TITLE

Ellipsometric study of vertically aligned nematic liquid crystals

AUTHOR(S)
Marino, A.; Santamato, E.; Bennis, N.; Quintana, X.; Otón, J. M.; Tkachenko, V.; Abbate, G.
PUB. DATE
January 2009
SOURCE
Applied Physics Letters;1/5/2009, Vol. 94 Issue 1, p013508
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The director tilt angle distribution in vertically aligned nematic liquid crystal displays has been investigated by means of variable angle spectroscopic ellipsometry. Liquid crystal vertical alignment has been realized by thermal evaporation of SiOx. By changing the deposition angle, it is possible to control the pretilt angle. The director profile inside the sample was inferred by reflection and transmission ellipsometric measurements. The tilt angle distribution inside the cell versus the applied voltage is reported and eventually, comparing it with the simulations from the elastic theory, the anchoring energy has been obtained.
ACCESSION #
36178202

 

Related Articles

  • The Angle on LCD Monitors. Captain, Seán // PC World;Feb2003, Vol. 21 Issue 2, p113 

    Describes the angle of view of liquid crystal displays (LCD). Changes in LCD light and color from different positions; Measurement of angle of view.

  • Above threshold characteristics of amorphous silicon alloy thin-film transistors. Hyun, C.; Shur, M. S.; Hack, M.; Yaniv, Z.; Cannella, V. // Applied Physics Letters;1984, Vol. 45 Issue 11, p1202 

    We present experimental evidence to show that the field-effect mobility in amorphous silicon alloy thin-film transistors in the above threshold regime is dependent on the gate voltage. The current-voltage transistor characteristics exhibit a power law dependence on gate voltage with an exponent...

  • Molecular arrangement for twisted nematic liquid crystal displays having liquid crystalline materials with opposite chiral structures (reverse twisted nematic liquid crystal displays). Takatoh, Kohki; Akimoto, Mitsuhiro; Kaneko, Hiroomi; Kawashima, Koji; Kobayashi, Shunsuke // Journal of Applied Physics;Sep2009, Vol. 106 Issue 6, p064514-1 

    It was found that in twisted nematic liquid crystal displays (TN-LCDs) in which the chiral direction of the liquid crystalline (LC) material is opposite to the twist direction determined by the rubbing directions, which are referred to as a reverse twisted nematic LCDs, LC molecules tilt largely...

  • Electrofluidic displays using Young–Laplace transposition of brilliant pigment dispersions. Heikenfeld, J.; Zhou, K.; Kreit, E.; Raj, B.; Yang, S.; Sun, B.; Milarcik, A.; Clapp, L.; Schwartz, R. // Nature Photonics;May2009, Vol. 3 Issue 5, p292 

    Conventional electrowetting displays reconfigure the contact angle of a coloured oil film on a planar hydrophobic surface. We report on electrofluidic displays, in particular a three-dimensional microfluidic display device that provides a direct view of brilliantly coloured pigment dispersions....

  • Image sticking in liquid crystal displays with lateral electric fields. Daming Xu; Fenglin Peng; Haiwei Chen; Jiamin Yuan; Shin-Tson Wu; Ming-Chun Li; Seok-Lyul Lee; Weng-Ching Tsai // Journal of Applied Physics;2014, Vol. 116 Issue 19, p193102-1 

    We propose a kinetic model to account for the nonuniform adsorption and desorption processes in fringe field switching (FFS) and in-plane-switching liquid crystal displays. An equation is proposed to describe the generation mechanism of residual DC voltage and good agreements with experiment are...

  • Video Measuring System.  // Production Machining;Jan2006, Vol. 6 Issue 1, p56 

    The article presents information on the R-O Vision in-process video measuring system. The system is portable, compact and machine mountable and it can easily be moved from one piece of equipment to another. This system, which features simple menu-driven functions, is viewed on a large 15" LCD...

  • Three-color electrowetting display device for electronic paper. You, H.; Steckl, A. J. // Applied Physics Letters;7/12/2010, Vol. 97 Issue 2, p023514 

    Three-color electrowetting (EW) reflective display devices have been achieved using a vertical stack structure with colored oils. Fundamental properties (interface tension and geometry) of the EW process were investigated. Arrays of ∼1000–2000 pixels were constructed with pixel sizes...

  • Analytical current-voltage model for nanocrystalline silicon thin-film transistors. Hatzopoulos, A. T.; Pappas, I.; Tassis, D. H.; Arpatzanis, N.; Dimitriadis, C. A.; Templier, F.; Oudwan, M. // Applied Physics Letters;11/6/2006, Vol. 89 Issue 19, p193504 

    An analytical model for the drain current above threshold voltage, based on an exponential energy distribution of band tail states, has been applied to bottom-gated nanocrystalline silicon (nc-Si) thin-film transistors (TFTs). Analysis of the model shows that the slope of the exponential band...

  • Generation mechanism of residual direct current voltage in a liquid crystal display and its evaluation parameters related to liquid crystal and alignment layer materials. Mizusaki, Masanobu; Miyashita, Tetsuya; Uchida, Tatsuo; Yamada, Yuichiro; Ishii, Yutaka; Mizushima, Shigeaki // Journal of Applied Physics;7/1/2007, Vol. 102 Issue 1, p014904 

    The presence of ionic charges in a liquid crystal layer causes the generation of residual direct current (dc) voltage (Vrdc) in a liquid crystal cell. Vrdc is one of the most important factors governing the image quality of liquid crystal displays, because the existence of Vrdc causes the image...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics