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Proceedings Paper

Color shift improvement in a broadband cholesteric liquid crystal polarizer through computational simulations
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Paper Abstract

Color shift on off-axis angles is key issue of the cholesteric liquid crystal (CLC) polarizer. In this paper, color shift issues on various azimuthal and viewing angles of back light unit assembled with CLC polarizers are analyzed by optical simulation. We found that smaller NZ value of quarter-wave plate (QWP) of our samples will compensate the color shift issue more efficiently. Although abnormal dispersion type QWP gives the best performance at the on-axis viewing angles, at large viewing angle its color shift is depending on azimuthal angle and bandwidth of CLC polarizers. Besides, a single layer type CLC polarizer of gradient pitch over a shorter bandwidth has better color coordinate property also be performed.

Paper Details

Date Published: 27 August 2008
PDF: 8 pages
Proc. SPIE 7050, Liquid Crystals XII, 705015 (27 August 2008); doi: 10.1117/12.794820
Show Author Affiliations
Ping-Chen Chen, Industrial Technology Research Institute (Taiwan)
Hui-Lung Kuo, Industrial Technology Research Institute (Taiwan)

Published in SPIE Proceedings Vol. 7050:
Liquid Crystals XII
Iam Choon Khoo, Editor(s)

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