Pretilt effect on a vertically aligned liquid crystal cell for optical displays

Tkachenko, Volodymyr and Abbate, Giancarlo and Marino, Antigone and Santamato, Enrico and Bennis, Noureddine and Quintana Arregui, Patxi Xabier and Otón Sánchez, José Manuel (2008). Pretilt effect on a vertically aligned liquid crystal cell for optical displays. In: "4th International Conference Advanced Optoelectronics and Lasers (CAOL 2008)", 29/09/2008-04/10/2008. ISBN 978-1-4244-1973-9.

Description

Title: Pretilt effect on a vertically aligned liquid crystal cell for optical displays
Author/s:
  • Tkachenko, Volodymyr
  • Abbate, Giancarlo
  • Marino, Antigone
  • Santamato, Enrico
  • Bennis, Noureddine
  • Quintana Arregui, Patxi Xabier
  • Otón Sánchez, José Manuel
Item Type: Presentation at Congress or Conference (Article)
Event Title: 4th International Conference Advanced Optoelectronics and Lasers (CAOL 2008)
Event Dates: 29/09/2008-04/10/2008
Title of Book: Proceedings of 4th International Conference Advanced Optoelectronics and Lasers (CAOL 2008)
Date: 2008
ISBN: 978-1-4244-1973-9
Subjects:
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Tecnología Fotónica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (188kB) | Preview

Abstract

Vertical aligned (VA) mode liquid crystal (LC) cells are very popular in transmissive directview and reflective projection displays because of high contrast ratio and wide viewing angle. A nonzero pretilt angle is generally used to avoid domain formation during molecular reorientation by electric field, as well as to reduce both driving voltage and response time. On the other hand, increasing the pretilt the quality of the dark state will be reduced, and thus an optimal value of pretilt has to be sought. To this aim, even different pretilt values on the two surfaces, yielding an asymmetric tilt distribution, could be considered. The pretilt effect on electro-optical properties of a VA LC cell has been investigated. Pretilt was controlled changing the angle of SiOx deposition on the substrate surfaces [1]. We employed Variable Angle Spectroscopic Ellipsometry [2] to obtain the tilt angle distribution versus the applied voltage. Finally, we compared experimental findings with simulated data at different anchoring energies. The results will be discussed.

More information

Item ID: 4226
DC Identifier: http://oa.upm.es/4226/
OAI Identifier: oai:oa.upm.es:4226
Deposited by: Memoria Investigacion
Deposited on: 23 Sep 2010 08:38
Last Modified: 20 Apr 2016 13:32
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM