Luminous substance for a light source and light source associates therewith
AssigneesPatent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH, Osram Opto Semiconductors GmbH & Co. OHG
InventorsFranz Kummer, Franz Zwaschka, Andries Ellens, Alexandra Debray, Guenther Waitl
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Abstract
A phosphor for light sources, the emission from which lies in the short-wave optical spectral region, as a garnet structure A3B5O12. It is activated with Ce, the second component B representing at least one of the elements Al and Ga, and the first component A is terbium or terbium together with at least one of the elements Y, Gd, La and/or Lu. In a preferred embodiment, a phosphor having a garnet of structure (Tb1−x−yRExCey)3(Al,Ga)5O12, where RE=Y, Gd, La and/or Lu; 0≦x≦0.5−y; 0<y<0.1 is used.
Claims33
A light source comprising:
- a radiation source having an emission from 420 to 490 nm and a phosphor having a garnet structure as represented by A3B5O12:Ce wherein A is terbium or terbium together with at least one of the elements Y, Gd, La, and/or Lu and B is at least one of the elements Al and Ga, the phosphor converting at least a part of the emission from the radiation source into a longer-wave radiation.
A light source comprising:
- a radiation source having an emission from 420 to 490 nm and a phosphor for converting at least a portion of the emission from the radiation source into a longer-wave radiation, the phosphor having a garnet structure represented by
- (Tb1−x−yRExCey)3(Al,Ga)5O12, where
- RE is Y, Gd, La and/or Lu;
- 0≦x≦0.5−y;
- and
- 0<y<0.1.
A white light source comprising:
- a light-emitting diode and a phosphor, the light-emitting diode having an emission from 420 to 490 nm, the phosphor having a garnet structure represented by A3B5O12:Ce wherein A is terbium or terbium together with at least one of the elements Y, Gd, La, and/or Lu and B is at least one of the elements Al and Ga, the phosphor converting a part of the emission from the light-emitting diode into a longer-wave radiation, the remaining emission from the light-emitting diode and the longer-wave radiation from the phosphor forming white light.
A white light source comprising:
- a light-emitting diode and a phosphor, the light-emitting diode having an emission from 420 to 490 nm, the phosphor converting a part of the emission from the light-emitting diode into a longer-wave radiation, the remaining emission from the light-emitting diode and the longer-wave radiation from the phosphor forming white light, the phosphor having a garnet structure represented by
- (Tb1 −x−yRExCey)3(Al,Ga)5O12, where
- RE is Y, Gd, La and/or Lu;
- 0≦x ≦0.5−y;
- and
- 0<y<0.1.
A light source comprising:
- a radiation source having an emission from 420 to 490 nm and a phosphor for converting at least a portion of the emission from the radiation source into a longer-wave radiation, the phosphor having a garnet structure represented by
- (TbxRE1−x−yCey)3(Al,Ga)5O12, where
- RE is Y, Gd, La and/or Lu;
- 0.01<x<0.02;
- and
- 0<y<0.1.
Dependencies are inferred from the claim text.