We describe wide temperature range bimesogenic chiral nematic liquid crystals with high flexoelectro-optic coefficients
(e/K),of the order of 2.0 CN-1 m-1, high switching angles, > 160° and 50-100μs response times, which may be used to give
gray scale devices in both the ULH texture, with an optimum optical in plane switch of 45° at fields of 2Vμm-1 depending
on helix pitch and suitable for LCoS devices, and in the USH or Grandjean texture with a unique optically isotropic "field
off" black state and contrast ratios of > 5000:1, using "in plane" electric fields, with switching times of the order of 200μs.
The new materials and devices give μs level to level switching and the real potential for colour filter free frame sequential
colour switching. Highly reflective Blue Phase devices, stable over a 90°C temperature range, in which an electric field is
used to switch the reflection from red to green, for example, will be described. Full RGB reflections may be obtained with
switching times of a few milliseconds. New surface and volume activated reflecting N* Grandjean texture devices will also
be described. Visible wavelength shifts of ~100nm are reported. These are activated by so called "command" surfaces or
nanoscopic ferroelectric inclusions and conventional transverse electric fields. Finally we will briefly mention potential
applications including high efficiency RGB liquid crystal laser sources.