Abstract: The invention relates to a discharge vessel of a quartz glass for discharge lamps with a diffusion barrier inner layer of silicon oxide, which as a single layer is applied and/or is generated on the inner surface as well as to a method for generating and/or applying such a diffusion barrier inner layer and to the use of such a discharge vessel.

Abstract: A plasma display panel including: a front substrate an opposing rear substrate; barrier ribs to form discharge cells between the front rear substrates; discharge electrodes disposed on the front substrate; address electrodes disposed on the rear substrate; and a phosphor layer disposed inside the discharge cells, covering the address electrodes. The phosphor layer includes a phosphor mixed with an intercalation agent having a smaller particle size than the phosphor.

Abstract: A display device (100) comprising a plurality of lighting units (101), each lighting unit comprising at least one light emitting diode (202) being provided with a fluorescent element (203) arranged to absorb at least part of the light emitted by said light emitting diode and emit light of a wavelength range different from that of the absorbed light is provided. The fluorescent element (203) comprises at least one phosphor being an europium(II)-activated halogeno-oxonitridosilicate of the general formula EaxSiyN2/3x+4/3y:EuzOaXb.

Abstract: A plasma display panel (PDP) includes: a front substrate facing a rear substrate; first and second discharge enhancement layers disposed between the front and rear substrates and arranged on both sides of a main discharge space; first and second barrier ribs respectively formed on the first and second discharge enhancement layers and defining first and second asymmetric stepped spaces along with the first and second discharge enhancement layers; a scan electrode and a common electrode inducing a mutual discharge in the main discharge space; an address electrode generating an address discharge along with the scan electrode and extending in a direction to intersect the scan electrode; a phosphor layer formed in at least the main discharge space; and a discharge gas filled in the main discharge space and the first and second stepped spaces. Accordingly, the PDP having high efficiency may operate with low power and obtain high luminous brightness.

Abstract: This invention relates to a light emitting device based on a Xe or Xe/Ne excimer discharge, e.g. a full color display screen or a xenon excimer lamp, comprising a phosphor blend of a red-emitting Eu(III)-activated phosphor and an UVlight emitting phosphor. Full color plasma display panels (PDPs) according to the present invention comprising a phosphor blend of a red-emitting Eu(III)-activated phosphor and an UV-light emitting phosphor for the red pixels show an improved color point and a shorter decay time compared to the use of the respective single red emitting Eu(III) activated phosphor. Xenon excimer lamps for illumination purposes (e.g. for LCD backlighting or X-Ray image illumination) comprising a phosphor blend of a redemitting Eu(III) activated phosphor and an UV-light emitting phosphor show an improved color rendering. The invention is also related to a phosphor blend of a red-emitting Eu(III)-activated phosphor and an UV-light emitting phosphor.

Abstract: A plasma display panel enhancing an emission efficiency of a green phosphor layer by increasing an excitation efficiency of a green phosphor layer using visible light emitted from a dielectric layer or barrier ribs, the plasma display panel including a first substrate and a second substrate disposed to face the first substrate. A plurality of display electrodes are formed on the first substrate. A first dielectric layer is formed on the first substrate to cover the display electrodes. A plurality of address electrodes are formed on the second substrate in a direction crossing the display electrodes. A second dielectric layer is formed on the second substrate to cover the address electrodes. Barrier ribs are disposed in a space between the first dielectric layer and the second dielectric layer to form a plurality of discharge cells. The second dielectric layer and the barrier ribs comprise a short wavelength phosphor material.

Abstract: A light illuminating element including a transparent closed casing, an exciting gas, a first exciting coating, and a first dielectric multi-layer long-pass filter is provided. The transparent closed casing has a first inner side, a second inner side, a first outer side corresponding to the first inner side, and a second outer side corresponding to the second inner side. The exciting gas is disposed inside the transparent closed casing, and suitable for providing an ultraviolet light. The first exciting coating is disposed on the first inner side or the first outer side, and is suitable for absorbing the ultraviolet light to provide a visible light. The first dielectric multi-layer long-pass filter is disposed on the second inner side or the second outer side, and suitable for reflecting the ultraviolet light and allowing the visible light to pass through.

