Date

Place

[P2-62]
14:00 ~ 15:30
Title:Electro-Optical Properties of Dye-Doped Normally Transparent Polymer Network Liquid Crystals
Y.-H. Shin, Y. Jin, N.-S. Oh, C.-W. Jeon, and S.-B. Kwon (Hoseo Univ., Korea)
Abstract: Recently, transmittance variable devices, paticulary with normally transparent and black background properties, for transparent displays have been paid much attention. Polymer dispersed or network liquid crystal (PDLC or PNLC) was thought to be a candidate for them. Dye-doped PDLCs for black background have been much investigated [1-2], but they showed normally dark state. Normally Transparent PDLCs were also investigated by several groups [3-4], but they showed white background. We developed a normally transparent PNLC with black background. It was made by polymer network formation of the cell with liquid crystal-reactive mesogen(RM)-dichroic dye mixture. The liquid crystal molecules were vertically aligned at voltage-off state and randomly oriented after applying voltage. The polymer network formed by RM cotributed to the random orientation. The electro-optical properties of the liquid crystal device dependent on RM and dye composition were investigated. ?The parameter dependent electro-optical properties of the black NT-��PNLCs will be discussed in the presentation.
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