Chan Chia-Hua, Wu Ting-Yun, Yen Meng-Hua, Lin Chu-En, Cheng Ko-Ting, Chen Chii-Chang
Opt Express. 2016 Dec 26;24(26):29963-29971. doi: 10.1364/OE.24.029963.
Polymer-dispersed liquid crystals (PDLCs) have attracted considerable attention for optical device applications in recent years. However, the high operating voltage of PDLCs limits their applications. This study reports a simple approach used for the first time to decrease the operating voltage of PDLCs by means of doping 3 μm-diameter silver-coated polystyrene microspheres (Ag-coated PSMSs) into PDLCs. Ag-coated PSMSs construct an induced electric field between each other when an external electric field is applied. This induced electric field can enhance the effective electric field so the operating voltage can be actively reduced from 77 V to 40 V. Such PDLCs also possess a high contrast ratio of >50 and a high on-state transmittance of ~73%. Therefore, PDLCs doped with Ag-coated PSMSs maintain a high contrast ratio and improve their electro-optical properties.
近年来，聚合物分散液晶（PDLCs）在光学器件应用方面备受关注。然而，PDLCs的高工作电压限制了它们的应用。本研究首次报道了一种简单的方法，即通过将直径为3μm的银包覆聚苯乙烯微球（Ag包覆PSMSs）掺杂到PDLCs中来降低其工作电压。施加外部电场时，Ag包覆PSMSs相互之间会构建一个感应电场。这个感应电场可以增强有效电场，从而使工作电压能从77V有效降低到40V。此类PDLCs还具有大于50的高对比度和约73%的高导通态透过率。因此，掺杂了Ag包覆PSMSs的PDLCs保持了高对比度并改善了其电光性能。
