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.

The present invention is to provide a polymerizable liquid crystal compound represented by Formula (I);

Q.sup.1-Sp.sup.1A-L.sub.m-1A-Sp.sup.2-Q.sup.2(I)

A represents a divalent nitrogen-containing saturated cyclic group (that may have a substituent) formed by removing two hydrogen atoms from piperidine or piperazine, a phenylene group that may have a substituent, or a trans-1,4-cyclohexylene group that may have a substituent, L represents C(O)O, OC(O), or the like, m represents 3 to 12, Sp.sup.1 and Sp.sup.2 represent an alkylene group having 1 to 20 carbon atoms, any one of Q.sup.1 and Q.sup.2 represents a polymerizable group, Formula (I) has a nitrogen-containing saturated cyclic group and a phenylene group that are directly bonded to each other via C(O)O. By using a polymerizable composition including the polymerizable liquid crystal compound, a film such as a retardation film having low birefringence or a reflection film having high selectivity in a reflection wavelength range can be provided.

Described is a marking for a substrate. The marking comprises at least one luminescent substance (a) and at least one chiral liquid crystal polymer (CLCP) material (b) having a reflection wavelength range that overlaps at least a part of the luminescence wavelength range of (a), provided that at least a part of (b) is not located underneath (a).

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.

The problem that the present invention is to solve is to provide an optical film that has less alignment defects and is less liable to cause variation in the optical characteristics when placed in a high temperature state. The present invention provides an optical film containing a structural unit derived from a specific compound, that is, an optical film containing a structural unit derived from a compound represented by the general formula (I), which has less alignment defects and is less liable to cause variation in the optical characteristics when placed in a high temperature state, and also provides a display device including the optical film.

The present invention provides a polymerizable composition containing: a) a polymerizable compound having one or two or more polymerizable groups and satisfying formula (I)

Re(450 nm)/Re(550 nm)<1.0; and(I)

b) an organic solvent having a solubility parameter (SP value) of 8.50 to 11.00 (cal/cm.sup.3).sup.0.5, a boiling point of 75 to 180 C., and an evaporation rate index of 20 to 700. The present invention also provides an optically anisotropic body, a retardation film, an antireflective film, and a liquid crystal display device that are produced using the polymerizable composition of the present invention. The polymerizable composition of the present invention is useful because it is excellent in solubility and has high storage stability that prevents the occurrence of precipitation of crystals. When the composition is polymerized to produce a film-shaped polymer, uneven application is less likely to occur while the liquid crystal alignment is maintained.

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.

Described is a marking for a substrate. The marking comprises at least one luminescent substance (a) and at least one chiral liquid crystal polymer (CLCP) material (b) having a reflection wavelength range that overlaps at least a part of the luminescence wavelength range of (a), provided that at least a part of (b) is not located underneath (a).

Provided is an optical laminate that has excellent uniformity and is capable of suppressing a change in tint of reflected light during black display in a case where the optical laminate is used for an image display device, and an image display device formed of the optical laminate. The optical laminate includes a light absorption anisotropic layer containing a dichroic substance, a photo-alignment film, and a base material in order, in which the photo-alignment film contains a specific compound having a refractive index of 1.55 to 1.70, and the base material has a glass transition temperature of 150 C. or higher.

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.