Abstract: The present invention provides: (I) a display device including a display panel, a retardation layer, and a polarizer which are stacked in the stated order from a back surface side to a viewing surface side and integrated without an adhesive layer; and (II) a method for producing a display device including: forming a first alignment film on a display panel, applying a solution containing first polymerizable liquid crystal to the first alignment film, and curing the first polymerizable liquid crystal to produce a retardation layer; and forming a second alignment film on the retardation layer, applying a solution containing second polymerizable liquid crystal and a dichroic material to the second alignment film, and curing the second polymerizable liquid crystal to produce a polarizer.

Abstract: There is provided an optical device which realizes sufficient contrast or visibility, with a simple configuration. The optical device includes: a light guiding layer; a first optically functional layer provided on a first principal face of the light guiding layer; a second optically functional layer provided on a second principal face of the light guiding layer that is on an opposite side to the first principal face; and an optical medium layer provided on a surface of the second optically functional layer that is on an opposite side to the light guiding layer. A refractive index of the first optically functional layer is lower than a refractive index of the light guiding layer.

Abstract: The present invention provides a method for producing a retardation film excellent in retardation controllability against heat and the retardation film. The method for producing a retardation film includes, in the following order: fixing an alignment of liquid crystal compounds to form a retardation giving layer, and heating the retardation giving layer. Preferably, the heating is first heating and the method further includes second heating for heating the retardation giving layer after the first heating.

Abstract: There is provided an optical member and a light guide system each of which is capable of further thinning, and is achieved to emit light having high brightness and excellent in color reproducibility and uniformity. An optical member of the present invention includes: a light guide plate having a first main surface and a second main surface; a wavelength conversion layer, which is arranged near one end portion of the first main surface of the light guide plate, and is configured to convert a wavelength of light in an ultraviolet to blue region entering the wavelength conversion layer from an opposite side to the light guide plate, to thereby guide the light to the light guide plate; and a first reflective plate arranged on a side surface of the light guide plate on a side where the wavelength conversion layer is arranged.

Abstract: A liquid crystal display panel of the present invention includes, sequentially from the viewer side: a first linearly polarizing plate; a first ?/4-wavelength layer; a first substrate including a color filter, a black matrix, and a second ?/4-wavelength layer; a liquid crystal layer; a second substrate; and a second linearly polarizing plate, the liquid crystal display panel further including a sealing material disposed so as to surround the liquid crystal layer in a plan view, wherein the second ?/4-wavelength layer is disposed closer to the liquid crystal layer than the color filter and the black matrix are and such that an outer edge of the second ?/4-wavelength layer lies inside an arrangement region of the sealing material, and the first ?/4-wavelength layer and the second ?/4-wavelength layer are disposed such that their slow axes are perpendicular to each other.

Abstract: The present invention is directed to an optical member including: a first layer that includes a first region having a refractive index n1 and a second region having a refractive index n3; and a second layer disposed on a first main surface of the first layer so as to be in contact with the first region and the second region, the second layer having a refractive index n2. The first layer includes a plurality of said second regions adjoining the first region along a planar direction of the first layer; the plurality of second regions constitute a geometric pattern; and n1 to n3 satisfy the relationship n1<n3<n2. When an optical member according to the present invention is integrated with a lightguide in use, excellent light extraction function is exhibited and leakage of light due to light scattering is suppressed, while attaining good mechanical strength at the same time.

Abstract: There is provided an optical member that can achieve a liquid crystal display apparatus having high brightness, an excellent hue, and a high color rendering property. An optical member according to the present invention includes, in the stated order: a first barrier layer; a first wavelength conversion layer; a second wavelength conversion layer; and a second barrier layer. The first wavelength conversion layer includes a matrix and a first wavelength conversion material dispersed in the matrix and having a predetermined center emission wavelength. The second wavelength conversion layer includes a matrix and a second wavelength conversion material dispersed in the matrix and having a center emission wavelength different from that of the first wavelength conversion material.

