研究等業績 - 国際会議プロシーディングス - 山口　留美子

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年12月  [査読有り]

研究論文（国際会議プロシーディングス）   国内共著

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年12月  [査読有り]

研究論文（国際会議プロシーディングス）   国内共著

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年12月  [査読有り]  [招待有り]

研究論文（国際会議プロシーディングス）   国内共著

DOI

Thresholdless and Ultra-Low Drive Voltage in Liquid Crystals with Weak Anchoring Boundaries

Rumiko Yamaguchi

Optics & Photonics Taiwan International Conference     2019年12月  [招待有り]

研究論文（国際会議プロシーディングス）   単著

Light scattering of ordinary ray in reverse mode LC cell assisted by micro lens effect

Sagawa K.,Yamaguchi R.,Yanase S.

Proceedings of the International Display Workshops ( Proceedings of the International Display Workshops )  1   368 - 369   2019年11月  [査読有り]

研究論文（国際会議プロシーディングス）   国内共著

IMPROVEMENT OF REVERSE MODE LIQUID CRYSTALS USING LENS EFFECTS

R. Yamaguchi , K. Sagawa , T. Uchibori1 , R. Sasaki　, S. Yanase

The 18th Topical Meeting on the Optics of Liquid Crystals     2019年09月  [招待有り]

研究論文（国際会議プロシーディングス）   国内共著

Thresholdless electro-optical properties in homogeneous and homeotropic liquid crystal cells

Yamaguchi R.

Proceedings of the International Display Workshops ( Proceedings of the International Display Workshops )  25   154 - 155   2018年12月  [査読有り]

研究論文（国際会議プロシーディングス）   国内共著

（原文）：Hybrid aligned ceils were designed using strong and weak polar anchoring surfaces and the LC director distribution was numerically analyzed. When the anchoring is a critical one, LCs align homogeneously or homeotropicly. Such cells have no threshold voltage LCs reorient homeotropicly or homogeneously with very low driving voltage, respectively. © 2018 International Display Workshops. All rights reserved.

Effect of Critical Anchoring in Undistorted Twisted and Hybrid Aligned Liquid Crystal Cells

R. Yamaguchi

9th Italian- Japanese Workshops on Liquid Crystals     2018年09月  [招待有り]

研究論文（国際会議プロシーディングス）   単著

Anchoring control by nematic liquid crystal mixture on rubbed Poly (4-vinylpyridine) surface

R. Yamaguchi and K. Kudo

 27th International Liquid Crystal Conference (ILCC2018)     P4-C0-19   2018年07月  [査読有り]

研究論文（国際会議プロシーディングス）   国内共著

Nonlinear Optical Property of Negative Type Nematic Liquid Crystal Assisted by Voltage Application : Numerical Analysis

R. Yamaguchi, Koji Usui, Norihisa Akamatsu, Atsushi Shishido and Motoi Kinoshita

27th International Liquid Crystal Conference (ILCC2018)     P4-C1-8   2018年07月  [査読有り]

研究論文（国際会議プロシーディングス）   国内共著

Twist Angle Controllable Liquid Crystal Cell by Out-of-Plane Filed Using Strong/Weak Anchoring surfaces

R. Yamaguchi and Y. Sakamoto

 27th International Liquid Crystal Conference (ILCC2018)     5-AH-2   2018年07月  [査読有り]  [招待有り]

研究論文（国際会議プロシーディングス）   国内共著

Numerical Analysis of Electro-Optical Property in Twisted Nematic Cell Using Strong/Weak Anchoring

Y. Sakamotoi and R. Yamaguchi

27th International Liquid Crystal Conference (ILCC2018)     P2-C1-31   2018年07月  [査読有り]

研究論文（国際会議プロシーディングス）   国内共著

Improvement of Light Scattering in Reverse mode Liquid Crystal Cell with Microlens Structure

 K. Sagawa and R. Yamaguchi

27th International Liquid Crystal Conference (ILCC2018)     P2-C1-28    2018年07月  [査読有り]

研究論文（国際会議プロシーディングス）   国内共著

Hybrid Aligned Reverse Mode Cell Using Dual Frequency Liquid Crystal

R. Ushizaki and R. Yamaguchi

27th International Liquid Crystal Conference (ILCC2018)     P2-C1-27   2018年07月  [査読有り]

研究論文（国際会議プロシーディングス）   国内共著

Incident Angle Property in Hybrid Aligned Reverse Mode Liquid Crystal for Smart Glass Application

