Thorough elucidation and artificial control of the self-formation mechanism of the surface molecular alignment fabricated by means of slit-coater

• Project/Area Number: 25390053
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Applied materials
• Research Institution: Nagaoka University of Technology
• Principal Investigator: Kimura Munehiro 長岡技術科学大学, 工学(系)研究科(研究院), 准教授 (20242456)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2013: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
• Keywords: ネマティック液晶 / 液晶配向 / フレキシブルディスプレイ / 液中原子間力顕微鏡 / UV重合 / プレティルト角 / 配向印刷 / アンカリングエネルギー / プリンテッドエレクトロニクス

Outline of Final Research Achievements

A novel method that utilizes a slit coater as a liquid crystal (LC) molecular alignment technique was studied. It was confirmed that the alignment transition from a planar alignment to a vertical alignment was caused by UV irradiation after LC coating when a certain UV-curable mesogen was doped with the nematic LC. From experimental results by means of atomic force microscope and surface energy measurement under the several conditions, it seems that the pretilt angle depends on the UV irradiation condition. UV-irradiation through a stripe-patterned photo-mask can make stripe-domain with vertical and planar alignment regions. It was also found that the azimuthal surface anchoring energy does not prevent degradation and is of the order of 10^-6～10^-5 J/m^2. We applied this method to fabricate liquid crystal display devices. Cholesteric liquid crystal with short helical pitch can be aligned uniformly and exhibits an electric field-induced tilt of optical axis with fast response speed.

Research Products

• [Journal Article] Study of polymer-stabilised blue phase liquid crystal on a single substrate (2016)
  • Author(s): 1)Naoto Endo, Takahiro Matsumoto, Hirotsugu Kikuchi and Munehiro Kimura
  • Journal Title: Liquid Crystals Volume: 43 Issue: 1 Pages: 66-76
  • DOI: 10.1080/02678292.2015.1055602
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Measurement Method for Flexoelectric Coefficients of Nematic Liquid Crystals by means of Symmetrically Oblique Incidence Transmission Ellipsometry (2015)
  • Author(s): Munehiro Kimura, Taiki Watanabe, Hiroki Matsumoto, Taiju Takahashi, and Tadashi Akahane
  • Journal Title: Molecular Crystals and Liquid Crystals Volume: 610 Issue: 1 Pages: 129-134
  • DOI: 10.1080/15421406.2015.1025612
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Effects of host liquid crystal composition on the stability of liquid crystalline blue phases (2015)
  • Author(s): Md. Asiqur Rahman, Suhana Mohd Said, Itaru Yamana, Thet Naing Oo, and Munehiro Kimura,
  • Journal Title: Molecular Crystals and Liquid Crystals Volume: 608 Issue: 1 Pages: 82-90
  • DOI: 10.1080/15421406.2014.949600
  • Peer Reviewed
• [Journal Article] Study on the Functions of UV Curable Reactive Mesogen in LCD Fabricated by Coating Method (2014)
  • Author(s): Munehiro Kimura, Yukihiro Nagataki, Keisuke Ueda, and Takuya Yamamoto
  • Journal Title: Journal of Photopolymer Science and Technology Volume: 27 Issue: 3 Pages: 291-296
