Electrooptical properties of free-standing polymer-stabilized ferroelectric liquid crystal films

Hideo Fujikake, Takeshi Murashige, Jun Yonai, Hiroshi Kikuchi, Masahiro Kawakita, Kuniharu Takizawa

Research output: Contribution to journalArticlepeer-review

Abstract

We evaluated the electrooptical properties of free-standing films based on ferroelectric liquid crystals stabilized by a rigid aligned polymer network in anticipation of future development of lightweight, large-area flexible film displays. It was shown that the mechanical strength of the film increased at higher concentration of added monomer, while the speed of electrooptical response declined. This could be a result of restricted switching of the liquid crystal molecules due to their interaction with the surface of the solidified polymer. Although the contrast ratio decreased at higher polymer concentrations, when the concentration of the dispersed polymer was high enough to provide free-standing ability, 100:1 or higher contrast ratios were achieved. In addition, the threshold voltage required for liquid crystal molecular switching was spatially changed due to polymer dispersion, resulting in the appearance of a grayscale display function.

Original languageEnglish
Pages (from-to)35-42
Number of pages8
JournalElectronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi)
Volume85
Issue number5
DOIs
Publication statusPublished - 2002 May 1
Externally publishedYes

Keywords

  • Ferroelectric liquid crystal
  • Flexible film display
  • Free-standing film
  • Polymer network

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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