Abstract: A plasma display panel (PDP) is disclosed. In one embodiment, the PDP includes i) a front substrate and a rear substrate spaced apart from and facing each other and ii) a barrier rib portion dividing a space between the front substrate and the rear substrate into a plurality of discharge cells, wherein the barrier rib portion comprises first barrier ribs and second barrier ribs formed on the first barrier ribs, wherein the second barrier ribs are less in width than the first barrier ribs, wherein the widths of the first and second barrier ribs are defined along a first direction substantially parallel with one of the front and rear substrates, and wherein the second barrier ribs are closer to the first substrate than the first barrier ribs.

Abstract: A gas discharge tube includes: a elongated tube within which an electron-emissive film is formed, and which is filled with a discharge gas and sealed; a plurality of pairs of display electrodes disposed on a display side of the elongated tube; a signal electrode disposed on a rear side of the elongated tube; and an elongated support member inserted into the elongated tube and extending in the length direction of the elongated tube. The support member has a curved shape so that a curved inner surface thereof forms a discharge space, has longitudinally extending opposite edges, and has a phosphor layer formed on the inner surface of the support member. The support member further has an end wall at each of longitudinally opposite ends thereof. The end walls and the curved inner surface form an elongated depression in the support member.

Abstract: A ceramic body is disposed in a path of light emitted by a light source. The light source may include a semiconductor structure comprising a light emitting region disposed between an n-type region and a p-type region. The ceramic body includes a plurality of first grains configured to absorb light emitted by the light source and emit light of a different wavelength, and a plurality of second grains. For example, the first grains may be grains of luminescent material and the second grains may be grains of a luminescent material host matrix without activating dopant.

Abstract: A lighting device comprising one or more solid state light emitters which emit near ultraviolet light and one or more lumiphors which emit light having a wavelength in the range of from 490 nm to 555 nm, which in the absence of other light would produce a mixture of light within an area defined by x, y coordinates (0.32, 0.40), (0.36, 0.48), (0.43, 0.45), (0.42, 0.42), and (0.36, 0.38). The lighting device may further comprise one or more 600 nm to 630 nm light emitters, and a mixture of light emitted from the lighting device may be within ten MacAdam ellipses of the blackbody locus. Also, packaged solid state light emitters and methods of lighting.

Abstract: A fluorescent lamp includes a tubular member or envelope having an arc generating and sustaining medium therein. An electrode is provided in each end of the tubular member and a phosphor coating is applied to the interior surface of the tubular member. A mercury dispenser is situated within the tubular member. The mercury dispenser includes a body composed of a material. The body is provided with a bore. A wire plated with a material capable of wetting mercury is provided in the bore. A quantity of mercury is deposited in the bore in contact with the wire.

Abstract: A plasma display panel including a front substrate and a rear substrate facing each other; a barrier wall interposed between the front substrate and the rear substrate, including base portions arranged on either side of a main discharge space and protruding portions protruding on the base portions, and defining stepped spaces on either side of the main discharge space; a scan and a sustain electrode pair including a pair of bus electrodes disposed in the main discharge space and a pair of transparent electrodes extending from the bus electrodes toward the stepped space; an address electrode that generates, together with the scan electrode, an address discharge and crossing the scan electrode; a phosphor layer formed across the main discharge space and the stepped spaces; and a discharge gas filled in the main discharge space and the stepped spaces.

Abstract: A display filter includes a base film disposed on a display panel. The base film includes a phototransmissive unit having a constant horizontal cross-sectional area, and a light absorbing unit which includes a light absorbing material and surrounds the phototransmissive unit. A plasma display panel (PDP) may include the display filter. The display filter may improve ambient contrast by increasing the transmittance of light emitted by a display panel and by blocking externally incident light.

Abstract: A low-pressure gas discharge lamp includes a gas discharge vessel having a gas filling with a discharge-maintaining composition. At least part of a wall of the discharge vessel is provided with a luminescent material including a first UV-B phosphor containing, in a host lattice, gadolinium(III) as an activator and praseodymium(III) as a sensitizer.

Abstract: The invention relates to a low-pressure gas-discharge lamp which, with its light in the red spectral region, influences the biological circadian rhythm by controlling melatonin secretion. The tubular glass discharge vessel, which can also be in the shape of a double helix, is filled with a noble gas or noble-gas mixture and mercury. Electrodes for the supply of energy are arranged at both ends of the discharge vessel. The discharge vessel is multicoated on the inside by phosphor layers applied one after the other. The first phosphor layer located on the glass surface consists of phosphor which is excited both by ultraviolet mercury radiation between 180 nm and 400 nm and also by the blue radiation between 400 nm and 490 nm emitted by the mercury discharge, and by the visible radiation emitted by the second or further phosphor layers between 400 nm and 550 nm, where visible light having emission maxima in the region between 500 nm and 650 nm is generated.

Abstract: A plasma display panel has a front substrate, a rear substrate, and a phosphor layer. The front substrate has a dielectric layer formed so as to cover a plurality of display electrodes disposed on a substrate, and a protective layer formed on the dielectric layer. The rear substrate is faced to the front substrate so as to form discharge space, has data electrodes in the direction intersecting with the display electrodes, and has barrier ribs for partitioning the discharge space. The phosphor layer is formed by applying phosphor ink that is made of a phosphor material and dispersant between the barrier ribs of the rear substrate. Nano-particles with a diameter of a range of 1 nm to 100 nm inclusive, or a solvent having an affinity for the dispersant of the phosphor ink is applied to the surfaces of the barrier ribs, and then the phosphor ink is applied to them, thereby forming the phosphor layer.

Abstract: A plasma display panel is disclosed. The plasma display panel includes a front substrate, a rear substrate positioned to be opposite to the front substrate, a barrier rib positioned between the front substrate and the rear substrate to partition a discharge cell, and a phosphor layer positioned in the discharge cell. The phosphor layer includes a phosphor material and an additive material. The phosphor layer includes a red phosphor layer emitting red light, a green phosphor layer emitting green light, and a blue phosphor layer emitting blue light. A thickness of the blue phosphor layer is larger than a thickness of the red phosphor layer.

Abstract: A plasma display panel according to the present invention includes a front panel including a first electrode, a second electrode, and an upper dielectric layer covering the first and second electrodes, and a rear panel including a lower dielectric layer covering a third electrode. An interval between the first electrode and the second electrode ranges from 0.4 to 0.95 times an interval between the upper dielectric layer and the lower dielectric layer.

Abstract: A light-emitting device (1) includes a substrate (10), a light-emitting element (12) that is mounted on the substrate (10) and includes a luminous region (12b) and a nonluminous region (12a), and a phosphor layer (13) that is formed to cover the light-emitting element (12). The thickness of the phosphor layer (13a) located on the nonluminous region (12a) is smaller than that of the phosphor layer (13b) located on the luminous region (12b). The light-emitting device (1) can suppress nonuniform luminescent color.

Abstract: A brightness improving structure of a light-emitting module with an optical film surface layer 12, wherein a light-emitting part 20 is provided inside a transparent envelop 10 and may emit ultraviolet or blue light, the said transparent envelop 10 has first wall and second wall, first inside wall 101 and second inside wall 103 are oppositely formed inside thereof, first outside wall 102 and second outside wall 104 are oppositely formed outside thereof. The first wall is partly or entirely provided with the optical film coating 12, the optical film coating 12 may at least reflect the ultraviolet or blue light exciting fluorescent/phosphorescent light, and may pass light rays comprising visible light. A visible light layer or both the visible light layer and a reflective layer are provided on the second wall, and the said light-emitting part 20 is placed at a setting location from the envelop 10.