  • DOI: 10.2494/photopolymer.27.291
  • NAID: 130004687579
  • ISSN: 0914-9244, 1349-6336
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] 界面配向がブルー相液晶の安定性および電気光学特性に与える影響 (2014)
  • Author(s): 山名達、テナインウー、菊地裕嗣、木村宗弘、赤羽正志
  • Journal Title: 映像情報メディア学会誌 Volume: 68
  • NAID: 130004691249
  • Peer Reviewed
• [Journal Article] Study of electro-optical properties of liquid crystal/ reactive mesogen-coated liquid crystal display fabricated by slit coater (2014)
  • Author(s): Yukihiro Nagataki, Thet Naing Oo, Takuya Yamamoto, Katsuyoshi Miyashita, Hajime Hirata, Munehiro Kimura, and Tadashi Akahane
  • Journal Title: Liquid Crystals Volume: 41 Issue: 5 Pages: 667-672
  • DOI: 10.1080/02678292.2013.873495
  • Peer Reviewed
• [Journal Article] Study of Liquid Crystal Display Fabricated by Slit Coater using Two UV Irradiation Conditions (2013)
  • Author(s): Keisuke Ohtsuka, Yukihiro Nagataki, Kazuya Goda, Thet Naing Oo, Katsuyoshi Miyashita, Hajime Hirata, Munehiro Kimura, and Tadashi Akahane
  • Journal Title: Japanese Journal of Applied Physics Volume: 52 Issue: 5S1 Pages: 05DB04-05DB04
  • DOI: 10.7567/jjap.52.05db04
  • Peer Reviewed
• [Journal Article] Single-substrate polymer-stabilized blue phase liquid crystal display (2013)
  • Author(s): Munehiro Kimura, Norihiro Nagumo, Thet Naing Oo, Naoto Endo, Hirotsugu Kikuchi, and Tadashi Akahane
  • Journal Title: Optical Materials Express Volume: 3 Issue: 12 Pages: 2086-2095
  • DOI: 10.1364/ome.3.002086
  • Peer Reviewed
• [Journal Article] Fabrication of Liquid Crystal Displays by Using Slit Coater (2013)
  • Author(s): 木村 宗弘, 大塚 啓佑, テ ナイン ウー, 赤羽 正志, 平田 肇, 宮下 勝好
  • Journal Title: The Journal of The Institute of Image Information and Television Engineers Volume: 67 Issue: 10 Pages: J359-J364
  • DOI: 10.3169/itej.67.J359
  • NAID: 130004747690
  • ISSN: 1342-6907, 1881-6908
  • Peer Reviewed
• [Journal Article] Electro-optic potential of room and high temperature polymer stabilized blue phase liquid crystal (2013)
  • Author(s): Md. Asiqur Rahman, Itaru Yamana, Yeap Guan Yeow, Suhana Mohd Said, and Munehiro Kimura
  • Journal Title: Advanced Materials Research Volume: 895 Pages: 186-189
  • DOI: 10.4028/www.scientific.net/amr.895.186
  • Peer Reviewed
• [Journal Article] Evaluation technique of cell thickness, pretilt angle, and twist angle for guest-host liquid crystal displays (2013)
  • Author(s): Kazuya Goda, Mami Nagasawa, Munehiro Kimura, and Tadashi Akahane
  • Journal Title: Journal of the Optical Society of America A Volume: 30 Issue: 4 Pages: 717-725
  • DOI: 10.1364/josaa.30.000717
  • Peer Reviewed
• [Journal Article] Relationship between rubbing-induced anisotropy and surface azimuthal anchoring energy of nematic liquid crystals (2013)
  • Author(s): Suguru Saito, Kazuya Goda, Munehiro Kimura, and Tadashi Akahane
  • Journal Title: Society for Information Display Volume: 21 Issue: 2 Pages: 83-88
  • DOI: 10.1002/jsid.149
  • Peer Reviewed
• [Journal Article] 液晶ディスプレイの基礎 (2013)
  • Author(s): 木村 宗弘
