Fabrication of guest-host display based on patterned assembly of liquid crystal

NA Ze-sheng; LIU Xuan; SUN Pei-zhi; WANG Xiao-qian; ZHENG Zhi-gang

doi:10.37188/CJLCD.2023-0147

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Fabrication of guest-host display based on patterned assembly of liquid crystal

Device Physics and Device Preparation | 更新时间：2023-08-10

- Fabrication of guest-host display based on patterned assembly of liquid crystal
- Chinese Journal of Liquid Crystals and Displays Vol. 38, Issue 8, Pages: 1014-1021(2023)
- 作者机构：
  
  1.华东理工大学材料科学与工程学院，上海 200237
  2.华东理工大学物理学院，上海 200237
- 作者简介：
- 基金信息：
  
  National Key Research and Development Program of China(2022YFA1203700);National Science Foundation of China(61822504;62275081;51873060;62035008);Innovation Program of Shanghai Municipal Education Commission(2021-01-07-00-02-E00107);“Shuguang Program” of Shanghai Education Development Foundation and Shanghai Municipal Education Commission(21SG29)
- DOI：10.37188/CJLCD.2023-0147
  CLC： O753⁺.2
- Received：17 April 2023，
  
  Revised：10 May 2023，
  
  Published：05 August 2023
- 稿件说明：
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NA Ze-sheng, LIU Xuan, SUN Pei-zhi, et al. Fabrication of guest-host display based on patterned assembly of liquid crystal[J]. Chinese journal of liquid crystals and displays, 2023, 38(8): 1014-1021.
DOI：

NA Ze-sheng, LIU Xuan, SUN Pei-zhi, et al. Fabrication of guest-host display based on patterned assembly of liquid crystal[J]. Chinese journal of liquid crystals and displays, 2023, 38(8): 1014-1021. DOI： 10.37188/CJLCD.2023-0147.

摘要

宾主液晶器件能够在保持视野清晰的前提下实现对光透过率的调节，已被广泛应用于透明显示领域。但由于其系统复杂，在一定程度上限制了实际应用。本文通过采用区域化聚合物模板技术，制备了一种分子平行组装和螺旋组装共存的图案化宾主液晶器件。基于两区域对外界刺激响应的差异性，调节电场和偏振方向可实现图案多灰度动态显示。结果表明：在电场控制模式下，染料液晶平行组装区域的光透过率从3.28%上升到63.22%，两区域的透过率对比度从0.41提高到5.12。在偏振方向控制模式下，平行组装区域的光透过率从3.28%升至65.45%，两区域的对比度从0.41升至4.54。所制备的宾主液晶器件具备结构简单、易于调谐等特点，可适应于不同场景下的图案显示，进一步推动了液晶器件在透明显示领域及光学防伪领域的应用和发展。

Abstract

Guest-host liquid crystal devices have attracted significant attention in see-through display due to their ability to control the transmittance of light without sacrificing the resolution of image. However， such complicated systems limite their contributions in practical applications. Herein， we propose a novel guest-host liquid crystal device for transparent display， with the coexistence of parallel and helical assembled microstructure fabricated by patterned polymer template. By applying an electrical field or rotating the linear polarization of incident light， the dynamic multi-grayscale patterns have been achieved owing to the distinct responses of different regions. The experimental results indicate that， under the driving voltage， the transmittance of parallel microstructure regions increases from 3.28% to 63.22%， and meanwhile the contrast ratio between the two regions increases from 0.41 to 5.12. By changing the linear polarization of incidence， the transmittance of parallel region increases from 3.28% to 65.45%， and the contrast ratio also increases from 0.41 to 4.54. The proposed guest-host liquid crystal device is capable for patterned display in various scenarios due to its simple configuration and convenient tunability， thus making further advances offer more brilliant liquid crystal devices in diversified fields.

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references

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