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具有步进驱动显示能力的聚合物分散液晶薄膜的制备与应用

Preparation and Application of Polymer-Dispersed Liquid Crystal Film with Step-Driven Display Capability.

作者信息

Lin Hui, Zhao Yuzhen, Jiao Xiangke, Gao Hong, Guo Zhun, Wang Dong, Luan Yi, Wang Lei

机构信息

Xi'an Key Laboratory of Advanced Photo-Electronics Materials and Energy Conversion Device, School of Electronic Information, Xijing University, Xi'an 710123, China.

Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.

出版信息

Molecules. 2024 Mar 1;29(5):1109. doi: 10.3390/molecules29051109.

Abstract

The realization of multifunctional advanced displays with better electro-optical properties is especially crucial at present. However, conventional integral full drive-based transparent display is increasingly failing to meet the demands of the day. Herein, partitioned polymerization as a novel preparation method was introduced innovatively into polymer-dispersed liquid crystals (PDLC) for realizing a step-driven display in agreement with fluorescent dye to solve the above drawback. At first, the utilization of fluorescent dye to endow the PDLC film with fluorescent properties resulted in a reduction in the saturation voltage of the PDLC from 39.7 V to 25.5 V and an increase in the contrast ratio from 58.4 to 96.6. Meanwhile, the experimental observations and theoretical considerations have elucidated that variation in microscopic pore size can significantly influence the electro-optical behavior of PDLC. Then, the step-driven PDLC film was fabricated through the exposure of different regions of the LC cell to different UV-light intensities, resulting in stepwise voltage-transmittance (V-T) responses of the PDLC film for the corresponding regions. Consequently, under appropriate driving voltages, the PDLC can realize three different states of total scattering, semi-transparent and total transparent, respectively. In addition, the PDLC film also embodied an outstanding anti-aging property and UV-shielding performance, which makes it fascinating for multifunctional advanced display applications.

摘要

目前,实现具有更好电光性能的多功能先进显示器尤为关键。然而,传统的基于整体全驱动的透明显示器越来越无法满足当今的需求。在此,作为一种新颖的制备方法,分区聚合被创新性地引入到聚合物分散液晶(PDLC)中,以实现与荧光染料一致的步进驱动显示,从而解决上述缺点。首先,利用荧光染料赋予PDLC膜荧光特性,使PDLC的饱和电压从39.7V降低到25.5V,对比度从58.4提高到96.6。同时,实验观察和理论分析表明,微观孔径的变化会显著影响PDLC的电光行为。然后,通过将液晶盒的不同区域暴露于不同强度的紫外光下,制备出步进驱动的PDLC膜,从而使PDLC膜在相应区域呈现出逐步的电压-透过率(V-T)响应。因此,在适当的驱动电压下,PDLC可以分别实现全散射、半透明和全透明三种不同状态。此外,PDLC膜还具有出色的抗老化性能和紫外线屏蔽性能,这使其在多功能先进显示应用中极具吸引力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5175/10935014/e665298d2e42/molecules-29-01109-g001.jpg

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