Abstract: A gas discharge tube includes a thin tube having a discharge space therein and an electron emissive coating formed within the thin tube. The thin tube has a display surface on which a pair of display electrodes is adapted to be disposed, and has a rear surface on which a signal electrode is adapted to be disposed. A surface portion facing toward the display surface is formed within the thin tube at a location nearer to the display surface from the midway between the display and rear surfaces. An electron emissive coating is formed on the surface portion. Thus the gas discharge tube can reduce its firing voltage without lowering the light-emission efficiency.

Abstract: A white fluorescent lamp is prepared with a substrate and a high voltage circuit. The substrate has a fluorescent layer with silicon quantum dots. The lamp generates a white light by exciting the substrate with the circuit through a spark gap. A photoelectronic conversion is improved and a cost is lowered by using a cheap material as silicon.

Abstract: A plasma tube array according to the present invention includes plural light emitting tubes that have fluorescent material layers inside and are mutually lined up in parallel. The plasma tube array includes pairs of display electrodes that are formed along the respective fluorescent material layers. The fluorescent material layers are disposed in sequence in the longitudinal direction of the light emitting tubes.

Abstract: A plasma display panel operated at a high luminous efficiency even with a fine cell structure and its manufacturing method. An AC type PDP1 has a phosphor film 31 comprising a thinned crystal over the surface of a dielectric protecting film 14 in a front panel 10 The phosphor film 31 is a film formed by EB evaporation, the film thickness of which is set in a range where a sufficient luminous efficiency and a visible light penetration efficiency can be secured when the phosphor film 31 is irradiated with ultraviolet rays.

Abstract: The sensitivity of YPO4:Ce phosphors to 185 nm radiation may be increased by incorporating a praseodymium coactivator. The use of Ce and Pr as co-activators in a YPO4 phosphor improves the sensitivity of the phosphor to excitation by both 185 nm and 254 nm radiation and should increase total UVA and UVB output in fluorescent lamps. The co-activated phosphor has emission peaks at about 355 nm and about 335 nm.

Abstract: In a flat-type discharge lamp composed of a first dielectric plate integrally formed at its inner surface with a plurality of spaced dielectric ribs at the same height defined by a specified discharge distance, a second dielectric plate assembled in parallel with the first dielectric plate to form a sealed space to be filled with inert gas, and electrodes in the form of a thin membrane respectively deposited on the outer surfaces of the dielectric plates, wherein the electrodes are applied with a specified voltage to cause discharge in inert gas filled in spaces among the dielectric ribs within the sealed space thereby to produce visible light on a light emitting surface formed on at least one of the electrodes, the first dielectric plate is formed at its outer peripheral edge with an outer peripheral frame having a support surface of the same height as the dielectric ribs, the second dielectric plate being bonded by an adhesive coated in a recess formed along one side of the support surface and secured tight

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 plurality of different frequency absorbing materials are placed between an LED and a surface so as to generate a non-monochromatic colors. In one embodiment, a light device is arranged with light sources, each of which emit light of a different color, and by surrounding the different colored light sources with a color changing media, each of which absorb light of different colors and by allowing the light sources to be individually calibrated as to power level, a variety of colors can be achieved.

Abstract: A display apparatus includes a face plate that constitutes a part of a vacuum envelope, a phosphor layer formed on an inner surface of the face plate, and an electron beam source that emits electron beams to the phosphor layer. The face plate includes a light-emitting glass layer containing a light-emitting substance that emits light when electron beams are projected thereon. By extracting energy of electron beams, which have reached the face plate, as light, it is possible to reduce browning that occurs in the face plate and improve brightness of a display image significantly.

Abstract: Backlight modules. A backlight module for a flat display device includes a light guide element and a fluorescent lamp assembly. The fluorescent lamp assembly disposed on a first side of the light guide element includes a first fluorescent lamp and a second fluorescent lamp. The first fluorescent lamp comprises a first end, a second end and a first phosphor coating on an inner surface of the first fluorescent lamp, wherein the first phosphor near the first end is thicker than the second end. The second fluorescent lamp comprises a third end adjacent to the second end, a fourth end adjacent to the first end, and a second phosphor coating on an inner surface of the second fluorescent lamp, wherein the second phosphor near the third end is thicker than the fourth end.

