KIEE International Transactions on Electrophysics and Applications

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

Switchable Holographic Polymer Dispersed Liquid Crystals for Full Color-Reflective Display

  • Cho, Young-Hee (Department of Polymer Science & Eng., Pusan National University) ;
  • Kim, Byung-Kyu (Department of Polymer Science & Eng., Pusan National University) ;
  • Kim, Jae-Chang (Department of Electronic Eng., Pusan National University)
  • 발행 : 2001.09.01
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초록

Reflective holographic polymer dispersed liquid crystal(HPDLC) device has a multilayer structure consisting of alternate layers of polymer and liquid crystal droplets. Periodic modulation of a refractive index reflects light of a specific wavelength in accordance with Braggs law. Samples cured isotropically were illuminated with an Argon-ion lase at 514nm. We optimized the reflcetion efficiency of HPDLC as a function of monomer functionality, LC composition and irradiation intensity. The properties of the HPDLC films were observed by UV-visible spectroscopy. We found that the maximum reflection efficiency depends on the monomer functionality, LC composition, and laser intensity. We expect these films could be used in full-color reflective display by stacking them to obtain a mixture of colors.

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