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Optics Letters

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  • Vol. 36, Iss. 11 — Jun. 1, 2011
  • pp: 2077–2079

Dual-mode operation of a twisted nematic liquid crystal cell by switching between dynamic and memory modes

Dong Han Song, Ki-Han Kim, Jung-Wook Kim, Jae Chang Kim, and Tae-Hoon Yoon  »View Author Affiliations


Optics Letters, Vol. 36, Issue 11, pp. 2077-2079 (2011)
http://dx.doi.org/10.1364/OL.36.002077


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Abstract

We propose a twisted nematic liquid crystal device that can be operated in dynamic or memory mode, based on the information content to be displayed at that time. + 90 ° -twisted and 90 ° -twisted states are used as two stable states for operation in the memory mode. A vertical electric field is applied to realize gray levels for operation in the dynamic mode. The proposed device has a memory retention time of over a month for the memory mode and a response time of 12 ms for the dynamic mode. Contrast ratios of over 500 1 can be obtained in both the dynamic and memory modes.

© 2011 Optical Society of America

OCIS Codes
(230.0230) Optical devices : Optical devices
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Optical Devices

History
Original Manuscript: February 9, 2011
Revised Manuscript: April 11, 2011
Manuscript Accepted: April 22, 2011
Published: May 27, 2011

Citation
Dong Han Song, Ki-Han Kim, Jung-Wook Kim, Jae Chang Kim, and Tae-Hoon Yoon, "Dual-mode operation of a twisted nematic liquid crystal cell by switching between dynamic and memory modes," Opt. Lett. 36, 2077-2079 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-11-2077


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