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

Ping-Chen Chen; Hui-Lung Kuo

doi:10.1117/12.794820

27 August 2008 Color shift improvement in a broadband cholesteric liquid crystal polarizer through computational simulations

Ping-Chen Chen, Hui-Lung Kuo

Author Affiliations +

Proceedings Volume 7050, Liquid Crystals XII; 705015 (2008) https://doi.org/10.1117/12.794820
Event: Photonic Devices + Applications, 2008, San Diego, California, United States

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.

Citation Download Citation

Ping-Chen Chen and Hui-Lung Kuo "Color shift improvement in a broadband cholesteric liquid crystal polarizer through computational simulations", Proc. SPIE 7050, Liquid Crystals XII, 705015 (27 August 2008); https://doi.org/10.1117/12.794820

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