CUED Publications database

Bimesogenic liquid crystals: New materials for high performance flexoelectric and blue phase displays

Coles, HJ (2006) Bimesogenic liquid crystals: New materials for high performance flexoelectric and blue phase displays. SID Conference Record of the International Display Research Conference. pp. 120-123. ISSN 1083-1312

Full text not available from this repository.

Abstract

In this paper we will describe new bimesogenic nematic liquid crystals that have high flexoelectro-optic coefficients (e/K),of the order of 1.5 CN 1 m-1, high switching angles, up to 100° and fast response times, of the order of 100μs or less. We will describe devices constructed, using the ULH texture that may be switched to the optimum angle of 45° for a birefringence based device with the fields of 4Vμm-1 over a wide temperature range. Such devices use an "in plane" optical switching mode, have gray scale capability and a wide viewing angle. We will describe devices using the USH or Grandjean texture that have an optically isotropic "field off" black state, uses "in plane" switching E fields, to give an induced birefringence phase device, with switching times of the order of 20μs. We will briefly describe new highly reflective Blue Phase devices stable over a 50V temperature range in which an electric field is used to switch the reflection from red to green, for example. Full RGB reflections may be obtained with switching times of a few milliseconds. Finally we will briefly mention potential applications including high efficiency RGB liquid crystal laser sources. © 2006 SID.

Item Type: Article
Uncontrolled Keywords: Bimesogen liquid crystals Blue phases Chiral nematic Flexoelectro-optic High contrast ratio Microsecond switching Wide viewing angle displays
Subjects: UNSPECIFIED
Divisions: Div B > Photonics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:01
Last Modified: 27 Nov 2014 19:21
DOI: