Phosphor layer arrangement for use with light emitting diodes
View Patent ↗Phosphor layer arrangement for use with light emitting diodes. In an aspect, a light emitting diode apparatus is provided that includes a least one light emitting diode, an encapsulation covering the at least one light emitting diode, a lens having a phosphor layer formed upon a bottom surface, the lens positioned to cover at least part of the encapsulation, and an air gap between the phosphor layer and the encapsulation. In an aspect, a light emitting diode lamp is provided that includes a package, a least one light emitting diode, an encapsulation covering the at least one light emitting diode, a lens having a phosphor layer formed upon a bottom surface, wherein the lens is positioned to cover at least part of the encapsulation, and an air gap between the phosphor layer and the encapsulation.
1. A light emitting diode lamp comprising:
at least one light emitting diode;
a lower layer of plastic formed proximate the at least one light emitting diode;
an upper layer of plastic formed upon the lower layer of plastic;
a lead frame disposed between the upper layer of plastic and the lower layer of plastic;
a stepped reflector formed upon the upper layer of plastic and the lower layer of plastic, the stepped reflector comprising two sloped reflector portions having a wire bonding region of the lead frame therebetween;
a lens having a phosphor layer formed upon a bottom surface of the lens, wherein the lens is configured to receive light from the at least one light emitting diode.
2. The lamp of claim 1 , wherein the phosphor layer comprises an inorganic dye.
3. The lamp of claim 1 , wherein the phosphor layer has a uniform thickness.
4. The lamp of claim 1 , wherein the phosphor layer has a varying thickness.
5. The lamp of claim 1 , wherein the phosphor layer has a thickness in the range of approximately 5 to 500 microns.
6. The lamp of claim 1 , further comprising an encapsulation covering the at least one light emitting diode and an air gap between the phosphor layer and the encapsulation wherein the air gap has a thickness in the range of approximately 5 to 1000 microns.
7. An illumination device comprising the light emitting diode lamp of claim 1 and further comprising a power source in electrical communication with the light emitting diode lamp.
8. A light emitting diode apparatus comprising:
at least one light emitting diode;
a lower layer of plastic formed proximate the at least one light emitting diode;
an upper layer of plastic formed upon the lower layer of plastic;
a lead frame disposed between the upper layer of plastic and the lower layer of plastic;
a stepped reflector formed upon the upper layer of plastic and the lower layer of plastic, the stepped reflector comprising two sloped reflector portions having a wire bonding region of the lead frame therebetween.
9. The apparatus of claim 8 , further comprising:
an encapsulation covering the at least one light emitting diode; and
a lens having a phosphor layer formed between first and second lens portions, the lens positioned so that the second lens portion fits against the encapsulation.
10. The apparatus of claim 9 , wherein the phosphor layer has a uniform thickness.
11. The apparatus of claim 9 , wherein the phosphor layer has a varying thickness.
12. The apparatus of claim 9 , wherein the phosphor layer has a thickness in the range of approximately 5 to 500 microns.
13. The apparatus of claim 9 , wherein the phosphor layer comprises an inorganic dye.