Abstract: According to one embodiment, a white light source includes a combination of a light emitting diode and phosphors. One of the phosphors is at least a cerium activated yttrium aluminum garnet-based phosphor. There is no light emission spectrum peak at which a ratio of a largest maximum value to a minimum value is greater than 1.9. The largest maximum value is largest among at least one maximum value present in a wavelength range of 400 nm to 500 nm in a light emission spectrum of white light emitted from the white light source. The minimum value is adjacent to the largest maximum value in a longer wavelength side of the light emission spectrum.

Abstract: The present disclosure provides a face plate for securing onto an electrical receptacle box, an electrical device recognition safety system, and a method of making a wall mounted electrical device safer and more easily identified. The face plate can include a plate body having an opening and a plurality of zones. The plurality of zone can surround the opening. The plurality of zones can include a first zone and the second zone. The first zone can have a visual contrast with the second zone.

Abstract: A light source device which is miniaturized, can be manufactured at low cost, and is suitable as an illumination light source of a display device of an electronic device such as an HUD and an aerial floating image display apparatus is provided. The light source device includes: a light source configured to generate white light by irradiating a phosphor with light emitted from a solid-state light source; a collimating optical system (15) configured to convert a divergent light flux of the white light emitted from the light source into parallel light; a light guide configured to cause the light emitted from the collimating optical system (15) to be incident as incident light and emit the incident light in a direction different from an incident direction; and a filter configured to reflect light in a blue region of the parallel light to irradiate the phosphor.

Abstract: A vehicle display system may include a light guide, a quantum dot film arranged adjacent with the light guide and configured to receive blue light from the light guide and convert the blue light to red and green light, at least one buffer film, and a blue color filter arranged between the quantum dot film and the at least one buffer film, the blue color filter configured to transmit blue light back to the quantum dot film to further convert the red and green light.

Abstract: A light-source optical system includes a wavelength converter on which light of first color is incident, the wavelength converter converting at least a part of the light of first color into light of second color different from the light of first color, a first optical system disposed upstream from the wavelength converter on an optical path of the light of first color, the first optical system including optical elements, a reflection plane disposed downstream from the first optical system on the optical path, and a second optical system disposed downstream from the reflection plane on the optical path. The reflection plane reflects one of the light of first color and the light of second color, and a conditional expression 0<?L/D<0.2 is satisfied.

Abstract: A flexible card having a transaction display is introduced. The flexible card includes a card body, a flexible electric control mechanism, a flexible display unit and a light emitting unit. The flexible card body includes a first plate and a second plate combined with each other. The flexible electric control mechanism is disposed between the first plate and the second plate and includes a circuit carrier board and transaction processing mechanism. The flexible display unit is disposed on the circuit carrier board and is electrically connected to the transaction processing mechanism. Thus, the flexible electric control mechanism can be stably combined in the flexible card body to improve structural stability and reliability. During use, the transaction processing mechanism performs a transaction with a payment apparatus, and the flexible display unit and the light emitting unit output transaction information, achieving enhanced transaction security and convenience.

Abstract: Provided is a color wheel. The color wheel includes a substrate, a conversion layer disposed on the substrate for wavelength conversion of incident light and obtaining irradiated laser, a first filter layer for filtering the irradiated laser to obtain a first light for modulating an image in a first color gamut range, and a second filter layer for filtering the irradiated laser to obtain a second light for modulating an image in a second color gamut range. Planes, in which the light incident surface of the conversion layer, the light incident surface of the first filter layer and the light incident surface of the second filter layer are located respectively, are parallel or coincide with each other.

Abstract: A lighting arrangement (100), comprising a first solid state light source (110) arranged to emit visible light, a second solid state light source (130) arranged to emit second light of at least one of violet light and ultraviolet (UV) light, a reflector (140) comprising at least one light-reflecting surface (145), wherein the reflector at least partially encloses the first and second solid state light sources, and wherein at least part of the reflector defines a mixing chamber (150) for mixing the visible light and the second light, a light exit window (160), wherein the visible light and the second light mixed by the mixing chamber are arranged to exit the lighting arrangement through the light exit window, and a third solid state light source (170) arranged to emit UV light, wherein the third solid state light source is arranged outside the mixing chamber.

