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Transmittance control of a liquid crystal device using a dye mixture
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Paper Abstract

Transmittance-control devices, such as a suspended particle device, electrochromic device, and dye-doped liquid crystal (LC) device, have been studied for a smart window, eyewear, and automotive applications. These devices require a high transmittance difference between the transparent and opaque states. Among the dye-doped LC devices, a dye-doped chiral-nematic LC (CNLC) cell has been widely used for transmittance-control devices. However, the colors of cells are different between the homogeneously aligned and CNLC cell. In this study, we demonstrated a systematic approach to find optimum dye concentrations for black color in a dye-doped CNLC cell. We took its transmission spectrum into account in the numerical calculation to realize the black color in a dye-doped CNLC cell. Through the iterative method, we could optimize the concentration of each single dye for realizing the black color. We confirmed that a dye-doped CNLC cell designed by considering transmission spectrum of it could provide the black color in the CIE 1931 color space.

Paper Details

Date Published: 14 September 2018
PDF: 6 pages
Proc. SPIE 10735, Liquid Crystals XXII, 107351A (14 September 2018); doi: 10.1117/12.2322716
Show Author Affiliations
Seong-Min Ji, Pusan National Univ. (Korea, Republic of)
Seung-Won Oh, Pusan National Univ. (Korea, Republic of)
Young-Seo Jo, Pusan National Univ. (Korea, Republic of)
Seung-Min Nam, Pusan National Univ. (Korea, Republic of)
Sang-Hyeok Kim, Pusan National Univ. (Korea, Republic of)
Jae-Won Huh, Pusan National Univ. (Korea, Republic of)
Eunjung Lim, LG Chemical (Korea, Republic of)
JinHong Kim, LG Chemical (Korea, Republic of)
Tae-Hoon Yoon, Pusan National Univ. (Korea, Republic of)


Published in SPIE Proceedings Vol. 10735:
Liquid Crystals XXII
Iam Choon Khoo, Editor(s)

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