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Proceedings Paper

A near-infrared Stokes parameter method for determining two-dimensional cell thickness and twist angle distributions of liquid crystal color displays
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Paper Abstract

We propose a two-dimensional (2D) and hyperfine measurement method for precisely determining cell parameter distributions such as a cell thickness and twist angle in color liquid crystal (LC) displays. The 2D cell thickness and twist angle distributions can easily be determined by measuring Stokes parameters of all pixels for red, green and blue in LCD panel at a wavelength of near-infrared region, because the transmission light at the wavelength is not absorbed by each color filter. In addition, the spatial resolution can be improved by increasing the magnification of the objective lens in front of a high resolution CCD camera. These cell parameters of each pixel in the practical LCD panel are compared and discussed.

Paper Details

Date Published: 12 December 2002
PDF: 8 pages
Proc. SPIE 4799, Liquid Crystals VI, (12 December 2002); doi: 10.1117/12.452482
Show Author Affiliations
Marenori Kawamura, Akita Univ. (Japan)
Susumu Sato, Akita Univ. (Japan)

Published in SPIE Proceedings Vol. 4799:
Liquid Crystals VI
Iam-Choon Khoo, Editor(s)

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