Abstract: A lamp having improved color quality scale is provided. The lamp has a light-transmissive envelope and a phosphor layer comprising a first phosphor and a second phosphor wherein the first phosphor has an emission band with a maximum between 590 nm and 640 nm and the second phosphor has an emission band with a maximum between 520 nm and 570 nm. The light generated by the phosphor layer, when the lamp is energized, has delta chroma values for all fifteen color samples of the color quality scale within select parameters. The delta chroma values are measured in the CIE LAB color space.

Abstract: A lamp having improved color quality scale is provided. The lamp has a light-transmissive envelope and a phosphor layer comprising a first phosphor and a second phosphor wherein the first phosphor has an emission band with a maximum between 590 nm and 670 nm and the second phosphor has an emission band with a maximum between 520 nm and 570 nm. The light generated by the phosphor layer, when the lamp is energized, has delta chroma values for fifteen color samples of the color quality scale within select parameters. The delta chroma values are measured in the CIE LAB color space.

Abstract: A cold cathode fluorescent lamp includes a glass bulb (16), a protective film (22) formed on an inner face of the glass bulb, and a phosphor layer (24) that overlaps the protective film and that contains blue phosphor particles (26B), green phosphor particles (26) and red phosphor particles (26). The glass bulb has been formed from soda glass, and the blue phosphor particles have been coated with a metal oxide (30). Also, the protective film is made of silica (SiO2). Since the protective film has been provided in the fluorescent lamp and since the blue phosphor particles, which readily deteriorate, have been coated with the metal oxide, a good luminance maintenance rate is obtained. In addition, although the glass bulb of the fluorescent lamp is made of soda glass, since the protective film is made of silica, the fluorescent lamp obtains an initial luminance equivalent to the initial luminance of a fluorescent lamp whose glass bulb is made of borosilicate glass.

Abstract: To provide a light emitting device having a phosphor mixture and a light emitting part, the phosphor mixture including a red phosphor and more than one kind of phosphor having an emission spectrum with a peak in a wavelength range from 500 nm to 630 nm, and emitting light having a sufficient luminance and excellent in color rendering properties not only in a white light with high correlated color temperature, but also in a warm white light with low correlated color temperature. CaAlSiN3:Eu manufactured as a red phosphor and and CaAl2Si4N8:Eu manufactured as an orange phosphor, and for example, commercial YAG:Ce as a yellow-green phosphor, are prepared, and emission spectra of these phosphors are measured when excited by excitation light in the wavelength range from 430 nm to 500 nm.

Abstract: Provided is a silicophosphate-based phosphor of Formula 1 and a light-emitting device including the same: [(Sr(1-x-y-a-b-c) BaaCabMgcEuxMny)4Si(PO4)4??(1) where 0<x?0.2, 0?y?0.2, 0?a?0.2, 0?b?0.5, and 0?c?0.5. The silicophosphate-based phosphor of Formula 1 is chemically and thermally stable and can be easily prepared. The phosphor exhibits a high luminous property when excited by a UV LED excitation light source having a wavelength of 360-420 nm, and emits light having a wavelength of 570 to 630 nm. Accordingly, the silicophosphate-based phosphor can be used in a LED, a lamp, a self-emission type liquid crystal display device, or the like. In particular, when a white LED includes the silicophosphate-based phosphor, the color rendering index of the white LED is high and thus an excellent color rendering property can be obtained.

Abstract: A fluorescent material includes first and second phosphors. The first phosphor is a light-storing phosphor, which is represented by the general formula (M1-a-bEuaQb)Al2O4, wherein M is one type selected from the group consisting of Mg, Ca, Ba, Sr and Zn; Q is one type selected from the group consisting of Pr, Nd, Dy, Er and Ho; a is a number that satisfies 0.0001?a?0.5; and b is a number that satisfies 0.010?b?0.5. When the fluorescent material is excited for about 15 minutes by ultraviolet irradiation having about 365.0 nm wavelength with an intensity of 0.5 mW/cm2, and the color of the afterglow of the fluorescent material is measured 1 minute and 10 minutes after excitation is terminated, an amount of change between chromaticity measured 1 minute after excitation and that measured 10 minutes is in the range of ?0.001?x?0.009 and ?0.009?y?0.006.

