Abstract: A white light source and method of use thereof, wherein control of daily rhythm and pleasant lighting can be realized. Amounts of stimulation light emitted from a white light source to the intrinsically photosensitive retinal ganglion cells (ipRGCs) and visual cells of the L cone and M cone, are defined as a melanopic irradiance, an L-cone opic irradiance, and an M-cone opic irradiance, respectively; a ratio of the amounts of the stimulation light is expressed by formula (1); and A is the ratio corresponding to the emission spectrum of the white light source, and B is the ratio corresponding to the radiation spectrum of a black body having the same color temperature as the white light source, an amount of stimulation light emitted to the ipRGC is quantitatively changed by changing the emission intensity of the white light source satisfying formula (2). Melanopic irradiance/(L-cone opic irradiance+M-cone opic irradiance)??(1) 0.88?A/B?1.11??(2).

Abstract: A display device includes a plurality of pixels. At least one of the pixels includes a green light wavelength conversion layer, a color filter layer and a light path. The light path passes through the green light wavelength conversion layer and then passes through the color filter layer. The color filter layer includes a green pigment and a yellow pigment.

Abstract: In one aspect of the present disclosure, there is provided an optical wavelength conversion member including a polycrystalline ceramic sintered body containing, as main components, Al2O3 crystal grains and crystal grains represented by formula X3Al5O12:Ce. In the optical wavelength conversion member 9, atoms of element X are present also in an Al2O3 crystal grain adjacent to the interface between the Al2O3 crystal grain and an X3Al5O12:Ce crystal grain.

Abstract: A white light emitting device, a light bar and a light apparatus. A relative spectrum of the white light emitting device is ?(?). A relative spectrum of a black body radiation with a corresponding color temperature is S(?). An area normalization is performed on ?(?) and S(?) to convert an equal energy spectrum ??(?) of the white light emitting device and an equal energy spectrum S?(?) of the black body radiation with the corresponding color temperature. A degree of similarity R of the equal energy spectrum of the white light emitting device and the equal energy spectrum of the black body radiation satisfies the following formula: R = 1 - ? ? ? ? i ? ? n ? ? S ? ? ( ? ) - ? ? ? ( ? ) ? ? ? ? i ? ? n ? S ? ? ( ? ) , when ?i is 380 nm, ?n is 680 nm, R?85%.

Abstract: A method of enhancing penetration of a topical composition of 5-aminolevulinic acid (ALA) into tissue for photodynamic therapy includes topically applying ALA to a treatment area to be treated with photodynamic therapy. The method further includes, after the ALA is applied to the treatment area, covering the treatment area with a low density polyethylene barrier. The treatment area is covered with the low density polyethylene barrier prior to light treatment to minimize transepidermal water loss from the treatment area.

Abstract: A lighting assembly includes a lightbulb, sleeve, motor assembly, a control circuit, power source, first state, and second state. The control circuit is communicatively coupled to the power source, the lightbulb, and the motor assembly. The lightbulb emits ultra violet (“UV”) radiation. The sleeve converts UV radiation to visible light, is circumferentially positioned about the lightbulb, and is rotatably coupled to the lightbulb via the motor assembly. The motor assembly is mechanically coupled to the sleeve, and selectively rotates the sleeve about the lightbulb and thereby positions the lighting assembly in the first state or the second state. The sleeve includes a slit that emits the UV radiation from the lightbulb. In the first state, the lighting assembly emits UV radiation towards a surface. In the second state, the lighting assembly emits visible light towards the surface.

Abstract: A light-emitting device including a solid-state light source that emits light having a peak wavelength in the range of 480 nm or less and a fluorescent film that covers the solid-state light source and includes at least one kind of phosphor, wherein the fluorescent film includes at least one kind of near-infrared phosphor that is excited by light from the solid-state light source, has a peak wavelength in the range exceeding 700 nm, and has an emission spectrum with a full width at half maximum of 100 nm or more in a range including the peak wavelength.

Abstract: A light emitting diode package including a light emitting diode chip, a phosphor layer disposed to cover an upper portion of the light emitting diode chip, the phosphor layer being configured to convert a wavelength of light emitted from the light emitting diode chip, and a color filter layer disposed to cover an upper portion of the phosphor layer, the color filter being configured to block light having a predetermined wavelength range from being emitted through the phosphor layer.