  • Journal Title: 映像情報メディア学会誌 Volume: 67 Pages: 43-48
  • NAID: 110009615998
• [Presentation] フレキシブル液晶ディスプレイの将来性 (2016)
  • Author(s): 木村宗弘
  • Organizer: 電子情報技術産業協会
  • Place of Presentation: 法政大学小金井キャンパス
  • Year and Date: 2016-03-04
• [Presentation] 原子間力顕微鏡を用いた 偏析界面の液晶中観察 (2016)
  • Author(s): 小林勇樹, 高橋成也, 木村宗弘
  • Organizer: 発光型非発光型ディスプレイ合同研究会 - 照明学会
  • Place of Presentation: 富山大学
  • Year and Date: 2016-01-28
• [Presentation] Uniform Lying Helix of Cholesteric Liquid Crystal Aligned by Means of Coating Method with Electric Treatment (2015)
  • Author(s): Naoto Endo, Munehiro Kimura
  • Organizer: The 22st International Display Workshops
  • Place of Presentation: Otsu Prince Hotel
  • Year and Date: 2015-12-09
  • Int'l Joint Research
• [Presentation] USHの電気光学応答測定 (2015)
  • Author(s): 河野孝明,木村宗弘
  • Organizer: 2015年日本液晶学会討論会
  • Place of Presentation: 東京工業大学
  • Year and Date: 2015-09-07
• [Presentation] 原子間力顕微鏡を用いた高分子界面のin-situ評価に関する研究 (2015)
  • Author(s): 高橋成也,木村宗弘,小林勇樹
  • Organizer: 2015年日本液晶学会討論会
  • Place of Presentation: 東京工業大学
  • Year and Date: 2015-09-07
• [Presentation] SOITE法によるナノ粒子添加液晶の物性定数の測定及び評価 (2015)
  • Author(s): 高木達哉,木村宗弘,小林駿介
  • Organizer: 2015年日本液晶学会討論会
  • Place of Presentation: 東京工業大学
  • Year and Date: 2015-09-07
• [Presentation] Measurement and LCD application of Flexoelectricity of Nematic Liquid Crystal: Symmetrically Oblique Incidence Transmission Ellipsometry (2015)
  • Author(s): Munehiro Kimura
  • Organizer: The 15th International Meeting on Information Display
  • Place of Presentation: Exhibition and Convention Center in Daegu, Korea
  • Year and Date: 2015-08-18
  • Int'l Joint Research
• [Presentation] Measurement of Flexoelectric Coefficients by Means of Transmission Ellipsometry with Twisted Nematic Liquid Crystal Cell (2015)
  • Author(s): Hiroki Matsumoto, Filzah Binti Zainal Arif, Munehiro Kimura
  • Organizer: The 4th International GIGAKU Conference in Nagaoka
  • Place of Presentation: 長岡技術科学大学
  • Year and Date: 2015-06-20
  • Int'l Joint Research
• [Presentation] Study of Polymer Stabilized Blue Phase LC on Flexible Substrate (2015)
  • Author(s): Naoto Endo, Takahiro Matsumoto, Munehiro Kimura
  • Organizer: The 4th International GIGAKU Conference in Nagaoka
  • Place of Presentation: 長岡技術科学大学
  • Year and Date: 2015-06-20
  • Int'l Joint Research
• [Presentation] Direct observation of liquid crystal interface imaged by atomic force microscope (2015)
  • Author(s): Yuki Kobayashi, Takuya Yamamoto, Keisuke Ueda, and Munehiro Kimura
  • Organizer: The 4th International GIGAKU Conference in Nagaoka
  • Place of Presentation: 長岡技術科学大学
  • Year and Date: 2015-06-20
  • Int'l Joint Research
• [Presentation] Measurement of flexoelectric coefficients by means of transmission ellipsometry with twisted nematic liquid crystal cell (2015)
  • Author(s): Hiroki Matsumoto, Filzah Binti Zainal Arif, Munehiro Kimura
  • Organizer: The 5th International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies
  • Place of Presentation: 朱鷺メッセ新潟
  • Year and Date: 2015-06-17
  • Int'l Joint Research
