Abstract: Display performance can be improved by reducing light leak in an oblique direction at the time of black display while increasing front brightness.

Abstract: An optical sheet member includes a polarizing plate including a polarizer (A); an optical conversion member (D); and a brightness enhancement film including a reflection polarizer (B), wherein the brightness enhancement film has a reflection center wavelength range of 300 nm to 430, and the optical conversion member (D) converts a part or all of UV light which is transmitted through polarizer (B) and is incident on the optical conversion member (D), and has an emission center wavelength range of 300 nm to 430 nm and which has an emission center wavelength range of 430 nm to 480 nm, green light which has an emission center wavelength range of 500 nm to 600 nm, and red light which has an emission center wavelength range of 600 nm to 700 nm.

Abstract: Provided is an image display device including an image display unit which includes a display area in which a plurality of pixels is arranged, and a non-display area provided at a periphery of the display area, a light guide unit which has one surface disposed so as to face at least an edge of the display area of the image display unit on a viewing side and another surface that is disposed at an opposite side of the light guide from the one surface and is provided at a position shifted further toward the non-display area than the one surface, and a diffraction element which is disposed between the image display unit and the light guide unit and diffracts light from the display area toward the side of the non-display area adjacent to the edge.

Abstract: A wearable display device 1 includes a display panel 11, an eyepiece 31, and an optical element 21 that is disposed between the display panel 11 and the eyepiece 31, in which the optical element 21 includes an optically-anisotropic layer 23 that is formed of a cured layer of a composition including a liquid crystal compound 24, and the optically-anisotropic layer 23 has a liquid crystal alignment pattern AP1 in which a direction of an optical axis derived from the liquid crystal compound 24 changes while continuously rotating along at least one in-plane direction of the optically-anisotropic layer 23.

Abstract: Provided are a thin stereoscopic image display device that can also deal with a requirement for flexibility and a wearable display device including this stereoscopic image display device. The stereoscopic image display device includes a display panel, an optical element, and a circularly polarizing plate, in which the optical element includes an optically-anisotropic layer that is formed of a liquid crystal compound, the optically-anisotropic layer has a liquid crystal alignment pattern in which a direction of an optical axis derived from the liquid crystal compound changes while continuously rotating along at least one in-plane direction of the optically-anisotropic layer, and circularly polarized light emitted from the display panel is caused to advance in a direction different from a direction in which the circularly polarized light component is incident.

Abstract: Provided are an optical element and a wearable display device, the optical element being suitably applicable to a wearable display device in which a pixel grid of a display panel is inconspicuous to a user and the generation of moire is suppressed. The optical element includes: a support; and a plurality of dots that are arranged on the support and exhibit optical anisotropy, the dots are formed of a composition including a liquid crystal compound, and the optical element includes the dots having a slow axis in a direction different from a direction in which the plurality of dots are arranged.

Abstract: The optical film is an optical film including a cholesteric liquid crystal layer, in which first regions having a first film thickness and second regions having a second film thickness which is smaller than the first film thickness are alternately arranged with a period P of 0.5 ?m to 2.0 ?m in at least one direction in a plane, a difference in film thickness between the first film thickness and the second film thickness is in a range of 0.2 ?m to 1.0 ?m, and a helical pitch of a cholesteric phase in the first region is different from a helical pitch of a cholesteric phase in the second region.

Abstract: An optical laminate includes a wavelength selective reflective element which is provided with a reflection layer selectively reflecting light in a specific reflection wavelength region, and an absolute phase adjustment layer which is provided on at least one surface side of the wavelength selective reflective element and has optical isotropy, and the absolute phase adjustment layer has an in-plane distribution of at least one of a refractive index or a film thickness, and thus has an in-plane distribution of an optical path length in a film thickness direction.

Abstract: The present invention includes an optical element of which an oblique tint change can be improved in a case of the optical element is incorporated to a liquid crystal display device, a method of manufacturing an optical element, and a liquid crystal display device. The optical element includes: a reflection polarizer which is formed of a discotic liquid crystal compound and in which a cholesteric liquid crystalline phase is immobilized, in which, in the reflection polarizer, a front retardation value Re satisfies 0 nm?Re<10 nm in a range of ±50 nm outside a reflection center wavelength, and an absolute value |Ret (50°)| of a retardation value Ret in a polar angle 50° direction satisfies |Ret (50°)|?50 nm.

Abstract: A display device includes an image display panel, and a viewing angle switching element, in which the viewing angle switching element includes first and second linear polarizers arranged to face each other, and a viewing angle control cell and an optical compensation sheet arranged in a laminated manner between the first and second linear polarizers, the viewing angle control cell includes a single domain vertical alignment liquid crystal cell, an angle formed between an in-plane fast axis of the optical compensation sheet and the absorption axis or the reflection axis of the first linear polarizer is 30° to 60°, and a pretilt azimuth of the vertically aligned liquid crystal of the viewing angle control cell is at an angle of 30° to 60° from the absorption axis or the reflection axis of the first linear polarizer.