Abstract: The laser device includes a substrate, a laser element disposed on the substrate for emitting a laser light ray, a light guide member disposed on the substrate, and a wavelength conversion layer. The light guide member is light-transmissible and thermally conductive, and has at least one reflection surface for reflecting the laser light ray from the laser element so as to change travelling direction of the laser light ray. The wavelength conversion layer converts wavelength of the laser light ray from the light guide member to result in a laser beam, and contacts the light guide member so that heat from the wavelength conversion layer is transferred to the substrate through the light guide member.

Abstract: A light emitting device includes: a substrate; a light emitting element disposed on the substrate; a first wavelength conversion member disposed on the light emitting element and having a lower surface bonded to the light emitting element, an upper surface opposite the lower surface, and a lateral surface that meets the upper surface; a first light reflecting member disposed on an upper surface of the substrate and covering lateral surfaces of the light emitting element; and a second wavelength conversion member disposed on the first light reflecting member, on the upper surface of the substrate, and on the lateral surface of the first wavelength conversion member without covering the upper surface of the first wavelength conversion member.

Abstract: The invention provides a light generating system (1000) configured to provide system light (1001), wherein the light generating system (1000) comprises (i) a first light generating device (110), (ii) a second light generating device (120), and (iii) a waveguide (400), wherein: —the waveguide (400) has a first face (401), a second face (402), and a side face (403) bridging the first face (401) and the second face (402); —the first light generating device (110) is configured to generate first device light (111), wherein in an operational mode the first device light (111) has a color point in the visible; the first light generating device (110) is configured to irradiate the side face (403), wherein in an operational mode at least part of the first device light (111) escapes from the waveguide (400) via the first face (401); and—the second light generating device (120) is configured to generate second device light (121), wherein in an operational mode the second device light (121) has a centroid wavelength of at

Abstract: A light source device which is miniaturized, can be manufactured at low cost, and is suitable as an illumination light source of a display device of an electronic device such as an HUD and an aerial floating image display apparatus is provided. The light source device includes: a light source configured to generate white light by irradiating a phosphor with light emitted from a solid-state light source; a collimating optical system (15) configured to convert a divergent light flux of the white light emitted from the light source into parallel light; a light guide configured to cause the light emitted from the collimating optical system (15) to be incident as incident light and emit the incident light in a direction different from an incident direction; and a filter configured to reflect light in a blue region of the parallel light to irradiate the phosphor.

Abstract: A display panel includes: a light emitting device to generate light; a plurality of color conversion patterns including: a first color conversion pattern including first scattering particles dispersed in the first color conversion pattern and configured to scatter the light of the light emitting device; and a second color conversion pattern including second scattering particles dispersed in the second color conversion pattern and configured to scatter the light of the light emitting device; a plurality of color filters including: a first color filter overlapping the first color conversion pattern; and a second color filter overlapping the second color conversion pattern; and a single, low index of refraction layer continuously extending in the surface direction to overlap the first and the second color conversion patterns. The low index of refraction layer has a refractive index lower than refractive indexes of the first and second color conversion patterns.

Abstract: The invention provides a luminescent arrangement (2000) comprising an array (2005) of luminescent bodies (2100), and a matrix (2210) at least partly configured between the luminescent bodies (2100), wherein the luminescent bodies (2100) comprise a first luminescent material (2110), wherein the matrix (2210) comprise a light transmissive material (2215), wherein the light transmissive material (2215) comprises a second luminescent material (2220), wherein the first luminescent material (2110) and the light transmissive material (2215) are different materials; and wherein the luminescent bodies (2100) comprise ceramic bodies.

