Abstract: A method of producing a positive electrode active material, the method includes: contacting first particles that contain a lithium transition metal composite oxide with a solution containing sodium ions to obtain second particles containing the lithium transition metal composite oxide and sodium element, wherein the lithium transition metal composite oxide has a layered structure and a composition ratio of a number of moles of nickel to a total number of moles of metals other than lithium in a range of from 0.7 to less than 1; mixing the second particles and a boron compound to obtain a mixture; and heat-treating the mixture at a temperature in a range of from 100° C. to 450° C.

Abstract: A base includes: a mount surface; a lateral wall located around the mount surface, the lateral wall including: a pair of first protrusions having first upper surfaces and located opposite to each other in a first direction that is parallel to a side of the mount surface, wherein each first protrusion has a same height from the mount surface, a pair of second protrusions having second upper surfaces and located opposite to each other in a second direction which is perpendicular to the first direction, wherein each second protrusion has a height from the mount surface less than the height of the first protrusion; and at least one conduction region disposed on at least one of the first upper surfaces and/or at least one of the second upper surfaces.

Abstract: An ultraviolet light fluid treatment device for irradiating a fluid flowing in a flow path tube with ultraviolet light includes a substrate; a light source disposed on the substrate and configured to emit the ultraviolet light; a light transmissive member disposed between the light source and the flow path tube and configured to transmit the ultraviolet light from the light source; and a support member fixed to the substrate and configured to hold an adsorption member that includes an adsorbent material adsorbing moisture. The support member has a reflective surface. The reflective surface is positioned between the light source and the adsorption member, and is configured to reflect the ultraviolet light from the light source.

Abstract: A light-emitting device includes: a light source including: a plurality of light-emitting parts, each having a first main surface serving as a light-exiting surface, and a second main surface on a side opposite the first main surface, and each comprising a first electrode and a second electrode at the second main surface, and a covering member integrally holding the plurality of light-emitting parts such that the first electrode and the second electrode are exposed from the covering member; and a substrate having an upper surface and comprising, at the upper surface: a plurality of first wiring portions, each of which is opposed to a corresponding one of the first electrodes of the light-emitting parts, and a plurality of second wiring portions, each of which is opposed to a corresponding one of the second electrodes of the light-emitting parts.

Abstract: A integrated light-emitting device including: a base including a conductive wiring; a plurality of light-emitting devices mounted on the base and configured to emit a first light, each of the light-emitting devices comprising a light-emitting element and a encapsulant covering the light-emitting element; a light reflective film provided on an upper surface of the light-emitting element; and a plurality of light reflective members disposed between adjacent ones of the light-emitting devices. A ratio (H/W) of a height (H) of the encapsulant to a width (W) of a bottom surface of the encapsulant is less than 0.5. Each of the light-emitting devices has a batwing light distribution characteristics.

Abstract: A method of manufacturing a light-emitting device 1 includes a step of providing first phosphor sheets 11, a step of providing second phosphor sheets 12, a step of providing a light-emitting element 13, a selection step of selecting a combination of one of the first phosphor sheets 11 and one of the second phosphor sheets 12 on the basis of a wavelength conversion characteristic of each of the first phosphor sheets 11 and a wavelength conversion characteristic of each of the second phosphor sheets 12, a step of obtaining a plurality of first phosphor pieces 11c and a plurality of second phosphor pieces 12c from the selected first phosphor sheet 11 and the selected second phosphor sheet 12, and a step of disposing one of the first phosphor pieces 11c and one of the second phosphor pieces 12c on or above the light-emitting element 13.

Abstract: An electrode for nonaqueous electrolyte secondary batteries, provided with a collector and a positive electrode active material layer arranged on the collector and contains a positive electrode active material. The positive electrode active material contains compound particles which have a layered structure composed of two or more transition metals, and which have an average particle diameter DSEM of from 1 ?m to 7 ?m (inclusive) based on the observation with an electron microscope, a ratio of the 50% particle diameter D50 in a volume-based cumulative particle size distribution to the average particle diameter DSEM, namely D50/DSEM of from 1 to 4 (inclusive), and a ratio of the 90% particle diameter D90 in the volume-based cumulative particle size distribution to the 10% particle diameter D10 in the volume-based cumulative particle size distribution, namely D90/D10 of 4 or less. The positive electrode active material layer has a void fraction of 10-45%.

Abstract: Provided are a method for producing a ceramic sintered body having improved light emission intensity, a ceramic sintered body, and a light emitting device. The method for producing a ceramic sintered body comprises preparing a molded body that contains a nitride fluorescent material having a composition containing: at least one alkaline earth metal element M1 selected from the group consisting of Ba, Sr, Ca, and Mg; at least one metal element M2 selected from the group consisting of Eu, Ce, Tb, and Mn; Si; and N, wherein a total molar ratio of the alkaline earth metal element M1 and the metal element M2 in 1 mol of the composition is 2, a molar ratio of the metal element M2 is a product of 2 and a parameter y and wherein y is in a range of 0.001 or more and less than 0.

Abstract: The present disclosure relates to a method of treating a plant, the method including: irradiating the plant with light in a wavelength range of 300 nm to 325 nm at a fluence of 4,000 ?mol/m2 to 50,000 ?mol/m2, while a fluence of light in a wavelength range of 290 nm or less irradiated to the plant is less than 20% of that of the light in the wavelength range of 300 nm to 325 nm, or the plant is not irradiated with light at any wavelength of 290 nm or less; and then infecting the plant with a microorganism.

Abstract: An image display device includes: an imaging element; a light source configured to irradiate light toward the imaging element; an optical system located in an optical path between the imaging element and the light source; a light-shielding member configured to shield a portion of light of at least the light source; and a light-transmitting member configured to transmit light emitted from the imaging element.

