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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
  • *Corresponding author for this work
  • Pusan National University

Research output: Contribution to conferenceConference paperpeer-review

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.

Original languageEnglish
Title of host publicationAdvances in Display Technologies II
DOIs
StatePublished - 2012
EventAdvances in Display Technologies II - San Francisco, CA, United States
Duration: 2012.01.252012.01.26

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8280
ISSN (Print)0277-786X

Conference

ConferenceAdvances in Display Technologies II
Country/TerritoryUnited States
CitySan Francisco, CA
Period12.01.2512.01.26

Keywords

  • bistable
  • dual mode
  • dynamic mode
  • liquid crystal display
  • memory mode

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