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AssigneeKoninklijke Philips N.V.
InventorsGeorg Greuel, Thomas Juestel, Helga Bettentrup, Benjamin Herden, David Enseling
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The invention provides a lighting unit (100) comprising (1) a vacuum ultraviolet (VUV) radiation based source of radiation (10) configured to generate VUV radiation (11), and (2) a luminescent material (20) configured to convert at least part of the VUV radiation into visible luminescent material light (21), wherein the luminescent material comprises a trivalent praseodymium containing material selected from the group consisting of (Zr1-x-yHfxPry)(Si1-yPy)04, (Zr1-x-yHfxPry)3((P1-3/4yS3/4y)04)4, and (Zr1-x-yHxPry)3((B1-3/4yX3/4y))O3)4, with x in the range of 0.0-1.0 and y being larger than 0 and being equal to or smaller than 0.15.
A lighting unit comprising (1) a vacuum ultraviolet (VUV) radiation based source of radiation configured to generate VUV radiation, and (2) a luminescent material configured to convert at least part of the VUV radiation into visible luminescent material light, wherein the luminescent material comprises a trivalent praseodymium containing material selected from the group consisting of (Zr1-x-yHfxPry)(Si1-yPy)O4, (Zr1-x-yHfxPry)3((P1-3/4yS3/4y)O4)4, and (Zr1-x-yHfxPry)3((B1-3/4yS3/4y))O3)4, with x in the range of 0.0-1.0, y being larger than 0 and being equal to or smaller than 0.15 and 1−x−y>=0.
Use of the luminescence of a trivalent praseodymium containing material selected from the group consisting of (Zr1-x-yHfxPry)(Si1-yPy)O4, (Zr1-x-yHfxPry)3((P1-3/4yS3/4y)O4)4, and Zr1-x-yHfxPry)3((B1-3/4yS3/4y)O3)4, with x=0.0-1.0, y being larger than 0 and being equal to or smaller than 0.15 and 1−x−y>=0, for in situ temperature measurement of the temperature in a discharge vessel.
An optical sensor comprising a trivalent praseodymium containing material selected from the group consisting of (Zr1-x-yHfxPry)(Si1-yPy)O4, (Zr1-x-yHfxPry)3((P1-3/4yS3/4y)O4)4, and (Zr1-x-yHfxPry)3((B1-3/4yS3/4y)O3)4, with x=0.01-1.0, y being larger than 0 and being equal to or smaller than 0.15 and 1−x−y>=0, said sensor being configured to measure the luminescent material light in at least part of the wavelength range of 550-700 nm and configured to generate a corresponding sensor signal.
Use of a trivalent praseodymium containing material selected from the group consisting of (Zr1-x-yHfxPry)(Si1-yPy)O4, (Zr1-x-yHfxPry)3((P1-3/4yS3/4y)O4)4, and (Zn1-x-yHfxPry)3((B1-3/4yS3/4y))O3)4, with with x=0.0-1.0, y being larger than 0 and being equal to or smaller than 0.15 and 1−x−y>=0, as red luminescent material in a plasma display panel.
Use of a trivalent praseodymium containing material selected from the group consisting of (Zr1-x-yHfxPry)(Si1-yPy)O4, (Zr1-x-yHfxPry)3((P1-3/4yS3/4y)O4)4, and (Zr1-x-yHfxPry)3((B1-3/4yS3/4y))O3)4, with x=0.0-1.0, y being larger than 0 and being equal to or smaller than 0.15 and 1−x−y>=0, as red luminescent material in a dielectric barrier (DB) discharge lamp comprising a discharge vessel containing the luminescent material.
A trivalent praseodymium containing material selected from the group consisting of (Zr1-x-yHfxPry)(Si1-yPy)O4, (Zr1-x-yHfxPryy)3((P1-3/4yS3/4y)O4)4, and (Zr1-x-yHfxPry)3((B1-3/4yS3/4y))O3)4, with x=0.01-1.0, y being larger than 0 and being equal to or smaller than 0.15 and 1−x−y>=0.
Dependencies are inferred from the claim text.