Abstract: Provided is an optical element including a wavelength selective reflective polarizer and a ?/2 plate in which the ?/2 plate includes an optically anisotropic layer which has an optical axis in a direction parallel to a surface and is formed of a cured layer of a liquid crystal composition and has a liquid crystal alignment pattern in which an orientation of the optical axis changes while continuously rotating in at least one direction in a plane of the optically anisotropic layer, and light in the specific wavelength range which is circularly polarized light oriented in a direction opposite to that of the specific circularly polarized light among light incident on a surface of the optical element on the ?/2 plate side is reflected in a direction different from a regular reflection direction of the incident light.

Abstract: Provided is a depolarizing film including a depolarizing layer composed of a first region and a second region having differing optical characteristics, wherein in the depolarizing layer, the ratio between the area of the first region and the area of the second region is 0.45:0.55 to 0.55:0.45, the first region is an optically anisotropic region causing 90° optical rotation of light that is incident on one surface of the depolarizing layer before the light is emitted from the other surface, and the second region is an optically isotropic region having optical isotropy.

Abstract: A brightness homogenizing member comprising: an incidence surface and an emission surface, the brightness homogenizing member has a lamination structure in which the brightness homogenizing member has a layer of high refractive index and a layer of low refractive index are alternately laminated in a direction perpendicular to the emission surface, each of a plurality of the layers of high refractive index includes, on a light emission surface side, a light bending portion that bends at least a portion of light proceeding in a direction intersecting to the emission surface and cause the light to proceed in a direction in which an in-plane component parallel to the emission surface increases, in a case where the lamination structure is planarly viewed from a lamination direction in the lamination structure, the light bending portions are provided in different positions between the plurality of the layers of high refractive index.

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 is an optical film in which a cholesteric liquid crystalline phase is fixed and a helical axis of the cholesteric liquid crystalline phase is aligned in an in-plane uniaxial direction, and an Nz is 0.2 to 0.75.

Abstract: An anti-glare mirror with an image display function includes, in this order: an image display device; a circular polarization reflection layer A; a liquid crystal cell; and a linear polarizing plate, in which a phase difference layer such as a ¼ wavelength plate is provided between the circular polarization reflection layer A and the linear polarizing plate, and the circular polarization reflection layer A has a cholesteric liquid crystal layer obtained by curing a coating layer of a liquid crystal composition containing a polymerizable liquid crystal compound.

Abstract: Provided is a backlight unit capable of causing light that has exited from a light guide plate to be incident to a liquid crystal panel with high efficiency. The object is achieved by providing the backlight unit including a light source; a light guide plate that causes light to be incident to through an edge face and to exit through one of principal surfaces; and an optical film disposed on a surface of the light guide plate, the surface being on the opposite side of the light exiting surface, in which the optical film has a plurality of reflective polarizing elements each having a curved surface, and/or a plurality of reflective polarizing elements each having an inclined surface that is inclined with respect to the direction of light propagation of the light guide plate.

Abstract: A brightness homogenizing member comprising: an incidence surface and an emission surface, the brightness homogenizing member has a lamination structure in which the brightness homogenizing member has a layer of high refractive index and a layer of low refractive index are alternately laminated in a direction perpendicular to the emission surface, each of a plurality of the layers of high refractive index includes, on a light emission surface side, a light bending portion that bends at least a portion of light proceeding in a direction intersecting to the emission surface and cause the light to proceed in a direction in which an in-plane component parallel to the emission surface increases, in a case where the lamination structure is planarly viewed from a lamination direction in the lamination structure, the light bending portions are provided in different positions between the plurality of the layers of high refractive index.

Abstract: Provided is a depolarizing film including a depolarizing layer composed of a first region and a second region having differing optical characteristics, wherein in the depolarizing layer, the ratio between the area of the first region and the area of the second region is 0.45:0.55 to 0.55:0.45, the first region is an optically anisotropic region causing 90° optical rotation of light that is incident on one surface of the depolarizing layer before the light is emitted from the other surface, and the second region is an optically isotropic region having optical isotropy.

Abstract: An optical apparatus includes a beam splitter that transmits a part of an incidence ray and reflects another part of the incidence ray, a mirror member that includes a mirror surface arranged at a position at which light transmitted through the beam splitter is incident, and a retroreflective member that is arranged at a position at which light specularly reflected on the mirror surface, to be incident on the beam splitter and specularly reflected by the beam splitter is incident.