Abstract: This invention relates to a device for determining the conversion power of conversion element, a method for performing these measurements and a method for producing pcLEDs with essentially the same color point applying said device and said method.

Abstract: A light emitting device includes a substrate layer and a light conversion layer located on said substrate layer. The light conversion layer is a polycrystalline ceramic layer, and is positioned on the substrate layer by sintering.

Abstract: An LED includes a substrate, a first electrode layer and a thin colloidal layer located between the substrate and the first electrode layer. A smoothening layer or particles located within or on the colloidal layer is provided so that the roughness of the outer surface of the colloidal layer which is facing towards the first electrode layer is Ra?30 nm and Ra?1 nm.

Abstract: This invention relates to a device for determining the conversion power of conversion element, a method for performing these measurements and a method for producing pcLEDs with essentially the same color point applying said device and said method.

Abstract: An electroluminescence device includes at least one electroluminescence light source for emitting a primary radiation, such as having wavelengths between 200 nm and 490 nm, and at least one light-converting element, arranged in the path of the rays of the primary radiation, for partial absorption of the primary radiation and emission of a secondary radiation. The light-converting element has a dilatation or expansion in the radiation direction of the primary radiation, which is less than an average scattering length of the primary radiation in the light-converting element.

Abstract: The invention relates to photonic materials having regularly arranged cavities containing at least one colorant, where the wall material of the photonic material has dielectric properties and as such is essentially non-absorbent for the wavelength of an absorption band of the respective colorant and is essentially transparent for the wavelength of a colorant emission which can be stimulated by the absorption wavelength, and the cavities are shaped in such a way that radiation having the wavelength of the weak absorption band of the colorant is stored in the photonic material, to the use thereof as phosphor system in an illuminant, to corresponding illuminants and production processes.

Abstract: An LED includes a substrate layer with a first surface and a second surface opposing the first surface and having a refractive index of n1. A light emitter is provided on the first surface and an array of particles is arranged on the second surface. The index matching layer between the particles on the second surface has a refractive index of n2being n2?n1?0.5 and n2?n1+3. Further, the filling height of the index matching layer is lower than the maximum height of the array of particles.

Abstract: An electroluminescent device includes a transparent cathode and a substrate. A laminated body is provided Adjacent to the substrate. The laminated body includes a first electrode, an electroluminescent layer and a second metallic electrode. The second electrode is covered with transparent dielectric layers which increase the transmission of light through the second metallic electrode and serve as filters.

Abstract: The invention is concerned with a low-pressure mercury vapor discharge lamp comprising a light-transmitting discharge vessel, said discharge vessel enclosing, in a gastight manner, a discharge space provided with a filling of mercury, at least a part of a wall of the discharge vessel being provided with a luminescent composition comprising a first UV-A phosphor of general formula (Gd1-x-y-zYxLuy)PO4:Cez, wherein 0?x<1.0, 0?y<1.0, 0<z?0.2 and x+y+z<1, the low-pressure mercury vapor discharge lamp comprising also discharge means for igniting and maintaining an electric discharge in the discharge vessel. Such lamp is especially useful for tanning purposes as well as cosmetic and medical purposes. The invention is also concerned with an UV-A phosphor of general formula (Gd1-x-y-zYxLuy)PO4:Cez, wherein 0?x<1.0, 0?y<z?0.2 and x+y+z<1.

Abstract: The invention relates to a light emitting device comprising a substrate layer and a light conversion layer located on said substrate layer, whereby the light conversion layer is a polycrystalline ceramic layer, characterized in that the light conversion layer is positioned on the substrate layer by sintering.

Abstract: The invention relates to a light emitting plate system (1), in which the plate (10) is equipped with at least one particle layer (40), the particle (50) of which have been designed to achieve an improved transparency and light extraction efficiency of the plate (10).

Abstract: The invention relates to a process for the incorporation of nanophosphors (phosphors) into micro-optical structures, and to corresponding illuminants. In this impregnation process, a micro-optical system comprising inverse opal powders is filled with a dispersion of a nanophosphor.

