Layered phosphor coatings for led devices
First Claim
1. A light emitting device comprised of a light emitting diode on a mounting surface, said light emitting diode including a substrate layer comprised of silicon carbide and at least one active region, at least one resilient substantially transparent and substantially phosphor free polymer layer extending from said mounting surface to above at least one quarter of a height of the substrate layer and below a top surface of the light emitting diode, and at least a second layer containing phosphor extending from said phosphor free polymer layer to a height above a top surface of said light emitting diode.
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Accused Products
Abstract
A light emitting device comprised of a light emitting diode on a mounting surface, the light emitting diode includes a substrate layer and at least one active region. A resilient substantially transparent and substantially phosphor free polymer layer extends from the mounting surface to above at least one quarter of a height of the substrate layer but below a top surface of the light emitting diode. A second phosphor containing layer extends from the phosphor free polymer layer to above the top surface of the light emitting diode.
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Citations
20 Claims
- 1. A light emitting device comprised of a light emitting diode on a mounting surface, said light emitting diode including a substrate layer comprised of silicon carbide and at least one active region, at least one resilient substantially transparent and substantially phosphor free polymer layer extending from said mounting surface to above at least one quarter of a height of the substrate layer and below a top surface of the light emitting diode, and at least a second layer containing phosphor extending from said phosphor free polymer layer to a height above a top surface of said light emitting diode.
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9. The light emitting device wherein said phosphor is selected from TAG:
- Ce, YAG;
Ce and mixtures or derivatives thereof (i.e Ga for Al or Gd for Y or Gd for Tb compositional substitutions).
- Ce, YAG;
- 10. A method of manufacturing a light emitting device comprising mounting a light emitting diode on a surface, said light emitting diode having a substrate layer and at least one active region, providing an electrical connection to said light emitting diode, depositing a substantially transparent and substantially phosphor free polymer adjacent said mounting surface to above at least one quarter of a height of the substrate layer and below a top surface of the light emitting diode, and depositing at least a second layer containing phosphor disposed in a carrier material on said phosphor free polymer layer to above a top surface of said light emitting diode.
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20. A light emitting device comprised of a light emitting diode on a mounting surface, said light emitting diode including a substrate layer, a substantially transparent and substantially phosphor free polymer layer extending from said mounting surface to above at least one quarter of a height of the substrate layer and below a top surface of the light emitting diode, and a phosphor containing layer extending from said phosphor free polymer layer to a height above the top surface of said light emitting diode.
Specification