Date

Place

[P1-83]
14:00 ~ 15:30
Title:Nanoparticles with High Permittivity Doped into Nano-Sized Polymer Dispersed Liquid Crystals to Reduce Driving Voltage
Gyu-Yeop Shim, Hyun gyu Kim, Ji-Sub Park, Dong-Jin Lee (Kyungpook Nat'l Univ., Korea), Ji-Ho Baek, Joun-Ho Lee, Byeong Koo Kim (LG Display Co., Ltd., Korea), and Hak-Rin Kim (Kyungpook Nat'l Univ., Korea)
Abstract: Polymer dispersed liquid crystal (PDLC) for realization of flexible displays have beed studied.?In case of traditional PDLC, because of scattering of liquid crystal (LC) droplet, it cannot be used for retardation layer. To reduce the scattering, the size of LC droplet should be decreased and ultimately required to optically isotropic state. In this study, we have carried out the fabrication of nano-sized PDLC and confirmed the transparent PDLC in the initial state. LC droplet size was approximately 80 nanometers (nm). As LC droplet size was decreased, driving voltage was increased. To lower the driving voltage, titanium dioxide (TiO2) nanoparticles was doped in the polymer matrix of the PDLC cell with a high permittivity and size of 10~30 nm. In accordance with the increase in doping concentration of the TiO2?nanoparticles, driving voltage was gradually decreased around 50%, but initial light leakage increased by aggregation of nanoparticles.
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