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US 11,024,500 B2Granted
Low-pressure discharge lamp
AssigneeLed Vance GmbH
InventorArmin Konrad
Life of this patent
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Abstract
A low-pressure discharge lamp having a discharge vessel and a coating structure. The coating structure is formed on an inner side of the discharge vessel. The coating structure has nanoscale phosphate particles and/or nanoscale functional oxide. Alternatively or in addition, the phosphate particles are free or at least approximately free of rare earth metals. The nanoscale phosphate particles range in size from 5 nm to 800 nm.
Claims29
A low-pressure discharge lamp comprising:
- a discharge vessel;
- and
- a coating structure disposed on an inner side of the discharge vessel, wherein the coating structure comprises:
- a first coating layer disposed on the inner side of the discharge vessel, wherein the first coating layer comprises:
- 50-95% aluminum oxide;
- and
- 5-50% pyrogenic aluminum oxide;
- and
- a second coating layer disposed on the first coating layer, wherein the second coating layer comprises fluorescent particles;
- wherein the first coating layer further comprises at least one of:
- nanoscale phosphate particles;
- and
- nanoscale functional oxide.
10 more elements
A low-pressure discharge lamp comprising:
- a discharge vessel;
- and
- a coating structure disposed directly on an inner side of the discharge vessel, wherein the coating structure consists of one coating layer which comprises:
- 50-95% aluminum oxide;
- 5-50% pyrogenic aluminum oxide;
- and
- fluorescent particles;
- wherein the coating layer either:
- further comprises nanoscale phosphate particles but not nanoscale functional oxide;
- or
- further comprises nanoscale functional oxide but not nanoscale phosphate particle;
- wherein at least one of:
- the nanoscale phosphate particles have a mean particle size in the range of 5-800 nm;
- and
- a proportion of rare earth metals in the nanoscale phosphate particles is less than 500 ppm.
12 more elements
A low-pressure discharge lamp comprising:
- a discharge vessel;
- and
- a coating structure disposed on an inner side of the discharge vessel, wherein the coating structure comprises:
- a first coating layer disposed on the inner side of the discharge vessel, wherein the first coating layer comprises:
- 50-95% aluminum oxide;
- and
- 5-50% pyrogenic aluminum oxide;
- and
- a second coating layer disposed on the first coating layer, wherein the second coating layer comprises fluorescent particles;
- wherein the second coating layer either:
- comprises nanoscale phosphate particles but not nanoscale functional oxide, wherein at least one of:
- the nanoscale phosphate particles have a mean particle size in the range of 5-800 nm;
- and
- a proportion of rare earth metals in the nanoscale phosphate particles is less than 500 ppm;
- or
- comprises nanoscale functional oxide but not nanoscale phosphate particles.
13 more elements
A low-pressure discharge lamp comprising:
- a discharge vessel;
- and
- a coating structure disposed on an inner side of the discharge vessel, wherein the coating structure comprises:
- a first coating layer disposed on the inner side of the discharge vessel, wherein the first coating layer comprises:
- 50-95% aluminum oxide;
- and
- 5-50% pyrogenic aluminum oxide;
- and
- a second coating layer disposed on the first coating layer, wherein the second coating layer comprises fluorescent particles;
- wherein at least one of the first coating layer and the second coating layer further comprises at least one of:
- nanoscale phosphate particles, wherein the nanoscale phosphate particles are doped, and wherein at least one of:
- the nanoscale phosphate particles have a mean particle size in the range of 5-800 nm;
- and
- a proportion of rare earth metals in the nanoscale phosphate particles is less than 500 ppm;
- and
- nanoscale functional oxide, wherein the nanoscale functional oxide is not doped.
13 more elements
A low-pressure discharge lamp comprising:
- a discharge vessel;
- and
- a coating structure disposed directly on an inner side of the discharge vessel, wherein the coating structure consists of one coating layer which comprises:
- 50-95% aluminum oxide;
- 5-50% pyrogenic aluminum oxide;
- fluorescent particles;
- and
- at least one of:
- nanoscale phosphate particles, wherein the nanoscale phosphate particles are doped;
- and
- nanoscale functional oxide, wherein the nanoscale functional oxide is not doped;
- wherein at least one of:
- the nanoscale phosphate particles have a mean particle size in the range of 5-800 nm;
- and
- a proportion of rare earth metals in the nanoscale phosphate particles is less than 500 ppm.
12 more elements
Dependencies are inferred from the claim text.