Abstract: An external electrode fluorescent lamp includes a ferroelectric glass tube filled with discharge gas, and a ferroelectric film on an internal surface of the ferroelectric glass tube.

Abstract: A light-emitting device (2) including a light-emitting element (2a), a first phosphor (2b), and a second phosphor (2c). The light-emitting element (2a) emits light L1 having a wavelength range within the visible region. Upon receipt of the light L1, or light L3 originating from the second phosphor (2c), the first phosphor (2b) emits light L2 having a wavelength range, which differs from that of the first light L1 and the third light L3, but falls within the visible region. Upon receipt of a specific wavelength component (ultraviolet light, or the like) included in external light, the second phosphor (2c) generates the light L3 whose wavelength range is substantially the same as that of the light L1, thereby radiating the first phosphor (2b) with the light L3.

Abstract: A light-emitting device is provided, which includes a package having a first portion and a second portion surrounding it, a semiconductor light-emitting element mounted on the first portion and emitting a light having an emission peak in a near-ultraviolet region, a transparent resin layer covering the semiconductor light-emitting element and contacted with the package, and a laminated body formed on the transparent resin layer with end faces of the laminated body being contacted with the second portion. The transparent resin layer has an arch-like outer profile perpendicular cross section. The laminated body has an arch-like outer profile in perpendicular cross section and comprises a red fluorescent layer, a yellow fluorescent layer, a green fluorescent layer and a blue fluorescent layer laminated in the mentioned order. The yellow fluorescent layer has a top portion which is made larger in thickness than that of the end face portions thereof.

Abstract: An object of the present invention to provide a fluorescent lamp in which after formation of a phosphor layer, a glass bulb is bent and in which the phosphor layer is not subject to cracking or peel-off even in bent parts with a small radius of curvature, thus offering a good appearance. A fluorescent lamp includes a glass bulb 1 having bent parts, a protective film 2 having a fine grain layer 2a comprising fine grains of average grain size at most 100 nm and attached to an inner surface of the glass bulb, and large-sized grains some of which are buried in the fine grain layer 2a, the other large-sized grains projecting from the fine grain layer 2a, a phosphor layer 3 formed on the protective film 2 of the glass bulb 1, discharge inducing means 4, 4 sealably installed in opposite ends of the glass bulb 1, and a discharge medium sealed in the glass bulb 1.

Abstract: An apparatus for selectively producing one or more of a plurality of wavelength distributions of radiation. The apparatus comprises a primary UV radiation source and one or more wavelength transforming materials separated from the primary UV radiation source, that in response to irradiation by the primary UV radiation source, produce transformed radiation having a wavelength distribution that is different from the wavelength distribution of the primary UV radiation source. None, one, or more than one of the various WT materials can be selected by the apparatus, to allow the primary UV radiation, any individual transformed radiation, or any combination of the various radiations to be to be emitted from the apparatus.

Abstract: To provide a phosphor mixture realizing a light emitting device having a phosphor and a light emission element, by which light emission is performed, with a small color shift due to a feeding current and having an excellent color rendering properties. CaAlSin3:Eu as a red phosphor and YAG:Ce as a yellow phosphor are manufactured, and emission spectra thereof are obtained. Meanwhile, the emission spectrum of an excitation light emitted by a light emitting part is obtained. From the emission spectra thus obtained, a relative mixing ratio of each phosphor is obtained by simulation, so that a correlated color temperature of the light emitting device becomes a target temperature. Then, based on the relative mixing ratio thus obtained, each phosphor is measured and mixed, and a phosphor mixture is thereby obtained.

Abstract: Emergency lighting for an aircraft employs a photoluminescent substrate that is activated by exposure to light wherein the substrate has portions with different light emitting characteristics whereby, in the absence of activating light, a first substrate portion provides a higher light output than a second substrate portion for an initial period after which the second substrate portion provides a higher light output than the first substrate portion.