Abstract: Provided is a backlight module including a light source, a light guide plate, and a composite color-conversion layer. The light source emits a blue light. The light guide plate is optically coupled to the light source and the blue light transmits through the light guide plate. The composite color-conversion layer is disposed on the light guide plate. The composite color-conversion layer includes at least three different populations of quantum dots. The at least three different populations of quantum dots at least include a plurality of cyan quantum dots or a plurality of yellow quantum dots.

Abstract: The present disclosure provides methods for generating white light. The methods use a plurality of LED strings to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.

Abstract: The present disclosure provides methods for generating tunable white light with controllable circadian energy performance. The methods use a plurality of LED strings to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output. Different light emitting modes can be selected that utilize different combinations of the plurality of LED strings in order to tune the generated white light. One or more of the LED strings can have ultraviolet or violet LEDs.

Abstract: The present disclosure proposes an improved apparatus and method for counting of sea lice by providing a stable and controlled light environment which ensures counting of sea lice reliably and independent of weather conditions and an optimized spectral power distribution and intensity of the light for improved observation (detectability) of sea lice with respect to fish skin. An embodiment of the disclosed light system comprises multiple LEDs, at least two LEDs providing a light colour with peaks in the range 490-540 nm (Cyan/Green) respectively 620-660 nm (Red).

Abstract: Provided are an ultrasound imaging apparatus and method for displaying an ultrasound image. The ultrasound imaging apparatus includes: a display; and a processor configured to set, from among a plurality of scan lines, a plurality of scan line groups respectively corresponding to a plurality of subframes constituting a first frame, control the display to display the first frame, set, from among the plurality of scan lines, a plurality of scan line groups respectively corresponding to a plurality of subframes constituting a second frame, and control the display to display the second frame subsequently to the first frame. The processor may set the plurality of scan line groups such that a position of a boundary line between adjacent ones of the plurality of subframes in the first frame does not overlap a position of a boundary line between adjacent ones of the plurality of subframes in the second frame.

Abstract: A light source device includes a semiconductor light-emitting device which emits coherent excitation light, and a wavelength conversion element which is spaced from the semiconductor light-emitting device, generates fluorescence by converting the wavelength of the excitation light emitted from semiconductor light-emitting device, and generates scattered light by scattering the excitation light. The wavelength conversion element includes a support member, and a wavelength converter disposed on the support member. The wavelength converter includes a first wavelength converter, and a second wavelength converter which is disposed around the first wavelength converter to surround the first wavelength converter in a top view of the surface of the support member on which the wavelength converter is disposed. The ratio of the intensity of fluorescence to that of scattered light is lower in the second wavelength converter than in the first wavelength converter.

Abstract: A low-pressure discharge lamp having a discharge vessel and a coating structure. The coating structure is formed on an inner side of the discharge vessel. The coating structure has nanoscale phosphate particles and/or nanoscale functional oxide. Alternatively or in addition, the phosphate particles are free or at least approximately free of rare earth metals. The nanoscale phosphate particles range in size from 5 nm to 800 nm.

Abstract: A phosphor layer composition, phosphor member, light source device, and projection device are provided that are capable of restraining reflection or scattering at interfaces between phosphor particles and a binder to improve the excitation-light absorption by, and the external quantum efficiency of, the phosphor particles. The present invention, in an aspect thereof, is directed to a phosphor layer composition including: phosphor particles 111 absorbing excitation light and emitting prescribed fluorescence; and a binder 112 composed of a translucent gel containing a metal alkoxide or a mixture of a metal alkoxide and a metal oxide, wherein the phosphor particles 111 are dispersed in the binder 112, and the phosphor particles 111 and the binder 112 differ in refractive index by 0.3 or less.

Abstract: A method for producing an optoelectronic device is disclosed. The method include preforming an inductive excitation of a current by an inductive component of the optoelectronic device such that the optoelectronic device emits electromagnetic radiation, measuring of at least one electro-optical characteristic of the optoelectronic device and applying a converter material to an emission side of the optoelectronic device, wherein a quantity of the converter material is determined from the measurement of the electro-optical characteristic.