Abstract: The present invention provides an oxynitride phosphor represented by a composition formula M(1)1?jM(2)jSibAlcOdNe (composition formula I) or a composition formula M(1)1?a?jM(2)jCeaSibAlcOdNe (composition formula II) and containing 50% or more of a JEM phase, and a light emitting device including a semiconductor light emitting element emitting an excited light, a first phosphor that is the oxynitride phosphor according to the present invention that absorbs the excited light and emits a fluorescence, and a kind or a plurality of kinds of second phosphor(s) that absorb(s) the excited light and emit(s) a fluorescence having a longer wavelength than the fluorescence emitted by the first phosphor. Thereby, a novel oxynitride phosphor being capable of highly efficiently emitting mainly a light having a wavelength of 510 nm or less and a light emitting device using the same can be provided.

Abstract: The invention provides a light bulb that glows in the dark after activation by incident electromagnetic radiation. The element that glows in the dark is an energy storage element and is placed in the center of the light bulb. Furthermore, a reflector is incorporated into the light bulb and/or energy storage element to effectively direct the electromagnet radiation emitted from the luminescent phosphor into an open space.

Abstract: A Plasma Display Panel (PDP) in which a dummy area is arranged so as to retain phosphor paste ejected from extra nozzles when a plurality of nozzles are used to apply phosphor paste.

Abstract: A planar light source device and a manufacturing method therefor are provided. The planar light source device includes a first substrate, a second substrate disposed under the first substrate and in parallel therewith at a specific distance therefrom and having a plurality of protrusions on an upper surface thereof or a plurality of recessions on a lower surface of the second substrate. The plurality of protrusions or recessions is formed by sandblasting or etching. Between the first and second substrates, a dielectric layer, a plurality of discharging spaces, a plurality of metal electrodes, a first phosphor layer, a second phosphor layer, a plurality of ribs and a reflective layer are provided and the reflective layer is formed on upper surfaces of the protrusions or lower surfaces of the recessions.

Abstract: A method for constructing a scotopic after-glow lamp for use in an electric lamp with the scotopic lamp having a lamp wall is provided. The method comprises combining scotopic enhanced phosphors with after-glow phosphors, and layering the combined phosphors on the lamp wall with at least a portion of the after-glow phosphors being against the lamp wall and at least a portion of the scotopic phosphors being exposed to the electric arc of the lamp.

Abstract: A phosphor blend for use with an indium halide discharge lamp and a lamp made therewith is described. The phosphor blend comprising at least two phosphors selected from Ca8Mg(SiO4)4Cl2:Eu, SrSi2N2O2:Eu and Ca2Si5N8:Eu: The blend may also include a blue-emitting phosphor such as BaMgAl10O17:Eu.

Abstract: A self-luminous base lamp material for use in construction of a flat flexible fluorescent lamp is disclosed. A layer of fluorescent particles is carried between a rear electrode and front conductor electrode arranged in a parallel plate or split-electrode operative configuration. The fluorescent particles emit light upon excitation by an ultraviolet light source carried between the electrodes in response to energy applied to the electrodes. Inert gas carried in a glass microsphere functions as the ultraviolet source in one embodiment.

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 tanning device is described by which the bluish light emitted by mercury vapor lamps is converted into yellow or white light. For this purpose, the mercury lamps, or the sheets of transparent plastics material covering these lamps, are doped or coated with one or more organic or inorganic fluorescent dyes that partially absorb the blue light emitted by the mercury lamps and convert it into light of wavelengths of 550 to 650 nm.

Abstract: A fluorescent lamp includes: a bulb including bent and straight-tube portions having an external tube diameter of 12 to 20 mm and a tube length of 800 to 2500 mm. The straight portions are disposed generally within the same plane through the bent portions. A pair of end portions with electrodes sealed therein form a single discharge path through the straight tube and bent portions. A phosphor layer is formed on the inner face of the bulb, and a discharge medium including mercury is sealed in the bulb. Thermal deterioration of the phosphor layer formed at the straight tube portions is reduced so deterioration of the initial light flux is suppressed, allowing lighting at higher efficiency. With the above configuration, a fluorescent lamp is compact and capable of light with high efficiency, and with improved light output properties. A light fixture uses this fluorescent lamp.

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 flat-type fluorescent lamp device includes a first substrate, a plurality of first and second electrodes arranged on the first substrate at fixed intervals, a first fluorescent layer on an entire surface of the first substrate including the first and second electrodes, a second substrate having a plurality of projection portions for maintaining a uniform gap between the first and second substrates, and a second fluorescent layer on the second substrate except at regions, of the projection portions that contact the first substrate.

Abstract: An illumination system for backlighting liquid crystal displays has a flat lamp, which has a front side provided for emitting the light and a rear side opposite the front side, a flat housing having a planar rear wall and four side walls, the flat lamp being arranged within the housing on the rear wall, and a frame that at least partially surrounds the side walls of the housing and extends at least up to the edge of the flat lamp.

