Abstract: The present invention relates to an LED filament lamp (10) comprising a two-dimensional flexible printed circuit board (100), PCB, having a first and a second opposing connection end portions (110, 120). The two-dimensional flexible PCB (100) comprises a plurality of filaments lines (130a-d) extending from the first connection end portion (110) to the second connection end portion (120), wherein each filament line (130a) comprises an array of LEDs (130a1-130aN). The two-dimensional flexible PCB (100) is arranged in a cylinder shape by connecting the first and the second opposing connection end portions (110, 120) such that each (130a) of the plurality of filament lines (130a-d) is connected to another (130b) one of the plurality of filament lines (130a-d) thereby a spiral LED filament (150) is formed by the plurality of filament lines (130a-d).

Abstract: An object is to provide a highly reliable light emitting device which is thin and is not damaged by external local pressure. Further, another object is to manufacture a light emitting device with a high yield by preventing defects of a shape and characteristics due to external stress in a manufacture process. A light emitting element is sealed between a first structure body in which a fibrous body is impregnated with an organic resin and a second structure body in which a fibrous body is impregnated with an organic resin, whereby a highly reliable light emitting device which is thin and has intensity can be provided. Further, a light emitting device can be manufactured with a high yield by preventing defects of a shape and characteristics in a manufacture process.

Abstract: A multiview backlight, multiview display, and method of multiview backlight operation include reflective multibeam elements configured to provide emitted light having directional light beams with directions corresponding to view directions of a multiview image. The multiview backlight includes a light guide configured to guide light and an array of the reflective multibeam elements, each reflective multibeam element including a plurality of reflective sub-elements and being configured to reflectively scatter out a portion of the guided light as the emitted light. The multiview display includes the multiview backlight and an array of light valves to modulate the directional light beams to provide the multiview image.

Abstract: A light emitting device includes a substrate, a conductive layer, first and second reflective layers, a light emitting element, and an encapsulation layer. The conductive layer is disposed on the substrate. The first reflective layer covers the conductive layer and has an opening exposing a portion of the conductive layer. The light emitting element is disposed in the opening and electrically connects to the conductive layer. The second reflective layer is disposed on the first reflective layer and surrounds the light emitting element. The second reflective layer has an outer diameter. A top surface of the second reflective layer is lower than a top surface of the light emitting element. The encapsulation layer covers the light emitting element. There is a height between a highest point of the encapsulation layer and an upper surface of the first reflective layer. The encapsulating layer is directly contact with the outer diameter.

Abstract: A cadmium-free, core shell quantum dot, a quantum dot polymer composite, and electronic devices including the quantum dot polymer composite. The core shell quantum dot has an extinction coefficient per gram of greater than or equal to 0.3, an ultraviolet-visible absorption spectrum curve that has a positive differential coefficient value at 450 nm, wherein the core shell quantum dot includes a semiconductor nanocrystal core including indium and phosphorus, and optionally zinc, and a semiconductor nanocrystal shell disposed on the semiconductor nanocrystal core, the shell including zinc, selenium, and sulfur, wherein the core shell quantum dot has a quantum efficiency of greater than or equal to about 80%, and is configured to emit green light upon excitation.

Abstract: An optical assembly and a luminaire with extreme cutoff beam control optics. The optical assembly includes a base, a plurality of lenses, a plurality of light emitting diodes (LED) positioned to emit light into the lenses, and a reflector having a reflective surface disposed adjacent at least one of the plurality of LEDs. The optical axis of one or more of the LEDs may be offset from a central axis of the respective lens in which it emits light. The reflective surface of the reflector may extend from the base over the one or more of the LEDs and beyond the optical axis of the one or more LEDs to direct light in a desired direction or toward a selected area (e.g., a street) and cut off light directed in an undesirable direction or area (e.g., a house).

Abstract: An LED lighting sheet (20) for animal/plant growth includes an array of LED chips (21). At any location 50 mm away from the LED chips (21) in a lower region below the LED lighting sheet (20) for animal/plant growth, a photosynthetic photon flux density converted by input power and normalized by an average value over the lower region is greater than or equal to 0.2. A variation in photosynthetic photon flux densities respectively measured at locations 50 mm away from the LED chips (21) in the lower region below the LED lighting sheet (20) for animal/plant growth is less than or equal to 0.5 in standard deviation when normalized by the average value.

Abstract: Backlight modules, display panels and display apparatuses are provided. A backlight module includes: a flexible light board, provided with a plurality of light-emitting elements arranged at intervals, and provided with a first wire at an edge thereof; a back cover including a base plate, the flexible light board being provided on the base plate, and the base plate being provided with a second wire located on a same side as the first wire; and a controller configured to control a direction of an electric current flowing through the first wire and a direction of an electric current flowing through the second wire, to generate an attractive force or a repulsive force between the first wire and the second wire.

Abstract: A first LED with a first LED sidewall is disclosed. A second LED with a second LED sidewall facing the first LED sidewall is also disclosed. A first dynamic optical isolation material between the first LED sidewall and the second LED sidewall and configured to change an optical state based on a state trigger such that a light behavior at the first LED sidewall for a light emitted by one of the first LED and the second LED is determined by the optical state, is also disclosed.

Abstract: A light source module for a microscope, including a light source configured to emit illumination light along an illumination light path, at least one light blocking shutter configured to be moved into and out of the illumination light path, and at least one light sensor configured to detect an intensity of the illumination light propagating along the illumination light path. The at least one light sensor is integrated with the at least one light blocking shutter to be moved therewith into and out of the illumination light path.

