Bistable switching of twist direction in a twisted-nematic liquid crystal cell

Dong Han Song; Joong Ha Lee; Seung Ju Lee; Sang-il Kim; Soonkwon Lim; Sung Tae Shin; Jae Chang Kim; Tae-Hoon Yoon
August 2010
Applied Physics Letters;8/9/2010, Vol. 97 Issue 6, p063501
Academic Journal
We propose a bistable liquid crystal mode based on switching of the twist direction in a conventional π/2-twisted nematic cell. Switching between the -π/2 and +π/2 twist states can be performed by applying vertical and/or in-plane electric fields. The proposed bistable mode has an infinite memory time because the two stable twist states have the same elastic free energy.


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