Abstract: A vehicle display system may include a light guide, a quantum dot film arranged adjacent with the light guide and configured to receive blue light from the light guide and convert the blue light to red and green light, at least one buffer film, and a blue color filter arranged between the quantum dot film and the at least one buffer film, the blue color filter configured to transmit blue light back to the quantum dot film to further convert the red and green light.

Abstract: A phosphor powder of the present invention is a phosphor powder which contains an inorganic compound in which Eu as an activator is solid-soluted in a crystal represented by Ba26Si51O2N84 or in an inorganic crystal having the same crystal structure as the crystal represented by Ba26Si51O2N84, and which is constituted such that in an emission spectrum obtained by irradiating the phosphor powder with excitation light having a wavelength of 450 nm, when a luminescence intensity at a peak wavelength in a range of equal to or more than 750 nm and equal to or less than 950 nm is P0, and when a luminescence intensity at a peak wavelength in a range of equal to or more than 520 nm and equal to or less than 600 nm is P1, 0.01?P1/P0?0.12 is satisfied by P0 and P1.

Abstract: A direct-light generator includes an optical unit positioned downstream of an output surface of a collimated light source and upstream from a first emitting surface with respect to a direct light direction. The optical unit includes a first planar light mixing element characterized by a first response function having a first angular profile with a peak having a first divergence angle, and a second planar light mixing element characterized by a second response function having a second angular profile with a peak having a second divergence angle. The first planar light mixing element at least partially intercepts collimated light exiting the output surface of the collimated light source and defines a unit input surface. The second planar light mixing element is positioned downstream of the unit input surface to at least partially intercept light crossing the unit input surface and to define a unit emitting surface.

Abstract: Provided is a wavelength conversion member which is made of a phosphor powder dispersed in a glass matrix and has an excellent luminous efficiency. A wavelength conversion member is comprising: a phosphor powder dispersed in a glass matrix, wherein the glass matrix has a refractive index (nd) of 1.6 or more and a liquidus temperature of 1070° C. or below.

Abstract: A wavelength conversion device according to the present disclosure includes a wheel substrate, a phosphor layer formed on the wheel substrate, and a cooling fin unit disposed on the wheel substrate. The cooling fin unit has a base part to be bonded to the wheel substrate. A surface of the wheel substrate includes a first area corresponding to the phosphor layer, and a second area located closer to the central axis than the first area, the surface of the wheel substrate and a surface at the wheel substrate side of the base part are separated from each other to form a space between the wheel substrate and the base part, and a coupling part configured to thermally couple the surface of the wheel substrate and the surface at the wheel substrate side of the base part is disposed in at least the second area of the second surface.

Abstract: A lighting device (1) is disclosed comprising a transmissive housing (3) and a filament (10) within said transmissive housing. The filament comprises a transmissive substrate (20) carrying a plurality of solid state lighting elements (30) and a phosphor containing resin coating (40) enveloping said filament. The resin coating includes at least one region (42) leaking light produced by said solid state lighting elements that is unconverted by said phosphor and the transmissive housing carries a further phosphor layer (7) covering part of the transmissive housing for each of said regions of the resin coating, each of said further phosphor layers being arranged to receive said unconverted light leaking from at least one of said regions. Also disclosed is a method of manufacturing such a lighting device.

Abstract: A wavelength conversion device includes a substrate, a reflection layer, a wavelength conversion layer, and a first optical layer. The wavelength conversion device has a central axis. The reflection layer is disposed on an upper surface of the substrate. The central axis is perpendicular to the upper surface. The wavelength conversion layer is disposed on the reflection layer and around the central axis, has a complete or partial annular shape, and includes a first region and two second regions. The first region is located between the second regions. The first optical layer is disposed on a surface of the wavelength conversion layer and corresponds to the first region. In an axial direction, an orthographic projection of the first optical layer on the upper surface is not overlapped with an orthographic projection of the second regions on the upper surface. The first optical layer includes first diffusing particles.

