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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 (&lt; 10 V), low haze (&lt; 2%) in the transparent state, high haze (&gt; 90%) in the translucent state, and short switching time (&lt; 2 ms), compared to those of other bistable LC devices, which can be used to control the haze.

Low-power control of haze using a liquid-crystal phase-grating device with two-dimensional polymer walls