• [Presentation] Direct observation of liquid crystal interface imaged by atomic force microscope (2015)
  • Author(s): Yuki Kobayashi, Takuya Yamamoto, Keisuke Ueda, and Munehiro Kimura
  • Organizer: The 5th International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies
  • Place of Presentation: 朱鷺メッセ新潟
  • Year and Date: 2015-06-17
  • Int'l Joint Research
• [Presentation] 高分子安定化ブルー相液晶セルの電気光学応答に与える高分子の影響に関する研究 (2015)
  • Author(s): 松本 崇裕, 木村 宗弘
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 東海大学湘南キャンパス（神奈川県平塚市）
  • Year and Date: 2015-03-11 – 2015-03-14
• [Presentation] Uniform Standing Helixモード液晶素子の基礎研究 (2015)
  • Author(s): 小野寺郁也, 木村宗弘
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 東海大学湘南キャンパス（神奈川県平塚市）
  • Year and Date: 2015-03-11 – 2015-03-14
• [Presentation] 横電界駆動TNLC によるフレクソエレクトリック係数評価 (2015)
  • Author(s): Filzah Binti Zainal Arif、松本紘希、木村宗弘、赤羽正志
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 東海大学湘南キャンパス（神奈川県平塚市）
  • Year and Date: 2015-03-11 – 2015-03-14
• [Presentation] Study of Polymer Stabilized Blue Phase LC on Flexible Substrate (2014)
  • Author(s): Naoto Endo, Takahiro Matsumoto, Hirotsugu Kikuchi, Munehiro Kimura
  • Organizer: The 21st International Display Workshops
  • Place of Presentation: 朱鷺メッセ（新潟県新潟市）
  • Year and Date: 2014-12-03 – 2014-12-05
• [Presentation] Direct morphology observation of liquid crystal-polymer boundary imaged by atomic force microscope (2014)
  • Author(s): Keisuke Ueda, Takuya Yamamoto, Munehiro Kimura
  • Organizer: The 21st International Display Workshops
  • Place of Presentation: 朱鷺メッセ（新潟県新潟市）
  • Year and Date: 2014-12-03 – 2014-12-05
• [Presentation] Pretilt angle and surface anchoring energy of Liquid Crystal Display Fabricated by Slit Coater (2014)
  • Author(s): Takuya Ymamoto, Munehiro Kimura
  • Organizer: The 21st International Display Workshops
  • Place of Presentation: 朱鷺メッセ（新潟県新潟市）
  • Year and Date: 2014-12-03 – 2014-12-05
• [Presentation] Electro-Optic Response of a Chiral Nematic LC with Low Dielectric Anisotropy (2014)
  • Author(s): Ikuya Onodera, Munehiro Kimura
  • Organizer: The 21st International Display Workshops
  • Place of Presentation: 朱鷺メッセ（新潟県新潟市）
  • Year and Date: 2014-12-03 – 2014-12-05
• [Presentation] Proposal of Measuring the Difference in Flexoelectric Coefficient of a TN-LC Cell by Transmission Ellipsometry (2014)
  • Author(s): Filzah Binti Zainal Arif, Hiroki Matsumoto, Munehiro Kimura, Tadashi Akahane
  • Organizer: The 21st International Display Workshops
  • Place of Presentation: 朱鷺メッセ（新潟県新潟市）
  • Year and Date: 2014-12-03 – 2014-12-05
• [Presentation] Study on Flexoelectric Coefficients of Nematic Liquid Crystals by Means of Symmetrically Oblique Incidence Transmission Ellipsometry (2014)
  • Author(s): Hiroki Matsumoto, Filzah Binti Zainal Arif, Munehiro Kimura
  • Organizer: The 14th International Meeting on Information Display
  • Place of Presentation: EXCO, Daegu, Korea
  • Year and Date: 2014-08-26 – 2014-08-29
• [Presentation] Measurement Method for Flexoelectric Coefficients of Nematic Liquid Crystals by means of Symmetrically Oblique Incidence Transmission Ellipsometry (2014)
  • Author(s): M. Mimura, D. Watanabe, T. Takahashi, and T. Akahane
  • Organizer: 5th International Liquid Crystal Conference
  • Place of Presentation: Trinity College Dublin, Ireland
  • Year and Date: 2014-06-29 – 2014-07-04
• [Presentation] SOITE法を用いたフレクソエレクトリック係数の評価: (2014)
  • Author(s): 渡辺 大樹,高橋 泰樹,木村 宗弘,赤羽 正志
  • Organizer: 2014発光型／非発光型ディスプレイ合同研究会
  • Place of Presentation: 新潟大学、新潟
• [Presentation] Bendable Display Device using Polymer-stabilized Blue Phase Liquid Crystal (2013)
  • Author(s): Munehiro Kimura, Norihiro Nagumo, Thet Naing Oo, Hirotsugu Kikuchi, and Tadashi Akahane
  • Organizer: 20th International Workshop on Active-Matrix Flatpanel Displays -TFT Technologies and FPD Materials
  • Place of Presentation: 龍谷大学、京都
  • Invited
• [Presentation] Evaluation of device parameters of Liquid Crystal Display by means of renormalized spectroscopic ellipsometry (2013)
  • Author(s): Munehiro Kimura, Kazuya Goda, and Tadashi Akahane
  • Organizer: 6th International Conference on Spectroscopic Ellipsometry
  • Place of Presentation: 京都リサーチパーク
• [Presentation] 高分子安定化ブルー相の電気光学特性における基板界面配向が及ぼす影響 (2013)
  • Author(s): 山名 達, Thet Naing Oo, 菊池 裕嗣, 木村 宗弘, 赤羽 正志
  • Organizer: 2013年日本液晶学会討論会
  • Place of Presentation: 大阪大学、豊中
• [Presentation] 光配向セルの液晶界面配向に関する研究 (2013)
  • Author(s): 孫 賀, Thet Naing Oo, 木村 宗弘, 赤羽 正志
  • Organizer: 2013年日本液晶学会討論会
  • Place of Presentation: 大阪大学、豊中
• [Presentation] スリットコータで作製したＬＣＤの電気光学特性におけるＵＶ照射条件の影響 (2013)
  • Author(s): 長瀧 征弥, Thet Naing Oo, 宮下 勝好, 平田 肇, 木村 宗弘, 赤羽 正志
  • Organizer: 2013年日本液晶学会討論会
  • Place of Presentation: 大阪大学、豊中
• [Presentation] 異なる配向膜上における方位角アンカリングエネルギーのラビング強度依存性 (2013)
  • Author(s): 上田 圭祐, 木村 宗弘, 赤羽 正志
  • Organizer: 2013年日本液晶学会討論会
  • Place of Presentation: 大阪大学、豊中
• [Presentation] スリットコータで作製したＬＣＤの配向パラメータの評価 (2013)
  • Author(s): 山本 卓也, 長瀧 征弥, Thet Naing Oo, 木村 宗弘, 赤羽 正志
  • Organizer: 2013年日本液晶学会討論会
  • Place of Presentation: 大阪大学、豊中
• [Presentation] 高分子安定化ブルー相液晶における極角アンカリングエネルギーについての一考察 (2013)
  • Author(s): 松本 崇裕, 山名 達, Thet Naing Oo, 菊池 裕嗣, 木村 宗弘, 赤羽 正志
  • Organizer: 2013年日本液晶学会討論会
  • Place of Presentation: 大阪大学、豊中
• [Presentation] Effect of Surface Alignment on the Stability and Electro-Optical Properties of Blue Phase LC (2013)
  • Author(s): Itaru Yamana, Thet Naing Oo, Hirotsugu Kikuchi, Munehiro Kimura, Tadashi Akahane
  • Organizer: 20th International Display Workshop
  • Place of Presentation: 札幌コンベンションセンター
• [Presentation] Study of Electro-Optical Properties of LC/Reactive Mesogen Coated LCD Fabricated by Slit Coater (2013)
  • Author(s): Yukihiro Nagataki, Thet Naing Oo, Katsuyoshi Miyashita, Hajime Hirata, Munehiro Kimura, Tadashi Akahane
  • Organizer: 20th International Display Workshop
  • Place of Presentation: 札幌コンベンションセンター
• [Book] Anisotropic Nanomaterials: Preparation, Properties, and Applications (2015)
  • Author(s): Munehiro Kimura（分担執筆）
  • Total Pages: 250
  • Publisher: Springer
• [Book] 薄膜塗布技術と乾燥トラブル対策 (2014)
  • Author(s): 木村宗弘（分担執筆）
  • Publisher: 技術情報協会