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Paper Abstract and Keywords
Presentation 2021-01-28 13:00
Effect of Absorption Anisotropy in the UV Region on the Shutter Properties of Twisted Nematic Liquid Crystal Devices
Shota Harano, Rumiko Yamaguchi (Akita Univ.) EID2020-15
Abstract (in Japanese) (See Japanese page) 
(in English) A transparent liquid crystal display using a twisted nematic (TN) cell , a UV light polarizers which is transparent in a visible light and a polarized light-emitting films have been proposed. TN cell is applied to this display as a UV shutter. However, physical properties of the LC material for the UV light have not been reported and electro-optical properties in a UV light region has not been clarified. In this study, TN cells using LCs with and without UV absorption were prepared and electro-optical properties were measured with a UV-LED (max: 365 nm). Two alignment geometries of the polarizer and LC orientation were adopted with a consideration of the UV absorbance of LC materials. Moreover, the electro-optical curve was calculated by theoretically including an absorption anisotropy of the LC material and calculated results were compared with the measured one. Finally, absorption coefficiencies of short and long LC axis and refractive index anisotropy were successfully clarified at 365 nm.
Keyword (in Japanese) (See Japanese page) 
(in English) Twisted Nematic Liquid Crystal / UV shutter effect / Absorption Anisotropy / Fluorescent Display / Anisotropy of refractive indices / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 345, EID2020-15, pp. 1-4, Jan. 2021.
Paper # EID2020-15 
Date of Issue 2021-01-21 (EID) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee EID ITE-IDY IEIJ-SSL SID-JC IEE-EDD  
Conference Date 2021-01-28 - 2021-01-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EID 
Conference Code 2021-01-EID-IDY-SSL-JC-EDD 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Effect of Absorption Anisotropy in the UV Region on the Shutter Properties of Twisted Nematic Liquid Crystal Devices 
Sub Title (in English)  
Keyword(1) Twisted Nematic Liquid Crystal  
Keyword(2) UV shutter effect  
Keyword(3) Absorption Anisotropy  
Keyword(4) Fluorescent Display  
Keyword(5) Anisotropy of refractive indices  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Shota Harano  
1st Author's Affiliation Akita University (Akita Univ.)
2nd Author's Name Rumiko Yamaguchi  
2nd Author's Affiliation Akita University (Akita Univ.)
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Speaker Author-1 
Date Time 2021-01-28 13:00:00 
Presentation Time 5 minutes 
Registration for EID 
Paper # EID2020-15 
Volume (vol) vol.120 
Number (no) no.345 
Page pp.1-4 
#Pages 4 
Date of Issue 2021-01-21 (EID) 

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