OSA's Digital Library

Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 17 — Jun. 10, 2007
  • pp: 3493–3497

Simple parameter determination for twisted nematic liquid-crystal display

Wen-chi Hung, Ming-shan Tsai, Chien-ren Wang, I-min Jiang, and Wood-hi Cheng  »View Author Affiliations

Applied Optics, Vol. 46, Issue 17, pp. 3493-3497 (2007)

View Full Text Article

Enhanced HTML    Acrobat PDF (745 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



A simple and accurate measurement method for determining the cell parameters of a twisted nematic liquid-crystal display (TN-LCD) is proposed. Based on the measurement of the maximum reflectance and the maximum transmittance of a TN-LCD by rotating the polarizer at a particular angle, between the front director of the liquid crystals and the transmission axis of the polarizer, the cell gap and the twist angle can be determined according to the Jones matrix theory, and the twist sense can also be determined easily by applying an external small voltage to slightly change the effective refractive index of the liquid crystal.

© 2007 Optical Society of America

OCIS Codes
(120.2040) Instrumentation, measurement, and metrology : Displays
(120.4630) Instrumentation, measurement, and metrology : Optical inspection
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: October 11, 2006
Revised Manuscript: February 25, 2007
Manuscript Accepted: March 12, 2007
Published: May 18, 2007

Wen-chi Hung, Ming-shan Tsai, Chien-ren Wang, I-min Jiang, and Wood-hi Cheng, "Simple parameter determination for twisted nematic liquid-crystal display," Appl. Opt. 46, 3493-3497 (2007)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. R. Kiefer, B. Webber, F. Windscheid, and G. Baur, "In-plane switching of nematic liquid crystals," Proc. Jpn. Display , 547-550 (1992).
  2. 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 Symp. Digest 1077-1080 (1998). [CrossRef]
  3. H. Kim, J. Song, S. Park, J. Lyu, J. Souk, and K. Lee, "PVA technology for high performance LCD monitors," J. Info. Displays 1, 3-8 (2000).
  4. M. Schadt and W. Helfrich, "Voltage-dependent optical activity of a twisted nematic liquid crystal," Appl. Phys. Lett. 18, 127-128 (1971). [CrossRef]
  5. T. J. Scheffer and J. Nehring, "A new, highly multiplexable liquid crystal display," Appl. Phys. Lett. 45, 1021-1023 (1984). [CrossRef]
  6. C. Mauguin, "Sur les cristaux liquides de Lehmann," Bull. Soc. Fr. Mineral. 34, 71-117 (1911).
  7. C. H. Gooch and H. A. Tarry, "The optical properties of twisted nematic liquid crystal structure with twisted angle 90°," J. Phys. D 8, 1575-1584 (1975). [CrossRef]
  8. K. H. Yang, "Measurements of empty cell gap for liquid-crystal displays using interferometric methods," J. Appl. Phys. 64, 4780-4781 (1988). [CrossRef]
  9. A. Lien and H. Takano, "Cell gap measurement of filled twist nematic liquid crystal displays by a phase compensation method," J. Appl. Phys. 69, 1304-1309 (1991). [CrossRef]
  10. S. T. Tang and H. S. Kwok, "Transmissive liquid crystal cell parameters measurement by spectroscopic ellipsometry," J. Appl. Phys. 89, 80-85 (2001). [CrossRef]
  11. J. S. Chae and S. G. Moon, "Cell parameter measurement of a twist-nematic liquid crystal cell by the spectroscopic method," J. Appl. Phys. 95, 3250-3254 (2004). [CrossRef]
  12. Y. Zhou, Z. He, and S. Sato, Jpn. J. Appl. Phys. , Part 1 36, 2760-2764 (1997). [CrossRef]
  13. J. S. Gwag, S. H. Lee, K.-Y. Han, J. C. Kim, and T.-H. Yoon, "Novel cell gap measurement method for a liquid crystal cell," Jpn. J. Appl. Phys. 41, L79-L82 (2002). [CrossRef]
  14. P. Yeh and C. Gu, Optics of Liquid Crystal Display (Wiley, 1999), Chap. 4.
  15. S.-T. Wu and C.-S. Wu, "Mixed-mode twisted nematic liquid crystal cells for reflective displays," Appl. Phys. Lett. 68, 1455-1457 (1996). [CrossRef]
  16. S. T. Tang and H. S. Kwok, "Measurement of reflective liquid crystal displays," J. Appl. Phys. 91, 8950-8953 (2002). [CrossRef]
  17. W.-K. Choi, "Reflective liquid-crystal cell-gap measurement using input-polarization-angle dependence," SID Symp. Digest 33, 530-533 (2002). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


Fig. 1 Fig. 2 Fig. 3
Fig. 4 Fig. 5

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited