Measurement of polar anchoring strength and analysis of the mechanism of surface liquid crystal alignment

• Project/Area Number: 20760004
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Applied materials science/Crystal engineering
• Research Institution: Tohoku University
• Principal Investigator: ISHINABE Takahiro Tohoku University, 大学院・工学研究科, 助教 (30361132)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2008: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
• Keywords: ディスプレイ / 液晶 / 極角アンカリング強度 / 温度依存性 / 多重干渉 / 吸着現象 / 表面配向メカニズム / エリプソメータ / 偏光解析 / 配向面 / 液晶配向メカニズム / 液晶配向分布

Research Abstract

A simple and highly accurate measurement method was devised for the alignment distribution of liquid crystal molecule and surface polar anchoring strength by considering the incident angle dependence of multiple interferences in the homogeneous alignment LC cell. We measured the temperature dependence of the polar anchoring strength on the surface of alignment layers and clarified that the there is a relation between the polar anchoring strength and the LC absorption layer on the surface of alignment layers.

Research Products

• [Journal Article] A Highly Accurate Measurement of Liquid Crystal Material and Device Parameters (2010)
  • Author(s): Takahiro Ishinabe, Tatsuo Uchida
  • Journal Title: Molecular Crystals and Liquid Crystals Volume516 Pages: 211-227
  • Peer Reviewed
• [Journal Article] Highly Accurate Method for Measuring Ordinary and Extraordinary Reflective Indices of Liquid Crystal Materials, Cell Thickness, and Pretilt Angle of Liquid Crystal Cells Using Ellipsometry (2009)
  • Author(s): Yuji Ohno, Takahiro Ishinabe, Tetsuya Miyashita, Tatsuo Uchida
  • Journal Title: Japanese Journal of Applied Physics Vol.48
  • Peer Reviewed
• [Journal Article] High-Precision Measurement of Polar Anchoring Strength and Elastic Constant Ratio using Hybrid Alignment Nematic Cell (2008)
  • Author(s): T. Ishinabe, Y. Ohno, T. Miyashita, T. Uchida
  • Journal Title: Japanese Journal of the Applied Physics Vol.47,No.12 Pages: 8892-8897
  • NAID: 40016389628
  • Peer Reviewed
• [Presentation] 液晶デバイスの配向膜表面における極角アンカリング強度の温度依存性の評価 (2010)
  • Author(s): 吉田悠馬、大野有嗣、石鍋隆宏、宮下哲哉、内田龍男
  • Organizer: 電子情報通信学会発光非発光ディスプレイ研究会
  • Place of Presentation: 福岡
  • Year and Date: 2010-01-29
• [Presentation] Evaluation of the Temperature Dependence of Surface Polar Anchoring Strength in Liquid-crystal Devices (2009)
  • Author(s): Yuma Yoshita, Yuji Ohno, Takahiro Ishinabe, Tetsuya Miyashita, Tatsuo Uchida
  • Organizer: The 16th International Display Workshops
  • Place of Presentation: 宮崎
  • Year and Date: 2009-12-09
• [Presentation] Precise Measurement of the LC Parameters Considering the Multiple Interferences in the LC Cell for the Quantitative Evaluation of LC Devices (2009)
  • Author(s): Takahiro Ishinabe, Yuji Ohno, Tetsuya Miyashita, Tatsuo Uchida
  • Organizer: The 16th International Display Workshops
  • Place of Presentation: 宮崎
  • Year and Date: 2009-12-09
• [Presentation] Establishment of the Quantitative Evaluation of LCDs based on the Precise Measurement of the LC Parameters Considering the Multiple Interference in the LC cell (2009)
  • Author(s): Takahiro Ishinabe, Yuji Ohno, Tetsuya Miyashita, Tatsuo Uchida
  • Organizer: SID International Symposium
  • Place of Presentation: 米国
  • Year and Date: 2009-05-31
• [Presentation] Establishment of the Quantitative Evaluation of LCDs based on the Precise Measurement of the LC Parameters Considering the Multiple Interference in the LC cell (2009)
  • Author(s): 石鍋隆宏、大野有嗣、宮下哲哉、内田龍男
  • Organizer: 2009 SID International Symposium
  • Place of Presentation: 米国・サンアントニオ
  • Year and Date: 2009-05-31
• [Presentation] A Highly Accurate Measurement of Liquid Crystal Material and Device Parameters (2008)
  • Author(s): T. Ishinabe, T. Uchida
  • Organizer: The 4th Japanese-Italian Workshop on Liquid Crystals
  • Place of Presentation: 奈良
  • Year and Date: 2008-07-08
• [Presentation] High-Precision Measurement of Polar Anchoring Strength by the Ellipsometry Analysis of ECB-cell (2008)
  • Author(s): T. Ishinabe, R. Ogawa, Y. Ohno, T. Miyashita, T. Uchida
  • Organizer: The 22nd International Liquid Crystal Conference
  • Place of Presentation: 韓国
  • Year and Date: 2008-07-04