Abstract: A wavelength conversion device and a light source system, including: a substrate; a first light-emitting portion disposed on the substrate, wherein the first light-emitting portion includes a first light guide area and a counterweight area provided on the same layer as the first light guide area, the first light guide area being used for guiding first light, and the counterweight area being used for making the weight distribution of the wavelength conversion device substantially uniform; and a second light-emitting portion provided on the substrate on the same side as the first light-emitting portion, the second light-emitting portion including a conversion area, and the conversion area being used to convert at least a part of excitation light into excited light for emission when the excitation light is received.

Abstract: A wheel provided by the disclosure includes a substrate, a driving component, a clamping element and a balance component. The driving component is connected to the substrate, and is configured to drive the substrate to rotate about the axis of the driving component as the central axis. The clamping element is arranged on the substrate along the axis, and the clamping element includes a plurality of protruding structures. The balance component includes a balance substance and an adhesive. The balance substance is arranged on the protruding structure, and the adhesive covers the balance substance and the protruding structure to fix the balance component on the clamping element. The wheel and projection device provided by the disclosure have better structural reliability and heat dissipation efficiency.

Abstract: The invention provides a light generating system (1000) comprising a light generating device (100), a luminescent material layer (200), and optics (400), wherein: (I) the light generating device (100) is configured to generate polarized laser radiation (101); (II) the luminescent material layer (200) comprises a luminescent material (210) configured in a light-receiving relationship with the light generating device (100) and configured to convert at least part of the polarized laser radiation (101) into luminescent material radiation (211); (III) the light generating system (1000) is configured to generate in an operational mode system light (1001) at least comprising the luminescent material radiation (211); (IV) the optics (400) comprise first optics (410) and second optics (420); wherein the first optics (410) are configured to change the polarization of the polarized laser radiation (101), and wherein the second optics (420) have one or more of (i) a polarization dependent transmission and (ii) a polariza

Abstract: A light source system and a projection apparatus are provided. The light source system includes a first light source, a second light source including a second blue laser light source, a wavelength conversion element configured to convert second blue laser light into excited light, and a controller. The first light source includes a first blue laser light source configured to emit first blue laser light, a red laser light source configured to emit red laser light, and a green laser light source configured to emit green laser light. The controller controls the first and second blue laser light sources, the red laser light source, and the green laser light source to combine the first blue laser light, the red laser light, and the green laser light to form light source light, or to combine the first blue laser light and the excited light to form the light source light.

Abstract: An optical system of the disclosure includes: a fluorescent unit that includes a phosphor region excited by a first color light beam to output fluorescent light including at least one color light beam, and outputs the first color light beam in a first period and outputs the fluorescent light in a second period; one or two light valves illuminated by at least one of the first color light beam or the fluorescent light; and a region division element including first and second regions and disposed on an optical path between the fluorescent unit and the one or two light valves, the first region outputting the first color light beam and the fluorescent light from the fluorescent unit to be able to reach the one or two light valves, the second region outputting the fluorescent light from the fluorescent unit to be able to reach the one or two light valves.

Abstract: An illumination system, configured to provide an illumination beam, is provided. The illumination system includes a first excitation light source, a wavelength conversion element, and a controller. The first excitation light source is configured to provide a first excitation beam. The wavelength conversion element is located on a transmission path of the first excitation beam. The wavelength conversion element includes multiple wavelength conversion regions and multiple non-wavelength conversion regions. The controller controls whether the first excitation light source emits light. During a first time interval, the controller turns off the first excitation light source. During a second time interval, the controller controls the first excitation light source to emit light. The first excitation beam is transmitted to one of the wavelength conversion regions to form a converted beam. The illumination beam includes the converted beam. Another illumination system and multiple projection devices are also provided.

