Electro-optic response characteristics of a dual particle electrophoretic display system

Yong Hwan Ahn, Geun Chae Yu, Young Chul Kim, Sang-Soo Lee, Junkyung Kim

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Abstract

Electrophoretic nanoparticles of polystyrene (PS)-encapsulated red pigments were prepared by an emulsifier-free in-situ emulsion polymerization method and the zeta potential of the red nanoparticles was +190 mV. We demonstrated a dual particle electrophoretic display (DPEPD) system with red and white contrast using the positively charged PS-encapsulated red pigment particles and the negatively charged white particles of rutile titanium dioxide. The scattering light intensity ratio of the white and red images was ∼1.7 but we could clearly observe the reversible color change between red and white when the polarity of the applied electric field was switched. 4 The turn-on and turn-off response times of the device were measured to be ∼750 and ∼650 ms, respectively, when +1.4 and -1.4V/μm DC field were alternately applied to the front electrode.

Original languageEnglish
Pages (from-to)322-327
Number of pages6
JournalMolecular Crystals and Liquid Crystals
Volume492
DOIs
Publication statusPublished - 2008 Oct 30

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Keywords

  • Dual particle system
  • Electric-optic response characteristics
  • Electrophoretic display
  • Polymer-inorganic hybrid nanoparticles

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Science(all)

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