The present disclosure provides an enhanced wavelength converting structure. The enhanced wavelength converting structure includes a first crosslinked cholesteric liquid crystal layer and a plurality of first quantum dots dispersed in the first crosslinked cholesteric liquid crystal layer. When a first light is incident into the enhanced wavelength converting structure, the plurality of first quantum dots are excited and emit a second light of a wavelength different from a wavelength of the first light, and the second light is toned up via multiple reflections in the first crosslinked cholesteric liquid crystal layer. The present disclosure further provides a luminescent film and a display backlighting unit.

To provide a polymerizable liquid crystal compound in order to produce a retardation film having excellent front contrast. A polymerizable liquid crystal composition including a compound represented by Formula (1). ##STR00001## In Formula (1), for example, W.sup.1 is an alkoxycarbonyl group having 1 to 10 carbon atoms, an alkanoyl group having 1 to 10 carbon atoms, or a polymerizable functional group, A.sup.1 is independently 1,4-phenylene or naphthalene-2,6-diyl, Z.sup.1 is a linking group, m and n are independently an integer of 0 to 7, and satisfy 3m+n8, and P.sup.1 is a polymerizable functional group.

The present invention discloses a compound of which a structural formula thereof is represented as the following formula

The compound disclosed by the present invention can be used as a liquid crystal compound and overcomes the problem that solubility of the traditional dibenzothiophene-class liquid crystals is poor, and thus can be better applied to the liquid crystal material field. The present invention further discloses a liquid crystal medium containing the compound and an application thereof.

##STR00001##

The present invention relates to devices for the regulation of light transmission and in particular to switchable windows. The present invention in particular relates to window elements which comprise electrically switchable optical cells with a switchable layer containing a liquid-crystalline medium having a clearing point which is within the working temperature of the window element. The present invention also relates to liquid-crystalline media for use in the window elements.

The invention relates to novel polymerizable liquid crystals of formula (I), to LCP mixtures comprising these compounds and to their uses for optical and electro-optical devices: ##STR00001##
with the proviso the at least one of the polymerisable groups G.sup.1 or G.sup.2 is a naphthalenediyl group.

A compound having large refractive index anisotropy (?n), the effect of increasing the phase transition temperature of a liquid crystal phase, and high solubility, and showing large dielectric anisotropy (??) in a high frequency region, a composition containing the compound, a liquid crystal composition, and a device using the liquid crystal composition. The compound has large refractive index anisotropy ?n, sufficiently high T.sub.n-i, and high compatibility with a liquid crystal composition, and shows large dielectric anisotropy in a high frequency region, and is thus useful for a material of an element of a device such as a high-frequency phase shifter, a phased array antenna, an image recognition device, a distance measuring device, a liquid crystal display device, a liquid crystal lens, a birefringent lens for stereoscopic image display.

The present invention is a liquid crystal composition having negative dielectric anisotropy containing one or two or more of compounds represented by General Formula (i), and is also a liquid crystal display element using the liquid crystal composition. The problem to be solved by the present invention is to provide a liquid crystal composition with a large refractive index anisotropy (n), a low rotational viscosity (.sub.1), a large elastic constant (K.sub.33), a high voltage holding ratio (VHR), and which has a negative dielectric anisotropy (), and a liquid crystal display element which, when using the liquid crystal composition, has a high response speed with excellent display quality in which display defects such as drop marks, burn-in, and display unevenness are absent or suppressed.

The present invention relates to liquid-crystalline media comprising one or more compounds of formula DFS

##STR00001##

in which the groups and parameters occurring have the meanings indicated in claim 1, to high-frequency components comprising same, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, in particular for microwave phased-array antennas. The present invention further relates to novel mesogenic compounds.

The present invention provides a liquid crystal display device which includes a reflective electrode, which achieves its low-voltage driving, and which suppresses flickering caused during its driving and image sticking caused by its long-term driving. The liquid crystal display device of the present invention includes: a first substrate provided with a reflective electrode configured to reflect ambient light; a second substrate facing the first substrate; a liquid crystal layer sandwiched between the first substrate and the second substrate and containing a liquid crystal material that contains a liquid crystal compound containing an alkoxy group and has negative anisotropy of dielectric constant; an alignment film provided on at least one of the first substrate and the second substrate on a side facing the liquid crystal layer; and an aromatic polymer that is present between the liquid crystal layer and the alignment film and/or within the alignment film and has a specific structure.

The invention relates to bimesogenic compounds of formula I ##STR00001##
wherein R.sup.11, R.sup.12, MG.sup.11, MG.sup.12, X.sup.11, X.sup.12 and Sp.sup.1 have the meaning given in claim 1, to the use of bimesogenic compounds of formula l in liquid crystal media and particular to flexoelectric liquid crystal devices comprising a liquid crystal medium according to the present invention.