Abstract: The present embodiment provides a composition containing a rare earth complex and a fluorine-based solvent, which can also be used in a fluorescent flaw inspection method. A rare earth complex-containing composition according to the present embodiment is a rare earth complex-containing composition that contains a rare earth complex containing: a rare earth ion; two or more phosphine oxide ligands having different structures; and a ?-diketone ligand, the rare earth complex being dissolved in a fluorine-based solvent. The present embodiment also relates to a fluorescent flaw inspection method using the same.

Abstract: According to one embodiment, a light emitting device includes a base, a light emitting element, and a fluorescent body-containing layer. The light emitting element is installed on the base, has an upper surface and a lower surface, and includes a light emitting unit on the upper surface. The fluorescent body-containing layer is provided on the light emitting element and has a lower surface having an area smaller than an area of the light emitting unit and an upper surface having an area larger than an area of the light emitting unit.

Abstract: According to one embodiment, a lighting apparatus includes a plurality of light emitting units, a plurality of optical elements, a first housing, a control unit and a second housing. The first housing houses the plurality of light emitting units and the plurality of optical elements and having a hole penetrating between a first surface and a second surface opposing the first surface. The second housing is provided on the second surface side of the first housing via a space and housing at least part of the control unit. The lighting apparatus satisfies the following formula. B/A?0.3 where A is an opening area of an opening of the space facing an outside of the lighting apparatus and B is an opening area of an opening of the hole facing an outside of the lighting apparatus.

Abstract: According to one embodiment, a light emitting device includes a base, a light emitting element, and a fluorescent body-containing layer. The light emitting element is installed on the base, has an upper surface and a lower surface, and includes a light emitting unit on the upper surface. The fluorescent body-containing layer is provided on the light emitting element and has a lower surface having an area smaller than an area of the light emitting unit and an upper surface having an area larger than an area of the light emitting unit.

Abstract: A lens includes a first lens section and a second lens section, which are integrally formed. The first lens section is formed in a hemispherical shell shape including a first recess opened toward one side of an optical axis direction in which light from a light source is made incident. The second lens section is formed in a hemispherical shell shape including a second recess opened toward the other side of the optical axis direction.

Abstract: A self-ballasted lamp includes a base body, a light source unit attached to one side of the base body, a lens attached to the light source unit, a cap provided on the other side of the base body and a lighting circuit arranged in the space provided by the base body and the cap. The light source unit includes a light source constituted by semiconductor light emitting elements. The lens has a lens body facing the light source and an attachment leg for attaching the lens body to the light source unit. A claw portion to be secured to the light source unit can be provided on the attachment leg.

Abstract: In an embodiment, a lighting control system includes a plurality of lighting apparatuses and a central control device. In an embodiment, the central control device controls lighting states of the plurality of lighting apparatuses, based on a first illumination which is an illumination of an irradiated surface irradiated by the plurality of lighting apparatuses, and a second illumination which is an illumination at a certain measurement point in a lighting space irradiated by light sources of the plurality of lighting apparatuses and is formed by a reflected light of light emitted by the lighting apparatuses.

Abstract: According to one embodiment, a semiconductor light emitting device includes a substrate, a first semiconductor layer, a light emitting layer, a second semiconductor layer, and a translucent electrode. The substrate includes a first region provided along periphery of a first major surface and a second region provided on center side of the first major surface as viewed from the first region. The first semiconductor layer is provided on the first major surface of the substrate. The light emitting layer is provided on the first semiconductor layer. The second semiconductor layer is provided on the light emitting layer. The translucent electrode is provided on the second semiconductor layer. A reflectance in the second region is higher than a reflectance in the first region.

Abstract: A lens includes a first lens section and a second lens section, which are integrally formed. The first lens section is formed in a hemispherical shell shape including a first recess opened toward one side of an optical axis direction in which light from a light source is made incident. The second lens section is formed in a hemispherical shell shape including a second recess opened toward the other side of the optical axis direction.

Abstract: According to an embodiment, an LED lamp includes a thermal radiation unit on which an LED module with a light source mounted thereon is mounted and which has a function of radiating heat generated from the LED module, and an insulating case which is integrally molded inside the thermal radiation unit in order to electrically insulate a drive circuit of the LED module provided inside and the thermal radiation unit from each other.

Abstract: According to one embodiment, an illumination device includes a light guide plate and a plurality of light sources. The light guide plate includes a light emitting surface. The plurality of light sources whose light emission luminance can be controlled individually, the light sources being configured to supply light from an edge portion of the light guide plate into the light guide plate. A luminance distribution of light injected from the light sources into the light guide plate and emitted from the light emitting surface is obtained by a function such that relative intensity relative to a DC component in a spatial frequency region is less than or equal to a first threshold in a spatial frequency region having a value of one or more. Source-to-source distance of the light sources is optimized by the luminance distribution of the light.

