Koninklijke Philips Corporation N.v.

U.S. Philips Corporation

Lumileds Lighting U.s., LLC

Koninklijke Philips Electronics N.v.

U.S. Philips Cororation

Philips Lumileds Lighting Company LLC

Philips Intellectual Property & Standards Gmbh

Wolfgang Busselt

Hans-Helmut Bechtel

Peter Josef Schmidt

Hans Nikol

Thomas Juestel

Joachim F Opitz

Helmut Bechtel

Walter Mayr

Dietrich Bertram

Harald Glaeser

Cornelis Reinder Ronda

Herbert Friedrich Boerner

Joerg Meyer

Thomas J&uuml;stel

Thomas Justel

Markus Heinrich Klein

Claus Feldmann

Thomas Jüstel

Hans Helmut Bechtel

Herbert Friedrich B&ouml;rner

Harald Gläser

Silvia Golsch

Gerd O Mueller

Regina B Mueller-Mach

Detlef Uwe Wiechert

Georg Friedrich Gartner

Horst Greiner

Volker Van Elsbergen

Martin Weibrecht

Markus Haase

Cornelis Jojakim Jalink

Stefan Peter Grabowski

Georg Friedrich Gaertner

Baby-Seriyati Schreinemacher

Peter J Quadflieg

Ulrich H Kynast

Olaf Mastenbroek

Harald Gl&auml;ser

Herbert Friedrich Borner

Volker Bachmann

Herbert F Borner

Franscisus Altena

Gerard Harbers

Herbert Friedrich Börner

Eliav Itzhak

Peter Schmidt

Eliav Itzhak Haskal

A conversion element () comprising a ceramic material () with a multiplicity of pores () provided for at least the partial absorption of at least one primary radiation () and for transforming the primary radiation () into at least one secondary radiation (), wherein the conversion element () has a density greater than or equal to 97% of the theoretical solid-state density of the ceramic material (), and the pores () in the conversion element () have a diameter substantially between 200 nm and 5000 nm.

Electroluminescent device

An electroluminescent light source includes a layer structure comprising a first sublayer structure comprising at least one electrode as anode, one electrode as cathode and an electroluminescent layer located therebetween for emitting light, a second sublayer structure which adjoins the electrode provided for transmission, said second sublayer structure consisting of at least one semitransparent layer for partially reflecting the light, and a third sublayer structure which, as seen in the emission direction of the light, is arranged behind the second sublayer structure, said third sublayer structure comprising at least one layer having particles for absorbing some of the light at wavelengths below a threshold wavelength, for emitting light at wavelengths above the threshold wavelength, and for scattering the non-absorbed light.

Electroluminescent light source with improved color rendering

An illumination device includes an active layer, such as a blue LED, covered with a first luminescent ceramic converter layer and partially covered with a second luminescent ceramic converter layer. The first and second conversion layers convert primary photons emitted by the active layer into photons of different, longer wavelengths. The color point of the illumination device can be adjusted by adjusting the relative size of the second conversion layer.

Illumination device, particularly with luminescent ceramics

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

An organic electroluminescent light source has at least one substrate and layers that are arranged on the substrate. The layers include electrodes of which at least one electrode is transparent and one acts as an anode and one as a cathode, and at least one organic electroluminescent layer that is arranged between the electrodes. The organic electroluminescent layer has regions that emit blue light and/or green light, and at least one phosphor layer that is arranged in the beam path of the light leaving the organic electroluminescent light source and that partly covers the electroluminescent layer.

Electroluminescent light source

A light emitting system () comprising a radiation source () capable of emitting a first light of at least a first wavelength spectrum; a first fluorescent material () capable of absorbing at least partially the first light and emitting second light having a second wavelength spectrum; a second fluorescent material () capable of absorbing at least partially the first light and emitting a third light having a third wavelength spectrum; wherein one, the first () or the second fluorescent material () is a polycrystalline ceramic with a density of more than 97 percent of the density of a monocrystalline material and the respective other fluorescent material is a phosphor powder with a median particle size 100 nm&#x3c;d&#x3c;50 &#x3bc;m.

Fluorescent lighting creating white light

The invention relates to a light-emitting device comprising a conversion structure and one or several LEDs (), which emit light into the conversion structure. The light is then converted and emitted with a high radiant flux.

Light emitting device with conversion structure

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 R&#x2266;30 nm and R&#x2267;1 nm.

LED with improved light emission profile

An electroluminescent device comprising at least one electroluminescent light source () with an electroluminescent layer () for emitting a primary radiation with an emission characteristic around a mean emission direction (), and at least one light-converting element () for converting at least part of the primary radiation into a secondary radiation, wherein the shape of the light-converting element () is adapted to the emission characteristic of the electroluminescent light source () so as to generate a defined correlated color temperature as a function of a viewing angle ().

A substrate () made of a transparent material, preferably glass, which substrate has a planar first side () for the application of an electroluminescent layered structure () for emitting light and having a structured second side () for the effective coupling-out of light (), comprising at least one element of structure () comprising first regions () having first surfaces () that have a surface roughness of between 0.2 &#x3bc;m and 100 &#x3bc;m, and preferably of between 0.4 &#x3bc;m and 70 &#x3bc;m, and as a particular preference of between 0.7 &#x3bc;m and 40 &#x3bc;m.

Structured substrate for a LED

An Illumination system comprising a radiation source and a monolithic ceramic luminescence converter comprising at least one phosphor capable of absorbing a part of the light emitted by the radiation source and emitting light of a wavelength different from that of the absorbed light, wherein said at least one phosphor is an europium(II)-activated oxonitridosilicate of the general formula (Sr1-a-b-c-d-e-fCabBacMgdZneCef)Six-gGegNyOz:Eua, wherein 0.001&#x3c;a&#x3c;0.2, 0.0&#x3c;b&#x3c;1.0, 0.0&#x3c;c&#x3c;0.5, 0.0 &#x3c;d&#x3c;0.25, 0.0&#x3c;e&#x3c;0.25, 0.0&#x3c;f&#x3c;0.2, 0.0&#x3c;g&#x3c;1.0, 1.5&#x3c;x&#x3c;2.5, 1.5&#x3c;y&#x3c;2.5 and 1.5&#x3c;z&#x3c;2.5.

Illumination system comprising a green-emitting ceramic luminescence converter

A light-emitting device comprising a solid-state light source (), at least one conversion element () and a light-scattering element (), wherein the solid-state light source () is provided to emit a first part () of a primary radiation for entry into the light-scattering element () and a second part () of a primary radiation for entry into the conversion element () for at least partial conversion into at least one secondary radiation (), the light-scattering element () is provided to generate a mixed radiation () having a Lambertian light distribution pattern from the first part () of the primary radiation, the secondary radiation () and a portion of the second part () of the primary radiation that has not been converted in the conversion element (), and the first part () of the primary radiation leaves the light-emitting device without having passed the conversion element ().

Light-emitting device

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.

Electroluminescence device

An LED includes a substrate layer with a first surface and a second surface opposing the first surface and having a refractive index of n. 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 nbeing n2&#x2267;n&#x2212;0.5 and n&#x2266;n+3. Further, the filling height of the index matching layer is lower than the maximum height of the array of particles.

LED with improved light emittance profile

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.

Electroluminescent device with a transparent cathode

Growing community of inventors

Roetgen, Germany

Wolfgang Busselt