The present invention relates to polymerizable compounds, to processes and intermediates for the preparation thereof, and to the use thereof for optical, electro-optical and electronic purposes, in particular in liquid-crystal (LC) media and LC displays, especially in LC displays of the PS (polymer sustained) or PSA (polymer sustained alignment) type.

The present invention relates to a liquid crystal (LC) medium comprising polymerisable compounds, to a process for its preparation, to its use for optical, electro-optical and electronic purposes, in particular in LC displays, and to LC displays comprising it.

Provided is a polar compound having high chemical stability, high capability of aligning liquid crystal molecules, high solubility in a liquid crystal composition, and a large voltage holding ratio when used in a liquid crystal display device. The compound is represented by formula (1): ##STR00001##
in which, for example, R.sup.1 is alkyl having 1 to 15 carbons; MES is a mesogen group having at least one ring; Sp.sup.1 is a single bond or alkylene having 1 to 10 carbons; M.sup.1 and M.sup.2 are hydrogen; and R.sup.2 is a group represented by formulas (1a) to (1c): ##STR00002##
in which, Sp.sup.2 and Sp.sup.3 are a single bond or alkylene having 1 to 10 carbons; S.sup.1 is >CH; S.sup.2 is >C<; and X.sup.1 is OH.

The invention provides an organic EL display device that, even if bent, is not prone to plastic deformation and has improved moisture blocking characteristics. An organic EL display device includes: a glass substrate; an organic EL layer formed on an upper side of the glass substrate; and a support substrate glued on a lower side of the glass substrate via a first adhesive. Recessed portions or projecting portions are formed on the glass substrate at a side thereof facing the support substrate. The recessed portions or a space between each of the projecting portions is filled with the first adhesive.

The invention provides an organic EL display device that, even if bent, is not prone to plastic deformation and has improved moisture blocking characteristics. An organic EL display device includes: a glass substrate; an organic EL layer formed on an upper side of the glass substrate; and a support substrate glued on a lower side of the glass substrate via a first adhesive. Recessed portions or projecting portions are formed on the glass substrate at a side thereof facing the support substrate. The recessed portions or a space between each of the projecting portions is filled with the first adhesive.

To show a liquid crystal composition containing a polymerizable compound, to exhibit excellent persistence characteristics and display unevenness characteristics, a liquid crystal display device including such a composition, and an optical device. To show a liquid crystal composition containing the polymerizable compound and satisfying at least one of characteristics such as high maximum temperature, low minimum temperature, small viscosity, suitable optical anisotropy, large negative dielectric anisotropy and large specific resistance; and an AM device having characteristics such as a small persistence ratio, a short response time, a low threshold voltage, a large voltage holding ratio, a large contrast ratio and a long service life. The liquid crystal composition contains as a first component a polymerizable monomer that has a capability of a hydrogen bond donor and can form a hydrogen bond with an alignment film surface, or an oligomer, a prepolymer or a polymer of the monomer.

The invention relates to a liquid-crystalline medium and to the use thereof for an active-matrix display, in particular based on the VA, PSA, PS-VA, PM-VA, SS-VA, PALC, IPS, PS-IPS, FFS or PS-FFS effect.

Provided are a liquid crystal composition satisfying at least one of characteristics such as high maximum temperature, low minimum temperature, small viscosity, suitable optical anisotropy and large dielectric anisotropy, or the liquid crystal composition having a suitable balance regarding at least two of the characteristics; and an AM device including the composition. The liquid crystal composition contains a specific compound having small optical anisotropy as a first component, and a specific compound having positive dielectric anisotropy as a second component, and may contain a specific compound having high maximum temperature or small viscosity as a third component, a specific compound having positive dielectric anisotropy as a fourth component, or a specific compound having negative dielectric anisotropy as a fifth component.

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-crystalline medium, in particular based on a mixture of polar compounds, having compounds of formulae Y, CY, PY and/or LY, and compounds of formula S1 and/or S2: ##STR00001##