Abstract: A self-ballasted lamp includes a base body, a light source unit attached to one side of the base body, a lens attached to the light source unit, a cap provided on the other side of the base body and a lighting circuit arranged in the space provided by the base body and the cap. The light source unit includes a light source constituted by semiconductor light emitting elements. The lens has a lens body facing the light source and an attachment leg for attaching the lens body to the light source unit. A claw portion to be secured to the light source unit can be provided on the attachment leg.

Abstract: According to one embodiment, a semiconductor light emitting device includes a substrate, a first semiconductor layer, a light emitting layer, a second semiconductor layer, and a translucent electrode. The substrate includes a first region provided along periphery of a first major surface and a second region provided on center side of the first major surface as viewed from the first region. The first semiconductor layer is provided on the first major surface of the substrate. The light emitting layer is provided on the first semiconductor layer. The second semiconductor layer is provided on the light emitting layer. The translucent electrode is provided on the second semiconductor layer. A reflectance in the second region is higher than a reflectance in the first region.

Abstract: According to one embodiment, a planar lighting device includes a plurality of light sources, a light guide layer provided on a light-emission side of the light sources and configured to guide light from the light sources, and a reflective layer provided on an opposite side of the light guide layer to the light sources and through which a part of the light is transmitted. The light guide layer includes light-scattering properties for scattering light and is formed so that optical transmittance T based on the light-scattering properties is 40%?T?93%.

Abstract: A backlight for a liquid crystal display device includes a plurality of point light sources 1 arranged linearly, a light guide plate 3 having a light incident surface 3a, a reflection surface 3b and a light emitting surface 3c for emitting the light reflected by the reflection surface 3b. A light scattering pattern 31 is formed on the reflection surface 3b. A light control pattern 32 is formed on the reflection surface 3b at almost entire portions except for the light scattering pattern 31 is formed for reflecting the light introduced and for outputting from the light emitting surface 3c. A pattern less area is formed on the reflection surface 3b at a boundary portion between the light scattering pattern 31 and the light control pattern 32.

Abstract: An illumination apparatus includes: a light guide plate composed of a plurality of aligned blocks; and a plurality of light sources, each being provided for one of the blocks and emitting light to the one block. A gap of 0.1 microns or more is formed in at least part of a region between the adjacent blocks. An inside of the gap serves as an air layer.

Abstract: The backlight device includes a plurality of packages, and a light guide plate. The package includes a housing for package, and a plurality of light sources. The housing for package includes a tubular part having a wall surrounding the circumference, a bottom wall provided at one end of the tubular part, and a passing part provided at the other end of the tubular part for passing the light from inside to outside of the tubular part. The plurality of light sources are contained in the housing for package and disposed in the bottom wall, and emit light. The plurality of packages are arrayed in one direction. At least part of the layout of light sources relative to the incident plane is different from mutually adjacent packages.

Abstract: A backlight for a liquid crystal display device includes a plurality of point light sources 1 arranged linearly, a light guide plate 3 having a light incident surface 3a, a reflection surface 3b and a light emitting surface 3c for emitting the light reflected by the reflection surface 3b. A light scattering pattern 31 is formed on the reflection surface 3b. A light control pattern 32 is formed on the reflection surface 3b at almost entire portions except for the light scattering pattern 31 is formed for reflecting the light introduced and for outputting from the light emitting surface 3c. A pattern less area is formed on the reflection surface 3b at a boundary portion between the light scattering pattern 31 and the light control pattern 32.

Abstract: The backlight device includes a plurality of packages, and a light guide plate. The package includes a housing for package, and a plurality of light sources. The housing for package includes a tubular part having a wall surrounding the circumference, a bottom wall provided at one end of the tubular part, and a passing part provided at the other end of the tubular part for passing the light from inside to outside of the tubular part. The plurality of light sources are contained in the housing for package and disposed in the bottom wall, and emit light. The plurality of packages are arrayed in one direction. At least part of the layout of light sources relative to the incident plane is different from mutually adjacent packages.

Abstract: An illumination apparatus includes: a light guide plate composed of a plurality of aligned blocks; and a plurality of light sources, each being provided for one of the blocks and emitting light to the one block. A gap of 0.1 microns or more is formed in at least part of a region between the adjacent blocks. An inside of the gap serves as an air layer.