Abstract: A light emitting device 10 includes: a lead frame 12a serving as a mounting portion having a cup 13; a light emitting element 14, mounted on the bottom face 13a of the cup, for emitting light having a predetermined peak wavelength; a layer of large phosphor particles 16, absorbed and formed on the light emitting element, for absorbing light emitted from the light emitting element and for emitting light having a longer peak wavelength than that of the light emitted from the light emitting element; small phosphor particles 18, which have a smaller particle diameter than that of the large phosphor particles, for absorbing at least one of light emitted from the large phosphor particles and light emitted from the light emitting element and for emitting light having a longer peak wavelength than that of the at least one of the light emitted from the large phosphor particles and the light emitted from the light emitting element; and a sealing member 20, in which the small phosphor particles are dispersed, for sealin

Abstract: A plasma display device provided with a green color phosphor which is charged entirely with a positive potential, adsorbs only limited amounts of water, carbon monoxide, carbon dioxide and hydrocarbon, and not liable to cause chemical reaction thereto. The green color phosphor used is a combination of any of phosphors defined by the general formula of MMg1-xAl11O19:Mnx (where “M” denotes one of La and Ce) having a magnetoplumbite crystal structure, yttrium borate group and yttrium aluminate group phosphors defined by the general formulae of (Y1-a-yGda) BO3:Tby, (Y1-a-yGda) (Ga1-xAlx)3(BO3)4:Tby, (Y1-a-yGda) (Ga1-xAlx)3(BO3)4:Cey, Tby, (Y1-y)3(Ga1-xAlx)5O12:Tby and La Mg1-xAl11O19:Cex, Tbx.

Abstract: In an LED (Light Emitting Diode) including a cover covering an LED element, the cover is formed using glass having a composition RnSiO2-n/2. The glass according to the present invention is low melting point glass with a softening temperature of ?40° C. to 300° C., melts at lower temperatures compared to conventional glass, and can safely form the cover without damaging the LED element. Since glass has better moisture shield performance and resistance to light compared to epoxy resins, the cover is formed using glass, and consequently deterioration of the LED element and a phosphor caused by moisture is reduced, deterioration of the cover caused by light is reduced, and changes in color and luminous intensity are restrained.

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: A silicate-based blue phosphor coated with (or containing) metal oxide, a phosphor paste composition including the silicate-based blue phosphor coated with metal oxide, and a flat display device including a phosphor layer including the silicate-based blue phosphor coated with metal oxide are disclosed. In one embodiment, the silicate-based blue phosphor coated with metal oxide has a positive (+) surface charge and provides excellent discharge properties without a deterioration of brightness.

Abstract: A photonic structure for “white” light generation by phosphors under the excitation of a LED. The photonic structure mounts the LED and an optically transparent nanocomposite matrix having dispersed therein phosphors which will emit light under the excitation of the radiation of the LED. The phosphors dispersed in the matrix may be nanocrystalline, or larger sized with the addition of non light emitting, non light scattering nanoparticles dispersed within the matrix material so as to match the index of refraction of the matrix material to that of the phosphors. The nanocomposite matrix material may be readily formed by molding and formed into a variety of shapes including lenses for focusing the emitted light. A large number of the photonic structures may be arranged on a substrate to provide even illumination or other purposes.

Abstract: A luminous display device is disclosed as including a transparent or translucent top body part having a rear surface; a bottom body part having a front side, a rear side, and a trough extending along at least part of the front side of the bottom body part to form a pre-defined pattern; in which the rear surface of the upper body part is in fused sealing relationship with the front side of the bottom body part to form a sealed discharge chamber between the trough and the upper body part; an ionizable gas filling the chamber; and two openings in the bottom body part each having a first end communicating with the chamber and a second end communicating with an electrode, the electrodes being energizable to ionize the gas in the chamber to produce light discharge of the pre-defined pattern.

Abstract: Provided are a borate chloride phosphor represented by Formula 1 below, a light-emitting diode (LED) including the same, a lamp, a self-emissive liquid crystal display device (LCD), and a plasma display device (PDP). (Ca(1?x?a?b?c)BaaSrbMgcEux)2B6O10.5Cl,Formula 1 where 0<x?0.2, 0?a?0.5, 0?b?0.95, 0?c?0.5. The borate chloride phosphor has good chemical properties and is thermally stable and easy to manufacture. The borate chloride phosphor exhibits high brightness due to a UV excitation light source in a wavelength of 280-410 nm, and emits blue light in a wavelength range of 425-455 nm. Accordingly, the borate chloride phosphor of the present invention can be applied to an LED, a lamp, a PDP, or a self-emissive LCD.