Abstract: Provided is an optically functional film that can contribute to the widening of the color gamut of an image display apparatus, the optically functional film being suppressed in brightness reduction and being excellent in durability. The optically functional film of the present invention includes: a resin layer; and a pressure-sensitive adhesive layer arranged on at least one side of the resin layer, wherein the resin layer and/or the pressure-sensitive adhesive layer contains, as coloring matters, a compound X represented by the general formula (I) or (II) and a compound Y having an absorption peak in a wavelength band in a range of from 400 nm to 700 nm, which are mixed with each other.

Abstract: Provided is an optical member that can achieve a liquid crystal display apparatus that is excellent in mechanical strength, has an excellent hue, and shows little change in hue dependent on a viewing angle. The optical member includes a prism sheet and an optically functional element that are integrated with each other. The prism sheet has: a first main surface, which is flat; and a second main surface, on which a plurality of unit prisms each having a columnar shape convex toward an opposite side to the first main surface are arrayed. Convex portions formed by the plurality of unit prisms on the second main surface of the prism sheet are bonded to one main surface of the optically functional element.

Abstract: Provided is a film for an LED backlight, which can enhance the waveguide efficiency of a light guide plate in a sidelight-type planar backlight. The film for an LED backlight of the present invention includes: a low-refractive index layer; and a first pressure-sensitive adhesive layer arranged on at least one side of the low-refractive index layer, wherein the low-refractive index layer has a refractive index of 1.25 or less. In one embodiment, the low-refractive index layer is configured to be a porous body having voids. In one embodiment, the low-refractive index layer has a void ratio of 35 vol % or more.

Abstract: Provided is a circularly polarizing plate that is excellent in antireflection characteristic, and that can be produced at low cost. The circularly polarizing plate of the present invention includes in the stated order: a polarizer; a retardation layer (20a) configured to function as a ?/4 plate; and a colored layer, wherein an angle formed by an absorption axis of the polarizer and a slow axis of the retardation layer (20a) is from 35° to 55°, wherein the colored layer has an absorption peak in a wavelength band in a range of from 580 nm to 610 nm, and wherein the colored layer contains a compound X represented by the general formula (I) or the general formula (II).

Abstract: Provided are: a film for an LED lighting apparatus, which allows the front surface and/or back surface of a light guide unit to have any appropriate film laminated thereon, or to be subjected to any appropriate surface treatment, while suppressing a reduction in waveguide efficiency of light in a lighting apparatus having an LED light source arranged on one end surface of a light guide plate and being configured to emit light from an end surface opposed to the end surface (entrance end surface) on which the LED light source is arranged; and an LED lighting apparatus including the film for an LED lighting apparatus. The film for an LED lighting apparatus of the present invention includes: a base material; and a low-refractive index layer arranged on at least one side of the base material. In one embodiment, the low-refractive index layer has a refractive index of 1.25 or less.

Abstract: The present invention provides, for example, a silicone porous body having a porous structure with less cracks and a high proportion of void space as well as having a strength. The silicone porous body of the present invention includes silicon compound microporous particles, wherein the silicon compound microporous particles are chemically bonded by catalysis. For example, the abrasion resistance measured with BEMCOT® is in the range from 60% to 100%, and the folding endurance measured by the MIT test is 100 times or more. The silicone porous body can be produced, for example, by forming the precursor of the silicone porous body using sol containing pulverized products of a gelled silicon compound and then chemically bonding the pulverized products contained in the precursor of the silicone porous body. The chemical bond among the pulverized products is preferably a chemical crosslinking bond among the pulverized products, for example.

Abstract: An optical member is disclosed that can achieve a liquid crystal display apparatus having excellent durability and having a high color rendering property. An optical member according to the present invention includes, in the stated order: a first barrier layer; a wavelength conversion layer; and a second barrier layer. The wavelength conversion layer includes a matrix and a wavelength conversion material dispersed in the matrix. An emission spectrum of light to be extracted from the optical member has a peak having an intensity Gp in a wavelength band of from 515 nm to 550 nm, and a peak having an intensity Rp in a wavelength band of from 605 nm to 650 nm, and an average value Ave of intensities in a wavelength band of from 570 nm to 600 nm in the emission spectrum and an average value of Gp and Rp satisfy the following expression (1): Ave?0.1×{(Gp+Rp)/2}??(1).