Abstract: The present invention relates to a LED comprising a substrate layer with a first surface and a second surface opposing the first surface and having a refractive index of n1, a light emitting means provided on said first surface and an array of particles arranged on said second surface, characterized by an index matching means between said particles on said second surface having a refractive index of n2 being n2?n1?0.5 and n2?n1+3 and whereby the filling height of the index matching means is lower than the maximum height of the array of particles.

Abstract: An electroluminescence device comprising at least one electroluminescence light source (2) for emitting a primary radiation, preferably having wavelengths between 200 nm and 490 nm, and at least one light-converting element (3), arranged in the path of the rays of the primary radiation, for partial absorption of the primary radiation and emission of a secondary radiation, wherein the light-converting element (3) has a dilatation in the radiation direction (5) of the primary radiation, which is less than an average scattering length of the primary radiation in the light-converting element (3).

Abstract: Electroluminescence light source having a transparent substrate (2), an electroluminescent layer structure for emitting light throughthe substrate, a first light outcoupling layer (3) arranged between substrate and electroluminescent layer structure for producing a non-uniform angular distribution of the light upon entry of the light into the substrate (2), and a second light outcoupling layer (1) arranged above the substrate (2) when viewed in the direction of propagation of light (7), with a surface structure adapted to the non-uniform angular distribution of the light for the effective light outcoupling from the electroluminescence light source.

Abstract: Illumination system comprising a radiation source and a luminescent material comprising a first phosphor capable of absorbing part of the light emitted by the radiation source and emitting light of a wavelength different from that of the absorbed light; wherein said first phosphor comprises europium(III) as an activator in a host lattice selected from the compounds of an anionic oxygen-containing species with a cationic metal species, comprising yttrium(III) and gadolinium(III). A light-emitting diode as a radiation source is especially contemplated. The invention also relates to a red to amber yellow emitting europium(III)-activated phosphor comprises europium(III) as an activator in a host lattice selected from the compounds of an anionic oxygen-containing species with a cationic metal species, comprising yttrium(III) and gadolinium(III).

Abstract: The present invention relates to a LED comprising a substrate, a first electrode layer and a thin colloidal layer located between the substrate and the first electrode layer, whereby the LED furthermore comprises a smoothening means located within or on the colloidal layer so that the roughness of the outer surface of the colloidal layer which is facing towards the first electrode layer is Ra?30 nm and Ra?1 nm.

Abstract: The invention relates to an electroluminescent device comprising a substrate (1), a porous layer (2) that borders on the substrate (1), a laminated body that borders on the porous layer (2) and that is composed of at least a first electrode (3), an electroluminescent layer (4) and a second electrode (5), a colored material, preferably an ink, being present at least partially in the pores of the porous layer (2). The porous layer (2) may be segmented and include a plurality of different colored materials, so that a black matrix structure and/or a color filter structure is obtained. The invention also relates to a method of manufacturing an electroluminescent device.

Abstract: The invention is concerned with a low-pressure mercury vapor discharge lamp comprising a light-transmitting discharge vessel, said discharge vessel enclosing, in a gastight manner, a discharge space provided with a filling of mercury, at least a part of a wall of the discharge vessel being provided with a luminescent composition comprising a first UV-A phosphor of general formula (Gd1-x-y-zYxLuy)PO4:Cez, wherein 0?x<1.0, 0?y<1.0, 0<z?0.2 and x+y+z<1, the low-pressure mercury vapor discharge lamp comprising also discharge means for igniting and maintaining an electric discharge in the discharge vessel. Such lamp is especially useful for tanning purposes as well as cosmetic and medical purposes. The invention is also concerned with an UV-A phosphor of general formula (Gd1-x-y-zYxLuy)PO4:Cez, wherein 0?x<1.0, 0?y<z?0.2 and x+y+z<1.

Abstract: The invention relates to an electroluminescent device with a transparent cathode. Said electroluminescent device comprises a substrate (1) and, adjacent to said substrate (1), a laminated body composed of a first electrode (2), an electroluminescent layer (3) and a second metallic electrode (4). Said second electrode (4) is covered with transparent dielectric layers (5), which increase the transmission of light through the second metallic electrode (4) and serve as filters.