Bend-mode liquid crystal cells stabilized by aligned polymer walls

Hiroshi Kikuchi, Hirofumi Yamamoto, Hiroto Sato, Masahiro Kawakita, Kuniharu Takizawa, Hideo Fujikake

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

We have studied ways of stabilizing the bend configuration in π-cells by forming polymer walls. This novel device with polymer walls, which makes an initial splay-bend transition unnecessary, incorporates minute structures fabricated by applying the processes of local photopolymerization-induced phase separation and electric field orientation. In fabricating the device, a mixed solution of nematic liquid crystal and an ultraviolet (UV)-curable liquid-crystalline monomer was subjected to an electric field to induce the bend transition, and UV light was illuminated on selected regions in this mixed solution to cause photopolymerization, so that minute aligned polymer walls could be selectively formed inside the device. We examined the operation of the device and found that the bend-alignment cells performed basic functions in the stable bend state, and that this state can be maintained even if the cells are set to a small pre-tilt angle, such as 1°.

Original languageEnglish
Pages (from-to)981-989
Number of pages9
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume44
Issue number2
DOIs
Publication statusPublished - 2005 Feb 1
Externally publishedYes

Keywords

  • Bend configuration
  • Bend transition
  • Nematic liquid crystal
  • Optically compensated bend
  • Polymer stabilization
  • Polymer wall
  • UV-curable liquid crystalline monomer
  • π-cell

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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