Abstract: A magnetic energy lamp, the fluorescent of which is excited by the electromagnetic induction generated by a built-in magnetic energy generator for lighting, comprises a lamp body (101) in which at least one through or internal hole (104) is arranged, at least one magnetic energy generator (106) is disposed in the through or internal hole (104), and the magnetic energy generator (106) is coupled with a lamp driving pulse transformer or an inverting or alternating circuit comprising of a half-bridge or a full-bridge driving IC to generate electromagnetic coupling or electromagnetic induction. The vacuum cavity of the lamp, enclosed by the lamp body (101) and the through hole (104) at their two ends, is filled with the inert gas and coated with the rare earth phosphor.

Abstract: A light emitting apparatus includes a blue light emitting diode (LED), a first and second phosphor layers. The second phosphor layer is between the blue LED and the first phosphor layer. When a blue beam of a shorter wavelength excites the phosphor layers, the excitation efficiency of the first phosphor layer is greater than that of the second phosphor layer. When a blue beam of a longer wavelength excites the phosphor layers, the excitation efficiency of the first phosphor layer is less than that of the second phosphor layer. Moreover, the wavelength of the peak intensity of the light beam from the first phosphor layer is shorter than that of the second phosphor layer. And, the dividing value between the shorter wavelength and the longer wavelength is within the range from a first wavelength to a second wavelength.

Abstract: A method for producing a plasma display panel comprising a front panel wherein an electrode, a dielectric layer and a protective layer are formed on a substrate of the front panel, a formation of the dielectric layer comprising: (i) preparing a dielectric material comprising a glass component, an organic solvent and silica particles; (ii) supplying the dielectric material onto the substrate having the electrode thereon, and then allowing the organic solvent contained in the supplied dielectric material to evaporate to form a dielectric precursor layer therefrom; (iii) heating the dielectric precursor layer to form a first dielectric layer therefrom; and (iv) heating the surface of the first dielectric layer as a local heat treatment to form a second dielectric layer to a limited depth from the surface of the first dielectric layer.

Abstract: A plasma display panel is disclosed. The plasma display panel includes a front substrate, a rear substrate positioned opposite the front substrate, and a barrier rib that is positioned between the front substrate and the rear substrate to partition discharge cells. The barrier rib includes a transverse barrier rib and a longitudinal barrier rib crossing each other. Depressions are positioned to be spaced apart from each other at a barrier crossing of the transverse barrier rib and the longitudinal barrier rib.

Abstract: A light-emitting device according to the present invention includes: first insulators (4) arranged so as to face each other; an emitter (2) arranged between the first insulators; a second insulator (5) functioning as a base for the first insulators and the emitter; an electrode (6) arranged to face, or contact with, the first insulators partially; another electrode (10) contacting with the second insulator and interposing the second insulator between the electrode and itself; and a light-transmitting substrate (8) that faces the second insulator with the first insulators interposed somewhere and with the emitter interposed elsewhere.

Abstract: The illumination system makes simultaneous use of the color-mixing principle from blue, green and red (RGB mixing) and the principle of converting of a primary radiation emitted by an LED into light with a longer wavelength by a phosphor which absorbs this radiation, with at least two LEDs being used, of which a first LED emits primarily in the range from 340 to 470 nm (dominant wavelength) and a second LED emits in the red region at 600 to 700 nm (dominant wavelength), wherein the green component is produced by the primary radiation of the first LED being at least partially converted by a green-emitting phosphor, the green-emitting phosphor used being a phosphor from the class of the oxynitridosilicates, having a cation M and the empirical formula M(1?c)Si2O2N2:Dc, M comprising Sr as a constituent and D being doped with divalent europium, where M=Sr or M=Sr(1?x?y)BayCax with x+y<0.5 is used, the oxynitridosilicate completely or predominantly comprising the high-temperature-stable modification HT.

