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On the optical thickness dependence of the electro-optical properties of an in-plane switching LC cell

T. BEICA1, S. FRUNZA1,* , I. ZGURA1, R. MOLDOVAN2, A. DINESCU3

Affiliation

  1. National Institute of Materials Physics, R-077125 Magurele, Romania
  2. Romanian Academy Center for Advanced Studies in Physics, R-050711 Bucharest, Romania
  3. National Institute of Microtechnologies, R-077190 Bucharest, Romania

Abstract

The optical transmission of a liquid crystal cell with in-plane switching (IPS) mode is studied as function of the thickness for different rubbing angles and anchoring energy. It was found that the light transmission has a maximum at the value of ~0.66 for the ratio of the optical path difference (introduced by the undisturbed cell) to λ and that this value does not depend on λ, in the case of a very strong anchoring energy and of a rubbing angle of 13º. These experimental results agree very well with simulations using a simplified model. Moreover, the simulations have shown that the thickness corresponding to such a maximum optical path difference depends non-monotonously on the anchoring strength for five values of the rubbing angles (in the range 0 to 40º). For a given anchoring energy this thickness decreases with increasing rubbing angle..

Keywords

Electro-optical properties, IPS cell, Anchoring energy, Optical thickness, Simulation of transmission curves.

Submitted at: Feb. 18, 2008
Accepted at: March 17, 2008

Citation

T. BEICA, S. FRUNZA, I. ZGURA, R. MOLDOVAN, A. DINESCU, On the optical thickness dependence of the electro-optical properties of an in-plane switching LC cell, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 3, pp. 558-563 (2008)