Electro‐optic effect of phase‐transition liquid crystals separated by polymer network

Hideo Fujikake, Kuniharu Takizawa, Hiroshi Kikuchi

Research output: Contribution to journalArticlepeer-review


A new light‐scattering liquid crystal device of chiral nematic liquid crystal dispersed in three‐dimensional polymer network is proposed. The liquid‐crystal device has been fabricated, and its fundamental electrooptic properties have been examined. Each cholesteric domain of focal conic texture, whose helical axis orients randomly but is fixed by a polymer wall, exhibits phase transition to nematic phase by an applied voltage. Therefore, the device has a high‐speed response (less than 500 μ ms) and high contrast ratio (100 : 1). Also, the device can perform as a stable gray‐scale memory because of its multidomain structure. It has an advantage of self‐supported structure, ease of fabrication of a large‐size device, and no requirement of sealing gap; thus, it is applicable for a full‐color projection display and a high‐speed, large‐area light shutter.

Original languageEnglish
Pages (from-to)90-98
Number of pages9
JournalElectronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi)
Issue number12
Publication statusPublished - 1993


  • Polymer‐dispersed liquid crystal
  • chiral nematic liquid crystal
  • cholesteric‐nematic phase transition
  • polymer network


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