Abstract: A display device includes at least one second splicing screen and at least two first splicing screens. The first splicing screen includes a first substrate, a first blue light-emitting unit disposed on the first substrate, and a first yellow fluorescent layer coated on the first blue light-emitting unit. The second splicing screen includes a second substrate and a plurality of second light-emitting units disposed on the second substrate. At least a part of the plurality of second light-emitting units is second blue light-emitting units. Color-gamut adjusting units are disposed on at least a part of the second blue light-emitting units. A light-emitting spectrum of the second blue light-emitting units through the color-gamut adjusting units is consistent to a light-emitting spectrum of the first splicing screens.

Abstract: An optical projection device for projecting a linear image is disclosed. Light emitted by an array of light emitting diodes arranged along an array axis is focused in at least a direction perpendicular to the array axis and diffused in a direction parallel to the array axis, thereby generating a linear image in which light from adjacent light emitting diodes is spatially overlapped. In some embodiments, the focusing and diffusion of the light is performed by a Fresnel lens and a lenticular lens, respectively. The optical projection device may be employed to virtually mark a surface, such as a floor in an industrial setting. High power light emitting diodes may be employed to generate a linear image having an illuminance of at least 4000 lux that is focused to a distance between 7.5 and 20 feet.

Abstract: A display apparatus and light source device thereof are provided. The light source device includes an optical dome having a specifically defined shape to be able to maintain an optical profile of a light source. According to the disclosure, a display apparatus includes a printed circuit board (PCB), a light emitting diode (LED) chip mounted on the PCB and configured to emit light, an optical dome formed to enclose the LED chip by being dispensed on the LED chip, and a liquid crystal panel configured to block or pass light output from the LED chip, wherein the optical dome may be formed to satisfy 1.70<r1/r0<1.83 where r0 is a straight distance for light vertically emitted from the LED chip to reach a surface of the optical dome and r1 is a straight distance for maximum output light emitted from the LED chip to reach the surface of the optical dome.

Abstract: A laser accessory device comprises a housing having a front side having a port, a rear side opposite the front side, a left side, a right side opposite the left side, a top side, and a bottom side opposite the top side. One or more laser emitters within the housing are configured to emit a beam through the port. A first cover assembly is positioned on the front side, the first cover assembly including a first safety cover and a first frame securing the first safety cover to the housing. The first safety cover is movable between a closed position covering the port and an open position not covering the port.

Abstract: A phosphor particle is configured to emit fluorescence longer in wavelength than excitation light entering the phosphor particle. The phosphor includes a concave portion which is no smaller than 0.1 times as large as the wavelength of the fluorescence and no larger than 10 times as large as the wavelength of the fluorescence. The concave portion is disposed on a surface of the phosphor particle.

Abstract: A light assembly includes a light source and a lens. The lens includes a hardcoat surface that protects the lens. The light source is positioned close to the lens, and a microtexture is defined in the hardcoat material to increase diffusion of the light to overcome the limitations of the close spacing between the lens and the light source. The hardcoat material and microtexture may be applied to both sides of the lens or one side of the lens. The light source may be a plurality of spaced apart LEDs. The microtexture may be applied to the entire surface of the lens or select regions of the lens. The microtexture is defined after the hardcoat is applied, and is defined via removal or disruption of hardcoat material. The microtexture may be defined in different ways to vary the appearance of the microtexture.

Abstract: A wavelength conversion member includes a support and a wavelength conversion layer including a first phosphor having a composition represented by Formula (1) and having an emission peak wavelength in a range from 550 nm to 620 nm, and a second phosphor having a different emission peak wavelength and/or a full width at half maximum from the first phosphor. An amount of the first phosphor in the wavelength conversion layer is in a range from 20 mass % to 80 mass % relative to a total amount of the phosphors In Formula (1), M1 represents at least one of rare earth elements other than La and Ce, a total molar content percentage of Y, Gd, and Lu in M1 is 90% or more, and p, q, r, and s satisfy 2.7?(p+q+r)?3.3, 0?r?1.2, 10?s?12, and 0<q?1.2.

Abstract: A quantum dot including a core including a first semiconductor nanocrystal including a Group III-V compound; and a semiconductor nanocrystal shell disposed on the core, the semiconductor nanocrystal shell including zinc, tellurium, and selenium, wherein the quantum dot does not include cadmium, and the semiconductor nanocrystal shell has a mole ratio of tellurium to selenium of less than about 0.025:1, a composition including the quantum dot, a quantum dot-polymer composite, a patterned layer including the composite, and an electronic device including the patterned layer.

Abstract: Disclosed herein is a solar light kit, comprising: a housing comprising a removably attached solar panel and a removably attached battery; a PCB comprising one or more light sources, the PCB configured to connect to the solar panel and the battery; a lens for diffusing light from the one or more light sources of the PCB, wherein the lens is configured to connect to the housing and the PCB; a plurality of removable fasteners for connecting the lens to one or more of the PCB and housing; and a tool for fastening the plurality of removable fasteners, wherein the housing, the PCB, the lens, the plurality of removable fasteners, and the tool are bundled together unassembled in a kit package.

Abstract: The present disclosure relates to a light emitting diode (LED) filament arrangement (100) which comprises an elongated, flexible LED filament (110) having a plurality of LEDs arranged along the elongation of the filament. The arrangement further comprises a bending unit (120) having a body in which a channel (121) is formed. A portion of the LED filament is arranged within the channel of the bending unit, and the bending unit is at least partially curved and adapted to induce a bend in the LED filament.