Abstract

The response time and contrast of vertically-aligned negative nematics depend critically on the aligning surface and its induced pretilt. Pretilt can be tuned up using obliquely evaporated inorganic oxides as alignment surface.A thorough study of pretilt angles induced by aligning surfaces of thermally evaporated ${\hbox{SiO}}_{x}$ has been carried out on several commercial and experimental negative nematic mixtures. Morphology of ${\hbox{SiO}}_{x}$ with different evaporation angles has been studied by Field Emission Scanning Electron Microscopy. Some morphological variations appear at specific evaporation angles. These are related to the pretilt induced by the surface and to the dynamic response of the device.

© 2010 IEEE

PDF Article

References

  • View by:
  • |
  • |

  1. J. J. Lyu, J. Sohn, H. Y. Kim, S. H. Lee, "Recent trends on patterned vertical alignment (PVA) and fringe-field switching (FFS) liquid crystal displays for liquid crystal television applications," J. Display Technol. 3, 404-412 (2007).
  2. W. Shin, T. Won, C. Lee, "Multi-domain PVA LCD cell: Pros and cons," Mol. Cryst. Liquid Cryst. 476, 433-441 (2007).
  3. S. Choi, J. Hwang, S. Kim, B. Oh, J. Myoung, D. Seo, "Liquid crystal alignment and electrooptical characteristics of vertical alignment liquid crystal display on ${\hbox{SiO}}_{x}$ thin film obliquely deposited by sputtering," Jpn. J. Appl. Phys. 45, 1280-1282 (2006).
  4. C. Chen, P. J. Bos, J. Kim, Q. Li, J. E. Anderson, "Improved liquid crystals for vertical alignment applications," J. Appl. Phys. 99, 123523-123523 (2006).
  5. P. K. Son, J. H. Park, S. S. Cha, J. C. Kim, T. H. Yoon, "Vertical alignment of liquid crystal on a-${\hbox{SiO}}_{x}$ thin film using the ion beam exposure," Appl. Phys. Lett. 88, 263512-263512 (2006).
  6. P. J. Martin, A. Bendavid, C. Comte, H. Miyata, Y. Asao, Y. Ishida, A. Sakai, "Alignment and switching behaviors of liquid crystal on a-${\hbox{SiO}}_{x}$ thin films deposited by a filtered cathodic arc process," Appl. Phys. Lett. 91, 063516.
  7. X. Quintana, M. A. Geday, B. Cerrolaza, D. Pérez-Medialdea, J. M. Otón, "Measurement of pretilt angle and cell gap in reflective vertically aligned nematics," 2007 Spanish Conf. on Electron Devices Proc. (2007) pp. 258-261.
  8. A. Marino, E. Santamato, N. Bennis, X. Quintana, J. M. Otón, V. Tkachenko, G. Abbate, "Ellipsometric study of vertically aligned nematic liquid crystals," Appl. Phys. Lett. 94, 013508-013508 (2009).
  9. S. Kondoh, "Ultra high-resolution FLC display for PDA," Displays 25, 31-36 (2004).
  10. P. J. M. Vanbrabant, N. D. y. J. F. Strömer, "Temperature influence on the dynamics of vertically aligned liquid crystal displays," Appl. Phys. Lett. 92, 091101-091101 (2008).

2009 (1)

A. Marino, E. Santamato, N. Bennis, X. Quintana, J. M. Otón, V. Tkachenko, G. Abbate, "Ellipsometric study of vertically aligned nematic liquid crystals," Appl. Phys. Lett. 94, 013508-013508 (2009).

2008 (1)

P. J. M. Vanbrabant, N. D. y. J. F. Strömer, "Temperature influence on the dynamics of vertically aligned liquid crystal displays," Appl. Phys. Lett. 92, 091101-091101 (2008).

2007 (2)

2006 (3)

S. Choi, J. Hwang, S. Kim, B. Oh, J. Myoung, D. Seo, "Liquid crystal alignment and electrooptical characteristics of vertical alignment liquid crystal display on ${\hbox{SiO}}_{x}$ thin film obliquely deposited by sputtering," Jpn. J. Appl. Phys. 45, 1280-1282 (2006).

C. Chen, P. J. Bos, J. Kim, Q. Li, J. E. Anderson, "Improved liquid crystals for vertical alignment applications," J. Appl. Phys. 99, 123523-123523 (2006).

P. K. Son, J. H. Park, S. S. Cha, J. C. Kim, T. H. Yoon, "Vertical alignment of liquid crystal on a-${\hbox{SiO}}_{x}$ thin film using the ion beam exposure," Appl. Phys. Lett. 88, 263512-263512 (2006).

2004 (1)

S. Kondoh, "Ultra high-resolution FLC display for PDA," Displays 25, 31-36 (2004).

Appl. Phys. Lett. (4)

P. K. Son, J. H. Park, S. S. Cha, J. C. Kim, T. H. Yoon, "Vertical alignment of liquid crystal on a-${\hbox{SiO}}_{x}$ thin film using the ion beam exposure," Appl. Phys. Lett. 88, 263512-263512 (2006).

P. J. Martin, A. Bendavid, C. Comte, H. Miyata, Y. Asao, Y. Ishida, A. Sakai, "Alignment and switching behaviors of liquid crystal on a-${\hbox{SiO}}_{x}$ thin films deposited by a filtered cathodic arc process," Appl. Phys. Lett. 91, 063516.

A. Marino, E. Santamato, N. Bennis, X. Quintana, J. M. Otón, V. Tkachenko, G. Abbate, "Ellipsometric study of vertically aligned nematic liquid crystals," Appl. Phys. Lett. 94, 013508-013508 (2009).

P. J. M. Vanbrabant, N. D. y. J. F. Strömer, "Temperature influence on the dynamics of vertically aligned liquid crystal displays," Appl. Phys. Lett. 92, 091101-091101 (2008).

Displays (1)

S. Kondoh, "Ultra high-resolution FLC display for PDA," Displays 25, 31-36 (2004).

J. Appl. Phys. (1)

C. Chen, P. J. Bos, J. Kim, Q. Li, J. E. Anderson, "Improved liquid crystals for vertical alignment applications," J. Appl. Phys. 99, 123523-123523 (2006).

J. Display Technol. (1)

Jpn. J. Appl. Phys. (1)

S. Choi, J. Hwang, S. Kim, B. Oh, J. Myoung, D. Seo, "Liquid crystal alignment and electrooptical characteristics of vertical alignment liquid crystal display on ${\hbox{SiO}}_{x}$ thin film obliquely deposited by sputtering," Jpn. J. Appl. Phys. 45, 1280-1282 (2006).

Mol. Cryst. Liquid Cryst. (1)

W. Shin, T. Won, C. Lee, "Multi-domain PVA LCD cell: Pros and cons," Mol. Cryst. Liquid Cryst. 476, 433-441 (2007).

Other (1)

X. Quintana, M. A. Geday, B. Cerrolaza, D. Pérez-Medialdea, J. M. Otón, "Measurement of pretilt angle and cell gap in reflective vertically aligned nematics," 2007 Spanish Conf. on Electron Devices Proc. (2007) pp. 258-261.

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.