Abstract: A display device includes a plurality of gas discharge tubes sandwiched between a front support plate and a rear support plate. A plurality of signal electrodes are formed on the rear support plate to extend along the longitudinal direction of the gas discharge tubes. The signal electrodes are divided into a plurality of groups. The distance between adjacent ones of the signal electrodes in each group has a first distance. The distance between adjacent ones of the signal electrodes between adjacent groups has a second distance that is larger than the first distance. Thus, a space may be provided between the two adjacent gas discharge tubes of the respective adjacent groups.

Abstract: Disclosed is a plasma display panel wherein reduction of reflection and improvement in contrast and sharpness of image light can be attained at the same time. Specifically disclosed is a plasma display panel (10) comprising a front plate (200) and a back plate (100) arranged at a distance from each other, a partition wall (110) for dividing the discharge space formed between the front plate (200) and the back plate (100), a phosphor layer (130) formed within a discharge cell (120) defined by the partition wall (110), electrodes respectively arranged on the front plate (200) and the back plate (100) for producing a discharge within the discharge cell (120), and a front filter (300) arranged on the viewer side of the front plate (200). The front filter (300) has two resin layers (320, 330) having different refractive indexes on the viewer side, and the viewer side surface of the front filter (300) and the interface between the two resin layers (320, 330) respectively have fine recesses and projections.

Abstract: A back light unit for a liquid crystal display device for improving uniformity of the light and dispensing with optical sheets. The back light unit includes a light source having a holographic pattern formed on a surface thereof opposite the display device which is to display a picture, and a reflective plate under the light source.

Abstract: A low-wattage mercury vapor discharge fluorescent lamp is provided. The lamp has a discharge sustaining fill of mercury vapor and an inert gas having 1-100 mole % xenon, balance comprising a rare gas or rare gas mixture, such as krypton or argon. The fill gas has a total pressure of 0.5-4 torr, and the lamp being adapted to operate below 10 watts per foot of arc length.

Abstract: A plasma display panel including a front substrate and a back substrate facing each other across a discharge space, and a plurality of row electrode pairs and a plurality of column electrodes extending in a direction orthogonal to the row electrodes. The row electrodes and said column electrodes being provided between the front substrate and the back substrate and forming unit light emission areas at intersections with each other within the discharge space. A crystal having a volumetric particle-size distribution in which a ratio of a crystal having a particle size of 0.7 ?m or less is 25% or less, is provided in an area facing the discharge space between the front substrate and the back substrate.

Abstract: This invention provides a small form factor apparatus for selectively producing one or more of a plurality of wavelength distributions of radiation, comprising a UV Light Emitting Diode (LED) as the primary UV LED radiation source and one or more wavelength transforming (WT) materials separated from the primary UV LED radiation source, that in response to irradiation by the primary UV LED radiation source, produce transformed radiation having a wavelength distribution that is different from the wavelength distribution of the primary UV LED radiation source. None, one, or more than one of the various WT materials may be selected by the user, to allow either the primary UV radiation, or the transformed radiation, or both simultaneously, to be to be emitted from the apparatus in a preferred direction.

Abstract: The present invention provides a discharge tube for infrared communication interference suppression, a lighting device for liquid crystal display devices, and a liquid crystal display device, each capable of suppressing infrared communication interference. The present invention is a discharge tube for infrared communication interference suppression, including a pair of electrodes, wherein the discharge tube contains mercury, argon gas, and rare gas thereinside, the rare gas having an excitation energy lower than that of argon gas. Krypton gas is mentioned as the rare gas. The discharge tube may further contain neon gas thereinside.