Abstract: Provided is an optical laminate having the following feature: when the optical laminate is used in an image display apparatus, the optical laminate can express a sufficient brightness, can express a satisfactory hue, and can achieve a cost reduction while suppressing a reflectance. The optical laminate of the present invention includes: a wavelength conversion layer; and an absorption layer arranged on one side of the wavelength conversion layer, wherein the absorption layer has an absorption peak in a wavelength band in a range of from 580 nm to 610 nm, and wherein the absorption layer contains a compound x represented by the general formula (I) or the general formula (II).

Abstract: The present invention provides a flexible light-emitting device which is a flexible device with which the light leakage is less liable to occur even if it is deformed. In order to achieve the above object, the flexible light-emitting device of the present invention includes a light-emitting layer, a low refractive index layer, and a high refractive index layer, wherein the light-emitting layer, the low refractive index layer, and the high refractive index layer are stacked in this order, the low refractive index layer has a refractive index lower than that of the light-emitting layer and has a haze of less than 5%, and the high refractive index layer has a refractive index higher than that of the low refractive index layer.

Abstract: The present invention aims to provide a low refractive index layer-containing pressure-sensitive adhesive/adhesive sheet which is thin and has a low refractive index. In order to achieve the above object, the present invention provides a low refractive index layer-containing pressure-sensitive adhesive/adhesive sheet, the sheet including: a first pressure-sensitive adhesive/adhesive layer; a low refractive index layer; and a second pressure-sensitive adhesive/adhesive layer, the first pressure-sensitive adhesive/adhesive layer, the low refractive index layer, and the second pressure-sensitive adhesive/adhesive layer being laminated in this order, wherein the low refractive index layer has a refractive index of 1.25 or less.

Abstract: The liquid crystal display panel includes: a first polarizing plate; a first ?/4 plate; a first substrate; a second ?/4 plate; a liquid crystal layer; a second substrate; and a second polarizing plate, wherein the first substrate includes a black matrix but no photo spacer, the second substrate includes a photo spacer overlapping with the black matrix, liquid crystal molecules in the liquid crystal layer homogeneously align with no voltage application, the second ?/4 plate covers no side surface of the photo spacer, and the in-plane slow axis of the first ?/4 plate forms an angle of 45° with the transmission axis of the first polarizing plate and is orthogonal to the in-plane slow axis of the second ?/4 plate.

Abstract: A processing temperature TS by a rapid thermal processing furnace is 1250° C. or more and 1350° C. or less, and a cooling rate Rd from the processing temperature is in a range of 20° C./s or more and 150° C./s or less, and thermal processing is performed by adjusting the processing temperature TS and the cooling rate Rd within a range between the upper limit P=0.00207TS·Rd?2.52Rd+13.3 (Formula (A)) and the lower limit P=0.000548TS·Rd?0.605Rd?0.511 (Formula (B)) of an oxygen partial pressure P in a thermal processing atmosphere.

Abstract: A liquid crystal display panel includes a first ?/4 retardation layer, a first substrate, a color filter layer, a liquid crystal layer containing horizontally aligned liquid crystals, and a second ?/4 retardation layer that is formed from a different material from the first ?/4 retardation layer between the first substrate and the color filter layer or between the color filter layer and the liquid crystal layer. The second ?/4 retardation layer has a smaller thickness in a region overlapping the blue color filter than in a region overlapping the green color filter. The first ?/4 retardation layer provides a retardation Rout(?) to light having a wavelength of ? nm. The second ?/4 retardation layer provides a retardation Rin(?). The retardation Rout(?) and the retardation Rin(?) satisfy the following formula (1) in the region overlapping the blue color filter. ?1.0 nm<Rin(450)?Rout(450)<10.