Structural Control of Polymer Wall Spacers for High Quality Flexible Blue-Phase Liquid Crystal Displays

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420313
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Electron device/Electronic equipment
• Research Institution: Tohoku University
• Principal Investigator: Ishinabe Takahiro 東北大学, 工学(系)研究科(研究院), 准教授 (30361132)
• Co-Investigator(Kenkyū-buntansha): FUJIKAKE HIDEO 東北大学, 大学院工学研究科, 教授 (20643331)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 液晶ディスプレイ / フレキシブルディスプレイ / コレステリックブルー層 / ポリマー壁 / 配向安定化 / 接合スペーサー / プラスチック基板

Outline of Final Research Achievements

To achieve the high quality flexible liquid crystal displays (LCDs) with wide viewing angle range and high contrast ratio, we have proposed a flexible blue phase LC device sustained by the polymer walls structure inside of the LC cell.
We clarified that the polymer walls structure was successfully fabricated in the flexible blue phase LC cell using plastic substrates by the UV irradiation through a photo mask and low intensity of UV light is effective to realize a rigid wall structure and low driving voltage.In addition, we clarified that the polymer walls structure can suppress the alignment defects appeared in the bending state by reducing the spacer movement caused by the pressure from bended substrates. We successfully achieved the flexible blue phase LC device with high contrast ratio and wide viewing angle range.

Free Research Field

工学