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 method of manufacturing an electron emission device includes the steps of (a) forming a cathode electrode on a substrate, (b) forming an emitter on the cathode electrode by patterning, (c) forming a photosensitive glass paste layer burying the emitter by coating and drying the photosensitive paste layer on the surface of the substrate fabrication in which the emitter is formed, and (d) forming a gate insulating layer by patterning the result of step (c) by exposing, developing and calcining the photosensitive glass paste layer. The number of steps of the method of manufacturing an electron emission device is reduced and the processes are simplified due to self-alignment, and thus the manufacturing cost is reduced. The electron emission device is used as an electron emission type backlight unit and/or in an electron emission display device.

Abstract: A flat fluorescent lamp includes a first substrate, a second substrate, a first exhausting pipe and a second exhausting pipe. The second substrate is combined with the first substrate and forms a plurality of discharge spaces. The first exhausting pipe is disposed at a first longitudinal end portion of the discharge spaces between the first and second substrates such that the first exhausting pipe crosses the discharge spaces. The first exhausting pipe has first exhausting holes. The second exhausting pipe is disposed at a second longitudinal end portion of the discharge spaces between the first and second substrates such that the second exhausting pipe crosses the discharge spaces. The second exhausting pipe has second exhausting holes.

Abstract: A slurry composition for forming a layer is provided. The slurry composition includes 100 parts by weight of a metal oxide selected from the group consisting of MgO, CaO, SrO, BaO, ZrO3, and a combination thereof; 1-200 parts by weight of a binding agent per 100 parts by weight of the metal oxide, the binding agent being selected from the group consisting of calcium phosphate (CaP), a calcium-barium-boron-based (CBB-based) oxide, a triple carbonate ((Ca, Ba, Sr)CO3), and a combination thereof; 1-10 parts by weight of a binder per 100 parts by weight of the metal oxide, the binder being selected from the group consisting of nitro cellulose, ethyl cellulose, methyl methacrylate, and a combination thereof; and 50-500 parts by weight of a solvent per 100 parts by weight of the metal oxide.

Abstract: A method of manufacturing a fluorescent lamp is provided. One of a dispersed metal oxide precursor sol prepared by a sol-gel reaction and a fluorescent substance slurry is coated on a glass tube having at least one open side and then the other of the fluorescent substance slurry and the dispersed metal oxide precursor sol is coated on the glass tube. Next, passivation and fluorescent layers are simultaneously formed by baking the coated layers. Then, air is exhausted out of the glass tube and a discharge gas is injected into the glass tube. Finally, the glass tube is sealed.

Abstract: A blue-emitting phosphor is optimized by controlling mole fractions typically of Mg and Si in Sr3-eMgbSi2cO8d:Eue or by further including an optimal amount of at least one additional component such as Ba or Ca. The resulting phosphor exhibits a higher brightness and a higher color purity upon excitation by ultraviolet light emitted as a result of discharge of xenon gas. The optimized phosphor is incorporated into light emitting devices such as lamps and PDPs, and further into display devices.

Abstract: A lighting device comprising first and second groups of solid state light emitters, which emit light having dominant wavelength in ranges of from 430 nm to 480 nm and from 600 nm to 630 nm, respectively, and a first group of lumiphors which emit light having dominant wavelength in the range of from 555 nm to 585 nm. If current is supplied to a power line, a combination of (1) light exiting the lighting device which was emitted by the first group of emitters, and (2) light exiting the lighting device which was emitted by the first group of lumiphors would, in an absence of any additional light, produce a sub-mixture of light having x, y color coordinates within an area on a 1931 CIE Chromaticity Diagram defined by points having coordinates (0.32, 0.40), (0.36, 0.48), (0.43, 0.45), (0.42, 0.42), (0.36, 0.38). Also provided is a method of lighting.

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 plasma display panel (PDP) has a structure which extends a discharge space, increases a visible light emission area, enables a low driving voltage, and improves light emission efficiency. The PDP comprises: a pair of substrates including a first substrate and a second substrate facing each other; a barrier rib located between the first substrate and the second substrate, and defining discharge, together with the first and second substrates, cells where gas discharge is generated; a plurality of discharge electrodes comprising first discharge electrodes and second discharge electrodes, surrounding the discharge cell vertically spaced in the barrier rib, for generating a gas discharge by mutual actions; and a first phosphor layer and a second phosphor layer located in the discharge cell formed in the first substrate and in the discharge cell formed in the second substrate, respectively.