Rumiko Yamaguchi, Yuki Oikawa, Ryo Ushizaki, Tomoya Takasu

The papers of Joint Thechnical Meeting on "Dielectrics and Electrical Institution" and "Electronic Materials", IEE Japan   DEI-18   69 - 72   2018年01月  [招待有り]

研究論文（国際会議プロシーディングス）   国内共著

We have proposed a hybrid aligned nematic liquid crystal cell using a polymer stabilized technology for Smart glass application. The cell shows a reverse mode scattering property, which is transparent at any viewing angle in a voltage off-state. The cell turns to opaque by applying the voltage and has an asymmetrical scattering property at oblique incident angles. When using the liquid crystal with positive dielectric anisotropy, the oblique incident angle presenting the strong light scattered state is in the opposite direction when using negative dielectric anisotropy. In addition, we apply a dual-frequency liquid crystal to the cell and successfully switch the incident angle which gives the strong light scattering state by the frequency of the applied AC voltage. We expect the proposed devices can be a candidate for smart glass technology which works as a window blind selectively obstructing a midday sunlight.

Homogeneous-Twisted Nematic Transition Mode Liquid Crystal Display by Out-of-plane Field

Rumiko Yamaguchi and Yoshiki Sakamoto

Proceedings of The International Display Workshops   24   192 - 195   2017年12月  [査読有り]

研究論文（国際会議プロシーディングス）   国内共著

We have proposed a low driving LCD mode which changes from a homogeneous orientation to a TN orientation by applying out-of-plane field. The LC is sandwiched between weak and strong anchoring surfaces and easy axes of two surfaces are at right angles. LC director distributions and electro optical properties are numerically analyzed. A transmittance of the cell between crossed polarizers is 0% because of the homogeneous orientation in the voltage off state. Tilt and twist angles of LCs simultaneously increase and the transmittance also increases almost to 100% by the applied voltage of 1.5V, subsequently decreases to 0% by the voltage of 2.5 V. © 2017 Proceedings of the International Display Workshops. All rights reserved.

Nematic liquid crystal alignment and anchoring properties on rubbed Poly (4-vinylpyridine) surface

Kyosuke Kudo and Rumiko Yamaguchi

Proceedings of The International Display Workshops   24   268 - 269   2017年12月  [査読有り]

研究論文（国際会議プロシーディングス）   国内共著

Electrooptical Property of Polymer Stabilized Reverse Mode Cell by Nonuniform UV Irradiation

Ryousuke Sasaki, Rumiko Yamaguchi

Proceedings of The International Display Workshops   24   603 - 604   2017年12月  [査読有り]

研究論文（国際会議プロシーディングス）   国内共著

Numerical Analysis in Homogeneous-Twisted Nematic Transition Mode of Liquid Crystal Cell Using Weak and Strong Anchoring Surfaces

Yoshiki Sakamoto and Rumiko Yamaguchi

Proceedings of The International Display Workshops   24   294 - 295   2017年12月  [査読有り]

研究論文（国際会議プロシーディングス）   国内共著

Electrooptical property of polymer stabilized reverse mode cell by non uniform UV irradiation

Ryousuke Sasaki, Rumiko Yamaguchi

Proceedings of the International Display Workshops   1   603 - 604   2017年  [査読有り]

研究論文（国際会議プロシーディングス）  

Polymer stabilized reverse mode cells are prepared by irradiating with UV light through a line-and-space photomask. The polymer density is unevenly distributed in the cell and lower polymer density results in a lower threshold voltage than that prepared using uniform UV irradiation. High polymer density parts contribute to increasing mechanical resistance.

Homogeneous-twisted nematic transition mode liquid crystal display by out-of-plane field

Yamaguchi R, Sakamoto Y

Proceedings of the International Display Workshops   1   192 - 195   2017年  [査読有り]

研究論文（国際会議プロシーディングス）  

: We have proposed a low driving LCD mode which changes from a homogeneous orientation to a TN orientation by applying out-of-plane field. The LC is sandwiched between weak and strong anchoring surfaces and easy axes of two surfaces are at right angles. LC director distributions and electro optical properties are numerically analyzed. A transmittance of the cell between crossed polarizers is 0% because of the homogeneous orientation in the voltage off state. Tilt and twist angles of LCs simultaneously increase and the transmittance also increases almost to 100% by the applied voltage of 1.5V, subsequently decreases to 0% by the voltage of 2.5 V.

