Vermerisch K, De Meyere A, Fornier J, and De Vleeschouwer H, Appl. Opt., 38, 2775 (1999) https://doi.org/10.1364/AO.38.002775
  7. D.-K. Yang, and S.-T. Wu, Fundamentals of Liquid Crystal Devices (John Wiley & Sons, New York, 2006), Ch. 8
  8. Bigelow J E, and Kashnow R A, Appl. Opt. 16, 2090 (1977) https://doi.org/10.1364/AO.16.002090
  9. Goldstein D., Polarized Light (Basel , New York, 2003), Ch. 5