Abstract: An optical device in which, for use in a head-mounted display, visibility of the background is excellent and rainbow unevenness caused by external light incident from the upper front side of the head of a user can be suppressed; and a head-mounted display. The optical device includes: a light guide plate having a surface on which a diffraction element is disposed; and an optical filter that includes an anisotropic light absorbing layer, in which an angle between an absorption axis of the anisotropic light absorbing layer and a normal direction of a main surface of the anisotropic light absorbing layer is 0° to 45°.

Abstract: An organic EL display device capable of suppressing a change in tint in a case where white display is visually recognized from an oblique direction. The organic EL display device includes an organic EL display element and a light absorption anisotropic layer, in which the light absorption anisotropic layer is a light absorption anisotropic layer formed of a composition containing a liquid crystal compound and a dichroic substance, an angle between a transmittance central axis of the light absorption anisotropic layer and a normal line of a layer plane of the light absorption anisotropic layer is 0° or more and 450 or less, and A(?) of the light absorption anisotropic layer represented by Expression (1) A(?)={kz(?)?(kx(?)+ky(?))/2}×d, is 15 to 225 nm at a maximal absorption wavelength of the light absorption anisotropic layer.

Abstract: Provided is a viewing angle control system and an image display device which are capable of controlling the viewing angle of a display screen in a longitudinal direction and improving the visibility in a specific lateral direction. The viewing angle control system includes a polarizer, and a light absorption anisotropic layer, in which the polarizer has an in-plane absorption axis in a film, an angle ? between a transmittance central axis of the light absorption anisotropic layer and a normal line of the film is in a range of 0.1° to 45°, and an angle ? between a direction in which the transmittance central axis of the light absorption anisotropic layer is orthographically projected onto the film surface and the absorption axis of the polarizer is 0° or greater and less than 85°, greater than 95° and less than 265°, or greater than 275° and 360° or less.

Abstract: A circularly polarizing plate capable of suppressing occurrence of light leakage at a corner portion in a display device and suppressing the corner portion from being conspicuous in a reflected image when the circularly polarizing plate is used in a self-luminous display device in a high-temperature and changing humidity environment; and a self-luminous display device. The circularly polarizing plate includes, in order, a retardation layer, and first and second light-absorbing anisotropic layers, where a support is not provided between any of the three layers; the first light-absorbing anisotropic layer has an absorption axis in a plane of the first light-absorbing anisotropic layer; an angle ? between a transmittance central axis of the second light-absorbing anisotropic layer and a normal direction to the second light-absorbing anisotropic layer surface is 0° or more and 45? or less; and a thermal shrinkage force of the circularly polarizing plate is 5 N/m or less.

Abstract: Provided is a head-up display system and a transportation machine including the head-up display system, the head-up display system including a windshield glass having a selective reflection layer and a projector including laser light sources of three colors of blue light, green light, and red light for forming a projection image on the windshield glass, in which the selective reflection layer includes the following selective reflection central wavelengths ?B, ?G, and ?R at a light incidence angle of 60°, 400nm??B<500nm 500nm??G<600nm 600nm??R<700nm all of XB/XG, XB/XR, and XG/XR are in a range of 0.80 to 1.20. In the above, XB=RB×LB, XG=RG×LG, and XR=RR×LR. RB, RG, and RR indicate a natural light reflectivity at ?B, ?G, and ?R, and LB, LG, and LR indicate the brightness of blue, green, and red laser beam emitted from the projector.

Abstract: Provided is a viewing angle control system and an image display device which are capable of controlling the viewing angle of a display screen in a longitudinal direction and improving the visibility in a specific lateral direction. The viewing angle control system includes a polarizer, and a light absorption anisotropic layer, in which the polarizer has an in-plane absorption axis in a film, an angle ? between a transmittance central axis of the light absorption anisotropic layer and a normal line of the film is in a range of 0.1° to 45°, and an angle ? between a direction in which the transmittance central axis of the light absorption anisotropic layer is orthographically projected onto the film surface and the absorption axis of the polarizer is 0° or greater and less than 85°, greater than 95° and less than 265°, or greater than 275° and 360° or less.

Abstract: 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.

Abstract: 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.

Abstract: A cellulose ester film includes at least one polyester; and a cellulose ester having a degree of substitution of 2.0 to 2.6. A weight average molecular weight of the polyester is 1,500 or less, and a ratio of components having a molecular weight of 500 or less in the polyester is less than 8%.

Abstract: To provide a polarizing plate which is adjusted in curling so as to cause no defectives during sticking to a liquid crystal cell while maintaining a high optical compensation capacity and a liquid crystal display comprising the polarizing plate excellent in viewing angle properties, a polarizing plate is provided and has a polarizing film and a protective film, which curls in an amount of from ?30 mm to +15 mm at 25° C. and 60% RH.

Abstract: Disclosed is a cellulose acylate film comprising a cellulose acylate satisfying relations of 2.0?A+B?2.45, (II): and 0.8?A?1.4, and (III): 0.6?B?1.65 where “A” represents a degree of acetyl substitution of hydroxy in a glucose unit of cellulose acylate; and “B” represents a degree of with C3 or longer acyl substitution of hydroxy in a glucose unit of cellulose acylate; and satisfying relations of 50 nm?Re(590)?70 nm, 100 nm?Rth(590)?120 nm, and (VI): 1.4?Rth(590)/Re(590)?2.6.