Abstract: A low-pressure mercury vapor discharge lamp has a light-transmitting discharge vessel (10) enclosing, in a gastight manner, a discharge space (13) provided with a filling of mercury and a rare gas. The discharge vessel comprises discharge means for maintaining a discharge in the discharge space. The discharge vessel is provided with a luminescent layer (17) comprising a mixture of at least a red and a green luminescent material. The red luminescent material comprises (Y,Gd)2O3:Eu. The green luminescent material comprises (Ba,Ca,Sr)2SiO4:Eu and/or (Sr,Ca,Ba,Mg,Zn)Si2N2O2:Eu. Particles of the green luminescent material are surrounded by a coating of aluminum oxide. Preferably, at least 50% of the particles of the green and red luminescent materials have an average diameter greater than or equal to approximately 5 ?m. The mixture of the red and green luminescent materials render a low-pressure mercury-vapor discharge lamp with an improved lumen equivalent.

Abstract: A lighting apparatus for emitting white light including a semiconductor light source emitting radiation with a peak at from about 250 nm to about 500 nm; a first phosphor having a peak emission between about 450 and 550 nm; and a second phosphor having a peak emission between about 615 and 670 nm; wherein the overall emission spectrum of the lighting apparatus has a depression between about 550 and 615 nm, said depression extending to between about 5% and 25% of the highest intensity of the emission spectrum of the lighting apparatus in the region from 400 to 700 nm. In this apparatus, the red-green color contrast is increased versus the referent illuminant.

Abstract: A phosphor, comprising a europium activated alkaline earth metal aluminate phosphor, wherein an atomic composition ratio thereof measured by an XPS is the same as an atomic composition ratio measured by a mass analysis method. A method for preparing the above phosphor comprising burning raw materials for the phosphor by heating in a heating furnace while flowing or rotating them to form a europium activated alkaline earth metal aluminate phosphor having an atomic composition ratio thereof measured by the XPS being the same as an atomic composition ratio measured by the mass analysis method. A luminescence of high luminance can be obtained by excitation with a vacuum ultraviolet ray, and a blue phosphor having a decrease in luminance thereof due to a heating process or the like reduced is realized.

Abstract: Phosphor compositions having the formula LlMmAaGgPpQqNnZz:Ce3+, where L is at least one of Li, Na, K, Rb, and/or Cs; M is at least one of Be, Mg, Ca, Sr, Ba, Mn, Sn, Pb, and/or Zn; A is at least one of Bi, Sb, In, Sc, Y, and/or any of the rare earth elements; G is Si and/or Ge; Q is at least one of O, S, and/or Se; Z is at least one of F, Cl, Br, and/or I; and wherein 0?l?1, 2.5?m?5, 1.5?a?2.5, 2?g?2.5, 0?p?1, 0?n?1, 0?z?1, and l+2m+3a+4g+5p=2q+3n+z; and light emitting devices including a light source and the above phosphor. Also disclosed are blends of LlMmAaGgPpQqNnZz:Ce3+ and one or more additional phosphors and light emitting devices incorporating the same.

Abstract: A green emitting phosphor of the following composition: Sr1-xBaxGa2S4:yEu2+, where 0.01?x?0.9 and 0.01?y?0.1. The green emitting phosphor can be applied to a light emitting device due to having light emitting peaks at a short wavelength of 522 to 535 nm and improved color coordinate characteristics.

Abstract: A color display device (10) includes: a plurality of gas discharge tubes disposed side by side, the gas discharge tubes having phosphor layers (4R, 4G, 4B) of different materials for respective colors disposed therein and containing discharge gas therein, the gas discharge tubes each having a plurality of light-emitting points disposed along the length thereof; a plurality of display electrodes disposed on display-side surfaces of the gas discharge tubes; and a plurality of signal electrodes (3) disposed on the rear sides of the respective gas discharge tubes. The discharge gas in each of the plurality of gas discharge tubes comprises a mixture of a plurality of different gases. The gas discharge tubes including respective different materials for the phosphor layers have respective different compositions of the plurality of different gases. Each composition of the plurality of different gases has such respective partial pressure ratios as to raise a color temperature.

Abstract: There are provided a phosphor which is a divalent europium-activated oxynitride phosphor substantially represented by General formula (A): EuaSibAlcOdNe, a divalent europium-activated oxynitride phosphor substantially represented by General formula (B): MIfEugSihAlkOmNn or a divalent europium-activated nitride phosphor substantially represented by General formula (C): (MIIl-pEup)MIIISiN3, having a reflectance of light emission in a longer wavelength region of visible light than a peak wavelength of 95% or larger, and a method of producing such phosphor; a nitride phosphor and an oxynitride phosphor which emit light efficiently and stably by the light having a wavelength ranging from 430 to 480 nm from a semiconductor light emitting device by means of a light emitting apparatus using such phosphor, and a producing method of such phosphor; and a light emitting apparatus having stable characteristics and realizing high efficiency.

Abstract: UV lamp for treatment of the skin, which lamp has a radiation capacity substantially entirely in the UV spectrum and in the red-light spectrum, wherein the radiation capacity of the lamp in the red light spectrum between 600 nm and 700 nm is at least 3% of the radiation capacity in the UV spectrum. In a first embodiment the lamp is a UV fluorescent lamp, having a first UV emitting phosphor and a second red light emitting phosphor, wherein the red light emitting phosphor is CeGdMgB5O10:Tb,Mn. In a second embodiment the lamp is a UV HID lamp, wherein the bulb of the lamp contains LiI and/or CaI2 as a red light radiation salt.

Abstract: A light emitting device is provided that has a semiconductor light emitting element and a phosphor which converts a part of the luminescence spectrum emitted from the semiconductor light emitting element. The luminescence spectrum of the semiconductor light emitting element is located between a near ultraviolet region and a short-wavelength visible region, and the phosphor is made by adding a red luminescent activator to a base material of a blue luminescent phosphor. Thereby, improving the color shading generated by the dispersion of the spectra of the light emitting elements and obtaining the light emitting device having a high brightness and a good color rendering properties. With the light emitting device, it is possible to provide the light sources for the lighting apparatus of medical treatments, the flash plate of a copying machine, etc., in which a good color rendering property is required.

Abstract: A plasma display panel and a method for manufacturing the same are disclosed. The plasma display panel includes a first substrate comprising first electrodes, a second substrate arranged to face the first substrate, the second substrate comprising second electrodes, barrier ribs formed between the first and second substrates, to define discharge cells, and a phosphor layer formed in each of the discharge cells. The phosphor layer includes a phosphor and a dielectric having a secondary electron emission coefficient higher than the phosphor.

Abstract: To provide a lighting device capable of a substantial color adjustment and unlimited control of spectral components, a lighting device of the present invention puts a first transparent plate in which a phosphor layer dispersed with a first phosphor is formed in places and a second transparent plate in which a phosphor layer dispersed with a second phosphor is formed in places in a path of light from a light source, and stacks the first transparent plate and the second transparent plate on top of each other. The second phosphor differs from the first phosphor. How much in terms of area the phosphor layers overlap with each other is made variable, and the color tone of the lighting device can thus be controlled. The lighting device uses a blue light source as its light source, a green phosphor as the first phosphor, and a red phosphor as the second phosphor.

Abstract: The invention relates to a fluorescent lamp, preferably a low pressure mercury discharge lamp for stimulating previtamin D3 production. The lamp has a discharge tube with a discharge gas filling. The inside wall of the discharge tube is covered with a phosphor coating for converting short wave UV radiation of the ionized discharge gas into longer wave UV radiation. The discharge tube is closed at both ends and provided with electrodes which are held and lead through a base cap at both ends. The base caps of the lamp are provided with contact pins for connecting the lamp to an electrical power supply. According to the improvement of the invention the UV light radiating coating of the discharge tube comprises a first phosphor for emitting light waves in the UVB spectrum and a second phosphor for emitting light waves in the visible light spectrum and for suppressing the emitted light in the UVB spectrum.

Abstract: A PDP includes first and second substrates, a plurality of electrodes between the first and second substrates, a plurality of barrier ribs between the first and second substrates to define discharge cells, at least one dielectric layer on the electrodes, a protective layer on the dielectric layer, a discharge gas in the discharge cells, and a plurality of photoluminescent layers in the discharge cells, the photoluminescent layers including at least one red photoluminescent layer in a corresponding discharge cell, the red photoluminescent layer including at least one inorganic pigment, and exhibiting a substantially lower decrease in a light emitting peak at about 570 nm to about 600 nm than at about 610 to about 630 nm, as compared to a comparable photoluminescent layer including no inorganic pigment.

Abstract: The invention relates to a low-pressure mercury discharge lamp comprising an envelope with an inner surface enclosing a discharge space in which a mercury comprising filling is accommodated, at least one electrode for generating ultraviolet radiation in said discharge space, and a phosphor layer formed over said inner surface to convert said ultraviolet radiation into light of the green wavelength region, wherein said phosphor layer consists of a water-dispersable blend of a yellow-green phosphor and a blue-green phosphor. The blend consists preferably of the CBT and BAM-green phosphors.

Abstract: A PDP constructed out of one or more Plasma-shells with a luminescent substance(s) located in close proximity to each Plasma-shell. The luminescent substance comprises a combination of an organic luminescent substance and an inorganic luminescent substance. The combination may be a mixture of organic and inorganic substances. Layers of organic and inorganic substances may be used. Each Plasma-shell is a hollow geometric body filled with an ionizable gas at a suitable pressure. Photons from the gas discharge inside the Plasma-shell excite the luminescent substance. In one embodiment the luminescent substance is located on the external surface of the Plasma-shell. In another embodiment, the luminescent substance is located inside the Plasma-shell. Plasma-shell includes Plasma-sphere, Plasma-disc, and Plasma-dome. The Plasma-shell may be used in combination with a Plasma-tube.

Abstract: A method of making a light source includes the steps of forming a first optical component having a phosphor material in fixed relation to a first multilayer interference reflector, providing a second optical component having an LED capable of emitting light that excites the phosphor material, and positioning the first optical component to receive emitted light from the second optical component. Corresponding articles are also disclosed.

Abstract: A low iron soda glass is combined with a UVA phosphor to provide increased uvb transmission from a florescent lamp which may be used as a tanning lamp.

Abstract: Provided is a plasma display panel that improves a black area ratio and a bright room contrast. The plasma display panel includes: front and rear substrates facing each other; barrier ribs disposed between the front and rear substrates to define discharge cells; address electrodes which extend in a first direction on the rear substrate and correspond to the discharge cells; a plurality of phosphor layers disposed in the discharge cells, wherein at least one of the phosphor layers is colored with a first chromatic color; display electrodes which extend in a second direction crossing the first direction on the front substrate and correspond to the discharge cells; and a front dielectric layer which is disposed on the front substrate to cover the display electrodes. The front dielectric layer is colored with a second chromatic color. The barrier ribs may be colored with a third chromatic color.

Abstract: A phosphor layer having improved contrast and brightness characteristics and a display device including the same are provided. The phosphor layer is made out of an ultra-fine pigment, a dispersant, a phosphor, a photosensitizer and a binder. The phosphor has a uniform distribution along the thickness of the phosphor layer, and the pigment varies in content over the thickness of the phosphor layer. A method of forming the phosphor layer is based on existing phosphor layer processes and includes a reduced number of processing steps than a filter screen method, thereby markedly lowering the manufacturing costs. The phosphor layer can be used in a cathode ray tube, a plasma display panel, a field emission display, and an organic electroluminescent device.

Abstract: A coated luminescent material having a luminescent material powder formed by grains, the luminescent grains being coated, and the coating being at most 5 nm, preferably at most 2 nm.

Abstract: There is disclosed a green phosphor that is adaptive for improving its driving voltage and brightness characteristic, and at the same time, improving its color purity. A green phosphor according to an embodiment of the present invention includes a mixed phosphor composed of a first class phosphor of Zn2SiO4:Mn, a second class phosphor of at least one of LaPO4:Tb, Y3Al3(BO3)4Tb, Y(Al, Ga)5012:Tb, YBO3:Tb, (Y, Gd)BO3:Tb, and a third class phosphor of at least one of BaAl12O19:Mn, BaAl14O23:Mn, Ba(Sr, Ma)AlO:Mn, and the mixing rate of the third class phosphor to the total weight of the mixed phosphor is 1˜25 wt %.