Abstract: A plasma display panel in which projections are formed in grooves between partitions and phosphor layers are provided on the projections so as to increase the area where phosphor adheres and thereby to increase the luminance. A couple of substrates are opposed to each other to form a discharge space. Band-like partitions partitioning the discharge space are arranged on the back or front substrate. Wall-like projections lower than the partitions and high enough to increase the area where phosphor layers are formed are provided in the region where the discharge space is formed in the long grooves between the partitions or around the discharge space. Phosphor layers are formed in the grooves between the partitions including the wall-like projections. A method for producing such a plasma display panel is also disclosed.

Abstract: A high-pressure discharge lamp may include at least one discharge vessel; and two electrodes, which extend into a discharge space of the discharge vessel and between which a light-emitting discharge arc is formed during operation of the high-pressure discharge lamp, wherein a partial coating is applied to a circumferential surface of the lamp in the region of an end section, on the discharge space side, of at least one of the electrodes, said partial coating changing the luminance and color temperature of the emitted light.

Abstract: The present invention discloses a magnetic light, having a magnetic energy generator for supporting a light body penetrated through therein, the magnetic energy generator includes a pair of detachable magnetic members jointed together with a face to face manner, wherein each of the magnetic members has at least an indented groove define onto a facing side at an aligned position for supporting the light body, such that when such two magnetic members approach with each other, the correspondingly mated indented grooves will combine to clamp the light body therebetween and to form a magnetic air gap between two magnetic members for communicating separated the indented grooves, accordingly, an insulated bakelite frame provided onto the magnetic air gap for winding up an electromagnetic wire.

Abstract: In an LED array chip (2), LEDs (6) are connected together in series by a bridging wire (30) The LEDs (6) each have a semiconductor multilayer structure (8-18) including a light emitting layer (14) Here, the semiconductor multilayer structure (8-18) is epitaxially grown on a front surface of an SiC substrate (4) A phosphor film (48) covers the LEDs (6) Two power supply terminals (36 and 38), which are electrically independent from each other, are formed on a back surface of the SiC substrate (4) The power supply terminal (36) is connected to a cathode electrode (32) of an LED (6a) at a lower potential end by a bridging wire (40) and a plated-through hole (42) The power supply terminal (38) is connected to an anode electrode (34) of an LED (6d) at a higher potential end by a bridging wire (44) and a plated-through hole (46).

Abstract: First and second substrates are provided opposing one another. Address electrodes are formed on the second substrate. Barrier ribs are mounted between the first and second substrates defining discharge cells and non-discharge regions. Phosphor layers are formed within each of the discharge cells. Discharge sustain electrodes are formed on the first substrate. The non-discharge regions are formed in areas encompassed by discharge cell abscissas and ordinates passing through centers of the discharge cells. Further, the discharge cells are formed such that ends thereof increasingly decrease in width as a distance from centers of the discharge cells is increased. The discharge sustain electrodes include bus electrodes that extend perpendicular to the address electrodes and outside areas of the discharge cells but across areas of the non-discharge regions, and protrusion electrodes formed extending from each of the bus electrodes.

Abstract: A lighting device comprising two or more solid state light emitters which emit light in the range of 430 nm to 480 nm and one or more lumiphors which emit light in the range of 555 nm to 585 nm. Also, a lighting device comprising two or more solid state light emitters. The lighting devices make a mixture of light which in the absence of any other light would be within an area defined by coordinates (0.32, 0.40), (0.36, 0.48), (0.43, 0.45), (0.42, 0.42), and (0.36, 0.38). The lighting device may further comprise one or more 600 nm to 630 nm light emitters, and the lighting device may emit light within ten MacAdam ellipses of the blackbody locus. Also, packaged solid state light emitters and methods of lighting.

Abstract: Provided are a phosphor composition formed in a white discharge cell of a plasma display panel (PDP) and a PDP using the same. The PDP includes a first substrate and a second substrate facing the first substrate, a barrier rib disposed between the first substrate and second substrate to define a plurality of discharge cells, first discharge electrodes and second discharge electrodes disposed between the first substrate and the second substrate, and a phosphor composition. The discharge cells includes red discharge cells, green discharge cells, blue discharge cells, and white discharge cells, and the phosphor composition is formed in the white discharge cells. One of the red discharge cells, one of the green discharge cells, one of the blue discharge cells, and one of the white discharge cells form a pixel. The composition ratio of each of the phosphors to another is different from each other.