Abstract: A green phosphor for a plasma display panel has improved color purity, improved lifespan, and improved discharge stability. The green phosphor comprises a core including at least one first phosphor material selected from the group consisting of Zn2SiO4:Mn, (Zn,A)2SiO4:Mn (A is an alkaline earth metal), (Ba,Sr,Mg)O.?Al2O3:Mn (? is an integer in a range of 1 to 23), and MgAlxOy:Mn (x is an integer in the range of 1 to 10, and y is an integer in a range of 1 to 30), and a coating layer including a second phosphor which is present on the surface of the first phosphor, and which is at least one selected from the group consisting of LaMgAlxOy:Tb:Tb (x is an integer in the range of 1 to 14, and y is an integer in the range of 8 to 47), ReBO3:Tb (Re is a rare earth element selected from the group consisting of Sc, Y, La, (Ce, and Gd), and (Y, Gd)BO3:Tb.

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.

Abstract: An electroluminescent (EL) lamp having at least two integral fusible links and a method of manufacturing such a lamp are disclosed. The present invention provides for a fusible link between the front electrode input power contact area and the transparent electrode. In addition, the present invention provides a second fusible link between the back electrode input power contact area and the transparent electrode. The fusible links are designed to become non-conductive (open) if a certain current level is exceeded. The EL lamp fails in a controlled way, without signs of combustion. The EL lamp is therefore protected from self-destruction when subject to an anomaly or manufacturing defect.

Abstract: An apparatus and method for photodynamic therapy or photodynamic diagnosis using an illuminator comprising a plurality of light sources generally conforming to a contoured surface and irradiating the contoured surface with substantially uniform intensity visible light. The light sources may comprise generally U-shaped fluorescent tubes that are driven by electronic ballasts. Adjustment of the ballast voltage controls the output power of the tubes. The tubes are supported by a sheet-metal or plastic housing and are covered by a polycarbonate shield which directs cooling airflow within the unit and prevents glass-patient contact in the event of tube breakage. An aluminum reflector located behind the tubes increases both the output irradiance and the uniformity of the output distribution. The spacing of the U-shaped tubes is varied to increase the output at the edges of the illuminator to make the output more uniform. Also, different portions of the tubes are cooled at different amounts, to improve uniformity.

Abstract: A flat-type fluorescent lamp device includes first and second substrates facing each other, a plurality of first electrodes on the first substrate disposed along a first direction, each first electrode having protrusions extending from both sides of the first electrode along the first direction, a plurality of second electrodes on the first substrate, the second electrodes each having concave portions that correspond to the protrusions of the first electrode and convex portions that correspond to regions between the protrusions of the first electrode, a first fluorescent layer on an entire surface of the first substrate including the first and second electrodes, and a second fluorescent layer on the second substrate.

Abstract: A plasma display device comprises blue phosphor which restricts adsorption of water and hydrocarbon gases to a surface thereof, reduces degradation of luminance and chromaticity change, and improves discharge characteristic. Among phosphor layers used for a plasma display, a blue phosphor layer comprises one of compounds symbolized by Ba1-xMgAl10O17:Eux and Ba1-x-ySryMgAl10O17:Eux, of which phosphor contains 0.2 to 0.8 in number x of Eu atoms, and the Eu atoms comprises 25% to 85% concentration of bivalent Eu ions, and 15% to 75% concentration of trivalent Eu ions.

Abstract: A plasma display panel includes a red phosphor layer, a green phosphor layer, and a blue phosphor layer. The thickness of the phosphor layer is satisfied by the following condition: when D is (S?2L)/S, D?0.64, S being a distance between barrier ribs at half the height of the barrier ribs, and L being a side thickness of the phosphor layer coated on the barrier ribs at half the height thereof.

Abstract: A plasma display device includes a blue phosphor composed of a compound represented by Me3MgSi2O8:Eu (where, Me is at least calcium (Ca), strontium (Sr), or barium (Ba)). Concentration of bivalent Eu ions is 45 to 95% and concentration of trivalent Eu ions is 5 to 55%, of the europium (Eu) atoms contained in the blue phosphor layer. The plasma display device has less luminance degradation in a panel manufacturing process, high luminance, and long lifetime.

Abstract: The present invention provides a green emitting yttrium silicate phosphor, which has an improved temperature characteristic and life, and a cathode-ray tube using it. A green emitting yttrium silicate phosphor according to the present invention comprises a composition having the general composition (Y, Sc, Tb)2SiO5, wherein the mole ratio of Sc to the entire rare-earth element in the phosphor is 0.045<Sc/(Y+Sc+Tb)<0.17. Adding the above concentration range of Sc improves its temperature characteristic and life. It is more preferable that the concentration range is 0.07<Sc/(Y+Sc+Tb)<0.13.