Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Evaluation technique of cell thickness, pretilt angle, and twist angle for guest–host liquid crystal displays

Not Accessible

Your library or personal account may give you access

Abstract

In this study, we demonstrated the evaluation of the device parameters, such as the cell thickness d, pretilt angles at the top and bottom substrates θ0 and θd, and twist angle ϕt for the guest–host (GH)-type electrically controlled birefringence (ECB) and twisted nematic (TN) modes, using the renormalized transmission ellipsometry (RTE). In the proposed technique, the extended Cauchy equation and the extinction coefficients for the ordinary and extraordinary rays based on the three Gaussian functions were employed as a description of the dielectric function. As a result, the numerically calculated phase difference Δ and angle of amplitude ratio Ψ determined using the proposed technique provided good agreement with the measured Δ and Ψ by introducing the extinction coefficient to the RTE. Furthermore, the device parameters for the GH-ECB and the GH-TN cells were obtained. It was confirmed that the extinction coefficient should be taken into consideration in an analysis of GH liquid crystal displays.

© 2013 Optical Society of America

Full Article  |  PDF Article
More Like This
Simple method to obtain accurate pretilt angles for thin twisted nematic liquid-crystal cells

Sheng-Ya Wang and Kei-Hsiung Yang
Appl. Opt. 52(2) 219-225 (2013)

Phase retardation vs. pretilt angle in liquid crystal cells with homogeneous and inhomogeneous LC director configuration

Victor Belyaev, Alexey Solomatin, and Denis Chausov
Opt. Express 21(4) 4244-4249 (2013)

Measurement of the liquid crystal pretilt angle in cells with homogeneous and inhomogeneous liquid crystal director configuration

Victor V. Belyaev, Alexey S. Solomatin, and Denis N. Chausov
Appl. Opt. 52(13) 3012-3019 (2013)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (12)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (4)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (16)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved