Koninklijke Philips Corporation N.V.

U.S. Philips Corporation

Lumileds LLC

Oliver Steigelmann

Henricus Albertus Maria Van Hal

Peter Josef Schmidt

Hans-Helmut Bechtel

Hendrik Johannes Boudewijn Jagt

Detlef Uwe Wiechert

Detlev F Hennings

Matthias Heidemann

Johannes Franciscus Maria Cillessen

Christoph Martiny

Dieter W Mateika

Knuth Albertsen

Cora Sieglinde Hecht

Petra Huppertz

Johannes Francisucs Maria Cillessen

Jacobus Gerardus Boerkekamp

Embodiments of the invention include a luminescent ceramic including (BaSr)SiON:Eu258 phase wavelength converting material (0.5&#x2264;x&#x2264;0.9; 0&#x2264;y&#x2264;1; 0.001&#x2264;z&#x2264;0.02) and MSiON3334 phase material (M=Ba, Sr, Eu). The MSiON3334 phase material comprises no more than 5 weight % of the material.

Wavelength converting material for a light emitting device

The invention provides a lighting device comprising a solid state light source and a ceramic body, wherein the solid state light source is configured to provide blue light source light to the ceramic body, wherein the ceramic body comprises a ceramic material configured to wavelength convert part of the blue light source light into yellow converter light, to provide white lighting device light comprising said blue light source light and said yellow converter light, said white lighting device light having a color point selected from the range of 0.18&#x2264;u'&#x2264;0.25 and 0.42&#x2264;v&#x2032;&#x2264;0.54, and wherein the ceramic material comprises a (Y,Gd,Lu, Ce)(Al,Ga)Oceramic material, with 0&#x2264;x&#x2264;0.6, 0&#x2264;y&#x2264;0.5, 0&#x2264;q&#x3c;1 and 0.001&#x2264;z&#x2264;0.06.

White phosphor converted LED with stable flux output versus temperature

The present invention relates to a light emitting device () comprising at least one light emitting diode () and at least one porous ceramic element (), which ceramic element () is arranged to receive light from the light emitting diode(s) (). The present invention also relates to methods for the manufacture of the light emitting device () and of the porous ceramic element ().

Light scattering by controlled porosity in optical ceramics for LEDs

The present invention relates to an optical element for a light emitting device, wherein the optical element comprises a sintered ceramic body () comprising a wavelength converting layer () and a scattering layer (), and to a method of manufacturing thereof. More specifically, the invention relates to an optical element, comprising a sintered ceramic body () of a first layer () and a second layer () arranged on the first layer, wherein the first layer comprises a wavelength converting material, the porosity of the second layer is higher than the porosity of the first layer, and pores in the second layer are arranged to provide scattering of a light beam. The method for manufacturing of the optical element comprises providing a green body comprising a first layer of a first material and a second layer of a second material; and co-sintering said layers into a sintered ceramic body; the compositions of the first and second layer are adapted such that after sintering, the porosity of the second layer is higher than the porosity of the first layer, and pores in said second layer are arranged to provide scattering of a light beam.

Optical element for a light emitting device and a method of manufacturing thereof

A gas discharge lamp has electrodes of Ba(Ti Zr )O with donor/acceptor dopants. Specific donor/acceptor combinations, an optimized content of zirconium and an optimized atomic ratio between the cations leads to ferroelectric ceramic exhibiting high values of the remnant polarization P and the dielectric constant &ggr; , as well as rectangular hysteresis loop and low coercive field strengths E . When an alternating voltage is applied to the ferroelectric electrodes, the non-linear properties of the electrodes bring about the ignition of the lamp as well as the continuous operation thereof.

Gas discharge lamp having ferroelectric ceramic electrodes

A capacitor having a ceramic dielectric and at least two electrodes, the ceramic dielectric being predominantly composed of a dielectric, ceramic composition having a main component of BaTiO.sub.3 and/or �Ba.sub.1-y Sr.sub.y !Ti.sub.x O.sub.31 z, wherein 0.95.ltoreq.x.ltoreq.0.995, 0.ltoreq.y.ltoreq.0.04, z=2(1-x), and having at least an additive of the group formed by XMnO.sub.3, X.sub.2 MoO.sub.6, X.sub.2 WO.sub.6, X.sub.2 SiO.sub.5 +Mn.sub.2 SiO.sub.4 and Li.sub.2 SiO.sub.3 +Mn.sub.2 SiO.sub.4, and at least an additive of the group formed by Li.sub.2 SiO.sub.3, SiO.sub.2 and a mixture of 6 mol % Li.sub.2 O, 13 mol % BaO, 13 mol % SrO, 13 mol % MgO and 55 mol % SiO.sub.2, which is calcined at 800.degree. C., and, if necessary, an additive of the group formed by XInO.sub.3, XGaO.sub.3 and XAlO.sub.3, wherein X is one or more elements of the group formed by Y, Dy and Er, is characterized by a flat .DELTA.C/.DELTA.t curve and a stable dielectric behavior on exposure to temperature and voltage influences.

Multilayer capacitor comprising a dielectric of modified barium

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Aachen, Germany

Oliver Steigelmann