Choi Tae-Hoon, Do Su-Min, Jeon Byoung-Gyu, Yoon Tae-Hoon
Opt Express. 2019 Feb 4;27(3):3014-3029. doi: 10.1364/OE.27.003014.
We propose a two-dimensional (2D) polymer-walled liquid-crystal (LC) phase-grating device, which can be used to control the haze with a very low power. 2D polymer walls can be formed in an LC cell through ultraviolet light irradiation while applying an in-plane electric field through phase separation induced by the spatial elastic energy difference. The transparent and translucent states can be realized by applying vertical and in-plane electric fields to the 2D polymer-walled LC cell, respectively. The cell can be operated with a very low power as the transparent [translucent] state is maintained even after the applied vertical [in-plane] electric field is removed. It consumes power only during state switching. The fabricated device exhibits outstanding performances, such as a very low operating voltage (< 10 V), low haze (< 2%) in the transparent state, high haze (> 90%) in the translucent state, and short switching time (< 2 ms), compared to those of other bistable LC devices, which can be used to control the haze.
我们提出了一种二维（2D）聚合物壁液晶（LC）相光栅器件，它可用于以极低的功率控制雾度。通过紫外线照射，在施加面内电场的同时，利用空间弹性能差引起的相分离，可在液晶盒中形成二维聚合物壁。通过分别向二维聚合物壁液晶盒施加垂直电场和面内电场，可实现透明态和半透明态。即使去除施加的垂直[面内]电场后，该液晶盒仍能保持透明[半透明]状态，因此可以以极低的功率运行。它仅在状态切换期间消耗功率。与其他可用于控制雾度的双稳态液晶器件相比，所制备的器件表现出优异的性能，如极低的工作电压（<10V）、透明态下的低雾度（<2%）、半透明态下的高雾度（>90%）以及短切换时间（<2ms）。