Abstract: The present disclosure provides methods for generating tunable white light with controllable circadian energy performance. The methods use a plurality of LED strings to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output. Different light emitting modes can be selected that utilize different combinations of the plurality of LED strings in order to tune the generated white light. One or more of the LED strings can have ultraviolet or violet LEDs.

Abstract: The present disclosure provides methods for generating white light. The methods use a plurality of LED strings to generate light with color points that fall within blue, yellow/green, red, and cyan color ranges, with each LED string being driven with a separately controllable drive current in order to tune the generated light output.

Abstract: A light-emitting device 1 includes: a solid-state light-emitting element 10 that radiates a laser beam L; and a wavelength converter 50 including a plurality of types of phosphors which receive the laser beam L and radiate light. The phosphors 50 included in the wavelength converter are substantially composed of a Ce3+-activated phosphor. Then, output light of the light-emitting device 1 has a light component across a wavelength range of at least 420 nm or more and less than 700 nm. The light-emitting device 1 is capable of radiating light with high color rendering properties over a wide wavelength range.

Abstract: The present design includes a gas discharge lamp having a base, a closed top cylindrical envelope fixedly mounted to the base, the closed top cylindrical envelope comprising an integrally formed partition defining a pair of openings on opposite sides of the partition, and two electrodes positioned proximate the base, each electrode on an opposite side of the partition. Sides of the partition contact the closed top cylindrical envelope and the partition includes a notch formed proximate an upper edge of the partition thereby establishing an exclusive gas passageway between the pair of openings.

Abstract: A solid state lighting device includes at least one electrically activated solid state light emitter configured to stimulate emissions of first through third lumiphoric materials having peak wavelengths in ranges of from 485 nm to 530 nm, from 575 nm to 595 nm, and from 605 nm to 640 nm, respectively (or subranges thereof defined herein), with the third peak having a full width half maximum value of less than 60 nm. The resulting device generates aggregated emissions having a suitably high color rendering index (e.g., CRI Ra) value (e.g., at least 70), and also having a spectral power distribution with a Melanopic/Photopic ratio within a specified target range as a function of correlated color temperature, thereby providing increased perceived brightness.

Abstract: An electrode assembly for use in a dielectric barrier discharge plasma source comprises a base metal plate, an enamel layer on a surface of the base metal plate and embedded electrodes embedded in the enamel layer. The electrode assembly may be made by depositing a one or more layers of powdered glass over a surface of the base metal plate, fusing the powdered glass the one or more layers each in a separate heating step for the relevant layer. To form the embedded electrodes, a pattern of electrode material is provided over the powdered glass of the one or more layers after fusing the one or more layers. Subsequently one or more further layers of powdered glass are deposited over the electrodes and the layer(s) below it, and the powdered glass in each of the one or more further layers is fused in a separate heating step.

Abstract: Green emitting phosphors have the empirical composition RE1?wAwMxEy, where RE may be one or more Rare Earth elements (for example, Eu or Gd), A may be one or more elements selected from the group Mg, Ca, Sr, or Ba, M may be one or more elements selected from the group Al, Ga, B, In, Sc, Lu or Y, E may be one or more elements selected from the group S, Se, O, or Te, w is greater than or equal to zero, or greater than or equal to 0.01, or greater than or equal to 0.05, and less than or equal to about 0.8, 2?x?4, and 4?y?7.

Abstract: Embodiments of the invention include a semiconductor light emitting device, a first wavelength converting member disposed on a top surface of the semiconductor light emitting device, and a second wavelength converting member disposed on a side surface of the semiconductor light emitting device. The first and second wavelength converting members include different wavelength converting materials.

Abstract: A luminescent material mixture has a first luminescent material and a second luminescent material, wherein, under excitation with blue light, an emission spectrum of the first luminescent material has a relative intensity maximum in a yellowish-green region of the spectrum at a wavelength of greater than or equal to 540 nm and less than or equal to 560 nm and an emission spectrum of the second luminescent material has a relative intensity maximum in an orange-red region of the spectrum at a wavelength of greater than or equal to 600 nm and less than or equal to 620 nm.