Abstract: A method for treating spermatozoa of an animal includes: irradiating the spermatozoa with light having wavelengths in a range of 390-420 nm at a fluence effective to increase motility of the spermatozoa by 75% or more.

Abstract: A method for manufacturing a light emitting device includes: preparing a light-shielding frame defining a through-hole, and having at least one convex portion; supplying a light reflecting resin so that the convex portion is at least partially covered; preparing a light-transmissive member having a first surface with an outer periphery smaller than an inner periphery of the first main surface, a first side surface contiguous with the first surface, a second side surface located outside of the first side surface, and a third surface contiguous with the first and second side surfaces; bringing the third surface into contact with the convex portion, or with the light reflecting resin in contact with the convex portion, so that the light reflecting resin is disposed between the first side surface and an inside surface of the light-shielding frame; curing the light reflecting resin; and joining light emitting elements and the light-transmissive member.

Abstract: According to one embodiment, the light guide plate has a first major surface, a second major surface, a side surface, and a recess. The recess is provided in the second major surface. The fluorescent layer is provided in the recess. The light-emitting element is bonded to the fluorescent layer and includes an electrode on a surface of the light-emitting element on a side opposite to a surface of the light-emitting element bonded to the fluorescent layer. The module side surface includes at least a portion of the side surface of the light guide plate. The first interconnect is provided along the second major surface and connected to the electrode of the light-emitting element. The second interconnect is provided on the module side surface and connected to the first interconnect.

Abstract: An image display method includes generating luminance data, applying a special filter to the luminance data, generating luminance setting data, generating gradation setting data, and controlling a backlight based on the luminance setting data and a liquid crystal panel based on the gradation setting data. The luminance data indicates a luminance value for each of light-emitting regions of the backlight based on a maximum gradation value among gradation values of image pixels of an input image that correspond to the light-emitting region. The special filter is applied such that, with respect to each light-emitting region, a difference of the luminance value thereof from the luminance values of neighboring light-emitting regions decreases, and the luminance setting data is generated therefrom. The gradation setting data sets a gradation value of each pixel of the liquid crystal panel, and is generated based on the input image and the luminance setting data.

Abstract: A light-emitting device includes a substrate comprising a base member, a first wiring, a second wiring, and a via hole; at least one light-emitting element electrically connected to and disposed on the first wiring; and a covering member having light reflectivity and covering a lateral surface of the light-emitting element and a front surface of the substrate. The base member defines a plurality of depressed portions separated from the via hole in a front view and opening on a back surface and a bottom surface of the base member. The substrate includes a third wiring covering at least one of inner walls of the plurality of depressed portions and electrically connected to the second wiring. A depth of each of the plurality of depressed portions defined from the back surface toward the front surface is larger on a bottom surface side than on an upper surface side of the base member.

Abstract: A light-emitting device includes a support including a wall portion; a light-emitting element placed on the support and surrounded by the wall portion in a plan view; a first light-transmissive member having a first outer surface and a second outer surface, which is located above the first outer surface and is located inside the first outer surface in the plan view, and covering the light-emitting element and the wall portion; and a light-shielding member covering the first light-transmissive member. The first outer surface and the second outer surface are exposed from the light-shielding member, and a surface roughness of the first outer surface is rougher than a surface roughness of the second outer surface.

Abstract: A rare earth aluminate sintered compact including rare earth aluminate phosphor crystalline phases and voids, wherein an absolute maximum length of 90% or more by number of rare earth aluminate phosphor crystalline phases is in a range from 0.4 ?m to 1.3 ?m, and an absolute maximum length of 90% or more by number of voids is in a range from 0.1 ?m to 1.2 ?m.

Abstract: A light-emitting device includes: a first light-emitting element portion including: an n-side nitride semiconductor layer, a first light-emitting layer disposed on the n-side nitride semiconductor layer, and a first p-side nitride semiconductor layer disposed on the first light-emitting layer; a second light-emitting element portion including: a second light-emitting layer disposed on the n-side nitride semiconductor layer, and a second p-side nitride semiconductor layer disposed on the second light-emitting layer; an n-side electrode connected to the n-side nitride semiconductor layer; a first p-side electrode disposed on the first p-side nitride semiconductor layer via an upper n-type semiconductor layer disposed on the first p-side semiconductor layer; and a second p-side electrode connected to the second p-side nitride semiconductor layer. A composition of the second light-emitting layer is different from a composition of the first light-emitting layer.

Abstract: A light emitting module includes: a first light emitting device including: a first package, a plurality of first semiconductor laser elements mounted in the first package, and a first lens member having lens portions, a number of the lens portion is the same as a number of the first semiconductor laser elements; and a second light emitting device including: a second package, a plurality of second semiconductor laser elements mounted in the second package, wherein a quantity of the second semiconductor laser elements is fewer than a quantity of the first semiconductor laser elements, and a second lens member which is structured the same as the first lens member; and one or more mounting substrates in which the first light emitting device and the second light emitting device are mounted.

Abstract: A light source unit includes light-emitting elements, a light-shielding body, and a rod lens including a first end surface, a second end surface, and a side surface. The light-shielding body is separated from the side surface, covers the side surface, includes an opening exposing at least a portion of the second end surface, and includes a tip protruding further than the second end surface in a first direction from the first end surface toward the second end surface. A first plane crosses the first direction and is at the same first-direction position as the tip. A second plane crosses the first direction and is at the same position as the second end surface or between the tip and second end surface in the first direction. A first surface area of the opening at the first plane is greater than a second surface area of the opening at the second plane.