Abstract: The invention relates to a luminescence conversion led based illumination deice that emits primarily radiation in the range of from 370 and 430 nm of the optical spectrum (peak wavelength). Said radiation is converted to radiation having a longer wavelength using three luminescent substances that emit in the red, green and blue range.

Abstract: A luminescent powder (1) with luminescent particles (2) having an average luminescent-particle size (3) selected from the range of from 0.1 ?m inclusive to 5.0 ?m inclusive. The luminescent particles comprise primary particles (4) having an average primary-particle size (5) selected from the range of from 0.1 ?m inclusive to 1.0 ?m inclusive. The primary particles which, for example, consist of a cerium-doped yttrium-aluminum garnet (Y3Al5O12), are agglomerated to form the luminescent particles. A method for producing the luminescent powder has the following steps: a) preparing at least one precursor of the primary particles, b) producing the primary particles from the precursor of the primary particles, and c) forming the luminescent particles of the luminescent powder from the primary particles. The precursor for Y3Al5O12 is, for example, a powder mixture of hydroxides.

Abstract: A device for the generation of specific colored light including white light by luminescent down conversion and additive color mixing based on a light-emitting diode (LED) comprising a semiconductor light-emitting layer emitting near UV light about 370-420 nm or blue light about 420-480 nm and phosphors which absorb completely or partly the light emitted by the light-emitting component and emit light of wavelengths longer than that of the absorbed primary light, wherein the light emitting layer of the light emitting component is preferably a Ga(In)N-based semiconductor; and at least one of the phosphors contains a metal sulfide fluorescent material activated with europium containing at least one element selected from the group consisting of Ba, Sr, Ca, Mg and Zn; and/or at least another phosphor which contains a complex thiometalate fluorescent material activated with either europium, cerium or both europium and cerium containing 1) at least one element selected from the group consisting of Ba, Sr, Ca, Mg and

Abstract: The invention relates to a light source (1), having at least one LED (2) for emitting a primary radiation (4) and at least one luminescence conversion body (3) having at least one luminescent material for converting the primary radiation (4) into a secondary radiation (5). The luminescence conversion body is a polycrystalline ceramic body. The LED is based on GaInN and emits blue primary radiation. The ceramic body comprises for example a luminescent material based on a cerium-doped yttrium aluminum garnet. This luminescent material emits yellow secondary radiation. Blue primary radiation and yellow secondary radiation penetrate through the luminescence conversion body and are perceived as white light by the observer. In order to produce the luminescence conversion body, provision is made of a polycrystalline ceramic body which is united with a solution of a dopant. By means of a thermal treatment, the dopant (activator) diffuses into the ceramic body, the luminescent material being formed.

Abstract: A device for the generation of specific colored light including white light by luminescent down conversion and additive color mixing based on a light-emitting diode (LED) comprising a semiconductor light-emitting layer emitting near UV light about 370-420 nm or blue light.

Abstract: The invention relates to a method for producing high-density, translucent, scintillator ceramics by means of a pressure-less sintering carried out at an elevated temperature. According to the method, particles of a MOS composition are prepared using a specific wet milling method whereby being reduced, in particular, to a particle size of less than 10 &mgr;m. The particles are compacted to form compacted bodies with green densities of up to 50% and higher. The sintering is carried out under specific sintering parameters.

Abstract: The invention relates to a luminescence conversion led based illumination deice that emits primarily radiation in the range of from 370 and 430 nm of the optical spectrum (peak wavelength). Said radiation is converted to radiation having a longer wavelength using three luminescent substances that emit in the red, green and blue range.

Abstract: A high efficiency phosphor from the class of the thiometallates, preferably of the thiogallates. The thiometallate being made so as to correspond to the formula (AS)·w(B2S3), where A is at least one divalent cation selected from Mg, Ca, Sr, and where B is at least one trivalent cation selected from Al, Ga, Y. The factor w may lie either in the range 0.8 ≦w ≦0.98 or in the range 1.02 ≦w ≦1.2.

Abstract: Hybrid LED having a radiation-emitting semiconductor body (chip) which is surrounded by a housing which comprises at least a base body and a cap, the chip being seated in a recess of the base body, and the primary radiation of the chip being converted at least partially into longer wave radiation by a conversion means. The cap is formed by a glass-like body, the conversion means being contained in the glass-like body.

Abstract: Phosphor from the class of the thiometallates, preferably of the thiogallates, the thiometallate being made up so as to correspond to the formula (AS)·w(B2S3), where A is at least one divalent cation selected from the group consisting of Mg, Ca, Sr, and where B is at least one trivalent cation selected from the group consisting of Al, Ga, Y, where the factor w may lie either in the range 0.8>w>0.98 or in the range 1.02>w>1.2.

Abstract: The vehicle air-conditioning system according to the invention has at least one air-conditioning air duct with at least one air outflow nozzle having an automatically adjustable air guiding arrangement, a sun radiation sensing system, and an air-conditioning control unit which generates control commands for automatically adjusting the air guiding arrangement at least as a function of the output signals of the sun radiation sensing system. The air-conditioning control unit uses output signals from the sun radiation sensing system to determine the local distribution of sun radiation in the area of a particular vehicle seat and, as a function thereof, automatically adjusts the air guiding arrangement or arrangements assigned to the respective vehicle seat.

Abstract: A phosphor for a high energy radiation detector is formed by a rare earth oxisulfide having the general sum formula (M.sub.1-x Ln.sub.x).sub.2 O.sub.2 S, wherein M is at least one element of the group Y, La and Gd, Ln stands for at least one element of the group Eu, Ce, Pr, Tb, Yb, Dy, Sm and Ho, and whereby (2.times.10.sup.-1).gtoreq..times..gtoreq.(1.times.10.sup.-6), which also contains molybdenum in a proportion between 10.sup.-1 and 10.sup.-6 mol percent for reducing the afterglow of the phosphor.

Abstract: In an improved method for manufacturing a phosphor ceramic on the basis of a rare earth oxisulfide, a phosphor powder having a high specific surface of more than 10 m.sup.2 per gram is employed and is compressed to form a high-density, optically pure and translucent ceramic by single-axis hot-pressing under a reducing atmosphere.

Abstract: For manufacturing a scintillator ceramic of a rare earth oxisulfide, a pigment powder is compressed by single-axis hot-pressing to form a ceramic member having at least 99.9% of the theoretic density, the pigment powder having the general formula (M.sub.1 xLn.sub.x).sub.2 O.sub.2 S, whereby M denotes at least one element from the group Y, La and Gd, Ln represents at least one element from the group Eu, Ce, Pr, Tb, Yb, Dy, Sm and Ho, and whereby 1.times.10.sup.-6 .ltoreq.x.ltoreq.2.times.10.sup.-1, and the powder having a specific surface according to BET of at least 10 m.sup.-2 /g.