Abstract: A backlight unit (lighting device) 12 includes LEDs (light source) 17, a light guide plate 19 including a light entry end surface 19b on at least a part of an outer peripheral end surface and a light output plate surface 19a on a plate surface, and a wavelength conversion sheet (wavelength conversion member) 20 disposed so as to overlap the light output plate surface 19a of the light guide plate 19 and containing a phosphor for wavelength-converting the light from the LEDs 17. Light from the LED 17 enters through the light entry end surface 19b and exits through the light output plate surface 19a. The wavelength conversion sheet 20 includes an increased phosphor portion 27 on at least a part of outer peripheral side portions 20OP thereof and the increased phosphor portion 27 has a phosphor content per unit area that is greater than that in a central portion 20IP.

Abstract: Packaged chip-on-board (COB) LED arrays are provided where a color conversion medium is distributed within a glass containment plate, rather than silicone, to reduce the operating temperature of the color conversion medium and avoid damage while increasing light output. A lighting device is provided comprising a chip-on-board (COB) light emitting diode (LED) light source, a light source encapsulant, a distributed color conversion medium, and a glass containment plate. The COB LED light source comprises a thermal heat sink framework and at least one LED and defines a light source encapsulant cavity in which the light source encapsulant is distributed over the LED. The glass containment plate is positioned over the light source encapsulant cavity and contains the distributed color conversion medium. The light source encapsulant is distributed over the LED at a thickness that is sufficient to encapsulate the LED and define encapsulant thermal conduction paths.

Abstract: A backlight module includes a light source, a light guide plate and a light-adjusting member. A light source chromaticity is measured from light generated by the light source. The light guide plate has a light-incident surface and a light-emitting surface. Light generated by the light source enters the light guide plate and emits out from the light-emitting surface. With the light-adjusting member, a first light guide plate chromaticity is measured from the light-emitting surface. There is a first difference value between the first light guide plate chromaticity and the light source chromaticity. Without the light-adjusting member, a second light guide plate chromaticity is measured from the light-emitting surface. There is a second difference value between the second light guide plate chromaticity and the light source chromaticity. The first difference value is different from the second difference value.

Abstract: A display device is disclosed. The display device includes a display panel, a light guide plate located in a rear of the display panel, a light assembly located on a side of the light guide plate and providing the light guide plate with light, and a light absorbing portion formed on a back surface or a front surface of the light guide plate and absorbing the light provided by the light assembly in a predetermined wavelength range.

Abstract: A wavelength conversion sheet includes a phosphor, and one or more barrier films that seal the phosphor. At least one of the barrier films includes a coating layer having an optical function. The coating layer is provided to a surface of the barrier film.

Abstract: According to one embodiment, a container case accommodating an optical member includes a bottom wall, sidewalls provided to stand along side edges of the bottom wall, and flanges extending from the sidewalls. The container case is formed of a reflective sheet or reflective film.

Abstract: This application is directed to a method of treating a patient with acne by applying a photodynamic agent to skin having acne lesions, waiting at least 12 hours, and then exposing the skin to which the photodynamic agent has been applied to light that causes an activation reaction.

Abstract: A light emitting device includes a base, a first light emitting element, a second light emitting element, and a sealing member. The first light emitting element has an active layer of a nitride semiconductor and has a first emission peak wavelength in a blue region. The second light emitting element has an active layer of a nitride semiconductor and has a second emission peak wavelength longer than the first emission peak wavelength of the first light emitting element. The sealing member includes a first region and a second region. The first region contains a phosphor to be excited by light from the first light emitting element. The first region is provided on an element mounting surface. A first upper surface of the first light emitting element is located in the first region. The second region does not substantially contain the phosphor and is provided on the first region.

Abstract: The invention relates to a lighting system for lighting a space (R) which lighting system has means (4) for producing space illumination over a large area, and means (5) for producing concentrated local lighting. Furthermore the lighting system has a presence detector (6) for detecting the presence of at least one person (P) in the space (R) and a control device (8) for controlling the means (4) for producing the space illumination and the means (5) for producing the local lighting. To this end the control device (8) is configured to control the space illumination over a large area automatically as a function of the daylight or as a function of the daytime and to control the local lighting automatically as a function of the presence of at least one person (P) in the space (R). Because the space illumination is controlled automatically as a function of the daylight or of the daytime, the illumination can be prevented from being reduced so much that a lighting mood is produced which has a negative effect.

