Dual mode operation of fast switching liquid crystal devices

Dong Han Song; Jung-Wook Kim; Min-Gyeong Jo; Ki-Han Kim; Ji-Hoon Lee; Tae-Hoon Yoon

doi:10.1117/12.913423

6 February 2012 Dual mode operation of fast switching liquid crystal devices

Dong Han Song, Jung-Wook Kim, Min-Gyeong Jo, Ki-Han Kim, Ji-Hoon Lee, Tae-Hoon Yoon

Proceedings Volume 8280, Advances in Display Technologies II; 828008 (2012) https://doi.org/10.1117/12.913423
Event: SPIE OPTO, 2012, San Francisco, California, United States

Abstract

We studied two types of bistable liquid crystal devices that can be operated in the memory mode as well as in the dynamic mode. One of them is a pixel-isolated twist-splay nematic LC cell that has two stable states of π- twist and splay. Polymer walls are formed at pixel boundaries by anisotropic phase separation between nematic liquid crystals and reactive mesogens. Operation in the memory mode can be achieved through bistable switching between the splay and π-twisted states. The other one is a bistable twisted-nematic mode that has two stable states of -π/2 and +π/2 twist. Three-terminal electrodes are used to apply both vertical and in-plane electric field to both devices. The proposed bistable modes has an infinite memory time and the fast transition time compared to other bistable liquid crystal modes.

Citation Download Citation

Dong Han Song, Jung-Wook Kim, Min-Gyeong Jo, Ki-Han Kim, Ji-Hoon Lee, and Tae-Hoon Yoon "Dual mode operation of fast switching liquid crystal devices", Proc. SPIE 8280, Advances in Display Technologies II, 828008 (6 February 2012); https://doi.org/10.1117/12.913423

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