公开(公告)号：US10725328B2

公开(公告)日：2020-07-28

申请号：US16466457

申请日：2017-06-29

申请人： PEKING UNIVERSITY

发明人： Huai Yang ,  Xiao Liang ,  Mei Chen ,  Shumeng Guo ,  Lanying Zhang ,  Cuihong Zhang ,  Qian Wang ,  Chenyue Li ,  Cheng Zou

IPC分类号： G02F1/1334 ,  C09K19/54 ,  G02F1/13 ,  G02F1/1333 ,  C09K19/52

摘要： The present invention relates to a temperature-controlled dimming film with a function of shielding near-infrared light, which comprises a polymer network skeleton and liquid crystal molecules, wherein the polymer network skeleton consists of a polymer-dispersed liquid crystal network structure and a polymer-stabilized liquid crystal network structure and comprises a polymer matrix with pores inside which polymer networks are vertically aligned; and the liquid crystal molecules are dispersed in the polymer network skeleton and have smectic (SmA)-cholesteric (N*) phase transition. Between the skeleton and the liquid crystal molecules, nanoparticles, having absorption at 800-3000 nm, are dispersed. In the invention, a stepwise polymerization method is utilized to construct a PD&SLC network structure between two substrates, which greatly improve the bonding strength between the two substrates and the heat insulation performance of the temperature-controlled liquid crystal dimming film.

公开(公告)号：US12066706B2

公开(公告)日：2024-08-20

申请号：US18330486

申请日：2023-06-07

申请人： PEKING UNIVERSITY

发明人： Huai Yang ,  Xiao Wang ,  Lanying Zhang

IPC分类号： G02F1/1334 ,  C09K19/54 ,  G02F1/1341 ,  G02F1/137

CPC分类号： G02F1/13345 ,  C09K19/544 ,  G02F1/1341 ,  G02F1/137 ,  G02F2203/48

摘要： A liquid crystal/polymer composite electrically controlled dimming film is provided, including a liquid crystal material, a polymer matrix, and two layers of conductive substrates. The polymer matrix is sandwiched between the two layers of conductive substrates, and the polymer matrix has a porous microstructure. The liquid crystal material is dispersed in the polymer matrix to form liquid crystal microdroplets, and the liquid crystal microdroplets have vertically oriented polymer networks. The liquid crystal/polymer composite electrically controlled dimming film has a unique composite microstructure. In this composite microstructure, the polymer matrix of the porous microstructure gives the film with good mechanical processing performance. In addition, the vertically oriented polymer networks in the liquid crystal microdroplets further reduces the orientation difficulty of liquid crystal molecules, which is conducive to reducing the driving voltage of the liquid crystal/polymer composite electrically controlled dimming film, and is suitable for large area processing and production.