Abstract: The invention provides a lighting device (1) comprising (a) a light source (10) configured to generate light source light (11), and (b) a light converter (100) configured to convert at least part of the light source light (11) into visible converter light (111), wherein the light converter (100) comprises a matrix (120) containing an organic luminescent material (140) of the benzoxanthene derivative type. The lighting device may further comprise a further luminescent material (130).

Abstract: Hybrid nanoparticles and transparent light guides using the hybrid nanoparticles are disclosed. In some examples, a hybrid nanoparticle may include an organic blue-light emitting material, and an inorganic material bonded to the organic blue-light emitting material.

Abstract: A device and method of providing a versatile illuminated panel for walls, product displays, and other surfaces is described. Panels are constructed from a variable number of rectangular illuminated tiles, where the tiles mate edge-to-edge so as to create a nearly seamless visual panel effect. Illumination within each tile is uniform to also create a nearly seamless visual panel effect. End-users may create panels of varying sizes and shapes by using different quantities of a standard tile. The software within the invention automatically determines the number and arrangement of tiles within each assembled panel. Each tile comprises a plurality of illuminators, an optical means to distribute light from the illuminators uniformly across the tile, and at least one communication interface. In one embodiment the tiles are linked into a communications tree-structure; and the location of each tile within the tree constitutes its logical address.

Abstract: A light converter, and lights and displays incorporating the light converter are disclosed together with methods of making the light converter. The light converter has a substrate having a first layer of phosphor particles disposed on an area of one surface of the substrate. The first layer has a thickness of about 1 monolayer of phosphor particles, and the phosphor particles in the first layer form a uniform and dense layer. The thickness of the substrate can be between about 25 ?m and about 500 ?m in embodiments intended to be flexible and between about 0.5 mm and 2 mm in embodiments that can be formed into rigid shapes. The screen weight of the phosphor particles is between about 0.5 mg/cm2 and about 40 mg/cm2. The substrate can include a base layer and an adhesive layer.

Abstract: A preparation method of a glass film, a photoelectric device and a packaging method thereof, and a display device are provided, and the preparation method of a glass film includes: forming a sacrificial layer on a base substrate; forming a glass frit film on the sacrificial layer; solidifying the glass frit film; and removing the sacrificial layer, so as to obtain a glass film. The method can bring an individual glass film, which is helpful to a narrow-bezel design of a photoelectric device.

Abstract: A light-emitting diode module for emitting white light includes a first light emitting diode chip for generating radiation in the blue spectral range having a first peak wavelength, a second light emitting diode chip for generating radiation in the blue spectral range having a second peak wavelength, a third light emitting diode chip for generating radiation in the red spectral range having a third peak wavelength, a first and a second phosphors disposed downstream of the first and the second light emitting diode chips, respectively. The first light emitting diode chip with the first phosphor generates a first mixed radiation and the second light emitting diode chip with the second phosphor generates a second mixed radiation. The first phosphor exhibits a first absorption maximum at a wavelength greater than the first peak wavelength. The second phosphor exhibits a second absorption maximum at a wavelength less than the second peak wavelength.

Abstract: A method of manufacturing Ce:YAG polycrystalline phosphor with the formula (Y1-x-mAxCem)3(Al1-yBy)5O12; 0?x?1, 0?y?1, 0?m?0.05; wherein A is one of Lu, Tb, Pr, La and Gd; and wherein B is one of Ga, Ti, Mn, Cr and Zr.

Abstract: A bulb head structure and an LED bulb comprising the same are provided. The bulb head structure includes a hollow-shaped member which is a hollow cup-shaped structure, and an outer surface of an end is disposed with a lampholder connecting part, an inner insulating member, a substrate, two flexible electrode members which are respectively disposed at side edge and one end of the substrate, and a conduction member. The inner insulating member and the substrate are disposed in the hollow-shaped member, the inner insulating member is adjacent to one end of the hollow-shaped member, and the substrate and the conduction member are respectively disposed at two sides of the inner insulating member. Wherein, one flexible electrode member contacts with the hollow-shaped member and the other flexible electrode member contacts with the conduction member to enable the substrate electrically connecting to the hollow-shaped member and the conduction member respectively.