Reduction of driving voltage in polymer stabilized reverse mode cell: UV absorption of LC and UV light source

Inoue K.

23rd International Display Workshops in conjunction with Asia Display, IDW/AD 2016 ( 23rd International Display Workshops in conjunction with Asia Display, IDW/AD 2016 )  2   706 - 707   2016年12月  [査読有り]

研究論文（国際会議プロシーディングス）  

Effect of UV absorption anisotropy on hybrid aligned polymer stabilized liquid crystal cell

Rumiko Yamaguchi, Koichi Inoue, Tomoya Takasu

Proc. of SPIE   ( 9940 ) 994004-1 - 994004-7   2016年08月  [査読有り]  [招待有り]

研究論文（国際会議プロシーディングス）   国内共著

We have proposed a hybrid alignment nematic (HAN) liquid crystal cell using a polymer stabilized (PS) technology. The
cell shows a reverse mode scattering property. The PS-HAN cell is transparent at any viewing angle in the off-state and
has an asymmetrical scattering property at incident angles in the on-state. Applying the cell to a smart glass, it cell can
selectively scatter a midday sunlight with a function of window blinds. In this study, two polymerization processes, an
irradiation with UV light from planar and vertical aligned sides of the cell have been investigated. UV penetration depth
has also been estimated from planar and vertical aligned sides of the cell. LC materials with different UV absorption spectra
were prepared. A driving voltage, an optical property and a polymer morphology were measured in PS-HAN cells. The
UV intensity profile have an effect on polymer density and particle size, which changed the driving voltage and the light
scattering property in the PS-HAN cell. The study on the UV penetration in the polymer stabilized technology can improve
their performance.

DOI

UV absorption anisotropy in hybrid aligned polymer stabilized liquid crystal cell

Rumiko Yamaguchi, Koichi Inoue, Tomoya Takasu, Shota Mitsuhashi

The paper of joint thechnical meeting on "dielectrics and "electrical insulation" and "electronic materials", IEE Japan   16 ( 014 ) 29 - 32   2016年01月  [招待有り]

研究論文（国際会議プロシーディングス）   国内共著

We have proposed a hybrid alignment nematic liquid crystal cell using a polymer stabilized technology. The cell shows a reverse mode scattering property and is transparent at any viewing angle in the off-state. The cell turns to opaque in the on-state and has an asymmetrical scattering property at incident angles. The cell has been prepared by polymerizing a reactive mesogen with UV irradiation in the liquid crustal solution. When liquid crystal materials have UV absorption anisotropy, a UV penetration depth from a planar alignment side depth should be shorter than that from a vertical alignment side in a polymerization process. In this report, a UV penetration depth is carefully considered in a polymerization process using liquid crystal materials with large and small UV absorption anisotropy. Next, electro-optical properties are measured and polymer morphologies are observed by using SEM. The UV irradiation from a planar alignment substrate side causes a polymer rich layer near the UV irradiated substrate and the stronger scattering in the on-state when the liquid crystal has large UV absorption anisotropy. Applying the cell to a smart glass, the cell can selectively scatter a midday sunlight with a function of window blinds.

Response properties of twisted nematic liquid crystal gratings

Michinori H.

Proceedings of the International Display Workshops ( Proceedings of the International Display Workshops )  1   494 - 495   2015年12月  [査読有り]

研究論文（国際会議プロシーディングス）  

Mechanism of low driving voltage in polymer stabilized reverse mode cell

Koichi I., Rumiko Y.

Proceedings of the International Display Workshops   1   454 - 455   2015年12月  [査読有り]

研究論文（国際会議プロシーディングス）   国内共著

Mechanism of low driving voltage in polymer stabilized reverse mode cell

Koichi I.

Proceedings of the International Display Workshops ( Proceedings of the International Display Workshops )  1   454 - 455   2015年12月  [査読有り]

研究論文（国際会議プロシーディングス）  

Liquid crystal molecular orientation state of micropatterned twisted nematic liquid crystal cells: A computer simulation investigation

Honma M.

21st International Display Workshops 2014, IDW 2014 ( Proceedings of the International Display Workshops )  1   117 - 118   2014年12月  [査読有り]

研究論文（国際会議プロシーディングス）  

Switchable liquid crystal window for daylight control with asymmetrical incident angle

Takasu T.

Proceedings of the International Display Workshops ( Proceedings of the International Display Workshops )  1   229 - 230   2013年12月  [査読有り]

研究論文（国際会議プロシーディングス）  

Dependence of cell thickness on scattering property in reverse mode liquid crystal cells with different morphologies

Sakurai S.

