OSA's Digital Library

Journal of Display Technology

Journal of Display Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 3, Iss. 3 — Sep. 1, 2007
  • pp: 259–265

Determining the Liquid-Crystal Polar Anchoring at High Electric Fields by Heterodyne Interferometer

Shug-June Hwang, Hsin Her Yu, and Min-Hua Hsu

Journal of Display Technology, Vol. 3, Issue 3, pp. 259-265 (2007)


View Full Text Article

Acrobat PDF (710 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations
  • Export Citation/Save Click for help

Abstract

A common-path heterodyne interferometer is proposed to determine the surface anchoring energy of a homogeneously aligned nematic liquid crystal (LC). This technique measures, with high sensitivity, the phase retardation of a nematic LC cell as a function of the applied voltage. According to the measured voltage-dependent phase retardation of the LC cells, a simple linear fitting over a well-specified voltage window can be achieved, leading to a precise determination of the polar anchoring energy. The anchoring energy Wa, cell gap, and pretilt angle can be simultaneously obtained in the course of the same experiment.

© 2007 IEEE

Citation
Shug-June Hwang, Hsin Her Yu, and Min-Hua Hsu, "Determining the Liquid-Crystal Polar Anchoring at High Electric Fields by Heterodyne Interferometer," J. Display Technol. 3, 259-265 (2007)
http://www.opticsinfobase.org/jdt/abstract.cfm?URI=jdt-3-3-259


Sort:  Year  |  Journal  |  Reset

References

  1. H. Yokoyama, H. A. Van Sprang, "A novel method for determining the anchoring energy function at a nematic liquid crystal-wall interface from director distortions at high fields," J. Appl. Phys 57, 4520-4526 (1985).
  2. H. Yokoyama, R. Sun, "Simplified high-electric-field technique for measuring the liquid crystal anchoring strength," Jpn. J. Appl. Phys. 39, L45-L47 (2000).
  3. S. Okutani, M. Kimura, T. Akahane, "Analysis of liquid crystal orientation at interface between liquid crystal and alignment film by total reflection ellipsometry," Jpn. J. Appl. Phys. 37, L600-L602 (1998).
  4. M. Vilfan, A. Mertelj, "Dynamic light scattering measurements of azimuthal and zenithal anchoring of nematic liquid crystals," Phys. Rev. E 65, 041712-1-041712-7 (1995).
  5. D. Subacius, V. M. Pergamenshcchik, O. D. Lavernovich, "Measurement of polar anchoring coefficient for nematic cell with high pretilt angle," Appl. Phys. Lett. 67, 214-216 (1995).
  6. Y. A. Nastishin, R. D. Polak, S. V. Shiyanovskii, "Determination of nematic polar anchoring from retardation versus voltage measurements," Appl. Phys. Lett. 75, 202-204 (1999).
  7. Y. A. Nastishin, R. D. Polak, S. V. Shiyanovskii, V. H. Bodnar, O. D. Lavrentovich, "Nematic polar anchoring strength measured by electric field techniques," J. Appl. Phys. 86, 4199-4213 (1999).
  8. T. Akahane, "The influence of multiple-beam interference in a liquid crystal cell on the determination of the optical retardation and the twist angle," Jpn. J. Appl. Phys. 37, 3428-3425 (1998).
  9. A. Lien, H. Takano, "Cell-gap measurement of filled twisted nematic liquid crystal displays by a phase compensation method," J. Appl. Phys. 69, 1304-1309 (1991).
  10. S. H. Lee, W. S. Park, G. D. Lee, K. Y. Han, T. H. Yoon, J. C. Kim, "Low-cell-gap measurement by rotation of a wave retarder," Jpn. J. Appl. Phys. 41, 379-383 (2002).
  11. Y. W. Li, H. S. Kwok, "LCD pretilt angle measurement using QHQ compensation method," Proc. 6th Chinese Symp. Optoelectron. (2003) pp. 235-236.
  12. S. J. Hwang, "Precise optical retardation measurement of nematic liquid crystal display using the phase-sensitive technique," J. Display. Technol. 1, 72-76 (2005).
  13. I. C. Khoo, S. T. Wu, Optics and Nonlinear Optics of Liquid Crystals (World Scientific, 1993) pp. 148-158.
  14. S. J. Hwang, S. T. Lin, C. H. Lai, "A novel method to measure the cell gap and pretilt angle of a reflective liquid crystal display," Opt. Commun. 260, 614-620 (2006).
  15. T. Sugiyama, S. Kuniyasu, D. Seo, H. Fukuro, S. Kobayashi, "A simple model for pretilted nematic liquid crystal medium and its torsional surface coupling strength," Jpn. J. Appl. Phys. 29, 2045-2051 (1990).

Cited By

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.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited