摘要:
Blue-emitting phosphors for use with plasma display panels (PDP) or other vacuum ultraviolet-excited (VUV) devices are provided. These blue-emitting phosphors and mixtures thereof include at least a europium-activated calcium-substituted barium hexa-aluminate (CBAL) phosphor. Preferably, the CBAL phosphor has a composition which may be represented by the formula: Ba1.29-x-yCaxEuyAl12O19.29, wherein 0
摘要:
A phosphor blend for an electroluminescent lamp is described that comprises a green-emitting electroluminescent phosphor and a red-emitting photoluminescent phosphor, the blend exhibiting an x color coordinate from 0.220 to 0.350 and a y color coordinate from 0.450 to 0.475 when stimulated by an electric field.
摘要:
A high brightness green-emitting phosphor is described. The phosphor has the general formula: (Y(1-x-y-z)GdxTbyLaz)BO3 where 0.01≦x≦0.4, 0.01≦y≦0.1, and 0
摘要:
A method for providing an adherent, continuous, conformal, non-particulate coating of a compound of a metal or metalloid on the surface of individual phosphor particles. The method involves wetting each of the individual particles with a polymer solution including a polymer in a solvent base, the polymer being capable of chelating ions of the metal or metalloid. The particles then are dried to produce a continuous coating of the polymer on each of the individual particles. The polymer-coated phosphor particles are suspended in a solution containing ions of the metal or metalloid and having a pH of at least 9 to produce chelation of the metal or metalloid ions by the polymer coating, to produce the adherent, continuous, conformal, non-particulate, metal- or metalloid-compound coating on the particle surfaces. Also described are a method for improving lumen maintenance of a lamp, a coated phosphor powder, and a phosphor-coating composition for coating an inner surface of a lamp envelope.
摘要:
An electroluminescent lamp having a high color rendering index (CRI) can be made using a phosphor blend comprising a mixture of an electroluminescent phosphor and an europium-activated alkaline earth silicon nitride phosphor, wherein the electroluminescent phosphor is selected from a blue-emitting electroluminescent phosphor, a blue-green-emitting electroluminescent phosphor, or a combination thereof. Preferably, the lamp exhibits a CRI of at least about 75, and, more preferably, at least about 80. A preferred blend contains from about 10% to about 20% by weight of the europium-activated alkaline earth silicon nitride phosphor.
摘要:
A phosphor blend for a compact fluorescent lamp is described wherein the phosphor blend comprises a green-emitting Tb3+ phosphor, a Y2O3:Eu3+ phosphor, a Sr6BP5O20:Eu2+ phosphor, a Mg4GeO5.5F:Mn4+ phosphor, and optionally a BaMgAl11O17:Eu2+ phosphor, wherein the blend contains from 1% to 20% by weight of the Sr6BP5O20:Eu2+hosphor and from 5% to 30% by weight of the Mg4GeO5.5F:Mn4+phosphor. A compact fluorescent lamp having a phosphor coating containing the phosphor blend produces a light that is perceived as more pleasing than the light produced by standard compact fluorescent lamps.
摘要翻译:描述了一种用于紧凑型荧光灯的荧光粉混合物,其中所述荧光体共混物包括发绿光的Tb 3+荧光体,Y 2 O 3:Eu 3+荧光体,Sr 6 BP 5 O 20:Eu 2+荧光体,Mg 4 Ge 5 O 5 5.F:Mn 4+荧光体和任选的BaMgAl 11 O 17:Eu 2+荧光体, 其中所述共混物含有1重量%至20重量%的Sr 6 BP 5 O 20:Eu 2+氧化物和5重量%至30重量%的Mg 4 Ge 5 O 5 5.F:Mn 4+磷光体。 具有包含荧光体共混物的荧光体涂层的紧凑型荧光灯产生被认为比由标准紧凑型荧光灯产生的光更令人愉快的光。
摘要:
The maintenance characteristics of the phosphors used in VUV-excited devices such as plasma display panels can be improved by applying a coating of an aluminum oxyhydroxide compound by reacting vaporized trimethylaluminum with water vapor at a temperature of about 430° C. or above. In particular, the maintenance of an europium-activated, calcium-substituted barium hexa-aluminate phosphor is significantly improved following exposure to a high intensity VUV flux.
摘要:
Blue-emitting phosphors for use with plasma display panels (PDP) or other vacuum ultraviolet-excited (VUV) devices are provided. These blue-emitting phosphors and mixtures thereof include at least a europium-activated calcium-substituted barium hexa-aluminate (CBAL) phosphor. Preferably, the CBAL phosphor has a composition which may be represented by the formula: Ba1.29-x-yCaxEuyAl2O19.29, wherein 0
摘要翻译:提供了用于等离子体显示面板(PDP)或其它真空紫外激发(VUV)器件的蓝色发光荧光体。 这些蓝色发光荧光体及其混合物至少包含铕活化的钙取代的六铝酸钡(CBAL)磷光体。 优选地,CBAL荧光体具有可由下式表示的组成:Ba 1.29-xy Ca x Eu 2 Al 2 19.29其中0
摘要:
A lamp envelope is provided with an alumina layer and a multilayer phosphor coating on the alumina layer. The phosphor coating includes a top phosphor layer with a first weight percent of rare earth activators and a middle phosphor layer with a second weight percent of rare earth activators. The second weight percent is less than the first weight percent so that a total amount of the activators in the coating is reduced while maintaining a required lamp brightness and color rendering index (CRI). Preferably, the second weight percent is about 50-60% of the first weight percent and the middle layer is about 30-50% of a total weight of the coating so that a total weight of the activators in the coating is no more than about 80% of a weight of the activators in the coating if the first and second weight percents were the same.
摘要:
An electroluminescent lamp having a high color rendering index (CRI) can be made using a phosphor blend comprising a mixture of an electroluminescent phosphor and an europium-activated alkaline earth silicon nitride phosphor, wherein the electroluminescent phosphor is selected from a blue-emitting electroluminescent phosphor, a blue-green-emitting electroluminescent phosphor, or a combination thereof. Preferably, the lamp exhibits a CRI of at least about 75, and, more preferably, at least about 80. A preferred blend contains from about 10% to about 20% by weight of the europium-activated alkaline earth silicon nitride phosphor.