The present invention relates to an optically anisotropic sheet comprising a substrate and a liquid crystal cured layer laminated together, wherein the substrate has a surface roughness of 1.0 nm or less in a field of view of 1 μm.sup.2 and a water contact angle of 70° or more.

An optical film is provided and has retardations satisfying relations (1) to (3): (1) 0≦Re(550)≦10; (2) −25≦Rth(550)≦25; and (3) |I|+|II|+|III|+|IV|>0.5 (nm),
with definitions: I=Re(450)−Re(550); II=Re(650)−Re(550); III=Rth(450)−Rth(550); and IV=Rth(650)−Rth(550),
wherein Re(450), Re(550) and Re(650) are in-plane retardations measured with lights of wavelength of 450, 550 and 650 nm, respectively; and Rth(450), Rth(550) and Rth(650) are retardations in a thickness direction of the optical film, which are measured with lights of wavelength of 450, 550 and 650 nm, respectively.

A backlight unit for a liquid crystal display device, the backlight unit including: an light emitting diode (“LED”) light source; a light conversion layer disposed separate from the LED light source to convert light emitted from the LED light source to white light and to provide the white light to the liquid crystal panel; and a light guide panel disposed between the LED light source and the light conversion layer, wherein the light conversion layer includes a semiconductor nanocrystal and a polymer matrix, and wherein the polymer matrix includes a first polymerized polymer of a first monomer including at least two thiol (—SH) groups, each located at a terminal end of the first monomer, and a second monomer including at least two unsaturated carbon-carbon bonds, each located at a terminal end of the second monomer.

The invention relates to a liquid crystal display panel and a method for preparing the same, and a display device. The liquid crystal display panel comprises: a color filter substrate, and a black matrix, an RGB blocking layer, a planarization layer and that are formed in turn on the color filter substrate, and a TFT substrate, wherein, an ultraviolet absorbent is added to a raw material gel of the planarization layer and/or an RGB blocking material, and when the ultraviolet absorbent is added to the raw material gel of the planarization layer, the area of the planarization layer is no larger than that of a region sealed by the seal agent. Abnormal color development on the effective display region may be effectively avoided without employing a UV mask required in the display device of the present invention.

The optical multilayer film, which comprises a laminate in which a base layer, a primer layer, and a hard coat layer are sequentially laminated, has enhanced mechanical properties while preventing rainbow stains and a reduction in the visibility by adjusting the in-plane retardation of the base layer and the refractive indices of the respective layers. Thus, the optical component and the display device, which comprise the optical multilayer film, have excellent optical characteristics and can operate normally even in harsh environments.

A compensation film includes: a first retardation layer including a polymer; a second retardation layer including a liquid crystal having positive birefringence; and a compensation layer including a liquid crystal having a vertical alignment property, where an angle between slow axes of the first and second retardation layers is in a range of about 85 to about 95 degrees, an entire in-plane retardation (R.sub.e0) of the first retardation layer, the second retardation layer and the compensation layer for wavelengths of 450 nm, 550 nm and 650 nm satisfy the following inequation: R.sub.e0(450 nm)<R.sub.e0(550 nm)<R.sub.e0(650 nm), an in-plane retardation (R.sub.e3) of the compensation layer for the incident light having a wavelength of about 550 nm is in a range of about zero to about 50 nm, and a thickness direction retardation (R.sub.th3) of the compensation layer for the incident light is less than zero.

A flexible display module according to the present application includes a number of module material layers superposed; and at least one strain isolation layer disposed between the two adjacent the module material layers. The strain isolation layer includes a chamber and an elastic material layer surrounding an outer periphery of the chamber.

An optical film includes a cholesteric liquid crystal layer formed in a stripe-shaped pattern in which an optically anisotropic region having optical anisotropy and an optically isotropic region having optical isotropy are alternately disposed, a helical axis of a cholesteric liquid crystal in the optically anisotropic region is oriented in one axial direction tin a plane of the optical film, and the helical axis is oriented in a normal direction t of a boundary surface between the optically anisotropic region and the optically isotropic region.

A polymerizable composition provides a high brightness and suppressed decrease in brightness in an outer peripheral region when used in a wavelength conversion member, a wavelength conversion member, a backlight unit, and a liquid crystal display device. The polymerizable composition includes quantum dots having surfaces coordinated with a ligand, a polymerizable compound, and a dispersant, in which the ligand is a molecule that includes a saturated hydrocarbon chain having 6 or more carbon atoms and a coordinating group, a Log P value of the polymerizable compound is 3.0 or lower, the dispersant has a nonpolar and a polar portion in a molecule, and the nonpolar portion is at least one selected from the group consisting of a saturated hydrocarbon chain having 6 or more carbon atoms, an aromatic ring, and a saturated aliphatic ring. The wavelength conversion member, the backlight unit, and the liquid crystal display device include the polymerizable composition.

A backlight unit including: a light source; and a photoconversion layer disposed separately from the light source to convert a wavelength of incident light from the light source and thereby provide converted light, wherein the photoconversion layer includes a polymer matrix and a plurality of anisotropic semiconductor nanocrystals disposed in the polymer matrix, and wherein the polymer matrix includes a polymer having a repeating unit represented by Chemical Formula 1:

##STR00001## wherein R.sup.1 is hydrogen or a methyl group, each R.sup.2 is independently hydrogen or a C1 to C3 alkyl group, and R.sup.3 is a C2 to C5 alkyl group, wherein the polymer exhibits elasticity at a temperature between a glass transition temperature of the polymer and about 100° C., and wherein the plurality of anisotropic semiconductor nanocrystals are aligned along a long axis thereof for the photoconversion layer to emit polarized light.