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Proceedings Paper

Design of a cholesteric liquid crystal cell for a high-transmittance light shutter
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Paper Abstract

Recently, active studies on a transparent organic light-emitting diode (OLED) are in progress as a next generation display. However, since it is not possible to obtain a dark state using a transparent OLED, it exhibits poor visibility. This inevitable problem can be solved by placing a light shutter behind a transparent OLED display. In this paper, we propose a light shutter using dye-doped liquid crystals (LCs) whose Bragg reflection wavelength is chosen to be infrared by controlling the pitch of cholesteric liquid crystals (ChLCs). The proposed light shutter is switchable between the dark planar state and the transparent homeotropic state. The proposed light shutter has the advantages of the high transmittance, low operation voltage, and easy fabrication process compared with previous light shutter devices using liquid crystals. It is expected that the proposed light shutter can be applied to realize high visibility transparent OLEDs and emerging smart windows.

Paper Details

Date Published: 19 February 2014
PDF: 5 pages
Proc. SPIE 9004, Emerging Liquid Crystal Technologies IX, 90040L (19 February 2014); doi: 10.1117/12.2037547
Show Author Affiliations
Byeong-Hun Yu, Pusan National Univ. (Korea, Republic of)
Jae-Won Huh, Pusan National Univ. (Korea, Republic of)
Tae-Hoon Yoon, Pusan National Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 9004:
Emerging Liquid Crystal Technologies IX
Liang-Chy Chien; Antonio M. Figueiredo Neto; Kristiaan Neyts; Masanori Ozaki, Editor(s)

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