The invention relates to a polymerisable LC medium with flat optical dispersion, a polymer film with flat optical dispersion obtainable from such a medium, and the use of the polymerisable LC medium and polymer film in optical, electro optical, electronic, semiconducting or luminescent components or devices.

The present invention provides a display panel in which deterioration of color tone may be suppressed regardless of the reflectance of the display element. A display panel including a display element (A), a retardation layer (B) positioned upon the light emission surface side of the display element, and a polarizer (C) positioned upon the light emission surface side of the retardation layer, in which the retardation layer (B) has a ?/4 retardation layer (B1), and the in-plane retardation of the ?/4 retardation layer (B1) satisfies the following Condition 1: <Condition 1> The spectral reflectance of the display element is measured by an SCI method, the average reflectance at wavelengths over the range of 400 nm or more and less than 550 nm is obtained as R.sub.1, the average reflectance at wavelengths over the range of 550 nm or more and less than 700 nm is obtained as R.sub.2, and when the value of R.sub.1/R.sub.2 is calculated and obtained as x, the in-plane retardation of the ?/4 retardation layer falls within the range of ?4.6002x+119.24 nm or more and ?4.6002x+129.24 nm or less.

A liquid crystal display includes: a first substrate, a second substrate overlapping the first substrate, a liquid crystal layer positioned between the first substrate and the second substrate and including a plurality of liquid crystal molecules, a first alignment layer positioned between the first substrate and the liquid crystal layer, a second alignment layer positioned between the second substrate and the liquid crystal layer, and a plurality of protrusions positioned at at least one of between the first alignment layer and the liquid crystal layer and between the second alignment layer and the liquid crystal layer, wherein at least one among the plurality of protrusions includes a polymer of a reactive mesogen, and the reactive mesogen is represented by Chemical Formula 1:
P.sub.aA.sub.1OCH.sub.2.sub.nOA.sub.2P.sub.bChemical Formula 1.

A composition contains a compound of formula (1), and a polymerizable liquid crystal compound or a liquid crystalline polymer compound. n represents 1 or 2; Ar.sup.1, Ar.sup.2, and Ar.sup.3 each represent a 1,4-phenylene group or a divalent sulfur-containing aromatic heterocyclic group; At least one of Ar.sup.1 and Ar.sup.2 has a fluorine atom; R.sup.1 represents a single bond or a group selected from OC(?O), C(?O)O, C?C, CH?CH, CH?N, N?N, and N?CH; R.sup.2 represents an alkylamino group or an alkoxy group; R.sup.3 represents a group selected from an alkanediyl group, an alkanediyloxy group, an alkanediyloxycarbonyl group, and an alkanediylcarbonyloxy group; and R.sup.4 represents a polymerizable group or a hydrogen atom.
R.sup.4R.sup.3Ar.sup.1(R.sup.1Ar.sup.2).sub.nN?NAr.sup.3R.sup.2(1)

The invention relates to a polymerisable LC material comprising at least one di- or multireactive mesogenic compound and at least one compound of formula CO-1,

##STR00001##

wherein R.sup.1, R.sup.2, L.sup.1, L.sup.2, L.sup.3, and n have one of the meanings as given in claim 1. Furthermore, the present invention relates also to a method for its preparation, a polymer film with improved thermal durability obtainable from the corresponding polymerisable LC material, to a method of preparation of such polymer film, and to the use of such polymer film and said polymerisable LC material for optical, electro-optical, decorative or security devices.

A polymerisable oligomeric liquid crystal (LC) and a polymerisable LC medium comprising the polymerisable oligomeric LC together with one or more mono-, di- or multireactive mesogenic compounds. Furthermore, a method for the preparation of the oligomeric LC, a birefringent polymer film obtainable from the polymerisable LC medium, and a method of preparation of such a polymer film. Also, the use of the polymer film as optical component, in particular as ultra-thin polariser (UTP) in a liquid crystal display (LCD), for contrast enhancement in an organic light emitting device (OLED), or for AR/AV/VR applications.

A display device includes a first substrate, a first alignment layer, a second substrate, a second alignment layer, and a display medium. The first alignment layer is disposed on the first substrate. The second substrate is disposed opposite to the first substrate. The second alignment layer is disposed on the second substrate, and the first and second alignment layers are located between the first and second substrates. The display medium is located between the first and second alignment layers, where a surface of the first alignment layer facing the display medium and a surface of the second alignment layer facing the display medium have topographies with irregular areas surrounded by micro-structures. Besides, a manufacturing method of the display device is also provided.

Disclosed herein is a light emitting device and method of manufacturing such a device comprised of a series of photopolymerizable, chiral liquid crystalline layers that can be solvent cast on a substrate. The mixture of chiral materials in each successive layer may be blended in such a way that each layer has the same chiral pitch. Further the chiral materials in each layer may also be blended so that the ordinary and extraordinary refractive indices in each layer match the other layers such that the complete assembly of layers will optically function as a single relatively thick layer of chiral liquid crystal. The chiral nematic material in each layer can spontaneously adopt a helical structure with a helical pitch. The light emitting layers of the light emitting device can further comprise electroluminescent material that emits light into the band edge light propagation modes of the photonic crystal.

A display device with a high aperture ratio is provided. The display device includes, in a pixel, a first transistor, a second transistor, a first insulating layer, a second insulating layer, a conductive layer, a pixel electrode, a layer containing a liquid crystal material, and a common electrode. The first insulating layer is positioned over a channel formation region of the first transistor. The conductive layer is positioned over the first insulating layer. The second insulating layer is positioned over the first transistor, the second transistor, the first insulating layer, and the conductive layer. The pixel electrode is positioned over the second insulating layer, the layer containing a liquid crystal material is positioned over the pixel electrode, and the common electrode is positioned over the layer containing a liquid crystal material. The common electrode overlaps with the conductive layer with the layer containing a liquid crystal material and the pixel electrode therebetween. The pixel includes a first connection portion where the conductive layer is electrically connected to the first transistor and a second connection portion where the pixel electrode is electrically connected to the second transistor. The conductive layer, the pixel electrode, and the common electrode each have a function of transmitting visible light.

A laminate including a vertically oriented liquid crystal cured film and a horizontally oriented phase difference film is provided. The vertically oriented liquid crystal cured film is a cured product of a polymerizable liquid crystal composition containing a polymerizable liquid crystal compound and a dichroic coloring matter. The composition includes, as the dichroic coloring matter, at least one type of dichroic coloring matter having maximum absorption between a wavelength of 400 nm and a wavelength of 750 nm. The vertically oriented liquid crystal cured film is a cured product of the polymerizable liquid crystal composition that is cured in a state in which the polymerizable liquid crystal compound is oriented in a vertical direction with respect to a flat plane of the liquid crystal cured film, and satisfies the following formula (1) and the following formula (2):
0.001?AxC?0.3(1);
AxC(z=60)/AxC>2(2).