Koninklijke Philips Corporation N.v.

U.S. Philips Corporation

Philips Lumileds Lighting Company LLC

Lumileds LLC

Lumileds Lighting U.s., LLC

Koninkiljke Phillips Electronics N.v.

Philips Lumileds Lighting, Us, LLC

Lumileds Holding B.v.

Philips Intellectual Property & Standards Gmbh

Walter Mayr

Peter Josef Schmidt

Thomas Juestel

Hans-Helmut Bechtel

Joerg Meyer

Detlef Uwe Wiechert

Wolfgang Schnick

Baby-Seriyati Schreinemacher

Cornelis Reinder Ronda

Hans Nikol

Thomas Justel

Wolfgang Busselt

Helmut Bechtel

Thomas J&uuml;stel

Thomas Jüstel

Gerd O Mueller

Regina B Mueller-Mach

Claus Feldmann

Jorg Meyer

Hans-Dieter Bausen

Oleg Borisovich Shchekin

Joachim F Opitz

Volker Weiler

Wolfram Czarnojan

Heinrich Von Busch

Cora Sieglinde Hecht

Gerd Mueller

Danielle Chamberlin

Regina Mueller-Mach

Florian Stadler

Herfried Karl Wieczorek

Rainer Hilbig

Josef Lauter

Matthias Heidemann

Gero Heusler

Markus Haase

Volker Dirk Hildenbrand

Olaf Mastenbroek

Hans-Otto Jungk

Petra Huppertz

Juliane Kechele

Harald Gl&auml;ser

Henning Höppe

Gerd Romanowski

Joseph Lauter

Jörg Meyer

Hartmut Lade

Oliver Michael Oeckler

Henning Hoeppe

Regina B Müller-Mach

Gerd O Müller

Jorge Meyer

Cornelis Rhonda

Peter Schmidt

In a method according to embodiments of the invention, for a predetermined amount of light produced by a light emitting diode and converted by a phosphor layer comprising a host material and a dopant, and for a predetermined maximum reduction in efficiency of the phosphor at increasing excitation density, a maximum dopant concentration of the phosphor layer is selected.

Wavelength converted light emitting device

The invention provides a lighting device configured to provide white lighting device light, the lighting device comprising (i) a light source, configured to provide blue light source light, and (ii) a luminescent material element, configured to absorb at least part of the blue light source light and to convert into luminescent material light, wherein the luminescent material element comprises a luminescent material which consists for at least 80 wt. % of a MEuSiAlONphosphor, wherein M comprises one or more of Mg, Ca, Sr, Ba, with a molar ratio of (Mg+Ca+Sr)/(Ba)&#x2264;0.1, wherein x is in the range of 0.001-0.02, wherein y is in the range of &#x2264;0.2, and wherein the white lighting device light comprises said blue light source light and said luminescent material light.

Phosphor converted LED

The invention relates to a white emitting light source with an improved luminescent material of the formula (AEN2/3)*b(MN)*c(SiN4/3)*d1CeO3/2*d2EuO*xSiO2*yAlO3/2 wherein AE is an alkaline earth metal chosen of the group of Ca, Mg, Sr and Ba or mixtures thereof and M is a trivalent element chosen of the group of Al, B, Ga, Sc with d1&#x3e;10*d2. In combination with a UV to blue light generating device this material leads to an improved light quality and stability, especially an improved temperature stability for a wide range of applications.

White emitting light source and luminescent material

The invention relates to a novel red emitting material of (BaSrCaEu)SiAlNOhaving an average particle size distribution dof &#x3e;6 &#x3bc;m, with 0.3&#x2266;x&#x2266;0.9, 0.01&#x2266;y&#x2266;0.1, 0.005&#x2266;z&#x2266;0.04, 0&#x2266;a&#x2266;0.2 and 0&#x2266;b&#x2266;0.2.

Red emitting luminescent materials

The invention relates to a white emitting light source with an improved luminescent material of the formula (AEN2/3)*b (MN)*c (SiN4/3)*d1 CeO3/2*d2 EuO*x SiO2*y AlO3/2 wherein AE is an alkaline earth metal chosen of the group of Ca, Mg, Sr and Ba or mixtures thereof and M is a trivalent element chosen of the group of Al, B, Ga, Sc with d1&#x3e;10*d2. In combination with a UV to blue light generating device this material leads to an improved light quality and stability, especially an improved temperature stability for a wide range of applications.