Abstract: A liquid crystal display device comprising a liquid crystal panel in which liquid crystals having negative dielectric anisotropy are interposed between upper substrate and lower substrate that have been vertically oriented on the surface, the orientation of the liquid crystals being almost vertical with no applied voltage, almost horizontal when a predetermined voltage is applied, and tilted when a smaller voltage than the predetermined voltage is applied; a first polarizer and a second polarizer disposed on both sides of the liquid crystal panel such that the absorption axes of the polarizers are perpendicular to each other; a first retardation film disposed between the liquid crystal panel and the first polarizer; and a second retardation film disposed between the liquid crystal panel and the second polarizer, wherein the polarizer comprises a polarizing film and a pair of protective films having the polarizing film in between, and wherein at least one of the protective films is a cellulose acylate film sat

Abstract: Disclosed is a cellulose acylate film comprising a cellulose acylate satisfying relations of 2.0?A+B?2.45, (II): and 0.8?A?1.4, and (III): 0.6?B?1.65 where “A” represents a degree of acetyl substitution of hydroxy in a glucose unit of cellulose acylate; and “B” represents a degree of with C3 or longer acyl substitution of hydroxy in a glucose unit of cellulose acylate; and satisfying relations of 50 nm?Re(590)?70 nm, 100 nm?Rth(590)?120 nm, and (VI): 1.4?Rth(590)/Re(590)?2.6.

Abstract: A liquid crystal display is provided and includes: a liquid crystal cell; a pair of polarizing plates disposed in cross-Nicol arrangement and sandwiching the liquid crystal cell. One of the pair of the polarizing plates has a protective film A for polarizer, disposed on the liquid crystal cell side, and the other of the pair has a protective film B for polarizer, disposed on a liquid crystal cell side. ReA(?) and RthA(?) of the protective film A, RthB(?) of the protective film B and ?nd(?) of the liquid crystal cell satisfy expressions (I) and (II) at a wavelength of 400 nm to 700 nm: 0.74×(?nd(?)?RthB(?))?RthA(?)?0.97×(?nd(?)?RthB(?))??(I) 0.018×?2/(?nd(?)?RthB(?))+0.032×??ReA(?)?0.036×?2/(?nd(?)?RthB(?))+0.032×???(II).

Abstract: A polarizing plate comprises a light-scattering polarizing element and a light-absorbing polarizing element. The elements are so arranged that the polarizing transmission axis of the light-scattering polarizing element is essentially parallel to the polarizing transmission axis of the light-absorbing polarizing element. The light-scattering polarizing element has a polarizing layer comprising an optically isotropic continuous phase and an optically anisotropic discontinuous phase.

Abstract: A liquid crystal display is provided and includes: a liquid crystal cell; a pair of polarizing plates disposed in cross-Nicol arrangement and sandwiching the liquid crystal cell. One of the pair of the polarizing plates has a protective film A for polarizer, disposed on the liquid crystal cell side, and the other of the pair has a protective film B for polarizer, disposed on a liquid crystal cell side. ReA(?) and RthA(?) of the protective film A, RthB(?) of the protective film B and ?nd(?) of the liquid crystal cell satisfy expressions (I) and (II) at a wavelength of 400 nm to 700 nm: 0.74×(?nd(?)?RthB(?))?RthA(?)?0.97×(?nd(?)?RthB(?))??(I) 0.018×?2/(?nd(?)?RthB(?))+0.032×??ReA(?)?0.036×?2/(?nd(?)?RthB(?))+0.

Abstract: A liquid crystal display device comprising a liquid crystal panel in which liquid crystals having negative dielectric anisotropy are interposed between upper substrate and lower substrate that have been vertically oriented on the surface, the orientation of the liquid crystals being almost vertical with no applied voltage, almost horizontal when a predetermined voltage is applied, and tilted when a smaller voltage than the predetermined voltage is applied; a first polarizer and a second polarizer disposed on both sides of the liquid crystal panel such that the absorption axes of the polarizers are perpendicular to each other; a first retardation film disposed between the liquid crystal panel and the first polarizer; and a second retardation film disposed between the liquid crystal panel and the second polarizer, wherein the polarizer comprises a polarizing film and a pair of protective films having the polarizing film in between, and wherein at least one of the protective films is a cellulose acylate film sat

Abstract: A polarizing plate comprising at least one protective film; and a polarizing film, wherein the protective film disposed on a liquid crystal cell side has Re(?) and Rth(?) satisfying the conditions of 45 nm?Re(590)?65 nm and 150 nm?Rth(590)?240 nm, and the polarizing plate gives, when disposed in an orthogonal position, a hue a* and a hue b* of the polarizing plate disposed in an orthogonal position satisfying the formulae ?1.0?a*?2.0 and ?1.0?b*?2.0 (wherein Re(?) represents a retardation value in plane at a wavelength of ?nm (unit: nm), and Rth(?) represents a retardation value along a thickness of the film (unit: nm)).

Abstract: A polarizing plate comprising: a first protective film; a polarizer; and a second protective film, in this order, wherein at least one of the first protective film and the second protective film has an adhesive layer, and wherein the at least one of the first protective film and the second protective film has a modulus of elasticity E satisfying numerical formula (1), and the adhesive layer undergoes creep deformation of less than 70 ?m when a piece of which having a size of 10 mm in width and 10 mm in length is stuck on an alkali-free glass plate and a load of 200 g is applied thereto in an atmosphere of 50° C. for 1 hour: numerical formula (1): 500 MPa?E?3000 MPa.

Abstract: A polymer film satisfying the following formulae (1) to (3): 20 nm?Rth(548)<100 nm??(1) 1.0<Rth(446)/Rth(548)<4.0??(2) 0.5<Rth(628)/Rth(548)<1.0??(3) wherein Rth(?) represents the value of Rth that is measured at a wavelength of ? nm.