Light-emitting device with coated phosphor
First Claim
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1. A light-emitting device provided with at least one light-emitting diode and a phosphor layer which comprises at least a phosphor comprised of phosphor particles with a coating, characterized in that the coating is a glass material.
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Abstract
The invention describes a light-emitting device (1) which comprises a light-emitting diode and a phosphor layer. To prolong the useful life of the light-emitting device (1), a phosphor (4) in the phosphor layer (2) has a water-resistant coating.
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Citations
8 Claims
- 1. A light-emitting device provided with at least one light-emitting diode and a phosphor layer which comprises at least a phosphor comprised of phosphor particles with a coating, characterized in that the coating is a glass material.
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7. A light-emitting device provided with at least one light-emitting diode and a phosphor layer which comprises at least a phosphor comprised of phosphor particles with a coating, characterized in that the coating is an inorganic borate material.
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8. A light-emitting device provided with at least one light-emitting diode and a phosphor layer which comprises at least a phosphor comprised of phosphor particles with a coating, characterized in that the phosphor is chosen from the group consisting of aluminate and vandate phosphors, the coating comprises a glass material chosen from the group consisting of borosilicates, phosphosilicates and alkali silicates.
Specification