YAMAGUCHI Rumiko

写真a

Affiliation

Graduate School of Engineering Science  Department of Mathematical Science and Electrical-Electronic-Computer Engineering  Electrical and Electronic Engineering Course 

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Research Interests 【 display / non-display 】

  • Optoelecrtronics

  • Liquid crystal devices

  • liquid crystal

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Graduating School 【 display / non-display 】

  • 1980.04
    -
    1984.03

    Akita University     Graduated

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Campus Career 【 display / non-display 】

  • 2022.04
    -
    Now

    Akita University   Graduate School of Engineering Science   Department of Mathematical Science and Electrical-Electronic-Computer Engineering   Electrical and Electronic Engineering Course   Professor  

  • 2019.04
    -
    2022.03

    Akita University   Graduate School of Engineering Science   Cooperative Major in Life Cycle Design Engineering   Professor  

  • 2005.12
    -
    2019.03

    Akita University   Graduate School of Engineering Science,   Associate Professor  

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Academic Society Affiliations 【 display / non-display 】

  • 2012.04
    -
    Now
     

    United States

     

    the Society for Information DIsplay

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Research Areas 【 display / non-display 】

  • Nanotechnology/Materials / Optical engineering and photon science

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electric and electronic materials

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electron device and electronic equipment

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Research Achievements 【 display / non-display 】

    ◆Original paper【 display / non-display 】

  • Anisotropic Light Diffusion Patterns in 180° Twisted Nematic Reverse-Mode PDLC

    Yoki Yamazaki and Rumiko Yamaguchi

    Proceedings of The International Display Workshops   32   529 - 532   2025.12

    Research paper (journal)   Domestic Co-author

  • Effect of host liquid crystal structure on nonlinear molecular reorientation of oligothiophene-doped liquid crystals

    Junki Yokota, Miho Aizawa, Kyohei Hisano, Shoichi Kubo, Rumiko Yamaguchi, Atsushi Shishido

    Society of Photo-Optical Instrumentation Engineers   12658   1265805   2023.08  [Refereed]

    Research paper (journal)   Domestic Co-author

    DOI

  • Physical properties of hydrogen bonded nematic liquid crystals and electro-optical properties in terahertz waves

    Rumiko Yamaguchi

    Optical Materials Express   13 ( 8 ) 2147   2023.07  [Refereed]  [Invited]

    Research paper (journal)   Single author

    DOI

  • Electro-Optical Characteristics of Quasi-Homogeneous Cell in Twisted Nematic Mode

    Yamaguchi Rumiko, Sakamoto Yoshiki

    Symmetry ( Multidisciplinary Digital Publishing Institute )  15 ( 3 ) 597   2023.02  [Refereed]

    Research paper (journal)   Domestic Co-author

    DOI

  • Special Section on Electronic Displays

    Kanbara Masayuki, Mizusaki, Masanobu, Yamaguchi Rumiko 他

    IEICE Transactions on Electronics   E106C ( 2 ) 20   2023.02

    Research paper (journal)   Domestic Co-author

    DOI

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    ◆Introduction and explanation【 display / non-display 】

  • Liquid crystal devices application utilizing alignment phenomena on polymer interfaces

    Rumiko Yamaguchi

      30 ( 1 ) 1 - 12   2026.01

    Introduction and explanation (scientific journal)   Single author

    Due to their fluidity, liquid crystals need to be confined within a certain space when applied to devices. The orientation state of liquid crystals, which determines their crystalline optical properties, is strongly influenced by the interface. In this report, various orientation phenomena at the interface between liquid crystals and polymers which serve as confining materials are described. Two-dimensional interfacial structures are defined as alignment films, whereas three-dimensional structures are characterized as polymer-dispersed liquid crystals. Devices that utilize various types of liquid crystal orientation at these interfaces are presented.

  • Special Section on Electronic Displays

    Yamaguchi, Rumiko

    IEICE Transactions on Electron . ( 電子情報通信学会 )  E105.C ( 2 ) 51 - 51   2022.02

    Introduction and explanation (scientific journal)   Single author

  • Foreword: Special section on electronic displays

    Yamaguchi, Rumiko

    IEICE Transactions on Electron . ( 電子情報通信学会 )  104 ( 2 ) ４４ - ４４   2021.02

    Introduction and explanation (scientific journal)   Single author

  • Thresholdless Electro-Optical Property in Homogeneously and Homeotropically Alignment Liquid Crystal Cells -Potential for Ultra Low Driving Voltage-

      23 ( 234 ) 182 - 187   2019.09

    Introduction and explanation (scientific journal)   Domestic Co-author

    CiNii Research

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    ◆International conference proceedings【 display / non-display 】

  • Electro-Optical Properties of Quasi-Twisted Nematic Cell with Spontaneous 90° Twist Liquid Crystal

    Rumiko Yamaguchi1

    Proceedings of The International Display Workshops   32   107 - 109   2025.12  [Refereed]

    Research paper (international conference proceedings)   Single author

  • Order Parameter of Hydrogen-Bonded Liquid Crystal Mixtures with Fluorinated Benzoic Acids

    Koki Sawataishi, Dan Jian, Rumiko Yamaguchi

    Proceedings of The International Display Workshops   31   2024.12  [Refereed]

    Research paper (international conference proceedings)   Domestic Co-author

  • Physical Properties of Hydrogen-Bonded Liquid Crystal with Fluorinated Benzoic Acids

    Rumiko Yamaguchi, Koki Sawataishi, Dan Jian

    Proceedings of The International Display Workshops   30   458 - 459   2023.12  [Refereed]

    Research paper (international conference proceedings)   Domestic Co-author

  • Proposal of Ultra-thin AR Wearable Display Film Using Liquid Crystal Waveguide

    Takao Tomono, Rumiko Yamaguchi

    Proceedings of The International Display Workshops   29   297 - 300   2022.12  [Refereed]

    Research paper (international conference proceedings)   Domestic Co-author

  • Ultra-low driving voltage in quasi-twisted nematic mode using weak / strong anchoring hybrid alignment surface

    Yamaguchi R.,Kawata, S.

