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AssigneeOSRAM Opto Semiconductors GmbH
InventorsFrank BAUMANN, Norbert BOENISCH, Tim FIEDLER, Frank JERMANN, Stefan LANGE, Reiner WINDISCH
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Conversion LED emits primary radiation (peak wavelength 435 nm to 455 nm) and has a luminescent substance-containing layer positioned to intercept the primary radiation and convert it into secondary radiation. First and second luminescent substances are used. The first luminescent substance is a A3B5O12:Ce garnet type emitting yellow green having cation A=75 to 100 mol. % Lu, remainder Y and a Ce content of 1.5 to 2.9 mol. %, where B=10 to 40 mol. % Ga, remainder Al. The second luminescent substance is of the MAlSiN3:Eu calsine type which emits orange red, where M is Ca alone or at least 80% Ca and the remainder of M may be Sr, Ba, Mg, Li or Cu, in each case alone or in combination, wherein some of the Al up to 20%, can be replaced by B, and wherein N can be partially replaced by O, F, Cl, alone or in combination.
A conversion LED configured to replace an incandescent lamp comprising a chip which emits primary radiation and a luminescent substance-containing layer which is on the chip or positioned so that it intercepts the primary radiation emitted from the chip and which converts at least some of the primary radiation of the chip into secondary radiation, wherein
A conversion LED comprising a chip which emits primary radiation and a luminescent substance-containing layer which is on the chip or positioned so that it intercepts the primary radiation emitted from the chip and which converts at least some of the primary radiation of the chip into secondary radiation, wherein a first luminescent substance of the A3B5O12:Ce garnet type which emits yellow green and a second luminescent substance of the MAlSiN3:Eu calsine type which emits orange red is used, wherein the peak wavelength of the primary radiation lies in the 435 nm to 455 nm range, the first luminescent substance being a garnet having essentially the cation A=75 to 100 mol. % Lu, remainder Y and a Ce content of 1.5 to 2.9 mol. %, where B=10 to 40 mol. % Ga, remainder Al, while the second luminescent substance is of the basic MAlSiN3:Eu type, where M is Ca alone or at least 80% Ca and the remainder of M is Sr, Ba, Mg, Li or Cu, in each case alone or in combination, wherein some of the Al up to 20%, can be replaced by B, and wherein N can be partially replaced by O, F, Cl, alone or in combination, wherein the conversion LED emits warm-white light with a color temperature between 2900 K to 3500 K.
A conversion LED comprising a chip which emits primary radiation and a luminescent substance-containing layer which is on the chip or positioned so that it intercepts the primary radiation emitted from the chip and which converts at least some of the primary radiation of the chip into secondary radiation, wherein a first luminescent substance of the A3B5O12:Ce garnet type which emits yellow green and a second luminescent substance of the MAlSiN3:Eu calsine type which emits orange red is used, wherein the peak wavelength of the primary radiation lies in the 435 nm to 455 nm range, the first luminescent substance being a garnet having essentially the cation A=75 to 100 mol. % Lu, remainder Y and a Ce content of 1.5 to 2.9 mol. %, where B=10 to 40 mol. % Ga, remainder Al, while the second luminescent substance is of the basic MAlSiN3:Eu type, where M is Ca alone or at least 80% Ca and the remainder of M is Sr, Ba, Mg, Li or Cu, in each case alone or in combination, wherein some of the Al up to 20%, can be replaced by B, and wherein N can be partially replaced by O, F, Cl, alone or in combination, wherein the conversion LED emits warm-white light with a color temperature between 3000 K to 3050 K.
Dependencies are inferred from the claim text.