An illumination system, comprising a radiation source and a luminescent material comprising at least one phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light; wherein said at least one phosphor is a yellow red-emitting cerium(III)-activated alkaline earth oxonitridoaluminosilicate of general formula Ca1&#x2212;x&#x2212;yAxAl1+a&#x2212;bBbSi1&#x2212;aN3&#x2212;aOa:Cey, wherein A selected from the group comprising beryllium, magnesium, strontium, barium, zinc, manganese, lithium, sodium, potassium, rubidium, praseodymium, samarium, europium, and B selected from the group comprising boron, gallium, scandium and wherein 0&#x3c;x&#x2266;1; 0&#x3c;y&#x3c;0.2; 0.001&#x3c;a&#x3c;1 and 0.001&#x3c;b&#x3c;1 can provide light sources having high luminosity and color-rendering index, especially in conjunction with a light emitting diode as a radiation source. The red to yellow-emitting cerium(III)-activated alkaline earth oxonitridoaluminosilicate of general formula Ca1&#x2212;x&#x2212;yAxAl1+a&#x2212;bBbSi1&#x2212;aN3&#x2212;aOa:Cey, wherein A selected from the group comprising beryllium, magnesium, strontium, barium, zinc, manganese, lithium, sodium, potassium, rubidium, praseodymium, samarium, europium, and B selected from the group comprising boron, gallium, scandium and wherein 0&#x3c;x&#x2266;1; 0&#x3c;y&#x3c;0.2; 0.001&#x3c;a&#x3c;1 and 0.001&#x3c;b&#x3c;1 is efficiently excitable by primary radiation in the near UV-to-blue range of the electromagnetic spectrum.

Illumination system comprising a radiation source and a luminescent material

The invention relates to a light emitting device, especially a LED comprising a green emitting material of the composition SrMSiAlON:Eu:Ce. This material has been found to have a narrow emission in the green wavelight range together with a good producibility and stability.

Light emitting device comprising a green emitting sialon-based material

White emitting light source and luminescent material with improved colour stability

The invention relates to a red emitting material of the composition a(MN)*b(MN)*c(MN)*dCeO*dEuO*xMO2*yMOwith Cerium and Europium present in the material. This material has been found to have an increased lumen equivalent and absorption efficiency of blue light.

Red emitting SiAlON-based material

The invention relates to an improved red light emitting material of the formula MASiNO:RE whereby M is selected out of the group comprising Ba, Sr, Ca, Mg or mixtures thereof, A is selected out of the group comprising Al, Ga, B or mixtures thereof, RE is selected out of the group comprising rare earth metals, Y, La, Sc or mixtures thereof and x is &#x2267;0 and &#x2266;1 and y is &#x2267;0 and &#x2266;0.2. This material is believed to crystallize in a novel structure type that comprises two individual lattice sites for rare earth metal incorporation, which leads to an improved lighting behaviour.

A UVB phosphor of the composition (Laj_,,,Gd,,Y)PO4:Ce, is described, in which x=0 to 0.5, y=0 to 0.5 and z=0.01 to 0.3 and the sum of x, y and z is less than 1. From a phosphor of this kind, a phosphor layer can be produced that, in fluorescent lamps based on low-pressure mercury discharge lamps, produces a spectrum of 5 UV light that is particularly well suited to the cosmetic or medical treatment of the skin.

Fluorescent lamp having a UVB phosphor

A light emitting device with a light source to emit primary light and a light conversion layer to convert at least a part of the primary light into secondary light includes a CaAlSiN light converting material with a transmissivity of &#x2267;10% to &#x2266;80% for a light in the wavelength range from &#x2267;580 to &#x2266;1000 nm.

Light emitting device with an improved CaAlSiN light converting material

The invention relates to an improved red light emitting material of the formula MASiNO:RE whereby M is selected out of the group comprising Ba, Sr, Ca, Mg or mixtures thereof, A is selected out of the group comprising Al, Ga, B or mixtures thereof, RE is selected out of the group comprising rare earth metals, Y, La, Sc or mixtures thereof and x is &#x2267;0 and &#x2266;1 and y is &#x2267;0 and &#x2266;0.2. This material is believed to crystallize in a novel structure type that comprises two individual lattice sites for rare 10 earth metal incorporation, which leads to an improved lighting behavior.

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Alsdorf, Germany

Walter Mayr