用于防伪商标的液晶柔性显示薄膜  

Liquid crystal flexible display film suitable for anti-counterfeiting trademarks

作　　者：吕志伟 桑景新 李唐吾 孙嘉曈 LÜZhiwei;SANG Jingxin;LI Tangwu;SUN Jiatong(College of Information Science and Technology,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学信息科学与技术学院,上海201620

出　　处：《液晶与显示》2024年第3期330-337,共8页Chinese Journal of Liquid Crystals and Displays

基　　金：中央高校基本科研业务费专项基金(DHU特聘青年教授计划)(No.22D210401);上海市松江科委项目(No.19SJKJGG82);国家自然科学基金(No.61805035)。

摘　　要：本文设计了一款机械性能优异和具有独特防伪功能的液晶柔性显示薄膜。首先,基于光控取向技术设计了一款具备双通道显示功能的液晶显示器件,通过光场调控实现两个通道的独立显示。其次,以液晶盒厚度作为对照组确定了最佳厚度,使两个独立图案形成主副显示效果,从而隐藏防伪信息。最后,通过在液晶-聚合物复合材料中掺杂银纳米线(AgNWs)改善了液晶显示薄膜的机械拉伸性能。实验结果表明,在液晶柔性显示薄膜厚度为60μm时,其呈现令人满意的图案显示效果。同时,与未掺杂AgNWs的液晶显示薄膜相比,掺杂了AgNWs的液晶柔性薄膜的模量参数提高了30%以上,具备更大的应力承受能力和应变范围。本研究对于制备信息丰富且稳定性强的液晶防伪商标具有积极意义。This article designs a liquid crystal flexible display film with excellent mechanical properties and unique anti-counterfeiting functions.Firstly,a liquid crystal display device with dual channel display function is designed based on optical orientation technology,which achieves independent display of two channels through light field control.Secondly,using the thickness of the LCD box as the control group,the optimal thickness is determined to enable two independent patterns to form the main and auxiliary display effects,thereby hiding anti-counterfeiting information.Finally,the mechanical tensile properties of liquid crystal display films are improved by doping silver nanowires(AgNWs)into liquid crystal polymer composites.The experimental results show that when the thickness of the liquid crystal flexible display film is 60μm,the liquid crystal film presents a satisfactory pattern display effect.Meanwhile,compared with the liquid crystal display film without AgNWs doping,the modulus parameter of the liquid crystal flexible film doped with AgNWs is increased by more than 30%,and it has a larger stress-bearing capacity and strain range.This study has positive significance for achieving a liquid crystal anti-counterfeiting trademark with rich information and strong stability.

关 键 词：柔性液晶 防伪商标 银纳米线 物理机械特性 

分 类 号：O753.2[理学—晶体学]