Abstract: The present invention provides a phosphor blend for wavelength conversion and a white light emitting device using the phosphor blend. Further disclosed is a white light emitting phosphor blend comprising 0.5˜18 wt % of A5(PO4)3Cl:Eu2+ (where A is at least one element selected from Sr, Ca, Ba and Mg), 0.7˜14 wt of D2SiO4:Eu (where D is at least one element selected from Ba, Sr and Ca), and 68˜98.5 wt % of G5EuS(WO4)2.5+1.5S:Sm (where G is at least one element selected from Li, Na and K; and s is a number between 1 and 5), based on the total weight of the phosphor blend.

Abstract: There is provided a blue-green illumination system, including a semiconductor light emitter, and a luminescent material, wherein the system has an emission with CIE color coordinates located within an area of a of a pentagon on a CIE chromaticity diagram, whose corners have the following CIE color coordinates: i) x=0.0137 and y=0.4831; ii) x=0.2240 and y=0.3890; iii) x=0.2800 and y=0.4500; iv) x=0.2879 and y=0.5196; and v) x=0.0108 and y=0.7220. The luminescent material includes two or more phosphors. The illumination system may be used as the green light of a traffic light or an automotive display.

Abstract: A light emitting device has a light emitting element, and a phosphor layer of phosphor glass to generate fluorescence while being excited by light emitted from the light emitting element. The light emitting element emits ultraviolet light, and the phosphor glass generates visible fluorescence while being excited by the ultraviolet light.

Abstract: A device for generating ultraviolet radiation by an excimer discharge is equipped with an at least partly UV-transparent discharge vessel whose discharge space is filled with a gas filling. The device includes electrodes for triggering and maintaining the excimer discharge in the discharge space. The device further has a coating that contains a phosphor including a host lattice and neodymium(III) as an activator.

Abstract: A phosphor in which water adsorption onto the surface of a blue phosphor is inhibited, luminance degradation and chromaticity shift of the phosphor is decreased, or discharge characteristics thereof is improved, and a plasma display device using the phosphor. In phosphor layers used for plasma display, selectively coating at least the vicinity of the sides of planes of mirror symmetry containing Ba atoms in a blue phosphor with an oxide or a fluorine-containing oxide inhibits water adsorption onto the surface of the blue phosphor, decreases luminance degradation and chromacity shift of a phosphor, or improves discharge characteristics thereof.

Abstract: A mercury vapor discharge fluorescent lamp is provided having a phosphor layer that has a yttria-based red emitting rare earth phosphor. The phosphor layer is prepared from an aqueous phosphor slurry that is coated onto the inner surface of the glass envelope of the lamp, then baked in a lehring oven to vaporize or decompose non-phosphor components of the slurry to leave behind the finished phosphor layer. The phosphor slurry contains a non-ionizing thickener, preferably polyethylene oxide, but does not contain any calcium carbonate or carbonate salts. The phosphor layer includes a yttria-based red emitting rare earth phosphor.

Abstract: A quantum-splitting fluoride-based phosphor comprises gadolinium, at least a first alkali metal, and a rare-earth metal activator. The phosphor is made in a solid-state method without using HF gas. The phosphor can be used alone or in conjunction with other phosphors in light sources and displays wherein it can be excited by VUV radiation, and increases the efficiency of these devices.

Abstract: To improve luminescence life, linearity of emission luminescence, and colority of an electron beam excitation display of thin flat type. The electron beam excitation display of thin flat type has a rear plate provided with a plurality of first electrodes in parallel with one another, a plurality of second electrodes in parallel with one another and orthogonal to the first electrodes, and electron emitters placed at points of intersection or near the points of intersection of the first electrodes and the second electrodes and a faceplate formed with a phosphor layer. By using a blue-emitting phosphor formed by mixing a blue-emitting phosphor ZnS:Ag and a blue-emitting phosphor CaMgSi2O6:Eu for the phosphor layer, the electron beam excitation display of thin flat type improved in luminescence life, linearity of emission luminescence, and colority that have been left unsolved is provided.