Abstract: A light source system includes a first light emitter configured to emit a first light with a first color band in a first time interval of a time period, a second light emitter configured to emit a second light with a second color band in a second time interval of the time period rather than in the rest of the time period other than the second time interval, and a light guide disposed downstream from the first light emitter and the second light emitter. The first time interval and the second time interval overlap in an overlapping time interval. The first light emitter and the second light emitter synchronously emit the first light and the second light in the overlapping time interval to form a combined light beam in the light guide. The light with the second color band is dominant of the combined light beam.

Abstract: A nano-structure layer is disclosed. The nano-structure layer includes an array of nano-structure material configured to receive a first light beam at a first angle of incidence and to emit the first light beam at a second angle greater than the first angle, the nano-structure material each having a largest dimension of less than 1000 nm.

Abstract: A light source is provided that includes a laser operable to emit laser light at a wavelength in a range from 460 nanometers to 470 nanometers and a converter assembly arranged so as to absorb the laser light emitted by the laser and to emit photoluminescent light produced by the laser light and having a longer wavelength than the laser light. The converter assembly has a converter element with a ceramic doped with Eu3+ such that under irradiation of the laser light the converter assembly emits photoluminescent light in the red spectral range.

Abstract: A construction component forms at least a part of a structure that faces a target space. The construction component has a first function, a second function, and a third function. The first function is a function of emitting illumination light toward the target space. The second function is a function of allowing incident light to enter the construction component. The incident light is emitted from a light source disposed out of a projection area, viewed from the target space, of the construction component and is incident on the construction component via a light transmission member. The third function is a function of converting the incident light into the illumination light.

Abstract: An electronic lighting device and a method for manufacturing the same are disclosed. The electronic lighting device includes an outer shell with a first opening at a top surface and a core contained within the outer shell. The core includes a left semicircular structure and a right semicircular structure arranged to form a circular shape that is aligned with the first opening at the top surface of the outer shell. The device includes a flame component positioned partially in the internal cavity. The device also includes a light emitting element disposed at least partially in a lighting element installation cradle on a sidewall of the core to hold the light emitting element at a non-zero angle with respect to a longitudinal axis of the electronic lighting device to allow illumination of the flame component. The device further includes a control circuit to control an operation of the lighting emitting element.

Abstract: A light-source device includes an excitation light source; an optical element having a reflecting surface to reflect first colored light emitted from the excitation light source; and a wavelength conversion unit including a waveform conversion member configured to convert at least a portion of the first colored light reflected by the optical element and incident on the wavelength conversion unit, into second colored light having a wavelength different from a wavelength of the first colored light and emit the second colored light. A point P does not intersect with a light flux Q where the point P is a center of the first colored light on the reflecting surface of the optical element and the light flux Q is a light flux of the first colored light emitted from the wavelength conversion unit.

Abstract: A colour wheel assembly, a light source system provided with the same, and a projection device are provided, a boron nitride coating being arranged on the side of the colour wheel assembly corresponding to a red fluorescent area and the other side being provided with glass powder, and the two sides of a non-red fluorescent area both being provided with a glass powder coating layer. By means of arranging boron nitride material in a position corresponding to a red fluorescent area, as the boron nitride material has good thermal conductivity relative to the glass powder and the crystal structure of the boron nitride is a layered structure, having the effect of effectively blocking light and thereby further reducing the excitation light incident on the red fluorescent powder, attenuation of the red fluorescence under the direct excitation of strong excitation light can be effectively prevented.

Abstract: A light emitting device includes a substrate, a plurality of first light emitting elements mounted on the substrate, including first LED dies, and emitting light having a first wavelength, and a light guide layer arranged so as to cover the plurality of first light emitting elements, and guiding the light from the plurality of first light emitting elements, wherein when LG1 is a distance between the first LED dies, and ?c is a critical angle of the light emitted from the light guide layer to the air, and a thickness T between the upper surfaces of the first light emitting elements and the upper surface of the light guide layer is equal to or longer than T1 indicated by T1=LG1/(2tan ?c).

