Osram Gesellschaft MIT Beschrankter Haftung

Osram Opto Semiconductors Gmbh

Jörg Strauβ

Frank Jermann

Tim Fiedler

Herbert Brunner

Martin Zachau

Bert Braune

Daniel Becker

LEDs having a low color temperature up to 5000 K, comprising a blue-emitting LED and, connected upstream thereof, two phosphors having a first phosphor from the class of the chliorosilicates and a second phosphor from the class of the nitridosilicates having the formula (Ca,Sr)SiN:Eu.

Light source with a low color temperature

A luminescence conversion LED having a radiation emitting chip that is connected to electrical connections and is surrounded by a housing that comprises at least a basic body and a cap, the chip being seated on the basic body, in particular in a cutout of the basic body, and the primary radiation of the chip being converted at least partially into longer wave radiation by a conversion element, wherein the cap is formed by a vitreous body, the conversion means being contained in the vitreous body, the refractive index of the vitreous body being higher than 1.6, preferably at least n=1.7.

Luminescence conversion LED

LED with a low color temperature up to 3500 K, comprising a blue-emitting LED with two phosphors in front of it, a first phosphor from the class of the oxynitridosilicates, having a cation M, which is doped with divalent Europium, and has the empirical formula M)SiON:D, with M=Sr, or M=SrBaCawith x+y&#x3c;0.5 being used, the oxynitridosilicate completely or predominantly comprising the high-temperature-stable modification HT, and a second phosphor from the class of the nitridosilicates of formula (Ca,Sr)SiN:Eu.

White-emitting LED having a defined color temperature

A luminescence conversion of LED, which uses a blue emitting chip and two illuminating substances, whereby one emits a red and the other a yellow to green. Both illuminating substances are separated upstream from the chip.

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Wuppertal, Germany

Jörg Strauβ