Proceedings of the International Display Workshops ( Proceedings of the International Display Workshops )  1   227 - 228   2013年12月  [査読有り]

研究論文（国際会議プロシーディングス）  

Electro-optical properties in polymer stabilized reverse mode liquid crystal display

Yamaguchi R.

Proceedings of the International Display Workshops ( Proceedings of the International Display Workshops )  1   99 - 100   2012年12月  [査読有り]

研究論文（国際会議プロシーディングス）  

Selection of easy axis by liquid crystal on rubbed PVCi surface

Yamaguchi R.

Proceedings of the International Display Workshops ( Proceedings of the International Display Workshops )  1   107 - 108   2010年12月  [査読有り]

研究論文（国際会議プロシーディングス）  

Security applications of liquid crystal film with plural latent images

Yamaguchi R.

Proceedings of SPIE - The International Society for Optical Engineering ( Proceedings of SPIE - The International Society for Optical Engineering )  7232   2009年04月  [査読有り]  [招待有り]

研究論文（国際会議プロシーディングス）  

DOI

Photo degradation properties in oriented liquid crystal modes

Yamaguchi R.

IDW '08 - Proceedings of the 15th International Display Workshops ( Proceedings of the International Display Workshops )  3   1661 - 1664   2008年12月  [査読有り]

研究論文（国際会議プロシーディングス）  

Photostability evaluation of liquid crystal cell by far field pattern observation

Yamaguchi R.

IDW '07 - Proceedings of the 14th International Display Workshops ( Proceedings of the International Display Workshops )  3   1677 - 1680   2007年12月  [査読有り]

研究論文（国際会議プロシーディングス）  

Multidomain liquid crystal alignment properties on anchoring controllable polymer surface

Yamaguchi R.　Sato S.

Proceedings of SPIE - The International Society for Optical Engineering ( Proceedings of SPIE - The International Society for Optical Engineering )  6654   2007年12月  [査読有り]  [招待有り]

研究論文（国際会議プロシーディングス）   国内共著

DOI

White fluorescent liquid crystal display using guest-host and scattering modes

Yamaguchi R.

IDW '06 - Proceedings of the 13th International Display Workshops ( Proceedings of the International Display Workshops )  1   193 - 196   2006年12月  [査読有り]

研究論文（国際会議プロシーディングス）  

Color switching in liquid crystal display using high dichroic fluorescent dyes

Yamaguchi R.

IDW/AD'05 - Proceedings of the 12th International Display Workshops in Conjunction with Asia Display 2005 ( Proceedings of the International Display Workshops )  ( 1 ) 127 - 130   2005年12月  [査読有り]

研究論文（国際会議プロシーディングス）  

Optical phase-control devices using liquid crystal molecular orientation density

Yanase S.

Proceedings of SPIE - The International Society for Optical Engineering ( Proceedings of SPIE - The International Society for Optical Engineering )  5936   1 - 8   2005年12月  [査読有り]

研究論文（国際会議プロシーディングス）  

DOI

Polarized latent image forming in liquid crystal devices using polymer surface photo-modification technique

Yamaguchi R.

Proceedings of SPIE - The International Society for Optical Engineering ( Proceedings of SPIE - The International Society for Optical Engineering )  5618   166 - 173   2004年12月  [査読有り]

研究論文（国際会議プロシーディングス）  

DOI

Fluorescent liquid crystal displays with emission and reflection modes

Yamaguchi R.

SID Conference Record of the International Display Research Conference ( SID Conference Record of the International Display Research Conference )    253 - 256   2001年12月  [査読有り]

研究論文（国際会議プロシーディングス）  

Measurement of twist angle distribution and an azimuthal anchoring energy by Stokes parameter method (SPM)

Yamaguchi R.

Proceedings of the 5th Asian Symposium on Information Display, ASID 1999 ( Proceedings of the 5th Asian Symposium on Information Display, ASID 1999 )    181 - 184   1999年12月  [査読有り]

研究論文（国際会議プロシーディングス）  

DOI

Polarization converting devices using a UV curable liquid crystal

Masuda S.

Proceedings of SPIE - The International Society for Optical Engineering ( Proceedings of SPIE - The International Society for Optical Engineering )  2873   301 - 304   1996年08月  [査読有り]

研究論文（国際会議プロシーディングス）  

DOI