Abstract: A light-extraction apparatus for an optical-film lighting set having a visible-light coating include a transparent sealed body, a wide AOR (0 degree to 90 degrees) optical film for reflecting ultraviolet lights and a visible light layer. The transparent sealed body is formed as a hollow shell body to accommodate an ultraviolet light source. A supporting member coated with the optical film and the visible light layer is constructed to a wall of the shell body or inside the shell body. The visible light layer is consisted of monolayered fluorescent or phosphorescent particles, and the particles are evenly distributed to coat on the interior wall of the shell body or the supporting member inside the shell body in a sparse scattering manner. A fixed area ratio of the coverage of the particles to that of the inter-particle spacing is then provided to the visible light layer for obtaining a higher illumination performance.

Abstract: A light emitting device comprising: a base; a light emitting element arranged on a surface of the base; a first resin layer arranged to surround a side portion of the light emitting element and to be spaced apart from the side portion; and a second resin layer arranged on the surface of the base, the second resin layer being present at least on a top of the light emitting element, on a top of the first resin layer, and in an area between the light emitting element and the first resin layer, wherein the first resin layer comprises a light transmissive resin and a first fluorescent material, wherein the second resin layer comprises a light transmissive resin and a second fluorescent material, and wherein the second fluorescent material exhibits higher heat resistance than that of the first fluorescent material.

Abstract: A blue phosphor having an emission peak wavelength different from that of conventional blue phosphors, a method for producing the same, and a high-intensity luminescent device using the phosphor are provided. The phosphor of the present invention is represented by a general formula MeaRebAlcSidOeNf (Me may contain one or more elements selected from Mg, Ca, Sc, Y, and La as second elements, provided that Sr or Ba is contained as an essential first element, and Re may contain one or more elements selected from Mn, Ce, Tb, Yb, and Sm as second elements, provided that Eu is contained as an essential first element), where the composition ratio represented by a, b, c, d, e, and f has the following relations: a+b=1, 0.005<b<0.25, 1.60<c<2.60, 2.50<d<4.05, 3.05<e<5.00, and 2.75<f<4.40.

Abstract: The invention provides a a luminescent material comprising particles of UV-luminescent material having a coating, wherein the coating (a “multi-layer coating”) comprises a first coating layer and a second coating layer, wherein the first coating layer is between the luminescent material and the second coating layer, and wherein in a specific embodiment the second coating layer comprises an alkaline earth oxide, especially MgO. Further, the invention provides a lighting unit comprising such luminescent material.

Abstract: A phosphor-enhanced light source and a luminaire is provided comprising a light exit window, a light emitter, a luminescent layer. The light emitter emits light of a first color distribution towards the light exit window. The luminescent layer comprises first second areas, forming a pattern. A first characteristic of the first area is similar to a second characteristic of the second area to obtain a first light emission by the first area into the ambient and a second light emission by the second area into the ambient. The respective light emissions are experienced as similar by the viewer if the light emitter is in operation. A first reflection characteristic of the first area is different from a second reflection characteristic of the second area to obtain a first ambient light reflection by the first area that is different from a second ambient light reflection by the second area.

Abstract: The efficiency and color contrast of a lighting device may be improved by using wavelength shifting material, such as a phosphor, to absorb less desired wavelengths and transmit more desired wavelengths. A double-notch reflective filter may pass desired wavelengths such as red and green, while returning or reflecting less desired wavelengths (blue and yellow) away from an optical exit back toward wavelength shifting material and re-emitted as light of more desirable wavelengths.

Abstract: An optoelectronic semiconductor device includes a first light source that emits green, white or white-green light and includes a semiconductor chip that emits in the blue spectral range, and a first conversion element attached directly to the semiconductor chip, a second light source that emits red light, having a semiconductor chip, that emits in a blue spectral range, and having a second conversion element attached directly to the semiconductor chip, and/or having a semiconductor chip that emits in a red spectral range, a third light source that emits blue light and has a semiconductor chip emitting in the blue spectral range, and a filler body having a matrix material into which a conversion agent is embedded, wherein the filler body is disposed downstream of the light sources collectively.