A display device includes a substrate; a partition wall on the substrate; a light emitting element extends in a thickness direction of the substrate and is in an emission area of the substrate partitioned by the partition wall; a wavelength conversion layer on the light emitting element and includes a base resin and wavelength conversion particles dispersed in the base resin and being for converting a wavelength of light emitted from the light emitting element; a light blocking member on the partition wall; a reflective member between the light blocking member and the partition wall; and an optical pattern on the wavelength conversion layer in the emission area and having a shape protruding in an upward direction away from the substrate.

A light generator comprises a light conversion device and a light source arranged to apply a light beam to the light conversion element. The light conversion device includes an optoceramic or other solid phosphor element comprising one or more phosphors embedded in a ceramic, glass, or other host, a metal heat sink, and a solder bond attaching the optoceramic phosphor element to the metal heat sink. The optoceramic phosphor element does not undergo cracking in response to the light source applying a light beam of beam energy effective to heat the optoceramic phosphor element to the phosphor quenching point.

A luminophore may have the general formula A.sub.xM.sub.yX.sub.z:RE. A may be selected from the group of the trivalent cations. M may be selected from the group of the trivalent cations and includes at least two elements from the following group: Ga, Sc, Al, In, Sb, Bi, As, and Lu. X may be selected from the group of the divalent anions. RE may be a dopant and may be selected from the group formed by the following elements and the combinations of the following elements: Ni, Mn, Cr, Co, Fe, and Sn, where

0.8≤x≤1.2,

0.8≤y≤1.2 and

2.7≤z≤3.3.

A process is also disclosed for producing a luminophore, an optoelectronic component, and an NIR spectrometer.

A phosphor plate includes a plate-like composite including an inorganic base material, which is a sintered material of two or more types of metal oxide including SiO.sub.2, and a phosphor contained in the inorganic base material, in which the phosphor includes an α-type sialon phosphor, and in a case in which intensity of transmitted light at a wavelength of 455 nm and intensity of reflected light at a wavelength of 455 nm of the phosphor plate are denoted by T1 and R1, respectively, T1 and R1 satisfy 1.5×10.sup.−2≤T1/R1≤5.0×10.sup.−2.

Provided is a light-emitting device having a high luminous flux.

The light-emitting device comprises a light-emitting element 11 that has a dominant wavelength in a range of 380 nm or more and 485 nm or less, and a fluorescent material layer 31 that includes a fluorescent material emitting light by being excited by light emitted from the light-emitting element 11, and a neodymium compound, wherein the light-emitting device emits light having a dominant wavelength in a range of 584 nm or more and 780 nm or less.

The present invention relates to a manufacturing method for a wavelength converting component which is prepared from a dispersion containing a crosslinkable ceramizable polymer material having a silazane repeating unit and at least one wavelength converting material. There are further provided wavelength converting components which can be used for converting blue, violet and/or UV light into light with a longer wavelength. There is also provided a light source and a lighting unit comprising said wavelength converting components.

A light-emitting device includes a light-emitting element which emits ultraviolet light, and a fluorescent layer provided on the light-emitting element. The fluorescent layer includes fluorescent particles. The fluorescent particles are excited by the ultraviolet light emitted by the light-emitting element and the excited fluorescent particles emit ultraviolet light of a wavelength longer than the ultraviolet light emitted by the light-emitting element.

A light emitting device (1) is a light emitting device for use in a photodynamic therapy. The light emitting device includes: a solid-state light-emitting element (2) that emits primary light in which an energy density is 0.5 W/mm.sup.2 or more; and a wavelength converter (3) including a first phosphor (4) that emits first wavelength-converted light (7). The first wavelength-converted light has a light component across at least a whole of a wavelength range of 700 nm or more and less than 800 nm. Energy of fluorescence emitted from the wavelength converter is 100 mW or more. A medical device includes the light emitting device.

A phosphor plate includes a plate-like composite including a base material and a phosphor contained in the base material, in which the base material contains spinel, the phosphor includes a phosphor containing a Si element, and in an X-ray diffraction pattern of the phosphor plate using a Cu-Kα ray, in a case in which peak intensity corresponding to the spinel having a diffraction angle 2θ in a range of 36.0° or more and 37.4° or less is set to 1, total intensity of peaks having a diffraction angle 2θ in a range of 32.5° or more and 34.5° or less satisfies 0.5 or less.

A phosphor particle for a micro LED or a mini LED, consisting of CASN and/or SCASN. A cured sheet produced by the following sheet producing procedure using this phosphor particle satisfies the following optical characteristics.

<Sheet Producing Procedure>

(1) 40 parts by mass of the phosphor particle and 60 parts by mass of a silicone resin OE-6630 manufactured by Dow Corning Toray Co., Ltd. are subjected to a stirring treatment and a defoaming treatment using a rotation and revolution mixer to obtain a uniform mixture.

(2) The mixture obtained in the section (1) is added dropwise to a first transparent fluororesin film, and a second transparent fluororesin film is further laminated on the dropped material to obtain a sheet-like material. This sheet-like material is molded into an uncured sheet using a roller having a gap in which 50 μm is added to a total thickness of the first fluororesin film and the second fluororesin film.

(3) The uncured sheet obtained in the section (2) is heated under conditions of 150° C. and 60 minutes. Then, the first fluororesin film and the second fluororesin film are peeled off to obtain a cured sheet having a film thickness of 50±5 μm.

<Optical Characteristics>

When an intensity at a peak wavelength of blue light emitted from a blue LED having a peak wavelength in a range of 450 nm to 460 nm is defined as Ii [W/nm], and in a case where the blue light is emitted to one surface side of the cured sheet, when an intensity of light emitted from another surface side of the cured sheet at a peak wavelength in a range of 450 nm to 460 nm is defined as It [W/nm] and an intensity thereof at a peak wavelength in a range of 600 nm to 650 nm is defined as Ip [W/nm], It/Ii is equal to or less than 0.2 and Ip/Ii is equal to or more than 0.05.