    Proceedings of the International Display Workshops ( Proceedings of the International Display Workshops )  27   131 - 132   2021.12  [Refereed]  [Invited]

    Research paper (international conference proceedings)   Domestic Co-author

    DOI

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    ◆Other【 display / non-display 】

  • Ultra-low Driving Display mode in Hybrid Aligned Twisted Nematic Liquid Crystal Cell Using Weak Anchoring Surface

      ( DEI-22-068-083.085 ) 81 - 84   2022.07

    Summary of the papers read (national conference and other science council)   Domestic Co-author

    J-GLOBAL

  • Special Section on Electronic Displays

    Rumiko Yamaguchi

    IEICE TRANSACTIONS ON ELECTRONICS ( IEICE-INST ELECTRONICS INFORMATION COMMUNICATION ENGINEERS )  E105C ( 2 ) 51 - 51   2022.02

  • Electro-Optical Property in Twisted Nematic Liquid Crystal without Threshold Voltage

      ( EID2021-4 ) 1 - 4   2022.01

    Summary of the papers read (national conference and other science council)   Domestic Co-author

  • Special Section on Electronic Displays FOREWORD

    Rumiko Yamaguchi

    IEICE TRANSACTIONS ON ELECTRONICS ( IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG )  E104C ( 2 ) 44 - 44   2021.02

    Single author

  • Effect of Absorption Anisotropy in the UV Region on the Shutter Properties of Twisted Nematic Liquid Crystal Devices

      120 ( 345 ) 1 - 4   2021.01

    Summary of the papers read (national conference and other science council)   Domestic Co-author

    A reverse mode LC cell which is clear in a voltage-off state and a light scattering state under the voltage application has been proposed. Some mechanisms of the light scattering have been reported, one is by a microlens array system and another is a refractive index mismatching between a polymer matrix and liquid crystal domains. In this study, we have investigated the reverse mode LC cell by using both of the microlens array and the polymer dispersion light scattering mechanisms. An n-type LC was used and a hole patterned electrode was prepared to make a concave microlens array. Electro-optical properties have been measured in LC cells using the lens effect, a polymer matrix type and the combination of two light scattering mechanism. A contribution of each light scattering mechanism has been discussed and light scattering properties was improved when the cell thickness is optimized in the combination cell.

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Grant-in-Aid for Scientific Research 【 display / non-display 】

  • Grant-in-Aid for Scientific Research(C)

    Project Year： 2023.04  -  2026.03 

  • Grant-in-Aid for Scientific Research(C)

    Project Year： 2018.04  -  2022.03 

  • Grant-in-Aid for Scientific Research(C)

    Project Year： 2015.04  -  2018.03 

  • Grant-in-Aid for Scientific Research(C)

    Project Year： 2012.04  -  2015.03 

  • Grant-in-Aid for Scientific Research(C)

    Project Year： 2009.04  -  2012.03 

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Presentations 【 display / non-display 】

  • Anisotropic Light Diffusion Patterns in 180° Twisted Nematic Reverse-Mode PDLC

    Yoki Yamazaki and Rumiko Yamaguchi

    THE 31TH INTERNATIONAL DISPLAY WORKSHOPS  (International conference center Hiroshima)  2025.12  -  2025.12 

  • Electro-Optical Properties of Quasi-Twisted Nematic Cell with Spontaneous 90° Twist Liquid Crystal

    Rumiko Yamaguchi

    THE 31TH INTERNATIONAL DISPLAY WORKSHOPS  (Hiroshima International conference center Hiroshima)  2025.12  -  2025.12 

  • 3D optical switch for quantum communication

    Takao Tomono and Rumiko Yamaguchi

    IEEE Photonics Conference (IPC)  (Resorts World Convention Centre,SingaporeSingapore, Singapore)  2025.11  -  2025.11  IEEE

    DOI

  • 色素添加型PDLCの電気光学特性におけるドメイン径とカイラルピッチ依存性

    陳子杭，山口留美子

    日本液晶学会討論会  (京都市国際交流会館)  2025.09  -  2025.09  日本液晶学会

  • 水素結合性液晶における骨格基が物性値に及ぼす影響

    小林 昇太郎，山口 留美子

    日本液晶学会討論会  (京都市国際交流会館)  2025.09  -  2025.09  日本液晶学会

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Academic Activity 【 display / non-display 】

  • 2025.10
    -
    2027.09

  • 2025.04
    -
    2027.03

  • 2025.04
    -
    2026.03

  • 2024.05
    -
    2025.03

  • 2023.07
    -
    Now

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