Loading patent…
AssigneesOSRAM Opto Semiconductors GmbH, Symyx Technologies, Inc.
InventorsEarl Danielson, Andries Ellens, Frank Jermann, Wolfgang Rossner, Martin Devenney, Daniel Giaquinta, Manfred Kobusch
Estimating the term…
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 Zn and 2) at least one element selected from the group consisting of Al, Ga, In, Y, La and Gd.
A light emitting device comprising at least one LED with primary emission (peak) from 370 to 480 nm covered directly or indirectly with a phosphor-containing covering, the phosphor-containing covering comprising at least one of the following phosphors:
A light emitting device comprising a blue emitting LED covered with a phosphor containing covering, the phosphor-containing covering containing at least one of the following phosphors:
A light emitting device comprising a UV emitting LED covered with a phosphor containing covering, the phosphor-containing covering containing at least one of the following phosphors:
A phosphor which absorbs radiation having a first spectrum and emits radiation having a second spectrum, the phosphor comprising:
Dependencies are inferred from the claim text.