Abstract: A discharge lamp (1) having a discharge vessel (2) which surrounds a discharge medium which emits electromagnetic radiation in the VUV region when the lamp is operating has, on the inner side of the discharge vessel wall, a first phosphor layer, which faces the discharge medium and comprises a UVA component which can be excited by the VUV radiation and is intended to emit electromagnetic radiation in the UVA region. A second phosphor layer, which can be excited by the UVA radiation and is intended to emit electromagnetic radiation in the visible region either lies beneath the first phosphor layer or is applied to the outer side of the discharge vessel wall. This results in a lower color locus shift compared to a conventional phosphor mixture, which can be excited directly by VUV radiation.

Abstract: The invention relates to a fluorescent lamp for the illumination of plants, having a tubular discharge vessel, two electrodes which are fused in a gastight manner into the ends of the discharge vessel, a fill comprising at least a noble gas and mercury, and a phosphor coating on the inner wall of the vessel, the phosphor coating at least including a europium-doped barium magnesium aluminate phosphor of the BaMgAl10O17:Eu type and a cerium- and terbium-doped gadolinium zinc magnesium pentaborate phosphor of the Gd(Zn,Mg)B5O10:Ce,Mn type, and, to generate light with as high a light yield as possible and with a color temperature of between 4000 and 5500 K, the phosphor coating additionally includes an antimony- and manganese-doped calcium halophosphate phosphor of the Ca10(PO4)6(F,Cl)2:Sb,Mn type. This novel phosphor coating allows the light yield to be increased by 10% if the proportion by weight of the individual phosphors is optimized.

Abstract: In a wavelength converted semiconductor light emitting device with at least two wavelength converting materials, the wavelength converting materials in the device are arranged relative to the light emitting device and relative to each other to tailor interaction between the different wavelength converting materials in order to maximize one or more of the luminous equivalent, color rendering index, and color gamut of the combined visible light emitted by the device.

Abstract: A fluorescent lamp having phosphor blends to provide daylight (5500K) and tungsten (3200K) color when operated at higher current such as 250-1000 ma, to provide high light output such as for stage and studio applications.

Abstract: There is provided a fluorescent lamp having a construction where no difference is surely caused between a composition of the fluorescent particle mixture at one end portion of the glass tube and a composition of the fluorescent particle mixture at another end portion of the glass tube. The fluorescent lamp includes the glass tube and a fluorescent particle layer, formed on the inner surface of the glass tube, and including a fluorescent particle mixture of blue light emitting fluorescent particles having an average specific gravity of 4.0±0.4, red light emitting fluorescent particles having an average specific gravity of 4.0±0.4, and green light emitting fluorescent particles having an average specific gravity of 4.0±0.4, wherein the fluorescent particle mixture forming the fluorescent particle layer has a specific gravity of 4.0±0.4.

Abstract: A quantum-splitting phosphor has a formula of ADF5:Pr3+, wherein A is at least one alkaline-earth metal and D is at least one Group-IIIB metal. The phosphor is made in a solid-state method without using hazardous HF gas. The phosphor can be used alone or in conjunction with other phosphors in light sources and displays wherein it can be excited by VUV radiation, and increase the efficiency of these devices.

Abstract: In a fluorescent display device wherein light is emitted by impinging a low speed electron beam on a phosphor layer formed on an anode, the phosphor layer comprises a compound containing W and/or a compound containing P, K and/or Na. The compound containing P, K and/or Na may be a compound selected from the group consisting of K3PO4, P2O5 and Na2SiO3, the compound being added in an amount of 0.01 to 10.00 wt % to the phosphor layer, to provide a higher luminance residual ratio and a higher high temperature exposure characteristic than those of a convention fluorescent display device.

Abstract: A discharge lamp (1) having a discharge vessel (2) that surrounds a discharge medium that emits electromagnetic radiation in the VUV region during operation of the lamp, has on the inner side of the discharge vessel wall a yellow phosphor layer facing the discharge medium, and a blue phosphor layer lying therebelow. By contrast with a conventional three-band phosphor mixture, a higher luminous flux and a smaller color locus displacement are thereby achieved.