Abstract: A light source module including first and second light sources, first and second wavelength conversion units, first and second light-splitting units is provided. The first light source emits a first light having a first wavelength. The first wavelength conversion unit converts at least one portion of the first light into a first converted light having a second wavelength. The second light-splitting unit allows the light having the first wavelength to travel through and reflects the light having the second wavelength. The second light source emits a second light having the first wavelength. The second wavelength conversion unit converts at least one portion of the second light into a second converted light having the second wavelength. The first light-splitting unit disposed between the first and the second wavelength conversion units reflects the light having the first wavelength and allow the light having the second wavelength to travel through.

Abstract: A light emitting device includes a substrate, a plurality of light sources disposed on the substrate, and a plurality of light reflecting members disposed on the substrate. The light reflecting members respectively include wall parts each surrounding each of the light sources individually or two or more of the light sources in groups. Two adjacent ones of the light reflecting members are joined to each other such that outer surfaces of the wall parts of the two adjacent ones of the light reflecting members are bonded to each other via an adhesive agent.

Abstract: The laser device includes a substrate, a laser element disposed on the substrate for emitting a laser light ray, a light guide member disposed on the substrate, and a wavelength conversion layer. The light guide member is light-transmissible and thermally conductive, and has at least one reflection surface for reflecting the laser light ray from the laser element so as to change travelling direction of the laser light ray. The wavelength conversion layer converts wavelength of the laser light ray from the light guide member to result in a laser beam, and contacts the light guide member so that heat from the wavelength conversion layer is transferred to the substrate through the light guide member.

Abstract: A color filter unit having improved optical efficiency and color reproduction and a display apparatus including the color filter unit are provided. The display apparatus includes a first pixel, a second pixel, and a third pixel on a first substrate, the first pixel, the second pixel, and the third pixel are configured to emit light of different colors from one another, wherein each of the first pixel and the second pixel includes a display element, a light scattering layer corresponding to the display element, the light scattering layer comprising first scattering particles and first quantum dots, and a color conversion layer on the light scattering layer, the color conversion layer including second scattering particles and second quantum dots configured to convert incident light into light of a set color.

Abstract: Provided is a light emitting device, including a first light emitting element having a light emission peak wavelength within a range of 400 nm or more and 490 nm or less, a second light emitting element having a different light emission peak wavelength from the first light emitting element within a range of 400 nm or more and 490 nm or less, a first fluorescent material that is excited by at least one of the first light emitting element and the second light emitting element and emits light having a light emission peak wavelength within a range of 500 nm or more and 540 nm or less, and a second fluorescent material, wherein the first fluorescent material is a Ce-activated aluminate fluorescent material containing Lu, Al, and Ga, and optionally at least one element selected from rare earth elements other than Lu.

Abstract: A method of manufacturing a light emitting device includes: bonding a light emitting element and a light transmissive member by a surface activated bonding method, which includes: activating a first bonding surface of the light emitting element to which the light transmissive member is to be bonded, by irradiating at least the first bonding surface with an ion beam, activating a second bonding surface of the light transmissive member to which the light emitting element is to be bonded, by irradiating at least the second bonding surface with an ion beam, and joining the light emitting element and the light transmissive member by bringing the activated first bonding surface and the activated second bonding surface into contact.

Abstract: A display apparatus includes: a first to third light-emitting element, each including an emission layer to emit light in a first direction, an encapsulation layer covering the first to third light-emitting elements; a first light-shielding layer arranged on the encapsulation layer, the first light-shielding layer including a first set of opening portions respectively corresponding to the first to third light-emitting elements; a metal layer arranged on an inner surface defining the first set of opening portions, wherein a width of the metal layer in a second direction normal (or perpendicular) to the first direction gradually decreases along the first direction; and a first color conversion layer; a second color conversion layer; and a light-transmitting layer, the first color conversion layer, the second color conversion layer, and a light-transmitting layer respectively corresponding to the first to third light-emitting elements.