Abstract: A gas discharge light emitting panel is provided that prevents deterioration in display properties of the panel, which accompanies changes in light-emitting properties of phosphors. It includes a front panel and a rear panel that are disposed to oppose each other, with a discharge space being interposed therebetween, and a phosphor layer that is disposed above a principal surface located on the discharge space side of the rear panel and that emits light by being irradiated with ultraviolet rays generated in the discharge space. The phosphor layer contains first and second phosphors in which the changes in at least one property selected from luminance and chromaticity, which accompany driving of the panel, occur in the opposite directions to each other.

Abstract: A light-emitting device includes a light-emitting element for emitting primary light, and a wavelength conversion unit for absorbing part of the primary light and emitting secondary light having a wavelength longer than that of the primary light, wherein the wavelength conversion unit includes plural kinds of phosphors having light absorption characteristics different from each other, and then at least one kind of phosphor among the plural kinds of phosphors has an absorption characteristic that can absorb the secondary light emitted from at least another kind of phosphor among the plural kinds of phosphors.

Abstract: The present invention relates to a flat discharge lamp (1000) that transmits in the visible and/or UV comprising first and second dielectric walls (2, 3) that are facing each other, kept parallel and sealed at the periphery (8), that thus define an internal space (10) filled with a plasma gas and comprising a source of UV and/or visible light (6); and first and second electrodes (4, 5) in separate planes parallel to the first and second walls, the first electrode (4) being at a potential V0 higher than the potential V1 of the second electrode, and the first electrode being arranged in the internal space and closer to the first dielectric wall than the second electrode.

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: Disclosed is a PDP wherein a discharge space is formed by arranging a front plate (2) and a back plate as to face each other, and hermetically sealing around the front and back plates. The front plate (2) is obtained by forming at least a display electrode (6) and a dielectric layer (8) on a front glass substrate (3), and the back plate is obtained by forming an electrode, a partition wall and a phosphor layer on a substrate. The dielectric layer (8) is composed of a plurality of layers, namely a lower dielectric layer (8a) and an upper dielectric layer (8b), and the lower dielectric layer (8a) and the upper dielectric layer (8b) are made of the same material which contains CaO and BaO with the CaO content being more than the BaO content.

Abstract: A method of photodynamically diagnosing or treating a contoured surface includes topically applying 5-aminolevulinic acid to the contoured surface and irradiating the contoured surface with substantially uniform intensity visible light from a plurality of light sources generally conforming to the contoured surface. The plurality of light sources may comprise fluorescent tubes.

Abstract: A plasma display panel is provided. The plasma display panel includes a substrate and a phosphor layer. The phosphor layer has a red phosphor layer, a green phosphor layer and a blue phosphor layer. At least one of a start point of the red phosphor layer, a start point of the green phosphor layer and a start point of the blue phosphor layer is different from a start point of the remaining phosphor layer.

Abstract: An exemplary external electrode fluorescent lamp includes a tube filled with a discharge gas, and a first external electrode on an outer surface of the tube, the first external electrode having a line-like shape. Thus, the exemplary external electrode fluorescent lamp has a reduced non-fluorescent region and an enlarged fluorescent region.

Abstract: A plasma display panel (PDP) including first and second substrates arranged opposite to each other, a plurality of first electrodes between the first and second substrates, a dielectric layer disposed on the first substrate, a plurality of second electrodes disposed in a direction crossing the first electrodes, and red, green, and blue phosphor layers disposed between the first and second substrates, wherein the dielectric layer includes a lead-free glass and at least one of CoO, CuO, MnO2, Cr2O3, or Fe2O3 as a metal oxide additive.