An object of the present invention is to provide a compound having an excellent rate of change in HTP caused by exposure. Another object of the present invention is to provide a liquid crystal composition formed of the compound, a cured product, an optically anisotropic body, and a reflective film.

The compound of the present invention is represented by General Formula (1).

##STR00001##

In General Formula (1), a portion where a solid line and a broken line are parallel to each other represents a single bond or a double bond.

In General Formula (1), X.sup.1 to X.sup.8 each independently represent a hydrogen atom or a monovalent substituent. However, at least one of X.sup.1, X.sup.3, X.sup.5, or X.sup.7 and at least one of X.sup.2, X.sup.4, X.sup.6, or X.sup.8 represent a substituent including a group represented by General Formula (2).

##STR00002##

In General Formula (2), Z represents a single bond or —O—. Y.sup.1 and Y.sup.2 each independently represent a hydrogen atom or a hydrocarbon group not including an aryl group. *1 and *2 represent bonding positions.

The invention relates to a liquid-crystalline medium, preferably having a nematic phase and dielectric anisotropy of 0.5 or more, which comprises one or more compounds of formula YX ##STR00001## in which
the parameters have the meanings given in the text,
to the use thereof in an electro-optical display, particularly in an active-matrix display based on the IPS or FFS effect, to displays of this type which contain a liquid-crystalline medium of this type, and to the use of the compounds of formula YX for the improvement of the transmission and/or response times of a liquid-crystalline medium which comprises one or more additional mesogenic compounds.

Polymerizable compounds, to processes and intermediates for the preparation thereof, liquid-crystal (LC) media comprising them, and the use of the polymerizable compounds and LC media for optical, electro-optical and electronic purposes, in particular in LC displays, especially in LC displays of the polymer sustained alignment type, or a stabilizers in LC media and LC displays.

The present invention relates to an LC medium comprising and a liquid-crystalline host consisting of an LC component H) comprising one or more mesogenic or liquid-crystalline compounds and an optically active component D) and optionally a polymerizable component P) comprising one or more polymerizable compounds; and to the use of the polymerizable compounds and LC media for optical, electro-optical and electronic purposes, in particular in LC displays, especially in LC displays of the polymer sustained alignment type.

A liquid-crystal (LC) media having a negative dielectric anisotropy containing a compound of formula I ##STR00001##
and the use of the LC media for optical, electro-optical and electronic purposes, in particular in energy-efficient LC displays, especially in IPS, FFS, VA or PS-VA displays.

The invention relates to novel compositions comprising at least two anisotropic compounds of formula

##STR00001##

as well as to liquid crystalline networks, films and electro-optical devices comprising the compositions.

A liquid-crystal (LC) media having a negative dielectric anisotropy containing a compound of formula I

##STR00001##

and the use of the LC media for optical, electro-optical and electronic purposes, in particular in energy-efficient LC displays, especially in IPS, FFS, VA or PS-VA displays.

The invention relates to a liquid-crystalline medium, preferably having a nematic phase and dielectric anisotropy of 0.5 or more, which comprises one or more compounds of formula YX

##STR00001## in which
the parameters have the meanings given in the text,
to the use thereof in an electro-optical display, particularly in an active-matrix display based on the IPS or FFS effect, to displays of this type which contain a liquid-crystalline medium of this type, and to the use of the compounds of formula YX for the improvement of the transmission and/or response times of a liquid-crystalline medium which comprises one or more additional mesogenic compounds.

A liquid crystal (LC) medium comprising a polymerizable compound, a process for its preparation, its use for optical, electro-optical and electronic purposes, such as LC displays, including LC displays of the polymer sustained alignment (PSA) type, and LC displays, including PSA displays, comprising the LC medium.

A polymerizable compound has a practical low melting point, excellent solubility in a general-purpose solvent, and can produce an optical film at low cost, exhibits low reflected luminance, and achieves uniform conversion of polarized light over a wide wavelength band, an optically anisotropic article.