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Journal of Display Technology

Journal of Display Technology


  • Vol. 5, Iss. 4 — Apr. 1, 2009
  • pp: 133–137

Study on Frame-Switching Sequence Dependent Disclination Line in Active Matrix LCD

Yu-Chieh Cho and Alan Lien

Journal of Display Technology, Vol. 5, Issue 4, pp. 133-137 (2009)

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In the course of development, we found that light leakage in the dark state was observed when a thin-film transistor (TFT) driving twisted nematic (TN) liquid crystal display (LCD) was switched in a particular frame-switching sequence. The light leakage in the dark state was caused by the disclination line in the sub-pixel. Further study showed that the disclination line can be eliminated by flattening topology of the inner surface of the cell or by increasing pre-tilt angle of the LC cell.

© 2009 IEEE

Yu-Chieh Cho and Alan Lien, "Study on Frame-Switching Sequence Dependent Disclination Line in Active Matrix LCD," J. Display Technol. 5, 133-137 (2009)

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  1. A. Lien, R. A. John, "Lateral field effect in 90$^\circ$ TN cells," IBM J. Res. Develop. 36, 51-51 (1992).
  2. A. Lien, "Simulation of three-dimensional director structures in twisted nematic liquid crystal displays," Appl. Phys. Lett. 62, 1079-1079 (1993).
  3. B. Bahadur, Liquid Crystal: Applications and Uses (World Scientific, 1992).

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