Basic Research on Structures and Materials of Rubber-Like Liquid Crystal Displays

2015 Fiscal Year Final Research Report

• Project/Area Number: 26630143
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Electron device/Electronic equipment
• Research Institution: Tohoku University
• Principal Investigator: FUJIKAKE HIDEO 東北大学, 工学(系)研究科(研究院), 教授 (20643331)
• Co-Investigator(Kenkyū-buntansha): ISHINABE Takahiro 東北大学, 大学院工学研究科, 准教授 (30361132)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: フレキシブルディスプレイ / 液晶ディスプレイ / 液晶・高分子複合膜 / 光重合相分離 / 分子配向制御

Outline of Final Research Achievements

In future information-based society, a rubber-like super-flexible display is expected for providing various information in all living environment. To realize a substrate-free super-flexible liquid crystal display with high-contrast image and its fabrication process, we irradiated a molecular-aligned solution of liquid crystal and monomer in substrate gap with patterned ultra-violet light. As a result, a phase-separated composite film of liquid crystal and polymer was formed, where molecular alignment was not changed. In this composite film, liquid crystal droplets were formed in polymer with twisted alignment, and light modulation effect was confirmed under applied voltage. We could control liquid crystal droplet morphology, by changing ultra-violet intensity, solution temperature and optical mask pattern in curing polymer. The self-standing composite film, which was formed with more-rigid polymer and thin surface-reinforcing films, could be exfoliated from glass substrates.

Free Research Field

画像電子工学