| Presentation | 2021-01-28 Effect of Absorption Anisotropy in the UV Region on the Shutter Properties of Twisted Nematic Liquid Crystal Devices Shota Harano, Rumiko Yamaguchi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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) |
| Keyword(in English) | Twisted Nematic Liquid Crystal / UV shutter effect / Absorption Anisotropy / Fluorescent Display / Anisotropy of refractive indices |
| Paper # | EID2020-15 |
| Date of Issue | 2021-01-21 (EID) |
| Conference Information | |
| Committee | EID / ITE-IDY / IEIJ-SSL / SID-JC / IEE-EDD |
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| Conference Date | 2021/1/28(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Rumiko Yamaguchi(Akita Univ.) |
| Vice Chair | Masahiro Yamaguchi(Tokyo Inst. of Tech.) / Tomoyuki Ishihara(Japan Display) |
| Secretary | Masahiro Yamaguchi(NTT) / Tomoyuki Ishihara(NHK) |
| Assistant | Mutsumi Kimura(Ryukoku Univ.) / Tomokazu Shiga(Univ. of Electro-Comm.) / Hiroko Kominami(Shizuoka Univ.) / Masanobu Mizusaki(SHARP) / Masayuki Kanbara(NAIST) |
| Paper Information | |
| Registration To | Technical Committee on Electronic Information Displays / Technical Group on Information Display / Division of Solid State Light Sources / Society for Information Display Japan Chapter / Technical Meeting on Electron Devices |
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| Language | JPN |
| 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 |
| 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.) |
| Date | 2021-01-28 |
| Paper # | EID2020-15 |
| Volume (vol) | vol.120 |
| Number (no) | EID-345 |
| Page | pp.pp.1-4(EID), |
| #Pages | 4 |
| Date of Issue | 2021-01-21 (EID) |