Abstract: The invention discloses color conversion film which, upon ex-citation by blue light, emits green and red light. The films comprise at least one red light emitting layer, one green light emitting layer and sandwiched in between at least one separation layer.

Abstract: A lighting fixture appears as a skylight and is referred to as a skylight fixture. First and second light engines of the fixture provide different color points, peak light intensity angles, far-field light distribution characteristics, and/or circadian stimulus values. A skylight fixture may include a sky-resembling assembly and a plurality of sun-resembling assemblies, with dedicated optical assemblies and/or light sources. A lighting fixture may include multiple waveguides that different extraction feature patterns and/or may be sequentially arranged.

Abstract: A device including a phosphor layer having a plurality of holes or pockets arranged within the phosphor layer to reduce lateral light transmission. The phosphor layer can be sized and positioned to extend over a plurality of LED emitter pixels.

Abstract: A light source device includes a light source, a plurality of wavelength conversion units, and a plurality of optical systems. The plurality of wavelength conversion units each includes a wavelength conversion region configured to receive light emitted from the light source and emit light with a wavelength different from a wavelength of the received light. The plurality of optical systems are configured to form images of wavelength conversion regions of the plurality of wavelength conversion units. The light source is configured to irradiate the wavelength conversion units with light at a same timing. The plurality of optical systems are configured to cause the images of the wavelength conversion regions of the plurality of wavelength conversion units to be adjacent to or superimposed on each other.

Abstract: This application relates to the field of lighting, and discloses an LED filament including: at least one LED section, each LED section including at least two LED chips, adjacent LED chips being electrically connected to each other; electrodes, electrically connected to the LED section; and a light conversion layer, wrapping the LED section and parts of the electrodes, and including a top layer and a carrying layer, the carrying layer including a base layer and a transparent layer, the base layer including an upper surface and a lower surface opposite to each other, the upper surface of the base layer being in contact with a part of the top layer, and a part of the lower surface of the base layer being in contact with the transparent layer. This application has the characteristics of uniform light emission and good heat dissipation effect.

Abstract: The present invention relates to a red phosphor, a preparation method thereof and a light-emitting device prepared therefrom. A particle of the red phosphor consists of a phosphor inner core having a chemical formula of Ax1Gez1F6:y1Mn4+ and an outer shell having a chemical formula of Bx2Mz2F6:y2Mn4+, wherein 1.596?x1?2.2, 1.6?x2?2.2, 0.001?y1?0.2, 0?y2?0.2, 0.9?z1?1.1, and 0.9?z2?1.1; A and B are independently selected from alkali metal elements; and M is Si, or Si and Ge. The red phosphor provided by the present invention has high luminous efficiency and stability. Moreover, the phosphor alone or in combination with other luminescent materials can be used for preparing a light-emitting device with high performance.

Abstract: A light emitting device includes a light emitting element having a dominant wavelength in a range of 400 nm or more and 500 nm or less, and a wavelength conversion member that is arranged on a light emitting side of the light emitting element and includes a rare earth aluminate fluorescent material having a composition represented by the following formula (I), wherein the light emitting device emits light having a dominant wavelength in a range of 475 nm or more and 500 nm or less, and wherein the light emitting device emits light having an S/P ratio of 6.5 or less derived from the formula (1), which is the ratio of a luminous flux in scotopic vision relative to a luminous flux in photopic vision: (Lu1-p-nLnpCen)3(Al1-mGam)5kO12??(I) wherein in the formula (I), Ln represents at least one rare earth element selected from the group consisting of Y, La, Gd, and Tb, and the parameters k, m, n, and p satisfy 0.95?k?1.05, 0.05?m?0.70, 0.002?n?0.050, and 0?p?0.30, respectively.

Abstract: A reflector includes a reflector body that reflects light emitted from a light source and a phosphor layer that is provided on the reflector body and includes a phosphor excited by the light emitted from the light source.